Clip Applier

Abstract

The present disclosure relates to a clamp applicator, a clamp applicator characterized by comprising a jaw assembly, a clamp magazine, a handle assembly, a clamp delivery drive mechanism, a jaw drive mechanism and an auxiliary drive mechanism; during the process of completing the clamp delivery action, the jaw assembly is partially closed by the auxiliary drive mechanism. Thus, the clamp can be ensured to abut against the jaw assembly during the process of entering the jaw assembly from the clamp magazine, so that the clamp can move forward stably in the jaw assembly even when the opening amplitude is small. This prevents the clamp from creeping after being compressed in the clamp magazine for a long time, reducing its elasticity, causing the clamp to move unstably in the jaw assembly, or even falling off from the jaw assembly, affecting the use of the clamp applicator.

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 to stop bleeding. 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: clip delivery action, jaw closing action (clamp application action) and 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] Embodiments of the present disclosure are directed to providing a clip applier.

[0006] The present disclosure proposes the following technical solution: A clip applier, characterized in that it comprises a jaw assembly, a clamp magazine, a handle assembly, a clip delivery drive mechanism, a jaw drive mechanism and an auxiliary drive mechanism;

[0007] The handle assembly comprises a handle housing and a wrench movably connected to the handle housing, the wrench having an open position, an intermediate position and a closed position, and the wrench is provided with a first driving portion;

[0008] The auxiliary driving mechanism comprises a sliding member and an abutment member, wherein the abutment member is movably connected to the sliding member;

[0009] The clip compartment is connected to the handle housing, and the clip compartment includes a clip, and the clip is in a pre-compressed state;

[0010] The jaw drive mechanism includes a sleeve configured to move axially and distally to close the jaw assembly;

[0011] In response to the wrench moving from the open position to the intermediate position, the clip delivery drive mechanism drives the clip from the clip magazine into the jaw assembly, and the first drive portion pushes the abutment member to move distally, so that the sliding member pushes the sleeve to move distally, thereby partially closing the jaw assembly;

[0012] In response to the wrench moving from the intermediate position to the closed position, the sleeve moves distally to close the jaw assembly; in response to the wrench moving from the closed position to the open position, the first drive portion pushes the abutment member to move relative to the sliding member so that the abutment member moves to the avoidance position, so that the wrench is reset to the open position.

[0013] In some embodiments, during the process of the wrench moving from the open position to the closed position, in response to the rotation of the wrench, the first driving portion pushes the abutment member from the proximal side to move distally, so that the sliding member pushes the sleeve to move distally, thereby partially closing the jaw assembly; in response to the wrench continuing to rotate, the first driving portion passes over the abutment member and moves to the distal side of the abutment member, and the first driving portion is separated from the abutment member.

[0014] In some embodiments, the jaw drive mechanism includes a first reset member, which biases the sleeve proximally to open the jaw assembly.

[0015] In some embodiments, when the wrench is located in the middle position, the first driving portion is located on the distal side of the abutment member, the first driving portion is separated from the abutment member, and the sleeve is reset toward the proximal side under the action of the first reset member, thereby opening the jaw assembly.

[0016] In some embodiments, in response to the wrench moving from the closed position to the open position, the first drive portion pushes the abutment member from the distal side to cause the abutment member to move relative to the sliding member, thereby causing the first drive portion to pass over the abutment member and reach the proximal side of the abutment member, thereby resetting the wrench to the open position.

[0017] In some embodiments, the wrench is further provided with a second driving portion; in response to the wrench moving from the open position to the intermediate position, the second driving portion drives the clamp feeding driving mechanism to move to push the clamp in the clamp magazine into the jaw assembly, and the first driving portion pushes the abutment member to move distally, so that the sliding member pushes the sleeve to move distally, so that the jaw assembly is partially closed.

