Surgical instruments

Abstract

This invention discloses a surgical instrument, including a wrench and a limiting mechanism. The limiting mechanism includes a stop structure and an abutment member. The stop structure has a stop portion. The abutment member has multiple guide units, each guide unit including a first limiting portion, a second limiting portion, and a first guide groove. The second limiting portion of each guide unit communicates with the first limiting portion of the adjacent guide unit through a second guide groove. When the stop portion is located in the first limiting portion of one of the guide units, in response to applying force to the wrench, the wrench moves forward, the stop portion enters the second limiting portion of one of the guide units and abuts against the second limiting portion, the wrench stops its forward movement and stops at the current position. In this invention, when the wrench of the surgical instrument completes a forward stroke and reaches the corresponding position, the wrench is forcibly stopped. The user must release the wrench and press it again to allow it to continue the next forward stroke, thus enabling the user to quickly and accurately press the wrench to the desired position.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a surgical instrument. Background Technology

[0002] Surgical instruments include a handle assembly, which in turn includes a wrench. When using a surgical instrument, the user must press the wrench to move it, thereby putting the surgical instrument into different states.

[0003] A wrench has multiple strokes; after each stroke, the wrench reaches a corresponding position. After completing a stroke and reaching its designated position, the surgical instrument enters a different state. Once the surgical instrument enters a state, the user typically needs to complete a corresponding surgical procedure or observe the current situation to determine if it's suitable to proceed to the next step. Therefore, after the wrench completes a stroke and reaches a corresponding position, causing the surgical instrument to enter a state, the wrench must stop moving to prevent the instrument from immediately entering the next state. After the user completes the corresponding surgical procedure and manipulates the wrench again, it begins the next stroke from its current position, causing the surgical instrument to enter the next state.

[0004] Some existing surgical instruments lack a clearly defined position after each stroke of the wrench, making it difficult for users to quickly and accurately press the wrench to the desired position. This can lead to users not stopping pressing the wrench after completing one stroke, causing it to immediately move to the next stroke. Consequently, the surgical instrument enters one state before the user has had time to complete the corresponding surgical steps or observe and confirm, and the instrument has already moved to the next state. This necessitates the user restarting the operation of the medical instrument, causing inconvenience.

[0005] Based on the above, it is necessary to further improve the surgical instruments in the existing technology. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a surgical instrument in which the wrench can be forcibly stopped after completing a certain stroke and reaching the corresponding position, thereby solving the technical problem that it is difficult for users to press the wrench to the corresponding position quickly and accurately.

[0007] This invention is achieved through the following technical solution: a surgical instrument, comprising a handle assembly and a limiting mechanism, wherein the handle assembly includes a handle housing and a wrench movably connected to the handle housing; the limiting mechanism includes:

[0008] A stop structure is provided in the handle housing, and the stop structure has a stop portion;

[0009] The abutting member has multiple guiding units, each guiding unit including a first limiting part, a second limiting part and a first guide groove communicating between the first limiting part and the second limiting part; the second limiting part of each guiding unit is connected to the first limiting part of the adjacent guiding unit through the second guide groove;

[0010] When the stop portion is located in the first limiting portion of one of the guide units, in response to applying force to the wrench, the wrench moves forward and drives the abutment to move linearly in a first direction and rotate about its own axis, such that the stop portion enters the second limiting portion of the guide unit from the first limiting portion of one of the guide units via the first guide groove of the guide unit and abuts against the second limiting portion, so that the abutment stops moving in the first direction, thereby stopping the wrench from moving forward and stopping at the current position;

[0011] When the stop portion is located in the second limiting portion of one of the guide units, in response to the removal of force applied to the wrench, the wrench moves in the opposite direction, and the abutment moves in a second direction opposite to the first direction, such that the stop portion enters from the second limiting portion of one of the guide units into the first limiting portion of the adjacent guide unit via the second guide groove.

[0012] Furthermore, the limiting mechanism also includes an elastic element, which is compressed and stores energy when the abutment moves along the first direction to provide energy for the movement of the abutment along the second direction.

[0013] Furthermore, each of the first guide grooves extends obliquely along the circumferential direction of the abutment, so that when the stop portion is located in the first limiting portion of one of the guide units, the abutment moves linearly in the first direction in response to the forward movement of the wrench while rotating about its own axis.

[0014] Furthermore, each of the second guide grooves extends axially along the abutment member.

[0015] Furthermore, a first stop wall is provided between the first guide groove and the first limiting part; in response to the movement of the abutting member along the first direction, the stop part moves from the first limiting part to the first guide groove along the first stop wall.

[0016] Furthermore, the stop structure includes a receiving cylinder and a pin, the abutting member is movably connected to the receiving cylinder, the pin is disposed in the receiving cylinder, and the pin constitutes the stop portion.

[0017] Furthermore, an elastic element is provided between the pin and the receiving cylinder, and the elastic element biases the pin toward the abutment.

[0018] Furthermore, the wrench has an open position, a first intermediate position, a second intermediate position, and a closed position;

[0019] When the wrench is in the open position, the stop portion is located in the first limiting portion of one of the guide units. In response to applying force to the wrench, the wrench moves forward and drives the abutment to move linearly along the first direction and rotate around its own axis until the stop portion abuts against the second limiting portion of the guide unit in which it is located, at which point the wrench reaches the first intermediate position.

[0020] When the wrench is in the first intermediate position, in response to the removal of force applied to the wrench, the wrench moves in the opposite direction to the second intermediate position, and the abutment moves in a second direction opposite to the first direction, so that the stop portion enters the first limiting portion of the adjacent guide unit;

[0021] When the wrench is in the second intermediate position, in response to applying force to the wrench, the wrench moves forward and drives the abutment to move linearly along the first direction and rotate around its own axis until the stop portion enters the second limiting portion of the guide unit in which it is located, at which point the wrench reaches the closed position.

[0022] Furthermore, when the wrench is in the closed position, in response to the removal of force applied to the wrench, the wrench moves in the opposite direction to the open position, and the stop portion moves from the second limiting portion of the guide unit in which it is located into the first limiting portion of the adjacent guide unit.

[0023] Furthermore, the surgical instrument also includes a jaw assembly, a clamping magazine, and a clamp delivery drive mechanism, the clamping magazine having a clamp; in response to the wrench moving from the open position to the first intermediate position, the clamp delivery drive mechanism drives the clamp to move from the clamping magazine into the jaw assembly.

[0024] Furthermore, the surgical instrument also includes a jaw drive mechanism; in response to the wrench moving from the second intermediate position to the closed position, the jaw drive mechanism drives the jaw assembly to close so that the clamps in the jaw assembly are closed.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: In the surgical instrument of the present invention, when the forward movement of the wrench causes the stop part to enter the second limit part of one of the guide units from the first limit part of the guide unit, the wrench completes a forward stroke and reaches the corresponding position. At this time, the wrench is forcibly stopped, and the user must release the wrench and press it again to allow the wrench to continue the next forward stroke. Thus, the user can quickly and accurately press the wrench to the required corresponding position. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the surgical instrument provided in a specific embodiment of the present invention;

[0027] Figure 2A is a schematic diagram of the limiting mechanism provided in a specific embodiment of the present invention;

[0028] Figure 2B is a schematic diagram of the limiting mechanism provided in a specific embodiment of the present invention, wherein part of the receiving cylinder has been removed;

[0029] Figure 3 This is a schematic diagram of the limiting mechanism provided in a specific embodiment of the present invention, wherein the accommodating cylinder is not shown;

[0030] Figure 4 This is a plan view of the guide unit of the limiting mechanism provided in a specific embodiment of the present invention;

[0031] Figure 5 This is a structural schematic diagram of the abutment member at a first angle provided in a specific embodiment of the present invention;

[0032] Figure 6 This is a structural schematic diagram of the abutment member at a second angle provided in a specific embodiment of the present invention;

[0033] Figure 7 This is a structural schematic diagram of the abutment member from a third angle according to a specific embodiment of the present invention;

[0034] Figure 8 This is a structural schematic diagram of the abutment member from the fourth angle provided in a specific embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the clamping forceps provided in a specific embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the clamp provided in a specific embodiment of the present invention, wherein part of the housing has been removed and the wrench is in the open position;

[0037] Figure 11 This is a schematic diagram of the clamping pliers provided in a specific embodiment of the present invention, wherein part of the housing has been removed and the wrench is located in the first middle position;

[0038] Figure 12 This is a schematic diagram of the clamping pliers provided in a specific embodiment of the present invention, wherein part of the housing has been removed and the wrench is located in the second middle position;

[0039] Figure 13 This is a schematic diagram of the clamping pliers provided in a specific embodiment of the present invention, wherein part of the housing has been removed and the wrench is in the closed position;

[0040] Figure 14 This is a cross-sectional view of the clamp provided in a specific embodiment of the present invention, wherein the wrench is in the open position;

[0041] Figure 15 This is a cross-sectional view of the clamping pliers provided in a specific embodiment of the present invention, wherein the wrench is in the closed position;

[0042] Figures 16A-16B This is a schematic diagram of the structure of the clamp box provided in a specific embodiment of the present invention;

[0043] Figure 17 This is a schematic diagram of the clip provided in a specific embodiment of the present invention;

[0044] Figures 18A-18B This is a cross-sectional view of a portion of the clamping forceps provided in a specific embodiment of the present invention, wherein the clamping component is not in contact with the clamp;

[0045] Figures 19A-19B This is a cross-sectional view of a portion of the clamping forceps provided in a specific embodiment of the present invention, wherein the clamping component abuts against the clamp and pushes the clamp into the jaw assembly;

[0046] Figure 20-21 This is a schematic diagram of the structure of the guide pivot provided in a specific embodiment of the present invention;

[0047] Figure 22 This is a schematic diagram of the structure of the wrench provided in a specific embodiment of the present invention;

[0048] Figure 23 This is a schematic diagram of the guiding channel provided in a specific embodiment of the present invention;

[0049] Figure 24 This is a schematic diagram of the wrench, guide pivot, and anti-reverse mechanism provided in a specific embodiment of the present invention, wherein the wrench is in the open state;

[0050] Figure 25 This is a schematic diagram of the wrench, guide pivot and anti-reverse mechanism provided in a specific embodiment of the present invention. At this time, the clamping pliers are in the clamping completed state.

