clip applier

Abstract

The application relates to a clip applier, which comprises a jaw assembly, a clip bin, a handle assembly, a clip feeding driving mechanism, a clip pushing driving mechanism, a jaw driving mechanism; the clip bin comprises a first clip, a second clip and an Nth clip arranged in respective workstations in sequence from a distal end to a proximal end; first stop portions are arranged on the inner wall of the clip bin on the front side of the second clip to the Nth clip; the clip pushing driving mechanism is used for driving the second clip to the Nth clip to move to a previous workstation and stop on the rear side of the first stop portion corresponding to the previous workstation after the second clip to the Nth clip pass the first stop portion corresponding to the current workstation. When the clips in the clip bin are pushed forward, the first stop portion can restrict the forward moving range of the clips, plays a stop role, prevents the distance of the forward movement of the clips from being too large, and then avoids the disorder of the clips in the clip bin.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a clamping forceps. Background Technology

[0002] In human surgical procedures, such as abdominal surgery, clamps are often used to apply clips to tissues or blood vessels to stop bleeding. Multi-shot clamps can apply multiple clips consecutively, making them more convenient to use and increasingly popular in recent years.

[0003] A type of repeating clamp in related technology includes a jaw assembly, a wrench, a clamping magazine, a clamp feeding drive mechanism, a jaw driving mechanism, and a clamp pushing drive mechanism. The clamping magazine contains clamps. The wrench has an open position, a neutral position, and a closed position. A user presses the wrench, causing it to move from the open position to the neutral position, and then to the closed position.

[0004] To apply multiple clamps continuously, the clamping forceps must perform three actions: clamp delivery, jaw closure (clamping action), and clamp pushing. When the wrench moves from the open position to the intermediate position, the clamp delivery drive mechanism delivers the foremost clamp in the clamp chamber to the ready position within the jaw assembly (clamp delivery action). At this point, the clamping forceps are in the clamp delivery completed state, and the user can adjust the angle of the jaw assembly to align the clamp with the target tissue or blood vessel. The user then continues to press the wrench, moving it from the intermediate position to the closed position, closing the jaw assembly (clamping action), thus applying the clamps to the target tissue or blood vessel. During the movement of the wrench from the open position to the intermediate position, multiple clamp pushing blocks of the clamp pushing drive mechanism move proximally. When the wrench is in the intermediate position, the pushing blocks move to the rear of the adjacent clamp proximally; or, when the wrench is in the intermediate position, the pushing blocks move to the radial side of the adjacent clamp in the clamp chamber. When the wrench moves from the intermediate position to the closed position, the pushing blocks move again to the rear of the adjacent clamp proximally. When the wrench is released, it moves from the closed position to the open position, and the push-clamp drive mechanism moves the other clamps in the clamping chamber forward one station (pushing clamp action). However, during the pushing clamp action, when the clamp moves forward, that is, moves one station to the far side, it may rush forward a large distance due to inertia and may not stop exactly at the previous station. This will cause the clamps in the clamping chamber to become disordered, affecting the subsequent use of the clamping clamp.

[0005] Based on the above, it is necessary to further improve the clamping clamp in the relevant technology. Summary of the Invention

[0006] Therefore, it is necessary to provide a clamping clamp that solves the technical problem of clamp disorder caused by the lack of effective limit when the clamp moves forward.

[0007] This application proposes the following technical solution: a clamping pliers, comprising a jaw assembly, a clamping chamber, a handle assembly, a clamp feeding drive mechanism, a clamp pushing drive mechanism, and a jaw driving mechanism; the clamping chamber includes a distal end and a proximal end arranged axially, the distal end being connected to the jaw assembly, the clamping chamber containing N clamps, N being greater than or equal to 2, the N clamps including a first clamp, a second clamp, up to an Nth clamp arranged sequentially at their respective workstations from the distal end to the proximal end, the inner wall of the clamping chamber having a first stop portion corresponding to the front side of the second clamp to the Nth clamp; the handle assembly includes a handle housing and a wrench movably connected to the handle housing, the wrench having an open position, a middle position, and a closed position; the clamp pushing drive mechanism includes multiple clamp pushing blocks respectively used to abut against and push the second clamp to the Nth clamp forward, in the state where the wrench is in the open position, the multiple clamp pushing blocks... The clamping blocks are respectively located in front of the second to the Nth clamps; in response to the wrench moving from the open position to the intermediate position, the clamping drive mechanism drives the first clamp to move from the clamping chamber to the jaw assembly, and the plurality of the push clamping blocks move proximally; in response to the wrench moving from the 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, and when the wrench is in the closed position, each of the push clamping blocks is respectively located behind the second to the Nth clamps; in response to the wrench moving from the closed position to the open position, the plurality of push clamping blocks move distally, so that the second to the Nth clamps pass the first stop corresponding to the current station and move distally to the previous station, and stop behind the first stop corresponding to the previous station.

[0008] The clamp of this application, when the clamp in the clamp chamber is pushed forward, the first stop part can restrict the forward movement range of the clamp, play a stopping role, thereby preventing the clamp from moving forward too far, and thus avoiding the clamp in the clamp chamber from becoming disordered.

[0009] In some embodiments, in response to the wrench moving from the open position to the intermediate position, a plurality of push clamp blocks are respectively moved rearward to one side of the second to Nth clamps in the radial direction of the clamping chamber, and at least a portion of the push clamp blocks overlap with the clamps; in response to the wrench moving from the intermediate position to the closed position, a plurality of push clamp blocks are respectively moved proximally to the rear side of the second to Nth clamps.

[0010] In some embodiments, when the wrench is in the middle position, the axial length of the overlapping area between the push clamp block and the corresponding clamp is S1, and the distance between the first stop and the corresponding clamp is S2, wherein S2 is less than or equal to S1.

[0011] In some embodiments, the first stop is a protrusion, a pit, or a friction area provided on the inner wall of the clamping chamber.

[0012] In some embodiments, a second stop is provided between the clamp and its corresponding first stop.

[0013] In some embodiments, the first stop is a protrusion, a pit, or a friction area disposed on the inner wall of the clamping chamber, and the second stop is a protrusion, a pit, or a friction area disposed on the inner wall of the clamping chamber.

[0014] In some embodiments, the push-clamp drive mechanism further includes a push-clamp seat, to which the push-clamp block is rotatably connected; in response to the wrench moving from the open position to the intermediate position, the push-clamp seat moves proximally, causing the push-clamp block to move proximally and abut against the corresponding clamp, thereby deflecting the push-clamp block to one side of the clamp in the radial direction of the clamping chamber and overlapping it; in response to the wrench moving from the intermediate position to the closed position, the push-clamp seat continues to move proximally, causing the push-clamp block to continue to move proximally to the rear side of the corresponding clamp.

[0015] In some embodiments, the push-clamp drive mechanism further includes a fourth reset member. In response to the wrench moving from the open position to the closed position, the push-clamp seat moves proximally, causing the fourth reset member to store energy and release the wrench. The fourth reset member applies a biasing force, causing the push-clamp seat to move distally to drive the second clamp until the Nth clamp moves forward one position after passing the corresponding first stop. The resistance of the first stop to the clamp is less than the biasing force applied by the fourth reset member to the push-clamp seat.

[0016] In some embodiments, the clamping pliers include a mating mechanism comprising an upper rack, a gear, and a lower rack; the upper rack drives the lower rack via the gear; a push clamp is connected to the distal end of the lower rack, one end of a fourth reset member is connected to the proximal end of the lower rack, and the other end of the fourth reset member is connected to the handle housing; in response to the wrench movement, the upper rack moves, causing the lower rack to drive the push clamp to move in the opposite direction to the movement direction of the upper rack.

[0017] In some embodiments, the clamp feeding drive mechanism includes a clamp feeding assembly and a clamp feeding drive tube connected together. In response to the wrench moving from the open position to the intermediate position, the clamp feeding drive tube moves distally to drive the clamp feeding assembly to move distally, so that the drive clamp feeding assembly pushes the clamp in the clamping chamber into the jaw assembly.

[0018] In some embodiments, the feed drive tube is drivably connected to the upper rack, and the upper rack moves in the same direction in response to movement of the feed drive tube.

[0019] In some embodiments, the jaw drive mechanism includes a sleeve that moves distally along the axial direction to close the jaw assembly.

[0020] In some embodiments, the intermediate position includes a first intermediate position and a second intermediate position; in response to the wrench moving from the open position to the first intermediate position, the clamping drive mechanism drives the clamp to move from the clamping chamber to the jaw assembly; 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 clamp in the jaw assembly is closed; the clamping pliers further includes a limiting mechanism configured to: limit the wrench to the first intermediate position during the process of the wrench moving forward from the open position to the closed position under the action of an external force, and to allow the wrench to move in the opposite direction from the first intermediate position to the second intermediate position after the external force is removed.

[0021] In some embodiments, in response to the wrench moving from the open position to the first intermediate position, the plurality of push clamp blocks move proximally to one side of the second to Nth clamps in the radial direction of the clamping chamber; in response to the wrench moving from the second intermediate position to the closed position, the plurality of push clamp blocks move proximally to the rear side of the second to Nth clamps.

[0022] In some embodiments, the limiting mechanism includes: a stop unit disposed on the handle housing, the stop unit having a stop portion; and an abutment unit movably connected to the stop unit, the abutment unit having a limiting portion and a clearance groove; when the wrench is in the open position, in response to applying force to the wrench, the wrench moves forward and drives the abutment unit to move until its limiting portion abuts against the stop portion, causing the wrench to stop at the first intermediate position; when the wrench is in the first... When the wrench is in the intermediate position, in response to the removal of force applied to the wrench, the wrench moves in the reverse direction to the second intermediate position, and the abutting unit moves until its limiting part disengages from the stop part and its clearance groove aligns with the stop part; when the wrench is in the second intermediate position, in response to the application of force to the wrench, the wrench moves forward and drives the abutting unit to move until the wrench reaches the closed position, so that the stop part moves relative to the clearance groove and thus causes the stop part to enter the clearance groove of the abutting unit. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the clamping forceps provided in the embodiments of this application.

[0024] Figure 2A-2B This is a schematic diagram of the clamping compartment provided in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram of the clip provided in the embodiment of this application.

[0026] Figure 4 This is a cross-sectional view of the clamp provided in an embodiment of this application, wherein the jaw assembly is in the open state.