[0018] In some embodiments, the clamp delivery drive mechanism includes a clamp delivery assembly and a clamp delivery drive tube that are connected to each other. In response to the wrench moving from the open position to the intermediate position, the second drive unit drives the clamp delivery drive tube to move distally, thereby causing the clamp delivery assembly to move distally, so that the clamp delivery assembly pushes the clamp in the clamp magazine into the jaw assembly.

[0019] In some embodiments, the wrench is further provided with a second driving portion; in response to the wrench moving from the intermediate position to the closed position, the second driving portion drives the sleeve to move distally to close the jaw assembly.

[0020] In some embodiments, the jaw drive mechanism also includes a jaw drive tube, which is connected to the sleeve. In response to the wrench moving from the middle position to the closed position, the second drive portion drives the jaw drive tube to move distally, thereby causing the sleeve to move distally to close the jaw assembly.

[0021] In some embodiments, the wrench is rotatably connected to the handle housing; and the sliding member moves linearly along the axial direction relative to the handle housing.

[0022] In some embodiments, the clamp further includes a pressure plate and a guide pin, wherein the guide pin connects the pressure plate to the inner wall of the handle housing; the sliding member is disposed between the pressure plate and the inner wall of the handle housing, and the guide pin is slidably matched with the sliding member to guide the sliding member to move linearly along the axial direction.

[0023] In some embodiments, the abutment is rotatably connected to the sliding member, and in response to the wrench moving from the open position toward the closed position, the first driving portion pushes the abutment from the proximal side, and the abutment abuts against the sliding member, so that the sliding member moves distally, thereby causing the sleeve to move distally to partially close the jaw assembly, and then the first driving portion passes over the abutment and moves to the distal side of the abutment;

[0024] In response to the wrench moving from the closed position toward the open position, the first drive portion pushes the abutment member from the distal side, and the abutment member rotates to the avoidance position relative to the sliding member, thereby resetting the wrench to the open position, and the sleeve moves proximally to open the jaw assembly.

[0025] In some embodiments, the auxiliary drive mechanism further comprises a biasing member, wherein the biasing member biases the abutting member toward the sliding member so that the abutting member abuts against a proximal end of the sliding member.

[0026] In some embodiments, the abutment member is linearly movable relative to the sliding member, a proximal side of the abutment member is provided with an abutment plane, and a distal side of the abutment member is provided with an inclined portion;

[0027] In response to the wrench moving from the open position toward the closed position, the first driving portion pushes against the abutment plane, so that the abutment member pushes the sliding member to move distally, thereby causing the sleeve to move distally to partially close the jaw assembly, and then the first driving portion passes over the abutment member and moves to the distal side of the abutment member;

[0028] In response to the wrench moving from the closed position toward the open position, the first driving portion pushes the inclined portion, and the abutment member moves linearly to the avoidance position relative to the sliding member, thereby resetting the wrench to the open position, and the sleeve moves proximally to open the jaw assembly.

[0029] In some embodiments, the sliding member moves linearly along the axial direction relative to the handle housing, and the abutment member moves relative to the sliding member along a direction forming an angle with the axial direction, wherein the angle includes 90 degrees.

[0030] In some embodiments, the abutting plane is perpendicular to the axial direction; and the inclined portion is inclined from the proximal end to the distal end of the inclined portion toward a direction close to the axial direction of the sleeve.

[0031] In some embodiments, the sliding member is provided with a mounting cavity, and the abutment member is partially accommodated in the mounting cavity;

[0032] The auxiliary drive mechanism also includes an elastic member, which is located in the mounting cavity and arranged between the abutment member and the sliding member. In response to the wrench moving from the closed position toward the open position, the first drive portion pushes the inclined portion, and the abutment member overcomes the biasing force of the elastic member and moves relative to the sliding member. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the clip applier provided in an embodiment of the present disclosure.

[0034] Figure 2A-2B It is a schematic diagram of the structure of the clamping bin provided in an embodiment of the present disclosure.