[0051] Figure 26-27This is a schematic diagram of the path switching component provided in a specific embodiment of the present invention;

[0052] Figure 28 This is a schematic diagram of the structure of the first head shell provided in a specific embodiment of the present invention;

[0053] Figure 29A This is a state diagram of the path switching component when the wrench is in the open position in a specific embodiment of the present invention;

[0054] Figure 29B This is a state diagram of the path switching component before the wrench moves from the open position to the closed position in a specific embodiment of the present invention;

[0055] Figure 30A This is a state diagram of the path switching component when the wrench is in the closed position in a specific embodiment of the present invention;

[0056] Figure 30B This is a state diagram of the path switching component before the wrench resets and reaches the open position in a specific embodiment of the present invention.

[0057] The reference numerals in the above figures are as follows:

[0058] 1-Operating component; 2-Head housing; 3-Handle housing; 4-Wrench; 5-Shaft assembly; 6-Clamping chamber; 7-Bottom; 8-First side; 9-Second side; 10-Inlet; 11-First transverse barb; 12-Second transverse barb; 13-Angled end; 14-Jaw assembly; 15-First clamping arm; 16-Second clamping arm; 22-Clamp; 23-First clamping arm; 25-First ear; 26-Connecting part; 27-Second clamp Arm; 29-Second Ear; 30-Engaging Part; 31-Push Clamp Block; 32-Jaw Drive Tube; 33-Rib; 34-Baffle; 35-Sleeve; 36-First Reset Component; 37-Base; 38-Guide Groove; 39-Guide Surface; 40-Feeding Rod; 41-Elastic Rod; 42-Feeding Clamp Block; 43-Feeding Clamp Drive Tube; 44-Groove; 45-Third Reset Component; 46-Push Clamp Seat; 62-Seat Body; 63-First Clutch Component; 64-First... Two-clutch assembly; 65-Guide post; 66-First guide surface; 67-Second guide surface; 68-Fourth reset component; 69-Upper rack; 70-Lower rack; 71-Intermediate component; 72-Spring; 73-Guide pivot component; 74-Offset spring; 75-Guide component; 76-Pivot part; 77-Force-receiving part; 78-Guiding part; 79-Anti-reverse part; 80-First rotating arm; 81-Second rotating arm; 82-Third rotating arm; 83-Grip part; 8 4-Push claw; 85-Pivot end; 86-Guide channel; 87-Main channel; 88-Opening; 89-Slave channel; 90-First head housing; 91-Path switching component; 92-Pivot part; 93-First trigger part; 94-Second trigger part; 95-Execution part; 96-Protrusion; 97-First recess; 98-Second recess; 99-First guide rib; 100-First inclined surface; 101-Second guide rib; 102-Second inclined surface;

[0059] 17-Stop structure; 18-Abutting part; 19-Abutting end; 20-Connecting end; 21-Accommodating cylinder; 24-Pin shaft; 28-Elastic element; 47-Elastic element; 48-First limiting part; 49-Second limiting part; 50-First guide groove; 51-Second guide groove; 53-First stop wall; 54-Guiding unit; 55-Second stop wall; 56-First wall; 57-Blocking wall; 58-Second wall; 59-Guiding wall. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0061] It is important to understand that the terms "proximal," "posterior," "distal," and "anterior" used in this article are relative to the clinician manipulating the handle of the clamp. "Proximal" and "posterior" refer to the part closer to the clinician, while "distal" and "anterior" refer to the part farther from the clinician. That is, the handle assembly is the proximal end, and the jaw assembly is the distal end. For example, the proximal end of a component refers to the end relatively closer to the handle assembly, and the distal end refers to the end relatively closer to the jaw assembly.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases.

[0063] The term “axial direction of sleeve 35” as used in this article refers to the length direction of sleeve 35.

[0064] Referring to Figure 2A, in this embodiment, both the first direction and the second direction are vertical, with the first direction from top to bottom and the second direction from bottom to top.

[0065] refer to Figure 1 This embodiment provides a surgical instrument, including a handle assembly and a limiting mechanism. The handle assembly includes a handle housing 3 and a wrench 4 movably connected to the handle housing 3. The wrench 4 has forward and reverse movements, and the directions of the forward and reverse movements are opposite. The wrench 4 has at least two forward strokes. After completing one forward stroke, it cannot continue to perform forward movement and must first perform a reverse movement before it can continue to perform the next forward stroke, as described in detail below.

[0066] refer to Figure 1 -2. The limiting mechanism includes a stop structure 17 and an abutment member 18. The abutment member 18 has multiple guide units 54. Each guide unit 54 is connected to its adjacent guide unit 54 via a second guide groove 51. Referring to Figures 2-3, the stop structure 17 has a stop portion. When the abutment member 18 moves, the stop portion of the stop structure 17 can enter from one of the guide units 54 into another adjacent guide unit 54 via the second guide groove 51.

[0067] Specifically, referring to Figures 2A-4, each guide unit 54 includes a first limiting portion 48, a second limiting portion 49, and a first guide groove 50 connecting the first limiting portion 48 and the second limiting portion 49. In other words, the first limiting portion 48 and the second limiting portion 49 of each guide unit 54 are connected through the first guide groove 50 of the guide unit 54. The second limiting portion 49 of each guide unit 54 is connected to the first limiting portion 48 of the adjacent guide unit 54 through a second guide groove 51. Figure 4 The Lieutenant General's guidance unit 54 is illustrated in a plan view. Figure 4 The first limiting part 48 of the guide unit located on the left is not connected to the second limiting part 49 of the guide unit located on the right. In fact, each guide unit 54 of the abutment member 18 is connected to its adjacent guide unit 54.

[0068] Referring to Figure 2A-8, in the initial state, the stop is movably located in the first limiting part 48 of one of the guide units 54. In response to the application of force to the wrench 4, the wrench 4 moves forward and drives the abutment 18 to move linearly in the first direction and rotate about its own axis, so that the stop enters the second limiting part 49 of the guide unit 54 from the first limiting part 48 of one of the guide units 54 through the first guide groove 50 of the guide unit 54 and abuts against the second limiting part 49, so that the abutment 18 stops moving in the first direction, thereby stopping the forward movement of the wrench 4 and stopping at the current position. Thus, a forward stroke of the wrench 4 is completed, and the surgical instrument enters a state.

[0069] When the stop is located in the second limiting part 49 of one of the guide units 54, in response to the removal of force applied to the wrench 4, the wrench 4 moves in the reverse direction, and the abutment 18 moves in a second direction opposite to the first direction, so that the stop enters the first limiting part 48 of the adjacent guide unit 54 from the second limiting part 49 of one of the guide units 54 through the corresponding second guide groove 51. At this time, when force is applied to the wrench 4, the wrench 4 can move forward again to complete the next forward stroke.

[0070] In this embodiment of the limiting mechanism, when the stop portion enters the second limiting portion 49 of the guide unit 54, the stop portion abuts against the second limiting portion 49, causing the abutting member 18 to stop moving. At this time, the abutting member 18 can no longer continue to move along the first direction and must move along the second direction until the stop portion enters the first limiting portion 48 of the next guide unit 54 before the abutting member 18 can move along the first direction again. Thus, during the movement of the abutting member 18, when the stop portion enters each second limiting portion 49, the abutting member 18 will be forcibly stopped from moving along the first direction. Therefore, for surgical instruments using the limiting mechanism of this embodiment, the limiting mechanism can provide at least one forced stop position during their movement, making the movement of surgical instruments using the limiting mechanism of this embodiment easier to control and easier for users to use.

[0071] In this embodiment of the surgical instrument, when the forward movement of the wrench 4 causes the stop part to enter the second limit part 49 of one of the guide units 54 from the first limit part 48 of the guide unit 54, the wrench 4 completes a forward stroke and reaches the corresponding position. At this time, the wrench 4 is forcibly stopped. The user must release the wrench 4 and press it again to allow the wrench 4 to continue the next forward stroke. This allows the user to quickly and accurately press the wrench 4 to the required corresponding position.

[0072] Referring to Figure 2A-3, the limiting mechanism also includes an elastic element 47, which is connected to the abutment 18. The elastic element 47 is compressed and stores energy when the abutment 18 moves in the first direction to provide energy for the movement of the abutment 18 in the second direction.

[0073] refer to Figure 5-8 Each of the first guide grooves 50 extends upward at an angle along the circumference of the abutment member 18 (to... Figure 8 (For reference), when the stop portion is located in the first limiting portion 48 of one of the guide units 54, the abutment member 18 moves linearly in the first direction in response to the forward movement of the wrench 4 and rotates around its own axis, so that the stop portion enters the second limiting portion 49 of the guide unit 54 from the first limiting portion 48 of one of the guide units 54 through the first guide groove 50 of the guide unit 54 and abuts against the second limiting portion 49.

[0074] by Figure 7 For reference, when the stop is located in the first limiting part 48 of one of the guide units 54, the abutment 18 moves linearly in the first direction in response to the forward movement of the wrench 4 while rotating clockwise around its own axis.

[0075] Each second guide groove 51 extends axially along the abutment 18, so that when the stop portion is located in the second limiting portion 49 of one of the guide units 54, the abutment 18 moves linearly in the second direction in response to the reverse movement of the wrench 4.

