Clip Applier

Abstract

The present disclosure provides a clamping forceps, including a jaw assembly, a clamping magazine, a housing, a wrench and a transmission mechanism, wherein the transmission mechanism includes a clamp feeding drive mechanism and a jaw drive mechanism; the clamping magazine has a clamp; the wrench is movably connected to the housing; the clamping forceps also include a counting drive mechanism, a counting mechanism and a clutch drive mechanism. The counting mechanism includes an actuating part and an indicating part, and the counting drive mechanism includes a first driving part and a second driving part; when the wrench moves forward from the open position, the first driving part drives the actuating part to move along the first counting direction to change the counting value of the indicating part; after the counting value of the indicating part changes and the wrench continues to move forward, the clutch driving part drives the first driving part to move to disengage from the actuating part through the second driving part. The present disclosure improves the accuracy of clamp counting.

Description

Technical Field

[0001] The present disclosure relates to a clip applier. Background Art

[0002] In human surgical operations, such as abdominal surgery, clip applicators are often used to apply clips to tissues or blood vessels. The clip has two clamp arms that can be closed to fix the target tissue or blood vessel between the two clamp arms, thereby achieving the function of hemostasis and ligation closure. Continuous clip applicators can apply multiple clips continuously, which is more convenient to use and has become a trend in recent years.

[0003] A continuous clip applicator in the related art includes a jaw assembly, a wrench, a clamp magazine, a clamp feeding drive mechanism, a jaw drive mechanism, and a clamp pushing drive mechanism. The clamp magazine has a clamp. The wrench has an open position, an intermediate position, and a closed position. A user presses the wrench to move the wrench from the open position to the intermediate position, and then to the closed position.

[0004] In order to apply multiple clips continuously, the clamp applicator needs to perform three actions: the clip delivery action, the jaw closing action (clamp application action) and the clamp pushing action. When the wrench moves from the open position to the middle position, the clip delivery drive mechanism delivers the front-end clip in the clip compartment to the preparation position in the jaw assembly (clip delivery action). At this time, the clamp applicator is in the clip delivery completion state, and the user can adjust the angle of the jaw assembly so that the clip can be aligned with the target tissue or blood vessel. Then the user continues to press the wrench to move the wrench from the middle position to the closed position to close the jaw assembly (clamp application action), so that the clip in the jaw assembly is closed and applied to the target tissue or blood vessel. When the wrench is released, the wrench will move from the closed position to the open position, and the clamp pushing drive mechanism drives the other clips in the clip compartment to move forward one station (clamp pushing action). Summary of the invention

[0005] An object of the present disclosure is to provide a clip applier.

[0006] The present disclosure provides a clamping forceps, comprising a jaw assembly, a clamping magazine, a housing, a wrench and a transmission mechanism, wherein the transmission mechanism comprises a clamp feeding drive mechanism and a jaw drive mechanism; the clamping magazine has a clamp; the wrench is movably connected to the housing, and the wrench has an open position, an intermediate position and a closed position, and the movement path of the wrench from the open position via the intermediate position to the closed position is a closed path;

[0007] In response to the wrench moving from the open position to the intermediate position, the clamp feeding drive mechanism drives the clamp to move from the clamp magazine to the jaw assembly; 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 clamp in the jaw assembly is closed;

[0008] Wherein, the clamp applier further comprises a counting drive mechanism, a counting mechanism and a clutch drive unit, the counting mechanism comprises an actuating unit and an indicating unit, the counting drive mechanism comprises a first drive unit and a second drive unit connected to the first drive unit;

[0009] When the wrench moves forward along the closed path, the first driving part drives the actuating part to engage with the actuating part to move along a first counting direction to change the count value of the indicating part; the count value indicates the number of remaining clips in the clip compartment or the number of clips that have been used;

[0010] After the count value of the indicating part changes and the wrench continues to move in the forward direction, the clutch driving part drives the first driving part to move and disengage from the actuating part through the second driving part.

[0011] In some embodiments, when the wrench moves from the open position to the intermediate position, the first driving part drives the actuating part to move along the first counting direction to change the counting value of the indicating part;

[0012] When the wrench moves from the intermediate position to the closed position, the clutch driving portion drives the first driving portion to move and disengage from the actuating portion through the second driving portion.

[0013] In some embodiments, a counting position is further included between the intermediate position and the closed position, and when the wrench moves from the intermediate position to the counting position, the first driving part drives the actuating part to move along the first counting direction to change the counting value of the indicating part;

[0014] When the wrench moves from the counting position to the closing position, the clutch driving portion drives the first driving portion to move and disengage from the actuating portion through the second driving portion.

[0015] In some embodiments, the counting drive mechanism is fixedly connected to or integrally formed with the transmission mechanism. When the wrench moves forward, the transmission mechanism is driven by the wrench and synchronously drives the counting drive mechanism to move along the first direction.

[0016] In some embodiments, the counting drive mechanism includes an elastic arm, the elastic arm is fixedly connected to or integrally formed with the transmission mechanism, and the first drive part and the second drive part are both arranged on the elastic arm;

[0017] In response to the clutch driving part driving the second driving part, the elastic arm is deformed by the force, so that the first driving part moves to be separated from the actuating part.

[0018] In some embodiments, the first end of the elastic arm is fixedly connected to or integrally formed with the transmission mechanism, the second end of the elastic arm is a free end, and the second end of the elastic arm extends along a second direction relative to the first end of the elastic arm; the second direction is opposite to the first direction; the first driving part and the second driving part are arranged at the second end;

[0019] After the count value of the indicating part changes and the wrench continues to move forward, the clutch driving part drives the second driving part to rotate the second end of the elastic arm relative to the first end, thereby separating the first driving part from the actuating part.

[0020] In some embodiments, a bending portion is provided at the second end of the elastic arm, and the top of the bending portion is bent and protruded toward the counting mechanism. The first driving portion is provided at the top of the bending portion, and the second driving portion is provided at the top of the bending portion on one side close to the first end of the elastic arm.

[0021] In some embodiments, the second driving portion includes a guide slope, the height of the guide slope gradually decreases along the first direction, and there is a gap between the guide slope and the counting mechanism;

[0022] In response to the wrench moving forward along the closed path, the counting drive mechanism moves along the first direction, and the first driving part engages with the actuating part to drive the actuating part to move along the first counting direction to change the counting value of the indicating part; after the counting value of the indicating part changes and the wrench continues to move forward, the clutch driving part slides and abuts against the guide slope, so that the second end of the elastic arm moves, thereby disengaging the first driving part from the actuating part.

[0023] In some embodiments, the transmission mechanism includes a seat body, the seat body is operably abutted against the wrench to be driven by the wrench in forward motion, and the first end of the elastic arm is fixedly connected to or integrally formed with the seat body;

[0024] In response to the wrench moving forward along the closed path, the seat body moves along the first direction, thereby driving the elastic arm to move along the first direction.

[0025] In some embodiments, the counting drive mechanism includes an elastic arm, and the elastic arm is fixed to the transmission mechanism.

[0026] In some embodiments, the second driving portion includes a guiding slope, the height of which gradually decreases along the first direction, and after the count value of the indicating portion changes and the wrench continues to move forward, the guiding slope moves along the first direction, and the clutch driving portion acts on the guiding slope to move the second driving portion, thereby causing the first driving portion to move to disengage from the actuating portion.

[0027] In some embodiments, the clutch driving portion is provided on the inner side of the shell, and the clutch driving portion is a protrusion extending toward the counting driving mechanism.

[0028] In some embodiments, the shell also includes a stop mechanism, and the counting mechanism also includes a stop part. When the counting drive mechanism moves along the second direction, the stop mechanism cooperates with the stop part to block the actuator from moving along the second counting direction; the second direction is opposite to the first direction, and the first counting direction is opposite to the second counting direction.

[0029] In some embodiments, one of the stopper and the stopper mechanism comprises a plurality of stopper teeth, and the other is provided with a matching portion, wherein the stopper teeth comprise a guide surface and a stopper surface;

[0030] When the counting drive mechanism moves along the first direction and the first driving part drives the actuating part to move along the first counting direction, the matching part slides along the guide surface of the stop tooth to allow the counting mechanism to move along the first counting direction;

[0031] When the counting drive mechanism moves along the second direction, the matching portion matches with the stop surface of the stop tooth to block the counting mechanism from moving along the second counting direction.

[0032] In some embodiments, the first counting direction is a first rotation direction, the stop mechanism is provided with a mounting groove, the inner wall of the mounting groove is provided with a plurality of stop teeth arranged along a circumferential direction, the stop portion includes a mating portion protruding outward, the stop portion is located on the inner side of the mounting groove, and the mating portion is engaged with the stop tooth to prevent the actuator from moving along the second counting direction.

[0033] In some embodiments, the clamp delivery drive mechanism includes a clamp delivery rod. In response to the wrench moving forward from the open position to the middle position, the clamp delivery rod moves distally, and the clamp delivery rod pushes the clamp, thereby causing the clamp to move from the clamp magazine to the jaw assembly.

[0034] In some embodiments, the jaw drive mechanism includes a sleeve. In response to the wrench moving from the intermediate position to the closed position, the sleeve moves distally and the jaw assembly is at least partially accommodated in the sleeve, thereby driving the jaw assembly to close. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the clip applier provided in an embodiment of the present disclosure.

[0036] Figure 2A-2B It is a schematic diagram of the structure of the clamping bin provided in an embodiment of the present disclosure.

[0037] Figure 3 It is a schematic diagram of the structure of the clip provided in the embodiment of the present disclosure.

[0038] Figure 4 is a partial cross-sectional view of the clip applier provided in an embodiment of the present disclosure, wherein the jaw assembly is in an open state.

[0039] Figure 4A for Figure 4 Schematic diagram of the structure of the switching mechanism.

[0040] Figure 4B for Figure 4 Schematic diagram of the structure of the matching mechanism.

[0041] Figure 5A The partial area of ​​the clip applier provided by the embodiment of the present disclosure is Figure 5B Schematic diagram of the cross-sectional structure from the MM perspective, in which the clamp feeding assembly does not abut against the clamp.

[0042] Figure 5B The partial area of ​​the clip applier provided by the embodiment of the present disclosure is Figure 5A Schematic diagram of the cross-sectional structure from the LL perspective, in which the clamp feeding assembly does not abut against the clamp.

[0043] Fig. 6A The partial area of ​​the clip applier provided by the embodiment of the present disclosure is Figure 6B A schematic diagram of the cross-sectional structure from the MM perspective, in which the clamp feeding assembly abuts against the clamp and pushes the clamp into the jaw assembly.

[0044] Figure 6B The partial area of ​​the clip applier provided by the embodiment of the present disclosure is Fig. 6A Schematic diagram of the cross-sectional structure from the LL perspective, in which the clamp feeding assembly abuts against the clamp and pushes the clamp into the jaw assembly.

[0045] Figure 6C The partial area of ​​the clip applier provided by the embodiment of the present disclosure is Fig.6D Schematic diagram of the cross-sectional structure from the MM perspective, with the jaw assembly closed.

[0046] Fig.6D The partial area of ​​the clip applier provided by the embodiment of the present disclosure is Figure 6C Schematic diagram of the cross-sectional structure from the LL perspective, with the jaw assembly closed.

