An end effector and a holding bracket therefor

Abstract

The utility model discloses an end effector and its holding support belong to medical instrument field. The holding support includes: with the proximal support of end effector's proximal main part cooperation, with the distal support of end effector's distal execution cooperation and with the joint limiting portion of end effector's joint assembly cooperation, wherein, the joint limiting portion is located the transition area between the proximal support with the distal support, the extension direction of proximal support with the distal support is different. The utility model can keep end effector in the non-collinear position of distal execution and proximal main part, avoid the attitude deviation due to external force.

Description

Technical Field

[0001] This utility model relates to the technical field of accessories for surgical instruments, and in particular to a retaining bracket for an end effector. Background Technology

[0002] Linear clamping, cutting, and anastomosis surgical instruments can be used in surgical procedures to remove tissue. These instruments include a handle assembly, an elongated body assembly, and an end effector. The end effector includes a proximal body portion and a distal actuator pivotally connected via an articulated assembly. The distal actuator includes a cartridge assembly and an anvil assembly, which form a gripping member that can clamp onto the tissue to be anastomosed.

[0003] Currently, surgical instruments typically employ end effectors that are independent of their main body (including the handle assembly and the elongated body assembly). When the end effector is in the loading position, its longitudinal axis coincides with the longitudinal axis of the main body, and the distal actuator can bend to the left or right at a certain angle relative to the longitudinal axis defined by the proximal main body. Such end effectors providing symmetrical bending angles are limited by the structure of the joint assembly, such as mechanical interference of parts, and their maximum bending angle typically does not exceed 50 degrees. Therefore, the applicant proposes a surgical instrument suitable for confined environments, such as pelvic surgery. Its end effector can achieve a maximum bending angle of 90 degrees by bending to one side. In this surgical instrument's end effector, the loading position is located at an angle between the longitudinal axis defined by the distal actuator and the proximal main body. To more reliably hold the end effector in this loading position so that it is reliably loaded onto the main body of the surgical instrument, a retaining bracket is needed. Utility Model Content

[0004] Therefore, this invention provides a retaining bracket for use with an end effector of a surgical instrument to keep the end effector in its initial loading position.

[0005] To address the aforementioned technical problems, this utility model provides the following technical solution: A retaining bracket for an end effector includes: a proximal bracket that mates with a proximal body portion of the end effector, a distal bracket that mates with a distal actuating portion of the end effector, and a joint limiting portion that mates with a joint assembly of the end effector; wherein the proximal bracket and the distal bracket form a non-zero angle in their extending directions, and the joint limiting portion is located in the transition zone between the proximal bracket and the distal bracket.

[0006] In some embodiments of this utility model, the proximal support includes a proximal support body extending along a first direction and at least one set of holding parts connected to the proximal support body. Each set of holding parts includes two opposing holding arms, and the free ends of the holding arms of the multiple sets of holding parts form openings suitable for insertion into the proximal body.

[0007] In some embodiments of this utility model, along the first direction, the two holding arms of each group of holding parts are arranged alternately.

[0008] In some embodiments of this utility model, the distal support includes a distal support body extending along a second direction and a first retaining arm and a second retaining arm connected to the distal support body and disposed opposite to each other, wherein the free ends of the first retaining arm and the second retaining arm form openings suitable for insertion of the distal actuator.

[0009] In some embodiments of this utility model, the first retaining arm and the second retaining arm are located at the distal end of the distal support body and are spaced apart from the joint limiting part.

[0010] In some embodiments of this invention, the proximal end of the first retaining arm forms a limiting end face suitable for cooperating with the working part of the firing member, so as to restrict the firing member from moving to the distal side.

[0011] In some embodiments of this utility model, the joint limiting part includes a limiting body, which is protrudingly disposed inside the bending transition area between the proximal support body and the distal support body. The proximal side of the limiting body abuts against the distal side of the proximal body, and the distal side of the limiting body abuts against the joint assembly.

[0012] In some embodiments of this utility model, the proximal support body is provided with a hand-held portion at the end away from the holding portion, and the hand-held portion includes two hand-held protrusions that protrude outward along the end of the proximal support body.