[0076] A first stop wall 53 is provided between the first guide groove 50 and the first limiting part 48. For details, refer to... Figure 5-6 Each second guide groove 51 penetrates the upper side wall of one of the first guide grooves 50 and communicates with the corresponding first limiting part 48. The bottom wall of the second guide groove 51 is flush with the side wall of the first guide groove 50 at the penetration point. The side wall of the first guide groove 50 at the penetration point protrudes relative to the bottom wall of the first guide groove 50. Thus, the side wall of the penetration point of each first guide groove 50 forms a first stop wall 53.

[0077] refer to Figure 6 When the stop portion is located in the first limiting portion 48 of one of the guide units 54, in response to the linear movement of the abutment member 18 in the first direction and its rotation about its own axis, the stop portion enters the first guide groove 50 of the guide unit 54 from the first limiting portion 48 of one of the guide units 54 along the first stop wall 53 and enters the second limiting portion 49 of the guide unit 54 through the first guide groove 50, but does not enter the second limiting portion 49 of the other guide unit 54 along the second guide groove 51 that communicates with the first limiting portion 48 where it is located.

[0078] refer to Figure 5-7 One end of the second guide groove 51 penetrates a portion of the sidewall of one of the first guide grooves 50 and communicates with the first limiting part 48. The other end of some of the second guide grooves 51 penetrates the lower sidewall of another first guide groove 50 and continues to extend on the bottom wall of the other first guide groove 50 to communicate with the second engaging part, thereby forming a second stop wall 55 at the junction of the second guide groove 51 and the other first guide groove 50. Each second guide groove 51 may be provided with a second stop wall 55, or some of the second guide grooves 51 may be provided with a second stop wall 55.

[0079] refer to Figure 5 When the abutment 18 is located in the second limiting part 49 of one of the guide units 54, in response to the movement of the abutment 18 in the second direction, the stop part enters the second guide groove 51 from the second limiting part 49 of one of the guide units 54 along the second stop wall 55 and enters the first limiting part 48 of the other guide unit 54 via the second guide groove 51.

[0080] Referring to Figures 2-4, the stop structure 17 includes a receiving cylinder 21 and a pin 24. An abutment 18 is movably connected to the receiving cylinder 21. Specifically, the abutment 18 is partially housed within the receiving cylinder 21 and is movable relative to it. An elastic element 47 is disposed within the receiving cylinder 21 and between the receiving cylinder 21 and the abutment 18. The pin 24 is disposed within the receiving cylinder 21, forming the stop portion. One end of the pin 24 is connected to the receiving cylinder 21. An elastic element 28 is disposed between the pin 24 and the receiving cylinder 21, biasing the pin 24 toward the abutment 18, so that the other end of the pin 24 is movably located within the guide structure of the abutment 18.

[0081] In this embodiment, the abutment member 18 is cylindrical. Multiple guide structures are provided on the surface of the abutment member 18. During the movement of the abutment member 18, the pin 24 can enter an adjacent guide unit 54 from one guide unit 54 via the second guide groove 51. Multiple pins 24 can be provided; when one pin 24 engages in one guide structure, another pin 24 engages in another guide structure, making the movement of the abutment member 18 more stable.

[0082] The following section uses a clamp as an example to provide a more detailed description of the surgical instruments in this embodiment.

[0083] refer to Figure 9 The present invention provides a clamping forceps, specifically a continuous clamping forceps, for applying clamps 22 to tissues or blood vessels. In terms of overall positional relationship, the clamping forceps includes an operating component 1, a lever assembly 5 extending from the operating component 1, a transmission mechanism, a clamping chamber 6, a limiting mechanism in this embodiment, and a jaw assembly 14 disposed at the distal end of the lever assembly 5.

[0084] Operating component 1 includes a main body and a wrench 4. The main body includes a housing, to which the wrench 4 is movably connected. The housing is divided into a head housing and a handle housing 3 extending from the lower side of the head housing, and the handle housing 3 and the wrench 4 together form a handle assembly. The user can hold the handle housing 3 with one hand and pull the wrench 4 with their fingers, causing the wrench 4 to move relative to the main body, thereby driving the transmission mechanism.

[0085] The wrench 4 has an open position, a first intermediate position, a second intermediate position, and a closed position. The first forward stroke of the wrench 4 is when it moves forward from the open position to the first intermediate position; the first reverse stroke of the wrench 4 is when it moves backward from the first intermediate position to the second intermediate position; the second forward stroke of the wrench 4 is when it moves forward from the second intermediate position to the closed position; and the second reverse stroke of the wrench 4 is when it moves backward from the closed position to the open position.

[0086] The transmission mechanism includes a clamp delivery drive mechanism and a jaw drive mechanism. In response to the wrench 4 moving from the open position to the first intermediate position, the clamp delivery drive mechanism drives the clamp 22 of the clamp chamber 6 to move into the jaw assembly 14, at which point the clamping forceps enters the clamp delivery completed state. In response to the wrench 4 moving from the second intermediate position to the closed position, the jaw drive mechanism drives the jaw assembly 14 to close, causing the clamp 22 held in the jaw assembly 14 to close and clamp the tissue or blood vessel, at which point the clamping forceps enters the clamping completed state.

[0087] refer to Figure 10 and combined Figure 4-8 When the wrench 4 is in the open position, the stop is movably located in the first limiting part 48 of one of the guide units 54. In response to applying force to the wrench 4, the wrench 4 moves forward and drives the abutment 18 to move linearly and rotate in the first direction, so that the stop enters the second limiting part 49 of the guide unit 54 from the first limiting part 48 of one of the guide units 54 through the first guide groove 50 of the guide unit 54 and abuts against the second limiting part 49. As a result, the abutment 18 stops moving in the first direction, and the wrench 4 stops at the first intermediate position. Thus, the wrench 4 has completed its first forward stroke and is forcibly stopped at the first intermediate position required by the user. At this time, the clamp 22 is sent to the jaw assembly 14 by the clamping drive mechanism, and the clamping clamp is in the clamping completed state. During the process of the wrench 4 moving forward from the open position to the first intermediate position, the elastic member 47 is compressed and stores energy.

[0088] refer to Figure 11 and combined Figure 4-8 When the wrench 4 is in the first intermediate position, in response to the removal of the force applied to the wrench 4, the wrench 4 moves in the opposite direction to the second intermediate position. The elastic member 47 releases energy to drive the abutment member 18 to move linearly in the second direction, so that the stop portion enters the first limit portion 48 of the adjacent guide unit 54 from the second limit portion 49 of one of the guide units 54 through the corresponding second guide groove 51.

[0089] When the wrench 4 is in either the first or second intermediate position, the clamp 22 remains within the jaw assembly 14. When the wrench is in the first intermediate position, the user can adjust the angle of the jaw assembly 14 to align the clamp 22 within the jaw assembly 14 with the target tissue or blood vessel. The user can also release the wrench 4 to remove the force applied, placing the wrench 4 in the second intermediate position, which makes it easier for the user to adjust the angle of the jaw assembly 14.

[0090] refer to Figure 12 and combined Figure 4-8When the wrench 4 is in the second intermediate position, in response to the application of force to the wrench 4, the wrench 4 moves forward and drives the abutment member 18 to move linearly and rotate in the first direction until the wrench 4 reaches the closed position, so that the stop part enters the second limiting part 49 of the guide unit 54 from the first limiting part 48 of the guide unit 54 through the first guide groove 50 of the guide unit 54. When the wrench 4 reaches the closed position, the wrench 4 has completed its second forward stroke, the clamp 22 in the jaw assembly 14 is closed and clamps the tissue or blood vessel, and the clamping forceps enters the clamping completion state. During the process of the wrench 4 moving forward from the second intermediate position to the closed position, the elastic member 47 is compressed and stores energy.

[0091] Because of the limiting mechanism, when the wrench 4 completes its first forward stroke and reaches the first intermediate position (the clamp is in the clamping completed state), the stop part abuts against one of the second limiting parts 49 of the abutment member 18, preventing the wrench 4 from continuing to move. It must be released to return the wrench 4 to the second intermediate position, and then pressed again to allow the wrench 4 to perform the second forward stroke to reach the closed position. This allows the user to quickly and accurately press the wrench 4 to the first intermediate position, avoiding the wrench 4 being directly pressed to the closed position, which would cause the clamp 22 to close before being aligned with the target tissue or blood vessel. This allows the user to adjust the angle of the jaw assembly 14 when the wrench reaches the first or second intermediate position so that the clamp 22 is aligned with the target tissue or blood vessel, thereby accurately applying the clamp 22 to the target tissue or blood vessel, improving the ease of operation and reliability of the clamp.

[0092] refer to Figure 13 and combined Figure 4-8 When the wrench 4 is in the closed position, in response to the removal of force applied to the wrench 4, the wrench 4 moves in the opposite direction to the open position. The elastic element 47 releases energy to drive the abutment 18 to move in the second direction, so that the stop portion moves from the second limiting portion 49 of the guide unit 54 where it is located into the first limiting portion 48 of the adjacent guide unit 54 via the corresponding second guide groove 51. During the process of the wrench 4 moving from the closed position to the open position, the jaw assembly 14 opens, and the clamp 22 held in the tissue or blood vessel disengages from the jaw assembly 14, as described in detail below.

[0093] Referring to Figures 2-3, the abutment 18 has a holding end 19 and a connecting end 20 along a first direction, with the connecting end 20 of the abutment 18 located within the receiving cylinder 21. At least when the wrench 4 is in the open position and the second intermediate position, the holding end 19 of the abutment 18 is located outside the receiving cylinder 21, so that the wrench 4 can abut against the holding end 19 of the abutment 18 during forward movement to drive the abutment 18 to move.

[0094] To more clearly describe the relative movement between the stop and the multiple guide units 54 of the contact member 18 during the movement of the wrench, three of the guide units 54 of the contact member 18 are named the first guide unit, the second guide unit, and the third guide unit, respectively.