[0035] Figure 3 It is a schematic diagram of the structure of the clip provided in the embodiment of the present disclosure.

[0036] Figure 4 is a cross-sectional view of a clip applier provided in an embodiment of the present disclosure, wherein the jaw assembly is in an open state.

[0037] Figure 4A for Figure 4Schematic diagram of the structure of the switching mechanism.

[0038] Figure 4B for Figure 4 Schematic diagram of the structure of the matching mechanism.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Figure 6C The partial area of ​​the clip applier provided in the embodiment of the present application is Fig.6D Schematic diagram of the cross-sectional structure from the MM perspective, with the jaw assembly closed.

[0044] Fig.6D The partial area of ​​the clip applier provided in the embodiment of the present application is Figure 6C Schematic diagram of the cross-sectional structure from the LL perspective, with the jaw assembly closed.

[0045] Figure 7 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 handle housing of the clamp is removed.

[0046] Figure 8 It 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 handle housing of the clamp is removed.

[0047] Fig. 9 is a schematic structural diagram of the clamp provided by an embodiment of the present disclosure, wherein the wrench is in a closed position and a portion of the handle housing of the clamp is removed.

[0048] Fig.10It is a schematic diagram of the structure of the guide pivot member provided in a specific embodiment of the present disclosure.

[0049] Fig.11 It is a schematic structural diagram of the guide pivot member from another angle provided in a specific embodiment of the present disclosure.

[0050] Fig.12 It is a schematic diagram of the structure of the guide channel provided in the specific embodiment of the present disclosure.

[0051] Fig.13 It is a schematic structural diagram of a clip applier with an auxiliary drive mechanism according to another embodiment of the present disclosure, in which a portion of the handle housing of the clip applier is removed and the jaw assembly is in an initial open state.

[0052] Fig.14 for Fig.13 Enlarged view of point A in the middle.

[0053] Fig.15 It is a schematic structural diagram of a sliding member in a clip applier according to another embodiment of the present disclosure.

[0054] Fig.16 for Fig.15 Exploded view of the slide shown.

[0055] Fig.16A for Fig.15 A schematic structural diagram of the sliding member shown in another angle.

[0056] Fig. 16B for Fig.15 A schematic structural diagram of the sliding member shown in another angle.

[0057] Fig.17 This is a schematic diagram of the cooperation relationship between the sliding member and the handle housing when the jaw assembly of the clip applier according to another embodiment of the present disclosure is in an initial open state.

[0058] Fig.18 for Fig.17 Enlarged view of point B in the middle.

[0059] Fig.19 This is a schematic diagram of the cooperation relationship between the sliding member and the wrench when the jaw assembly of the clamping forceps according to another embodiment of the present disclosure is in an initial open state.

[0060] Fig. 20 It is a schematic structural diagram of a clip applier according to another embodiment of the present disclosure, in which the jaw assembly is in a partially closed state.

[0061] Fig.21 for Fig. 20 Magnified view of part C.

[0062] Fig. 22This is a schematic diagram of the cooperation relationship between the sliding member and the wrench when the jaw assembly of the clamping forceps according to another embodiment of the present disclosure is in a partially closed state.

[0063] Fig.23 It is a schematic structural diagram of a clip applier according to another embodiment of the present disclosure, wherein the handle is reset to make the jaw assembly open again.

[0064] Fig.24 for Fig.23 Enlarged view of point D in the middle.

[0065] Fig.25 This is a schematic diagram of the cooperation relationship between the sliding member and the wrench when the handle of the clip applier according to another embodiment of the present disclosure is reset to make the jaw assembly in the reopened state.

[0066] Fig.26 To disclose a structural schematic diagram of a clip applier with an auxiliary drive mechanism according to another embodiment, a portion of the handle housing of the clip applier is removed, and the jaw assembly is in an initial open state.

[0067] Fig. 27 for Fig.26 Enlarged view of point E in the middle.