[0013] In some embodiments of this utility model, the proximal support, the distal support, and the joint limiting part are integrally formed; wherein, the proximal support body and the distal support body are integrally constructed as elongated strip plates bent along the width direction, and the outer periphery of the proximal support body and the distal support body are provided with reinforcing edges extending along their thickness direction.

[0014] In some embodiments of this utility model, the holding arm extends in an arc along the reinforcing line inside the proximal support body, and the first retaining arm and the second retaining arm extend in an arc along the reinforcing line inside the distal support body.

[0015] This utility model also provides an end effector, comprising: a proximal body portion and a distal actuator portion pivotally connected by a joint assembly, and the aforementioned retaining bracket; the retaining bracket is adapted to keep the extension direction of the distal actuator portion and the extension direction of the proximal body portion in a loading position that is not in the same straight line.

[0016] In some embodiments of this utility model, the joint assembly includes a distal connector fixedly connected to the proximal end of the distal actuator, and the distal end of the joint limiting portion is limited and engaged with the distal connector.

[0017] In some embodiments of this utility model, the distal end of the proximal main body is provided with an end cap, and the proximal end of the joint limiting part is limited and matched with the end cap.

[0018] In some embodiments of this utility model, the distal actuator includes a staple cartridge assembly and a staple anvil assembly, the first retaining arm of the retaining bracket abuts against the outer surface of the staple cartridge assembly, and the second retaining arm of the retaining bracket abuts against the outer surface of the staple anvil assembly.

[0019] In some embodiments of this utility model, the distal actuator includes an outer sleeve, and the holding part of the retaining bracket holds the outer sleeve.

[0020] The technical solution of this utility model has the following technical advantages over the prior art: The end effector retaining bracket provided by this utility model has a proximal bracket, a distal bracket, and a joint limiting part that cooperate with the proximal body, distal actuating part, and joint assembly of the end effector, respectively. This can effectively keep the end effector in a loading position where the distal actuating part and the proximal body are not collinear, thus avoiding attitude deviation caused by external forces. Attached Figure Description

[0021] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of this utility model, wherein: Figure 1 A schematic diagram of a surgical instrument equipped with the end effector of this invention; Figure 2 A schematic diagram of the structure of a surgical instrument without the retaining stent of this invention installed; Figure 3 This is a partial structural schematic diagram of a specific embodiment of the end effector of this utility model; Figure 4 This is a partially exploded view of one specific embodiment of the end effector of this utility model; Figure 5 This is a schematic diagram of a specific embodiment of the end effector of this utility model; Figure 6 This is a schematic diagram of a specific embodiment of the end effector of this utility model; Figure 7 This is a schematic diagram of a specific embodiment of the retaining bracket of the end effector of this utility model; Figure 8 This is another structural schematic diagram of a specific embodiment of the holding bracket of the end effector of this utility model. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] In various embodiments of this utility model, "distal / side" refers to the end of the surgical instrument that is far from the operator during operation, while "proximal / side" refers to the end / side of the surgical instrument that is close to the operator during operation.

[0027] The following is a specific embodiment of the end effector for surgical instruments provided by this utility model. Generally, the surgical instruments described herein are endoscopic surgical cutting and anastomosis instruments. However, it should be noted that surgical instruments can also be non-endoscopic surgical cutting and anastomosis instruments, such as open surgical instruments for open surgery.

[0028] Figure 1 , Figure 2 The surgical instrument 100 shown includes a handle assembly 10, an elongated body assembly 20, and an end effector 30. The handle assembly 10 is adapted to allow an operator to manipulate the surgical instrument 100, and the handle assembly 10 can control the movement of the end effector 30 through the elongated body assembly 20 to perform surgical operations, such as clamping / closing, suturing / anastomosing, cutting, etc.

[0029] The end effector 30 of the surgical instrument 100 described above is used to manipulate tissue to perform specific surgical procedures, such as tissue clamping, suturing / anastomosis, and cutting. This end effector 30 is detachably mounted at the distal end of the elongated body assembly 20 of the surgical instrument 100. Figure 3 As shown, the end effector 30 includes a proximal body portion 30a and a distal actuator portion 30b, which are pivotally connected by a joint assembly 38 to realize the bending operation of the end effector 30.