[0095] During the process of wrench 4 moving from the open position to the first intermediate position, the stop part engages with the first guide unit. During the process of wrench 4 moving from the first intermediate position to the second intermediate position, the stop part enters the second guide unit. During the process of wrench 4 moving from the second intermediate position to the closed position, the stop part engages with the second guide unit. During the process of wrench 4 moving from the closed position to the open position, the stop part enters the third guide unit. Specifically:

[0096] In response to the wrench 4 moving forward from the open position to the first intermediate position, the stop portion moves from the first limiting portion 48 of the first guide unit into the second limiting portion 49 of the first guide unit via the first guide groove 50 of the first guide unit.

[0097] In response to the wrench 4 moving in the opposite direction from the first intermediate position to the second intermediate position, the stop portion enters the first limiting portion 48 of the second guide unit from the second limiting portion 49 of the first guide unit via the second guide groove 51 between the first guide unit and the second guide unit.

[0098] In response to the wrench 4 moving forward from the second intermediate position to the closed position, the stop portion enters the second limit portion 49 of the second guide unit from the first limit portion 48 of the second guide unit via the first guide groove 50 of the second guide unit.

[0099] In response to the wrench 4 moving from the closed position to the open position, the stop portion moves from the second limiting portion 49 of the second guide unit into the first limiting portion 48 of the third guide unit via the second guide groove 51 between the second guide unit and the third guide unit.

[0100] The extension length of the second guide groove 51 between the first and second guide units is adapted to the movement distance of the wrench 4 from the first intermediate position to the second intermediate position. The extension length of the second guide groove 51 between the second and third guide units is adapted to the movement distance of the wrench 4 from the closed position to the open position. In practical applications, the length of each second guide groove 51 of the limiting mechanism can be adjusted according to the movement law of the wrench 4.

[0101] The first limiting part 48 and the second limiting part 49 of the aforementioned guide unit 54 are both composed of grooves. For example, when the stop part moves into the first limiting part 48, the stop part enters the groove constituting the first limiting part 48 and abuts against the groove.

[0102] It should be noted that in the description of the limiting mechanism, the "wrench in the open position" refers to a range of positions. Specifically, initially, the user does not operate the wrench, and the wrench is in the fully open position. During the process of the user operating the wrench 4 to move it from the fully open position to its contact with the abutment 18, the various positions of the wrench 4 during this process, the fully open position, and the position of contact with the abutment 18 are all considered the open positions of the wrench.

[0103] refer to Figure 14-16B A clamping chamber 6 is disposed on the shaft assembly 5. The proximal end of the clamping chamber 6 is connected to the main body of the operating assembly 1, and the distal end of the clamping chamber 6 is connected to the jaw assembly 14. Before clamping, the clamp 22 is placed in the clamping chamber 6. (Reference) Figure 16A The clamping chamber 6 contains multiple clamps 22, arranged sequentially from the far end to the near end of the clamping chamber 6, namely the first clamp, the second clamp, and so on, up to the Nth clamp. The first clamp is closest to the far end of the clamping chamber 6 and is fed into the jaw assembly 14 first. The clamps 22 other than the first clamp in the clamping chamber 6 are defined as the other clamps 22. The clamping chamber 6 includes M workstations, arranged sequentially from the far end to the near end of the clamping chamber 6, namely the first workstation, the second workstation, ..., the Mth workstation. The first clamp is located at the foremost first workstation, and the second to the Nth clamps are arranged sequentially at the second to the Nth workstations. M ≥ 2, M ≥ N.

[0104] Please refer to Figure 17 The clip 22 includes a first clamping arm 23, a second clamping arm 27, and a connecting portion 26 located between the first clamping arm 23 and the second clamping arm 27. The connecting portion 26 is flexible, allowing the first clamping arm 23 and the second clamping arm 27 to pivot relative to each other. One end of the first clamping arm 23 is connected to the connecting portion 26, and the other end is provided with two first ears 25, one on one side of the first clamping arm 23 and the other on the opposite side. One end of the second clamping arm 27 is connected to the connecting portion 26, and the other end is provided with an engaging portion 30, specifically, the engaging portion 30 is a curved C-shaped hook. Near the engaging portion 30, the second clamping arm 27 is provided with two second ears 29, one on one side of the second clamping arm 27 and the other on the opposite side.

[0105] The two first ear portions 25 are elastic and can deform, allowing the engaging portion 30 of the second clamping arm 27 to engage between the two first ear portions 25 of the first clamping arm 23. Specifically, under the drive of external force, the first clamping arm 23 and the second clamping arm 27 approach each other, ultimately engaging the engaging portion 30 between the two first ear portions 25, thus fully clamping the first clamping arm 23 and the second clamping arm 27, effectively clamping and stopping the bleeding of the blood vessels or tissue placed between the first clamping arm 23 and the second clamping arm 27.

[0106] refer to Figures 16A-16B The clamping chamber 6 includes a bottom 7 extending axially along the sleeve 35 and opposing first and second side portions 8 and 9. When the clamp 22 is installed in the clamping chamber 6, it is compressed due to the size and internal space of the clamping chamber 6. Specifically, the first clamping arm 23 of the clamp 22 abuts against the first side portion 8, and the second clamping arm 27 abuts against the second side portion 9, such that the two clamping arms are compressed but not compressed into a closed state, that is, the two clamping arms of the clamp 22 are close to each other but not engaged.

[0107] Multiple abutment components are formed along the length of the bottom 7 of the clamping chamber 6, with one abutment component at each workstation. (Reference) Figure 16B Each abutment component includes a first transverse barb 11 and a second transverse barb 12. The first transverse barbs 11 are arranged in one row, and the second transverse barbs 12 are arranged in another row. The first transverse barbs 11 and the second transverse barbs 12 are arranged in two rows on the bottom 7. The first transverse barbs 11 are located near the first side 8, and the second transverse barbs 12 are located near the second side 9. Adjacent transverse barbs in each row are arranged at equal intervals along the axial direction of the sleeve 35. Each transverse barb extends from the bottom 7 of the clamping chamber 6 toward the distal end of the clamping chamber 6 and is inclined toward the inward direction of the clamping chamber 6. That is, the proximal end of each transverse barb is fixed to the bottom 7, and the distal end is movable. In this embodiment, the transverse barb is an elastic piece with the distal end raised. The distal end of each transverse barb is an inclined end 13.

[0108] When the first lateral barb 11 of each abutting component abuts against the first ear 25 of the clamp 22 from behind, the second lateral barb 12 abuts against the second ear 29 of the same clamp 22 from behind. Specifically, when the inclined end 13 of the first lateral barb 11 engages a first ear 25, the inclined end 13 of the second lateral barb 12 engages a second ear 29 on the same side as the first ear 25. Thus, each abutting component can prevent the clamp 22 from moving from the current station to an adjacent proximal station in the clamping chamber 6.

[0109] When the clamp 22 moves forward along the axial direction of the sleeve 35, the clamp 22 slides into contact with the front transverse barb, pressing the transverse barb towards the bottom 7, so that the clamp 22 can smoothly pass through the transverse barb, allowing the clamp 22 to move from the current station to the adjacent far station. Specifically, when the clamp 22 moves forward along the axial direction of the sleeve 35, the first clamping arm 23 of the clamp 22 slides past the first transverse barb 11 in front of it, and at the same time, the second clamping arm 27 of the clamp 22 slides past the second transverse barb 12 in front of it, causing both the first transverse barb 11 and the second transverse barb 12 to bend towards the bottom 7, so that the clamp 22 can smoothly pass through the first transverse barb 11 and the second transverse barb 12 to enter the adjacent front station.

[0110] As described above, the transmission mechanism includes a clamping drive mechanism and a jaw drive mechanism. To continuously apply multiple clamps 22, the clamping pliers need to perform three actions: clamping action, jaw closing action (clamping action), and clamping push action. In order to perform the above three actions, the transmission mechanism also includes a clamping push drive mechanism.

[0111] The clamp feeding drive mechanism drives the clamp 22 into the jaw assembly 14 (clamp feeding action), the clamp pushing drive mechanism drives the other clamps 22 in the clamping chamber 6 to move forward one position (clamp pushing action), and the jaw driving mechanism drives the jaw assembly 14 to move. The wrench 4 drives the transmission mechanism, thereby driving the clamp feeding drive mechanism, the clamp pushing drive mechanism, and the jaw driving mechanism to move, so that the clamp feeding drive mechanism performs the clamp feeding action, the clamp pushing drive mechanism performs the clamp pushing action, and the jaw driving mechanism performs the jaw closing action (clamping action).

[0112] refer to Figure 14 The jaw drive mechanism includes a jaw drive tube 32, a sleeve 35, and a first reset member 36. The jaw drive tube 32 is housed within the housing of the operating assembly 1. The sleeve 35 is fitted over the clamping chamber 6 and also forms part of the lever assembly 5. The proximal end of the sleeve 35 connects to the jaw drive tube 32, and the distal end of the sleeve 35 engages with the jaw assembly 14. The jaw drive tube 32 can drive the sleeve 35 to move distally to drive the jaw assembly 14 to close. The first reset member 36 is a spring. The first reset member 36 is disposed within the head housing 2 of the clamping pliers and fitted over the jaw drive tube 32. The proximal end of the first reset member 36 abuts against a baffle 34 on the outer surface of the jaw drive tube 32, and the distal end abuts against the inner wall of the head housing 2. The first reset member 36 stores energy when the jaw drive mechanism advances, and releases this energy when the first reset member 36 recovers its deformation, thereby providing power for the jaw drive mechanism to reset and retract.

