CN113855932A

CN113855932A - Safe low-residue syringe

Info

Publication number: CN113855932A
Application number: CN202111302763.8A
Authority: CN
Inventors: 刘辉
Original assignee: JIANGSU KANGBAO MEDICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU KANGBAO MEDICAL EQUIPMENT CO Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2021-12-31

Abstract

The invention relates to a rubber plug-free needle cylinder, which comprises a steel needle, a needle cylinder and a push rod, wherein the front end of the push rod is provided with the rubber plug, the rubber plug is positioned in the needle cylinder and is in sliding connection with the needle cylinder, and the rear end of the push rod is positioned outside the needle cylinder; the front end of the needle cylinder is provided with a needle seat, the needle seat is provided with a fixing hole communicated with the inside of the needle cylinder, the steel needle is fixed on the fixing hole, and the inside of the steel needle is communicated with the fixing hole. Compared with the existing syringe with the steel needle and the needle cylinder connected by the luer connector, the safe low-residue syringe provided by the invention has the advantages that the diameter of the fixing hole is greatly reduced relative to the diameter of the luer connector pair, so that the residual quantity of the syringe in use is greatly reduced.

Description

Safe low-residue syringe

Technical Field

The invention relates to the technical field of medical instruments, in particular to a safe low-residue injector.

Background

Syringes are widely used in clinical medicine. Especially under the condition of global epidemic outbreak, the injection of vaccine becomes an effective prevention means. The realization of the large-scale vaccination of the vaccine is also important for the supply of matched products such as syringes and the like besides the research and development of the vaccine. LDS syringes (Low head Space syringee-Low residue syringes) have become popular pets in the industry once they are marketed due to the widespread vaccine shortage around the world. The syringe can greatly reduce vaccine left in the needle, and the utilization efficiency of the vaccine is improved by more than 20%. The dosage of 1 hundred million people can be inoculated by using a common injector, and the goal of 1.2 hundred million people inoculation can be achieved by using a low-residue injector.

The steel needle of the syringe is used to penetrate human tissue, for example, human muscle or blood vessels, to inject a medicament into the human tissue. Accordingly, the steel needle discarded after use may also injure a user or others by mistake. For example, it punctures the skin of the human body, thereby causing cross-infection of body fluids such as blood. Accordingly, various forms of safety syringes have emerged on the market.

The safety syringe in the prior art generally has the following defects:

1. due to the limitation of production process, the existing safety syringes are mostly of a split design that a steel needle and a syringe use a luer connector, and the two parts need to be assembled for use, but a large space and a gap exist between the two parts, so that the waste of liquid medicine such as vaccine is caused, and particularly, the residual liquid medicine (referred to as high-residual liquid medicine 7 in the application) in the syringe using the luer connector in the split structure in fig. 1 is shown;

2. clinically, the dosage of the liquid medicine is very strict whether the vitreous eyeball or the fragile neural retina tissue is used. The existing injection liquid medicine for treatment, such as hormone, intramembranous antibacterial agent, vitreous body analysis and the like, has the treatment dosage of only 0.02-0.1 ml. However, the capacity of the ordinary syringe with the smallest dose on the market is 1ml, and the accurate injection work cannot be completely satisfied. Because the treatment dosage is very small, the residual syringe with large size seriously influences the treatment effect.

Disclosure of Invention

In view of the above-mentioned problems with the prior art, the present invention provides a safe low-residue syringe to solve at least one of the above-mentioned problems.

In order to achieve the above object, the present invention provides a technical solution as follows:

a safe low-residue injector comprises a steel needle, a needle cylinder and a push rod, wherein a rubber plug is arranged at the front end of the push rod, the rubber plug is positioned in the needle cylinder and is in sliding connection with the needle cylinder, and the rear end of the push rod is positioned outside the needle cylinder; the front end of the needle cylinder is provided with a needle seat, the needle seat is provided with a fixing hole communicated with the inside of the needle cylinder, the steel needle is fixed on the fixing hole, and the inside of the steel needle is communicated with the fixing hole.

Preferably, the rear end of the steel needle is inserted into the fixing hole and is spaced from the rear end of the fixing hole.

Preferably, the steel needle and the needle seat are in interference fit or are integrally arranged.