[0047] Fig. 6E It is a schematic diagram of the cooperation between the clamping block, the elastic rod and the clamp provided in the embodiment of the present disclosure.

[0048] Figure 7 It is a schematic structural diagram of the first head shell provided in an embodiment of the present disclosure.

[0049] Figure 8 It is a schematic structural diagram of the second head shell provided in an embodiment of the present disclosure.

[0050] Fig. 9 It is a schematic diagram of the structure of the counting mechanism provided in the embodiment of the present disclosure.

[0051] Fig.10 It is a schematic structural diagram from another angle of the counting mechanism provided in an embodiment of the present disclosure.

[0052] Fig.11 It is a structural schematic diagram of the clutch mechanism provided in an embodiment of the present disclosure.

[0053] Fig.12 It is a schematic diagram of the structure of the guide pivot member provided in an embodiment of the present disclosure.

[0054] Fig.13 It is a schematic diagram of the structure of the guide pivot member provided at another angle according to an embodiment of the present disclosure.

[0055] Fig.14 It is a schematic diagram of the structure of the wrench provided in the embodiment of the present disclosure.

[0056] Fig.15 It is a schematic diagram of the structure of the guide channel provided in an embodiment of the present disclosure.

[0057] Fig.16 is a schematic structural diagram of the clamp provided in an embodiment of the present disclosure, wherein the wrench is in an open position and a portion of the housing of the clamp is removed.

[0058] Fig.17 It is a front view of the cooperation between the counting mechanism and the clutch mechanism when the wrench is in the open position provided by the embodiment of the present disclosure.

[0059] Fig.18 It is a schematic diagram of the cooperation between the counting mechanism and the clutch mechanism when the wrench is in the open position provided by the embodiment of the present disclosure.

[0060] Fig.19It is a schematic diagram of the cooperation between the first head shell, the seat body and the counting drive mechanism when the wrench is in the open position provided by an embodiment of the present disclosure.

[0061] Fig. 20 is a partial cross-sectional view of the clip applier provided in an embodiment of the present disclosure, wherein the wrench is in a middle position.

[0062] Fig.21 2 is a schematic diagram of the structure of the clamp provided by an embodiment of the present disclosure, wherein the wrench is in a middle position and part of the housing of the clamp is removed.

[0063] Fig. 22 It is a front view of the cooperation between the counting mechanism and the clutch mechanism when the wrench is in the middle position provided by the embodiment of the present disclosure.

[0064] Fig.23 It is a schematic diagram of the cooperation between the counting mechanism and the clutch mechanism when the wrench is in the middle position provided by the embodiment of the present disclosure.

[0065] Fig.24 is a partial cross-sectional view of a clip applier provided in accordance with an embodiment of the present disclosure, wherein the wrench is in a closed position.

[0066] Fig.25 is a schematic structural diagram of the clamp provided in an embodiment of the present disclosure, wherein the wrench is in a closed position and a portion of the housing of the clamp is removed.

[0067] Fig.26 It is a front view of the cooperation between the counting mechanism and the clutch mechanism during the process of the wrench moving from the middle position to the counting position provided by the embodiment of the present disclosure.

[0068] Fig. 27 It is a schematic diagram of the cooperation between the counting mechanism and the clutch mechanism during the process of the wrench moving from the middle position to the counting position provided by an embodiment of the present disclosure.

[0069] Fig.28 It is a schematic diagram of the cooperation between the first head shell, the seat body and the counting drive mechanism when the wrench moves from the middle position to the counting position provided by an embodiment of the present disclosure.

[0070] Fig.29 It is a schematic diagram of the first head shell and the seat body matching after the wrench reaches the counting position provided by the embodiment of the present disclosure.

[0071] Fig.30 It is a schematic diagram of the first head shell and the seat body matching after the wrench reaches the counting position provided by the embodiment of the present disclosure.

[0072] Reference numerals:

[0073] 1-operating assembly; 2-head housing; 3-handle housing; 4-wrench; 5-shaft assembly; 6-clip compartment; 7-bottom; 8-first side; 9-second side; 10-inlet; 11-first transverse barb; 12-second transverse barb; 13-inclined end; 14-jaw assembly; 15-first clamp arm; 16-second clamp arm;

[0074] 201-first head shell; 202-second head shell; 203-first mounting portion; 204-clutch drive portion; 205-second mounting portion; 206-stop mechanism; 207-mounting groove; 208-stop tooth; 209-guide surface; 210-stop surface;

[0075] 22-clip; 23-first clamp arm; 25-first ear; 26-connecting portion; 27-second clamp arm; 29-second ear;

[0076] 30-clamping part; 31-pushing block; 32-jaw driving tube; 33-convex rib; 34-baffle; 35-sleeve; 36-first reset member; 37-base; 38-guide groove; 39-guide surface;

[0077] 40-clip delivery rod; 41-elastic rod; 42-clip delivery block; 43-clip delivery driving tube; 44-groove; 45-third reset member; 46-clip push seat;

[0078] 50-counting drive mechanism; 51-fixing part; 52-first drive part; 53-second drive part; 54-elastic connecting part; 55-bending part;

[0079] 62-base; 621-first connecting portion; 622-second connecting portion; 623-extension portion; 624-matching hole mechanism; 63-first clutch member; 64-second clutch member; 65-guide column; 66-first guide surface; 67-second guide surface; 68-fourth reset member; 69-upper rack;

[0080] 70-lower rack; 71-middle member; 72-spring; 73-guide pivot member; 74-bias spring; 75-guide member; 76-pivot portion; 77-force receiving portion; 78-guide portion; 79-retraction stop portion;

[0081] 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; 89-secondary channel;

[0082] 90 - counting mechanism; 91 - indicating part; 92 - ratchet; 93 - mounting hole; 94 - stopper; 95 - rod; 96 - matching part; 97 - retaining wall. DETAILED DESCRIPTION

[0083] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present disclosure.

[0084] It should be understood that the terms "proximal", "rear", "distal", and "front" used herein are relative to the clinician who manipulates the handle of the clip applier. The terms "proximal" and "rear" refer to the portion close to the clinician, and the terms "distal" and "front" refer to the portion away 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 close to the handle assembly, and the distal end refers to the end relatively close to the jaw assembly.

[0085] In the present disclosure, unless otherwise clearly specified and limited, the terms such as "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movably connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements such as abutment. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. It should be noted that when there is a qualifier before "connected" or "connection", it has the meaning defined by the corresponding qualifier, and only excludes situations that obviously need to be excluded, and does not exclude other possible situations.

[0086] In order to observe the number of remaining clips during the use of the clip applier, a counting mechanism may be provided in the clip applier housing, and when the wrench moves forward, the counting mechanism is driven by the counting drive mechanism to change the count value. However, during one movement stroke of the wrench, the counting drive mechanism may continue to overdrive the counting mechanism, causing the counting mechanism to count repeatedly, so that the indicated count value of the counting mechanism cannot accurately indicate the number of clips.

[0087] In order to solve the technical problems in the prior art, the present disclosure aims to provide a simple and stable clip applier, which effectively avoids repeated counting of a counting mechanism within a spanner movement stroke, and effectively improves the counting accuracy of the counting mechanism for clips. In the present disclosure, the counting mechanism is used to count the remaining clips in the clip compartment, or to count the number of clips that have been applied.

[0088] The technical concept of the present disclosure in a specific embodiment is described in detail below with reference to the accompanying drawings.

[0089] The term "axial direction" as used herein refers to the length direction of the sleeve. A "wrench movement stroke" referred to herein refers to the process in which the wrench moves from an open position through an intermediate position to a closed position during a clip delivery and clip application process, and a clip is pushed out from the clip compartment to the jaw assembly and applied to the tissue. The "first direction" herein refers to the direction from the proximal end of the clip applicator to the distal end, and the "second direction" refers to the direction from the distal end of the clip applicator to the proximal end.

[0090] Please refer to Figures 1 to 4 ,in, Figure 1 It is a schematic diagram of the structure of the clip applier provided in an embodiment of the present disclosure. Figure 2A-2B 2 is a schematic diagram of the structure of the clamping bin provided in the embodiment of the present disclosure. The clamping bin 6 contains a plurality of clamps 22 . Figure 3 A schematic diagram of the structure of a clip provided in an embodiment of the present disclosure. Figure 4 is a partial cross-sectional view of the clip applier provided in an embodiment of the present disclosure, wherein the jaw assembly is in an open state.

[0091] refer to Figure 1 The present embodiment provides a clip applicator, for example, a continuous clip applicator, for applying a clip 22 to a tissue or a blood vessel. According to the overall positional relationship, the clip applicator includes an operating assembly 1, a shaft assembly 5 extending from the operating assembly 1, a transmission mechanism, a clip chamber 6, and a jaw assembly 14 disposed at the distal end of the shaft assembly 5.

[0092] The operating assembly 1 includes a main body and a wrench 4. The main body includes a shell, and the wrench 4 is movably connected to the shell. The shell is divided into a head shell 2 and a handle shell 3 extending from the lower side of the head shell 2 according to the position relationship, and the handle shell 3 and the wrench 4 constitute a handle assembly. The user can grasp the handle shell 3 with one hand, pull or press the wrench 4 with a finger, so that the wrench 4 moves relative to the main body, thereby driving the transmission mechanism to move along the first direction.

[0093] In this embodiment, the wrench 4 has a forward motion and a reverse motion, and the direction of the forward motion is opposite to the direction of the reverse motion. Figure 1 The position of the wrench 4 shown), the middle position (as Fig.21 The position of the wrench 4 shown) and the closed position (as shown Fig.25 The movement path of the wrench from the open position to the middle position to the closed position is the closed path. After the wrench 4 moves forward from the open position under the action of external force, the free end of the wrench 4 can stay in the middle position close to the handle housing 3. If the wrench 4 is pressed continuously, the wrench 4 moves forward from the middle position to the closed position. When the wrench 4 is in the closed position, after the wrench 4 is released, the wrench 4 moves in the reverse direction from the closed position to the open position.

[0094] Please refer to Figure 1 , Figure 2A-2B The clip compartment 6 is disposed on the shaft assembly 5. The proximal end of the clip compartment 6 is connected to the main body of the operating assembly 1, and the distal end of the clip compartment 6 is connected to the jaw assembly 14. Before clipping, the clip 22 is placed in the clip compartment 6. Figure 2A , a plurality of clips 22 are placed in the clip compartment 6, and the plurality of clips 22 are arranged in sequence from the distal end to the proximal end of the clip compartment 6, namely the first clip, the second clip to the Nth clip. The first clip is closest to the distal end of the clip compartment 6 and is first fed into the jaw assembly 14. The clips 22 other than the first clip in the clip compartment 6 are defined as other clips. The clip compartment 6 includes M workstations, which are arranged from the distal end to the proximal end of the clip compartment 6, namely the first workstation, the second workstation, ... the Mth workstation, the first clip is located at the first workstation at the front end, and the second to the Nth clips are arranged in the second to the Nth workstations in the corresponding order. M≥2, M≥N.