[0113] The jaw assembly 14 includes a first jaw arm 15 and a second jaw arm 16, respectively pivotally connected to the distal end of the clamping chamber 6. A second reset element, which is a spring, is located between the first jaw arm 15 and the second jaw arm 16. When the jaw drive tube 32 drives the sleeve 35 to move distally, the jaw assembly 14 can be at least partially received within the sleeve 35 from the distal end, causing the jaw assembly 14 to close. At this time, the second reset element between the two jaw arms is compressed, and the first reset element 36 is also compressed. After clamping is completed, during the process of the wrench moving from the closed position to the open position, under the action of the first reset element 36, the sleeve 35 moves proximally, causing the jaw assembly 14 to extend from the distal end of the sleeve 35. Simultaneously, the second reset element releases energy to open the jaw assembly 14, and the clamp 22 disengages from the jaw assembly 14 and clamps onto tissue or blood vessels.

[0114] refer to Figures 18A-18BThe shaft assembly 5 also includes a base 37, which has high rigidity. Part of the base 37 is housed within the sleeve 35, and part is housed within the head housing 2. The base 37 is installed on the outer side of the bottom 7 of the clamping chamber 6. The clamp 22, the first side 8 of the clamping chamber 6, and the second side 9 of the clamping chamber 6 are all located on the inner side of the bottom 7. "Inner side" and "outer side" refer to the two sides of the plane containing the bottom 7.

[0115] refer to Figure 14 , Figures 18A-18B , Figures 19A-19B The clamping drive mechanism includes a clamping assembly, a clamping drive tube 43, and a third reset member 45. The clamping drive tube 43 is partially located within the jaw drive tube 32 and is capable of axial movement of the sleeve 35 within the jaw drive tube 32. The proximal end of the clamping assembly is connected to the clamping drive tube 43, which drives the clamping assembly to move distally. The base 37 has a guide groove 38 that accommodates the clamping assembly and allows axial movement of its sleeve 35. The distal end of the guide groove 38 has a guide surface 39, which is an inclined surface and angled relative to the axial direction of the sleeve 35. When the base 37 is installed in the clamping chamber 6, the guide surface 39 faces distally and is inclined towards the clamping chamber 6. The bottom 7 of the clamping chamber 6 has an inlet 10 corresponding to the guide surface 39.

[0116] The third reset component 45 is a spring. (Reference) Figure 14 The inner wall of the jaw drive tube 32 is provided with a rib 33. The distal end of the third reset member 45 abuts against the rib 33 of the jaw drive tube 32, and the proximal end abuts against the distal end face of the clamping drive tube 43. The third reset member 45 is used to store energy when the clamping drive mechanism moves forward, and releases the energy when the third reset member 45 recovers its deformation, thereby providing power for the reset and retraction of the clamping drive mechanism.

[0117] refer to Figures 18A-18B , Figures 19A-19B The clamping assembly includes a clamping rod 40, an elastic rod 41, and a clamping block 42. The proximal end of the clamping rod 40 is connected to the clamping drive tube 43, the distal end of the clamping rod 40 is connected to the proximal end of the elastic rod 41, and the distal end of the elastic rod 41 is connected to the clamping block 42. The clamping rod 40 is highly rigid and not easily deformed, thus preventing it from bending during the axial movement of the sleeve 35 within the guide groove 38 and causing obstruction of the clamping assembly.

[0118] refer to Figures 18A-18B , Figures 19A-19BThe clamping drive tube 43 drives the clamping rod 40 to move distally, causing the elastic rod 41 and the clamping block 42 to also move distally. At this time, the third reset member 45 deforms. When the elastic rod 41 moves distally until the clamping block 42 abuts against the guide surface 39, the elastic rod 41 begins to bend. The clamping block 42 enters the clamping chamber 6 from the inlet 10 along the guide surface 39 between the first clamp and the second clamp, and abuts against the rear end of the first clamp to push it forward into the jaw assembly 14.

[0119] After the clamp 22 is clamped in the jaw assembly 14, the clamping block 42 at the distal end of the elastic rod 41 continues to abut against the clamp 22 from the rear end of the clamp 22 to prevent the clamp 22 from moving proximally (i.e., backward) during clamping. The jaw assembly 14 closes, causing the clamp 22 to close. Then, the jaw assembly 14 is opened to disengage the clamp 22 from the jaw assembly 14, thus completing the clamping process. After the jaw assembly 14 closes, the clamping assembly is reset by the action of the third reset member 45. Specifically, the clamping rod 40 moves proximally along the axial direction of the sleeve 35 in the guide groove 38, causing the elastic rod 41 and the clamping block 42 to retract from the inlet 10 into the guide groove 38 along the guide surface 39.

[0120] refer to Figure 14 , Figure 18B and Figure 19B The push-clamp drive mechanism includes a push-clamp seat 46. The proximal end of the push-clamp seat 46 is located inside the feed drive tube 43, and the other part of the push-clamp seat 46 extends distally and is disposed inside the sleeve 35. The base 37 is mounted on one side of the clamping chamber 6, and the push-clamp seat 46 is disposed on the opposite side of the clamping chamber 6. The push-clamp seat 46 is capable of axial movement of the sleeve 35 within the feed drive tube 43.

[0121] refer to Figures 18A-18B , Figures 19A-19BFor each of the M stations in the clamping chamber 6, the pusher seat 46 has M side cavities spaced apart, each containing a pusher block 31. Each pusher block 31 is connected to the pusher seat 46 via a spring 72. The spring 72 provides a force to the pusher block 31 to rotate outward toward the side cavity, specifically causing the distal end of the pusher block 31 to extend out of the side cavity and tilt toward the clamp 22. As the pusher seat 46 advances along the axial direction of the sleeve 35, the distal end of each pusher block 31 abuts against and pushes a clamp 22 forward, causing the clamp 22 to move forward along the axial direction of the sleeve 35. The clamp 22 smoothly passes through the first transverse barb 11 and the second transverse barb 12, thus allowing the clamp 22 to move from the current station to the adjacent distal station. Therefore, the pusher seat 46 can push other clamps 22 (clamps 22 other than the first clamp) in the clamping chamber 6 forward by one station. When the push clamp seat 46 retracts along the axial direction of the sleeve 35, the clamp 22 cannot retract due to the action of the first transverse barb 11 and the second transverse barb 12. This causes the push clamp block 31 to rotate into the side cavity under the pressure of the clamp 22, thus avoiding the clamp 22 and preventing the push clamp block 31 from retracting with the clamp 22.

[0122] The transmission mechanism also includes a switching mechanism and a coupling mechanism. The following section will use... Figure 14 Using the placement direction and angle of the clamp as a reference, the structure and principle of the switching mechanism will be explained in more detail:

[0123] refer to Figure 10-15 The switching mechanism includes a base 62, a first clutch 63, a clutch switching mechanism, and a second clutch 64. The base 62 has a first oblong hole and a second oblong hole, which are arranged opposite each other along a direction perpendicular to the plane of the paper (to...). Figure 14 (The placement angle of the clamp is for reference). The first clutch 63 is housed in the base 62, and the second clutch 64 is the far end face of the base 62.

[0124] The clamping drive tube 43 is sleeved on the outside of the push clamp seat 46. Part of the clamping drive tube 43 is located inside the jaw drive tube 32 and can move axially within the sleeve 35 inside the jaw drive tube 32. A circumferentially extending groove 44 is provided at the proximal end of the clamping drive tube 43. In the initial state, the seat body 62 is sleeved on the outside of the clamping drive tube 43, the bottom end of the first clutch member 63 is inserted into the groove 44, and the upper end of the first clutch member 63 is connected to the clutch switching mechanism.

[0125] The clutch switching mechanism includes a guide post 65 and a guide rail. The upper end of the first clutch member 63 is connected to the guide post 65. The guide rail is disposed inside the head housing 2, and the guide post 65 can move on the guide rail. Specifically, the head housing 2 of the clamping pliers includes a first head housing 90 and a second head housing. The first head housing 90 and the second head housing are symmetrically arranged along the axial direction of the sleeve 35. The guide rails are symmetrically arranged on the inner walls of the first head housing 90 and the second head housing. That is, the inner wall of the first head housing 90 is provided with a guide rail, and the inner wall of the second head housing is also provided with a guide rail.

[0126] A guide post 65 is housed in a base 62 and has a first guide end and a second guide end. The first guide end of the guide post 65 extends from a first oblong hole and rests on a guide rail on the inner wall of the first head housing 90, and can move along that guide rail. The second guide end of the guide post 65 extends from a second oblong hole and rests on a guide rail on the inner wall of the second head housing, and can move along that guide rail. Each oblong hole extends vertically, allowing the guide post 65 to move vertically. The guide rail includes a first guide surface 66 and a second guide surface 67, with the second guide surface 67 being higher than the first guide surface 66.

[0127] The wrench 4 pushes against the seat 62, causing the seat 62 to move distally. The first clutch 63 then moves forward, driving the clamping drive mechanism distally to perform the clamping action. The guide post 65 moves along the guide rail following the movement of the first clutch 63. When the guide post 65 moves on the first guide surface 66, the first clutch 63 remains engaged with the clamping drive tube 43. Since the second guide surface 67 is higher than the first guide surface 66, when the guide post 65 moves to the second guide surface 67 of the guide rail, it causes the first clutch 63 to move upward, disengaging the first clutch 63 from the groove 44 of the clamping drive tube 43 and separating it from the clamping drive tube 43.

[0128] As the wrench 4 drives the clamp feeding drive mechanism to move to the distal end, the second clutch 64 (the distal end face of the base 62) gradually approaches the proximal end face of the jaw drive tube 32. When the first clutch 63 separates from the clamp feeding drive tube 43, the second clutch 64 abuts against the proximal end face of the jaw drive tube 32 to push the jaw drive tube 32 to move, thereby driving the jaw drive mechanism to move to perform the jaw closing action.

[0129] One part of the mating mechanism is connected to the base 62, and the other part is connected to the proximal end of the push clamp seat 46, with a distance between the two parts of the mating mechanism. The mating mechanism enables the feeding drive mechanism to move forward while the push clamp drive mechanism moves backward to store energy, and the feeding action performed by the feeding drive mechanism and the pushing action performed by the push clamp drive mechanism are out of sync.