Preferably, a safety sheath is arranged on the needle seat, the safety sheath comprises a connecting body and a base, and the connecting body is connected with the needle seat; the connecting body is hinged with the base, and a groove for covering the steel needle is arranged on the base; a V-shaped elastic sheet is arranged between the connecting body and the base, one end of the V-shaped elastic sheet is connected with the connecting body, and the other end of the V-shaped elastic sheet is connected with the base; the middle part of the groove is provided with a barb, and a needle blocking plate is arranged on one side of the opening corresponding to the barb in the groove.

Preferably, the barb is positioned on the rear side or the front side of the needle guard plate; the base comprises a bottom plate and a protective wall, the protective wall is arranged on two sides of the bottom plate and one end of the bottom plate, which is far away from the connecting body, and the groove is formed between the protective wall and the bottom plate; the barb comprises a connecting plate, an inclined plate and a baffle plate, one end of the connecting plate is connected with the bottom plate, and the other end of the connecting plate is connected with one end of the inclined plate; the other end of the inclined plate is connected with the baffle; the needle blocking plate comprises a connecting surface, a needle blocking surface and an inclined surface, the connecting surface is connected with the bottom plate and/or the protective plate, the needle blocking surface, the baffle and the bottom plate are arranged in parallel, the inclined plate and the inclined surface are arranged in an inclined mode relative to the connecting plate, and the connecting plate, the inclined plate and the baffle enclose an opening of the barb; the needle blocking surface is arranged corresponding to the inclined surface and is close to one end of the baffle.

Preferably, the distance from one end of the needle blocking surface far away from the bottom plate to the bottom plate is greater than or equal to the distance from the baffle plate to the bottom plate; the inclined plane is perpendicular to the inclined plate.

Preferably, the retaining wall is provided with a first buckle and a second buckle for clamping the needle seat, and the second buckle is positioned at the rear side of the first buckle.

Preferably, a protective cover used for covering the steel needle is arranged on the needle base, the protective cover is detachably connected with the needle base, and the connecting body is positioned at the rear side of the protective cover; in the original state, the needle seat is covered by the protective cover, and the base is positioned on one side of the needle cylinder; in the using state, the protective cover is detached, and after the protective cover is used, the base can be overturned under the action of external force to limit the steel needle.

Preferably, the connecting body is a ring sleeve, and the ring sleeve is sleeved on the needle seat.

Preferably, the needle stand with the cylinder can be dismantled and be connected, keep away from on the needle stand the one end of steel needle is provided with stopcock and gum cover, the gum cover covers the stopcock.

Compared with the existing syringe with the steel needle and the needle cylinder connected by the luer connector, the safe low-residue syringe provided by the invention has the advantages that the diameter of the fixing hole is greatly reduced relative to the diameter of the luer connector pair, so that the residual quantity of the syringe in use is greatly reduced.

Drawings

FIG. 1 is a schematic view of a prior art safety low residue syringe;

FIG. 2 is a schematic diagram of a safety low residue syringe according to one embodiment of the present invention, shown in its initial state prior to use;

FIG. 3 is a schematic diagram of a safety low residue syringe according to one embodiment of the present invention, shown in a fully safe and protected position;

FIG. 4 is a top view of a safety shield of the present invention;

FIG. 5 is a side view of the steel needle after it has snapped into the safety shield;

FIG. 6 is a perspective view of a safety shield of the present invention;

FIG. 7 is a schematic view of a safe low residual lancet provided by another embodiment of the present invention;

