WO2016132626A1 - Injector, lancet assembly, and puncture device - Google Patents

Abstract

Provided is an injector comprising a puncture depth adjustment mechanism including: a cylinder member provided with a protruding portion protruding from a plunger, an irregular portion, and a step portion; and a spring member disposed side by side with the cylinder member in the axial direction of the injector. An injector casing is provided with a complementary shaped portion having a shape complementary with a part of the irregular portion, wherein said part of the irregular portion of the cylinder member and the complementary shaped portion of the injector casing are maintained in contact with one other by a pressing force provided by the spring member. When the plunger is moved forward for puncturing, the protruding portion of the plunger impinges upon the step portion of the cylinder member, preventing further forward movement of the plunger. To adjust the puncture depth, the cylinder member is rotated about the axis thereof, making it possible to change the height at which the protruding portion of the plunger impinges upon the step portion, and thus changing the forward movement distance of the plunger.

Description

Injector, lancet assembly and puncture device

The present invention relates to a puncture device used for puncturing a predetermined part of a body with a sharp member (for example, a needle) for the purpose of collecting body fluid such as blood. In particular, the present invention also relates to a lancet assembly (an assembly comprising a lancet and a lancet holder that accommodates the lancet assembly) that is a component of such a puncture device, and an injector used in combination with such a lancet assembly.

It is necessary to collect blood to measure blood glucose levels in diabetic patients. Various puncture devices are used to collect a small amount of blood. Such a device is generally composed of a lancet (for example, Patent Document 1) and an injector. While the lancet is a member used for actual puncture, the injector has a function of firing the lancet toward a predetermined location.

Specifically, the lancet is provided with a “puncture needle”, while the injector is provided with a “plunger having a lancet mounting portion and a spring”. The plunger spring is used in a compressed state, and releasing the compressed state causes the plunger to move instantaneously. In use, after the lancet is attached to the plunger of the injector, the compressed state of the plunger spring is released by the trigger. Accordingly, the plunger with the lancet is fired in the puncturing direction, and puncturing is performed at a predetermined location.

US Pat. No. 5,385,571

The present applicant has invented the puncture device described below, and has filed an application relating to the invention (International Patent Publication No. 2007/018215, filing date: August 8, 2006) The title of the invention: “Puncture device and lancet assembly and injector assembly constituting it”). A lancet assembly and an injector assembly according to the present invention will be briefly described with reference to the drawings (hereinafter, “injector assembly” is also referred to as “injector”). FIG. 47 shows the appearance of the lancet assembly 100 ′, and FIG. 48 shows the appearance of the injector 200 ′. As shown in FIG. 47, the lancet assembly 100 'includes a lancet 101' and a protective cover 102 '. As shown in FIGS. 49 and 50, the lancet 101 'has a lancet body 104', a lancet cap 106 'and a puncture needle 105'. The metal puncture needle 105 'exists across the resin lancet body 104' and the lancet cap 106 '. The tip of the puncture needle 105 'is covered with a lancet cap 106', and the lancet cap 106 'and the lancet body 104' are joined together via a weakening member 108 '. 47 and 50, the protective cover 102 'is provided so as to surround a part of the lancet body 104'. After such a lancet assembly 100 ′ is loaded into the injector 200 ′, the lancet cap 106 ′ is removed. As a result, the tip of the puncture needle 105 'is exposed, so that the lancet can be used for puncture.

An injector 200 'shown in FIG. 48 is a device that can be used in combination with the lancet assembly 100' to fire a "lancet body with the tip of the puncture needle 105 'exposed". The injector 200 'has a "plunger 204' that can be engaged with the rear end of the lancet body and that fires the lancet body in the puncturing direction" (see FIG. 51). When loading into the injector 200 ', as shown in FIG. 51, the lancet assembly 100' is inserted from the front end opening 214 'of the injector 200'. When inserted to some extent, as shown in FIG. 52, the rear portion 116 'of the lancet assembly 100' is gripped by the tip 264 'and the flange 266' of the plunger 204 '. As the insertion continues, the plunger 204 'retracts and the firing energy is accumulated. That is, the spring (not shown) provided in the plunger 204 ′ is compressed by the retraction of the plunger 204 ′ (therefore, when the compressed state is released, the plunger is instantaneously moved forward, and the lancet is Will be fired). FIG. 53 shows the injector 200 ′ with the plunger retracted and the firing energy accumulated.

When the loading of the lancet assembly 100 ′ into the injector 200 ′ is completed, the lancet cap 106 ′ is removed to expose the tip of the puncture needle 105 ′. The removal of the lancet cap 106 'will be described in detail as follows. As shown in FIGS. 49 and 50, the lancet body 104 'and the lancet cap 106' are integrally connected by a weakened portion 108 'positioned therebetween. Such weakening member 108 'can be broken by rotating the lancet body 104' and the lancet cap 106 'in the opposite directions around the puncture needle (FIG. 53 shows a mode of turning in the G direction). Thereby, the lancet cap 106 'can be removed. That is, the tip of the puncture needle 105 ′ is exposed by so-called “twist-off”.

When puncturing, the front end opening 214 'of the injector 200' is applied to a predetermined site (for example, fingertip) to be punctured, and then the press portion 542 'of the trigger member 514' is pushed (see FIG. 54). By pushing the press portion 542 ', the plunger 204' is fired forward (that is, the compressed spring is released), and puncture is performed by the puncture needle.

Here, the inventors of the present application have found that the injector has an important function of firing the lancet, and there are still matters to be improved as follows.

● Depending on the puncture location, there is a need to change the puncture depth of the puncture needle, and puncture devices, especially injectors, are rarely provided with a mechanism for adjusting such puncture depth. Even if such a mechanism is provided, the depth adjustment dial provided in the injector is not always easy to handle. Specifically, when the user turns the depth adjustment dial with his / her fingertip, there is little change accompanying the adjustment (for example, “click to indicate that the adjustment was performed when the adjustment dial was rotated / the scale value changed) There was a place where it was difficult for the user to discriminate sensuously and clearly whether or not the adjustment was made / the scale value changed appropriately.

● When the lancet assembly is loaded into the injector, it is desired to hold the lancet assembly suitably to the injector, but the specifications of the injector have not always been suitable for it. In addition, even if such specifications are taken into account, it cannot be said that they exhibit sufficient functions. Specifically, it is conceivable to hold and fix the holder of the lancet assembly with an engaging projection provided on the injector, but the injector itself is made of resin, and therefore the engaging projection is also made of resin. As a result, the engaging protrusions wear out during repeated use, and the holding force decreases.

The present inventors have found that the lancet assembly itself still has the following matters to be improved.

● The lancet that constitutes the lancet assembly is used after the cap that covers the needle tip is finally removed, but the needle tip may be bent when the cap is removed. Specifically, a load is applied to the needle tip due to the “triggering operation” performed to remove the cap, and as a result, the needle tip may be bent or broken. In particular, recently, there is a tendency to use an extremely fine puncture needle, and the tip of the needle is particularly likely to bend with such an ultrafine puncture needle. When the needle tip is bent, the pain felt by the blood sample during puncture increases.

The present invention has been made in view of the above circumstances. That is, the subject of this invention is providing the puncture device comprised from a more suitable injector and a lancet assembly.

In order to solve the above problems, in the present invention,
An injector for firing a lancet of a lancet assembly for puncture, comprising a plunger for firing the lancet in the puncture direction, and an injector casing containing the plunger,
The puncture depth adjustment mechanism of the injector
A protrusion protruding outward from the plunger in the transverse direction thereof,
It has a cylindrical member provided with an uneven part and a step part, and a spring member provided side by side with the cylindrical member along the axial direction of the injector,
The concave and convex portion is provided on the cylindrical member so that the normal of the surface forming the concave and convex portion is substantially parallel to the axial direction of the injector, while the complementary shape portion having a shape complementary to a part of the concave and convex portion is the injector Abutting between a part of the concavo-convex part of the cylindrical member and the complementary shape part of the injector casing is held by the pressing force provided from the spring member,
When the plunger moves forward at the time of puncturing, the plunger's protruding part collides with the step part of the cylindrical member, so that the plunger cannot move further forward, and the puncture depth In adjusting the position of the plunger, by rotating the cylindrical member about its axial center, the step portion where the protruding portion of the plunger collides can be changed to a step portion having a different height. An injector is provided in which the travel distance is changed.

One of the features of the injector according to the present invention is that the puncture depth adjusting mechanism has a “cylindrical member having an uneven portion and a step portion”. In particular, the concavo-convex portion is provided on the cylindrical member so that the normal line of the surface forming the concavo-convex portion of the cylindrical member (that is, the concavo-convex surface) is substantially parallel to the axial direction of the injector, while complementary to part of the concavo-convex portion A complementary shape portion having a general shape is provided in the injector casing, and the contact between the part of the concavo-convex portion of the cylindrical member and the complementary shape portion of the injector casing is maintained by the pressing force provided from the spring member. . As a result, a “click feeling” suitable for adjusting the puncture depth by turning the cylindrical member with the fingertip is provided to the user.

In a preferred aspect of the injector according to the present invention, the uneven portion is provided in the end region of the outer peripheral surface of the cylindrical member, and the complementary shape portion is provided on the inner wall surface of the injector casing. In another preferable aspect, the step portion is provided on the inner peripheral surface of the cylindrical member, and the plunger is positioned so that the protruding portion of the plunger is positioned inside the cylindrical member and behind the step portion. Through.

It is preferable that the concavo-convex portions of the cylindrical member have a form that is periodically continuous along the circumferential direction of the cylindrical member. When the puncture depth is adjusted by rotating the cylindrical member, a part of the concavo-convex part of the cylindrical member that comes into contact with the complementary shape part of the injector casing is changed to another part. Thus, when a part of the concavo-convex part of the cylindrical member that contacts the complementary shape part of the injector casing changes to another part, the spring member preferably contracts temporarily. That is, it is preferable that the spring member returns to its original form after contracting once. The spring member may be a coil spring, for example.

In another preferred embodiment, the cylindrical member is provided with a scale value along the circumferential direction, while the injector casing is provided with a scale opening window for exposing the scale value of the cylindrical member. . In this aspect, the scale value of the cylindrical member is composed of the first value sequence and the second value sequence adjacent to each other, and the scale opening windows are provided so as to form a pair on the opposing side surfaces of the injector casing. The first numerical value window is exposed from the first opening window, while the second numerical value string is exposed from the second opening window.

Further, in the present invention, an injector for firing a lancet of a lancet assembly for use in puncturing, comprising a plunger for firing the lancet in a puncturing direction, and an injector casing containing the plunger,
The injector lancet assembly holding mechanism
A lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly; and a metal holder holding member attached to the lancet assembly receiving member.
An injector is also provided in which the holder clamping member clamps the holder when the lancet assembly is loaded into the injector so that the holder of the lancet assembly fits in the lancet assembly receiving member.

One of the features of the injector according to the present invention is that the lancet assembly holding mechanism has a “lancet assembly receiving member that is provided at the front end opening of the injector and can hold the holder of the lancet assembly” and “the lancet assembly receiving member”. A metal holder holding member attached to the member. In particular, when the lancet assembly is loaded into the injector so that the holder of the lancet assembly fits in the lancet assembly receiving member, the holder holding member holds the holder. Thus, the lancet assembly can be suitably held on the injector when the lancet assembly is loaded into the injector.

In a preferred aspect of the injector according to the present invention, the holder clamping member has elastic characteristics. In this aspect, the holder of the lancet assembly is clamped by the holder clamping member due to the elastic force of the holder clamping member.

The overall shape of the holder clamping member has a substantially ring shape, for example, a partially cut ring shape. Moreover, the holder clamping member is not limited to a single product, and may be composed of a plurality of parts. For example, the holder clamping member may have a two-part configuration including a sub clamping member A and a sub clamping member B, and the sub clamping member A and the sub clamping member B may be arranged to face each other.

It is preferable that the holder clamping member has a locally curved portion that is partially bent or bent inwardly. In the “two-part configuration”, it is preferable that each of the sub-clamping member A and the sub-clamping member B has a local curved portion. When the holder clamping member has a local curved portion, when the lancet assembly is loaded into the injector, the local curved portion is in contact with the outer surface of the holder of the lancet assembly (such as the holder outer circumferential surface or the holder circumferential ridge provided on the holder). Is preferred. Further, the holder holding member is preferably attached so as to be in close contact with the outer surface of the lancet assembly receiving member, and on the inner surface of the lancet assembly receiving member, the local bending portion of the holder holding member extends from the notch of the lancet assembly receiving member. It is preferable that it is exposed. In addition, it is also preferable that at least a part of the inner side surface of the local curved portion has a dome shape (that is, the inner side surface of the local curved portion has a dome shape portion). That is, the holder contact surface of the holder holding member preferably has a substantially hemispherical shape.

When the holder clamping member is composed of the sub clamping member A and the sub clamping member B, the lancet assembly receiving member is also “sub receiving member A positioned on the front side of the injector” and “sub receiving member positioned on the rear side of the injector” It preferably has a two-part construction consisting of “B”. The sub-receiving member A preferably has a ring shape as a whole. In this case, it is preferable that the sub receiving member A is provided with a pair of rear projecting portions projecting rearward, and the pair of rear projecting portions are positioned on the sub clamping member A and the sub clamping member B. .