[0095] Please refer to Figure 3 The clip 22 includes a first clamp arm 23, a second clamp arm 27, and a connecting portion 26 located between the first clamp arm 23 and the second clamp arm 27. The connecting portion 26 is flexible so that the first clamp arm 23 and the second clamp arm 27 can pivot relative to each other. One end of the first clamp arm 23 is connected to the connecting portion 26, and the other end is provided with two first ears 25, one first ear 25 is provided on one side of the first clamp arm 23, and the other first ear 25 is provided on the other side opposite to the first clamp arm 23. One end of the second clamp arm 27 is connected to the connecting portion 26, and the other end is provided with a clamping portion 30, for example, the clamping portion 30 is a curved C-shaped hook. The second clamp arm 27 is provided with two second ears 29 near the clamping portion 30, one second ear 29 is provided on one side of the second clamp arm 27, and the other second ear 29 is provided on the other side opposite to the second clamp arm 27.

[0096] The size of the clamping part 30 is larger than the distance between the two first ears 25, and the two first ears 25 have a certain elasticity and can be deformed. Therefore, under the drive of external force, the first clamping arm 23 and the second clamping arm 27 approach each other, so that the clamping part 30 moves between the two first ears 25, and the two first ears 25 are deformed under the action of the clamping part 30, so that the clamping part 30 is clamped between the two first ears 25, so that the first clamping arm 23 and the second clamping arm 27 are fully clamped, so that the blood vessel or tissue placed between the first clamping arm 23 and the second clamping arm 27 can be effectively clamped and hemostasis can be achieved.

[0097] refer to Figure 2A-2BThe clip compartment 6 includes a bottom portion 7 extending in the axial direction and a first side portion 8 and a second side portion 9 opposite to each other. When the clip 22 is installed in the clip compartment 6, the clip 22 is compressed due to the size and internal space of the clip compartment 6. Specifically, the first clamp arm 23 of the clip 22 abuts against the first side portion 8, and the second clamp arm 27 abuts against the second side portion 9, so that the two clamp arms 23, 27 are compressed but not compressed to a closed state, that is, the two clamp arms 23, 27 of the clip 22 are close to each other but not engaged.

[0098] The bottom 7 of the clamping bin 6 is formed with a plurality of abutment components along its length, and one abutment component is provided at each station. Figure 2A Each abutting assembly includes a first transverse barb 11 and a second transverse barb 12. The first transverse barb 11 is in a row, and the second transverse barb 12 is in a row. The first transverse barb 11 and the second transverse barb 12 are arranged in two rows on the bottom 7. The first transverse barb 11 is arranged close to the first side portion 8, and the second transverse barb 12 is arranged close to the second side portion 9. The transverse barbs on each row are arranged at equal intervals along the axial direction, for example. Each transverse barb is inclined from the bottom 7 of the clamping chamber 6 toward the distal end of the clamping chamber 6 and toward the inside of the clamping chamber 6, that is, the proximal end of each transverse barb is connected to the bottom 7, and the distal end is movable. In this embodiment, the transverse barb is, for example, an elastic sheet with a raised distal end. The distal end of each transverse barb is an inclined terminal 13.

[0099] Combination Figure 2A , Figure 2B and Figure 3 When the first transverse barb 11 of each abutting assembly abuts against a first ear 25 of the clip 22 from behind the first ear 25, the second transverse barb 12 abuts against a second ear 29 of the same clip 22 from behind the second ear 29. Specifically, when the inclined end 13 of the first transverse barb 11 clamps a first ear 25, the inclined end 13 of the second transverse barb 12 clamps the second ear 29 on the same side as the first ear 25. Thus, each abutting assembly can prevent the clip 22 from entering the adjacent proximal station from the current station in the clip compartment 6.

[0100] When the clip 22 moves forward along the axial direction, the clip 22 slides and contacts the transverse barb in front to press the transverse barb toward the bottom 7, so that the clip 22 can smoothly pass through the transverse barb, so that the clip 22 can enter the adjacent distal station from the current station. Specifically, when the clip 22 moves forward along the axial direction, the first clamp arm 23 of the clip 22 slides through the first transverse barb 11 in front of it, and at the same time, the second clamp arm 27 of the clip 22 slides through the second transverse barb 12 in front of it, so that the first transverse barb 11 and the second transverse barb 12 are bent toward the bottom 7, so that the clip 22 smoothly passes through the first transverse barb 11 and the second transverse barb 12 to enter the adjacent distal station.

[0101] To continuously apply multiple clips 22, the clip applier needs to perform three actions: a clip delivery action performed by the clip delivery drive mechanism, a jaw closing action (clamp application action) performed by the jaw drive mechanism, and a clamp pushing action performed by the clip pushing drive mechanism.

[0102] Combined with reference Figure 1 and Figure 4 The transmission mechanism includes a clip 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 intermediate position, the clip delivery drive mechanism drives the first clamp to move from the clamp chamber 6 to 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 so that the clamp 22 in the jaw assembly is closed and the clamp 22 is applied to the tissue or blood vessel. Figure 5B As shown, when the wrench 4 is in the closed position, the clamping blocks 31 of each clamping driving mechanism are respectively located at the rear side of the second clamp to the Nth clamp. In response to the wrench 4 moving from the closed position to the open position, the plurality of clamping blocks 31 move forward to respectively drive the second clamp to the Nth clamp to move forward one station.

[0103] The clamp can apply clamps continuously, that is, by pressing the wrench 4 multiple times, multiple clamps 22 in the clamp compartment 6 can be applied to the tissue or blood vessel in sequence. Figure 4 As shown, in order to indicate the number of clips 22, the clip applicator also includes a counting mechanism 90 and a counting drive mechanism 50. The counting mechanism 90 is used to indicate the number of remaining clips 22 in the clip compartment, or to indicate the number of clips 22 that have been applied. The counting mechanism 90 includes an actuating portion and an indicating portion. The counting drive mechanism 50 is provided with a first driving portion. When the wrench 4 moves forward from the open position, the counting drive mechanism 50 moves along the first direction until the first driving portion engages with the actuating portion, and the first driving portion drives the actuating portion to move along the first counting direction to change the count value of the indicating portion. The head shell 2 is provided with an observation window, which is opposite to the indicating portion, and the display content of an indicating area opposite to the indicating portion can be observed through the observation window. The indicating portion is provided with a plurality of indicating marks to indicate the number of remaining clips. When the indicating portion is driven to move along the first counting direction, the indicating portion switches different indicating marks to the indicating area. The indicating mark can be, for example, a number, a specified text, a specified symbol, a specified color, a specified graphic or other types of marks.

[0104] Here, changing the count value of the indicator part is specifically manifested as changing the indicator mark in the indicator area of ​​the indicator part observed from the observation window of the head shell 2. For the doctor, the indicator mark observed from the observation window represents the current count value. The movement of the actuator along the first counting direction will drive the indicator part to move along the first counting direction, so that the different indicator marks of the indicator part move to the position of the mark area relative to the observation window. For example, when the indicator mark includes multiple consecutive numbers, each time the clamp applies a clip, the indicator part moves along the first counting direction so that the number that is increased or decreased than the number in the current indication area moves to the position of the indication area relative to the observation window. The doctor can see the count value after increasing or decreasing.

[0105] When the count value of the indicator has changed but the current movement stroke of the wrench 4 has not yet ended (the wrench 4 has not yet reached the closed position), the wrench 4 is continued to be pressed, and the wrench 4 continues to move forward. In order to prevent the actuator from excessively moving during the continued forward movement of the wrench 4 and causing the indicator to repeat counting, the clamping forceps are also provided with a clutch drive unit, and the counting drive mechanism 50 is also provided with a second drive unit, and the second drive unit is connected to the first drive unit. After the count value of the indicator changes and the wrench continues to move forward, the clutch drive unit cooperates with the second drive unit, and the second drive unit drives the first drive unit to move to be separated from the actuator unit, and the first drive unit will not continue to act on the actuator unit, which also prevents the first drive unit from continuing to drive the actuator unit to move along the first counting direction, thereby ensuring that only one count is made in a wrench movement stroke, thereby improving the accuracy of the counting mechanism in counting the number of clips.

[0106] It should be noted that the descriptions of the specific structures of the clamp feeding drive mechanism, the jaw drive mechanism, the clamp pushing drive mechanism, the counting mechanism, the counting drive mechanism and the specific structures of the clutch drive unit in the following embodiments are merely exemplary and are intended to be used to explain the present disclosure, and should not be construed as a limitation on the present disclosure.

[0107] The clip delivery drive mechanism is used to drive the clip 22 into the jaw assembly 14 (clip delivery action), the jaw drive mechanism is used to drive the jaw assembly 14 to move, and the clamp push drive mechanism is used to drive other clips in the clamping chamber 6 to move forward one station (clamp push action). The counting drive mechanism 50 is used to drive the counting mechanism 90 to change the count value of the indicating part, and the clutch drive part is used to drive the counting drive mechanism 50 to disengage from the counting mechanism 90 when the counting mechanism 90 changes the count value and the front wrench continues to move forward to avoid repeated counting by the counting mechanism 90. The wrench 4 drives the transmission mechanism to move, thereby driving the clip delivery drive mechanism, the jaw drive mechanism to move and the clamp push drive mechanism, so that the clip delivery drive mechanism performs the clip delivery action, the jaw drive mechanism performs the jaw closing action (clamping action), and the clamp push drive mechanism performs the clamp push action. And when the wrench 4 drives the transmission mechanism to move in the first direction, the counting drive mechanism 50 moves synchronously in the first direction.

[0108] refer to Figure 4 The jaw drive mechanism includes a jaw drive tube 32 and a sleeve 35. The jaw drive tube 32 is accommodated in the head shell 2. The sleeve 35 is sleeved on the outside of the clamping chamber 6, and the sleeve 35 also constitutes the shaft assembly 5 (marked at Figure 1 The proximal end of the sleeve 35 is connected to the jaw drive tube 32, and the distal end of the sleeve 35 cooperates with the jaw assembly 14. In response to the wrench 4 moving forward from the middle position to the closed position, the jaw drive tube 32 moves distally to drive the sleeve 35 to move distally, thereby driving the jaw assembly 14 (marked at Figure 1 )closure.

[0109] The jaw drive mechanism further includes a first reset member 36. The first reset member 36 is disposed in the head housing 2 of the clip applier 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 moves forward, and the first reset member 36 restores the deformation and releases the energy to provide power for the jaw drive mechanism to reset and retreat. For example, the first reset member 36 is a spring.

[0110] like Figure 5A As shown, the jaw assembly includes a first jaw arm 15 and a second jaw arm 16 which are respectively pivotally connected to the distal end of the clamping chamber 6. A second reset member is provided between the first jaw arm 15 and the second jaw arm 16 for opening the jaws, for example, the second reset member is a spring. Figure 4 and Figure 5B As shown, when the jaw drive tube 32 drives the sleeve 35 to move toward the distal end, the jaw assembly can be at least partially received in the sleeve 35 from the distal end of the sleeve 35 so that the jaw assembly is closed, and at this time, the second reset member between the two clamp arms 15 and 16 is compressed, and the first reset member 36 is also compressed. After the clamping is completed, under the action of the first reset member 36, the sleeve 35 moves toward the proximal end, the jaw assembly can extend from the distal end of the sleeve 35, and the second reset member releases energy to open the jaw assembly.

