CN116570216A - Active bending section, insertion part and endoscope - Google Patents

Abstract

The invention discloses an active bending section, an insertion part and an endoscope. The active bending section can be applied to the endoscope, and the endoscope includes an instrument tube. The active bending section includes a plurality of sequentially connected tube unit units, and adjacent tube unit units can rotate relatively; inside the tube unit unit is provided with an installation channel along its axial direction, and the installation channel is used to install the instrument tube; An avoidance groove is provided in the first radial direction, and the tube unit can rotate in the first radial direction; when the instrument tube is installed in the installation channel, an avoidance space is formed between the avoidance groove and the outer wall of the instrument tube. In the present invention, an avoidance groove is provided in the tube unit of the active bending section, and an avoidance space is formed between the wall of the avoidance groove and the outer wall of the instrument tube. Bending deformation is generated inside, thereby increasing the bending radius of the bending part of the instrument tube, which is beneficial to reducing the occurrence of depressions during the bending process of the instrument tube.

Description

Active bending section, insertion part and endoscope

technical field

The invention relates to the technical field of medical instruments, in particular to an active bending section, an insertion part and an endoscope.

Background technique

Endoscope is a commonly used medical device, an inspection device that can directly enter the natural pipeline of the human body, and can provide doctors with sufficient diagnostic information to treat diseases. In specific use, by controlling the bending of the active bending section of the insertion part, the orientation of the front-end module can be adjusted, thereby obtaining image information of the target site.

In the related art, the active bending section processes a slit on the pipe wall of the bending pipe, so that the bending pipe passes through the slit to realize the bending action. However, during the use of the active bending section of this structural layout, the active bending section bends During the process, the instrument tube will be bent and deformed, resulting in concave phenomenon in some parts of the instrument tube, which will affect the smooth access of the disposal instrument.

Contents of the invention

The invention discloses an active bending section, an insertion part and an endoscope to solve the problem in the related art that the instrument tube in the active bending section of the insertion part is prone to indentation.

In order to solve the above problems, the present invention adopts the following technical solutions:

In a first aspect, the present application provides an active bending section. The active bending section is applicable to endoscopes, which include instrument tubes.

The active bending section includes a plurality of sequentially connected pipe joint units, and the adjacent pipe joint units can rotate relatively; the inside of the pipe joint unit is provided with an installation channel along its axial direction, and the installation channel is used to install the The instrument tube; the tube section unit is provided with an avoidance groove in the first radial direction of the installation channel, and the tube section unit can rotate along the first radial direction; when the instrument tube is installed in the installation channel In some cases, a avoidance space is formed between the avoidance groove and the outer wall of the instrument tube.

In a second aspect, the present application provides an insertion part, including the above-mentioned active bending section.

In a third aspect, the present application provides an endoscope, which includes a handle and an insertion part, the handle is connected to the insertion part, and the handle can control the bending of the active bending section.

The technical scheme adopted in the present invention can achieve the following beneficial effects:

In the present invention, an avoidance groove is provided in the tube unit of the active bending section, and an avoidance space is formed between the wall of the avoidance groove and the outer wall of the instrument tube. The avoidance space can provide bending deformation space for the instrument tube, so that the instrument tube can be bent in the tube unit Bending deformation is generated inside, thereby increasing the bending radius of the bending part of the instrument tube, which is beneficial to reducing the occurrence of depressions during the bending process of the instrument tube.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the bending state of the active bending section in the related art;

Fig. 2 is a schematic diagram of the active bending section in the embodiment of the present application;

Fig. 3 is a schematic diagram of the instrument tube installed in the active bending section in the embodiment of the present application;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is a schematic diagram of the bending state of the active bending section in the embodiment of the present application;

Fig. 6 is a cross-sectional view of a part of the bending state of the active bending section in the embodiment of the present application;

Fig. 7 is a side view of the pipe unit in the embodiment of the present application;

Figure 8 is a schematic diagram of the avoidance trough in the embodiment of the present application;

Figure 9 is a second schematic diagram of the avoidance trough in the embodiment of the present application;

In the picture:

100-pipe unit, 101-flexible connection part, 102-slit, 103-avoidance space, 110-installation channel, 111-avoidance groove, 111a-first groove section, 111b-second groove section, 111c-third Groove section, 112-installation groove, 113-smooth surface, 200-instrument tube.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally of one type, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

In the related art, an endoscope includes an operating part (also referred to as a handle) and an insertion part, and the handle part is used to control the insertion part to enter the human body. The insertion part includes an active bending section and a passive bending section. The active bending section has a slit 102 processed on its tube wall, so that the active bending section can realize the bending action through the slit 102, and the slit 102 divides the active bending section into multiple sequentially connected The tube unit 100. The internal structure of each tube unit 100 in the active bending section has an installation channel 110 to pass through the instrument tube 200 and the optical fiber bundle. Suction job.