The injector having the “puncture depth adjusting mechanism” and / or the “lancet assembly holding mechanism” as described above has an ejector. That is, it further has an ejector for discharging the lancet assembly loaded in the injector.

In a preferred aspect, the ejector is provided with an elastic portion, while the inner wall surface of the injector casing is provided with a protrusion. When the lancet assembly is loaded into the injector so that the lancet and the plunger are engaged with each other, it is preferable that the elastic portion of the ejector once abuts on the protrusion of the injector and then climbs over the protrusion. In particular, it is preferable that the lancet and the plunger are completely engaged when the elastic portion of the ejector gets over the protrusion of the injector.

The ejector has, for example, a long shape, and it is preferable that an elastic portion is provided at the tip of the long shape ejector. Moreover, it is preferable that an elastic part has a branch form extended to back so that it may branch from an ejector body.

Furthermore, it is preferable that an injector having a puncture depth adjusting mechanism and / or a “lancet assembly holding mechanism” has a “recharge mechanism.” Specifically, the injector is used for retracting the plunger of the ejector. In such a case, when the ejector is moved backward after puncturing, the plunger retracting contact portion of the ejector contacts the plunger, and as a result, the pushing force received from the ejector. The plunger can be retracted due to the pressure, thus allowing “recharging”.

The present invention also provides a lancet assembly including a lancet and a holder storing the lancet. In such a lancet assembly, the lancet has a lancet body, a lancet cap and a puncture needle, and the metal puncture needle is present in the resin lancet body and the lancet cap, and is punctured by the lancet cap. The needle tip of the needle is covered. And the lancet cap of the lancet is
Needle tip protector that protects the puncture needle,
It has a cap head part that is connected to the needle point protection part and is positioned at the forefront of the lancet cap, and a pair of rear extension parts that are connected to the cap head part and extend backward from the cap head part. And
A rearward extension of the lancet cap extends along the outer surface of the holder body.

One of the features of the lancet assembly according to the present invention is that it has a pair of rearward extending portions extending rearward from the cap head portion. In particular, the rearward extension of the lancet cap extends along the outer surface on the outer surface of the holder body. Thereby, the inconvenience that the needle point is bent or broken when the cap is removed can be prevented. Here, “the rearward extending portion of the lancet cap extends along the outer surface on the outer surface of the holder body” means at least the central portion of the rearward extending portion of the lancet cap ( A central portion in the width direction of the rear extension portion) extends along the outer surface of the holder body so as to be close to or in contact therewith.

In a preferred embodiment, when the lancet cap is removed from the lancet, the posterior extension of the lancet cap can be rotated so that the posterior extension of the lancet slides on the outer surface of the body of the holder, whereby the needle It is possible to more suitably prevent the previous bending / bending.

In a preferred aspect, the inner surface of the rearward extending portion of the lancet cap and the outer surface of the holder body are close to or in close contact with each other. Moreover, it is preferable that at least a part of the inner side surface of the rearward extending portion of the lancet cap and at least a part of the outer side surface of the body of the holder have a complementary shape. Furthermore, it is preferable that the rearward extension part of the lancet cap has a long shape and extends rearward so that the free end extends outward.

The lancet assembly of the present invention has a shape feature in which the rearward extension portion of the lancet cap is suitably extended. In particular, the rearward extending portion of the lancet cap extends long in light of the relationship between the position of the needle tip and / or the position of the rear end of the needle tip protecting portion. Specifically, the rear extension portion extends rearward so that the free end / tip of the rear extension portion of the lancet cap is positioned rearward of the needle tip position of the puncture needle or the rear end of the needle tip protection portion. Exist. In a preferred embodiment, the rearward extension of the lancet cap extends to the lancet body (in other words, the elongate length is such that the free end of the rearward extension is positioned above the lancet body. The rearward extending part of the shape extends long backward from the cap head part).

In another preferred embodiment, the holder body is not provided with an opening, and the lancet cap needle tip protecting portion and the lancet body are housed in the holder without protruding from the holder.

In still another preferred aspect, the lancet body includes a pair of flexible protrusions and a pair of bent shape variable positions. The pair of flexible protrusions are provided on the front side of the lancet body, whereas the pair of bent shape variable positions are preferably provided on the rear side of the lancet body. The bent shape variable position portion preferably has a hollow shape.

When the lancet body has a bent shape variable position part, it is preferable that the holder has a locked part for locking the bent shape variable position part. In such a case, it is particularly preferable that the bent portion of the bent shape variable position portion is positioned so as to be locked to the locked portion of the holder.

Furthermore, a puncture device is also provided in the present invention. That is, a puncture device composed of the above-described injector and lancet assembly is provided.

One of the features of the puncture device according to the present invention includes an injector provided with a suitable “puncture depth adjusting mechanism” and / or “lancet assembly holding mechanism”, and a lancet assembly provided with a suitable “cap removal mechanism”. That is, a puncture device is configured.

A circumferential ridge may be provided on the outer peripheral surface of the holder of the lancet assembly used in the puncture device. In a preferred embodiment, when the lancet assembly is loaded into the injector, the circumferential raised portion of the holder once comes into contact with the dome-shaped portion of the holder holding member, and then gets over the dome-shaped portion. When the circumferential raised portion of the holder gets over the dome-shaped portion of the holder clamping member, a click feeling is provided to the user.

In another preferred aspect, the holder includes a “further locked portion” for locking the bent shape variable position portion in the lancet assembly,
After the lancet and plunger are engaged with each other and the lancet assembly is loaded into the injector, when only the lancet is moved forward, the bent portion of the lancet body's flexure shape variable position will cause the holder's further engagement Lock to “stop”. “Locked portion” and “further locked portion” for locking the bent shape variable position portion have, for example, the form of an opening provided in the holder.

The injector provided with the “puncture depth adjusting mechanism” according to the present invention provides the user with a click feeling suitable for adjusting the puncture depth.Specifically, a spring member (particularly “in the axial direction of the injector”). The abutment between the concave and convex portions of the cylindrical member and the complementary shape portion of the injector casing is maintained by the pressing force provided from the spring member provided side by side with the cylindrical member. When the cylindrical member is rotated to adjust the depth, a part of the concavo-convex part of the cylindrical member that abuts the complementary shape part of the injector casing is changed to another part. A click feeling is provided due to the pressing force. More specifically, from the contact state between “a part of the uneven part of the cylindrical member” and “the complementary shape part of the injector casing” under the condition that the pressing force of the spring member is always applied, the “an uneven part of the cylindrical member” Since the “other part of” and “the complementary shape portion of the injector casing” are instantaneously switched to another contact state, a suitable click feeling is provided to the user.

Moreover, the injector provided with the “lancet assembly holding mechanism” according to the present invention exhibits a sufficient function in that the lancet assembly is held by the injector. Specifically, the lancet assembly during or after loading can be appropriately held in the injector by the holder holding member attached to the lancet assembly receiving member. In particular, the lancet assembly can be appropriately held with respect to the injector due to the elastic force of the holder clamping member. Since it is held in this way, for example, when the lancet assembly holder is pressed against the puncture site and the puncture is performed, the inconvenience that the holder is inclined with respect to the injector (particularly, the “lancet assembly receiving member”) is prevented, which is preferable. Puncture can be provided. In addition, since the holder holding member is made of metal, it is difficult to wear even after repeated use, and the holding power is prevented from being lowered. Similarly, since it is made of metal, it is difficult to be subject to fluctuations due to temperature, and a constant holding force can be provided regardless of the place of use or season of use.

Furthermore, in the lancet assembly provided with the “cap removal mechanism” according to the present invention, when the lancet cap is removed from the lancet, the rearward extension portion is arranged so that the rearward extension portion of the lancet cap slides on the outer surface of the holder body. Can be rotated. Thereby, most of the force exerted on the puncture needle when the cap is removed can be changed to the rotational force of the puncture member, and the force exerted on the tip of the puncture needle can be reduced as much as possible. Therefore, damage to the puncture needle such as bending or bending when removing the cap is suitably prevented. In particular, recently, there is a tendency to use an ultrafine puncture needle, and even such an ultrafine puncture needle can suitably prevent the bending of the needle tip. When the puncture needle is prevented from being bent, the trajectory of the puncture needle becomes substantially linear, and as a result, the pain felt by the puncture subject (that is, the blood sample) during puncture can be reduced. This is not limited to a specific theory, but is considered to be caused by a phenomenon that the puncture site of the blood sample is “squeezed out” by the puncture needle. Further, in the lancet assembly of the present invention, “bending” of the puncture needle is prevented, and even if the user is different, a constant and same removal operation can always be secured, so that the puncture tip portion is substantially constant. An exposure state can be obtained. Therefore, even if the users are different, the puncture trajectory of the puncture needle becomes substantially constant, and the effect that the variation among users is reduced can also be achieved.

FIG. 1 is a perspective view showing the appearance of the puncture device of the present invention. FIG. 2 is a perspective view showing the lancet assembly of the present invention and the lancet and holder constituting the lancet assembly. FIG. 3 is a perspective sectional view showing the internal structure of the injector of the present invention. FIG. 4 is a perspective view showing a use mode of the puncture device of the present invention (before the lancet assembly is loaded into the injector). FIG. 5 is a perspective view showing how the puncture device of the present invention is used (when the lancet assembly is loaded into the injector). FIG. 6 is a perspective view showing how the puncture device of the present invention is used (when the lancet cap is removed). FIG. 7 is a perspective view showing how the puncture device of the present invention is used (when puncturing). FIG. 8 is a perspective view showing the appearance of the injector of the present invention. FIG. 9 is a perspective view showing the internal structure and components of the injector of the present invention. FIG. 10 is a perspective view showing the internal structure and components of the injector of the present invention. FIG. 11 is a schematic diagram for explaining the puncture depth adjusting mechanism. FIG. 12 is a schematic diagram for explaining the puncture depth adjusting mechanism. FIG. 13 is a schematic diagram for explaining a puncture depth adjusting mechanism. FIG. 14 is a schematic diagram for explaining the puncture depth adjusting mechanism. FIG. 15 is a perspective view showing a “lancet assembly receiving member” and a “holder holding member” used in the lancet assembly holding mechanism. FIG. 16 is a schematic diagram for explaining the lancet assembly holding mechanism. FIG. 17 is a cross-sectional view schematically showing the change over time of the puncture device during use (before lancet assembly is loaded). FIG. 18 is a cross-sectional view schematically showing the change over time of the puncture device during use (while the lancet assembly is being loaded). FIG. 19 is a cross-sectional view schematically showing the change over time of the puncture device during use (completion of engagement between the lancet and the plunger). FIG. 20 is a cross-sectional view schematically showing the change over time of the puncture device during use (loading completion / charging completion). FIG. 21 is a cross-sectional view schematically showing the change over time of the puncture device during use (when puncturing). FIG. 22 is a cross-sectional view schematically showing the change over time of the puncture device during use (after puncture). FIG. 23 is a cross-sectional view schematically showing the change over time of the puncture device during use (discharge of the lancet assembly). FIG. 24 is a cross-sectional view schematically showing the change over time of the puncture device during recharging. FIG. 25 is a schematic diagram showing the appearance of the lancet assembly. FIG. 26 is a schematic diagram showing the internal structure of the lancet assembly. FIG. 27 is a cross-sectional view of the lancet with the cap removed. FIG. 28 shows a preferred modification of the lancet assembly receiving member and the lancet holder. FIG. 29 shows an example of a preferred modified form of the needle tip protecting part. FIG. 30 is a perspective view showing the appearance of a lancet assembly having a preferred form. FIG. 31 is an external perspective view of the lancet assembly shown in FIG. FIG. 32 is an external plan view of the lancet assembly shown in FIG. FIG. 33 is a plan view of the internal structure of the lancet assembly shown in FIG. FIG. 34 is a perspective view showing a holder holding member and a lancet assembly receiving member having a preferable form. FIG. 35 is a perspective view showing a holder holding member and a lancet assembly receiving member having a preferable form. FIG. 36 is a perspective view showing a holder holding member, a lancet assembly receiving member, and a lancet holder having a preferable form. FIG. 37 is a schematic diagram for explaining a click feeling caused by the holder clamping member. FIG. 38 is a perspective view and an end view showing a lancet assembly having a preferred form related to prevention of needle exposure due to lancet half slipping. FIG. 39 is a cross-sectional view (a no-load state before use) showing a lancet assembly having a preferred form related to prevention of needle exposure due to lancet half-missing. FIG. 40 is a cross-sectional view (lancet pull-out before use) showing a lancet assembly having a preferred form related to prevention of needle exposure due to lancet half-miss. FIG. 41 is a cross-sectional view (no load state after completion of loading of the lancet assembly) showing a lancet assembly having a preferred form related to prevention of needle exposure due to half-missing of the lancet. FIG. 42 is a cross-sectional view (withdrawing the lancet after completion of loading of the lancet assembly) showing a lancet assembly having a preferred form related to prevention of needle exposure due to lancet half-missing. FIG. 43 is a cross-sectional view (withdrawing the lancet after completion of loading of the lancet assembly) showing a lancet assembly having a preferred form related to prevention of needle exposure due to lancet half slipping. FIG. 44 is a cross-sectional view (after being pulled out of the injector / before removing the cap) showing a lancet assembly having a preferred form related to preventing needle exposure due to lancet half slipping. FIG. 45 is a cross-sectional view (after being pulled out of the injector / after removing the cap) showing a lancet assembly having a preferred configuration related to preventing needle exposure due to half-missing lancet. 46 (a) to 46 (e) are cross-sectional views showing a puncture device according to a preferred injector configuration related to prevention of needle exposure. FIG. 47 is a perspective view showing the appearance of the lancet assembly (prior art). FIG. 48 is a perspective view showing the appearance of an injector (prior art). FIG. 49 is a perspective view showing the appearance of a lancet (prior art). FIG. 50 is a perspective view when the lancet of FIG. 49 is divided in half so that the inside of the lancet can be seen (prior art). FIG. 51 is a perspective view showing a state before the lancet assembly is loaded into the injector (prior art). FIG. 52 is a perspective view showing a state in which the lancet is gripped by the tip of the plunger by loading the lancet assembly (prior art). FIG. 53 is a perspective view showing a state in which the lancet assembly is completely loaded and the plunger cannot be retracted (prior art). FIG. 54 is a perspective view showing a state in which the lancet cap is removed and puncture is possible (prior art).