[0111] refer to Figure 5A-5B The shaft assembly 5 further includes a base 37, which has strong rigidity. Part of the base 37 is disposed in the sleeve 35, and part of the base 37 is disposed in the head shell 2. The base 37 is mounted on the outside of the bottom 7 of the clip compartment 6. Figure 2A and Figure 2B The clip 22 , the first side portion 8 of the clip compartment 6 , and the second side portion 9 of the clip compartment 6 are all located on the inner side of the bottom 7 , and the inner side and the outer side refer to the two sides of the plane where the bottom 7 is located.

[0112] refer to Figure 4 , Figure 5A-5B , Figure 6A-6B , the clamp feeding drive mechanism includes a clamp feeding assembly and a clamp feeding drive tube 43. The clamp feeding drive tube 43 is partially located in the jaw driving tube 32 and can move axially in the jaw driving tube 32. The proximal end of the clamp feeding assembly is connected to the clamp feeding drive tube 43. In response to the positive movement of the wrench 4 from the open position, the clamp feeding drive tube 43 moves distally to drive the clamp feeding assembly to move distally, so that the clamp feeding assembly drives the clamp 22 to move from the clamping chamber 6 to the jaw assembly. The guide groove 38 is provided on the base 37, and the guide groove 38 accommodates the clamp feeding assembly and allows it to move axially. The distal end of the guide groove 38 is provided with a guide surface 39, which is an inclined surface, and the guide surface 39 is arranged at an angle to the axial direction. The guide surface 39 is inclined from its proximal end to the distal end toward the direction close to the clamping chamber 6. The bottom 7 of the clamping chamber 6 is provided with an inlet 10 corresponding to the guide surface 39.

[0113] The clip feeding drive mechanism further includes a third reset member 45. For example, the third reset member 45 is a spring. Figure 4 The inner wall of the jaw drive tube 32 is provided with a convex rib 33. The distal end of the third reset member 45 abuts against the convex rib 33 of the jaw drive tube 32, and the proximal end abuts against the distal end surface of the clamp delivery drive tube 43. The third reset member 45 is used to store energy when the clamp delivery drive mechanism moves forward, and the third reset member 45 restores the deformation and releases the energy to provide power for the reset and retreat of the clamp delivery drive mechanism.

[0114] refer to Figure 5A-5B , Figure 6A-6B and Fig. 6E The clamp feeding assembly includes a clamp feeding rod 40, an elastic rod 41 and a clamp feeding block 42. The proximal end of the clamp feeding rod 40 is connected to the clamp feeding driving tube 43, the distal end of the clamp feeding 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 clamp feeding block 42. The clamp feeding rod 40 is rigid and not easily deformed, so that it is prevented from bending when it moves axially in the guide groove 38 and causing the clamp feeding assembly to be blocked.

[0115] refer to Figure 5A-5B , Figure 6A-6B When the clip delivery driving tube 43 is driven to move in the first direction, the clip delivery driving tube 43 drives the clip delivery rod 40 to move distally, so that the elastic rod 41 and the clip delivery block 42 also move distally, and at this time the third reset member 45 is deformed. When the elastic rod 41 moves distally until the clip delivery block 42 abuts against the guide surface 39, the elastic rod 41 begins to bend, and the clip delivery block 42 obliquely enters between the first clip and the second clip in the clip compartment 6 from the entrance 10 of the clip compartment 6 along the guide surface 39, and abuts against the first clip at the rear end of the first clip to push it forward into the jaw assembly.

[0116] After the clip 22 is clamped in the jaw assembly, the clamp delivery block 42 at the distal end of the elastic rod 41 continues to abut the clip 22 from the rear end of the clip 22 to prevent the clip 22 from moving proximally (i.e., backward) during the clamping process. The jaw assembly is closed to close the clip 22, and then the jaw assembly is opened to disengage the clip 22 from the jaw assembly, thus completing the clamping. After the jaw assembly is closed, the clamp delivery assembly is reset under the action of the third reset member 45. Specifically, the clamp delivery rod 40 moves axially proximally (along the second direction) in the guide groove 38, driving the elastic rod 41 and the clamp delivery block 42 to retreat from the inlet 10 to the guide groove 38 along the guide surface 39.

[0117] refer to Figure 4 , Figure 5B and Figure 6B The clamp pushing drive mechanism includes a clamp pushing seat 46. The proximal end of the clamp pushing seat 46 is located in the clamp feeding drive tube 43, the other part of the clamp pushing seat 46 extends to the distal end and is arranged in the sleeve 35, the base 37 is installed on one side of the clamping chamber 6, and the clamp pushing seat 46 is arranged on the other side opposite to the clamping chamber 6. The clamp pushing seat 46 can move axially in the clamp feeding drive tube 43.

[0118] refer to Figure 5A-5B , Figure 6A-6B , corresponding to the M stations of the clamping bin 6, the clamping push seat 46 is provided with M side cavities at intervals, and a clamping push block 31 is provided in each side cavity. Each clamping push block 31 is connected to the clamping push seat 46 via a spring 72. The spring 72 provides the clamping push block 31 with a force to rotate toward the outside of the side cavity, specifically to make the distal end of the clamping push block 31 extend out of the side cavity and tilt toward the clamp 22. In response to the clamping push seat 46 advancing axially toward the distal end, the distal end of each clamping push block 31 abuts against and pushes a clamp 22 forward, so that the clamp 22 moves axially toward the distal end, and the clamp 22 smoothly passes through the first transverse barb 11 and the second transverse barb 12 (see Figure 2A ), so that the clip 22 moves from the current station to the adjacent distal station. As a result, the clip pusher 46 pushes the other clips (the clips 22 other than the first clip) in the clip compartment 6 forward one station. When the clip pusher 46 retreats axially toward the proximal end, the clip 22 cannot retreat under the action of the first transverse barb 11 and the second transverse barb 12, so that the clip pusher block 31 abuts against the clip and is squeezed by the clip 22 to rotate into the side cavity, so that the clip pusher block 31 retreats toward the proximal side along the side of the clip 22, avoiding the clip 22, thereby preventing the clip pusher block 31 from retreating toward the proximal end with the clip 22 when retreating.

[0119] As described above, the clamping forceps includes a transmission mechanism, and the wrench 4 drives the transmission mechanism to move, so that the clamp feeding drive mechanism performs the clamp feeding action, the jaw drive mechanism performs the clamping action, and the clamp pushing drive mechanism performs the clamp pushing action. The transmission mechanism realizes the transmission effect between the wrench and the clamp feeding drive mechanism, the jaw drive mechanism, and the clamp pushing drive mechanism. In this embodiment, the counting drive mechanism 50 is arranged in the transmission mechanism, for example, the counting drive mechanism 50 is fixedly connected or integrally formed with the rotating mechanism. The counting mechanism 90 is installed on the inner side of the head shell 2. In response to the wrench moving forward along the closed path, the transmission mechanism is driven by the wrench and synchronously drives the counting drive mechanism 50 to move along the first direction. When the counting drive mechanism 50 moves along the first direction, it can drive the counting mechanism 90 to change the count value.

[0120] refer to Figure 4 , Figure 7-10 As shown, the head shell 2 includes a first head shell 201 ( Figure 7 ) and the second head shell 202 ( Figure 8 ), the lower sides of the first head shell 201 and the second head shell 202 extend out the first handle shell and the second handle shell (not marked in the figure), respectively, and the first head shell 201 and the second head shell 202 can be buckled together to form an internal cavity. The inner side of the first head shell 201 is provided with a first mounting portion 203 and a clutch drive portion 204, and the inner side of the second head shell 202 is provided with a second mounting portion 205. The first mounting portion 203 and the second mounting portion 205 are respectively raised fixing columns. The counting mechanism 90 is a counting wheel that can rotate around an axis, and a mounting hole 93 is provided at the center of the counting wheel. The mounting hole 93 can be rotatably mounted on the radial outer side of the first mounting portion 203 and the second mounting portion 205, so that the counting mechanism 90 can be rotatably mounted on the handle shell 3. When the counting drive mechanism 50 drives the counting mechanism 90 to move and change the counting value, the counting mechanism 90 rotates around the first counting direction, that is, the first counting direction is the first rotation direction ( Figure 4 counterclockwise).

[0121] The transmission mechanism also includes a switching mechanism and a matching mechanism. Figure 4 Taking the placement direction and angle of the clamp as a reference, the structure and principle of the switching mechanism are explained in more detail:

[0122] refer to Figure 4 , Figure 4A and Figure 4B , Fig.11 , Fig.16The switching mechanism includes a seat body 62 and a clutch mechanism, and the clutch mechanism includes a first clutch member 63, a clutch switching mechanism, and a second clutch member 64. The seat body 62 includes a first connecting portion 621, a second connecting portion 622, and an extending portion 623. The first connecting portion 621 has a matching hole mechanism 624, and the matching hole mechanism 624 includes a first waist-shaped hole and a second waist-shaped hole. The first waist-shaped hole and the second waist-shaped hole are arranged opposite to each other in a direction perpendicular to the paper surface (with Fig.16 The first clutch member 63 is accommodated in the seat body 62, the second clutch member 64 is connected to the second connection portion of the seat body 62, that is, the distal end surface of the seat body 62, and the extension portion 623 extends in the proximal direction relative to the first connection portion 621 and the second connection portion 622. The side surface of the extension portion 623 facing the counting mechanism 90 (the upper surface of the extension portion 623) is provided with a counting drive mechanism 50. Therefore, as Figure 4 and Fig.16 As shown, when the wrench 4 is in the open position, the counting drive mechanism 50 is located at the proximal side of the counting mechanism 90 and is spaced a certain distance from the counting mechanism 90 in the axial direction, and the counting drive mechanism 50 does not act on the counting mechanism 90. When the wrench 4 moves forward and drives the seat body 62 to move in the first direction, the counting drive mechanism 50 moves synchronously with the seat body 62 in the first direction until the counting drive mechanism 50 cooperates with the counting mechanism 90 to change the count value of the counting mechanism 90.

[0123] The clip delivery drive tube 43 is sleeved on the outside of the clip pushing seat 46. The clip delivery drive tube 43 is partially located in the jaw drive tube 32 and can move axially in the jaw drive tube 32. The proximal end of the clip delivery drive tube 43 is provided with a groove 44 extending along the circumference. In the initial state, the seat body 62 is sleeved on the outside of the clip delivery 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.

[0124] The clutch switching mechanism includes a guide post 65 and a guide rail. The upper end of the first clutch member 63 is connected to the guide post 65. The guide rail is arranged in the head shell 2, and the guide post 65 can move on the guide rail. The guide rail is symmetrically arranged on the inner wall of the first head shell and the second head shell. That is, the inner wall of the first head shell is provided with a guide rail, and the inner wall of the second head shell is also provided with a guide rail.

[0125] The guide post 65 is accommodated in the seat body 62, and the guide post 65 has a first guide end and a second guide end. The first guide end of the guide post 65 extends from the first waist-shaped hole and is located on the guide rail of the inner wall of the first head shell and can move on the guide rail. The second guide end of the guide post 65 extends from the second waist-shaped hole and is located on the guide rail of the inner wall of the second head shell and can move on the guide rail. Each waist-shaped hole extends in the up-down direction, and the guide post 65 can move in the up-down direction. The guide rail includes a first guide surface 66 and a second guide surface 67, and the second guide surface 67 is higher than the first guide surface 66.

