CN221105918U - Steering assembly of endoscope anastomat and endoscope anastomat - Google Patents

Abstract

The utility model relates to a steering assembly of an endoscope anastomat, which comprises a plurality of tooth grooves which are arranged on the inner wall of a shell and extend along the up-down direction, wherein the tooth grooves are uniformly distributed along the circumferential direction; the steering assembly further comprises a matching assembly which can be matched and locked with the tooth grooves and can perform relative motion with the tooth grooves to provide hand feeling and/or sound feedback, the matching assembly has elasticity, and the matching assembly is positioned in an accommodating space surrounded by a plurality of the tooth grooves; the matching component comprises a matching body fixedly connected with the knob or the first linkage component and convex teeth which are fixedly arranged on the peripheral side wall of the matching body and can be inserted into the tooth grooves; the first linkage assembly is locked when the teeth are positioned in the tooth slots; when the convex teeth and the tooth grooves move relatively, the matching component is elastically deformed.

Description

Steering assembly of endoscope anastomat and endoscope anastomat

Technical Field

The utility model relates to the field of medical instruments, in particular to a steering assembly of an endoscopic stapler and the endoscopic stapler.

Background

In order to facilitate finding a proper suture position during a surgical procedure, the laparoscopic stapler often requires rotating the jaw assembly through a certain angle. As CN108742742a discloses a steering device for an endoscopic cutting stapler, comprising an integrated steering cover and upper swivel. The pivot rotates and sets up on last rotating head, and the bottom of pivot has spacing disc. The fluted disc is fixed to be set up in last rotating head, and a plurality of tooth's sockets have been seted up on the top of fluted disc, and the counter bore with spacing disc complex is seted up to the bottom of fluted disc. The non-return plate is arranged on the rotating shaft, rotates along with the rotating shaft, and extends with convex ribs matched with the tooth grooves, and the convex ribs slide through the tooth grooves in the rotating process of the rotating shaft. The knob is located above the steering cover, the steering cover covers the non-return plate, and the rotating shaft is rotated by rotating the knob. The rotating shaft is also sleeved with a wave spring, the wave spring is positioned between the non-return plate and the steering cover, and a gasket is arranged between the non-return plate and the wave spring. Under the elastic force of the wave spring, a pretightening force is arranged between the non-return plate and the fluted disc, so that the knob, the rotating shaft and the non-return plate can rotate for a tooth slot of an angle each time, and can stay at the rotating angle without backing due to the cooperation of the convex rib and the tooth slot.

The steering device in the prior art has more parts and more complex assembly, and the problem of influencing the use due to poor assembly is easy to occur. Furthermore, the steering devices of the prior art do not have a feel or audible cue when adjusting gears.

Disclosure of Invention

The utility model aims to provide a steering assembly of an endoscopic stapler with fewer parts and a gear prompting function and the endoscopic stapler.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

In one aspect, the application provides a steering assembly of an endoscopic stapler, comprising a housing, a knob mounted on the housing and rotatable relative to the housing, a first linkage assembly connected to the knob and rotatable with rotation of the knob, a second linkage assembly connected to the first linkage assembly and slidable in a front-to-back direction with rotation of the first linkage assembly,

The steering assembly further comprises a plurality of tooth grooves which are arranged on the inner wall of the shell and extend in the up-down direction, and the tooth grooves are uniformly distributed along the circumferential direction;

The steering assembly further comprises a matching assembly which can be matched and locked with the tooth grooves and can perform relative motion with the tooth grooves to provide hand feeling and/or sound feedback, the matching assembly has elasticity, and the matching assembly is positioned in an accommodating space surrounded by a plurality of the tooth grooves;

The matching component comprises a matching body fixedly connected with the knob or the first linkage component and convex teeth which are fixedly arranged on the peripheral side wall of the matching body and can be inserted into the tooth grooves;

The first linkage assembly is locked when the teeth are positioned in the tooth slots; when the convex teeth and the tooth grooves move relatively, the matching component is elastically deformed.