The present invention will be described with reference to the accompanying drawings. The present invention relates to an injector, a lancet assembly and a puncture device. First, the configuration of the puncture device will be described, and then the injector and lancet assembly will be described. Since the puncture device is composed of an injector and a lancet assembly, detailed description of the puncture device itself will be made substantially as a description of each of the injector and the lancet assembly.

As described above, the terminology used in the present specification is that, as described above, the “puncture direction” in which the plunger of the injector or the lancet body of the lancet assembly moves during puncture is the “front” direction, and the opposite direction is “rear”. The direction. In the injector, the direction from the gripping part of the ejector to the casing opening corresponds to the “front direction” / “puncture direction”. In the lancet assembly, the direction from the opening end of the case to the puncture opening is “forward direction”. / Corresponds to “Puncture direction”. Further, the “transverse direction” substantially means a direction orthogonal to the puncturing direction. The directions used in the text of the specification are shown in the drawings.

<< Overall configuration and usage of puncture device >>

(Overall configuration of puncture device)
FIG. 1 shows a lancing device 1000. As shown in FIG. 1, a puncture device 1000 according to the present invention includes a lancet assembly 100 and an injector 200.

The lancet assembly 100 is a member provided with a puncture needle and used for actual puncture. The lancet assembly 100 includes a lancet 130 having a puncture needle and a holder 170 in which the lancet is accommodated (see FIG. 2). The “assembly” in the “lancet assembly” is used in view of the fact that the lancet and the holder are combined with each other.

The injector 200 is a member having a launch function and is used together with the lancet assembly. That is, by using the injector 200, it is possible to fire a “lancet with a puncture needle” to a place to be punctured. The injector 200 includes at least a plunger 220 that fires the lancet in the puncturing direction, and an injector casing 210 that contains the plunger (see FIGS. 1 and 3).

(Usage configuration of puncture device)
When using the puncture device, as shown in FIGS. 4 and 5, first, an operation of loading the lancet assembly 100 into the injector 200 is performed. The loading is performed by fitting the lancet assembly 100 into the front end opening 201 of the injector 200 as shown in the figure. Specifically, the lancet assembly 100 is inserted into the injector 200 so that the holder 170 of the lancet assembly 100 is partially fitted into the lancet assembly receiving member 202 of the injector 200. During such loading, the lancet will engage the plunger 220 of the injector. Also, prior to or in conjunction with such engagement, the lancet will abut against the plunger 220, but since the lancet is pushed into the injector, the plunger will retract within the injector. Specifically, when the insertion of the lancet assembly proceeds, the lancet body 140 (see FIG. 2) held and fixed to the holder 170 presses the plunger 220, and the plunger 220 moves backward. As shown in FIGS. 4 and 5, the plunger 220 is provided with a fire spring 220a. In particular, in the present invention, a fire spring 220 a is disposed inside the body cylinder portion 221 of the plunger 220. The retraction of the plunger 220 means that the plunger 220 is pushed down against the force of the fire spring 220a. Therefore, the plunger spring 220a is preferably compressed, and the force necessary for firing the lancet is stored in the plunger 220. Eventually, as shown in FIG. 5, the plunger is retracted until the trigger protrusion 220b of the plunger 220 is engaged with the rear protrusion 230a of the trigger lever 230 and a cocking state is obtained. . The trigger lever 230 is a member for causing the lancet to fire with respect to the lancet assembly loaded in the injector. In the lancet assembly before or during loading, the lancet (particularly the lancet body) is held and fixed to the holder due to the engagement between the lancet and the holder. Since the engagement is released, the lancet body including the puncture needle is movable with respect to the holder. That is, it can be fired in the puncture direction.

When the lancet assembly has been loaded into the injector, the lancet cap 150 is then removed as shown in FIG. At the time of puncturing, the front end of the lancet assembly is applied to a predetermined site (for example, fingertip) to be punctured, and then the tip end portion 230b of the trigger lever is pushed toward the inside of the injector (see FIG. 7). As a result, the cocking state between the rear protrusion 230a of the trigger lever 230 and the protrusion 220b of the plunger 220 is released. As a result, the compressed spring 220a extends instantaneously, and the plunger 220 moves forward. And fired. That is, the “lancet body having a puncture needle” attached to the plunger 220 is fired in the front puncture direction, and puncture is performed. FIG. 7 shows an aspect in which puncture is performed by pushing the front end portion 230b of the trigger lever toward the inside of the injector 200, that is, an aspect when the puncture needle 143 is exposed from the front end of the lancet assembly.

Hereinafter, the injector 200 and the lancet assembly 100 constituting the puncture device 1000 will be described in detail.

<Overall configuration and function of the injector>
8 to 10 show an injector 200 according to the present invention. FIG. 8 shows the appearance of the injector 200, and FIGS. 9 and 10 show the internal structure of the injector 200 and the main components of the injector 200. Specifically, in FIGS. 9 and 10, “plunger 220”, “cylindrical member 240 of puncture depth adjusting mechanism”, “spring member 250 of puncture depth adjusting mechanism”, “lancet of lancet assembly holding mechanism” “Assembly receiving member 202”, “lancer assembly holding mechanism holder clamping member 260”, “ejector 270”, and the like are shown.

The casing 210 of the injector 200 is a member that includes various components of the injector including the plunger 220 as shown in FIGS. 9 and 10. The injector casing 210 is preferably made of a resin material. Further, the injector casing 210 may be composed of, for example, two sub-members, and may be a combination of them. The casing 210 may be provided with leg protrusions 218 that function as legs as shown in FIG. When the leg protrusion 218 is provided, the injector 200 can be stably installed as a whole (more specifically, the injector 200 is stable in a substantially horizontal state so that the leg protrusion 218 contacts the installation surface. You can leave it at

The plunger 220 is disposed along the axial direction of the injector 200, that is, the longitudinal direction of the injector, and has a function of firing a lancet (particularly, a lancet body) in the puncture direction. As shown in FIG. 10, the distal end portion 222 of the plunger 220 can be engaged with the rear end portion 145 (see FIG. 2) of the lancet body 140. When the lancet assembly 100 is loaded into the injector 200, the distal end portion 222 of the plunger 220 and the rear end portion 145 of the lancet body 140 are engaged. Further, when the lancet body 140 is inserted rearward along with the loading, the plunger 220 is pushed rearward (see FIGS. 17 and 18). As a result, the fire spring 220a of the plunger 220 is compressed, and the force necessary for firing the puncture needle is stored in the plunger 220.

(Puncture depth adjustment mechanism)
The injector 200 of the present invention has a “puncture depth adjusting mechanism”. Such a puncture depth adjusting mechanism is provided inside the injector. Members contributing to the puncture depth adjusting mechanism are mainly “plunger protrusion 225”, “cylindrical member 240”, and “spring member 250” (see FIGS. 9 and 10).

The protruding portion 225 of the plunger is provided on the plunger 220 and protrudes outward from the plunger 200 in the transverse direction. The protruding portion 225 cooperates with the cylindrical member 240 at the time of puncturing. For example, as shown in FIG. 10, the protrusion 225 preferably has a flat front end surface, and the normal line of the front end surface is the axial direction of the injector (ie, the longitudinal axis of the injector). It is preferable that it is substantially parallel.

The cylindrical member 240 includes an uneven portion 242 and a step portion 246, as shown in FIG. As shown in the drawing, the uneven portion 242 is preferably provided in an end region of the outer peripheral surface of the cylindrical member 240. Moreover, it is preferable that the uneven | corrugated | grooved part 242 has a form which continued periodically along the circumferential direction of a cylindrical member. On the other hand, the step portion 246 is preferably provided on the inner peripheral surface of the cylindrical member 240. Since the step portion 246 is provided on the inner peripheral surface of the cylindrical member 240, it is indicated by a dotted line in the lower perspective view of FIG. Such uneven portions 242 and / or step portions 246 may constitute separate parts from the cylindrical member 240 or may be integrated with the cylindrical member 240 (“integrated”). In this case, the uneven portion 242 and / or the step portion 246 may be integrally formed when the cylindrical member 240 is formed, that is, the shape of the outer peripheral surface and / or inner peripheral surface of the cylindrical member 240 itself. , And may have the form of an uneven portion 242 and / or a step portion 246). The plunger 220 is installed through the cylindrical member 240 so that the protruding portion 225 is positioned inside the cylindrical member 240 and behind the step portion 246.

As shown in FIGS. 9 to 11, the spring member 250 is provided side by side with the cylindrical member 240 along the axial direction of the injector (ie, the longitudinal axis of the injector). That is, the spring member 250 and the cylindrical member 240 are disposed adjacent to each other along the longitudinal direction of the injector. It can be said that the spring member 250 is provided in the injector casing so that the spring expansion and contraction is expressed in the axial direction of the injector (that is, the longitudinal direction of the injector). The spring member 250 may be a coil spring, for example, as illustrated.

In such a puncture adjusting mechanism, when the plunger 220 moves forward at the time of puncture, the protruding portion 225 of the plunger moves in the “A direction” (puncture direction) as shown in FIG. By finally colliding with the step portion 246, the plunger 220 cannot move further forward. As a result, the cylindrical member 240 is rotated about its axis, and the step portion 246 that the projecting portion 225 collides with is changed to a step portion having a different height (for example, change from the step portion 246a to 246b). Thus, the distance that the plunger 220 can move forward during puncturing can be changed. That is, the puncture depth can be adjusted.

The concavo-convex portion 242 of the cylindrical member is configured such that the normal lines of the concavo-convex surfaces (242a, 242b, 242c,...) Are substantially parallel to the axial direction of the injector (see FIG. 9). The injector casing 210 is provided with a complementary shape portion 215 having a shape complementary to a part of the uneven portion 242. FIG. 9 clearly shows the complementary shape portion 215 provided on the inner wall surface of the injector casing. The complementary shape portion 215 may be formed by integral molding with the inner wall surface of the injector casing (that is, a part of the inner wall surface of the injector casing has a shape complementary to a part of the uneven portion 242. May have). In the injector puncture depth adjusting mechanism according to the present invention, the pressing state provided by the spring member 250 maintains the contact state between a part of the concave and convex portion 242 of the cylindrical member and the complementary shape portion 215 of the injector casing. ing. As shown in FIG. 13, a spring member 250 is provided adjacent to the cylindrical member 240 on the rear end side of the cylindrical member 240, and the cylindrical member 240 is urged forward. is there. Therefore, the concavo-convex portion 242 provided at the front end of the cylindrical member 240 is pressed against the complementary shape portion 215 of the injector casing 210.

When the puncture depth is adjusted by rotating the cylindrical member, as shown in FIG. 13, a part 242a of the concave / convex part 242 of the cylindrical member contacting the complementary shape part 215 of the injector casing is replaced with another part 242b. It will change to. Even during such a change, the cylindrical member 240 is still urged forward due to the spring member 250, so that the complementary shape portion 215 and the other portion 242b fit together vigorously. As a result, a “click feeling” is generated. That is, when the cylindrical member is turned with the fingertip to adjust the puncture depth, a suitable click feeling is provided to the user.

From the viewpoint of the spring member 250, the form of the spring member 250 temporarily changes when the puncture depth is adjusted. Specifically, the spring member 250 temporarily contracts when a part 242a of the concavo-convex part 242 that contacts the complementary shape part 215 of the injector casing changes to another part 242b. That is, as shown in FIG. 13, after the “contact state between the complementary shape portion 215 and the uneven portion 242a” is released, the next “complementary shape portion 215 and another portion 242b of the uneven portion are formed. When switching to the “contact state”, the spring member 250 once contracts and then returns to its original form.

In the puncture adjusting mechanism according to the present invention, an “adjustment dial” that is more easily understood by the user is provided. This will be described in detail.