[0126] When the guide column 65 moves on the first guide surface 66, the first clutch 63 and the clamp delivery drive tube 43 remain in a combined state, that is, the clutch mechanism is combined with the clamp delivery drive mechanism. The wrench 4 pushes the seat body 62 so that the seat body 62 moves toward the distal end along the first direction, and the first clutch 63 moves forward accordingly and drives the clamp delivery drive mechanism to move toward the distal end to perform the clamp delivery action. The guide column 65 can move on the guide rail following the movement of the first clutch 63. Since the second guide surface 67 is higher than the first guide surface 66, when the guide column 65 moves to the second guide surface 67 of the guide rail, it drives the first clutch 63 to move upward, so that the first clutch 63 is disengaged from the groove 44 of the clamp delivery drive tube 43 and separated from the clamp delivery drive tube 43, thereby separating the clutch mechanism from the clamp delivery drive mechanism.

[0127] When the wrench 4 drives the clip delivery drive mechanism to move to the distal end through the switching mechanism, the second clutch 64 (the distal end surface of the seat body 62) gradually approaches the proximal end surface of the jaw drive tube 32. In response to the separation of the first clutch 63 from the clip delivery drive tube 43, the second clutch 64 abuts against the proximal end surface of the jaw drive tube 32, the clutch mechanism engages with the jaw drive mechanism, and the seat body 62 pushes the jaw drive tube 32 to move through the second clutch 64, thereby driving the jaw drive mechanism to move to perform the jaw closing action.

[0128] One part of the matching mechanism is connected to the seat body 62, and the other part is connected to the proximal end of the clamp pushing seat 46, and there is a distance between the one part of the matching mechanism and the other part. When the clamp feeding drive mechanism moves forward, the clamp pushing drive mechanism moves backward to store energy, and the clamp feeding action performed by the clamp feeding drive mechanism and the clamp pushing action performed by the clamp pushing drive mechanism are not synchronized.

[0129] refer to Figure 4 , Figure 4A , Fig.16, the matching mechanism includes an upper rack 69, an intermediate member 71 and a lower rack 70, and the intermediate member 71 includes a gear. The upper rack 69 is meshed with the gear, and the lower rack 70 is meshed with the gear. The clip delivery drive pipe 43 is drivably connected to the upper rack 69, and the clip delivery drive pipe 43 and the upper rack 69 move in the same direction. For example, as described above, the seat body 62 is drivably connected to the clip delivery drive pipe 43, the upper rack 69 is connected to the extension 623 of the seat body 62, and the clamp push seat 46 is connected to the lower rack 70. The movement directions of the upper rack 69 and the lower rack 70 are opposite. When the upper rack 69 moves toward the distal side, the lower rack 70 moves toward the proximal side. The upper rack 69 and the lower rack 70 are both arranged axially, and the gear is arranged between the upper rack 69 and the lower rack 70. The clamp push drive mechanism also includes a fourth reset member 68, one end of the fourth reset member 68 is connected to the head shell 2, and the other end is connected to the proximal end of the lower rack 70. For example, the fourth restoring member 68 is a spring.

[0130] As shown in 7-10, the counting mechanism 90 is a counting wheel installed between the two head shells 201 and 202, and a mounting hole 93 is provided in the center of the counting wheel, and the first mounting portion 203 and the second mounting portion 205 pass through the mounting hole 93. For example, the first mounting portion 203 penetrates the second mounting portion 205, thereby improving the alignment accuracy between the first head shell 201, the second head shell 202 and the counting mechanism 90. The counting mechanism 90 includes an annular indicating portion 91, an actuating portion located on the first side of the indicating portion 91, and an arcuate retaining wall 97 located on the second side of the indicating portion 91, and the arcuate retaining wall 97 is sleeved on the outer side of the second mounting portion 205. The outer peripheral surface of the indicating portion 91 is provided with a plurality of indicating marks indicating the count value, and the indicating marks are digits as an example for explanation here. The actuating portion includes a columnar structure and a plurality of ratchet teeth 92 distributed on the outer peripheral surface of the columnar structure, and the ratchet teeth 92 are arranged along the circumference of the columnar structure. The ratchet 92 corresponds to the number on the indicating portion 91 , that is, when the ratchet 92 rotates one tooth position along the first counting direction, the number in the indicating area on the indicating portion 91 opposite to the observation window is changed to an adjacent number.

[0131] like Figure 4B , Fig.10 and Fig.11As shown, the counting drive mechanism 50 includes an elastic arm, which is integrally formed with the transmission mechanism or fixedly connected. In response to the external force applied to the elastic arm, the elastic arm is deformed. The elastic arm is provided with a fixing portion 51 connected to the transmission mechanism, a first driving portion 52 and a second driving portion 53. The elastic arm can be integrally formed with the transmission mechanism or fixedly connected through the fixing portion 51. Therefore, the elastic arm can move synchronously in the same direction with the axial movement of the seat body 62. For example, the first end of the elastic arm is provided with a fixing portion 51, the second end of the elastic arm is provided with a first driving portion 52 and a second driving portion 53, and the second end of the elastic arm extends along the second direction relative to the first end of the elastic arm. Therefore, the first end of the elastic arm is a fixed end, and the second end is a free end. The first driving portion 52 is a tooth-shaped protrusion. When the first driving portion 52 moves to cooperate with the actuating portion, the first driving portion 52 meshes with the ratchet 92. Since the first driving portion 52 and the second driving portion 53 are arranged at the same end, that is, the second end, the first driving portion 52 and the second driving portion 53 can be driven to move synchronously. In response to the clutch drive unit 204 driving the second drive unit 53, the elastic arm is deformed by the force, thereby causing the first drive unit 52 to move to disengage from the actuator unit, that is, when the clutch drive unit 204 acts on the second drive unit 53 to move it in a direction close to the seat body 62, the second drive unit 53 synchronously drives the first drive unit 52 to move in a direction away from the ratchet tooth 92 and disengage from the ratchet tooth 92, thereby ensuring that the first drive unit 52 will only cooperate with one ratchet tooth 92 each time to complete a rotation of one tooth position, thereby realizing a change of one digit in the indication area on the indication unit 91 opposite to the observation window, thereby effectively avoiding repeated counting by the counting mechanism 90.

[0132] like Figure 4B As shown, there is a certain distance between the elastic arm and the surface of the seat body 62 in the up-down direction to form a deformation clearance space. When the second driving part 53 is driven by the clutch driving part 204, the second end of the elastic arm can rotate relative to the fixing part 51 and move toward the direction close to the seat body 62, and the elastic arm is deformed, so that the first driving part 52 moves downward and can be separated from the counting mechanism 90. An elastic connecting part 54 is provided between the first end and the second end of the elastic arm.

[0133] In this embodiment, a bending portion 55 is provided at the second end of the elastic arm. The top of the bending portion 55 is bent and protruded toward the counting mechanism 90, and the first driving portion 52 is arranged at the top of the bending portion 55, so that the first driving portion 52 can more easily drive the counting mechanism 90 to change the count value. The first driving portion 52 can be optionally a flange arranged at the top of the bending portion 55. The height of the first driving portion 52 is higher than the height of the elastic connecting portion 54, so that when the elastic connecting portion 54 moves to the bottom of the counting mechanism 90, the elastic connecting portion 54 will not interact with the actuating portion. And the height of the first driving portion 52 is higher than the highest point height of the second driving portion 53, so that the second driving portion 53 will not interfere with the ratchet 92. The second driving portion 53 is arranged on the side of the bending portion 55 facing the first end of the elastic arm, that is, on the side facing the elastic connecting portion 54. The second driving portion 53 is, for example, arranged directly adjacent to the bending portion 55. When the elastic arm does not undergo elastic deformation, the elastic connection portion 54 of the elastic arm is substantially parallel to the surface of the seat body 62. When the second driving portion 53 is driven by the clutch driving portion 204 to make the bent portion 55 move downward, the bent portion 55 and the elastic connection portion 54 at least partially undergo elastic deformation. After the second driving portion 53 is separated from the clutch driving portion 204, under the elastic deformation restoring force of the elastic arm, the bent portion 55 and the elastic connection portion 54 can move upward again and return to the initial state.

[0134] The existing counting drive mechanism and counting mechanism also have the problem of complex structure, which increases the overall structural complexity and cost of the clamp. In addition, the existing counting drive mechanism and counting mechanism may fail in structure during repeated use and are not stable enough.

[0135] This embodiment provides an elastic arm arranged on the surface of the seat body 62 as the counting drive mechanism 50. On the one hand, the counting drive mechanism 50 can move axially synchronously with the seat body 62 without the need to additionally set up other structures for driving the counting mechanism 90 to count, thereby simplifying the structure of the overall clamp and ensuring the synchronous movement of the counting drive mechanism 50 and the transmission mechanism. The counting drive mechanism 50 is limited by the transmission mechanism to prevent unnecessary movement of the counting drive mechanism 50, thereby ensuring the reliability of the counting function structure. On the other hand, the elasticity of the elastic arm itself can realize the connection and separation switching between the elastic arm and the counting mechanism 90 and the clutch drive unit 204. The structure is simple and relies on the elasticity of the elastic arm itself. It is not easy to cause elastic failure due to repeated use, thereby reducing the risk of counting function failure and improving the structural reliability of the counting drive mechanism and the counting mechanism.

[0136] like Figure 7 and Fig.19As shown, the clutch drive part 204 is disposed on the first head shell 201, for example, a protrusion disposed below the first mounting part 203, and the axial width of the lower part of the clutch drive part 204 is greater than the width of the upper part of the clutch drive part 204, so that the clutch drive part 204 and the second drive part 53 have a larger contact area, thereby improving the matching stability of the clutch drive part 204 and the second drive part 53. In another alternative embodiment, the clutch drive part 204 can also be disposed on the second head shell 202, for example, located below the second mounting part 205.

[0137] Combination Figure 9-11 21. When the seat body 62 drives the counting drive mechanism 50 to move from the proximal end along the first direction to cooperate with the counting mechanism 90, the first driving part 52 of the counting drive mechanism 50 meshes with the ratchet 92 of the actuating part, and drives the counting mechanism 90 to rotate along the first counting direction through the actuating part, changing the number of the indicating part 91 aligned with the observation window, and the doctor can observe the change of the count value of the counting mechanism 90 outside the head shell, and understand the number of remaining clips in the current clip compartment or the number of clips that have been applied. After the count value of the counting mechanism 90 changes, when the seat body 62 continues to drive the counting drive mechanism 50 to move along the first direction, the second driving part 53 moves to the bottom of the clutch driving part, the clutch driving part abuts against the second driving part 53 and acts on the second driving part 53, and the second driving part 53 is driven to move, thereby driving the first driving part 52 to move in the direction away from the counting mechanism, the elastic arm undergoes elastic deformation, and the first driving part 52 is separated from the ratchet 92 and no longer acts on the ratchet 92. The second driving part 53 includes a guiding slope, the height of which gradually decreases along the first direction, that is, the height of the guiding slope gradually increases along the second direction, and there is a gap between the guiding slope and the counting mechanism. As the counting driving mechanism 50 continues to move along the first direction, the clutch driving part 204 moves along the guiding slope of the second driving part 53, the clutch driving part 204 first faces the low position of the guiding slope, and gradually acts on the high position of the guiding slope, the guiding slope smoothly guides the movement of the counting driving mechanism 50 relative to the clutch driving part 204, so that the counting driving mechanism 50 can smoothly pass under the counting mechanism 90 without affecting the smoothness of the seat body 62 moving toward the distal end.