[0027] Figure 5A This application provides a partial area of ​​the clamping forceps in its embodiments. Figure 5B A cross-sectional structural diagram from the MM perspective, in which the clamping component is not in contact with the clamp.

[0028] Figure 5B This application provides a partial area of ​​the clamping forceps in its embodiments. Figure 5A A cross-sectional structural diagram from an LL perspective, showing that the clamping assembly is not in contact with the clamp.

[0029] Figure 6A This application provides a partial area of ​​the clamping forceps in its embodiments. Figure 6B A cross-sectional structural diagram from the MM perspective, in which the clamping assembly abuts against the clamp and pushes the clamp into the jaw assembly.

[0030] Figure 6B This application provides a partial area of ​​the clamping forceps in its embodiments. Figure 6A A cross-sectional structural diagram from an LL perspective, showing the clamping assembly abutting against the clamp and pushing the clamp into the jaw assembly.

[0031] Figure 6C This application provides a partial area of ​​the clamping forceps in its embodiments. Figure 6D A cross-sectional structural diagram from the MM perspective, showing the jaw assembly closed.

[0032] Figure 6D This application provides a partial area of ​​the clamping forceps in its embodiments. Figure 6C A schematic diagram of the cross-sectional structure from an LL perspective, showing the jaw assembly closed.

[0033] Figure 7 This is a schematic diagram of the limiting mechanism provided in the embodiments of this application.

[0034] Figure 8-9 This is a schematic diagram of the structure of the rotating component provided in the embodiment of this application.

[0035] Figure 10-11These are schematic diagrams of the pusher member at different angles provided in the embodiments of this application.

[0036] Figure 12-13 This is a schematic diagram of the structure of the first sleeve at different angles provided in the embodiments of this application.

[0037] Figure 14-15 This is a schematic diagram of the structure of the second sleeve at different angles provided in the embodiments of this application.

[0038] Figure 16 This is a schematic diagram of the clamp provided in the embodiment of this application, wherein the wrench is in the open position and part of the clamp housing has been removed to demonstrate the cooperation between the limiting structure and the wrench.

[0039] Figure 17 This is a schematic diagram of the clamping pliers provided in the embodiments of this application, wherein the wrench is located in the first middle position, and part of the clamping pliers housing has been removed.

[0040] Figure 18 This is a schematic diagram of the clamp provided in the embodiment of this application, wherein the wrench is in the second middle position and part of the clamp housing has been removed.

[0041] Figure 19 This is a schematic diagram of the clamp provided in the embodiment of this application, wherein the wrench is in the closed position and part of the clamp housing has been removed.

[0042] Figure 20 This is a schematic diagram of the limiting mechanism when the wrench is in the open position according to an embodiment of this application, wherein the first sleeve and the second sleeve of the limiting mechanism have been removed.

[0043] Figure 21 This is a schematic diagram of the limiting mechanism provided in this application embodiment when the wrench is in the first intermediate position, wherein the first sleeve and the second sleeve of the limiting mechanism have been removed.

[0044] Figure 22 This is a schematic diagram of the limiting mechanism provided in the embodiment of this application when the wrench is in the second intermediate position, wherein the first sleeve and the second sleeve of the limiting mechanism have been removed.

[0045] Figure 23 This is a schematic diagram of the limiting mechanism when the wrench is in the closed position according to an embodiment of this application, wherein the first sleeve and the second sleeve of the limiting mechanism have been removed.

[0046] Figure 24 This is a cross-sectional view of the clamp provided in an embodiment of this application, wherein the jaw assembly is in a closed state.

[0047] Figure 25This is a cross-sectional schematic diagram of the clamping chamber when the wrench is in the open position, as provided in this embodiment of the application.

[0048] Figure 26 yes Figure 25 Enlarged view of section A.

[0049] Figure 27 This is a partial cross-sectional schematic diagram of the clamping chamber when the wrench is in the first intermediate position according to the embodiment of this application, showing the relative positions of the push clamping block, the first stop part and the second stop part.

[0050] Figure 28 This is a partial cross-sectional schematic diagram of the clamping chamber when the wrench is in the open position according to an embodiment of this application, illustrating the relative positions of the push clamping block, the first stop, and the second stop.

[0051] Figure 29 for Figure 4 A schematic diagram of the switching mechanism.

[0052] Figure 30 for Figure 4 A schematic diagram of the connection mechanism.

[0053] Figure 31 This is a schematic diagram of the structure of the guide pivot provided in a specific embodiment of the present invention.

[0054] Figure 32 This is a schematic diagram of the guide pivot component provided in a specific embodiment of the present invention from another angle.

[0055] Figure 33 This is a schematic diagram of the structure of the wrench provided in a specific embodiment of the present invention.

[0056] Figure 34 This is a schematic diagram of the guiding channel provided in a specific embodiment of the present invention.

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

[0058] 1-Handle assembly; 2-Head housing; 3-Handle housing; 4-Wrench; 5-Shaft assembly; 6-Clamping chamber; 7-Bottom;

[0059] 8-First side; 9-Second side; 10-Inlet; 11-First transverse barb; 12-Second transverse barb; 13-Inclined end; 14-Jaw assembly; 15-First jaw arm; 16-Second jaw arm; 18-Receiving cavity; 22-Clamp; 23-First clamp arm;

[0060] 24-Stop unit; 25-First ear; 26-Connecting part; 27-Second clamping arm; 28-Abutting unit; 29-Second ear;

[0061] 30-Clamping part; 31-Push clamping block; 32-Jaw drive tube; 33-Rib; 34-Baffle; 35-Sleeve; 36-First reset component;

[0062] 37-Base; 38-Guide groove; 39-Guide surface; 40-Feeding rod; 41-Elastic rod; 42-Feeding block; 43-Feeding drive tube;

[0063] 44-Groove; 45-Third reset component; 46-Push clamp seat; 62-Seat body; 63-First clutch component; 64-Second clutch component; 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-Guide wall; 84-Blocking wall; 85-Pivot end; 86-Guide channel; 87-Main channel; 88-Opening part; 89-Passive channel; 19-First sleeve;

[0064] 20-Boss; 21-Guide slope; 47-Clamping block; 48-Second sleeve; 49-Stop part; 50-Clamping part; 51-Clamping groove;

[0065] 52-Pushing member; 53-Force-bearing end; 55-Guide end; 56-Slide groove; 57-Guide unit; 58-First guide part; 59-First wall part; 60-Second wall part; 61-Second guide part; 103-Third wall part; 104-Fourth wall part; 126-Second receiving groove; 105-Rotating member; 106-First end; 107-Limiting groove; 108-Locking groove; 109-Second end; 110-Limiting part; 111-Allowing groove; 125-Sliding unit; 112-First sliding part; 113-First side wall part; 114-Second side wall part; 115-First sliding slope; 116-Second sliding part; 117-Third side wall part; 118-Fourth side wall part; 119-Pivot; 120-Elastic member; 601-First stop part; 602-Second stop part. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0067] 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.

[0068] In this application, unless otherwise expressly 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 application 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 excluding cases, but not other possible cases.

[0069] The term "axial" as used in this article refers to the length direction of the sleeve 35.

[0070] This application aims to provide a solution to avoid clamp disorder within the clamping chamber due to the lack of effective limiting when the clamp moves forward. It can be applied to clamps with only one intermediate position on the wrench, and also to clamps with two intermediate positions on the wrench, including a first intermediate position and a second intermediate position. The technical concept of this application is described in detail below with reference to the accompanying drawings.

[0071] The following embodiments exemplify how the wrench of the clamping pliers of this application implements the technical concept of this application when it has only one intermediate position and two intermediate positions. Furthermore, exemplarily shown are how having a first intermediate position and a second intermediate position can be achieved. Specifically, the clamping pliers achieve the wrench having a first intermediate position and a second intermediate position by setting a limiting mechanism. However, the implementation of the wrench having a first intermediate position and a second intermediate position is not limited to the specific structure of the limiting mechanism exemplified in this application; that is, the specific configuration of the limiting mechanism does not affect the implementation of the technical concept of the solution to clamp disorder of this application.

[0072] Furthermore, in the examples provided in this application, the operation of the limiting mechanism is not related to the specific structure of the clamping drive mechanism of the clamping pliers. The clamping drive mechanism used in the clamping pliers only needs to be able to move under the drive of the wrench 4 to drive the clamp 22 of the clamping chamber 6 to move into the jaw assembly 14.

[0073] The operation of the limiting mechanism in this application is not related to the specific structure of the jaw drive mechanism of the clamp in this application. The jaw drive mechanism used in the clamp only needs to be able to move under the drive of the wrench to drive the jaw assembly 14 to close.

[0074] The descriptions of the specific structures of the clamping drive mechanism and the jaw drive mechanism in the following embodiments are merely exemplary and intended to explain this application, and should not be construed as limiting this application.

[0075] Please refer to Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the clamping forceps provided in the embodiments of this application. Figure 2A-2B This is a schematic diagram of the clamping compartment provided in an embodiment of this application. The clamping compartment 6 contains a plurality of clamps 22. Figure 3 This is a schematic diagram of the clip provided in an embodiment of this application. Figure 4 This is a cross-sectional view of the clamp provided in an embodiment of this application, wherein the jaw assembly is in the open state.

[0076] refer to Figure 1 This embodiment 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, and a jaw assembly 14 disposed at the distal end of the lever assembly 5.

[0077] 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 2 and a handle housing 3 extending from the lower side of the head housing 2, 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.

[0078] In this embodiment, the wrench 4 has forward and reverse movements, and the directions of the forward and reverse movements are opposite. (Reference) Figure 1 Wrench 4 has an open position (e.g.) Figure 1 The position of wrench 4 shown), the middle position (as shown) Figure 18 The position of wrench 4 shown) and the closed position (as shown) Figure 19 (The position of the wrench 4 is shown). Under the action of external force, after the wrench 4 moves forward from the open position, the free end of the wrench 4 approaches the handle housing 3 and stays in the middle position. If the wrench 4 is pressed further, the wrench 4 moves forward from the middle position to the closed position. When the wrench 4 is in the closed position, when the wrench 4 is released, the wrench 4 moves backward from the closed position to the open position.

[0079] Please refer to Figure 2A-2BThe clamp 6 is located on the shaft assembly 5. The proximal end of the clamp 6 is connected to the main body of the handle assembly 1, and the distal end of the clamp 6 is connected to the jaw assembly 14. Before clamping, the clamp 22 is placed in the clamp 6. (Reference) Figure 2A 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 other clamps. 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 Nth clamps are arranged sequentially at the second to Nth workstations. M ≥ 2, M ≥ N.