According to some specific and preferred embodiments, the matching body comprises a first body fixedly connected with the knob or the first linkage assembly, and one or more second bodies circumferentially distributed around the periphery of the first body, wherein one convex tooth is arranged at the middle position of the peripheral side wall of each second body; each second body is fixedly connected with the first body, and a gap is formed between at least part of the inner side wall of the second body and the outer side wall of the first body.

Further preferably, only opposite ends of the second body are fixedly connected with the outer side wall of the first body, and gaps are formed between the inner side walls of the rest parts and the outer side wall of the first body.

Further preferably, the number of the second bodies is 2 to 4, for example 2, 3 or 4, preferably 2.

Further preferably, the material of the second body is a tough plastic, such as PA, PC or PBT with toughness.

Further preferably, the thickness of the second body is 0.8 to 1.3mm, for example 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm or 1.3mm.

Further preferably, the maximum gap between the inner side wall of the second body and the outer side wall of the first body is 1.6-3.2 mm, for example 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm or 3.2mm.

Further preferably, each second body includes two first connecting portions which are planar and symmetrically arranged, two second connecting portions which are fixedly connected with the outer ends of the two first connecting portions respectively and are arc-shaped, the inner ends of the two first connecting portions are fixedly connected with the first bodies respectively, and a gap is reserved between the first connecting portions of two adjacent second bodies.

According to some specific and preferred embodiments, the two sidewalls of each tooth slot form an angle that is 4-8 ° smaller than the angle formed by the two sidewalls of the tooth.

Further preferably, the two side walls of each tooth slot form an included angle of 67-71 °.

According to some specific and preferred embodiments, the first linkage assembly comprises a rotating shaft fixedly connected with the knob, a rotating head seat fixedly connected with the rotating shaft, and a rotating head pin fixedly arranged on the rotating head seat, wherein the axis of the rotating head pin is staggered with that of the rotating shaft; the second linkage assembly is connected with the first linkage assembly through the swivel pin; the matching component is fixedly sleeved on the rotating shaft, and the axis of the rotating shaft of the matching component coincides with the axis of the rotating shaft.

According to some specific and preferred embodiments, the steering assembly further comprises a limit rib provided on the housing, and a boss provided on the knob and capable of cooperating with the limit rib to prevent the knob from continuing to rotate.

A second aspect of the present application provides an endoscopic stapler having a steering assembly as described above, and a binding clip assembly connected to a second linkage assembly of the steering assembly.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

According to the utility model, through the improvement of the tooth socket of the steering assembly and the matching assembly, not only can the hand feeling and/or sound prompt during gear adjustment be realized, but also the operator can be prompted whether the corner is in place or not; and the tooth grooves and the convex teeth are meshed to ensure that the fixed angle is firmer and the rotation is not easy to occur. In addition, the utility model has fewer parts, simpler assembly and more stable matching of the parts.

Drawings

FIG. 1 is a schematic view of an endoscopic stapler according to an embodiment (with the clamp head assembly not turned);

FIG. 2 is a schematic view of an endoscopic stapler (with the clamp head assembly turned to a maximum angle) according to an embodiment;

FIG. 3 is an exploded side view of a steering assembly in one embodiment;

FIG. 4 is an exploded perspective view of the steering assembly in one embodiment;

FIG. 5 is a perspective view of a steering assembly in one embodiment;

FIG. 6 is a partial top view of a steering assembly (knob not shown) in one embodiment;

FIG. 7 is an enlarged view of a portion of FIG. 6;

FIG. 8 is a perspective view of the mating assembly;

FIG. 9 is a partial schematic view of a steering assembly in an embodiment;

FIG. 10 is a schematic view of a first linkage assembly and a second linkage assembly;

FIG. 11 is a schematic view of a swivel pull block;

FIG. 12 is a perspective view of the first linkage assembly;

FIG. 13 is a top view of the first linkage assembly;

Wherein: 1. a clamp head assembly; 2. a steering assembly; 21. a housing; 22. a knob; 23. a first linkage assembly; 24. a second linkage assembly; 211. an upper housing; 212. a lower housing; 213. an annular sidewall; 214. a limit rib; 221. a boss; 231. a rotating shaft; 232. a swivel base; 233. a swivel pin; 241. turning the head and pulling the block; 242. a connecting sheet; 243. a chute; 244. a drag hook; 245. pulling holes; 25. tooth slots; 26. a mating assembly; 261. a mating body; 262. convex teeth; 2611. a first body; 2612. a second body; 26121. a first connection portion; 26122. and a second connecting part.