[0138] In this embodiment, when the wrench 4 is in the open position, the counting drive mechanism 50 is located at the proximal side of the counting mechanism 90 and there is a certain axial interval between the first drive portion 52 and the ratchet 92 at the bottom of the counting mechanism 90. The length of the axial interval determines the timing of the cooperation between the counting drive mechanism 50 and the counting mechanism 90. In one embodiment, during the movement of the wrench 4 from the open position to the intermediate position, the counting drive mechanism 50 moves to the bottom of the counting mechanism 90, and the first drive portion 52 engages the ratchet 92 and drives the counting mechanism 90 to rotate along the first counting direction. When the wrench 4 reaches the intermediate position, the indicator 91 of the counting mechanism 90 synchronously changes the count value in the designated area. This embodiment can ensure the synchronization of the clip delivery action and the change of the count value, and the doctor can also know that the clip delivery action has been completed by the change of the count value. Each time a clip delivery action is completed, the number of clips in the clip compartment is synchronously reduced by one, and the count value of the indicator 91 observed from the outside of the head shell also changes by one. When the wrench 4 continues to move forward from the intermediate position to the closed position, the clutch drive unit 204 acts on the second drive unit 53 to disengage the first drive unit 52 from the ratchet 92, so that the counting mechanism 90 remains in the current position. In another embodiment, a counting position is defined between the intermediate position and the closed position. During the movement of the wrench 4 from the intermediate position to the counting position, the first drive unit 52 moves to the bottom of the counting mechanism 90, the first drive unit 52 meshes with the ratchet 92 and drives the counting mechanism 90 to rotate along the first counting direction to change the count value of the indicator 91, and when the wrench 4 moves to the counting position, the indicator 91 completes the change of the count value. This method is conducive to ensuring that the count value of the counting mechanism 90 is changed only after each clip delivery is successful. When the wrench 4 continues to move forward from the counting position to the closed position, the clutch drive unit 204 acts on the second drive unit 53 to disengage the first drive unit 52 from the ratchet 92, so that the counting mechanism 90 remains in the current position. It should be noted that the position of the wrench 4 corresponding to the change in the count value of the indicator 91 of the counting mechanism 90 may also be other positions.

[0139] The counting mechanism 90 can only rotate in one direction, i.e. Figure 4It can only rotate counterclockwise but not clockwise from the perspective of the display unit 91. The number on the indicator portion 91 corresponding to the observation window can only change in one direction. For example, when the counting mechanism 90 is used to indicate the number of remaining clips in the clip compartment, the number on the indicator portion 91 can only decrease gradually. When the counting mechanism 90 is used to indicate the number of clips that have been applied, the number on the indicator portion 91 can only increase gradually. In order to achieve the one-way rotation of the counting mechanism 90, the shell also includes a stop mechanism 206, and the counting mechanism 90 is also provided with a stop portion 94. After the wrench 4 reaches the closed position, the wrench 4 is released, and the wrench 4 can be reset to the open position. The transmission mechanism is also reset in the second direction under the action of the reset member, driving the counting drive mechanism 50 to move in the second direction. The stop mechanism 206 is combined with the stop portion 94 to prevent the actuator from being driven by the first drive unit 52 to move in the second counting direction. In this embodiment, the second counting direction is opposite to the first counting direction. Figure 4 From the perspective of , it is clockwise.

[0140] like Figure 8 and Fig.10As shown, the stop mechanism includes a mounting groove 207, and the inner wall of the mounting groove 207 is provided with a plurality of stop teeth 208 arranged along a circumferential direction. The stop portion 94 includes a rod portion 95 and a matching portion 96 located at the end of the rod portion 95, and the matching portion 96 protrudes outward relative to the rod portion 95. The retaining wall 97 and the stop portion 94 are both located on the inner side of the mounting groove 207, and the matching portion 96 is meshed with the stop teeth 208. The stop teeth 208 include a guide surface 209 and a stop surface 210, and the guide surface 209 has a smaller inclination angle relative to the stop surface 210. When the actuator is driven by the first driving part 52 to move in the first counting direction, the matching part 96 matches with the guide surface 209 of the stop tooth 208, and the matching part 96 can move along the guide surface 209 and move along another adjacent guide surface 209 after jumping and rotate relative to the stop tooth 208, so that the stop mechanism 206 does not block the rotational movement of the actuator along the first counting direction, thereby not affecting the normal counting of the counting mechanism 90. When the counting drive mechanism 50 moves in the second direction, the first driving part 52 acts on the actuator so that the counting mechanism 90 has a tendency to rotate in the second counting direction, and the matching part 96 matches with the stop surface 210 of the stop tooth 208, thereby blocking the counting mechanism 90 from moving in the second counting direction, thereby ensuring that the counting mechanism 90 can only rotate unidirectionally in the first counting direction. The above embodiment is described by taking the counting mechanism 90 provided with a stop part and the inner side of the housing provided with a stop mechanism as an example. In another alternative embodiment, the counting mechanism 90 may also be provided with a stop mechanism, the stop mechanism includes a mounting groove and a plurality of stop teeth arranged inside the mounting groove, a stop portion is arranged inside the housing, the stop portion has a rod portion and a matching portion protruding outward, the matching portion is engaged with the stop teeth, and the unidirectional rotation of the counting mechanism 90 may also be ensured. In yet another alternative embodiment, the stop mechanism arranged inside the housing or the counting mechanism 90 may include a columnar structure and a plurality of stop teeth arranged on the outer circumference of the columnar structure, the stop portion arranged inside the counting mechanism 90 or the housing includes a rod portion and a matching portion protruding inward, the rod portion is located outside the columnar structure, the matching portion is engaged with the stop teeth, and the unidirectional rotation of the counting mechanism 90 may also be ensured. The positional relationship between the retaining wall 97 and the stop portion 94 is also not limited to the relationship shown in the figure, or the retaining wall 97 may not be provided. The above variations all belong to the protection scope of the present disclosure.

[0141] The clip applier also includes a backstop mechanism, which can abut against the clip delivery drive mechanism to prevent the clip delivery drive mechanism from backing out when the first clutch member 63 of the switching mechanism is separated from the clip delivery drive mechanism. When the wrench 4 is in the middle position, the user releases the wrench 4, and the backstop mechanism still abuts against the clip delivery drive mechanism to prevent the clip delivery drive mechanism from backing out, as described below.

[0142] refer to Figure 4 as well as Figures 12 to 15The anti-retraction 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 handle housing 3 via a first rotating shaft, so that the guide pivot 73 rotates relative to the handle housing 3 around the first rotating shaft. The bias spring 74 gives a thrust to the guide pivot 73, so that the guide pivot 73 tends to rotate clockwise. The guide pivot 73 is provided with an anti-retraction portion 79. The wrench 4 is relatively movably connected to the guide pivot 73. During the movement of the wrench 4 from the open position to the middle position, the bias spring 74 pushes the guide pivot 73 to rotate, so that the anti-retraction portion 79 approaches and abuts against the clamp feeding drive tube 43 to prevent it from retreating.

[0143] The guide pivot member 73 further comprises a force-bearing portion 77, a guide portion 78, a first rotating arm 80 extending from the pivot portion 76 to the proximal end, and a second rotating arm 81 extending from the pivot portion 76 to the distal end. The guide pivot member 73 further comprises a third rotating arm 82 extending obliquely upward from the pivot portion 76, and the third rotating arm 82 forms an obtuse angle with the first rotating arm 80. The end of the first rotating arm 80 is the force-bearing portion 77, the end of the second rotating arm 81 is the guide portion 78, and the end of the third rotating arm 82 is the stop portion 79.

[0144] One end of the bias spring 74 abuts against the force receiving portion 77, and the other end abuts against the handle housing 3. The first rotating arm 80 and the second rotating arm 81 form a lever with the first rotating shaft of the pivoting portion 76 as a fulcrum. The bias spring 74 and the guide portion 78 are located at both ends of the lever. When the bias spring 74 is in a compressed state, the bias spring 74 applies a thrust to the force receiving portion 77, so that the guide pivot member 73 has a tendency to rotate counterclockwise, that is, the stop portion 79 and the guide portion 78 also have a tendency to rotate counterclockwise (with a rotation angle of 1 / 400 of the first rotation axis). Figure 4 The placement angle of the clamp in the middle is used as a reference).

[0145] refer to Fig.16 The wrench 4 is provided with a pivot end 85 pivotally connected to the handle housing, and the wrench 4 rotates around the pivot end 85. The wrench 4 also has a guide channel 86. Fig.12 and Fig.13 The back-stopping mechanism of this embodiment further includes a guide member 75, which is disposed on the guide portion 78 of the guide pivot member 73. At least a portion of the guide member 75 is accommodated in the guide channel 86. When the wrench 4 rotates around its pivot end 85, the guide channel 86 rotates accordingly, and the guide member 75 rotates around the first rotation 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 guide member 75 is restricted from moving in all directions in the guide channel 86 and cannot leave the guide channel 86, so that the guide member 75 in this embodiment cannot be separated from the wrench 4.

[0146] refer to Fig.14 and Fig.15The guide channel 86 includes a starting point a, a stop point b and an end point c. The distance from the starting point a to the pivot end 85 of the wrench 4 and the distance from the end point c to the pivot end 85 of the wrench 4 are both smaller 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.

[0147] The guide channel 86 includes a main channel 87 and only one slave channel 89 extending from an opening 88 of the main channel 87, and the opening 88 is located between the two ends of the main channel 87. The slave 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 slave channel 89 and the pivot end 85 is greater than the distance between the main channel 87 and the pivot end 85. The two ends of the main channel 87 are respectively provided with a starting point a and an end point c. The back-off point b is located in the slave channel 89. The bias spring 74 applies a force to the guide pivot member 73, so that the guide member 75 can be separated from the main channel 87 and enter the slave channel 89.

[0148] When the wrench 4 is in the open position, the guide member 75 is at the starting point a. In the process of the wrench 4 moving from the open position to the intermediate position, the wrench 4 drives the guide member 75 to rotate clockwise from the starting point a and lift upward to the slave channel 89 under the action of the bias spring 74, and move to the stop point b in the slave channel 89. When the wrench 4 moves from the intermediate position to the closed position, the wrench 4 drives the guide member 75 to move downward from the stop point b in the slave channel 89 to the end point c of the main channel 87. When the guide member 75 enters the slave channel 89, the guide pivot member 73 rotates upward, so that the stop portion 79 of the guide pivot member 73 moves upward.