As shown in FIG. 14, the cylindrical member 240 is provided with a scale value 248 along the circumferential direction, while the injector casing is provided with a scale opening window 216 for exposing the scale value of the cylindrical member. Yes. As shown in the drawing, the scale value 248 of the cylindrical member is composed of a first value sequence 248a and a second value sequence 248b that are adjacent to each other. Correspondingly, the scale window 216 of the injector casing is composed of a first opening window 216a and a second opening window 216b. More specifically, the scale opening window 216 is composed of a first opening window 216a and a second opening window 216b which are provided in pairs on opposite sides of the injector casing.

The first numerical value sequence 248a and the second numerical value sequence 248b are suitably combined with the first opening window 216a and the second opening window 216b. Specifically, as shown, the individual numbers in the first numeric column 248a of the cylindrical member 240 are exposed from the first opening window 216a of the injector casing and the individual numbers in the second numeric column 248b of the cylindrical member 240 are exposed. The numbers are exposed from the second opening window 216b.

In such an adjustment dial, the first numerical value column 248a displayed from the first opening window 216a and the first numerical value column 248b displayed from the second opening window 216b are independent from each other. In this regard, in the conventional injector, the scale value is provided in a single row, and it is displayed from "two open windows provided in pairs on opposite sides of the injector casing". In that respect, it was never preferred. Specifically, in the prior art, it is difficult to adjust the arrangement of the numbers exposed from one opening window and the numbers exposed from the other opening window, and the relative positions of the paired opening windows are not necessarily suitable. There wasn't. For example, while one opening window can be provided at the center of the body, the other opening window needs to be provided by being shifted to the upper side or the lower side from the center part of the body. In the adjustment dial according to the present invention, the first numerical value column 248a displayed from the first opening window 216a and the first numerical value column 248b displayed from the second opening window 216b are independent from each other. Has been avoided. In addition, since the numerical sequence is divided and displayed in the first place, the numerical value of each numerical sequence can be enlarged, and an injector that can be easily viewed by the user can be provided. In other words, although the present invention is a compact injector, the numerical display of the adjustment dial is not smaller than necessary, and a user-friendly injector is provided.

(Lancet assembly holding mechanism)
The injector of the present invention has a “lancet assembly holding mechanism”. Such a mechanism is a mechanism that suitably holds the holder of the lancet assembly that is loaded into or loaded onto the injector with respect to the injector. The members contributing to the lancet assembly holding mechanism are mainly “lancet assembly receiving member 202” and “holder holding member 260” (see FIG. 9).

As shown in FIG. 9, the lancet assembly receiving member 202 is provided at the front end opening of the injector, and receives the lancet assembly inserted during use. In other words, the lancet assembly can be loaded into the injector so that a part of the lancet holder 170 fits in the receiving member 202 (see FIGS. 4 and 5). As illustrated, the lancet assembly receiving member 202 preferably has a cylindrical shape as a whole.

As shown in FIG. 15, the lancet assembly receiving member 202 is preferably provided with a circumferential groove 202a on the outer surface of the body and a notch 202b in the groove region. As illustrated, the notch 202b may have an opening shape.

The holder clamping member 260 is attached to the lancet assembly receiving member 202 as shown in FIGS. The holder clamping member 260 is preferably a member made of metal such as SUS. The holder clamping member 260 is a member that can exhibit elastic characteristics. In particular, in the state provided in the injector, the holder clamping member 260 is preferably a member that can be elastically deformed in the direction outside and inside the injector (for example, in the direction shown in FIG. It is preferable that a force to return to the original shape in the opposite direction when it spreads to the holder clamping member 260).

Also, as shown in the drawing, the overall shape of the holder clamping member 260 may be a substantially ring shape, for example, a partially cut ring shape. Such a “partially cut ring-shaped holder holding member 260” is particularly easily elastically deformed with the “partially cut part” as a base point.

Particularly, as shown in FIG. 15, the holder holding member 260 has a locally curved portion 265 that is partially bent or bent inward. As shown in the figure, the local bending portion 265 may be provided with two local bending portions (265a, 265b) so as to form a pair with each other. The number of such local curved portions 265 is not particularly limited to two, and may be one, or may be three or more.

As shown in FIG. 15, it is preferable that at least a part of the inner side surface of the local curved portion 265 has a dome shape (or “hemispherical shape”). More specifically, it is preferable that a part of the inner side surface of the local curved portion 265 (reference numeral 265 ′ in FIG. 15) is locally raised inward, and the raised portion is continuously and smoothly curved. It is preferable that the curved surface is formed.

As shown in FIGS. 9 and 15, the holder clamping member 260 is attached to the outside of the lancet assembly receiving member 202 as a whole so as to be in close contact with the outer peripheral surface of the lancet assembly receiving member 202. More specifically, the holder holding member 260 is preferably provided so as to be fitted into the circumferential groove 202a of the holder holding member 260. Here, the local bending portion 265 of the holder holding member 260 is provided so as to be positioned in the notch opening 202 b of the lancet assembly receiving member 202. Therefore, on the inner peripheral surface of the lancet assembly receiving member 202, the local curved portion 265 of the holder holding member 260 is formed from the notch 202b of the lancet assembly receiving member 202 (for example, a notch having an opening shape as shown in FIG. 15). Exposed.

As shown in FIG. 16A, it is preferable that the local bending portion 265 of the holder holding member 260 is positioned slightly inside the inner surface of the lancet assembly receiving member 202. More specifically, it is preferable that the top of the dome-shaped portion 265 ′ of the local curved portion 265 is positioned at least inside the inner surface of the assembly receiving member 202.

FIG. 16B shows a state in which the lancet assembly holder 170 is inserted into the lancet assembly receiving member 202. As can be seen from FIG. 16B, the holder 170 inserted into or inserted into the lancet assembly receiving member 202 is clamped by the holder clamping member 260 with the local curved portion 265 as a base point. More specifically, when the dome-shaped portion 265a of the local bending portion 265 is in contact with the outer peripheral surface of the holder 170, the holder holding member 260 is slightly expanded outward, and the “holder holding member generated thereby” The holder 170 is preferably held by the “elastic force”.

For example, when the lancet assembly holder is pressed against the puncture site and the puncture is performed, the holder is prevented from being tilted with respect to the injector (particularly, the “lancet assembly receiving member”). And a desired puncture can be provided. In addition, since the holder clamping member is made of metal in the first place, it is difficult to wear due to repeated use, and a decrease in holding force is suitably prevented.

Incidentally, due to the dome-shaped portion 265 ′, the contact between the local curved portion 265 and the outer peripheral surface of the holder 170 is “point contact”, so that excessive resistance to insertion of the holder 170 does not occur. It has become. That is, in the lancet assembly holding mechanism according to the present invention, the holder 170 to be inserted into the injector is preferably held by the lancet assembly receiving member 202 (for such holding, the “friction between the holder 170 and the holding member” The resistance "contributes effectively), but even in an embodiment that produces such frictional resistance, smooth holder insertion is appropriately ensured.

(Mechanism related to ejector)
Next, the “mechanism related to the ejector” of the injector according to the present invention will be described with reference to FIGS. FIGS. 17 to 23 show over time from the loading operation of the lancet assembly 100 to the completion of loading, puncturing, and discharging of the lancet assembly 100 after puncturing. That is, FIGS. 17 to 23 show changes over time of the lancet assembly 100 and the injector 200 (that is, a puncture device composed of them) in the order of their numbers.

The injector of the present invention has an ejector 270 (see FIG. 10). The ejector 270 is essentially used to eject the “used lancet assembly”, that is, to eject the “lancet assembly already subjected to the puncture process” from the injector.

FIG. 22 shows the lancet assembly 100 and the injector 200 after puncturing. As can be seen from the illustrated embodiment, the ejector 270 is disposed so that the front end portion 272 of the ejector 270 can come into contact with the rear end of the holder 170 of the lancet assembly 100. Therefore, by moving the ejector forward, the holder 170 is pressed from the rear by the ejector 270. As shown in FIG. 23, when the ejector is driven, the lancet assembly 100 is moved forward so as to move away from the injector. Therefore, the used lancet assembly 100 is finally discharged from the injector.

In the injector of the present invention, the ejector 270 functions not only for discharging the lancet assembly 100 but also for loading the lancet assembly 100. Specifically, the ejector 270 also plays a role of giving a “click feeling” indicating completion of loading (more specifically, completion of engagement between the lancet and the plunger) when the lancet assembly 100 is loaded.

A portion that particularly contributes to providing a “click feeling” suggesting completion of the loading is an elastic portion 275 (see FIGS. 10 and 17) provided in the ejector 270. The elastic portion 275 cooperates with the protrusion 212 (see FIG. 17) provided on the inner wall surface of the injector casing 210, so that a “click feeling” indicating completion of loading is provided. This will be described in detail below.

When the lancet assembly is loaded into the injector to engage the lancet and the plunger, the ejector 270 is pushed inside the injector due to the ejector 270 being pushed backward by the holder 170 of the lancet assembly 100. Move backwards. Specifically, the rear end of the holder 170 of the lancet assembly to be loaded comes into contact with the front end of the ejector 270. As a result, the ejector is pushed backward and moved with the contact portion as a base point. Thus, when the ejector 270 moves rearward, the elastic portion 275 of the ejector 270 once comes into contact with the protrusion 212 of the injector and then gets over the protrusion 212. When overcoming this, the rearward movement of the ejector is once blocked and then released instantly, so the user (the user who picks up the holder 170 and inserts it into the injector) has a “click feeling”. Brought about.

In particular, when the elastic portion 275 of the ejector gets over the protrusion 212 of the injector, the lancet and the plunger are completely engaged, and the holder 170 of the lancet assembly 100 is finally received in the lancet assembly receiving member 202. Thus, the loading is substantially completed. In other words, “occurrence of click feeling” and “completion of engagement between lancet and plunger” / “completion of loading” are linked with each other. It is possible to grasp the completion of loading more clearly.

FIG. 18 shows a state immediately before the elastic portion 275 of the ejector rides over the protrusion 212 of the injector, whereas FIG. 19 shows a state immediately after the elastic portion 275 of the ejector gets over the protrusion 212 of the injector. Is shown. As can be seen from FIGS. 18 and 19, the lancet (especially the lancet body 140) and the plunger (especially the tip 222 thereof) are completely engaged when the elastic portion 275 gets over the protrusion 212, The holder 170 of the lancet assembly 100 is finally received in the lancet assembly receiving member 202, and the loading is substantially completed.

In addition, when the ejector has a long shape, for example, it is preferable that an elastic portion 275 is provided at the tip of the long ejector (see FIG. 10). Moreover, it is preferable that the elastic part 275 has the branch form extended back so that it may branch from an ejector body (refer FIG. 10). Since the elastic characteristics can be suitably expressed by these, the ejector can preferably play a role of giving a “click feeling” when the lancet assembly is loaded.

In the present invention, the ejector 270 also serves as an indicator mechanism indicating that the lancet assembly has been loaded into the injector. Specifically, the ejector 270 has an indicator window 276 at the rear end thereof, so that the indicator display 227 provided at the rear end of the plunger 220 is exposed (see FIG. 10).

More specifically, when the lancet assembly 100 is loaded into the injector 200, the trigger protrusion 220b of the plunger 220 is engaged with the rear protrusion 230a of the trigger lever 230 so that a cocking state is obtained. The indicator display part 227 of the jar 220 is appropriately exposed from the indicator window part 276 of the ejector 270 (see FIGS. 5 and 20).

That is, the loading state of the lancet assembly can be indirectly grasped from the exposed state of the indicator display portion 227 of the plunger 220, and as a result, it can be grasped whether or not the loading is completed.

Furthermore, in the injector of the present invention, the ejector 270 not only serves for “discharge of the lancet assembly” and “generation of a click feeling when the lancet assembly is loaded”, but also has a function related to “recharging”.

The mode of “recharging” is shown in FIGS. 24 (A) to 24 (C). FIG. 24A shows lancet assembly 100 and injector 200 after puncturing. FIG. 24B shows a mode in which the ejector 270 is moved rearward relative to the injector casing 210 to “recharge”, and FIG. 24C shows “recharge”. The mode at the time when is completed is shown.

In the ejector 270, a portion that contributes to recharging is a plunger retreat contact portion 277 (see FIGS. 24A and 24B). As shown in the drawing, the plunger retreat contact portion 277 preferably has a step shape. More specifically, the plunger retreating contact portion 277 is in the “tip portion 272 of the ejector protruding form” that comes into contact with the rear end of the holder when the “used lancet assembly” is discharged. The rear end portion is preferably formed (see FIG. 10 and FIGS. 24A and 24B).

On the other hand, in the plunger 220, a portion that contributes to recharging is the body cylinder portion 221. That is, it is the trunk cylinder part 221 in which the fire spring 220a is installed. In particular, it is the front edge portion 221A of the trunk cylinder portion 221 (see FIGS. 10 and 24A).

After the puncture, when the ejector 270 is moved backward, the plunger retracting contact portion 277 of the ejector 270 contacts the plunger 220. More specifically, the plunger retracting contact portion 277 of the ejector contacts the front edge portion 221A of the plunger barrel portion 221 (see FIGS. 24A and 24B). Therefore, if the rearward movement of the ejector is continued, the plunger 220 is retracted due to the pressing force received from the ejector 270, and finally, as shown in FIG. The trigger protrusion 220b can be re-engaged with the rear protrusion 230a of the trigger lever 230 to obtain the cocking state again. That is, the “recharge” is completed, and a puncturable state can be obtained again.