reference numerals in the figures; the device comprises a steel needle 1, a needle base 2, a needle cylinder 21, a low-residue liquid medicine 3, a rubber plug 4, a push rod 5, a safety sheath 6, a ring sleeve 61, a hinge 62, a first buckle 63, a second buckle 64, a barb 65, a connecting plate 651, a sloping plate 652, a baffle 653, a needle baffle plate 66, a connecting surface 661, a needle baffle surface 662, a sloping surface 663, a V-shaped elastic sheet 67, a protective wall 68, a bottom plate 69, a high-residue liquid medicine 7, a shield 8, a rubber sleeve 9 and a stopcock needle 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiment 1, the safe low-residue injector provided by the invention, referring to fig. 2 and 3, comprises a steel needle 1, a needle cylinder 21 and a push rod 5, wherein a rubber plug 4 is mounted at the front end of the push rod, the rubber plug is positioned in the needle cylinder and is slidably connected with the needle cylinder, and the rear end of the push rod is positioned outside the needle cylinder; preceding, back in this application the position be with the user state as the reference, specifically can figure 3 as the reference, the front end of cylinder is provided with needle file 2, be provided with on the needle file with the fixed orifices of the inside intercommunication of cylinder (not marking in the picture), the steel needle is fixed in on the fixed orifices, inside with the fixed orifices intercommunication, when using, steel needle 1 is used for pricking human tissue, for example, is used for pricking muscle or blood vessel for injection or blood sampling. When the structure is actually manufactured, the rear end of the steel needle can be inserted into the fixing hole, a small space is reserved between the rear end of the steel needle and the rear end of the fixing hole, and the steel needle and the needle seat are fixed on the fixing hole in an interference fit mode or an integrated setting mode.

Compared with the prior syringe with a steel needle and a needle cylinder connected by a luer connector, the safe low-residue syringe has the advantages that the diameter of the fixing hole is greatly reduced relative to the diameter of the luer connector pair, so that the residue of the syringe in use is greatly reduced, and the comparison between the graph 1 and the graph 2 shows that the safe low-residue syringe mainly comprises residual liquid medicine inside the luer connector (namely high-residue liquid medicine 7) and residual liquid medicine in gaps between connectors, the residual liquid medicine in the safe residual syringe (namely low-residue liquid medicine 3) mainly comprises liquid medicine in a small gap at the rear end of the fixing hole in the fixing hole, and the comparison between the residual liquid medicine and the residual liquid medicine can obviously show the low-residue effect.

In the above embodiment, the rear end of the steel needle is arranged to have a small distance from the rear end of the fixing hole, the rear end of the steel needle can be generally positioned at the front side of the rear end of the fixing hole, and a corresponding bulge can be arranged at the position corresponding to the fixing hole when the rubber plug is manufactured, so that the front end of the rubber plug is pressed against the needle cylinder to be integrally deformed, and the bulge can be clamped at the position of the small distance of the fixing hole, thereby preventing the liquid medicine from flowing back to cause waste of the liquid medicine in the deformation recovery process of the rubber plug; as an implementation mode, the rear end of the steel needle and the rear end of the fixing hole are slightly spaced by the rear side of the rear end of the fixing hole, which is arranged at the rear end of the steel needle, so that the front end of the rubber plug is firstly contacted with the rear end of the steel needle when in use and then deforms to abut against the needle cylinder, the contact position of the front end of the rubber plug and the rear end of the steel needle is extruded and damaged by the steel needle, and part of the rubber plug is plugged into the hole of the steel needle to block the hole of the steel needle, thereby preventing the liquid medicine of the rubber plug from flowing back in the deformation recovery process.

As a preferred embodiment, the needle holder is provided with a safety shield 6, which can use the existing structure, and in this embodiment, the applicant designs a safety shield: referring to fig. 2 to 5, the safety sheath includes a connecting body and a base, the connecting body is connected with the needle base, in this embodiment, the connecting body is a snare 61, and is sleeved on the rear end portion of the needle base, the connecting body is hinged with the base, the connecting body can be hinged with the base through a hinge 62, and a groove for covering the steel needle is arranged on the base; a V-shaped elastic sheet 67 is arranged between the connecting body and the base, one end of the V-shaped elastic sheet is connected with the connecting body, and the other end of the V-shaped elastic sheet is connected with the base; the middle part of recess is provided with barb 65, in the recess in correspond one side of the opening of barb is provided with needle board 66, be provided with on the dado and be used for blocking first buckle 63 and second buckle 64 of needle file, the second buckle is located the rear side of first buckle. When the safety protection sleeve is used, referring to fig. 1, the base is rotated upwards along the hinge position to enable the groove of the base to cover the steel needle, then the needle seat is clamped through the first buckle and the second buckle, the steel needle is limited through the barb, and the needle blocking plate blocks the steel needle on one side of the opening of the barb, so that the steel needle can be prevented from being separated from the barb along the opening position corresponding to the barb when the needle cylinder or the base is unscrewed accidentally or intentionally, and the protection effect of the safety protection sleeve is better; when upwards rotating base along hinge position, because V-arrangement shell fragment atress warp and make and block behind first buckle of card and the second buckle card the needle file always receive the elasticity restriction, more be difficult to by opening, in this embodiment, the hinge can also use a connecting plate to replace, sets up a V-arrangement groove on the connecting plate for the connecting plate can be bent for the V-arrangement groove.