Detailed Description

The utility model will be further described with reference to examples of embodiments shown in the drawings.

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the embodiments of the present utility model, it should be understood that the terms "front", "rear", "upper", "lower", etc. are defined in terms of the orientation of fig. 1, wherein the side of the clamp head assembly 1 is front, the side of the housing 21 is rear, and the side of the knob 22 is upper. The above directional terms are merely used to facilitate the description of embodiments of the utility model and to simplify the description, and are not meant to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and are therefore not to be construed as limiting of embodiments of the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In embodiments of the utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different implementations, or examples, for implementing different configurations of embodiments of the utility model. In order to simplify the disclosure of embodiments of the present utility model, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present utility model. Furthermore, embodiments of the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

Fig. 1 and 2 show an endoscopic stapler comprising a clamp head assembly 1 and a steering assembly 2 connected to the clamp head assembly 1 and capable of driving the clamp head assembly 1 to rotate by a certain angle. The specific structure of the binding clip assembly 1 and the connection structure of the binding clip assembly 1 and the steering assembly 2 are not important to the present utility model, and the existing structure, such as the structure disclosed in CN108742742a, may be adopted.

Fig. 3 to 13 show a steering assembly 2 comprising a housing 21, a knob 22, a first linkage assembly 23, a second linkage assembly 24, etc. The first linkage assembly 23 is connected to the knob 22 and can rotate as the knob 22 rotates, the second linkage assembly 24 is connected to the first linkage assembly 23 and can slide in the front-rear direction as the first linkage assembly 23 rotates, and the second linkage assembly 24 is connected to the jaw assembly 1 so as to drive the jaw assembly 1 to turn when the second linkage assembly 24 slides in the front-rear direction.

As shown in fig. 3 and 4, the housing 21 includes an upper housing 211 and a lower housing 212 detachably coupled with each other with an accommodating space therebetween. The detachable connection structure of the upper housing 211 and the lower housing 212 is not an important point of the protection of the present utility model, and may be a clamping manner, a bolt fixing manner, or the like.

As shown in fig. 3, 4 and 9, the upper housing 211 has an opening on an upper surface thereof and an annular sidewall 213 is formed to extend upward from a periphery of the opening. The knob 22 is partially located in the space formed by the annular sidewall 213 and partially located outside the upper housing 211, so that an operator can operate the knob 22, and the knob 22 is mounted on the upper housing 211 and can rotate relative to the upper housing 211.

The inner wall of the annular side wall 213 of the upper housing 211 is provided with a limit rib 214, and the outer side of the bottom surface of the knob 22 is provided with a boss 221, when the knob 22 rotates to a set maximum angle relative to the housing 21, the boss 221 contacts with the limit rib 214 to prevent the knob 22 from continuing to rotate along the original rotation direction. In this embodiment, the limit rib 214 has a semicircular shape, so that the maximum angle at which the knob 22 in this embodiment can be rotated in the left-right direction in the initial state is limited to 90 °. The initial state is a state in which the extending direction of the clamp head assembly 1 is consistent with the extending direction of the steering assembly 2 and the clamp head assembly 1 is not turned.

As shown in fig. 3, 4, 10, 12 and 13, the first linkage assembly 23 includes a rotation shaft 231, a swivel seat 232 and a swivel pin 233. The rotation shaft 231 passes through a space formed by the annular side wall 213 of the upper housing 211, the upper end of the rotation shaft 231 is fixedly connected with the knob 22, and the lower end of the rotation shaft 231 is fixedly provided with a rotation seat 232. The swivel pin 233 is fixedly disposed at a position near the outside of the bottom of the swivel seat 232, and the axis of the swivel pin 233 is offset from the axis of the rotating shaft 231. When the knob 22 rotates, the rotation shaft 231 rotates along with the knob 22, and the rotation shaft 231 rotates to drive the rotation head seat 232 to rotate, so as to drive the rotation head pin 233 to rotate together. The fixing connection mode of the rotating shaft 231 and the knob 22 can adopt the modes of clamping, bolt fixing and the like, and the rotating shaft 231 and the rotating head seat 232, the rotating head pin 233 and the rotating head seat 232 can realize the fixing connection through the modes of clamping, integral forming and the like.