In order to maximize the instrument channel, the outer wall of the instrument tube 200 in the related art is in close contact with the inner wall of the installation channel 110 of the active bending section. Please refer to FIG. 1 , during the bending process of the active bending section, the instrument tube 200 will bend along with the active bending section, and the part of the instrument tube 200 located in the tube unit 100 is limited by the installation channel 110 and cannot be bent and deformed. The part of the instrument tube 200 located at the slit 102 between two adjacent tube unit units 100 is not limited by the installation channel 110, therefore, the part of the instrument tube 200 at the slit 102 appears concave during the follow-up bending process, to accommodate the bending action of the active bending segment. Moreover, the larger the bending angle of the active bending section is, the larger the relative rotation angle of two adjacent tube unit units 100 will be, and the concave phenomenon of the instrument tube 200 will be more obvious. Since the instrument tube 200 is deformed at the slits 102 in the active bending section, the lumen of the instrument tube 200 presents an irregular and continuous shape, which makes it easy to appear in the concave part of the instrument tube 200 during the delivery of the treatment instrument. In the case of stopping, this leads to a greater risk in the use of the active bending section.

In view of this, some embodiments of the present application provide an active bending section, which is applied to an endoscope, and the endoscope includes an instrument tube 200 . Exemplarily, the instrument tube 200 is disposed at the insertion part, so that the instrument can enter the body along the instrument tube 200 .

Please refer to FIG. 2 to FIG. 8 , the active bending section disclosed in the embodiment of the present application includes a plurality of sequentially connected pipe unit units 100 , and adjacent pipe unit units 100 can rotate relative to each other.

In some optional embodiments, two adjacent pipe section units 100 are rotationally connected, so that the two adjacent pipe section units 100 can be rotated relative to each other, thereby realizing bending of the active bending section. Specifically, two adjacent pipe unit units 100 in the active bending section may be riveted by but not limited to. Exemplarily, the active bending section can be an integral injection molding structure, and two adjacent pipe section units 100 are connected through a flexible connection part 101, so that two adjacent pipe section units 100 can deform relative to each other through the flexible connection part 101 deflection. A plurality of slits 102 with the same width are arranged along the axial direction of the active bending section and a plurality of tube unit units 100 are divided by the plurality of slits 102 .

It can be understood that the slit 102 can form a deformation space on the active bending section, through which the adjacent pipe unit units 100 can approach each other, so as to realize the relative rotation between the pipe section units 100, and the entire axial direction of the active bending section Viewed from above, the cooperation of multiple pipe joint units 100 can realize the bending action of the active bending section.

The active bending section of the embodiment of the present application is an integrated injection molding structure. Of course, its specific processing technology is not limited. The gap can be formed by cutting, etching and other technological means. Among them, the cutting technology can be preferably laser cutting technology, which can optimize processing efficiency. And processing accuracy, injection molding after molding has higher overall strength.

Referring to FIG. 2 and FIG. 3 , an installation channel 110 is provided inside the tube unit 100 along its axial direction, and the installation channel 110 is used for installing the instrument tube 200 . It can be understood that the instrument tube 200 can be installed on the active bending section through the installation channel 110 of each tube unit 100. The bending section bends along with the bending action.

The tube unit 100 is provided with an escape groove 111 in the first radial direction of the installation channel 110, and the tube unit 100 can rotate along the first radial direction; when the instrument tube 200 is installed in the installation channel 110, the avoidance groove 111 and the instrument An escape space 103 is formed between the outer walls of the pipe 200 .

4 to 6, the pipe unit 100 can rotate along the first radial direction of the installation channel 110, that is, when two adjacent pipe unit 100 rotate relative to each other, the rotation direction of the pipe unit 100 is the same as the first radial direction of the respective installation channel 110. A radial is in the same direction. Exemplarily, the first radial direction is the X direction shown in FIG. 6 . The avoidance groove 111 is provided in the first radial direction of the installation channel 110 of the tube unit 100, that is to say, the avoidance groove 111 is set corresponding to the bending direction of the instrument tube 200, and is located on one or both sides of the first radial direction of the installation channel 110. In this way, deformation space can be provided for the instrument tube 200 on one or both sides of the first radial direction of the installation channel 110 .