[0080] Please refer to Figure 3 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.

[0081] The size of the engaging portion 30 is larger than the distance between the two first ears 25, and the two first ears 25 have a certain elasticity and can deform. Thus, driven by external force, the first clamping arm 23 and the second clamping arm 27 approach each other, causing the engaging portion 30 to move between the two first ears 25. Under the action of the engaging portion 30, the two first ears 25 deform and engage the engaging portion 30 between the two first ears 25, so that the first clamping arm 23 and the second clamping arm 27 are fully clamped, thereby effectively clamping and stopping the bleeding of the blood vessels or tissues placed between the first clamping arm 23 and the second clamping arm 27.

[0082] refer to Figure 2A-2B The clamping chamber 6 includes a bottom 7 extending axially and opposing first and second side portions 8 and 9. When the clamp 22 is installed within the clamping chamber 6, it is compressed due to the size and internal space of the 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 locked together.

[0083] 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 2B 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. 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.

[0084] 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.

[0085] As the clamp 22 moves forward axially, it slides into contact with the front transverse barb, pressing the barb towards the bottom 7. This allows the clamp 22 to pass smoothly through the barb, enabling it to move from the current workstation to the adjacent, far-end workstation. Specifically, as the clamp 22 moves forward axially, its first clamping arm 23 slides past the first transverse barb 11 in front of it, while its second clamping arm 27 slides past the second transverse barb 12 in front of it. This causes both the first and second transverse barbs 11 to bend towards the bottom 7, allowing the clamp 22 to pass smoothly through both barbs and enter the adjacent, front-end workstation.

[0086] In order to apply multiple clamps 22 continuously, the clamping pliers need to perform three actions: the clamping action performed by the clamping drive mechanism, the jaw closing action (clamping action) performed by the jaw drive mechanism, and the clamping action performed by the clamp pushing drive mechanism.

[0087] The following example illustrates the possible implementations of the clamp feeding drive mechanism, the jaw drive mechanism, and the clamp pushing drive mechanism, thereby better demonstrating how the technical concept of the clamp disorder solution of this application is specifically applied.

[0088] Reference Figure 1 and Figure 4 The transmission mechanism includes a clamp feeding drive mechanism, a jaw drive mechanism, and a clamp pushing drive mechanism. In response to the wrench 4 moving from the open position to the intermediate position, the clamp feeding drive mechanism drives the first clamp from the clamping chamber 6 into the jaw assembly 14. In response to the wrench moving from the intermediate position to the closed position, the jaw drive mechanism drives the jaw assembly to close, causing the clamp 22 in the jaw assembly to close. When the wrench 4 is in the closed position, each clamp pushing block is located behind the second to Nth clamps. In response to the wrench 4 moving from the closed position to the open position, multiple clamp pushing blocks 31 move forward to drive the second to Nth clamps forward respectively.

[0089] 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 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).

[0090] refer to Figure 4 The jaw drive mechanism includes a jaw drive tube 32 and a sleeve 35. The jaw drive tube 32 is housed within the housing of the handle 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 is connected to the jaw drive tube 32, and the distal end of the sleeve 35 engages with the jaw assembly 14. In response to the wrench 4 moving from the intermediate position to the closed position, the jaw drive tube 32 moves distally to drive the sleeve 35 distally, thereby driving the jaw assembly 14 to close.

[0091] The jaw drive mechanism also includes a first reset member 36, which is a spring. The first reset member 36 is disposed inside the head housing 2 of the clamping pliers and sleeved outside the jaw drive tube 32. The proximal end of the first reset member 36 abuts against the 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 is used to store energy when the jaw drive mechanism advances, and releases the energy when the first reset member 36 recovers its deformation, thereby providing power for the jaw drive mechanism to reset and retract.

[0092] 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 its 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, under the action of the first reset element 36, the sleeve 35 moves proximally, allowing the jaw assembly 14 to extend from the distal end of the sleeve 35. The second reset element releases energy, causing the jaw assembly 14 to open.

[0093] refer to Figures 5A-5B The 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.

[0094] refer to Figure 4 , Figures 5A-5B , Figures 6A-6B The clamping drive mechanism includes a clamping assembly and a clamping drive tube 43. The clamping drive tube 43 is partially located within the jaw drive tube 32 and is capable of axial movement within the jaw drive tube 32. The proximal end of the clamping assembly is connected to the clamping drive tube 43. In response to the forward movement of the wrench 4 from the open position, the clamping drive tube 43 moves distally to drive the clamping assembly to move distally, causing the clamping assembly to drive the clamp 22 from the clamping chamber 6 into the jaw assembly 14. The base 37 has a guide groove 38 for receiving the clamping assembly and allowing its axial movement. The distal end of the guide groove 38 has a guide surface 39, which is an inclined surface and angled to the axial direction. When the base 37 is installed in the clamping chamber 6, the guide surface 39 faces proximally 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.

[0095] The clamping drive mechanism also includes a third reset element 45, which is a spring. (Reference) Figure 4 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.

[0096] refer to Figures 5A-5B , Figures 6A-6B , Figures 6C-6DThe 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 axial movement within the guide groove 38 and causing obstruction of the clamping assembly.

[0097] refer to Figures 5A-5B , Figures 6A-6B , Figures 6C-6D The 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.

[0098] After the clamp 22 is gripped 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 axially proximally 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.

[0099] refer to Figure 4 , Figure 5B and Figure 6B 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 can move axially within the feed drive tube 43.

[0100] refer to Figures 5A-5B , Figures 6A-6BFor 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 from the side cavity, specifically causing the distal end of the pusher block 31 to extend out of the side cavity and tilt towards the clamp 22. As the pusher seat 46 moves axially forward, the distal end of each pusher block 31 abuts against and pushes a clamp 22 forward, causing the clamp 22 to move forward axially. 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 (clamps 22 other than the first clamp) in the clamping chamber 6 forward by one station. When the push clamp seat 46 retracts axially, 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 abut against the clamp and rotate into the side cavity under the pressure of the clamp 22, thus avoiding the clamp 22. This prevents the push clamp block 31 from retracting with the clamp 22, thereby allowing the push clamp block 31 to move to the radial side of the corresponding clamp 22 in the clamping chamber and overlap with it.

[0101] As mentioned above, the clamping pliers include a transmission mechanism. The wrench 4 drives the transmission mechanism to move, causing the clamping drive mechanism to perform the clamping action, the jaw drive mechanism to perform the clamping action, and the pushing drive mechanism to perform the pushing action.

[0102] Specifically, the transmission mechanism also includes a switching mechanism and a coupling mechanism. The following section will use... Figure 4 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:

[0103] refer to Figure 4 , Figure 16-19 , Figure 24 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 16 (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.

[0104] The clamping drive tube 43 is sleeved on the outside of the clamping seat 46. Part of the clamping drive tube 43 is located inside the jaw drive tube 32 and can move axially within 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.

[0105] The clutch switching mechanism includes a guide post 65 and a guide rail. The upper end of the first clutch element 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 device includes a first head housing 90 and a second head housing 2. The first head housing 90 and the second head housing 2 are symmetrically arranged along the axial direction. The guide rails are symmetrically arranged on the inner walls of the first head housing 90 and the second head housing 2. 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 2 is also provided with a guide rail.

[0106] 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 on 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 2, and can move on 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.

[0107] 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.

[0108] As the wrench 4 drives the clamp feeding 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.

[0109] 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.

[0110] refer to Figure 4 , Figure 16-19 , Figure 24 ,and Figures 29-30 The 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. A clamping drive tube is drivably connected to the upper rack 69, and the movement of the clamping drive tube is in the same direction as the upper rack 69. Specifically, as described above, a seat 62 is drivably connected to the clamping drive tube, and the seat 62 is connected to the upper rack 69. A pusher 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 axially, and the first gear and the second gear are located between the upper rack 69 and the lower rack 70. The push-clamp drive mechanism also includes a fourth reset member 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 member 68 is a spring.

[0111] The clamp also includes a backstop mechanism, which can stop the clamping drive mechanism from moving backward the moment the first clutch 63 of the switching mechanism separates from the clamping drive mechanism. When the wrench 4 is in the middle position, the user releases the wrench 4, and the backstop mechanism still stops the clamping drive mechanism from moving backward, as described later.

[0112] refer to Figure 24 as well as Figures 31 to 34 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 bias spring 74 provides a thrust to the guide pivot 73, causing the guide pivot 73 to tend to rotate clockwise. The guide pivot 73 is provided with an anti-reverse portion 79. The wrench 4 is movably connected to the guide pivot 73. During the movement of the wrench 4 from the open position to the intermediate position, the bias spring 74 pushes the guide pivot 73 to rotate, causing the anti-reverse portion 79 to approach and abut against the feed drive tube 43 to prevent it from retracting.

[0113] Specifically, the guide pivot 73 further includes a force-receiving portion 77, a guiding portion 78, a first rotating arm 80 extending proximally from the pivot portion 76, and a second rotating arm 81 extending distally from the pivot portion 76. The guide pivot 73 also includes a third rotating arm 82 extending obliquely upward from the pivot portion 76, the third rotating arm 82 forming an obtuse angle with the first rotating arm 80. The end of the first rotating arm 80 is the force-receiving portion 77, the end of the second rotating arm 81 is the guiding portion 78, and the end of the third rotating arm 82 is the stop portion 79.

[0114] 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 24 (The placement angle of the clamps is for reference).

[0115] refer to Figure 33 The wrench 4 is provided with a pivot end 85 that is pivotally connected to the housing, and the wrench 4 can rotate about the pivot end 85. The wrench 4 also has a guide channel 86. (Reference) Figure 31 and Figure 32 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 about its pivot end 85, the guide channel 86 rotates accordingly, causing the guide member 75 to rotate about the first pivot axis 76 of the pivot portion 76 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.

[0116] refer to Figure 34 The guide channel 86 includes a starting point a, a stop point b, and an end point c. The distances from the starting point a to the pivot end 85 of the wrench 4 and from the end point c to the pivot end 85 of the wrench 4 are both less than the distance from the stop point b 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 c.

[0117] 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 c at its two ends. A stop point b is 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.