[0030] The distal actuator 30b includes a cartridge assembly 31 and an anvil assembly 32, which are movable relative to each other to close the jaws and clamp tissue. The surfaces of the cartridge assembly 31 and the anvil assembly 32 opposite to each other form clamping surfaces for holding tissue. In one specific embodiment, the anvil assembly 32 can be operably pivoted toward the cartridge assembly 31 until the jaws of the end effector 30 are closed to clamp tissue; the anvil assembly 32 can also be pivoted away from the cartridge assembly 31 until the jaws of the end effector 30 are opened to release tissue. Alternatively, the cartridge assembly 31 of the end effector 30 can be operably pivoted toward the anvil assembly 32 until the jaws of the end effector 30 are closed to clamp tissue; and the cartridge assembly 31 can be operably pivoted away from the cartridge assembly 31 until the jaws of the end effector 30 are opened to release tissue.

[0031] Specifically, such as Figure 3 and Figure 4As shown, the proximal body portion 30a of the end effector 30 is detachably connected to the distal end of the elongated body assembly 20. The proximal body portion 30a includes an elongated outer sleeve 33, a support body 34 disposed within the outer sleeve 33, a firing member 35 slidably disposed within the support body 34, and a bending member 36; wherein, the outer sleeve 33 and the tubular outer shell of the elongated body assembly 20 are aligned along the longitudinal axis C (e.g., ...). Figure 1 It extends in the same direction as shown.

[0032] Reference Figure 4 As shown, in the distal actuator 30b of the end effector 30, the staple cartridge assembly 31 includes a staple cartridge 312, a staple cartridge base 311, and a staple pusher slider 316 disposed in the cavity between the staple cartridge 312 and the staple cartridge base 311. The proximal end of the firing member 35 is connected to the firing rod in the elongated body assembly 20, and the distal end of the firing member 35 abuts against the staple pusher slider 316 and can slide / move integrally along the longitudinal axis to perform corresponding surgical operations. Specifically, the firing member 35 includes an elongated firing beam 351, which can be made of a single piece of deformable material, or preferably of multiple stacked sheets. The distal end of the firing beam 351 is provided with a working part 352, on which a cutting blade 354 is provided for forming an incision in the tissue to be cut during firing. The firing member 35 has a working part 352 shaped as an I-beam structure, with a portion of its area abutting against the slider 316 and sliding integrally toward the distal end of the staple cartridge 312 to perform corresponding surgical operations. For example, when the firing member 35 is driven to move from the proximal end to the distal end, a portion of the working part 352 of the firing member 35 pushes the slider 316 to move distally together. The staple cartridge assembly 31 also includes a staple pusher and suture staples located within the staple cartridge 312. When the firing member 35 is driven to move from the proximal end to the distal end, it pushes the staple pusher slider 316 to move. The staple pusher slider 316 acts on the staple pusher to push the suture staples out of the staple cartridge 312, thereby achieving tissue anastomosis.

[0033] Reference Figure 3 , Figure 4 As shown, the joint assembly 38 includes a distal connector 382 fixedly connected to the distal actuator 30b and a proximal connector (not shown) fixedly connected to the distal end of the proximal main body 30a. Specifically, the proximal connector is fixedly connected to the support body 34 via a mating structure of a positioning protrusion and a positioning slot. The distal connector 382 is divided into upper and lower parts, which are respectively fixedly connected to the staple cartridge assembly 31 and the anvil assembly 32 of the distal actuator 30b via positioning pins.

[0034] To enable this end effector to have a large bending angle, such as Figure 1As shown, when the end effector is in the loading position, the distal actuator 30b has a non-zero initial angle relative to the longitudinal axis C, for example, the initial angle is 30°, 45°, 50°, etc. After the end effector 30 in the loading position is installed on the elongated body assembly 20 of the surgical instrument 100, the distal actuator 30b of the end effector 30 is further bent away from the longitudinal axis C to the maximum angle by operating the bending knob 11 of the operating handle assembly 10. Similarly, after the end effector 30 in the loading position is installed on the elongated body assembly 20 of the surgical instrument 100, the distal actuator 30b of the end effector 30 is further pivoted towards the longitudinal axis C by operating the bending knob 11 of the operating handle assembly 10, and finally forms a 0° or approximately 0° angle with the longitudinal axis C.