As a preferred embodiment, referring to fig. 4-6, the barbs are located on the rear side of the needle board; the base comprises a bottom plate 69 and a protective wall 68, the protective wall is arranged at two sides of the bottom plate and one end of the bottom plate far away from the connecting body, and the groove is formed between the protective wall and the bottom plate; the barb comprises a connecting plate 651, an inclined plate 652 and a baffle 653, one end of the connecting plate is connected with the bottom plate, and the other end of the connecting plate is connected with one end of the inclined plate; the other end of the inclined plate is connected with the baffle; the needle blocking plate comprises a connecting surface 661, a needle blocking surface 662 and an inclined surface 663, the connecting surface is connected with the bottom plate and/or the protective plate, the needle blocking surface, the baffle and the bottom plate are arranged in parallel, the inclined plate and the inclined surface are arranged in an inclined mode relative to the connecting plate, and the connecting plate 651, the inclined plate 652 and the baffle 653 enclose an opening with a barb; the needle blocking surface is arranged corresponding to the inclined surface and is close to one end of the baffle; the distance from one end of the needle blocking surface far away from the bottom plate to the bottom plate is greater than or equal to the distance from the baffle plate to the bottom plate; generally, the inclined surface may be disposed perpendicular to the inclined plate. This structure is at the in-process along the ascending swivel base of hinge point position, the steel needle at first receives swash plate and inclined plane restriction to the position motion that is close to the baffle, the steel needle contacts the back with swash plate or baffle, at first extrudees the swash plate and makes steel needle or connecting plate produce the micro-deformation back, the steel needle is located the opening of barb, treat connecting plate or steel needle and resume deformation back, the steel needle by the restriction firmly in the opening, generally, the medial surface that keeps off needle face and baffle sets up to flush can, in this preferred mode, the barb also can be located the front side of needle blocking board.

In actual manufacturing, in order to prevent the steel needle from being pricked during taking and placing processes, the needle base is generally provided with a protective cover 8 for covering the steel needle, the protective cover is detachably connected with the needle base, the general protective cover is directly clamped on the needle base, and the connecting body is positioned at the rear side of the protective cover; in the original state, the needle seat is covered by the protective cover, and the base is positioned on one side of the needle cylinder; in the using state, the protective cover is detached, and after the protective cover is used, the base can be overturned under the action of external force to limit the steel needle.

Embodiment 2, embodiment 2 is a further improvement on embodiment 1, refer to fig. 7, the needle seat is detachably connected with the needle cylinder, and can be generally set in a threaded connection or a clamping connection manner, a stopcock 10 and a rubber sleeve 9 are arranged at one end of the needle seat far away from the steel needle, and the rubber sleeve covers the stopcock, so that a multifunctional injector can be formed by the structure, when blood is required to be collected, the structure shown in fig. 7 is used for collecting blood, after the blood collection is finished, the steel needle is sleeved with a safety sheath, the rubber sleeve can be made of a material with poor elasticity, such as styrene butadiene rubber, and mainly plays a protective role, when the multifunctional injector is used, the rubber sleeve is taken down, the steel tube is used as a blood collection needle and is inserted into the blood vessel, and the stopcock is inserted into a negative pressure blood collection tube for use; the gum cover can use the better material preparation of elasticity performance, for example silicon rubber, latex or isoprene rubber, generally with the needle file with the cylinder is connected as an organic wholely, and the gum cover is placed alone as the device for the blood sampling, installs the gum cover during the use, uses the direct pressure of negative pressure blood sampling tube head rubber buffer to insert gum cover 9, and the inside blood sampling tube that reaches behind gum cover and the rubber buffer is impaled respectively to pipe stopper needle 10, because the inside vacuum that presets of blood sampling tube, so the negative pressure is with in blood drainage to the blood sampling tube, after finishing using, pull out the blood sampling tube hard, corresponding gum cover reconversion, then live the parcel of pipe stopper needle again, the physics blocks blood outflow. During actual manufacturing, the tube plugging needle can be independently arranged and detachably connected with the needle seat, the tube plugging needle and the steel needle can be preferably manufactured into a whole, and the length of the tube plugging needle is set according to the length of the fixing hole.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A safe and low-residue syringe, comprising a steel needle (1), a syringe barrel (21) and a push rod (5), a rubber stopper (4) is installed at the front end of the push rod, and the rubber stopper is located in the needle The inside of the cylinder is slidably connected with the needle cylinder, and the rear end of the push rod is located outside the needle cylinder; it is characterized in that,