[0118] 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 intermediate position, the wrench 4 drives the guide 75 to rotate clockwise from the starting point a and rise upwards into the channel 89 under the action of the bias spring 74, then moves within the channel 89 to the stop point b. When the wrench 4 moves from the intermediate position to the closed position, the wrench 4 drives the guide 75 to move downwards from the stop point b in the channel 89 to the end point c of the main channel 87. When the guide 75 enters the channel 89, the guide pivot 73 rotates upwards, causing the stop portion 79 of the guide pivot 73 to move upwards.

[0119] refer to Figure 34 The channel 89 includes a blocking wall 84. The main channel 87 includes a first wall extending from the starting point a to connect with the blocking wall 84, the first wall and the blocking wall 84 forming a right angle or an acute angle. This simple angular design of the guide channel 86 ensures that the blocking wall 84 effectively prevents the guide 75 from retracting from the stop point b back to the starting point a, allowing the wrench 4 to remain in the intermediate position.

[0120] To enable the guide member 75 to move from the stop point b to the end point c, the channel 89 also includes a guide wall 83. The main channel 87 also includes a second wall extending from the end point c to connect with the guide wall 83, the second wall forming an obtuse angle with the guide wall 83. 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 c.

[0121] refer to Figure 33 and Figure 34 When the user presses the wrench 4, the wrench 4 moves from the open position to the middle position. When the guide 75 moves from the starting point a to the stop point b, 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. At this time, the clamping pliers are in the clamping completed state, the clamp 22 is in the ready position, and the stop part 79 moves up to abut against the clamping drive tube 43 to prevent it from moving backward.

[0122] As the user continues to press the wrench 4, the wrench 4 moves from the middle position, causing the guide 75 to move from the stop point b to the end point c. The guide 75 continues to move through 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 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).

[0123] 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 c in the main channel 87, the stop part 79 moves to below the clamping drive tube 43, and the stop part 79 separates from the clamping drive tube 43. The clamping drive tube 43 then retracts and resets under the action of the third reset member 45. When the guide 75 reaches the end point c, the clamping pliers are in the clamping completed state, and the clamp 22 held in the jaw assembly 14 is compressed to the closed state. 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.

[0124] The following details the working process of the clamping pliers' transmission mechanism in performing the clamping, clamping, and pushing actions:

[0125] When the wrench 4 is in the open position, the multiple push clamp blocks 31 are respectively located in front of the second to Nth clamps. The user presses the wrench 4, causing it to move from the open position towards the center position. The wrench 4 pushes against the seat 62 of the switching mechanism, causing the switching mechanism to move further away. The guide post 65 moves on the first guide surface 66, and the first clutch 63 moves forward with the switching mechanism, driving the clamp delivery drive mechanism to move further away to perform the clamp delivery action. Simultaneously, the upper rack 69 moves further away. During the movement of the upper rack 69 further away, the upper rack 69 drives the lower rack 70 to retract via the intermediate member 71. Since the lower rack 70 is connected to the push clamp seat 46, it further drives the push clamp seat 46 to retract, causing the fourth reset member 68 to store energy, and the multiple push clamp blocks 31 to move closer to the center.

[0126] When the wrench 4 reaches the middle 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. Simultaneously, 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. The guide member 75 of the anti-reverse mechanism enters the secondary channel 89 from the main channel 87 of the guide channel 86, and the guide pivot 73 rotates upward, emitting a "click" sound to indicate to the user that the wrench has reached the middle position. At this time, the wrench 4 is released, and the wrench 4 remains in the middle position due to the blocking wall 84 of the guide channel 86. Under the action of the anti-reverse mechanism, the clamping block 42 of the clamping drive mechanism continues to abut against the clamp 22 from the rear end, keeping the clamp 22 in the jaw assembly 14. Figure 6A and Figure 6B As shown, each push clamping block 31 moves to one side of the second to Nth clamps in the radial direction of the clamping chamber 6. For example, taking the push clamping block 31 located in front of the second clamp when the wrench 4 is in the open position as an example, that is... Figure 5A , 5BThe farthest pushing clamping block 31 moves proximally to the side of the second clamp in the radial direction of the clamping chamber 6, where the two overlap radially in the clamping chamber 6, as shown. Figure 6A , 6B As shown, the pusher block 31 has not yet moved to the rear side of the second clamp. The radial direction of the clamping chamber 6 is perpendicular to the axial direction of the clamping chamber 6, and extends along the width direction of the clamping chamber. Figure 6A For example, the radial direction of the clamp 6 is perpendicular to the plane of the drawing.

[0127] When wrench 4 is in the middle position, pressing wrench 4 causes it to move from the middle position towards the closed position. The anti-reverse mechanism gradually disengages from the clamping drive tube 43. Under the action of wrench 4, the switching mechanism continues to push the jaw drive mechanism and the upper rack 69 forward. Simultaneously, 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, and the jaw drive tube 32 drives the sleeve 35 forward to close the jaw assembly 14. When 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. Figure 6C , 6D As shown, each push clamp block 31 moves proximally to the rear side of the second to Nth clamps. Taking the push clamp block 31 located in front of the second clamp when the wrench 4 is in the open position as an example, this push clamp block 31 moves to the rear side of the second clamp. When the wrench 4 is released, the jaw drive mechanism resets under the action of the first reset member 36, and the push clamp seat 46 moves forward under the action of the fourth reset member 68 to move the other clamps in the clamping chamber 6 forward by one position (the push clamping action is completed).

[0128] During the process of wrench 4 returning from the closed position to the open position, a pushing action is performed. When the clamp moves forward one station, it may rush forward a large distance due to inertia, which may cause the clamps in the clamping chamber to become disordered and affect the next clamping operation.

[0129] To solve the above problems, please refer to... Figure 25 and Figure 26 In this application, a first stop 601 is provided on the inner wall of the clamping chamber 6 on the front side of the second clamp to the Nth clamp, that is, a first stop 601 is provided at each work station of the clamping chamber.

[0130] refer to Figure 26 ,by Figure 26 Clip 22 in the example is the second clip. Refer to the reference. Figure 26 , Figure 16 as well as Figures 5A-5BWhen the wrench 4 is in the open position, the push clamp block 31 is located behind the first clamp, and correspondingly, the push clamp block 31 is located in front of the second clamp. Understandably, from the far end of the clamping chamber 6 to the near end of the clamping chamber, the other push clamp blocks are located in front of the third to Nth clamps in sequence.

[0131] In response to the wrench 4 moving from the closed position to the open position, multiple push-clamp blocks 31 move forward to drive their respective clamps past the first stop and then move distally to the previous station, i.e., the adjacent distal station. (Reference) Figure 28 During this process, the clamp moves forward. If the clamp rushes forward due to inertia, it will eventually be limited by the first stop 601 of the previous station and stop near the first stop 601 of the previous station.

[0132] The following is a detailed explanation; when the wrench is in the middle position, refer to... Figure 27The push clamp 31 moves to the side of the clamp in the radial direction of the clamping chamber 6, and the two overlap in the radial direction of the clamping chamber 6. Assuming that the length of the overlapping area between the push clamp 31 and the clamp in the axial direction is S1, the distance S2 between the first stop 601 and the clamp 22 should be less than or equal to S1. Specifically, the distance S2 between the first stop 601 and the second ear 29 on the first clamping arm 27 of the clamp is less than or equal to S1. Taking one of the clamps as an example, during normal operation, when the handle is in the middle position, the push clamp block 31 moves closer to the clamp until it overlaps with the clamp by a length of S1. If the clamp moves forward due to inertia during subsequent clamping, it will eventually be blocked by the first stop 601. The maximum forward distance of the clamp is S2. When S2 is less than S1, meaning the maximum forward distance S2 is less than S1, then during the next clamping operation, when the handle moves from the open position to the middle position, the push clamp block 31 can still be located on the side of the clamp and overlap with it, without falling to the back of the clamp. Even if the handle is accidentally released and returns to the open position, the push clamp block 31 will not clamp the clamp. The clamp is pushed forward to prevent the clamps in the clamping chamber from becoming disordered. However, if the distance S2 between the first stop 601 and the clamp is greater than S1, it means that the clamp can move forward a greater distance during the clamping process and cannot stop exactly at the previous position. In the next clamping operation, when the handle moves from the open position to the middle position, the corresponding push block 31 will fall to the rear of the clamp because the clamp is too far forward. If the handle is accidentally released at this time and returns to the open position, the clamp will be pushed forward one position by the push block 31. At this time, the clamp at the previous position has not moved forward, which will cause the two clamps to jam together, and the clamping pliers cannot continue to be used. Understandably, the resistance of the first stop 601 to the clamp 22 should be configured to be less than the reset force given by the fourth reset member 68 to the push clamp seat 46, so as not to affect the normal clamping action of the push block. It should be noted that, without considering the inertia of the clamp moving forward, during normal clamping action, the distance that the clamping block 31 moves to the far side is the distance that the clamp 22 moves forward, that is, the distance that the clamp moves forward by one station. After the clamp moves forward by one station, the first ear 25 of the clamp is still located near the first stop 601.

[0133] The specific configuration of the first stop 601 is not limited. For example, refer to... Figure 26 The first stop 601 is a protrusion or recess provided on the inner wall of the clamping chamber 6.

[0134] In other embodiments, in the axial direction, the first stop 601 is a friction zone located on the inner wall of the clamping chamber 6, and the coefficient of friction in the friction zone is greater than that of the inner walls of the clamping chamber 6 on both sides of the first stop 601. The resistance encountered by the clamp 22 when it moves forward in the friction zone is greater than the resistance encountered when it moves forward along the inner walls of the clamping chamber 6 on both sides of the first stop 601. Thus, when the clamp 22 moves forward into the friction zone, it will encounter greater resistance, which can counteract the inertial force of the clamp moving forward.

[0135] The method of obtaining the friction zone is also flexible. For example, the friction zone can be formed by directly roughening the inner wall of the clamping chamber 6, or a layer of medium with a larger roughness can be added to the inner wall.

[0136] like Figure 26-28 As shown, a second stop 602 is also provided between the clamp 22 and the first stop 601. The second stop 602 is closer to the clamp 22. The second stop 602 can also be a protrusion, pit, or friction area on the inner wall of the clamping chamber 6. The second stop 602 and the first stop 601 together form a continuous buffer area to limit the clamp and prevent it from moving forward due to inertia. At the same time, the second stop 602 can also prevent the clamp 22 from shifting during transportation. In this embodiment, the second stop 602 is specifically a protrusion. As mentioned above, without considering the clamp's forward momentum, during normal clamping action, after the clamp moves forward one position, the ear 25 of the clamp should be located near the second stop 602.