[0035] Since the end effector of this invention is positioned at a certain angle between the distal actuation part 30b and the longitudinal axis C in its loading position, in order to reliably maintain the end effector 30 in this loading position when not loaded, such as Figure 5 , Figure 6 As shown, the end effector 30 also includes a retaining bracket 37, which is adapted to keep the extension direction of the distal actuator and the extension direction of the proximal body 30a in a loading position with an angle.

[0036] Specifically, refer to Figure 7 As shown, the retaining bracket 37 includes a proximal bracket 37a, a distal bracket 37b, and a joint limiting portion. The proximal bracket 37a engages with the proximal main body 30a of the end effector 30, the distal bracket 37b engages with the distal actuating part 30b of the end effector 30, and the joint limiting portion engages with the joint assembly 38 of the end effector 30. The extending directions of the proximal bracket 37a and the distal bracket 37b form a non-zero angle, the size of which can be set according to the required loading position of the end effector 30, typically 120°-150°, to ensure that the distal actuating part 30b and the proximal main body 30a are in a non-collinear loading posture. The joint limiting portion is located in the transition zone 37c between the proximal bracket 37a and the distal bracket 37b, and through its limiting engagement with the joint assembly 38, further stabilizes the initial posture of the end effector 30. Through the coordinated action of the proximal support 37a, the distal support 37b and the joint limiting part, the proximal main body 30a, the distal actuator 30b and the joint assembly 38 of the end effector 30 can be limited respectively, so as to realize the stable holding of the end effector 30 in the loading position, avoid its posture deviation due to external force before loading, and improve the convenience and accuracy of the loading process.

[0037] The proximal support 37a includes a proximal support body 371 and at least one set of holding parts. The proximal support body 371 extends along a first direction (i.e., the extension direction of the proximal body 30a, the longitudinal axis direction), and its overall structure is a long strip plate. More specifically, the proximal support body 371 is constructed as a long strip plate with a thinner middle region. The outer periphery of the thin plate is provided with reinforcing edges extending on both sides along its thickness direction. The cross-sectional shape of the reinforcing edges is rectangular. The reinforcing edges can effectively enhance the structural strength and rigidity of the proximal support body 371 and the distal support body 37b, prevent the thinner support body from bending or deforming under force, and extend the service life of the support 37.

[0038] The holding part is connected to the proximal support body 371. Each set of holding parts includes two opposing holding arms 372. The holding arms 372 are formed by an arc extending along the reinforcing edge inside the proximal support body 371. The free ends of the holding arms 372 of multiple sets of holding parts form openings suitable for insertion into the proximal body part 30a. The integrated structure of the holding part and the reinforcing edge can improve its structural strength, ensuring that it is not easy to break or deform during holding or limiting, while simplifying the manufacturing process.

[0039] like Figure 7 , Figure 8 As shown, in one specific embodiment, the holding parts are configured in two groups, spaced apart along the first direction, to enhance the holding stability of the proximal main body 30a. The design of multiple groups of holding parts allows for holding of the proximal main body 30a from multiple positions, improving the firmness of the fit between the proximal support 37a and the proximal main body 30a; the open structure facilitates quick insertion and removal of the proximal main body 30a, improving operational efficiency.

[0040] Specifically, along the first direction, the two holding arms 372 of each holding part are staggered. Specifically, the proximal end of one holding arm 372 is not on the same longitudinal section as the proximal end of the other holding arm 372, while the distal end of the proximal holding arm 372 and the proximal end of the distal holding arm 372 can be on the same longitudinal section or spaced apart. This staggered structure allows the holding arms 372 to form complementary holding areas in the circumferential direction of the proximal main body 30a. The staggered arrangement of the holding arms 372 increases the contact area with the proximal main body 30a, while avoiding stress concentration at the same axial position, thus improving the structural strength and holding stability of the holding part.

[0041] Specifically, the inner wall of the holding arm 372 is formed into an arc shape that matches the shape of the proximal main body 30a. Since the outer sleeve 33 of the proximal main body 30a is cylindrical, and the holding arm 372 is integrally formed into an arc-shaped sleeve structure, the two fit tightly together, which can improve the fitting accuracy between the holding part and the proximal main body 30a, prevent the proximal main body 30a from shaking within the holding part, and enhance the stability of the support 37.