<Overall configuration and function of lancet assembly>
FIGS. 25-28 and 2 show the lancet assembly 100. FIG. 25 shows an external view of the lancet assembly 100, and FIG. 26 shows the lancet holder in a half cut along the longitudinal direction so that the internal structure of the lancet assembly 100 can be easily understood. FIG. 27 shows a cross-sectional view of the lancet 130 (with the cap removed). FIG. 28 shows a cross-sectional view taken along line II ′ of FIG. Further, an exploded view and an exploded view of the assembly are shown in FIG. 2 so that the components of the lancet assembly 100 can be easily understood.

26 and 2, the lancet assembly 100 has a structure in which the lancet 130 is accommodated in the holder 170. In other words, the lancet assembly 100 of the present invention is substantially composed of “lancet 130” and “holder 170” and two parts.

Specifically, as shown in FIG. 26 and FIG. 2, the lancet 130 is accommodated in the holder 170 without the needle tip protecting portion 152 and the lancet body 140 of the lancet cap 150 protruding from the holder 170.

Hereinafter, each component of the lancet assembly 100 will be described.

(holder)
As shown in FIGS. 25 and 2, the lancet assembly holder 170 has, for example, a cylindrical shape as a whole. The size of the holder 170 is small, and as shown in FIG. 4, the holder 170 has a size that can be picked up with a finger as a whole. The shape of the holder 170 is not necessarily limited to a cylindrical shape, and may be, for example, a rectangular tube shape.

The holder 170 may be formed of any kind of resin material as long as it is a resin material used for a general lancet. The holder 170 has an opening rear end 171 and a puncture opening end 172 at a position facing it (see FIG. 2). The puncture opening end 172 corresponds to a portion applied to a predetermined part (for example, a fingertip) to be punctured.

As shown in FIGS. 25 and 2, a raised portion 173 is provided on the outer surface of the holder. Preferably, the plurality of raised portions 173 are provided in an annular shape so as to be arranged in the circumferential direction of the holder body portion. The plurality of ridges 173 will engage the guide ridges (reference number 202c in FIG. 15) of the injector lancet assembly receiving member 202 when the holder is inserted into the injector, thereby enabling smooth insertion. Is realized.

Also, as shown in FIG. 25 and FIG. 2, in the lancet assembly 100 of the present invention, an opening (partially cutout opening or the like) is not provided in the body of the holder 170. On the inner wall of the holder 170, a stepped portion 174 is provided for preventing the body portion of the lancet from moving forward (see particularly FIG. 26). As shown in the drawing, the surface 174A formed by the stepped portion 174 has a shape facing the rear side so that the normal line thereof is substantially parallel to the axis of the holder. The holder inner wall is also provided with a locking portion 175 (see particularly FIG. 26). Such a locking portion 175 serves to prevent the rearward movement of the body portion of the lancet before use, and also serves to prevent the forward movement of the lancet body 140 after use. As shown in the figure, it is preferable that the locking portion 175 has a form protruding rearward toward the inner center of the injector.

(Lancet)
The lancet 130 is combined with the holder 170. The lancet 130 is also as small as the holder 170 and has a body size that can fit within the holder 170. As illustrated, the lancet 130 includes a lancet body 140, a lancet cap 150, and a puncture needle 143. The puncture needle 143 exists in the lancet body 140 and the lancet cap 150 made of resin, as shown in FIGS. 26 and 27, and the tip 143a of the puncture needle 143 is formed by the lancet cap 150. Covered. For this reason, for example, the puncture needle 143 does not appear in FIG. As shown in FIGS. 26 and 2, the lancet cap 150 and the lancet body 140 are coupled together through a slight contact. Such a lancet 130 can be manufactured by so-called insert molding in which a puncture needle is inserted into a mold and a resin (for example, polyethylene, polypropylene, etc.) is molded, and a “slight contact” (that is, “connecting portion”) is In addition, it can be manufactured together with this insert molding. Accordingly, the “slight contact” can be formed from the same resin material as the lancet cap 150 and the lancet body 140.

The lancet cap 150 includes a “needle tip protecting portion 152 that protects the puncture needle”, “a cap head portion 154 that is coupled to the needle tip protecting portion and is positioned in the foremost position on the lancet cap”, and , And a pair of rearward extending portions 156 ”extending rearward from the cap head portion.

The lancet body 140 is provided in a state of being temporarily held with respect to the holder 170, and the lancet body 140 includes an element for that purpose. Specifically, the lancet body 140 includes a pair of flexible protrusions 142 and a pair of bent shape variable positions 144. The pair of flexible protrusions 142 is provided on the front side of the lancet body, whereas the pair of bent shape variable positions 144 is provided on the rear side of the lancet body. As shown in FIG. 26, the flexible protrusion 142 engages with the locking portion 175 of the inner wall of the holder, and the bent shape variable position portion 144 (particularly, the bent portion 144A) becomes the stepped portion 174 ( In particular, the lancet body 140 is temporarily held with respect to the holder 170 by engaging with the step surface 174A). The former engagement mainly prevents relative movement of the lancet body relative to the holder 170, while the latter engagement mainly prevents relative movement of the lancet body relative to the holder 170. . In use, when the loading of the lancet assembly into the injector is completed, the bent shape variable position portion 144 is displaced inward due to the balance and contact with the front end portion 222 of the plunger member. Therefore (see FIG. 18 and FIG. 19), the lancet body can move forward, and thus can be fired.

In the lancet body 140, the body of the puncture needle 143 is fixed. Therefore, when puncturing, the lancet body 140 is fired forward together with the puncture needle 143. In addition, the lancet body 140 has an engaging portion 145 for engaging with a mounting portion (reference number 222 in FIG. 10) of the injector plunger 220 at the rear end thereof. That is, when the lancet assembly is loaded into the injector, the rear end portion 145 of the lancet body can be engaged with the front end portion 222 of the plunger 220, whereby the plunger is retracted as the holder is inserted. Thus, the force necessary for firing the puncture member is stored in the plunger.

(Removing the lancet cap)
The lancet assembly 100 of the present invention has a pair of rearward extending portions 156 extending rearward from the cap head portion 154 (preferably the pair of rearward extending portions 156 have a symmetrical form. ) In particular, in the present invention, as shown in FIG. 26, the rearward extending portion 156 of the lancet cap extends on the outer side surface 170A of the body of the holder 170 along the outer side surface 170A in the longitudinal direction of the lancet. Thereby, it is possible to prevent the needle tip from being bent or broken when the cap is removed.

More specifically, when the lancet cap 150 is removed from the lancet 100, the rear extension 156 can be rotated so that the rear extension 156 of the lancet cap 150 slides on the outer surface 170A of the body of the holder. Thereby, the bending / breaking of the needle tip 143a of the puncture needle 143 can be suitably prevented. In other words, in the present invention, the rearward extension 156 is a gripping part (particularly “a gripping part for a user to grip when removing the lancet cap”), and therefore the rearward extension 156 thereof. The lancet cap is removed by rotating the rear extension 156 so as to slide on the outer surface 170A of the body of the holder. Since the rearward extension 156 is a gripping part, preferably a raised portion that extends along the width direction of the rearward extension (ie, a protrusion extending in a direction perpendicular to the lancet, not in the axial direction). Part) may be provided on the outer surface of the rear extension 156 (for example, the rear extension has an outer surface shape as shown in FIGS. 30C and 30D to be described later). May be). More preferably, the “plurality of raised portions extending along the width direction of the rearward extension” is close to the free end 156B of the rearward extension (position closer to the free end than the fixed end). May be provided.

Preferably, at least the central portion of the lancet cap's rearward extending portion (“the central portion 156 ′ along the width direction of the rearward extending portion”) is close to and / or in contact with the outer surface of the holder body. It extends in the longitudinal direction of the lancet along the outer surface of the holder body. See FIG. 2 for “center portion 156 ′”. More preferably, the inner surface 156A of the rearward extension 156 of the lancet cap and the outer surface 170A of the holder body are close to or in close contact with each other (see FIG. 26). Specifically, the inner surface 156A of the rear extension 156 may be in contact with the outer surface 170A of the holder body, or 0 mm (excluding “0”) to 2 mm, preferably 0 mm (“0”). The inner surface 156A of the rear extension 156 and the outer surface 170A of the holder body are positioned relative to each other with a slight gap of ˜1 mm, more preferably 0 mm (excluding “0”) to 0.5 mm. It may be. That is, the term “adjacent” here means a separation distance between the inner surface 156A of the rear extension 156 and the outer surface 170A of the holder body (in particular, “minimum separation distance between the inner surface 156A and the outer surface 170A). )) Is 0 mm (excluding “0”) to 2 mm, preferably 0 mm (excluding “0”) to 1 mm, more preferably 0 mm (excluding “0”) to 0.5 mm. Refers to an aspect. In one preferred embodiment, at least a portion of the inner surface of the central portion 156 'of the rearward extension of the lancet cap is in contact with the outer surface 170A of the holder body. It is also preferable that at least a part of the inner side surface 156A of the rearward extending portion 156 of the lancet cap and at least a part of the outer side surface 170A of the holder body have a complementary shape. For example, at least a part of the inner surface 156A in the central portion 156 ′ of the rearward extension portion of the lancet cap (more preferably, “all of the inner surface 156A in the central portion 156 ′”) is opposed to the outer surface 170A of the holder body. It is preferable that a part of each has a complementary form.

As shown in FIG. 26, the rearward extension 156 of the lancet cap has a form that extends rearward largely / longer. For example, the rear end 156B of the lancet cap rearward extension 156 is positioned so that the free end 156B is positioned rearward relative to the position of the needle tip 143a of the puncture needle 143 (or the position of the rear end 152A of the needle tip protector 152). An extending portion 156 extends rearward. Preferably, the rear extending portion 156 extends long until the free end 156B of the rear extending portion 156 reaches the lancet body 140 (in other words, the free end 156B of the rear extending portion is located above the lancet body 140). The elongated rearward extending portion 156 extends rearward from the cap head portion. More specifically, for example, the lancet holder 170 is provided with a narrowed portion whose diameter is reduced as a whole, and the free end 156B of the rearward extending portion is positioned on the narrowed portion (ie, the narrowed portion). The rearward extension 156 preferably extends (so that the free end 156B is positioned above).

Due to the various characteristic forms as described above, when the lancet cap is removed, the user holds only the rear extension 156 (that is, the rear extension 156 without holding the cap head 154). ), The rearward extending portion 156 can be slid more suitably with respect to the outer surface 170A of the body of the holder, and as a result, the bending / breaking of the needle tip 143a can be more preferably prevented.

In addition, as shown in FIG. 26, the rearward extension 156 of the lancet cap has a long shape, and preferably extends rearward so that the free end 156B extends outward. . Accordingly, the rear extension 156 can be suitably gripped when the cap is removed, and a smoother “sliding rotation” can be realized.

Note that the lancet assembly cannot be rotated about the axial center before loading into the injector, but can be rotated after loading into the injector is completed. This is related to the locally raised portion 152a in the tip region of the needle tip protector 152 (see FIGS. 26 and 2). Specifically, prior to loading into the injector, rotation is prevented by the local raised portion 152a of the needle tip protecting portion 152 of the lancet cap engaging with the inner wall surface of the holder (for example, a groove formed on the inner wall). Has been. On the other hand, after the loading of the injector is completed, the lancet cap is slightly moved forward with respect to the holder so that the engagement cannot be performed. Specifically, when the lancet assembly 100 is loaded into the injector 200, the trigger protrusion 220b of the plunger 220 is locked with the rear protrusion 230a of the trigger lever 230 as shown in FIGS. Immediately after the state is obtained, the lancet is pushed forward by being pushed by the plunger biased forward. As a result, the lancet moves slightly forward with respect to the holder, that is, the lancet cap moves slightly forward, and the local raised portion 152a of the needle tip protecting portion 152 of the lancet cap and the holder The engagement with the wall surface (for example, a groove formed in the inner wall) is released. Therefore, after the loading is finally completed, the lancet cap can be rotated about the axial direction.

(Safety function of used lancet assembly)
In the lancet assembly discharged from the injector after puncturing, the puncture needle is not exposed to the outside.

Specifically, when discharging the lancet assembly from the injector after puncturing, the ejector is moved forward to press the holder 170 of the lancet assembly 100 forward. As a result, as shown in FIGS. 22 and 23, the holder 170 moves forward relative to the lancet body 140 (that is, if the view is changed, the lancet body 140 moves relative to the holder 170). As a result, the flexible projection 142 of the lancet body and the locking portion 175 of the inner wall of the holder are engaged. Therefore, due to this engagement, the used lancet body 140 (that is, the lancet body 140 provided with the puncture needle) cannot move forward in the holder, and the puncture needle is exposed to the outside. There is nothing. Further, as shown in the drawing, since the distal end portion 146 of the lancet body can be used at the base area of the locking portion 175, the lancet body 140 cannot be moved backward in the holder 170.

The injector, lancet assembly and puncture device according to the present invention can be embodied in various suitable forms. This will be described below.