[0130] refer to Figure 10-15The mating mechanism includes an upper rack 69, an intermediate component 71, and a lower rack 70. The intermediate component 71 includes a first gear and a second gear. The upper rack 69 meshes with the first gear, and the lower rack 70 meshes with the second gear. The first gear and the second gear are coaxially arranged and can rotate synchronously. The seat 62 is connected to the upper rack 69, and the push clamp seat 46 is connected to the lower rack 70. The upper rack 69 and the lower rack 70 move in opposite directions; when the upper rack 69 moves to the distal end, the lower rack 70 moves to the proximal end. Both the upper rack 69 and the lower rack 70 are arranged along the axial direction of the sleeve 35, and the first gear and the second gear are arranged between the upper rack 69 and the lower rack 70. The push clamp drive mechanism also includes a fourth reset component 68, one end of which is connected to the housing, and the other end is connected to the proximal end of the lower rack 70. The fourth reset component 68 is a spring.

[0131] The clamping pliers also include a backstop mechanism, which can abut against the clamping drive mechanism to prevent it from retracting at the moment the first clutch 63 of the switching mechanism separates from the clamping drive mechanism. When the wrench 4 is in the first intermediate position, the user releases the wrench 4, and the wrench 4 reaches the second intermediate position. At this time, the backstop mechanism still abuts against the clamping drive mechanism to prevent it from retracting, as described in detail below.

[0132] refer to Figure 14-15 , Figure 20-21 The anti-reverse mechanism includes a guide pivot 73 and a bias spring 74. The guide pivot 73 has a pivot portion 76. The pivot portion 76 is pivotally connected to the housing via a first pivot axis, allowing the guide pivot 73 to rotate relative to the housing about the first pivot axis. The guide pivot 73 also has a force-receiving portion 77, a guiding portion 78, and an anti-reverse portion 79.

[0133] Specifically, the guide pivot 73 includes a first pivot arm 80 extending proximally from the pivot portion 76, and a second pivot arm 81 extending distally from the pivot portion 76. The guide pivot 73 also includes a third pivot arm 82 extending obliquely upward from the pivot portion 76, the third pivot arm 82 forming an obtuse angle with the first pivot arm 80. The end of the first pivot arm 80 is a force-receiving portion 77, the end of the second pivot arm 81 is a guiding portion 78, and the end of the third pivot arm 82 is a stop portion 79.

[0134] One end of the bias spring 74 abuts against the force-receiving part 77, and the other end abuts against the housing. The first rotating arm 80 and the second rotating arm 81 form a lever with the first pivot point of the pivot part 76 as the fulcrum. The bias spring 74 and the guide part 78 are located at both ends of the lever. When the bias spring 74 is in a compressed state, it applies a thrust to the force-receiving part 77, causing the guide pivot 73 to tend to rotate clockwise. That is, the anti-reverse part 79 and the guide part 78 also tend to rotate clockwise. Figure 15 (The placement angle of the clamp is for reference).

[0135] refer to Figure 22 The wrench 4 includes a wrench body, a user-operated grip 83 located at one end of the wrench body, and a pusher 84 located at the other end of the wrench body. The pusher 84 abuts against and pushes the seat 62 of the switching mechanism, enabling the switching mechanism to move to a distal end. The wrench body has a pivot end 85 pivotally connected to the housing, and the wrench 4 can rotate around the pivot end 85. The wrench 4 also has a guide channel 86. The guide channel 86 is located in the wrench body and is located between the pivot end 85 and the pusher 84.

[0136] refer to Figure 20 , Figure 24 , Figure 25 In this embodiment, the anti-reverse mechanism also includes a guide member 75, which is disposed in the guide portion 78 of the guide pivot member 73. At least a portion of the guide member 75 is housed in the guide channel 86. When the wrench 4 rotates around its pivot end 85, the guide channel 86 rotates accordingly, causing the guide member 75 to move around the first axis under the action of the bias spring 74. The guide channel 86 is a closed channel surrounded on all sides, and the movement of the guide member 75 in all directions within the guide channel 86 is restricted, preventing it from leaving the guide channel 86. Therefore, in this embodiment, the guide member 75 cannot disengage from the wrench 4.

[0137] refer to Figure 23 The guide channel 86 includes a starting point a, a stop point b, an intermediate point c, and an end point d. The distances from the starting point a to the pivot end 85 of the wrench 4 and from the end point d to the pivot end 85 of the wrench 4 are both less than the distances from the stop point b to the pivot end 85 of the wrench 4, and also less than the distances from the intermediate point c to the pivot end 85 of the wrench 4. That is, the position of the stop point b is higher than the starting point a and the end point d, and the position of the intermediate point c is also higher than the starting point a and the end point d.

[0138] The guide channel 86 includes a main channel 87 and a secondary channel 89 extending from an opening 88 of the main channel 87, the opening 88 being located between the two ends of the main channel 87. The secondary channel 89 extends from the opening 88 of the main channel 87 in a direction away from the pivot end 85 of the wrench 4, that is, the distance between the secondary channel 89 and the pivot end 85 is greater than the distance between the main channel 87 and the pivot end 85. The main channel 87 has a starting point a and an ending point d at its two ends, respectively. A stop point b and a midpoint c are located within the secondary channel 89. A bias spring 74 applies a force to the guide pivot 73, allowing the guide 75 to disengage from the main channel 87 and enter the secondary channel 89.

[0139] When the wrench 4 is in the open position, the guide 75 is at the starting point a. During the movement of the wrench 4 from the open position to the first intermediate position, the wrench 4 drives the guide 75 to rotate clockwise from the starting point a and rise into the channel 89 under the action of the bias spring 74, then moves within the channel 89 to the intermediate point c. During the movement of the wrench 4 from the first intermediate position to the second intermediate position, the wrench 4 drives the guide 75 to retract from the intermediate point c in the channel 89 to the stop point b in the channel 89. When the wrench 4 moves from the second intermediate position to the closed position, the wrench 4 drives the guide 75 to move down from the stop point b in the channel 89 to the end point d of the main channel 87. When the guide 75 enters the channel 89, the guide pivot 73 rotates upward, causing the stop portion 79 of the guide pivot 73 to move upward.

[0140] refer to Figure 23 The main channel 87 includes a blocking wall 57. The main channel 87 includes a first wall 56 extending from the starting point a to connect with the blocking wall 57, the first wall 56 and the blocking wall 57 forming a right angle or an acute angle. This simple angular design of the guide channel 86 ensures that the blocking wall 57 effectively prevents the guide member 75 from retracting from the stop point b back to the starting point a, thereby allowing the wrench 4 to stop at the second intermediate position. Thus, when the wrench 4 is in the first intermediate position, if the user releases the wrench 4, the wrench 4 reaches the second intermediate position, and the stop mechanism still abuts against the clamping drive mechanism to prevent the clamping drive mechanism from retracting.

[0141] To enable the guide member 75 to move from the stop point b to the end point d, the channel 89 also includes a guide wall 59. The main channel 87 also includes a second wall 58 extending from the end point d and connected to the guide wall 59, the second wall 58 forming an obtuse angle with the guide wall 59. This simple angular design of the guide channel ensures that the guide member 75 can move from the stop point b to the end point d.

[0142] refer to Figure 24 , Figure 25 When the user presses the wrench 4, the wrench 4 moves forward to the first intermediate position. When the guide 75 moves from the starting point a to the intermediate point c, the guide 75 enters the channel 89 through the autonomous channel 87. The guide pivot 73 rotates upward and lifts up. At this time, the first clutch 63 separates from the clamping drive tube 43, and the second clutch 64 abuts against the jaw drive tube 32. The switching mechanism can drive the jaw drive mechanism to move to the far end. At this time, the clamping pliers are in the clamping completed state. The clamping drive mechanism has delivered the clamp 22 into the jaw assembly. The anti-reverse part 79 moves up to abut against the clamping drive tube 43 to prevent it from retracting.

[0143] When the user releases the wrench 4, the wrench 4 moves in the opposite direction from the first intermediate position to the second intermediate position. The guide 75 retracts from the intermediate point c in the channel 89 to the stop point b in the channel 89, and is thus stuck at the stop point b and no longer moves. At this time, since the guide 75 is still in the channel 89, the stop part 79 remains in an upward-raised state and abuts against the feed drive tube 43 to prevent it from retracting.

[0144] The user continues to press the wrench 4, and the wrench 4 moves forward from the second intermediate position, causing the guide 75 to move from the stop point b to the end point d. The guide 75 continues to move in the channel 89, the guide pivot 73 does not move downwards, and the stop 79 remains in contact with the clamping drive tube 43 to prevent the clamping drive tube 43 from retracting. This ensures that the clamping block 42 of the clamping assembly can abut against the clamp 22 at its proximal end, preventing the clamp 22 from retracting during clamping and thus guaranteeing clamping stability. During this process, the second clutch 64 abuts against the jaw drive tube 32, and the switching mechanism drives the jaw drive mechanism to move distally to perform the jaw closing action (clamping action).

[0145] When the user continues to press the wrench 4, and the wrench 4 reaches the closed position, causing the guide 75 to move from the stop point b along the channel 89 to the end point d in the main channel 87, the stop part 79 moves to below the clamp delivery drive tube 43, and the stop part 79 separates from the clamp delivery drive tube 43. The clamp delivery drive tube 43 then retracts and resets under the action of the third reset member 45. When the guide 75 reaches the end point d, the clamping forceps are in the clamping completed state, and the clamp 22 held in the jaw assembly 14 is applied to the tissue or blood vessel. When the wrench 4 is released, the jaw drive mechanism resets under the action of the first reset member 36, the switching mechanism resets under the action of the fourth reset member 68, and the wrench 4 resets under the drive of the switching mechanism.