In the case of bending of the active bending section, the avoidance groove 111 can provide an avoidance space 103 for the instrument tube 200 in the tube unit 100, so that the instrument tube 200 can produce bending deformation in the tube unit 100, and is no longer limited by the installation channel 110 The limited abutment of the edge of the side wall at the end prevents the instrument tube 200 from only being concavely deformed in a narrow space between two adjacent tube unit units 100 to adapt to the bending action of the active bending section. Therefore, the active bending section provided in this embodiment can increase the bending radius of the bending part of the instrument tube 200, and provide a larger bending deformation space for the bending of the instrument tube 200, thereby effectively reducing the occurrence of depressions during the bending process of the instrument tube 200, avoiding The lumen in the instrument tube 200 is locally reduced, which is beneficial to improving the stability of the instrument tube 200 during the bending process, so as to improve the patency of the instrument passing through the bending part of the instrument channel.

Of course, in some optional embodiments, the active bending section has more than two different bending directions, and the pipe joint unit 100 can rotate in different radial directions along the installation channel 110, corresponding to the different rotational directions of the pipe joint unit 100, when it is installed An escape groove 111 is provided beside the channel 110 . Through the avoidance grooves 111 in the radial direction of different installation channels 110, when the instrument tube 200 faces the rotation of the active bending section in different bending directions, local depressions can be avoided through greater bending deformation, so that the instrument tube 200 can better follow the active bending direction. The curved sections are curved for better stability.

Please refer to FIG. 7 , in some embodiments of the present application, the tube unit 100 is provided with installation grooves 112 on both sides of the second radial direction of the installation channel 110 , and the groove walls of the installation grooves 112 at least partially stop at the ends of the instrument tube 200 outer wall.

The installation groove 112 plays a role of limiting and fixing the instrument tube 200 , so that the instrument tube 200 is installed in the installation channel 110 . The first radial direction and the second radial direction are different radial directions of the installation channel 110 , and the installation groove 112 and the avoidance groove 111 are respectively provided in different directions of the installation channel 110 to avoid interference and intersection between them. The installation grooves 112 on both sides of the second radial direction jointly limit the position of the instrument tube 200 , and fix the position of the instrument tube 200 in the installation channel 110 to realize the installation and fixation of the instrument tube 200 . When both sides of the instrument tube 200 are provided with installation grooves 112 , the walls of the installation grooves 112 can partially stop against the outer wall of the instrument tube 200 , so that the instrument tube 200 can be installed and fixed.

In some optional embodiments, the groove wall of the installation groove 112 is adaptively designed according to the shape of the instrument tube 200 . Exemplarily, the groove bottom of the installation groove 112 is spaced apart from the instrument tube 200 to form an avoidance space 103, and the groove wall of the installation groove 112 is partially attached to the instrument tube 200. Under such a structural layout, the installation groove 112 can also play a role Due to the role of the avoidance groove 111, the tube unit 100 provides a bending and deformation avoidance space 103 for the instrument tube 200 on the side where the installation groove 112 is located, and further provides a larger deformation space for the bending deformation of the instrument tube 200, which is beneficial to improving the instrument tube 200. Bend adaptability.

In some embodiments of the present application, the installation groove 112 is adapted to the instrument tube 200 , and the installation groove 112 is attached to the outer wall of the instrument tube 200 .

It can be understood that the shape of the groove wall of the installation groove 112 matches the shape of the outer wall of the instrument tube 200, so that the installation groove 112 and the instrument tube 200 can fit together, effectively increasing the contact area between the installation groove 112 and the instrument tube 200, which is beneficial to improve Instrument tube 200 installation stability.

Exemplarily, in some optional embodiments, please refer to FIG. 2 to FIG. 9 , the outer circumference of the instrument tube 200 is circular, the shape of the groove wall of the installation groove 112 is curved, and the two installation grooves 112 are located on the sides of the instrument tube 200 respectively. Both sides in the radial direction are in contact with the instrument tube 200 , so that the instrument tube 200 is clamped between the two installation grooves 112 . In addition, the curved groove wall can limit the side wall of the instrument tube 200 in the peripheral direction of the instrument tube 200, so that in the vertical direction of the second radial direction, the curved groove wall can also limit the instrument tube 200 effect. Therefore, the active bending section in this embodiment increases the installation contact area of the instrument tube 200, which is beneficial to ensure the reliability of fixing the instrument tube 200 during the bending process.