(Suitable form with lancet assembly receiving member and lancet holder)
The “plurality of guide bulges 202c of the lancet assembly receiving member 202” and the “plurality of bulges 173 on the outer surface of the lancet holder” may have a longer shape. Specifically, as shown in the lower side of FIG. 28, the “guide raised portion 202c ″ of the lancet assembly receiving member 202” may extend long on the inner surface of the lancet assembly receiving member 202, that is, the lancet assembly. The receiving member 202 may extend deeply from the open end toward the bottom. In other words, as shown in the lower side of FIG. 28, the guide groove 202d ″ formed by the adjacent guide ridge 202c ″ may extend deeper from the open end toward the bottom. Similarly, as shown on the lower side of FIG. 28, the raised portion 173 ″ of the lancet holder may extend long on the outer surface of the holder. In such a long form, when the holder is inserted into the injector, the “holder raised portion 173 ″” and the “receiving member guide raised portion 202c ″” are suitably engaged with each other, and more Desired insertion is achieved. In particular, the position of the lancet holder is easily determined immediately before the lancet and the plunger are engaged. As a result, the inconvenience that only the lancet holder rotates and the position is twisted immediately before the plunger grasps the lancet body is prevented.

(Preferable form with a needle tip protection part)
The needle tip protector 152 of the lancet cap may be configured as shown in the lower side of FIG. Specifically, the needle tip protecting portion 152 '' that protects the puncture needle may have a hollow portion 152b '' in the vicinity of the tip 143a of the puncture needle. As shown in the drawing, a hollow portion 152b ″ having a form that partially surrounds the periphery of the tip of the puncture needle from the front side may be provided in the needle tip protection portion 152 ″. Such a needle point protection part 152 '' can have a particularly advantageous effect when the lancet is manufactured. Specifically, when the lancet is molded (when the resin raw material is injected into the mold), the resin raw material flows as indicated by the dotted arrow in FIG. 29 to fill the mold, and the puncture needle This reduces the load on the tip of the wire. That is, the load that the tip of the puncture needle receives from the resin raw material during the formation of the lancet is reduced, and inconveniences such as bending of the needle tip are effectively prevented.

(Preferred form with lancet assembly)
The lancet assembly may have a form as shown in FIG. In the lancet assembly 100 shown in each of FIGS. 30A to 30H, when the lancet cap is removed, a rotation tearing operation (an operation of gripping the rearward extension 156 and rotating the cap around the center of the lancet in the axial direction) is performed. It has a form that is actively encouraged by the user. As can be seen from the illustrated embodiment, such “rotation cutting operation” may be promoted from the viewpoint of the visual effect given to the user, or may be prompted from the viewpoint of the operability of the user. May be.

For example, in the lancet assembly shown in FIG. 30A, the lancet cap (particularly, the rearward extending portion 156) has two outer curved surfaces 156M and 156N. Specifically, the two outer curved surfaces 156M and 156N extend along the longitudinal direction of the rearward extending portion. More specifically, the outer curved surface 156M and the outer curved surface 156N are provided adjacent to each other in a form in which their side end portions are shared. In the lancet assembly 100 of FIG. 30A, when the rearward extension 156 of the lancet cap is gripped with a fingertip, the lancet assembly 100 is moved in the “b direction” (ie, in the direction of pulling out the cap) (ie, in the direction of pulling out the cap). When the cap is moved in the axial direction, the resistance received by the fingertip increases. In other words, for the user, it is natural to move the rear extension 156 in the “b direction” (the direction in which the cap is rotated about the axial center), and therefore, “rotational cutting operation” is actively promoted. Is done.

FIGS. 31 to 33 respectively show an external perspective view, an external plan view, and an internal structure plan view of the lancet assembly 100 shown in FIG. 30 (A). Even the embodiment shown in FIG. 30 (A) (more precisely, the lancet assembly having FIG. 30 (A) and FIGS. 30 (B) to 30 (H) having a lancet cap similar to that of FIG. ), The rearward extending portion 156 of the lancet cap has a form extending largely rearward. In particular, as shown in FIG. 33, the free end / tip 156B of the rearward extension 156 of the lancet cap is relative to the position of the needle tip 143a of the puncture needle 143 (or the position of the rear end 152A of the needle tip protector 152). The rear extension 156 extends so as to be positioned rearward. Preferably, the rear extension 156 extends long and rearward until the free end 156B of the rear extension 156 reaches the lancet body 140 (in other words, the free end 156B of the rear extension 156B extends to the lancet body 140). An elongate rearward extending portion 156 extends rearward from the cap head portion so as to be positioned upward).

In particular, as shown in FIGS. 31 to 33, in the lancet assembly 100 of FIG. 30 (A), it is preferable that the holder 170 is provided with a circumferential raised portion 180. As will be described later, the circumferential raised portion 180 can have an advantageous effect in cooperation with the holder holding members (particularly, the sub holding members A and B) when the lancet assembly 100 is loaded into the injector 200.

(Preferable form with holder holding member, lancet assembly receiving member and lancet holder)
The holder clamping member is not limited to a single product, and may be composed of a plurality of parts. As shown in FIGS. 34 and 35, the holder clamping member 260 has a two-part configuration including, for example, a sub clamping member A (260A) and a sub clamping member B (260B). The clamping member B may be disposed to face the holding member B. The sub-clamping member A (260A) and the sub-clamping member B (260B) are members made of metal such as SUS, for example.

In the case of “two-part configuration”, it is preferable that each of the sub-clamping member A and the sub-clamping member B has a local curved portion. As shown in FIGS. 34 and 35, even in the case of the “two-part configuration”, it is preferable that local curved portions (265A, 265B) that are locally curved or bent inward are provided. As shown in the drawing, a part of the sub-clamping member A (260A) extends forward, and the front extending portion is curved or bent inward. That is, the local bending portion 265A of the sub clamping member A (260A) has a form that extends locally to the front side and is bent or bent inward in the injector. The same applies to the sub-clamping member B (260B), and the local bending portion 265B of the sub-clamping member B (260B) has a form that extends locally to the front side and is bent or bent inward in the injector. ing. Furthermore, it is preferable that at least a part of the inner side surface of the local bending portion has a dome shape, that is, as shown in the figure, the local bending portions (each of the sub clamping member A (260A) and the sub clamping member B (260B)). 265A, 265B) preferably has a dome-shaped portion (265A ′, 265B ′). This means that the holder contact surface of the holder clamping member has a substantially hemispherical shape.

When the holder clamping member 260 is composed of the sub clamping member A (260A) and the sub clamping member B (260B), the lancet assembly receiving member 202 is preferably composed of a plurality of sub members. As shown in FIG. 34, the lancet assembly receiving member 202 includes “sub-receiving member A (202A) positioned on the front side of the injector” and “sub-receiving member B (202B) positioned on the rear side of the injector”. Preferably, it has a two-part configuration consisting of In such a case, the sub-receiving member A (202A) preferably has a ring shape as a whole.

When the sub-clamping member A (260A) and the sub-clamping member B (260B) have local curved portions, when the lancet assembly is loaded into the injector, the local curved portions (265A, 265B) are the outer surfaces of the holders of the lancet assembly. It is preferable to contact the part. Further, the sub-clamping member A (260A) and the sub-clamping member B (260B) are each preferably attached to the outer surface of the lancet assembly receiving member, and particularly attached to the outer surface of the sub-receiving member B (202B). Preferably it is. The front end of the sub-receiving member B (202B) is provided with two notches formed by cutting out a part of the sub-receiving member B (202B), and the local curved portion is positioned with respect to the notches. It is preferable that the sub-clamping member A (260A) and the sub-clamping member B (260B) are provided as described above. In other words, when viewed from the inside of the lancet assembly receiving member, the local bending portions (265A, 265B) of the sub-holding member A (260A) and the sub-holding member B (260B) are notched portions of the lancet assembly receiving member. The holder holding member 260 and the lancet assembly receiving member 202 are combined with each other so as to be exposed from the above.

As shown in FIG. 34, the sub-receiving member A (202A) is provided with a pair of rear protrusions (202A ₁ , 202A ₂ ) protruding rearward. 202A ₁ , 202A ₂ ) is preferably positioned so as to cover the sub-clamping members A and B (260A, 260B). Specifically, one rear protrusion (202A ₁ ) is positioned so as to cover the sub-clamping member A (260A), and the other rear protrusion (202A ₂ ) covers the sub-clamping member B (260B). It is preferable that it is positioned. Thereby, the attachment / fixation of the sub-clamping member A (260A) and the sub-clamping member B (260B) to the sub-receiving member B (202B) becomes more reliable, and the clamping effect of the holder clamping member 260 is more suitably achieved. Will be.

The “holder clamping member 260” and the “lancet assembly receiving member 202” as shown in FIG. 34 and FIG. 35 are used in combination with the “lancet assembly 100” shown in FIGS. Is played. Particularly advantageous effects are obtained when the lancet assembly is loaded into the injector. This will be described in detail with reference to FIG. 36 and FIG.

FIG. 36 shows a state in which the lancet assembly 100 is completely loaded into the injector. As can be seen from the illustrated embodiment, in the puncture device that has been completely loaded, the circumferential raised portion 180 of the holder is positioned on the rear side of the dome-shaped portion (265A ', 265B') of the holder clamping member. This means that when the loading is completed, the circumferential raised portion 180 of the holder once makes contact with the dome-shaped portion (265A ′, 265B ′) and then gets over the dome-shaped portion (265A ′, 265B ′). (See also FIGS. 37A and 37B). Thus, when the circumferential raised portion 180 of the holder gets over the dome-shaped portion (265A ′, 265B ′) of the holder holding member, a suitable click feeling ”is provided to the user. “Click feeling” makes it possible to reliably grasp the completion of the loading of the lancet assembly.

(Suitable form related to prevention of needle exposure)
With reference to FIG. 38 to FIG. 45, “a preferred embodiment related to prevention of needle exposure” will be described. In particular, a “suitable lancet assembly configuration related to prevention of needle exposure due to lancet half-miss” will be described. In the lancet assembly having such a configuration, even if the lancet is unintentionally or accidentally urged forward, the lancet is prevented from falling out of the holder, and similarly unintentional when removing the lancet cap. Or even if the lancet is accidentally urged forward, the needle tip does not jump out of the holder.

In the lancet assembly 100 having such a configuration, the lancet body 140 includes the bent shape variable position portion 144, and the holder 170 includes the locked portion 190A for locking the bent shape variable position portion. The bent portion 144A of the positioning portion 144 is positioned so as to be locked to the locked portion 190A of the holder (see FIG. 39). As shown in FIGS. 38 and 39, the locked portion 190A may have an opening shape, and the bent portion 144A of the bent shape variable position portion 144 is locked to the holder wall portion that defines such an opening. It can be done.

When the lancet is unintentionally or accidentally biased forward with respect to the lancet assembly 100 in the state shown in FIG. 39, the bent portion 144A (particularly the outer surface portion) of the bent shape variable position portion as shown in FIG. Will be locked to the locked portion 190A of the holder, and as a result, the lancet will not fall out of the holder.

FIG. 41 shows a state in which the lancet assembly 100 is completely loaded into the injector 200. That is, in the embodiment shown in FIG. 41, the lancet body 140 and the plunger (particularly, the cylindrical mounting portion 222 at the tip thereof) are engaged with each other, whereby the loading of the lancet assembly 100 into the injector 200 is completed. If the lancet 100 is unwillingly or accidentally biased forward with respect to the lancet assembly 100 in the state shown in FIG. 41 (for example, when a force for pulling the lancet forward is applied when the lancet cap is removed), FIG. 42, the bent portion 144A (particularly the outer surface portion) of the bent shape variable position portion 144 is locked to the “further locked portion 190B” of the holder so that the lancet does not fall out of the holder. It has become. The “further locked portion 190B” may also have an opening shape similar to the locked portion 190A. Therefore, the bending shape variable position portion 144 is bent on the holder wall defining the opening. The portion 144A can be locked. In other words, even when the lancet is unintentionally or accidentally biased forward when the lancet cap is removed, the needle tip does not pop out of the holder (see also FIGS. 43 to 45). ).

(Another suitable form related to prevention of needle exposure)
Next, with reference to FIG. 46, “another preferred embodiment related to prevention of needle exposure” will be described. In particular, an injector suitably configured for such prevention will be described. In such an injector, at a stage after the lancet assembly has been completely loaded and before the lancet cap is removed (hereinafter also referred to as “stage before removing the cap after loading”), the injector is unintentionally or accidentally Even when the trigger lever has been operated, safety is suitably ensured.

Specifically, in the stage before the cap removal after the completion of loading, the trigger lever of the injector is pushed (that is, the trigger lever is pushed inwardly from the inside of the injector), and then the lancet assembly is removed from the injector. Even when the lancet assembly is pulled out, there is no risk of needle exposure in the lancet assembly. More specifically, in the lancet assembly pulled out as described above, even if the lancet cap is removed, the needle tip of the puncture member is not exposed to the outside.

The part that contributes to the puncture device that ensures such safety is a protrusion provided on the trigger lever 230 (a trigger member that causes the lancet to fire with the lancet assembly loaded in the injector). Specifically, it is a protrusion indicated by reference numeral 230c in FIG. The trigger lever is provided with a rear projection 230a for temporarily preventing the lancet assembly loaded in the injector from moving forward, and the trigger lever has a “further” position at the front side of the rear projection 230a. A protrusion 230c ″ is provided. As can be seen from the form shown in the drawing, it is preferable that the “further protrusion 230 c” is provided side by side and adjacent to the rear protrusion 230 a.