[0149] refer to Fig.15 , the secondary channel 89 includes a blocking wall 84. The main channel 87 includes a first wall extending from the starting point a to the blocking wall 84, and the first wall and the blocking wall 84 are at a right angle or an acute angle. In this way, through the simple angle design of the guide channel 86, it can be ensured that the blocking wall 84 effectively prevents the guide member 75 from retreating from the stop point b to the starting point a, so that the wrench 4 can stay in the middle position.

[0150] In order to enable the guide member 75 to move from the stop point b to the end point c, the slave channel 89 further includes a guide wall 83. The main channel 87 further includes a second wall extending from the end point c to be connected to the guide wall 83, and the second wall forms an obtuse angle with the guide wall 83. Such a simple angle design of the guide channel ensures that the guide member 75 can move from the stop point b to the end point c.

[0151] refer to Figure 12-15, the user presses the wrench 4 to make the wrench 4 move from the open position to the middle position. When the guide member 75 moves from the starting point a to the stop point b, the guide member 75 enters the slave channel 89 from the main channel 87, and the guide pivot member 73 is rotated and lifted upward. At this time, the first clutch member 63 is separated from the clamp delivery drive tube 43, and the second clutch member 64 is in contact with the jaw drive tube 32. At this time, the clamping forceps is in the clamp delivery completion state, the clamp 22 is in the ready position, and the stop portion 79 moves up to abut against the clamp delivery drive tube 43 to prevent it from retreating.

[0152] The user continues to press the wrench 4, and the wrench 4 moves from the middle position to move the guide member 75 from the stop point b to the end point c. The guide member 75 continues to move in the passage 89, and the guide pivot member 73 does not move downward. The stop portion 79 remains in contact with the clip delivery drive tube 43 to prevent the clip delivery drive tube 43 from retreating, so that the clip delivery block 42 abuts against the clip 22 at the proximal end of the clip 22, and the clip 22 does not retreat during the clamping process, thereby ensuring the stability of the clamping. During this process, the second clutch member 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).

[0153] The user continues to press the wrench 4, and when the wrench 4 reaches the closed position and the guide member 75 moves from the stop point b along the slave channel 89 to the end point c in the main channel 87, the stop portion 79 moves to the bottom of the clip delivery drive tube 43, and the stop portion 79 separates from the clip delivery drive tube 43, and the clip delivery drive tube 43 retreats and resets under the action of the third reset member 45. When the guide member 75 reaches the end point c, the clip applicator is in the clamping completion state, and the clip 22 held in the jaw assembly 14 is compressed to the closed state. The wrench 4 is released, the jaw drive mechanism is reset under the action of the first reset member 36, the switching mechanism is reset under the action of the fourth reset member 68, and the wrench 4 is reset under the drive of the switching mechanism.

[0154] The following is a detailed description of the working process of the transmission mechanism of the clamping forceps performing the clamp feeding action, the clamping action, the clamp pushing action, and the counting drive mechanism moving along the first direction to change the count value of the counting mechanism. The following takes the count value of the counting mechanism changing when the wrench moves to the counting position as an example, but the present disclosure is not limited to this. By adjusting the axial distance between the first drive part 52 and the lowermost ratchet of the actuating part when the wrench is in the open position, the timing of the count value completion of the counting mechanism during the forward movement of the wrench can be adjusted. For example, the smaller the axial distance, the earlier the first drive part engages with the ratchet during the forward movement of the wrench, and the larger the axial distance, the later the first drive part engages with the ratchet during the forward movement of the wrench.

[0155] like Figure 4 and Figure 16-19As shown, when the wrench 4 is in the open position, the counting drive mechanism 50 is located at the proximal side of the counting mechanism 90, and there is an axial distance between the first drive portion 52 and the ratchet 92 at the bottom of the actuating portion of the counting mechanism 90, and there is no interaction between the counting drive mechanism 50 and the counting mechanism 90. There is an axial distance between the second drive portion 53 and the clutch drive portion 204, and there is no interaction between the second drive portion 53 and the clutch drive portion 204. A plurality of clamp push blocks 31 are respectively located at the front side of the second clamp to the Nth clamp. The user presses the wrench 4 to move the wrench 4 from the open position toward the middle position, and the wrench 4 pushes the seat 62 of the switching mechanism to move the switching mechanism toward the distal end, and the guide column 65 moves on the first guide surface 66. The first clutch member 63 moves with the switching mechanism and drives the clamp feeding drive mechanism to move toward the distal end to perform the clamp feeding action, and at the same time, the upper rack 69 moves toward the distal end. During the movement of the upper rack 69 toward the distal end, the upper rack 69 drives the lower rack 70 to retreat through the intermediate piece 71. Since the lower rack 70 is connected to the push clamp seat 46, the push clamp seat 46 is driven to retreat, so that the fourth reset member 68 accumulates energy and the multiple push clamp blocks 31 move toward the proximal side respectively.

[0156] like Fig. 20 and Fig.21 As shown, when the wrench 4 reaches the middle position, the guide column 65 of the switching mechanism moves to the second guide surface 67 of the guide rail, the first clutch 63 separates from the clamp feeding drive tube 43, the forward stroke of the clamp feeding drive mechanism ends (the clamp feeding action is completed), and the clamp 22 enters the jaw assembly 14. At the same time, the second clutch 64 abuts against the proximal end surface of the jaw driving tube 32 to push the jaw driving tube 32 to move. The guide member 75 of the anti-retraction mechanism enters the slave channel 89 from the main channel 87 of the guide channel 86, and the guide pivot member 73 rotates upward and lifts up, and a "click" sound is emitted to remind the user that the wrench has reached the middle position. At this time, the wrench 4 is released, and the wrench 4 can stay in the middle position due to the action of the blocking wall 84 of the guide channel 86. Under the action of the anti-retraction mechanism, the clamp feeding block 42 of the clamp feeding drive mechanism continues to abut against the clamp 22 from the rear end of the clamp 22, so that the clamp 22 is retained in the jaw assembly 14. As shown Fig. 6A and Figure 6B As shown, each clamp pushing block 31 moves to one side of the second clamp to the Nth clamp in the radial direction of the clamp compartment 6. For example, when the wrench 4 is in the open position, the clamp pushing block 31 is located in front of the second clamp. Figure 5A , 5B The most distal clamp pushing block 31 moves proximally to one side of the second clamp in the radial direction of the clamp chamber 6, and the two clamps overlap in the radial direction of the clamp chamber 6, as shown in FIG. Fig. 6A , 6B As shown, the clamp push block 31 has not yet moved to the rear side of the second clamp. The radial direction of the clamp compartment 6 is perpendicular to the axial direction of the clamp compartment 6 and is along the width direction of the clamp compartment. Fig. 6AFor example, the radial direction of the clamping chamber 6 is perpendicular to the drawing. Figures 20-23 As shown, when the wrench 4 moves from the open position to the intermediate position, the counting drive mechanism 50 moves along the first direction with the seat body 62 and approaches the counting mechanism 90, and the elastic connecting portion 54 of the counting drive mechanism 50 is at least partially located below the counting mechanism 90. The first driving portion 52 is still located at the proximal side of the counting mechanism 90 without contacting and interacting with the ratchet 92.

[0157] like Fig.24 and Fig.25 As shown, when the wrench 4 is in the middle position, pressing the wrench 4 causes the wrench 4 to move from the middle position toward the closed position, and the backstop mechanism gradually disengages from the clamp feeding drive tube 43. Under the action of the wrench 4, the switching mechanism continues to push the jaw driving mechanism and the upper rack 69 forward, and at the same time, the upper rack 69 continues to drive the lower rack 70 backward through the middle piece 71. Since the lower rack 70 is connected to the clamp pushing seat 46, the clamp pushing seat 46 continues to retreat. When the clamp pushing seat 46 retreats, the fourth reset member 68 continues to store energy, and the jaw driving 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 is closed (the clamping action is completed), the fourth reset member 68 finishes storing energy, the backstop mechanism completely disengages from the clamp feeding drive tube 43, and the clamp feeding drive tube 43 is reset under the action of the third reset member 45. As shown in Figure 6C , 6D As shown, each clamping block 31 moves proximally to the rear side of the second clamp to the Nth clamp, and still taking the clamping block 31 located at the front side of the second clamp when the wrench 4 is in the open position as an example, the clamping block 31 moves to the rear side of the second clamp. The wrench 4 is released, the jaw drive mechanism is reset under the action of the first reset member 36, and the clamping seat 46 moves forward under the action of the fourth reset member 68 to move the other clamps in the clamping compartment 6 forward by one station (the clamping action is completed).

[0158] Combine the following Figures 26-30 Specifically introduce the status of the counting drive mechanism and the counting mechanism when the wrench moves from the middle position to the closed position. A counting position is defined between the middle position and the closed position. When the wrench is in the middle position and continues to be pressed, the wrench first moves to the counting position to change the counting value of the counting mechanism, and then continues to move to the closed position to complete a movement stroke of the wrench. Fig.26 and Fig. 27 As shown, when the wrench is pressed to move the wrench from the middle position toward the counting position, the wrench drives the seat body 62 to move in the first direction, and the seat body 62 drives the counting drive mechanism 50 to continue to move in the first direction until the first drive portion 52 is located below the counting mechanism 90, and the first drive portion 52 is meshed with a ratchet 92 at the bottom of the actuating portion of the counting mechanism 90, and when the counting drive mechanism 50 continues to move in the first direction, the first drive portion 52 gives the ratchet 92 a force to move it in the first counting direction ( Fig.26 The counterclockwise rotation force of the counting mechanism 90 causes the counting mechanism 90 to rotate in the first counting direction to change the number of the indicating portion of the indicating portion 91 opposite to the observation window, thereby changing the counting value of the counting mechanism 90. Fig.28 As shown, in the process of the first driving part 52 driving the counting mechanism 90 to change the count value, the clutch driving part 204 is opposite to the low position of the guiding inclined surface of the second driving part 53, and does not act on the second driving part 53, and does not affect the driving effect of the first driving part 52 on the counting mechanism 90. When the wrench reaches the counting position, the counting mechanism 90 completes the change of the count value.

[0159] like Fig.29 and Fig.30 As shown, after the wrench reaches the counting position, when the wrench is pressed to continue to move toward the closed position, the guiding inclined surface of the second driving part 53 moves along the first direction, the clutch driving part 204 abuts against the second driving part 53 and applies a downward force to the second driving part 53, so that the second driving part 53 drives the first driving part 52 to move downward together, the elastic arm is at least partially elastically deformed, and the first driving part 52 is disengaged from the ratchet of the counting mechanism, the counting driving mechanism 50 can pass through the bottom of the clutch driving part 204, and the first driving part 52 no longer acts on the counting mechanism. After the second driving part 53 moves to the far end of the clutch driving part 204, the clutch driving part 204 no longer acts on the second driving part 53, and the initial state can be partially or completely restored under the elastic restoring force of the elastic arm itself. Through the cooperation of the second driving part 53 and the clutch driving part 204, it is effectively avoided that the first driving part 52 over-drives the counting mechanism to rotate, and repeated counting is avoided.