[0137] In addition, the types of the first stop portion 601 and the second stop portion 602 may be the same or different.

[0138] When both the first stop 601 and the second stop 602 are friction zones, the inner wall between them is not a friction zone. Optionally, when both the first stop 601 and the second stop 602 are friction zones, the inner wall between them is also a friction zone, thus forming a continuous friction zone together. In this case, the inner wall of the clamping chamber 6 has a friction zone of a certain length. Axially, the length of the friction zone is the distance between the distal side of the first stop 601 and the proximal side of the second stop 602. This arrangement allows for the one-time machining of a sufficiently long friction zone without the need to segmentally determine the starting positions of the first stop 601 and the second stop 602, thus simplifying design and manufacturing.

[0139] In other embodiments, based on the foregoing embodiments, the wrench 4 divides an intermediate position into two intermediate positions, namely a first intermediate position and a second intermediate position.

[0140] Specifically, the wrench 4 has an open position (such as...) Figure 1The position of wrench 4 shown), the first middle position (as shown) Figure 17 The position of wrench 4 shown), the second middle position (as shown) Figure 18 The position of wrench 4 shown) and the closed position (as shown) Figure 19 (The position of the wrench 4 is shown). When the wrench 4 moves forward from the open position under the action of external force, the free end of the wrench 4 gradually approaches the handle housing 3. Further, the wrench 4 moves forward from the open position to the first intermediate position and stays in the first intermediate position. At this time, if the external force is removed and the wrench 4 is released, the wrench 4 will move backward from the first intermediate position to the second intermediate position. If the wrench 4 is pressed down again, the wrench 4 will move forward from the second intermediate position to the closed position. When the wrench 4 is in the closed position, when the wrench 4 is released, the wrench 4 moves backward from the closed position to the open position.

[0141] Reference Figure 1 and Figure 4 The transmission mechanism includes a clamp delivery drive mechanism, a jaw drive mechanism, and a clamp push 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 clamping chamber 6 to move into the jaw assembly 14, at which point the clamping forceps are in the clamp delivery completed state; and the clamp push block 31 of the clamp push drive mechanism moves proximally to the rear side of the clamp 22. 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, thereby closing the clamp 22 held in the jaw assembly 14 to clamp tissue or blood vessels. In response to the wrench 4 moving in the reverse direction from the closed position to the open position, the clamp push block 31 of the clamp push drive mechanism pushes the clamp 22 of the clamping chamber 22 forward one position.

[0142] refer to Figure 1 In this embodiment, the limiting mechanism includes a stop unit 24 and an abutment unit 28. The stop unit 24 is disposed in the housing, preferably in the handle housing 3. In this application, the stop unit 24 and the abutment unit 28 cooperate to achieve stopping at a first intermediate position and to achieve reverse movement from the first intermediate position to a second intermediate position. The implementation of the stop unit 24 and the abutment unit 28 will be further illustrated below with reference to the accompanying drawings.

[0143] refer to Figure 7-11 and combined Figure 20-23 ,by Figure 20The placement angle of the middle limiting mechanism is for reference. In this embodiment, both the first and second directions are vertical, with the first direction from top to bottom and the second direction from bottom to top. The abutting unit 28 in this embodiment includes a pushing member 52 and a rotating member 105, both of which are movably connected to the stop unit 24. The elastic member 120 is connected to the rotating member 105, and the limiting part 110 and the clearance groove 111 are both provided on the rotating member 105. In response to the forward movement of the wrench 4, the wrench 4 drives the pushing member 52 to move along the first direction, thereby driving the rotating member 105 to move along the first direction, and the elastic member 120 is compressed to store energy. In response to the reverse movement of the wrench 4, the elastic member 120 releases energy to drive the rotating member 105 to move along the second direction, causing the pushing member 52 to move along the second direction.

[0144] The stop unit 24 has a stop portion 49. The abutment unit 28 is movably connected to the stop unit 24 so that the abutment unit 28 can move relative to the stop unit 24. When the wrench 4 is in the open position, the limiting portion 110 of the abutment unit 28 is aligned with the stop portion 49 of the stop unit 24.

[0145] Wrench 4 is in the open position (e.g.) Figure 16 When force is applied to the wrench 4, the wrench 4 moves forward to drive the abutment unit 28 to move along the first direction until its limiting part 110 abuts against the stop part 49 of the stop unit 24, so that the wrench 4 can no longer move and stops at the first intermediate position, thereby allowing the user to determine that the wrench 4 has reached the first intermediate position (e.g., Figure 17 The position of the wrench 4 allows the user to accurately press the wrench 4 to the middle position. At this time, the clamp 22 is fed into the jaw assembly 14 by the clamping drive mechanism.

[0146] When wrench 4 is in the first intermediate position, in response to the removal of force applied to wrench 4, wrench 4 moves in the opposite direction to the second intermediate position (e.g., Figure 18 When the wrench 4 is in the first intermediate position, the abutment unit 28 moves in a second direction opposite to the first direction until its limiting part 110 disengages from the stop part 49 of the stop unit 24, and its clearance groove 111 aligns with the stop part 49 of the stop unit 24. When the wrench is in the first intermediate position, the clamp is held in the jaw assembly 14. At this time, the user can adjust the angle of the jaw assembly 14 so that the clamp 22 in the jaw assembly 14 is aligned with the target tissue or blood vessel. The user can also release the wrench 4 to remove the force applied to it, so that when the wrench 4 is in the second intermediate position, it is easier for the user to adjust the angle of the jaw assembly 14.

[0147] When 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 unit 28 to move, causing the stop portion 49 of the stop unit 24 to enter the relief groove 111 of the abutment unit 28 and move within the relief groove 111 until the wrench 4 reaches the closed position. The wrench 4 is in the closed position (e.g., Figure 19 When the middle wrench is in position 4, the clamp 22 in the jaw assembly 14 is closed and clamps the tissue or blood vessel.

[0148] Because of the limiting mechanism, when the wrench 4 moves to the first intermediate position, the limiting part 110 of the abutting unit 28 abuts against the stopping part 49 of the stopping unit 24, preventing the wrench 4 from moving further. It must be released to return the wrench 4 to the second intermediate position, and then pressed again to bring the wrench 4 to 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. When the wrench 4 is in the first intermediate position, the clamp 22 is located in the jaw assembly 14. The user can adjust the angle of the jaw assembly 14 to align the clamp 22 with the target tissue or blood vessel, thereby accurately applying the clamp 22 to the target tissue or blood vessel, improving the ease and reliability of the clamp application.

[0149] 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 abutment unit 28 moves along the second direction until its relief groove 111 disengages from the stop portion 49 of the stop unit 24, and its limiting portion 110 aligns with the stop portion 49 of the stop unit 24. During the process of the wrench 4 moving from the closed position to the open position, under the action of the first reset member 36, the sleeve 35 moves proximally, causing the jaw assembly 14 to extend from the distal end of the sleeve 35. At the same time, the second reset member releases energy to open the jaw assembly 14, and the clamp 22 disengages from the jaw assembly 14 and clamps the tissue or blood vessel.

[0150] refer to Figure 20 In this embodiment, the limiting mechanism also includes an elastic element 120, which is connected to the abutment unit 28. In response to the forward movement of the wrench 4, the abutment unit 28 moves along a first direction, and the elastic element 120 is compressed to store energy. In response to the reverse movement of the wrench 4, the elastic element 120 releases energy to drive the abutment unit 28 to move along a second direction.

[0151] The stop unit 24 also has a guide ramp 21, and the rotating member 105 also has a sliding ramp. In response to the reverse movement of the wrench 4, when the rotating member 105 moves in the second direction until its sliding ramp is located on the guide ramp 21, the sliding ramp moves along the guide ramp 21 to cause the rotating member 105 to rotate about its own axis.

[0152] Specifically, in response to the wrench 4 moving in the opposite direction from the first intermediate position to the second intermediate position, the rotating member 105 moves along the second direction, causing the limiting part 110 of the rotating member 105 to disengage from the stop part 49 of the stop unit 24. When the rotating member 105 moves along the second direction to the point where its sliding inclined surface is located on the guide inclined surface 21, the sliding inclined surface moves along the guide inclined surface 21 to make the rotating member 105 rotate around its own axis, so that the clearance groove 111 of the rotating member 105 is aligned with the stop part 49 of the stop unit 24.

[0153] In response to the wrench 4 moving from the closed position to the open position, the rotating member 105 moves in the second direction, causing its clearance groove 111 to disengage from the stop portion 49 of the stop unit 24. When the rotating member 105 moves in the second direction until its sliding inclined surface is located on the guide inclined surface 21, the sliding inclined surface moves along the guide inclined surface 21 to make the rotating member 105 rotate about its own axis, so that the limiting portion 110 of the rotating member 105 is aligned with the stop portion 49 of the stop unit 24.

[0154] refer to Figure 12-15 and combined Figure 20-23 The stop unit 24 has a first end and a second end opposite to each other along a first direction. A boss 20 extending along the first direction is also provided inside the stop unit 24. One end of the boss 20 is located at the first end of the stop unit 24, and the other end of the boss 20 extends toward the second end of the stop unit 24 and is provided with a guide slope 21. A stop portion 49 is provided inside the stop unit 24 and at the second end of the stop unit 24.

[0155] Additionally, please refer to Figure 8-9 The rotating member 105 is disposed inside the stop unit 24 and can move within the stop unit 24. The rotating member 105 has a first end 106 and a second end 109 opposite each other along a first direction. A sliding inclined surface is disposed at the first end 106 of the rotating member 105, and a limiting part 110 and a relief groove 111 are both disposed at the second end 109 of the rotating member 105.

[0156] The first end 106 of the rotating member 105 is also provided with a sliding unit 125, which includes a first sliding part 112 and a second sliding part 116. The first sliding part 112 is disposed on the left side of the second sliding part 116. Figure 20 (For reference only). The sliding slope of the rotating member 105 includes a first sliding slope 115 and a second sliding slope. The first sliding slope 115 is disposed on the first sliding part 112, and the second sliding slope is disposed on the second sliding part 116.