Please refer to FIG. 7 , in some embodiments of the present application, the first radial direction is perpendicular to the second radial direction.

Under such a structural layout, the avoidance groove 111 and the installation groove 112 are arranged to intersect with each other in the radial direction and radial direction of the installation channel 110, so as to ensure that the bending deformation part of the instrument tube 200 in the circumferential direction can be relatively small during the bending process of the instrument tube 200. The distance from the installation groove 112 to a large extent reduces the restriction effect of the edge of the installation groove 112 on the bending deformation of the instrument tube 200 , which is beneficial to improving the bending flexibility of the instrument tube 200 . Wherein, the first radial direction is the X direction shown in FIG. 7 , and the second radial direction is the Y direction shown in FIG. 7 .

Exemplarily, in some optional embodiments, avoidance grooves 111 or installation grooves 112 are provided in more than two radial directions of the installation passage 110. Under this structural layout, the avoidance grooves 111 and the installation grooves 112 are The installation channel 110 is evenly distributed in the circumferential direction, so that the avoidance groove 111 and the installation groove 112 can be far away from each other to the greatest extent, reducing the situation that the instrument tube 200 is squeezed by the edge of the installation groove 112 during the bending process and appears concave, which is beneficial. Because the instrument tube 200 is bent and deformed in a relatively gentle manner, the overall bending uniformity of the instrument tube 200 is improved.

Referring to FIG. 2 and FIG. 7 , in some embodiments of the present application, the avoidance groove 111 is concavely arranged along the first radial direction of the installation channel 110 , and the wall surface of the avoidance groove 111 is a curved surface.

Taking the installation channel 110 as a reference, the escape groove 111 is recessed outward along the radial direction of the installation channel 110 (that is, the radial direction of the instrument tube 200 ) to form a groove structure, and the groove wall surface is curved. The avoidance space 103 formed between the groove wall of the avoidance groove 111 and the outer wall of the instrument tube 200 can provide an occupied space for the convexly deformed outer wall of the instrument tube 200 , so that the instrument tube 200 can adapt to the bending of the active bending section.

Exemplarily, the avoidance space 103 formed between the groove wall of the avoidance groove 111 and the outer wall of the instrument tube 200 presents a crescent shape in the cross-sectional view of the installation channel 110 . During the bending deformation process of the instrument tube 200, the outer wall of the instrument tube 200 protrudes and deforms toward the bending side, and the convexly deformed outer wall presents an arc shape, and the shape of the avoidance space 103 is similar to that of the protrudingly deformed outer wall of the instrument tube 200, and the crescent-shaped avoidance space 103 is more suitable for the convex deformation of the instrument tube 200.

At the same time, since the active bending section is limited by the use environment, the volume of the pipe unit 100 itself is usually small, so the volume of the avoidance groove 111 should not be set too large, so as not to occupy too much internal space of the pipe unit 100 and reduce the size of the pipe unit. 100 overall structural strength. The avoidance space 103 provided between the groove wall of the curved avoidance groove 111 and the outer wall of the instrument tube 200 can match the space occupied by the deformation of the instrument tube 200 to the greatest extent, thereby improving the space utilization rate of the avoidance space 103 and meeting the volume requirements of the active bending section And ensuring the overall structural strength of the tube unit 100 is beneficial to improving the compactness of the assembly of the instrument tube 200 and the active bending section.

Referring to FIG. 8 , in some embodiments of the present application, the escape groove 111 penetrates the pipe unit 100 along the axial direction of the pipe unit 100 .

The avoidance groove 111 penetrates the tube unit 100 axially along the installation channel 110 , and forms an avoidance hole through the tube unit 100 on the first radial side of the installation channel 110 and the side wall of the instrument tube 200 . The avoidance through hole can provide bending deformation space for the instrument tube 200, so that the part of the instrument tube 200 within the range of the tube unit 100 can be deformed to a certain extent, which is beneficial to the bending deformation of the instrument tube 200 along with the active bending section. Therefore, the active bending section in this embodiment can effectively relieve the pressure that the instrument tube 200 can only be bent and deformed at the slit 102, thereby reducing the probability of indentation of the instrument tube 200, thereby improving the stability of the instrument tube 200 during use , so that the disposal equipment can be passed smoothly.

Exemplarily, in some optional embodiments, in order to facilitate the processing of the avoidance groove 111 , the shape and size of the avoidance groove 111 along the axial direction of the pipe unit 100 are the same everywhere, which reduces the difficulty of processing the active bending section.