As shown in fig. 3, 4, 10 and 11, the second linkage assembly 24 includes a swivel pull 241 and a connecting tab 242. The turning slider 241 is disposed in the accommodation space formed by the upper case 211 and the lower case 212, and the turning slider 241 can slide in the front-rear direction relative to the case 21, and the turning slider 241 can be slidably connected to the case 21 by means of a slider chute or the like, or other structures capable of realizing the relative sliding of the turning slider 241 and the case 21 are also possible. The turn head pull block 241 is provided with a slide groove 243, the slide groove 243 extends in the left-right direction of the steering unit 2, and the turn head pin 233 is inserted into the slide groove 243 and is slidable relative to the slide groove 243. When the knob 22 rotates to drive the rotary head seat 232 to rotate, the rotary head pin 233 rotates around the axial line of the rotary shaft 231 and slides in the sliding groove 243, so that the rotary head pulling block 241 is driven to move along the front-back direction of the endoscope anastomat.

The swivel pull block 241 is further provided with a draw hook 244, the connecting piece 242 is provided with a pull hole 245, and the swivel pull block 241 and the connecting piece 242 are connected through the draw hook 244 and the pull hole 245, so that when the swivel pull block 241 moves along the front-back direction, the connecting piece 242 moves along the front-back direction along with the swivel pull block 241. The tab 242 is connected to the jaw assembly 1 such that movement of the tab 242 in a fore-aft direction controls the steering of the jaw assembly 1.

As shown in fig. 3 to 8, the steering assembly 2 further includes a plurality of tooth grooves 25 provided on the inner wall of the housing 21 and extending in the up-down direction, specifically, a plurality of tooth grooves 25 provided on the inner wall of the annular side wall 213 of the upper housing 211. The opening of each tooth slot 25 faces the axis of the rotation shaft 231. The tooth grooves 25 are uniformly distributed in the circumferential direction, so that the endoscopic stapler has more gears and can realize adjustment of more rotation angles.

The steering assembly 2 further includes a mating assembly 26 that is capable of mating locking with the tooth slot 25 and of relative movement with the tooth slot 25 to provide a tactile and/or audible feedback. The matching component 26 is located in the space formed by the annular side wall 213 of the upper housing 211 and corresponds to the position of the tooth slot 25, that is, the matching component 26 is located in the accommodating space surrounded by the tooth slots 25, so that the matching component 26 is matched with the tooth slots 25.

As shown in fig. 8, the fitting assembly 26 includes a fitting body 261 fixedly connected with the knob 22 or the first linkage assembly 23, and teeth 262 fixedly provided on an outer circumferential sidewall of the fitting body 261 and capable of being inserted into the tooth grooves 25. When the teeth 262 are positioned in the tooth slots 25, i.e., the teeth 262 are engaged with the tooth slots 25, the first linkage assembly 23 is locked and the angle of rotation of the head assembly 1 is locked. When the teeth 262 and the tooth grooves 25 move relatively, the matching component 26 deforms elastically, and in the process of elastically deforming and resetting the matching component 26, the feedback of sound and/or hand feeling can be sent out, so that the effect of prompting gear change can be achieved.

The number of the teeth 262 is preferably 2-4, as shown in fig. 6, so that when the teeth 262 are meshed with the tooth grooves 25, the fixing effect is better, the back is not easy to occur, and the sound and/or hand feedback is clearer when the gear is adjusted.