[0157] For details, please refer to Figure 8-9 , Figure 20The first sliding inclined surface 115 is disposed at the end of the first sliding portion 112 along the first direction. The first sliding portion 112 also has a first sidewall portion 113 and a second sidewall portion 114, with the first sidewall portion 113 disposed to the left of the second sidewall portion 114. Figure 20 (For reference). The second sliding part 116 has a third sidewall part 117 and a fourth sidewall part 118, the third sidewall part 117 being disposed on the left side of the fourth sidewall part 118 (for reference). Figure 20 (For reference), the third sidewall portion 117 forms the second sliding slope.

[0158] The rotating member 105 also includes a locking groove 108, into which a second sliding ramp (third sidewall portion 117) extends. Specifically, the second sliding ramp (third sidewall portion 117) of the second sliding portion 116 extends to intersect with the second sidewall portion 114 of the first sliding portion 112, thereby forming a locking groove 108 between the first sliding portion 112 and the second sliding portion 116. The second sliding ramp (third sidewall portion 117) extending to intersect with the second sidewall portion 114 is equivalent to the second sliding ramp (third sidewall portion 117) extending into the locking groove 108. The boss 20 can move along the second sliding ramp (third sidewall portion 117) into the locking groove 108, and the second sidewall portion 114 of the first sliding portion 112 constitutes a retaining wall for the locking groove 108.

[0159] The elastic element 120 is disposed between the stop unit 24 and the rotating element 105. Specifically, the second end 109 of the rotating element 105 is provided with a first receiving groove, one end of the elastic element 120 is received in the first receiving groove, and the other end is connected to the stop unit 24.

[0160] refer to Figure 10-11 , Figure 20 The push member 52 has a force-receiving end 53 and a guide end 55 opposite each other along a first direction. At least when the wrench 4 is in the open position and the second intermediate position, the force-receiving end 53 of the push member 52 is located outside the stop unit 24, so that the wrench 4 can abut against the force-receiving end 53 of the push member 52 during forward movement to drive the push member 52 to move. The guide end 55 of the push member 52 is located inside the stop unit 24, and the guide end 55 of the push member 52 is provided with a guide ramp. The sliding ramp of the first end 106 of the rotating member 105 is movably located on the guide ramp of the guide end 55 of the push member 52.

[0161] refer to Figure 8-11 , Figure 20The rotating member 105 also has a limiting groove 107 extending along a first direction, and the pushing member 52 also has a sliding groove 56 extending along the first direction. When the wrench 4 is in the open position, a portion of the boss 20 is movably placed in the sliding groove 56, and a portion of the boss 20 is movably placed in the limiting groove 107. When the pushing member 52 moves, the boss 20 slides relative to the sliding groove 56, and the sliding groove 56 never disengages from the boss 20, so that the pushing member 52 moves linearly along the first or second direction without rotating. When the rotating member 105 moves along the first direction, the rotating member 105 can move until its limiting groove 107 disengages from the boss 20, as described below.

[0162] refer to Figure 16-17 , Figure 20-21 During the movement of the wrench 4 from the open position to the first intermediate position, since the boss 20 is located in the limiting groove 107, the rotating member 105 first moves linearly along the first direction. When the rotating member 105 moves linearly along the first direction until its limiting groove 107 disengages from the boss 20, the first sliding inclined surface 115 and the second sliding inclined surface (third side wall portion 117) of the rotating member 105 both move along the guide inclined surface of the pushing member 52, causing the rotating member 105 to rotate around its own axis. When the wrench 4 reaches the first intermediate position, the rotating member 105 stops moving, and the limiting portion 110 of the rotating member 105 abuts against the stop portion 49 of the stop unit 24. When the wrench 4 reaches the first intermediate position, the second sliding slope (third side wall portion 117) of the rotating member 105 is projected onto the guide slope 21 of the boss 20 along the second direction, so that when the rotating member 105 moves along the second direction, the second sliding slope (third side wall portion 117) of the rotating member 105 can move onto the guide slope 21 of the boss 20.

[0163] refer to Figure 17-18 , Figure 21-22 During the process of the wrench 4 moving from the first intermediate position to the second intermediate position, the rotating member 105 moves towards the boss 20 along the second direction. When the rotating member 105 moves along the second direction to the point where its second sliding slope (third side wall portion 117) is located on the guide slope 21 of the boss 20, the second sliding slope (third side wall portion 117) moves along the guide slope 21 of the boss 20, causing the rotating member 105 to rotate around its own axis. When the second sliding slope (third side wall portion 117) moves along the guide slope 21 of the boss 20 until the boss 20 enters the locking groove 108, the rotating member 105 stops moving. At this time, the wrench 4 reaches the second intermediate position, the limiting portion 110 of the rotating member 105 disengages from the stop portion 49, and the clearance groove 111 of the rotating member 105 aligns with the stop portion 49.

[0164] Figure 18-19 , Figure 22-23During the movement of the wrench 4 from the second intermediate position to the closed position, since the boss 20 is located in the locking groove 108, the rotating member 105 first moves linearly along the first direction. When the rotating member 105 moves linearly along the first direction until its locking groove 108 disengages from the boss 20, the first sliding inclined surface 115 of the rotating member 105 moves along the guide inclined surface of the pusher 52, causing the rotating member 105 to rotate around its own axis. When the wrench 4 reaches the closed position, the rotating member 105 stops moving, and the stop part 49 is located in the relief groove 111 of the rotating member 105. Moreover, when the wrench 4 reaches the closed position, the orthographic projection of the first sliding inclined surface 115 of the rotating member 105 along the second direction falls on the guide inclined surface 21 of the boss 20, so that when the rotating member 105 moves along the second direction, the first sliding inclined surface 115 of the rotating member 105 can move onto the guide inclined surface 21 of the boss 20.

[0165] refer to Figure 16 , 19 20, 24, in response to the wrench 4 moving from the closed position to the open position, the rotating member 105 moves towards the boss 20 in the second direction. When the rotating member 105 moves in the second direction to the point where its first sliding slope 115 is located on the guide slope 21 of the boss 20, the first sliding slope 115 moves along the guide slope 21 of the boss 20, causing the rotating member 105 to rotate around its own axis. When the wrench 4 reaches the open position, the rotating member 105 stops moving, the relief groove 111 of the rotating member 105 disengages from the stop portion 49, and the limiting portion 110 of the rotating member 105 aligns with the stop portion 49.

[0166] refer to Figure 10-11 The guide end 55 of the pusher 52 is provided with multiple guide units 57, each guide unit 57 including the aforementioned guide slope. During the process of the wrench 4 moving from the open position to the closed position, the sliding unit 125 of the rotating member 105 moves from one guide unit 57 to another. Specifically, when the wrench 4 is in the open position, the sliding unit 125 of the rotating member 105 is located at one of the guide units 57 and cooperates with that guide unit 57. During the process of the wrench 4 moving from the open position to the closed position, reference... Figure 23 The sliding unit 125 of the rotating member 105 moves to a position partially located at one of the guide units 57 and partially located at the other guide unit 57. When the wrench 4 moves from the closed position to the open position, the sliding unit 125 of the rotating member 105 moves to a position completely located at the other guide unit 57 and engages with the other guide unit 57.

[0167] The aforementioned "one of the guide units 57" is adjacent to "the other guide unit 57". For clarity, the "one of the guide units 57" is named the first guide unit 57, and the "other guide unit 57" is named the second guide unit 57.

[0168] refer to Figure 10-11 Each guide unit 57 of the pusher 52 includes a first guide slope, a second guide slope, and a third guide slope. Each guide unit 57 of the pusher 52 also includes a first guide portion 58 and a second guide portion 61, with the first guide portion 58 disposed to the left of the second guide portion 61 (towards...). Figure 10 (For reference only). The first guide portion 58 includes a first wall portion 59 and a second wall portion 60, wherein the first wall portion 59 is disposed on the left side of the second wall portion 60 (for reference only). Figure 10 (For reference only), the second guide section 61 includes a third wall section 103 and a fourth wall section 104.

[0169] The second wall portion 60 of the first guide portion 58 forms a first guide slope, the third wall portion 103 of the second guide portion 61 forms a second guide slope, and the fourth wall portion 104 of the second guide portion 61 forms a third guide slope.

[0170] The first guide slope (second wall portion 60) intersects the second guide slope (third wall portion 103) at an angle, which can be an obtuse angle, an acute angle, or a right angle. This creates a V-shaped groove between the first guide slope (second wall portion 60) and the second guide slope (third wall portion 103). The first guide slope (second wall portion 60) and the second guide slope (third wall portion 103) are the two inner walls of the V-shaped groove, respectively. Figure 10 With the angle as a reference, the opening of the V-groove faces downwards, and the apex of the V-groove is above its opening.

[0171] The cooperation between the guide unit 57 of the pushing member 52 and the sliding unit 125 of the rotating member 105 will now be described in detail with reference to the accompanying drawings. As mentioned above, the sliding unit 125 of the rotating member 105 includes a first sliding part 112 and a second sliding part 116. The first sliding part 112 has a first sliding slope 115, and the second sliding part 116 has a second sliding slope (third sidewall part 117).

[0172] refer to Figure 16 , Figure 20 When the wrench 4 is in the open position, the first sliding inclined surface 115 of the rotating member 105 is movably located on the first guide inclined surface (second wall portion 60) of the first guide unit 57 of the abutment member, the second sliding inclined surface (third side wall portion 117) of the rotating member 105 is movably located on the third guide inclined surface (fourth wall portion 104) of the first guide unit 57, the boss 20 is partially located in the limiting groove 107 of the rotating member 105, and the limiting portion 110 of the rotating member 105 is aligned with the stopping portion 49 of the stopping unit 24.

[0173] refer to Figure 16-17 , Figure 20-21During the process of the wrench 4 moving from the open position to the first intermediate position, the wrench 4 drives the pushing member 52 to move in the first direction, thereby driving the rotating member 105 to move. The limiting groove 107 of the rotating member 105 slides relative to the boss 20, causing the rotating member 105 to move in the first direction. When the limiting groove 107 of the rotating member 105 disengages from the boss 20, the first sliding inclined surface 115 of the rotating member 105 moves along the first guide inclined surface (second wall portion 60) of the first guide unit 57, and the second sliding inclined surface (third side wall portion 117) of the rotating member 105 moves along the third guide inclined surface (fourth wall portion 104) of the first guide unit 57, causing the rotating member 105 to rotate counterclockwise around its own axis (to... Figure 20 (For reference only).