The front end of the needle cylinder is provided with a needle seat (2), the needle seat is provided with a fixing hole communicating with the inside of the needle cylinder, the steel needle is fixed on the fixing hole, and the inside is connected with the fixing hole Connected.

2 . The safety low-residue syringe according to claim 1 , wherein the rear end of the steel needle is inserted into the fixing hole, and there is a distance from the rear end of the fixing hole. 3 .

3 . The safe low-residue syringe according to claim 1 or 2 , wherein the steel needle and the needle seat are in an interference fit or are integrally arranged. 4 .

4. A safety low-residue syringe according to claim 1 or 2, characterized in that, a safety sheath (6) is provided on the needle seat, and the safety sheath comprises a connecting body and a base, and the connecting the body is connected with the needle seat;

The connecting body is hinged with the base, and the base is provided with a groove for covering the steel needle;

A V-shaped elastic piece (67) is arranged between the connecting body and the base, one end of the V-shaped elastic piece is connected with the connecting body, and the other end is connected with the base;

A barb (65) is arranged in the middle of the groove, and a needle blocking plate (66) is arranged inside the groove on the side corresponding to the opening of the barb.

5. The safety low-residue syringe according to claim 4, wherein the barb is located on the rear side or the front side of the needle baffle;

The base comprises a bottom plate (69) and a protective wall (68), the protective walls are arranged on both sides of the bottom plate and an end of the bottom plate away from the connecting body, and the groove is formed between the protective wall and the bottom plate;

The barb includes a connecting plate (651), an inclined plate (652) and a baffle plate (653), one end of the connecting plate is connected with the bottom plate, and the other end is connected with one end of the inclined plate;

The other end of the inclined plate is connected with the baffle;

The needle blocking plate includes a connecting surface (661), a needle blocking surface (662) and an inclined surface (663), the connecting surface is connected with the bottom plate and/or the guard plate, and the needle blocking surface, the baffle plate and the The bottom plate is arranged in parallel, the inclined plate and the inclined surface are inclined relative to the connecting plate, and the connecting plate (651), the inclined plate (652) and the baffle plate (653) enclose the opening of the barb; the The needle blocking surface is disposed corresponding to the inclined surface and is close to one end of the baffle plate.

6 . The safety low-residue syringe according to claim 5 , wherein the distance from the end of the needle blocking surface away from the bottom plate to the bottom plate is greater than or equal to the distance between the baffle plate and the bottom plate. 7 . distance;

The inclined surface is perpendicular to the inclined plate.

7. A safety low-residue syringe according to claim 5, characterized in that, the protective wall is provided with a first buckle (63) and a second buckle (64) for clamping the needle seat, The second buckle is located at the rear side of the first buckle.

8. A safe low-residue syringe according to claim 5, characterized in that, a shield (8) for covering the steel needle is provided on the needle seat, and the shield and the needle seat can be connected dismounting the connection, the connection body is located at the rear side of the shield;

In the original state, the shield covers the needle seat, and the base is located on one side of the needle barrel;

In a use state, the shield is removed, and after use, the base can be turned over under the action of an external force to restrain the steel needle.

9 . The safe low-residue syringe according to claim 4 , wherein the connecting body is a snare ( 61 ), and the snare is sleeved on the needle seat. 10 .

10 . The safety low-residue syringe according to claim 1 , wherein the needle seat is detachably connected to the syringe barrel, and a tube plug is provided on the needle seat at one end away from the steel needle. 11 . A needle (10) and a rubber sleeve (9), the rubber sleeve covers the tube plug needle.