In this aspect, after the lancet and the plunger are engaged with each other and the lancet assembly is completely loaded into the injector, the trigger lever is operated before the lancet cap is removed, and the lancet assembly is Even when pulled out of the injector, the advancement of the plunger connected to the lancet is prevented by the “further protrusion 230c” of the trigger lever, resulting in the above safety.

It will be described in detail with reference to FIG. The lancet (especially the lancet body 140) and the plunger (especially the cylindrical mounting portion 222 at the tip thereof) are engaged with each other and the lancet assembly is fully loaded in the injector, that is, “cap removal after loading” In the “previous stage”, the trigger lever 230 is essentially operated after the lancet cap 150 is removed thereafter. However, the trigger lever 230 cannot be operated prior to the removal of the lancet cap 150 unintentionally or accidentally. When the trigger lever is operated prior to the removal of the lancet cap, the puncture device is in the state shown in FIG. Specifically, when the trigger lever tip 230b is pushed into the injector and the trigger lever is operated (see FIG. 7), the rear protrusion 230a of the trigger lever 230 and the protrusion 220b of the plunger 220 are operated. The cocking state with is released. Therefore, due to the release of the compressed state of the fire spring, the plunger 220 is positioned further forward, and the puncture device takes the form shown in FIG. 46 (a). When the lancet assembly 100 is pulled out from such a state, more specifically, when the lancet assembly 100 is pulled out from the injector 200, the plunger 220 engaged with the lancet 130 moves forward. . Although the plunger 220 moves forward, the trigger protrusion 220b provided on the plunger 220 is locked to the “further protrusion 230c”, so that the movement itself is immediately prevented (FIG. 46B). reference).

Subsequently, when the lancet assembly is continuously pulled out, the engagement between the lancet and the plunger is finally released. At this time, as shown in FIG. The bent portion 144A (particularly the outer surface portion) of the bent shape variable position portion 144 is locked to the “further locked portion 190B” of the holder. Specifically, when the engagement is released, the bent shape variable position portion 144 of the lancet partially accommodated in the cylindrical mounting portion 222 of the plunger comes out of the cylindrical mounting portion 222. The shape variable position part 144 returns to the original form. As a result, the bent portion 144A of the bent shape variable position portion 144 can be locked to the “further locked portion 190B” of the holder. In such a locked state, the position of the needle tip of the lancet is positioned at the same position as the tip of the lancet holder 170 or behind it. Therefore, in the lancet assembly 100 finally removed from the injector, even if the cap 150 is removed, the needle tip (that is, the needle tip 143a of the puncture needle) is not exposed from the holder 170 (FIG. 46 (d) and (Refer FIG.46 (e)).

It is added to confirm that the present invention described above has the following aspects.
First aspect : an injector for firing a lancet of a lancet assembly for puncture, comprising a plunger for firing the lancet in the puncture direction, and an injector casing containing the plunger,
The puncture depth adjustment mechanism of the injector
A protrusion protruding outward from the plunger in the transverse direction thereof,
It has a cylindrical member provided with an uneven part and a step part, and a spring member provided side by side with the cylindrical member along the axial direction of the injector,
The concave and convex portion is provided on the cylindrical member so that the normal of the surface forming the concave and convex portion is substantially parallel to the axial direction of the injector, while the complementary shape portion having a shape complementary to a part of the concave and convex portion is the injector Abutting between a part of the concavo-convex part of the cylindrical member and the complementary shape part of the injector casing is held by the pressing force provided from the spring member,
When the plunger moves forward at the time of puncturing, the plunger's protruding part collides with the step part of the cylindrical member, so that the plunger cannot move further forward, and the puncture depth In adjusting the position of the plunger, by rotating the cylindrical member about its axial center, the step portion where the protruding portion of the plunger collides can be changed to a step portion having a different height. An injector whose travel distance is changed.
Second aspect : In the first aspect, the concavo-convex portion of the cylindrical member has a form that is periodically continued along the circumferential direction of the cylindrical member,
An injector characterized in that, when the puncture depth is adjusted by rotating the cylindrical member, a part of the concavo-convex part of the cylindrical member that contacts the complementary shape part of the injector casing is changed to another part.
Third aspect : In the second aspect, the spring member temporarily contracts when a part of the concavo-convex part of the cylindrical member contacting the complementary shape part of the injector casing is changed to another part. Injector.
Fourth aspect : The injector according to any one of the first to third aspects, wherein the spring member is a coil spring.
Fifth aspect : In any one of the first to fourth aspects, the cylindrical member has a scale value along the circumferential direction, while the injector casing exposes the scale value of the cylindrical member. A scale opening window is provided,
The cylindrical member is composed of a first numerical value column and a second numerical value column that are adjacent to each other, and a first opening window provided on the opposite side surface of the injector casing, and a second opening. An injector comprising: an opening window, wherein numbers in the first numerical sequence are exposed from the first opening window, while numbers in the second numerical sequence are exposed from the second opening window.
Sixth aspect : In any one of the first to fifth aspects, the concavo-convex portion is provided in the end region of the outer peripheral surface of the cylindrical member, and the complementary shape portion is provided in the inner wall surface of the injector casing. An injector characterized by that.
Seventh aspect : In any one of the first to sixth aspects, the step portion is provided on the inner peripheral surface of the cylindrical member, and the plunger is positioned so that the protruding portion of the plunger is positioned inside the cylindrical member. An injector characterized by penetrating a cylindrical member.
Eighth aspect : An injector for firing a lancet of a lancet assembly for puncture, comprising a plunger for firing the lancet in the puncture direction, and an injector casing containing the plunger,
The injector lancet assembly holding mechanism
A lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly; and a metal holder holding member attached to the lancet assembly receiving member.
An injector in which the holder holding member holds the holder when the lancet assembly is loaded into the injector so that the holder of the lancet assembly is received in the lancet assembly receiving member.
Ninth aspect : The injector according to the eighth aspect, wherein the holder of the lancet assembly is clamped by the holder clamping member by the elastic force exhibited by the holder clamping member.
Tenth aspect : The injector according to the eighth aspect or the ninth aspect, wherein the entire shape of the holder holding member has a partially cut ring shape.
Eleventh aspect : In any one of the eighth to tenth aspects, the holder holding member has a two-part configuration including the sub-holding member A and the sub-holding member B. An injector characterized in that the member B is disposed to face the member B.
Twelfth aspect : In any one of the eighth to eleventh aspects, the holder clamping member has a local curved part (local bent part), a part of which is curved inward or bent.
An injector characterized in that when the lancet assembly is loaded into the injector, the local curved portion comes into contact with the outer surface of the holder of the lancet assembly (such as the outer peripheral surface of the holder and the circumferential ridge provided on the holder).
Thirteenth aspect : In the twelfth aspect, the holder holding member is attached so as to be in close contact with the outer peripheral surface of the lancet assembly receiving member.
An injector characterized in that, on the inner peripheral surface of the lancet assembly receiving member, a local curved portion of the holder holding member is exposed from a notch of the lancet assembly receiving member.
Fourteenth aspect : The injector according to any one of the eighth to thirteenth aspects, wherein at least a part of the inner side surface of the local curved portion has a dome shape (dome shape portion).
Fifteenth aspect : In any one of the twelfth to fourteenth aspects subordinate to the eleventh aspect, the lancet assembly receiving member is positioned on the front side of the injector and the sub receiving member A is positioned on the rear side of the injector. An injector characterized in that it has a two-part configuration consisting of a sub-receiving member B and the sub-receiving member A has a ring shape as a whole.
Sixteenth aspect : In the fifteenth aspect, the sub-receiving member A is provided with a pair of rearward protrusions protruding rearward, and the pair of rearward protrusions are on the sub-holding member A and the sub-holding member B. Injector characterized by being positioned to cover.
Seventeenth aspect : An injector for firing a lancet of a lancet assembly for puncture,
A plunger for firing the lancet in the puncture direction, an injector casing containing the plunger, and an ejector for discharging the lancet assembly loaded in the injector;
While the ejector is provided with an elastic part, a protrusion is provided on the inner wall surface of the injector casing. When the lancet assembly is loaded into the injector to engage the lancet and the plunger, the elastic part of the ejector Is an injector that once contacts the protrusion of the injector and then climbs over the protrusion.
Eighteenth aspect : The injector according to the seventeenth aspect, wherein the lancet and the plunger are completely engaged when the elastic portion of the ejector has passed over the protrusion of the injector.
Nineteenth aspect : The injector according to the seventeenth aspect or the eighteenth aspect, wherein the ejector has a long shape, and an elastic portion is provided at a tip of the long shape ejector.
Twenty aspect : The injector according to any one of the seventeenth to twentieth aspects, wherein the elastic portion has a branching shape extending rearward so as to branch from the ejector body.
Twenty-first aspect : An injector for firing a lancet of a lancet assembly for puncture,
A plunger for firing the lancet in the puncture direction, an injector casing containing the plunger, and an ejector for discharging the lancet assembly loaded in the injector;
The ejector is provided with a plunger retreating contact,
An injector in which when the ejector is moved backward after puncturing, the plunger retracting contact portion of the ejector contacts the plunger, whereby the plunger retracts due to the pressing force received from the ejector.
Twenty-second aspect : A lancet assembly including a lancet and a holder storing the lancet,
The lancet has a lancet body, a lancet cap and a puncture needle, and a metal puncture needle lies in the resin lancet body and the lancet cap, and the needle tip of the puncture needle is provided by the lancet cap. Covered,
The lancet cap
Needle tip protector that protects the puncture needle,
It has a cap head part that is connected to the needle point protection part and is positioned at the forefront of the lancet cap, and a pair of rear extension parts that are connected to the cap head part and extend backward from the cap head part. And
A lancet assembly in which a rearward extension of the lancet cap extends along the outer surface of the holder body.
Twenty-third aspect : In the twenty-second aspect, the free end of the rearward extending portion of the lancet cap is more than the position of the needle tip of the puncture needle or the installation position of the needle tip protector (particularly “the rear end of the needle tip protector”). A lancet assembly, wherein a rearward extending portion extends rearward so as to be positioned rearward.
Twenty-fourth aspect : The lancet assembly according to the twenty-second aspect or the twenty-third aspect, wherein the inner side surface of the rearward extension portion of the lancet cap and the outer side surface of the body of the holder are close to or in close contact with each other.
Twenty-fifth aspect : In any one of the twenty-second to twenty-fourth aspects, at least a part of the inner surface of the rearward extending portion of the lancet cap and at least a part of the outer surface of the body of the holder are complementary to each other. A lancet assembly characterized by comprising:
Twenty-sixth aspect : In any one of the twenty-second to twenty-fifth aspects, when the lancet cap is removed from the lancet, the rearward extension portion so that the rearward extension portion of the lancet cap slides on the outer surface of the body of the holder The lancet assembly can be rotated (that is, when the lancet cap is removed, the rearward extension portion gripped by the user slides and rotates on the outer surface of the body of the holder).
Twenty-seventh aspect : In any one of the twenty-second to twenty-sixth aspects, the lancet body includes a bent shape variable position portion, while the holder includes a locked portion for locking the bent shape variable position portion. And
A lancet assembly characterized in that a bent portion of the bending shape variable position portion (that is, a bent portion positioned at an intermediate portion of the bending shape variable position portion) is positioned so as to be locked to a locked portion of the holder. .
Twenty-eighth aspect : A puncture device comprising the injector according to any one of the first to twenty-first aspects and the lancet assembly according to any of the twenty-second to twenty-seventh aspects.
29th aspect : In the 28th aspect dependent on the 14th aspect,
A circumferential ridge is provided on the outer peripheral surface of the holder of the lancet assembly,
A puncture device characterized in that when the lancet assembly is loaded into the injector, the circumferential raised portion of the holder once comes into contact with the dome-shaped portion of the holder holding member, and then climbs over the dome-shaped portion.
Thirty aspect : In the twenty-eighth aspect or the twenty-ninth aspect depending on the twenty-seventh aspect, the holder includes a further locked portion for locking the bent shape variable position portion,
When only the lancet is moved forward after the lancet and plunger are engaged with each other and the lancet assembly is loaded into the injector, the bent portion of the bent shape variable position portion (ie, the bent shape variable position portion of the lancet body). A puncture device in which a bent portion located in an intermediate portion of the holder is locked to a further locked portion of the holder.
Thirty-first aspect : In any one of the twenty-eighth aspect to the thirtieth aspect depending on the eighth aspect,
The injector further comprises a trigger lever for causing the lancet to fire in the lancet assembly loaded in the injector;
The trigger lever has a rear projection for temporarily stopping the lancet of the lancet assembly loaded in the injector from moving forward, and a further additional projection at a position in front of the rear projection. A puncture device comprising a portion.
Thirty-second aspect : In the thirty-first aspect, after the lancet assembly is loaded into the injector by engaging the lancet and the plunger, the trigger member is operated before the lancet cap is removed, and the lancet A puncture device characterized in that when the assembly is pulled out of the injector, advancement of the plunger connected to the lancet assembly is prevented by an additional protrusion of the trigger lever.