[0174] refer to Figure 17 , Figure 21 When the wrench 4 reaches the first intermediate position, the first sliding part 112 of the rotating member 105 moves to the apex of the V-shaped groove of the first guide unit 57. At this time, the limiting part 110 of the rotating member 105 abuts against the stopping part 49 of the stopping unit 24. Meanwhile, the user continues to apply force to the wrench 4, so that the first sliding part 112 of the rotating member 105 no longer moves, and the rotating member 105 stops moving. At this time, the third guide slope (fourth wall part 104) of the first guide unit 57 is movably located on the second sliding slope (third side wall part 117) of the rotating member 105.

[0175] refer to Figure 17-18 , Figure 21-22 Before the wrench 4 moves from the first intermediate position to the second intermediate position, the elastic element 120 releases energy, causing the rotating element 105 to move in the second direction. When the rotating element 105 moves to the point where its second sliding inclined surface (third side wall portion 117) is located on the guide inclined surface 21 of the boss 20, the second sliding inclined surface (third side wall portion 117) moves along the guide inclined surface 21 of the boss 20, causing the rotating element 105 to rotate counterclockwise around its own axis (in order to...). Figure 21 (For reference only).

[0176] refer to Figure 18 , Figure 22 When the wrench 4 reaches the second intermediate position, the rotating member 105 rotates until the boss 20 enters the locking groove 108 along the second sliding ramp (third side wall portion 117) and abuts against the stop wall of the locking groove 108, causing the rotating member 105 to stop rotating. At this time, the limiting portion 110 of the rotating member 105 disengages from the stop portion 49, and its clearance groove 111 aligns with the stop portion 49. At this time, the second sliding ramp (third side wall portion 117) of the rotating member 105 moves to the first guide ramp (second wall portion 60) of the second guide unit 57, and the first sliding ramp 115 of the rotating member 105 moves to the third guide ramp (fourth wall portion 104) of the first guide unit 57.

[0177] refer to Figure 10 , Figure 11 , Figure 22 Each guide unit 57 has a first guide portion 58 with a first wall portion 59 that is inclined, so that the second sliding portion 116 of the rotating member 105 can move along the first wall portion 59 of the first guide portion 58 of the second guide unit 57, so that the second sliding slope (third side wall portion 117) of the second sliding portion 116 of the rotating member 105 can move to the first guide slope (second wall portion 60) of the second guide unit 57.

[0178] refer to Figure 18-19 , Figure 22-23 During the process of the wrench 4 moving from the second intermediate position to the closed position, the wrench 4 drives the pushing member 52 to move along the first direction, thereby driving the rotating member 105 to move. The locking groove 108 of the rotating member 105 slides relative to the boss 20, causing the rotating member 105 to move along the first direction. When the locking groove 108 of the rotating member 105 disengages from the boss 20, the rotating member 105 continues to move along the first direction. The first sliding inclined surface 115 of the rotating member 105 moves along the third guide inclined surface (fourth wall portion 104) of the first guide unit 57, and the second sliding inclined surface (third side wall portion 117) of the rotating member 105 moves along the first guide inclined surface (second wall portion 60) of the second guide unit 57, causing the rotating member 105 to rotate counterclockwise around its own axis (to Figure 22 (For reference only).

[0179] refer to Figure 19 , Figure 23 When the wrench 4 reaches the closed position, the second sliding portion 116 of the rotating member 105 moves to the apex of the V-groove of the second guide unit 57. At this time, the user continues to apply force to the wrench 4, while the elastic member 120 is compressed and provides elastic force to the rotating member 105, so that the second sliding portion 116 of the rotating member 105 no longer moves, and the rotating member 105 stops moving. At this time, the first sliding ramp 115 of the rotating member 105 is still located on the third guide ramp (fourth wall portion 104) of the first guide unit 57.

[0180] refer to Figure 16 , 19 20, 24, During the process of the wrench 4 moving from the closed position to the open position, the elastic element 120 releases energy, causing the rotating element 105 to move in the second direction. When the rotating element 105 moves to the point where its first sliding inclined surface 115 is located on the guide inclined surface 21 of the boss 20, the first sliding inclined surface 115 moves along the guide inclined surface 21, causing the rotating element 105 to rotate counterclockwise around its own axis (towards...). Figure 20 (For reference only).

[0181] refer to Figure 16 , Figure 20 When the wrench 4 reaches the open position, the first sliding ramp 115 of the rotating member 105 moves to the first guide ramp (second wall 60) of the second guide unit 57, and the second sliding ramp (third side wall 117) of the rotating member 105 moves to the third guide ramp (fourth wall 104) of the second guide unit 57.

[0182] As described above, the first wall portion 59 of the first guide portion 58 of each guide unit 57 is an inclined surface, so that the first sliding portion 112 of the rotating member 105 can move along the first wall portion 59 of the first guide portion 58 of the second guide unit 57, so that the first sliding slope 115 of the first sliding portion 112 of the rotating member 105 can move to the first guide slope (second wall portion 60) of the second guide unit 57.

[0183] refer to Figure 10-11 The pusher 52 has multiple guide units 57 arranged at intervals along the circumference, and a groove 56 is provided between each two adjacent guide units 57. The rotating member 105 has multiple sliding units 125 arranged at intervals along the circumference, and a limiting groove 107 is provided between each two adjacent sliding units 125. The stop unit 24 has multiple bosses 20 arranged at intervals along the circumference.

[0184] The sliding unit 125 of the rotating member 105 and the guide unit 57 of the pushing member 52 are correspondingly arranged, and the sliding groove 56 of the pushing member 52, the limiting groove 107 of the rotating member 105 and the boss 20 of the stop unit 24 are correspondingly arranged.

[0185] When the wrench 4 is in the open position, the sliding unit 125 of the rotating member 105 and the guide unit 57 of the pushing member 52 cooperate one by one. Each limiting groove 107 of the rotating member 105 is aligned with the sliding groove 56 of its corresponding pushing member 52. Each boss 20 is partially placed in its corresponding sliding groove 56 and partially placed in its corresponding limiting groove 107.

[0186] During the process of the wrench 4 moving from the open position to the closed position, each sliding unit 125 of the rotating component 105 moves from its corresponding guide unit 57 to another guide unit 57 adjacent to its current guide unit 57. This other guide unit 57 is located to the right of its current guide unit 57 (within the range shown). Figure 10(For reference only). Specifically, when the wrench 4 is in the open position, each sliding unit 125 of the rotating member 105 is located at one of the guide units 57 and engages with that guide unit 57. During the movement of the wrench 4 from the open position to the closed position, each sliding unit 125 of the rotating member 105 moves to be partially located at one of the guide units 57 and partially located at the other guide unit 57. When the wrench 4 moves from the closed position to the open position, each sliding unit 125 of the rotating member 105 moves to be completely located at the other guide unit 57 and engages with that other guide unit 57.

[0187] refer to Figure 20 When the wrench 4 is in the open position, one of the bosses 20 is located in one of the limiting grooves 107 of the rotating member 105. When the wrench 4 moves from the closed position to the open position, the boss 20 is located in the other limiting groove 107 of the rotating member 105. "One of the limiting grooves 107" is located to the right of "the other limiting groove 107".

[0188] refer to Figure 14-15 The stop unit 24 also has multiple stop portions 49, and the rotating member 105 has multiple limiting portions 110 corresponding to the multiple stop portions 49. A clearance groove 111 is provided between two adjacent limiting portions 110. When the wrench 4 is in the open position, each limiting portion 110 of the rotating member 105 is aligned with one stop portion 49. When the wrench 4 is in the first intermediate position, each limiting portion 110 of the rotating member 105 abuts against one stop portion 49. When the wrench 4 moves from the first intermediate position to the second intermediate position, the rotating member 105 rotates, causing each clearance groove 111 of the rotating member 105 to align with one stop portion 49. When the wrench 4 moves from the second intermediate position to the closed position, each stop portion 49 moves within its aligned clearance groove 111.

[0189] refer to Figure 16 In order to make the drive of the wrench 4 on the push member 52 more stable, the wrench 4 is provided with a receiving cavity 18. In response to the forward movement of the wrench 4, the wrench 4 moves to the force-bearing end 53 of the push member 52 and enters the receiving cavity 18 and abuts against the inner wall of the receiving cavity 18, so that the wrench 4 drives the push member 52 to move in the first direction.

[0190] It should be noted that in the description of the limiting mechanism in this application, "the wrench is 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, causing it to move from the fully open position to its receiving cavity 18 abutting against the pusher 52, all positions of the wrench during this process, including the fully open position and the position abutting against the pusher 52, are considered the open positions of the wrench. When the wrench 4 is provided with a receiving cavity 18, abutting against the pusher 52 means that the receiving cavity 18 abuts against the pusher 52.

[0191] refer to Figure 8-9 To ensure a more stable fit between the pushing member 52 and the rotating member 105, the limiting mechanism also includes a pivot 119. The guide end 55 of the pushing member 52 has a second receiving groove 126; the pivot 119 is movably disposed in the second receiving groove 126, and one end of the pivot 119 is connected to the first end 106 of the rotating member 105, allowing the pushing member 52 and the rotating member 105 to be stably connected, and the pivot 119 to rotate within the second receiving groove 126, allowing the pushing member 52 and the rotating member 105 to rotate relative to each other.

[0192] refer to Figure 7 , Figure 12-15 To facilitate disassembly and installation, the stop unit 24 is configured as a split type in this embodiment. Specifically, the stop unit 24 includes a first sleeve 19 and a second sleeve 48 connected to each other, with the first sleeve 19 positioned above the second sleeve 48 (to...). Figure 7 (For reference only). A boss 20 is disposed in the first sleeve 19, and a stop 49 is disposed in the second sleeve 48. The outer wall of the first sleeve 19 is provided with a plurality of circumferentially arranged engaging blocks 47, and the second sleeve 48 is provided with a plurality of circumferentially arranged engaging parts 50. Each engaging part 50 has an engaging groove 51, and each engaging block 47 engages into its corresponding engaging groove 51, thereby connecting the first sleeve 19 and the second sleeve 48.

[0193] refer to Figure 7 , 12 -13, the upper end of the first sleeve 19 is the first end of the stop unit 24. The upper end of the first sleeve 19 is provided with a through hole. The force-receiving end 53 of the push member 52 passes through the through hole. The size of the through hole is adapted to the size of the force-receiving end 53 of the push member 52.