Please refer to FIG. 9 , in some embodiments of the present application, the distance between the escape groove 111 and the outer wall of the instrument tube 200 gradually decreases along the first direction, and the first direction is from the end of the installation channel 110 to the middle of the installation channel 110 direction.

During the bending process of the instrument tube 200 , the slit 102 between adjacent tube unit units 100 is the main part of the instrument tube 200 bending deformation. The avoidance groove 111 at the end of the installation channel 110 can allow the bending deformation area of the instrument tube 200 to extend into the interior of the tube unit 100, thus increasing the bending radius of the instrument tube 200 between adjacent tube units 100 and improving the shape of the instrument tube 200. indentation phenomenon. The distance between the bottom of the avoidance groove 111 and the outer wall of the instrument tube 200 gradually decreases along the first direction, that is, the size of the avoidance space 103 gradually decreases along the first direction, so that the avoidance space 103 has the largest size at the end of the installation channel 110, The tube section unit 100 provides a larger bending deformation space for the instrument tube 200 near the slit 102 . The avoidance space 103 near the middle of the tube unit 100 is small, so that the middle of the tube unit 100 has a certain restraint effect in the first radial direction, so as to prevent the entire instrument tube 200 from moving to the first radial direction due to bending. The active bending section in this embodiment can provide an avoidance space 103 for the bending of the instrument tube 200 , effectively increasing the bending radius of the instrument tube 200 between adjacent tube unit units 100 , thereby improving the concave phenomenon of the instrument tube 200 .

In addition, the size of the avoidance space 103 in the middle of the pipe unit 100 is smaller than the size of the avoidance space 103 at its two ends, effectively ensuring the volume of the solid structure in the middle of the pipe unit 100, which is conducive to ensuring the overall structural strength of the pipe unit 100, thereby helping to ensure active bending overall structural strength of the segment.

In some embodiments of the present application, the escape groove 111 has a first groove segment 111a, a second groove segment 111b, and a third groove segment 111c arranged in sequence along the axial direction of the pipe unit 100, the first groove segment 111a, the second groove segment The segment 111b and the third groove segment 111c are arranged axially along the tube unit 100, the second groove segment 111b is located between the first groove segment 111a and the third groove segment 111c, and the groove wall of the second groove segment 111b is at least in contact with the instrument tube 200 When the outer wall parts contact, the second groove segment 111b can limit the instrument tube 200 in the first radial direction, prevent the instrument tube 200 from moving in the first radial direction due to bending, and improve the installation stability of the instrument tube 200 .

Exemplarily, please continue to refer to FIG. 9. In some optional embodiments, the avoidance groove 111 is divided into three sequentially connected first groove segments 111a, second groove segments 111b and third groove segments 111c, wherein the first The second groove section 111b is located between the first groove section 111a and the third groove section 111c, the second groove section 111b is located in the middle of the tube unit 100, and the groove wall of the second groove section 111b is adapted to the outer wall of the instrument tube 200. Fit each other. In this way, the instrument tube 200 has a stop and stop structure in the first radial direction, which can directly limit the instrument tube 200 , so that the installation performance of the instrument tube 200 is more reliable, and prevents its movement and deviation due to bending. Further, the distance between the first groove segment 111a and the outer wall of the instrument tube 200, and the distance between the third groove segment 111c and the outer wall of the instrument tube 200 gradually decrease from the end of the installation channel 110 to the middle of the installation channel 110, so as to avoid The space 103 has the largest size at the position of the first groove section 111a and the third groove section 111c, and the tube unit 100 provides a larger bending deformation space for the instrument tube 200 near the slit 102, effectively increasing the size of the instrument tube 200 in the corresponding position. The bending radius between adjacent tube unit units 100 can further improve the concave phenomenon of the instrument tube 200 .

In some embodiments of the present application, please refer to FIG. 4 and FIG. 7 , a smooth surface 113 is provided between the escape groove 111 and the installation channel 110 , and the avoidance groove 111 and the installation channel 110 are connected through the smooth surface 113 .

The smooth surface 113 is located between the rim of the escape groove 111 and the side wall of the installation channel 110 , and plays a role of smooth transition between the avoidance groove 111 and the installation channel 110 . Under this structural layout, the smooth surface 113 increases the contact area with the outer wall of the instrument tube 200, avoiding excessive stress concentration of the instrument tube 200 at the edge of the escape groove 111, causing irreversible deformation of the instrument tube 200 and affecting the bending of the instrument tube 200 performance. In addition, during the bending deformation process of the instrument tube 200 , the outer wall of the instrument tube 200 can smoothly protrude and deform along the smooth portion to the avoidance space 103 , meeting the requirements of the instrument tube 200 bending deformation.