The mating body 261 includes a first body 2611 fixedly connected with the knob 22 or the first linkage assembly 23, one or more second bodies 2612 circumferentially distributed around the outer circumference of the first body 2611, and a tooth 262 provided at a central position of the outer circumferential sidewall of each second body 2612. Each second body 2612 is fixedly connected to the first body 2611, and a gap is formed between at least a portion of the inner sidewall of the second body 2612 and the outer sidewall of the first body 2611. Preferably, only opposite ends of the second body 2612 are fixedly connected to the outer sidewall of the first body 2611, and a gap is formed between the inner sidewall of the rest and the outer sidewall of the first body 2611. At least the second body 2612 in the mating assembly 26 has elasticity, or the entire mating assembly 26 is integrally formed with an elastic material. Therefore, when the knob 22 is turned to adjust the steering angle of the binding clip assembly 1, the second body 2612 where the teeth 262 are located is stressed to be elastically deformed inwards in the process of moving the teeth 262 from one tooth slot 25 to the other tooth slot 25, and when the teeth 262 move into the other tooth slot 25, the teeth automatically rebound and reset, so that clear sound feedback and/or hand feeling feedback can be sent out, and an operator can know the gear change conveniently.

In this embodiment, the first body 2611 is annular, the first body 2611 is fixedly sleeved on the rotating shaft 231 through the matching of the protruding block and the groove, and the axis of the rotating shaft of the matching component 26 coincides with the axis of the rotating shaft 231.

The number of the second bodies 2612 is 2-4, in this embodiment, 2 second bodies are symmetrically arranged, and a convex tooth 262 is arranged at the middle position of each second body 2612. The material of the second body 2612 is a tough plastic, such as PA, PC or PBT with toughness, and the material of each part of the mating component 26 may be the same material, such as the same material as the second body 2612, so as to obtain the mating component 26 through integral molding; of course, the portions of the mating assembly 26 may be made of different materials. The thickness of the second body 2612 is 0.8-1.3 mm, for example 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm or 1.3mm. The thickness of the second body 2612 is a distance between an inner sidewall and an outer sidewall of the second body 2612. The maximum gap between the inner sidewall of the second body 2612 and the outer sidewall of the first body 2611 is 1.6-3.2 mm, for example, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm or 3.2mm. By designing the structure, material, size, etc. of the mating assembly 26, the stability of the teeth 262 and the teeth slots 25 when engaged can be further improved, and a clearer sound and/or feel feedback can be provided when the teeth 262 move between the teeth slots 25 to change gear.

Each second body 2612 includes two first connecting portions 26121 which are planar and symmetrically arranged, and two second connecting portions 26122 which are fixedly connected with the outer ends of the two first connecting portions 26121 and are arc-shaped, wherein the inner ends of the two first connecting portions 26121 are fixedly connected with the first body 2611, and a gap is formed between the first connecting portions 26121 of two adjacent second bodies 2612.

As shown in fig. 7, the included angle α formed by the two sidewalls of each tooth slot 25 is 4 to 8 ° smaller than the included angle β formed by the two sidewalls of the tooth 262, for example, 4 °,5 °,6 °,7 °,8 °, or any value between 4 ° and 8 °. Preferably, the included angle α formed by the two side walls of each tooth slot 25 is any value between 67 and 71 °, such as 67 °, 68 °, 69 °,70 °, 71 °, or 4 ° to 8 °, and the included angle β formed by the two side walls of the tooth 262 is any value between 73 ° and 77 °, such as 73 °, 74 °, 75 °, 76 °, 77 °, or 4 ° to 8 °.

Through the design of tooth groove 25 and tooth 262 angle, make tooth 262 and tooth groove 25 guarantee the linear contact when rotating, reduce the rotation resistance, simultaneously, in tooth groove 25 is entered into to tooth 262, can make both sides wall all contact with tooth groove 25 again to tooth 262 is fixed in tooth groove 25 and can not take place to rock, has realized the accurate location of angle promptly.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a steering assembly of laparoscopic anastomat, includes casing (21), install on casing (21) and can relative casing (21) pivoted knob (22), with first linkage subassembly (23) that knob (22) are connected and can rotate along with knob (22) rotation, with first linkage subassembly (23) are connected and can follow first linkage subassembly (23) rotation and along the second linkage subassembly (24) of fore-and-aft direction slip, its characterized in that:

The steering assembly (2) further comprises a plurality of tooth sockets (25) which are arranged on the inner wall of the shell (21) and extend along the up-down direction,

The tooth grooves (25) are uniformly distributed along the circumferential direction;

The steering assembly (2) further comprises a matching assembly (26) which can be matched and locked with the tooth grooves (25) and can perform relative motion with the tooth grooves (25) to provide hand feeling and/or sound feedback, the matching assembly (26) has elasticity, and the matching assembly (26) is positioned in an accommodating space surrounded by a plurality of tooth grooves (25);

The matching component (26) comprises a matching body (261) fixedly connected with the knob (22) or the first linkage component (23), and convex teeth (262) fixedly arranged on the peripheral side wall of the matching body (261) and capable of being inserted into the tooth grooves (25);

-the first linkage assembly (23) is locked when the teeth (262) are located within the tooth slots (25); when the convex teeth (262) and the tooth grooves (25) move relatively, the matching component (26) is elastically deformed.

2. The steering assembly of the endoscopic stapler according to claim 1, wherein: the matching body (261) comprises a first body (2611) fixedly connected with the knob (22) or the first linkage assembly (23), and one or more second bodies (2612) circumferentially distributed around the periphery of the first body (2611), wherein a convex tooth (262) is arranged at the middle position of the peripheral side wall of each second body (2612); each second body (2612) is fixedly connected with the first body (2611), and a gap is formed between at least part of the inner side wall of the second body (2612) and the outer side wall of the first body (2611).

3. The steering assembly of the endoscopic stapler according to claim 2, wherein: only opposite ends of the second body (2612) are fixedly connected with the outer side wall of the first body (2611), and gaps are reserved between the inner side walls of the rest parts and the outer side wall of the first body (2611).

4. The steering assembly of the endoscopic stapler according to claim 2, wherein: the number of the second bodies (2612) is 2-4; and/or, the material of the second body (2612) is ductile plastic; and/or the thickness of the second body (2612) is 0.8-1.3 mm, and the maximum gap between the inner side wall of the second body (2612) and the outer side wall of the first body (2611) is 1.6-3.2 mm.

5. The steering assembly of the endoscopic stapler according to any one of claims 2 to 4, wherein: every second body (2612) is including being two first connecting portion (26121) that plane form and symmetry set up, both ends respectively with two outer end looks fixed connection of first connecting portion (26121) just is circular-arc second connecting portion (26122), two the inner of first connecting portion (26121) respectively with first body (2611) looks fixed connection, adjacent two have the clearance between first connecting portion (26121) of second body (2612).

6. The steering assembly of the endoscopic stapler according to claim 1, wherein: the included angle formed by the two side walls of each tooth groove (25) is 4-8 degrees smaller than the included angle formed by the two side walls of the convex tooth (262).

7. The steering assembly of the endoscopic stapler according to claim 6, wherein: the included angle formed by the two side walls of each tooth groove (25) is 67-71 degrees.

8. The steering assembly of the endoscopic stapler according to claim 1, wherein: the first linkage assembly (23) comprises a rotating shaft (231) fixedly connected with the knob (22), a rotating head seat (232) fixedly connected with the rotating shaft (231) and a rotating head pin (233) fixedly arranged on the rotating head seat (232), and the axial lead of the rotating head pin (233) is staggered with the axial lead of the rotating shaft (231); the second linkage assembly (24) is connected with the first linkage assembly (23) through the swivel pin (233); the matching component (26) is fixedly sleeved on the rotating shaft (231), and the axis of the rotating shaft of the matching component (26) coincides with the axis of the rotating shaft (231).

9. The steering assembly of the endoscopic stapler according to claim 1, wherein: the steering assembly (2) further comprises a limiting rib (214) arranged on the shell (21), and a boss (221) arranged on the knob (22) and capable of being matched with the limiting rib (214) to prevent the knob (22) from continuing to rotate.

10. An endoscopic stapler, characterized in that: the endoscopic stapler has a steering assembly (2) according to any one of claims 1 to 9, and a binding clip assembly (1) connected to a second linkage assembly (24) of the steering assembly (2).