[0160] After the wrench reaches the closed position, release the wrench and the wrench returns from the closed position to the open position. The transmission mechanism moves and resets in the second direction under the action of the reset member, and drives the counting drive mechanism 50 to move in the second direction. The second drive portion 53 of the counting drive mechanism 50 first abuts against the clutch drive portion 204. As the counting drive mechanism 50 moves in the second direction, the second drive portion 53 gradually disengages from the clutch drive portion 204. When the counting drive mechanism 50 continues to move in the second direction to the position of the counting mechanism 90, the first drive portion 52 gives the actuating portion of the counting mechanism 90 a force to rotate it in the second counting direction, so that the actuating portion has a tendency to rotate in the second counting direction. In the stop mechanism 206 (shown in Figure 8 ) and the stopper 94 of the counting mechanism 90 (shown in Fig.10) under the cooperation of the stopper, the counting mechanism 90 cannot rotate in the second counting direction, and the first drive part 52 is subjected to the reaction force of the ratchet and moves in the direction away from the counting mechanism 90 (downward), so that the elastic arm is at least partially elastically deformed. After the deformed counting drive mechanism passes under the counting mechanism 90 and resets to the proximal end of the counting mechanism 90, the counting drive mechanism 50 can be restored to its initial state under the elastic restoring force of the elastic arm itself.

[0161] In summary, by adopting the clamping forceps of this embodiment, the counting of the clips is achieved by changing the count value of the indicating portion 91 of the counting mechanism 90 through the cooperation between the first driving portion 52 of the counting drive mechanism 50 and the actuating portion of the counting mechanism 90, and after the count value of the indicating portion 91 is changed, the clutch driving portion 204 cooperates with the second driving portion 53 of the counting drive mechanism 50 to drive the first driving portion 52 to disengage from the actuating portion of the counting mechanism 90 without continuing to drive the actuating portion to move, thereby effectively avoiding repeated counting of the counting mechanism 90 and improving the accuracy of the clip counting of the counting mechanism 90.

[0162] In an optional embodiment, the counting drive mechanism 50 includes an elastic arm arranged on the base body 62, which ensures the synchronous movement of the elastic arm and the transmission mechanism, improves the stability of the cooperation between the counting drive mechanism and the transmission mechanism, and does not need to be additionally provided with a separate counting drive mechanism and a fixing structure of the counting drive mechanism, so that the overall structure of the clamp is simpler, and the cooperation between the first drive part 52 and the counting mechanism 90, and between the second drive part 53 and the clutch drive part 204 is achieved through the elasticity of the elastic arm itself, thereby avoiding functional failure problems that may occur due to repeated use, and having higher reliability. There is no need to set an additional elastic component to reset the counting drive mechanism 50 after separation from the clutch drive part 204, and the structure is simpler.

[0163] In addition, in an optional embodiment, by providing a stop portion 94 on one side of the counting mechanism 90 and a stop mechanism 206 on the inner side of the shell, after the clamping action is completed, when the transmission mechanism drives the counting drive mechanism 50 to move in the second direction, the first drive portion 52 cannot drive the counting mechanism 90 to rotate along the second counting direction, which ensures that the counting mechanism 90 can only rotate in one direction and the indication mark of the indication portion 91 can only change in one direction.

[0164] In some other embodiments of the present disclosure, the clip delivery action and the clip pushing action can be completed simultaneously, that is, the clip pushing drive mechanism is arranged in the clip delivery drive mechanism. For example, the clip delivery assembly is provided with a plurality of push barbs along the axial direction, each push barb corresponds to a clip in the clip compartment, and the proximal end of each push barb is fixed to the clip delivery assembly, and the distal end is an inclined end extending toward the clip, and in response to the wrench 4 moving from the open position to the middle position, the clip delivery assembly pushes the plurality of clips 22 in the clip compartment 6 to the far side by the distance of one station through the push barb, and at the same time pushes the clip 22 in the farthest station in the clip compartment 6 into the jaw assembly.

[0165] In some other embodiments of the present disclosure, the clutch mechanism can realize the power switching between the clamp feeding drive mechanism and the jaw driving mechanism by means of elastic deformation. For example, the clutch mechanism includes a spring, which is arranged between the clamp feeding drive mechanism and the seat body 62, wherein the seat body 62 is in direct contact with the wrench 4 for transmitting the power of the wrench 4. In response to the wrench 4 moving from the open position to the middle position, the length of the spring is the original length, the clamp feeding drive mechanism moves synchronously with the seat body 62, and the farthest clamp in the clamping bin is pushed into the jaw assembly; in response to the wrench 4 moving from the middle position to the closed position, the clamp feeding drive mechanism is limited, the spring is compressed to allow the seat body 62 to continue to move distally, and the seat body 62 moves distally against the sleeve 35 to close the jaw assembly 14.

[0166] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0167] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present disclosure. They are not intended to limit the protection scope of the present disclosure. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A clip applier, characterized in that: The invention comprises a jaw assembly, a clamping chamber, a housing, a wrench and a transmission mechanism, wherein the transmission mechanism comprises a clamp feeding drive mechanism and a jaw drive mechanism; the clamping chamber has a clamp; the wrench is movably connected to the housing, and the wrench has an open position, an intermediate position and a closed position, and the movement path of the wrench from the open position via the intermediate position to the closed position is a closed path; In response to the wrench moving from the open position to the intermediate position, the clamp feeding drive mechanism drives the clamp to move from the clamp magazine to the jaw assembly; 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 clamp in the jaw assembly is closed; Wherein, the clamp applier further comprises a counting drive mechanism, a counting mechanism and a clutch drive unit, the counting mechanism comprises an actuating unit and an indicating unit, the counting drive mechanism comprises a first drive unit and a second drive unit connected to the first drive unit; When the wrench moves forward along the closed path, the first driving part engages with the actuating part to drive the actuating part to move along a first counting direction to change the counting value of the indicating part; the counting value indicates the number of remaining clips in the clip compartment or the number of clips that have been used; After the count value of the indicating part changes and the wrench continues to move in the forward direction, the clutch driving part drives the first driving part to move and disengage from the actuating part through the second driving part.

2. The clip applier according to claim 1, wherein: When the wrench moves from the open position to the intermediate position, the first driving part drives the actuating part to move along the first counting direction to change the counting value of the indicating part; When the wrench moves from the intermediate position to the closed position, the clutch driving portion drives the first driving portion to move and disengage from the actuating portion through the second driving portion.

3. The clip applier according to claim 1, wherein: A counting position is further included between the intermediate position and the closed position. When the wrench moves from the intermediate position to the counting position, the first driving part drives the actuating part to move along the first counting direction to change the counting value of the indicating part. When the wrench moves from the counting position to the closing position, the clutch driving portion drives the first driving portion to move and disengage from the actuating portion through the second driving portion.

4. The clip applier according to claim 1, wherein: The counting drive mechanism is fixedly connected to or integrally formed with the transmission mechanism, and when the wrench moves forward along the closed path, the transmission mechanism is driven by the wrench to synchronously drive the counting drive mechanism to move along the first direction.

5. The clip applier according to claim 4, wherein: The counting drive mechanism comprises an elastic arm, the elastic arm is fixedly connected to or integrally formed with the transmission mechanism, and the first drive part and the second drive part are both arranged on the elastic arm; In response to the clutch driving part driving the second driving part, the elastic arm is deformed by the force, so that the first driving part moves to be separated from the actuating part.

6. The clip applier according to claim 5, wherein: The first end of the elastic arm is fixedly connected to or integrally formed with the transmission mechanism, the second end of the elastic arm is a free end, and the second end of the elastic arm extends along a second direction relative to the first end of the elastic arm; the second direction is opposite to the first direction; the first driving part and the second driving part are arranged at the second end; After the count value of the indicating part changes and the wrench continues to move forward, the clutch driving part drives the second driving part to rotate the second end of the elastic arm relative to the first end, thereby separating the first driving part from the actuating part.

7. The clip applier according to claim 6, wherein: A bending portion is provided at the second end of the elastic arm, and the top of the bending portion is bent and protruded toward the counting mechanism. The first driving portion is provided at the top of the bending portion, and the second driving portion is provided at one side of the bending portion close to the first end of the elastic arm.

8. The clip applier according to claim 7, wherein: The second driving part comprises a guiding slope, the height of the guiding slope gradually decreases along the first direction, and there is a gap between the guiding slope and the counting mechanism; In response to the wrench moving forward along the closed path, the counting drive mechanism moves along the first direction, and the first driving part engages with the actuating part to drive the actuating part to move along the first counting direction to change the counting value of the indicating part; after the counting value of the indicating part changes and the wrench continues to move forward, the clutch driving part slides and abuts against the guide slope, so that the second end of the elastic arm moves, thereby disengaging the first driving part from the actuating part.

9. The clip applier according to claim 6, wherein: The transmission mechanism comprises a seat body, the seat body is operably abutted against the wrench to be driven by the wrench in forward motion, and the first end of the elastic arm is fixedly connected to the seat body or integrally formed; In response to the wrench moving forward along the closed path, the seat body moves along the first direction, thereby driving the elastic arm to move along the first direction.

10. The clip applier according to claim 1 or 6, wherein: The second driving part includes a guiding slope, the height of which gradually decreases along the first direction. After the count value of the indicating part changes and the wrench continues to move forward, the guiding slope moves along the first direction, and the clutch driving part acts on the guiding slope to move the second driving part, thereby causing the first driving part to move to disengage from the actuating part.

11. The clip applier according to claim 1 or 10, wherein: The clutch driving part is provided on the inner side of the shell, and the clutch driving part is a protrusion extending toward the counting driving mechanism.

12. The clip applier according to claim 4, wherein: The shell also includes a stop mechanism, and the counting mechanism also includes a stop part. When the counting drive mechanism moves along the second direction, the stop mechanism cooperates with the stop part to block the actuating part from moving along the second counting direction; the second direction is opposite to the first direction, and the first counting direction is opposite to the second counting direction.

13. The clip applier according to claim 12, wherein: One of the stopper portion and the stopper mechanism comprises a plurality of stopper teeth, and the other is provided with a matching portion, wherein the stopper teeth comprise a guide surface and a stopper surface; When the counting drive mechanism moves along the first direction and the first driving part drives the actuating part to move along the first counting direction, the matching part slides along the guide surface of the stop tooth to allow the counting mechanism to move along the first counting direction; When the counting drive mechanism moves along the second direction, the matching portion matches with the stop surface of the stop tooth to block the counting mechanism from moving along the second counting direction.

14. The clip applier according to claim 12, wherein: The first counting direction is the first rotation direction, the stop mechanism is provided with a mounting groove, the inner wall of the mounting groove is provided with a plurality of stop teeth arranged along a circumferential direction, the stop portion includes a matching portion protruding outward, the stop portion is located on the inner side of the mounting groove, and the matching portion is engaged with the stop tooth to prevent the actuator from moving along the second counting direction.

15. The clip applier of claim 1, wherein: The clamp delivery drive mechanism includes a clamp delivery rod. In response to the wrench moving forward from the open position to the middle position, the clamp delivery rod moves toward the distal end, and the clamp delivery rod pushes the clamp, thereby causing the clamp to move from the clamp magazine to the jaw assembly.

16. The clip applier of claim 1, wherein: The jaw driving mechanism includes a sleeve. In response to the wrench moving from the intermediate position to the closed position, the sleeve moves toward the distal end, and the jaw assembly is at least partially accommodated in the sleeve, thereby driving the jaw assembly to close.

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