Exemplarily, please refer to FIG. 7 , there is a smooth part between the edge of the escape groove 111 and the installation channel 110 , the smooth part protrudes toward the inner cavity of the instrument tube 200 , and the smooth surface 113 is the outer wall surface of the smooth part. The smooth portion is similar to a circular chamfer, and the instrument tube 200 bends and deforms along the smoothness of the smooth portion toward the avoidance space 103 during the bending deformation process, which is beneficial to the bending deformation of the instrument tube 200 .

An embodiment of the present application also provides an insertion part, which includes the active bending section mentioned in any of the foregoing solutions. The insertion portion of this embodiment has the beneficial effects of the aforementioned active bending section, which will not be repeated here.

The insertion portion may also include a passive curved section connected to a proximal end of the active curved section, which may passively follow a bend in the event of an active bend of the active curved section.

The insertion part may also include a hard tube section connected to the proximal end of the passive bending section, which is not easy to bend or not bent at all, so as to improve the overall controllability of the insertion part.

The embodiment of the present application also provides an endoscope, which includes a handle and the aforementioned insertion part, the handle is connected to the insertion part, and the handle can control the bending of the active bending section. The endoscope of this embodiment has the beneficial effects of the aforementioned insertion portion and active bending section, which will not be repeated here.

In some embodiments of the present application, the handle may include a steering adjustment mechanism, which can control the rotation of the insertion part around its axis, and combined with the bending action of the active bending section, the universal rotation of the active bending section can be realized. In the embodiment where the handle includes a steering adjustment mechanism, there may be two pull ropes.

The endoscope in the embodiment of the present application may be a gastroscope, a colonoscope, a laryngoscope, a fiberoptic bronchoscope, etc., and the type of the endoscope is not specifically limited in the embodiment of the present application.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention.

Claims (10)

1. An active bending section for an endoscope, the endoscope comprising an instrument tube (200), characterized in that the active bending section comprises a plurality of tube segment units (100) connected in sequence, adjacent tube segment units (100) being rotatable relative to each other; a mounting channel (110) is arranged in the pipe joint unit (100) along the axial direction of the pipe joint unit, and the mounting channel (110) is used for mounting the instrument pipe (200);

the pipe joint unit (100) is provided with an avoidance groove (111) in a first radial direction of the installation channel (110), and the pipe joint unit (100) can rotate towards the first radial direction; when the instrument tube (200) is mounted on the mounting channel (110), an avoidance space (103) is formed between the avoidance groove (111) and the outer wall of the instrument tube (200).

2. The active bending section according to claim 1, characterized in that the tube segment unit (100) is provided with mounting grooves (112) on both sides of the mounting channel (110) in the second radial direction, the groove walls of the mounting grooves (112) at least partially ending against the outer wall of the instrument tube (200).

3. The active bending section according to claim 2, wherein the mounting groove (112) is adapted to the instrument tube (200) and the mounting groove (112) is in abutment with the outer wall of the instrument tube (200).

4. The active bending section according to claim 1, wherein the relief groove (111) is concavely arranged along a first radial direction of the mounting channel (110), and a groove wall surface of the relief groove (111) is a curved surface.

5. The active bending section according to any one of claims 1 to 4, wherein the relief groove (111) extends axially through the pipe section unit (100) along the pipe section unit (100);

and/or, the distance between the avoiding groove (111) and the outer wall of the instrument tube (200) gradually decreases along a first direction, wherein the first direction is from the end part of the mounting channel (110) to the middle part of the mounting channel (110).

6. The active bending section according to any one of claims 1 to 4, characterized in that the relief groove (111) has a first groove section (111 a), a second groove section (111 b) and a third groove section (111 c) which are arranged in sequence in the axial direction of the tube segment unit (100), the second groove section (111 b) at least partially abutting against the outer wall of the instrument tube (200).

7. The active bending section according to claim 5, characterized in that a smooth surface (113) is provided between the relief groove (111) and the mounting channel (110), and that the relief groove (111) and the mounting channel (110) are connected by means of the smooth surface (113).

8. The active bending section of claim 5, wherein the active bending section is integrally injection molded.

9. An insert comprising the active bending section of any one of claims 1 to 8.

10. An endoscope comprising a handle and the insertion portion of claim 9, the handle being coupled to the insertion portion, the handle being capable of controlling bending of the active bending section.