[0146] As described above, the wrench 4 has forward and reverse movements, and the directions of the forward and reverse movements are opposite. When the user presses the wrench 4, causing it to move and thus the clamping jaws to perform a clamping action and a jaw closing action, this is the forward movement of the wrench 4. When the user releases the wrench 4, it moves in the reverse direction. Specifically, the wrench 4 moves forward from the open position to the first intermediate position; the wrench 4 moves in the reverse direction from the first intermediate position to the second intermediate position; the wrench 4 moves forward from the second intermediate position to the closed position; and the wrench 4 moves in the reverse direction from the closed position to the open position.

[0147] During the process of the wrench 4 moving from the open position to the closed position, the movement path of the guide member 75 in the guide channel 86 is the first path. During the process of the wrench 4 moving from the closed position to the open position, the movement path of the guide member 75 in the guide channel 86 is the second path. The first movement path includes the main channel 87 and the secondary channel 89, and the second movement path includes the main channel 87 but does not include the secondary channel 89.

[0148] This embodiment of the clamp also includes a path switching component 91, a positioning mechanism, and a path driving component. The path switching component 91 has an open state and a closed state. When the path switching component 91 is in the open state, it opens the slave channel 89 to allow the guide 75 to enter or exit the slave channel 89. When the path switching component 91 is in the closed state, it blocks the slave channel 89 to prevent the guide 75 from entering the slave channel 89.

[0149] refer to Figure 10-15 , Figure 24-25 The path switching component 91 is connected to the wrench 4. The path switching component 91 is disposed between the wrench 4 and the first head housing 90. As described above, the wrench body is provided with a pivot end 85 that is pivotally connected to the housing, and the wrench 4 can rotate around the pivot end 85. The grip portion 83 of the wrench 4 is disposed on one side of the pivot end 85, and the path switching component 91 is disposed on the opposite side of the pivot end 85.

[0150] refer to Figure 26-27 The path switching component 91 includes a pivot portion 92, a first trigger portion 93, a second trigger portion 94, and an execution portion 95. The pivot portion 92 of the path switching component 91 is connected to the wrench body via a second pivot. The path switching component 91 can rotate relative to the wrench 4 about the second pivot. The first trigger portion 93 is disposed on one side of the pivot portion 92, the second trigger portion 94 is disposed on the opposite side of the pivot portion 92, and the execution portion 95 is disposed on the first trigger portion 93. The execution portion 95 is correspondingly disposed to the slave channel 89 of the guide channel 86, and the execution portion 95 is used to shield the slave channel 89. Preferably, the first trigger portion 93 and the second trigger portion 94 form an obtuse angle, and this obtuse angle faces the first head housing 90. In other embodiments, the first trigger portion 93 and the second trigger portion 94 may form an acute angle or a right angle.

[0151] When the actuator 95 is tilted toward the wrench 4, the actuator 95 can close the opening 88 of the main channel 87 to close the secondary channel 89, so that the guide 75 cannot enter the secondary channel 89 from the opening 88. At this time, the guide 75 can only move from the end point d of the main channel 87 to the starting point a of the main channel 87 along the actuator 95.

[0152] When the path switching component 91 rotates relative to the wrench 4 around the second pivot at the pivot 92, the first trigger part 93 rotates toward the inner wall of the first head housing 90 or toward the wrench 4. When the first trigger part 93 rotates toward the inner wall of the first head housing 90, the second trigger part 94 rotates toward the wrench 4.

[0153] The positioning mechanism includes a protrusion 96, a first recess 97, and a second recess 98. (Reference) Figure 27 A protrusion 96 is disposed on the pivot portion 92 of the path switching member 91. When the path switching member 91 rotates about the second pivot axis, the protrusion 96 rotates synchronously. Referring to 21A, both the first recess 97 and the second recess 98 are disposed on the wrench body. The protrusion 96 is elastic, allowing it to move from the first recess 97 to the second recess 98, and also from the second recess 98 to the first recess 97.

[0154] When the protrusion 96 is located inside the second recess 98, the second trigger part 94 tilts toward the wrench 4, the first trigger part 93 tilts toward the inner wall of the first head housing 90, and the execution part 95 provided on the first trigger part 93 also tilts toward the inner wall of the first head housing 90, so that the execution part 95 gives way to the channel 89, and at this time the path switching member 91 is in the open state.

[0155] When the protrusion 96 is located inside the first recess 97, the second trigger part 94 tilts toward the inner wall of the first head housing 90, the first trigger part 93 tilts toward the wrench 4, and the execution part 95 disposed on the first trigger part 93 also tilts toward the wrench 4, so that the execution part 95 closes the channel 89, and the path switching member 91 is in a closed state.

[0156] When no external force is applied, the protrusion 96 is operablely accommodated in the second recess 98 or the first recess 97. The protrusion 96 can be limited by the second recess 98 or the first recess 97, so that the path switching member 91 cannot rotate around the second pivot, thereby keeping the path switching member 91 always in the open or closed state.

[0157] During the movement of the wrench 4, the path switching component 91 and the path driving component move relative to each other. The path driving component can drive the path switching component 91 to switch between an open state and a closed state. Specifically, the path driving component drives the path switching component 91 to rotate relative to the wrench 4 about a second pivot, causing the protrusion 96 to move between the second recess 98 and the first recess 97. When the protrusion 96 of the path switching component 91 is operably accommodated in the second recess 98, the path switching component 91 needs to rotate about the second pivot along a first preset direction by a first angle to move the protrusion 96 into the first recess 97. When the protrusion 96 of the path switching component 91 is operably accommodated in the first recess 97, the path switching component 91 needs to rotate about the second pivot along a second preset direction by a second angle to move the protrusion 96 into the second recess 98. The first preset direction and the second preset direction are opposite directions to each other; for example, when the first preset direction is clockwise, the second preset direction is counterclockwise.

[0158] refer to Figure 27The path drive component includes a first guide rib 99 and a second guide rib 101, both of which are disposed on the inner wall of the first head housing 90. The first guide rib 99 has a first inclined surface 100, and the second guide rib 101 has a second inclined surface 102. Both the first inclined surface 100 and the second inclined surface 102 have a guiding function.

[0159] Initially, the user does not operate the wrench 4, and the wrench 4 is in the open position. The path switching element 91 is located at the second guide rib 101 and disengaged from the first guide rib 99. In response to the wrench 4 moving from the open position to the closed position, the wrench 4 can drive the path switching element 91 to move from the second guide rib 101 to the first guide rib 99. When the wrench 4 is in the closed position, the path switching element 91 is located at the first guide rib 99 and disengaged from the second guide rib 101. In response to the wrench 4 moving from the closed position to the open position, the wrench 4 can drive the path switching element 91 to move from the first guide rib 99 to the second guide rib 101. Specifically:

[0160] refer to Figure 29A Initially, when the wrench 4 is in the open position, the first trigger part 93 disengages from the first guide rib 99, the second trigger part 94 is located between the second guide rib 101 and the wrench 4, the second trigger part 94 does not abut against the second guide rib 101, the protrusion 96 is operably accommodated in the second recess 98, the second trigger part 94 is tilted toward the wrench 4, the first trigger part 93 is tilted toward the inner wall of the first head housing 90, so that the actuator 95 is tilted toward the inner wall of the first head housing 90, the actuator 95 clears the passage 89, and the path switching member 91 is in the open state.

[0161] refer to Figure 29B Before the wrench 4 moves from the open position to the closed position, the wrench 4 drives the path switching component 91 from the second guide rib 101 to the first guide rib 99. When the first trigger part 93 moves to the first inclined surface 100 of the first guide rib 99, the first trigger part 93 continues to move along the first inclined surface 100. The first inclined surface 100 applies force to the first trigger part 93, causing the path switching component 91 to start rotating around the second axis in the first preset direction. Since it has not rotated by a sufficient angle, that is, it has not rotated by the first angle, the protrusion 96 is still operablely accommodated in the second recess 98. The second recess 98 limits the protrusion 96, and the path switching component 91 always remains in the open state. Before the wrench 4 moves forward from the open position to the closed position, the guide component 75 moves within the channel 89.

[0162] refer to Figure 30AWhen the wrench 4 reaches the closed position, the first trigger part 93 of the path switching component 91 moves along the first inclined surface 100 to between the first guide rib 99 and the wrench 4. The path switching component 91 rotates around the second pivot axis along the first preset direction by a first angle. The protrusion 96 moves from the second recess 98 into the first recess 97. The path switching component 91 switches to the closed state.

[0163] refer to Figure 30B During the process of the wrench 4 moving from the closed position to the open position and before reaching the open position, the path switching component 91 moves from the first guide rib 99 to the second guide rib 101 under the action of the wrench 4. When the second trigger part 94 moves to the second inclined surface 102 of the second guide rib 101, the second trigger part 94 continues to move along the second inclined surface 102. The second inclined surface 102 applies force to the second trigger part 94, causing the path switching component 91 to start rotating around the second axis in the second preset direction. Since it does not rotate by a sufficient angle, that is, it does not rotate by the second angle, the protrusion 96 is still operably accommodated in the first recess 97. The first recess 97 limits the protrusion 96, and the path switching component 91 always remains in the closed state. During the process of the wrench 4 moving from the closed position to the open position and before reaching the open position, the guide 75 cannot move within the channel 89.

[0164] refer to Figure 29A When the wrench 4 moves in the opposite direction from the closed position to the open position and reaches the open position, the second trigger part 94 of the path switching member 91 moves along the second inclined surface 102 to the space between the second guide rib 101 and the wrench 4, so that the path switching member 91 rotates around the second axis in the second preset direction by a second angle, and the protrusion 96 moves from the first recess 97 to the second recess 98, and the path switching member 91 switches to the open state.