[0042] The distal support 37b includes a distal support body 373, a first retaining arm 374, and a second retaining arm 375. The distal support body 373 extends along a second direction (i.e., the initial extension direction of the distal actuator 30b), and its overall structure is a long strip plate similar in shape to the proximal support 37a, meaning that the middle region of the long strip plate is thinner, and the outer periphery has a reinforcing edge. The first retaining arm 374 and the second retaining arm 375 are connected to the reinforcing edge of the distal support body 373 and are arranged opposite to each other, with their free ends forming openings suitable for insertion of the distal actuator 30b.

[0043] Since the distal actuator 30b includes a staple cartridge assembly 31 and an anvil assembly 32 disposed opposite to each other, in this embodiment, the first retaining arm 374 and the second retaining arm 375 are respectively located on both sides of the staple cartridge assembly 31 and the anvil assembly 32 of the distal actuator 30b. That is, the first retaining arm 374 abuts against the outer surface of the staple cartridge assembly 31, and the second retaining arm 375 abuts against the outer surface of the anvil assembly 32. The opposite arrangement of the first retaining arm 374 and the second retaining arm 375 can limit the distal actuator 30b from both sides. The opening structure formed by the free ends of the first retaining arm 374 and the second retaining arm 375 facilitates the quick insertion and connection of the distal actuator 30b, ensuring the stable placement of the distal actuator 30b in the loading position.

[0044] The first retaining arm 374 and the second retaining arm 375 are located at the distal end of the distal support body 373, that is, the distal surfaces of the first retaining arm 374 and the second retaining arm 375 are flush with the distal surface of the distal support body 373. Meanwhile, the proximal surfaces of the first retaining arm 374 and the second retaining arm 375 are spaced apart from the joint limiting portion, i.e., there is a certain gap between them, to avoid structural interference during the loading of the end effector 30.

[0045] like Figure 7As shown, the proximal end of the first retaining arm 374 forms a limiting end face 374a adapted to cooperate with the working part 352 of the firing member 35. This limiting end face 374a is perpendicular to the movement direction of the working part 352 of the firing member 35. When the working part 352 of the firing member 35 moves distally, the limiting end face 374a can abut against the proximal end of the working part 352, thereby restricting the distal movement of the firing member 35. The limiting end face 374a effectively restricts accidental movement of the firing member 35 during the loading stage, preventing the cutting blade 354 of the firing member 35 from extending beyond the distal actuator 30b due to misoperation, thus improving the safety of the end effector 30.

[0046] Specifically, the proximal support 37a, the distal support 37b, and the joint limiting portion are integrally molded by injection molding. The proximal support body 371 and the distal support body 373 are integrally formed as elongated strips bent along their width. The proximal support body 371 and the distal support body 373 are connected by an obtuse-angle bend.

[0047] The joint limiting portion includes a limiting body 376, which protrudes from the inner side of the bending transition area 37c between the proximal support body 371 and the distal support body 373. The proximal side of the limiting body 376 abuts against the distal side of the proximal body portion 30a. Specifically, the distal end of the proximal body portion 30a is provided with an end cap 39, and the proximal end face of the limiting body 376 abuts against the distal side of the end cap 39. The distal side of the limiting body 376 abuts against the joint assembly 38. Specifically, the distal end of the joint limiting portion engages with the distal connector 382 of the joint assembly 38, i.e., abuts against the proximal side of the distal connector 382. By abutting against the proximal body portion 30a and the joint assembly 38, the limiting body 376 further restricts the relative movement between the proximal body portion 30a and the joint assembly 38, enhancing the overall stability of the end effector 30 in the loading position.

[0048] To facilitate molding, the limiting body 376 is provided with a glue-reducing feature 376a, such as... Figure 7 , Figure 8 As shown, the material reduction feature 376a adopts a material reduction hole structure. The material reduction hole penetrates through the limiting body 376, reducing the material usage and lowering the risk of shrinkage deformation during injection molding, while also reducing the overall weight of the retaining bracket 37.

[0049] To facilitate the operator's gripping of the retaining bracket 37 and its fitting onto the proximal body 30a and distal actuation part 30b of the end effector 30, the proximal bracket body 371 of the retaining bracket 37 has a handhold 377 at the end furthest from the holding part. The handhold 377 includes two handhold protrusions extending outward from the end of the proximal bracket body 371. The two handhold protrusions are symmetrically arranged on both sides of the proximal bracket body 371, and their outer surfaces are provided with anti-slip textures to increase the friction between the hand and the handhold 377, preventing the retaining bracket 37 from slipping during operation and improving the convenience and safety of operation.