[0194] join Figure 10-11The pusher 52 is provided with multiple guide units 57, which are located on the outer wall of the pusher 52. When the pusher 52 moves in the second direction, the guide units 57 cannot pass through the through hole at the upper end of the first sleeve 19. The upper end face of the guide unit 57 will abut against the upper end of the first sleeve 19, so that the pusher 52 cannot detach from the first sleeve 19 through the through hole.

[0195] The following details the working process of the clamping pliers' transmission mechanism performing the clamping, clamping, and pushing actions when it has two intermediate positions:

[0196] 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.

[0197] 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 clamping block 42 of the clamping drive mechanism continues to abut against the clamp 22 from the rear end of the first clamp 22, keeping the clamp 22 in the jaw assembly 14.

[0198] 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, and anti-reverse mechanism is negligible.

[0199] 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 in the clamping chamber 6 forward by one position (the push clamping action is completed).

[0200] As described above, in response to the wrench 4 moving from the open position to the first intermediate position, the clamping drive mechanism drives the first clamp to move from the clamping chamber 6 into the jaw assembly 14. At the same time, multiple push clamping blocks 31 also move backward to the side of the clamp in the radial direction of the clamping chamber 6, and the two overlap radially in the clamping chamber 6. When the wrench 4 retracts from the first intermediate position to the second intermediate position, the push clamping blocks 31 are still located on the side of the clamp in the radial direction of the clamping chamber 6. In response to the wrench 4 moving from the second intermediate position to the closed position, multiple push clamping blocks 31 move proximally to the proximal side of the corresponding clamp 22. When the wrench 4 returns from the first intermediate position to the second intermediate position, the push clamping blocks 31 are still located on the side of the clamp in the radial direction of the clamping chamber 6. In response to the wrench 4 moving from the second intermediate position to the closed position, multiple push clamping blocks 31 move proximally to the proximal side of the corresponding clamp 22. In response to the movement of the wrench 4 from the closed position to the open position, multiple push clamping blocks 31 move forward to drive the corresponding clamps to move forward to the previous station, i.e. the adjacent far station. During this process, the clamps may rush forward a large distance due to inertia, which may easily cause the clamps in the clamping chamber to become disordered and affect the next clamping.

[0201] Please refer to Figure 25 and Figure 26 On the inner wall of the clamping chamber 6, a first stop part 601 is provided on the front side of the second clamp to the Nth clamp respectively. Each first stop part 601 can constrain the forward movement range of the second clamp to the Nth clamp during the process of the wrench 4 rebounding from the closed position to the open position, and play a stop role, thereby preventing the clamp 22 from rushing forward due to its own inertia, and thus avoiding the clamp from becoming disordered.

[0202] When the wrench 4 of the clamping pliers has two intermediate positions, the technical concept of this application can also be implemented, and a first stop 601 can be provided to prevent the clamp 22 from becoming disordered. Similarly, a second stop 602 can be further provided. In addition, when the wrench 4 of the clamping pliers has two intermediate positions, the specific construction of the first stop 601 and the second stop 602 is similar to that of the aforementioned embodiments, and will not be repeated here.

[0203] It should be noted that when the wrench has two intermediate positions, the wrench 4 only retracts slightly from the first intermediate position to the second intermediate position. Therefore, when the wrench is in the second intermediate position, the axial length of the overlapping area between the push clamp 31 and the clamp is only slightly greater than the axial length of the overlapping area between the push clamp 31 and the clamp when the wrench is in the first intermediate position. Preferably, the axial length of the overlapping area between the push clamp 31 and the clamp when the wrench is in the first intermediate position is set as S1, and the distance S2 between the first stop 601 and the clamp 22 should be less than or equal to S1. The slightly smaller distance S1 further ensures the effectiveness of the first stop 601.

[0204] 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.

[0205] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A clamping pliers, characterized in that, Includes jaw assembly, clamping chamber, handle assembly, clamp feeding drive mechanism, clamp pushing drive mechanism, and jaw drive mechanism; The clamping chamber includes a distal end and a proximal end arranged along the axial direction. The distal end is connected to the jaw assembly. The clamping chamber contains N clamps, where N is greater than or equal to 2. The N clamps include a first clamp, a second clamp, and an Nth clamp arranged sequentially at their respective workstations from the distal end to the proximal end. The inner wall of the clamping chamber is provided with a first stop portion on the front side of the second clamp to the Nth clamp respectively. The handle assembly includes a handle housing and a wrench movably connected to the handle housing, the wrench having an open position, a neutral position, and a closed position; The push-clamp drive mechanism includes a plurality of push-clamp blocks for abutting and pushing the second clamp to the Nth clamp forward. When the wrench is in the open position, the plurality of push-clamp blocks are respectively located on the front side of the second clamp to the Nth clamp. In response to the wrench moving from the open position to the intermediate position, the clamping drive mechanism drives the first clamp to move from the clamping chamber to the jaw assembly, and the plurality of the pushing clamp blocks move proximally. In response to the wrench moving from the 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. When the wrench is in the closed position, each of the push clamp blocks is located on the rear side of the second clamp to the Nth clamp. In response to the wrench moving from the closed position to the open position, the plurality of push clamps move to the distal side, such that the second clamp to the Nth clamp moves to the distal side after passing the first stop corresponding to the current station and stops behind the first stop corresponding to the previous station.

2. The clamping pliers according to claim 1, characterized in that, In response to the wrench moving from the open position to the intermediate position, the plurality of push clamp blocks respectively move backward to one side of the second to Nth clamps in the radial direction of the clamping chamber, and at least a portion of the push clamp blocks overlap with the clamps; In response to the wrench moving from the intermediate position to the closed position, the plurality of push clamp blocks move proximally to the rear side of the second clamp to the Nth clamp.

3. The clamping forceps according to claim 1, characterized in that, When the wrench is in the middle position, the axial length of the overlapping area between the push clamp block and the corresponding clamp is S1, and the distance between the first stop and the corresponding clamp is S2, where S2 is less than or equal to S1.

4. The clamping pliers according to claim 1, characterized in that, The first stop is a protrusion, a pit, or a friction area provided on the inner wall of the clamping chamber.

5. The clamping pliers according to claim 1, characterized in that, A second stop is also provided between the clamp and its corresponding first stop.

6. The clamping pliers according to claim 5, characterized in that, The first stop is a protrusion, a pit, or a friction area provided on the inner wall of the clamping chamber, and the second stop is a protrusion, a pit, or a friction area provided on the inner wall of the clamping chamber.

7. The clamping pliers according to claim 2, characterized in that, The push-clamp drive mechanism further includes a push-clamp seat, and the push-clamp block is rotatably connected to the push-clamp seat; in response to the wrench moving from the open position to the intermediate position, the push-clamp seat moves proximally, thereby causing the push-clamp block to move proximally and abut against the corresponding clamp and deflect, thereby moving the push-clamp block to one side of the clamp in the radial direction of the clamping chamber and overlapping with it; In response to the wrench moving from the intermediate position to the closed position, the push clamp seat continues to move proximally, thereby causing the push clamp block to continue moving proximally to the rear side of the corresponding clamp.

8. The clamping pliers according to claim 7, characterized in that, The push-clamp drive mechanism further includes a fourth reset member. In response to the wrench moving from the open position to the closed position, the push-clamp seat moves proximally, causing the fourth reset member to store energy and release the wrench. The fourth reset member applies a biasing force, causing the push-clamp seat to move distally to drive the second clamp until the Nth clamp moves forward one position after passing the corresponding first stop. The resistance of the first stop to the clamp is less than the biasing force applied by the fourth reset member to the push-clamp seat.

9. The clamping pliers according to claim 8, characterized in that, The clamping pliers include a mating mechanism, which includes an upper rack, a gear, and a lower rack; the upper rack drives the lower rack through the gear; the push clamp is connected to the distal end of the lower rack, one end of the fourth reset member is connected to the proximal end of the lower rack, and the other end of the fourth reset member is connected to the handle housing; In response to the movement of the wrench, the upper rack moves, causing the lower rack to drive the push clamp to move in the opposite direction to the movement of the upper rack.

10. The clamping pliers according to claim 9, characterized in that, The clamp feeding drive mechanism includes a clamp feeding assembly and a clamp feeding drive tube connected to each other. In response to the wrench moving from the open position to the intermediate position, the clamp feeding drive tube moves to the distal end to drive the clamp feeding assembly to move to the distal end, thereby driving the clamp feeding assembly to push the clamp in the clamping chamber into the jaw assembly.

11. The clamping pliers according to claim 10, characterized in that, The feed drive tube is drivably connected to the upper rack, and in response to the movement of the feed drive tube, the upper rack moves in the same direction.

12. The clamping pliers according to claim 1, characterized in that, The jaw drive mechanism includes a sleeve that moves distally along the axial direction to close the jaw assembly.

13. The clamping pliers according to claim 1, characterized in that, The intermediate position includes a first intermediate position and a second intermediate position; In response to the wrench moving from the open position to the first intermediate position, the clamp feeding drive mechanism drives the clamp to move from the clamping chamber into the jaw assembly; 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; The clamp also includes a limiting mechanism, which is configured to: limit the wrench to a first intermediate position during the process of the wrench moving from the open position to the closed position under the action of an external force, and to move the wrench from the first intermediate position to the second intermediate position in the opposite direction after the external force is removed.

14. The clamping pliers according to claim 13, characterized in that, In response to the wrench moving from the open position to the first intermediate position, the plurality of push clamp blocks move proximally to one side of the second to Nth clamps in the radial direction of the clamping chamber; In response to the wrench moving from the second intermediate position to the closed position, the plurality of push clamp blocks move proximally to the rear side of the second clamp to the Nth clamp.

15. The clamping pliers according to claim 13, characterized in that, The limiting mechanism includes: A stop unit is disposed in the handle housing, and the stop unit has a stop portion; A contact unit, which is movably connected to the stop unit, the contact unit having a limiting part and a clearance groove; When the wrench is in the open position, in response to applying force to the wrench, the wrench moves forward and drives the abutting unit to move until its limiting part abuts against the stop part, so that the wrench stops at the first intermediate position; When the wrench is in the first intermediate position, in response to the cancellation of the force applied to the wrench, the wrench moves in the opposite direction to the second intermediate position, and the abutting unit moves until its limiting part disengages from the stop part and its relief groove aligns with the stop part; 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 unit to move until the wrench reaches the closed position, so that the stop portion moves relative to the clearance groove and thus causes the stop portion to enter the clearance groove of the abutment unit.

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