[0165] In summary, in response to the wrench 4 moving from the open position to the closed position, the guide member 75 moves from the starting point a of the autonomous channel 87 to the midpoint c of the secondary channel 89, then retracts to the stop point b of the secondary channel 89, and then moves to the end point d of the main channel 87. In response to the wrench 4 moving from the closed position to the open position, the end point d of the guide member 75 moves directly along the actuator 95 of the path switching member 91 to the starting point a of the main channel 87 without passing through the secondary channel 89. The process of the wrench 4 moving from the closed position to the open position does not require any stopping, ensuring the smooth reset of the wrench 4 and the stop mechanism.

[0166] The following details the working process of the clamping pliers' transmission mechanism in performing the clamping, clamping, and pushing actions:

[0167] When the wrench 4 is in the open position, the user presses the wrench 4, causing it to move from the open position toward the first intermediate position. The wrench 4 pushes against the seat 62 of the switching mechanism, causing the switching mechanism to move to the distal end. The guide post 65 moves on the first guide surface 66, and the first clutch 63 moves forward with the switching mechanism, driving the clamping drive mechanism to move to the distal end to perform the clamping action. At the same time, the upper rack 69 moves to the distal end. During the movement of the upper rack 69 to the distal end, the upper rack 69 drives the lower rack 70 to retract through the intermediate member 71. Since the lower rack 70 is connected to the push clamp seat 46, it also drives the push clamp seat 46 to retract, causing the fourth reset member 68 to store energy.

[0168] When the wrench 4 reaches the first intermediate position, the guide post 65 of the switching mechanism moves to the second guide surface 67 of the guide rail, the first clutch 63 separates from the clamping drive tube 43, the forward stroke of the clamping drive mechanism ends (clamping action completed), and the clamp 22 enters the jaw assembly 14. At the same time, the second clutch 64 abuts against the proximal end face of the jaw drive tube 32 to push the jaw drive tube 32 to move. At this time, under the action of the anti-reverse mechanism, the pusher block 31 of the clamping drive mechanism continues to abut against the clamp 22 from the rear end of the clamp 22, keeping the clamp 22 in the jaw assembly 14.

[0169] The wrench 4 moves only slightly from the first intermediate position to the second intermediate position, and its impact on the movement of the transmission mechanism, guide pivot 73, anti-reverse mechanism, and path switching component 91 is small and negligible.

[0170] When the wrench 4 is in the second intermediate position, pressing the wrench 4 causes it to move from the second intermediate position toward the closed position. The anti-reverse mechanism gradually disengages from the clamping drive tube 43. Under the action of the wrench 4, the switching mechanism continues to push the jaw drive mechanism and the upper rack 69 forward. At the same time, the upper rack 69 continues to drive the lower rack 70 backward through the intermediate member 71. Since the lower rack 70 is connected to the push clamp seat 46, the push clamp seat 46 continues to backward. When the push clamp seat 46 backward, the fourth reset member 68 continues to store energy. The jaw drive tube 32 drives the sleeve 35 forward to close the jaw assembly 14. When the wrench 4 reaches the closed position, the jaw assembly 14 closes (clamping action completed), the fourth reset member 68 finishes storing energy, the anti-reverse mechanism completely disengages from the clamping drive tube 43, and the clamping drive tube 43 resets under the action of the third reset member 45. Release the wrench 4, and the jaw drive mechanism is reset under the action of the first reset member 36. The push clamp seat 46 moves forward under the action of the fourth reset member 68 to move the other clamps 22 in the clamping chamber 6 forward by one station (the push clamping action is completed).

[0171] In summary, in this embodiment of the limiting mechanism, when the stop portion enters the second limiting portion 49 of the guide unit 54, the stop portion abuts against the second limiting portion 49, causing the abutting member 18 to stop moving. At this time, the abutting member 18 can no longer continue to move along the first direction and must move along the second direction until the stop portion enters the first limiting portion 48 of the next guide unit 54 before the abutting member 18 can move along the first direction again. Thus, during the movement of the abutting member 18, when the stop portion enters each second limiting portion 49, the abutting member 18 will be forcibly stopped from moving along the first direction. Therefore, for surgical instruments using the limiting mechanism of this embodiment, the limiting mechanism can provide at least one forced stop position during their movement, making the movement of surgical instruments using the limiting mechanism of this embodiment easier to control and facilitating the user's use of the surgical instruments.

[0172] In this embodiment of the surgical instrument, when the forward movement of the wrench 4 causes the stop part to enter the second limit part 49 of one of the guide units 54 from the first limit part 48 of the guide unit 54, the wrench 4 completes a forward stroke and reaches the corresponding position. At this time, the wrench 4 is forcibly stopped. The user must release the wrench 4 and press it again to allow the wrench 4 to continue the next forward stroke. This allows the user to quickly and accurately press the wrench 4 to the required corresponding position.

[0173] In this embodiment, the clamping forceps, due to the setting of a limiting mechanism, when the wrench 4 completes its first forward movement and reaches the first intermediate position (the clamping forceps are in the clamping completion state), the stop part abuts against one of the second limiting parts 49 of the abutment member 18, preventing the wrench 4 from continuing to move. It is necessary to release the wrench 4 to return it to the second intermediate position, and then press it again to allow the wrench 4 to perform the second forward movement to reach the closed position. This allows the user to quickly and accurately press the wrench 4 to the first intermediate position, avoiding the wrench 4 being directly pressed to the closed position, which would cause the clamp 22 to close before being aligned with the target tissue or blood vessel. This allows the user to adjust the angle of the jaw assembly 14 when the wrench reaches the first or second intermediate position so that the clamp 22 is aligned with the target tissue or blood vessel, thereby accurately applying the clamp 22 to the target tissue or blood vessel, improving the operation convenience and reliability of the clamping forceps.

[0174] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0175] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A surgical instrument, characterized in that, The system includes a handle assembly and a limiting mechanism. The handle assembly includes a handle housing and a wrench movably connected to the handle housing. The limiting mechanism includes: A stop structure is provided in the handle housing, and the stop structure has a stop portion; The abutting member has multiple guiding units, each guiding unit including a first limiting part, a second limiting part and a first guide groove communicating between the first limiting part and the second limiting part; the second limiting part of each guiding unit is connected to the first limiting part of the adjacent guiding unit through the second guide groove; When the stop portion is located in the first limiting portion of one of the guide units, in response to applying force to the wrench, the wrench moves forward and drives the abutment to move linearly in a first direction and rotate about its own axis, such that the stop portion enters the second limiting portion of the guide unit from the first limiting portion of one of the guide units via the first guide groove of the guide unit and abuts against the second limiting portion, so that the abutment stops moving in the first direction, thereby stopping the wrench from moving forward and stopping at the current position; When the stop portion is located in the second limiting portion of one of the guide units, in response to the removal of force applied to the wrench, the wrench moves in the opposite direction, and the abutment moves in a second direction opposite to the first direction, such that the stop portion enters from the second limiting portion of one of the guide units into the first limiting portion of the adjacent guide unit via the second guide groove.

2. The surgical instrument according to claim 1, characterized in that, The limiting mechanism further includes an elastic element, which is compressed and stores energy when the abutment moves in the first direction to provide energy for the movement of the abutment in the second direction.

3. The surgical instrument according to claim 1, characterized in that, Each of the first guide grooves extends obliquely along the circumferential direction of the abutment, such that when the stop portion is located in the first limiting portion of one of the guide units, the abutment moves linearly in the first direction in response to the forward movement of the wrench while rotating about its own axis.

4. The surgical instrument according to claim 1, characterized in that, Each of the second guide grooves extends axially along the abutment.

5. The surgical instrument according to claim 1, characterized in that, A first stop wall is provided between the first guide groove and the first limiting part; in response to the movement of the abutting member along the first direction, the stop part moves from the first limiting part to the first guide groove along the first stop wall.

6. The surgical instrument according to claim 1, characterized in that, The stop structure includes a receiving cylinder and a pin. The abutting member is movably connected to the receiving cylinder, and the pin is disposed in the receiving cylinder, forming the stop portion.

7. The surgical instrument according to claim 6, characterized in that, An elastic element is provided between the pin and the receiving cylinder, and the elastic element biases the pin toward the abutment.

8. The surgical instrument according to claim 1, characterized in that, The wrench has an open position, a first intermediate position, a second intermediate position, and a closed position; When the wrench is in the open position, the stop portion is located in the first limiting portion of one of the guide units. In response to applying force to the wrench, the wrench moves forward and drives the abutment to move linearly along the first direction and rotate around its own axis until the stop portion abuts against the second limiting portion of the guide unit in which it is located, at which point the wrench reaches the first intermediate position. When the wrench is in the first intermediate position, in response to the removal of force applied to the wrench, the wrench moves in the opposite direction to the second intermediate position, and the abutment moves in a second direction opposite to the first direction, so that the stop portion enters the first limiting portion of the adjacent guide unit; When the wrench is in the second intermediate position, in response to applying force to the wrench, the wrench moves forward and drives the abutment to move linearly along the first direction and rotate around its own axis until the stop portion enters the second limiting portion of the guide unit in which it is located, at which point the wrench reaches the closed position.

9. The surgical instrument according to claim 8, characterized in that, When the wrench is in the closed position, in response to the removal of force applied to the wrench, the wrench moves in the opposite direction to the open position, and the stop portion moves from the second limiting portion of the guide unit in which it is located into the first limiting portion of the adjacent guide unit.

10. The surgical instrument according to claim 8, characterized in that, The surgical instrument further includes a jaw assembly, a clamping magazine, and a clamp delivery drive mechanism, the clamping magazine having a clamp; in response to the wrench moving from the open position to the first intermediate position, the clamp delivery drive mechanism drives the clamp to move from the clamping magazine into the jaw assembly.

11. The surgical instrument according to claim 10, characterized in that, The surgical instrument further includes a jaw drive mechanism; in response to the wrench moving from the second intermediate position to the closed position, the jaw drive mechanism drives the jaw assembly to close so that the clamps in the jaw assembly are closed.

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