As mentioned above, although embodiment of this invention has been described, this invention is not limited to this. One skilled in the art will readily appreciate that the present invention is not limited to various configurations and that various modifications can be made. For example, the puncture needle 143 has a shape in which the tip is pointed like a needle as shown in the figure, but is not necessarily limited to such a form. For example, the puncture needle 143 may have a “blade” in which one side surface of the tip is sharp.

Cross-reference of related applications

This application claims priority under the Paris Convention based on Japanese Patent Application No. 2015-31017 (Filing Date: February 19, 2015, Title of Invention: “Injector, Lancet Assembly and Puncture Device”). All the contents disclosed in the application are incorporated herein by this reference.

100 lancet assembly 130 lancet assembly lancet 140 lancet body 142 lancet body flexible protrusion 143 puncture needle 143a puncture needle tip (needle tip)
144 Bent shape variable position part of lancet body 144A Bent part of bent shape variable position part 145 Rear end part of lancet body 146 Front end part of lancet body 150 Lancet cap 152 Needle point protection part of lancet cap 152A Needle point protection part of lancet cap Back end 152 '' Lancet cap needle tip protector (preferred modification)
152a Local protuberance provided on the needle tip protection portion 152b '' Hollow portion provided on the needle tip protection portion (an example of a suitable modification)
154 Cap head portion of the lancet cap 156 Rear extension portion of the lancet cap 156M, 156N Outer curved surface of the rear extension portion 156A Inner side surface of the rear extension portion 156B Free end of the rear extension portion 170 Holder of the lancet assembly 170A Body of the holder 171 Opening end of the holder 172 Opening end of the puncture of the holder 173 Raised portion provided on the outer surface of the holder 173 ″ Raised portion provided on the outer surface of the holder
174 Stepped portion provided on the inner wall of the holder 174A Surface formed by the stepped portion 175 Locking portion provided on the inner wall of the holder 180 Peripheral raised portion of the holder 190A Holder locked for locking the bent shape variable position portion Part 190B Further holder locked part for locking the bent shape variable position part 200 Injector 201 Front end opening of the injector 202 Lancet assembly receiving member 202A of the lancet assembly holding mechanism Sub receiving member A
202A ₁ , 202A ₂ A pair of rear protrusions 202B of the sub-receiving member A 202B Sub-receiving member B
202a Circumferential groove provided on the outer surface of the fuselage of the lancet assembly receiving member 202b Notched opening provided in the fuselage of the lancet assembly receiving member 202c Guide raised portion of the lancet assembly receiving member 202c '' Guide raised portion of the lancet assembly receiving member (Preferred modification example)
202d guide groove of lancet assembly receiving member 202d '' guide groove of lancet assembly receiving member (preferred modification example)
210 Injector casing 212 Protruding portion provided on the inner wall surface of the injector casing 215 Complementary shape portion provided on the inner wall surface of the injector casing 216 Opening window for scale provided in the injector casing 216a First opening for scale Window 216b Second opening window for scale 220 Plunger 220a Plunger fire spring 220b Plunger trigger projection 220c Plunger return spring 221 Plunger trunk cylinder 221A Front side of plunger barrel cylinder Edge 222 Plunger tip (cylindrical mounting part to which the lancet is attached)
225 Plunger depth adjustment protrusion 227 Indicator display portion provided at the rear end of the plunger 230 Trigger lever (trigger member)
230a Trigger lever rear protrusion 230b Trigger lever front end 230c Trigger lever further protrusion (protrusion for preventing needle tip exposure)
240 Cylindrical member of puncture depth adjusting mechanism 242 Concavity and convexity provided on cylindrical member of puncture depth adjusting mechanism 242a, 242b, 242c... Surface forming concave and convex portion 246 Provided on cylindrical member of puncture depth adjusting mechanism Step portions 246a, 246b, 246c... Step portions having different heights 248 Scale values provided on the cylindrical member of the puncture depth adjustment mechanism 248a Scale value first value sequence 248b Scale value second value sequence 250 Puncture depth Spring member 260 of the length adjusting mechanism 260 Holder holding member 260A of the lancet assembly holding mechanism Sub holding member A
260B Sub clamping member B
265 (265a, 265b) Local bending portion of holder clamping member 265 'Dome shape portion of local bending portion 265A Local bending portion of sub clamping member A 265A' Dome provided on local bending portion (inner side surface) of sub clamping member A Shape portion 265B Local bending portion 265B ′ of sub clamping member B Dome shape portion 270 provided at local bending portion (inner surface) of sub clamping member B 272 Ejector 272 Ejector tip 275 Elastic portion provided at ejector 276 Ejector Provided indicator window 277 Ejector plunger retracting contact portion 1000 Puncture device

100 'lancet assembly 101' lancet 102 'protective cover 104' lancet body 105 'puncture member 106' lancet cap 108 'weakening member 200' injector 204 'plunger 214' front end opening of injector 264 ', 266' tip of plunger 514 'Trigger member 542' Press part of trigger member

Claims (31)

An injector for firing a lancet of a lancet assembly for puncture, comprising a plunger for firing the lancet in the puncture direction, and an injector casing containing the plunger,
The puncture depth adjustment mechanism of the injector
A protrusion protruding outward from the plunger in the transverse direction thereof,
It has a cylindrical member provided with an uneven part and a step part, and a spring member provided side by side with the cylindrical member along the axial direction of the injector,
The concave and convex portion is provided on the cylindrical member so that the normal of the surface forming the concave and convex portion is substantially parallel to the axial direction of the injector, while the complementary shape portion having a shape complementary to a part of the concave and convex portion is the injector Abutting between a part of the concavo-convex part of the cylindrical member and the complementary shape part of the injector casing is held by the pressing force provided from the spring member,
When the plunger moves forward at the time of puncturing, the plunger's protruding part collides with the step part of the cylindrical member, so that the plunger cannot move further forward, and the puncture depth In adjusting the position of the plunger, by rotating the cylindrical member about its axial center, the step portion where the protruding portion of the plunger collides can be changed to a step portion having a different height. An injector whose travel distance is changed. The concavo-convex portion of the cylindrical member has a form that is periodically continuous along the circumferential direction of the cylindrical member,
When the puncture depth is adjusted by rotating the cylindrical member, a part of the concavo-convex part of the cylindrical member that contacts the complementary shape part of the injector casing is changed to another part. The injector according to 1. The injector according to claim 2, wherein the spring member temporarily contracts when a part of the concavo-convex part of the cylindrical member contacting the complementary shape part of the injector casing is changed to another part. . The injector according to any one of claims 1 to 3, wherein the spring member is a coil spring. While the cylindrical member is provided with a scale value along the circumferential direction, the injector casing is provided with a scale opening window for exposing the scale value of the cylindrical member,
The cylindrical member is composed of a first numerical value column and a second numerical value column that are adjacent to each other, and a first opening window provided on the opposite side surface of the injector casing, and a second opening. The numerical value of the first numerical sequence is exposed from the first opening window, while the numerical value of the second numerical sequence is exposed from the second opening window. The injector according to any one of the above. The uneven portion is provided in an end region of the outer peripheral surface of the cylindrical member, and the complementary shape portion is provided on the inner wall surface of the injector casing. injector. The step is provided on the inner peripheral surface of the cylindrical member, and the plunger penetrates the cylindrical member so that the protruding portion of the plunger is positioned inside the cylindrical member. 7. The injector according to any one of 6. An injector for firing a lancet of a lancet assembly for puncture, comprising a plunger for firing the lancet in the puncture direction, and an injector casing containing the plunger,
The injector lancet assembly holding mechanism
A lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly; and a metal holder holding member attached to the lancet assembly receiving member.
An injector in which the holder holding member holds the holder when the lancet assembly is loaded into the injector so that the holder of the lancet assembly is received in the lancet assembly receiving member. The injector according to claim 8, wherein the holder of the lancet assembly is clamped by the holder clamping member by the elastic force of the holder clamping member. The holder holding member has a two-part configuration including a sub-holding member A and a sub-holding member B, and the sub-holding member A and the sub-holding member B are arranged to face each other. The injector according to 8 or 9. The holder clamping member has a locally curved portion, a part of which is locally curved or bent inward.
The injector according to any one of claims 8 to 10, wherein when the lancet assembly is loaded into the injector, the local curved portion comes into contact with the outer surface of the holder of the lancet assembly. A holder clamping member is attached to the outer surface of the lancet assembly receiving member,
The injector according to claim 11, wherein a local curved portion of the holder holding member is exposed from a notch portion of the lancet assembly receiving member on the inner surface of the lancet assembly receiving member. The injector according to any one of claims 8 to 12, wherein the inner side surface of the local curved portion has a dome-shaped portion. The lancet assembly receiving member has a two-part configuration including a sub receiving member A positioned on the front side of the injector and a sub receiving member B positioned on the rear side of the injector. The injector according to any one of claims 11 to 13, which is dependent on claim 10, wherein the injector has a ring shape. The sub receiving member A is provided with a pair of rear projecting portions projecting rearward, and the pair of rear projecting portions are positioned on the sub clamping member A and the sub clamping member B. The injector according to claim 14. Further comprising an ejector for discharging the lancet assembly loaded in the injector;
While the ejector is provided with an elastic part, a protrusion is provided on the inner wall surface of the injector casing. When the lancet assembly is loaded into the injector to engage the lancet and the plunger, the elastic part of the ejector The injector according to any one of claims 1 to 15, wherein the injector once contacts the protrusion of the injector and then climbs over the protrusion. The injector according to claim 16, wherein the lancet and the plunger are completely engaged when the elastic portion of the ejector gets over the protrusion of the injector. The injector according to claim 16 or 17, wherein the ejector has a long shape, and an elastic portion is provided at a tip portion of the long shape ejector. The injector according to any one of claims 16 to 18, wherein the elastic portion has a branching shape extending rearward so as to branch from the ejector body. The ejector is provided with a plunger retreating contact,
When the ejector is moved backward after puncturing, the plunger retracting contact portion of the ejector contacts the plunger, and thereby the plunger retracts due to the pressing force received from the ejector. The injector according to any one of claims 1 to 19. A lancet assembly composed of a lancet and a holder storing the lancet,
The lancet has a lancet body, a lancet cap and a puncture needle, and a metal puncture needle lies in the resin lancet body and the lancet cap, and the needle tip of the puncture needle is provided by the lancet cap. Covered,
The lancet cap
Needle tip protector that protects the puncture needle,
It has a cap head part that is connected to the needle point protection part and is positioned at the forefront of the lancet cap, and a pair of rear extension parts that are connected to the cap head part and extend backward from the cap head part. And
A lancet assembly in which a rearward extension of the lancet cap extends along the outer surface of the holder body. The rear extension portion extends rearward so that the free end of the rear extension portion of the lancet cap is positioned behind the needle tip position of the puncture needle or the rear end of the needle tip protection portion. The lancet assembly of claim 21. The lancet assembly according to claim 21 or 22, wherein the inner side surface of the rearward extension portion of the lancet cap and the outer side surface of the body of the holder are close to or in close contact with each other. 24. The method according to claim 21, wherein at least a part of the inner side surface of the rearward extending portion of the lancet cap and at least a part of the outer side surface of the body of the holder are complementary to each other. The lancet assembly according to crab. The rear extension part can be rotated so that the rear extension part of the lancet cap slides on the outer surface of the body of the holder when the lancet cap is removed from the lancet. Lancet assembly. While the lancet body has a bent shape variable position part, the holder has a locked part for locking the bent shape variable position part,
The lancet assembly according to any one of claims 21 to 25, wherein the bent portion of the bent shape variable position portion is positioned so as to be locked to the locked portion of the holder. A puncture device comprising the injector according to any one of claims 1 to 20 and the lancet assembly according to any one of claims 21 to 26. A circumferential ridge is provided on the outer peripheral surface of the holder of the lancet assembly,
Claim according to claim 13, wherein when the lancet assembly is loaded into the injector, the circumferential raised portion of the holder once comes into contact with the dome-shaped portion of the holder clamping member, and then climbs over the dome-shaped portion. Item 26. The puncture device according to Item 27. The holder has a further locked part for locking the bending shape variable position part,
When only the lancet is moved forward after the lancet and plunger are engaged with each other and the lancet assembly is loaded into the injector, the bent portion of the bending shape variable position of the lancet body is further locked by the holder. 29. The puncture device according to claim 27 or 28, dependent on claim 26, characterized in that it is locked to the part. The injector further comprises a trigger lever for causing the lancet to fire in the lancet assembly loaded in the injector;
The trigger lever has a rear projection for temporarily preventing the lancet from moving forward in the lancet assembly loaded in the injector, and a further projection at a position on the front side of the rear projection. The puncture device according to any one of claims 27 to 29, which is dependent on claim 8, characterized by comprising: After the lancet assembly is loaded into the injector by engaging the lancet and the plunger, if the trigger member is operated before the lancet cap is removed and the lancet assembly is pulled out of the injector, the lancet 31. The puncture device according to claim 30, characterized in that the advancement of the plunger in connection with the is prevented by a further protrusion of the trigger lever.

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