[0050] The handgrip protrudes in an arc shape along the reinforcing edge on the outer side of the proximal support body 371, moving away from the plate surface of the proximal support body 371. The arc-shaped protrusion design is ergonomic and facilitates gripping by the operator.

[0051] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A retaining bracket for an end effector, characterized in that, include: A proximal support that mates with the proximal body portion of the end effector, a distal support that mates with the distal actuation portion of the end effector, and a joint limiting portion that mates with the joint assembly of the end effector; The joint limiting portion is located in the transition zone between the proximal support and the distal support, and the proximal support and the distal support extend in different directions.

2. The retaining bracket for an end effector according to claim 1, characterized in that, The proximal support includes a proximal support body extending along a first direction and at least one set of holding parts connected to the proximal support body. Each set of holding parts includes two opposing holding arms, and the free ends of the holding arms of the multiple sets of holding parts form openings suitable for insertion into the proximal body.

3. A retaining bracket for an end effector according to claim 2, characterized in that, Along the first direction, the two holding arms of each group of holding parts are arranged alternately.

4. A retaining bracket for an end effector according to claim 2, characterized in that, The distal support includes a distal support body extending along a second direction and a first retaining arm and a second retaining arm connected to the distal support body and disposed opposite to each other. The free ends of the first retaining arm and the second retaining arm form openings suitable for insertion of the distal actuator.

5. A retaining bracket for an end effector according to claim 4, characterized in that, The first retaining arm and the second retaining arm are located at the distal end of the distal support body and are spaced apart from the joint limiting part.

6. A retaining bracket for an end effector according to claim 5, characterized in that, The proximal end of the first retaining arm forms a limiting end face adapted to mate with the working part of the firing member, so as to restrict the firing member from moving distally.

7. A retaining bracket for an end effector according to claim 4, characterized in that, The joint limiting part includes a limiting body, which is protrudingly disposed inside the bending transition area between the proximal support body and the distal support body. The proximal side of the limiting body abuts against the distal side of the proximal body, and the distal side of the limiting body abuts against the joint assembly.

8. A retaining bracket for an end effector according to claim 2, characterized in that, The proximal support body has a hand-held portion at the end away from the holding portion, and the hand-held portion includes two hand-held protrusions that protrude outward along the end of the proximal support body.

9. A retaining bracket for an end effector according to claim 4, characterized in that, The proximal support, the distal support, and the joint limiting part are integrally formed; wherein, the main body of the proximal support and the main body of the distal support are integrally constructed as long strip plates bent along the width direction, and the outer periphery of the main body of the proximal support and the main body of the distal support are provided with reinforcing edges extending along their thickness direction.

10. A retaining bracket for an end effector according to claim 9, characterized in that, The holding arm extends in an arc along the inner reinforcing line of the proximal support body, and the first retaining arm and the second retaining arm extend in an arc along the inner reinforcing line of the distal support body.

11. An end effector, characterized in that, include: The proximal body portion and the distal actuator portion are pivotally connected by a joint assembly, and the retaining bracket as described in any one of claims 1-9; The retaining bracket is adapted to keep the extension direction of the distal actuator and the extension direction of the proximal body in a loading position that is not on the same straight line.

12. An end effector according to claim 11, characterized in that, The joint assembly includes a distal connector fixedly connected to the proximal end of the distal actuator, and the distal end of the joint limiting portion is limited and engaged with the distal connector.

13. An end effector according to claim 11, characterized in that, The distal end of the proximal main body is provided with an end cap, and the proximal end of the joint limiting part is limited and engaged with the end cap.

14. An end effector according to claim 11, characterized in that, The distal actuator includes a staple cartridge assembly and a staple anvil assembly. The first retaining arm of the retaining bracket abuts against the outer surface of the staple cartridge assembly, and the second retaining arm of the retaining bracket abuts against the outer surface of the staple anvil assembly.

15. An end effector according to claim 11, characterized in that, The distal actuator includes an outer sleeve, and the holding part of the retaining bracket holds onto the outer sleeve.

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