[0068] Fig.28 It is a schematic structural diagram of a sliding member in a clip applier according to another embodiment of the present disclosure.

[0069] Fig.29 for Fig.28 Exploded view of the slide shown.

[0070] Fig.30 This is a schematic diagram of the cooperation relationship between the sliding member and the handle housing when the jaw assembly of the clip applier according to another embodiment of the present disclosure is in an initial open state.

[0071] Fig.31 It is a schematic structural diagram of a clip applier according to yet another embodiment of the present disclosure, in which the jaw assembly of the clip applier is about to begin to partially close.

[0072] Fig.32 for Fig.31 Enlarged view of point F in the middle.

[0073] Fig.33 Schematic diagram of the relationship between the sliding member and the wrench when the jaw assembly of the clamp is about to start to partially close

[0074] Fig.34 It is a schematic structural diagram of a clip applier according to yet another embodiment of the present disclosure, wherein the jaw assembly is in a partially closed state.

[0075] Fig.35 for Fig.34 Magnified view of G in .

[0076] Fig.36 It is a schematic diagram of the cooperation relationship between the sliding member and the wrench when the jaw assembly is in a partially closed state.

[0077] Fig.37 It is a schematic structural diagram of a clip applier according to yet another embodiment of the present disclosure, wherein the handle is reset to allow the jaw assembly to be in an open state again.

[0078] Fig.38 for Fig.37 Enlarged view of point H in the middle.

[0079] Fig.39 It is a schematic diagram of the cooperation relationship between the sliding part and the wrench when the jaw assembly is in the reopened state.

[0080] Reference numerals of the above drawings:

[0081] 1-handle assembly; 2-head handle shell; 3-handle shell; 4-wrench; 401-first drive unit; 402-second drive unit; 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; 22-clip; 23-first clamp arm; 25-first ear; 26-connection 27-second clamp arm; 29-second ear; 30-clamping part; 31-pushing clamp block; 32-jaw drive tube; 33-convex rib; 34-baffle; 35-sleeve; 351-protrusion; 36-first reset member; 37-base; 38-guide groove; 39-guide surface; 40-clip rod; 41-elastic rod; 42-clip block; 43-clip drive tube; 44-groove; 45-third reset member; 46-clip seat; 62-seat body; 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; 70-lower rack; 71-middle member; 72-spring; 73-guide pivot member; 74-bias spring; 75-guide member; 76-pivot portion; 77-force bearing portion; 78-guide portion; 79-stop portion; 80-first rotating arm; 81-second rotating arm, 82-third rotating arm; 83-guide wall; 84-blocking wall; 85-pivot end; 8 6-guide channel; 87-main channel; 88-opening; 89-slave channel; 9-auxiliary drive mechanism; 91-sliding member; 911-resting portion; 912-guide surface; 913-installation cavity; 914-limiting groove; 915-guide groove; 92-resting member; 921-rotating shaft; 922-resting plane; 923-inclined portion; 93-torsion spring; 94-pressure plate; 95-guide pin; 951-first pin; 952-second pin; 96-elastic member; 97-connecting pin. DETAILED DESCRIPTION

[0082] 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.

[0083] 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.

[0084] 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.

[0085] The term “axial direction” as used herein refers to the length direction of the sleeve 35 .

[0086] The clips of the continuous clip applier are in a pre-compressed state when arranged in the clip compartment, in which the clips are partially compressed to reduce the space they occupy; they enter the jaw assembly under the push of the clip delivery drive mechanism and open to the open state in the jaw assembly. Because the clips will creep and reduce elasticity after being compressed in the clip compartment for a long time, the tension may be insufficient when entering the jaw assembly. If the jaw opening angle is large, the clips cannot open well against the jaws (the clips open slowly and the opening angle is small), and the clips are easy to fall off from the jaws, affecting the use of the instrument.

[0087] The present invention aims to provide a clip applier that can solve the technical problem of the instability of the clip caused by insufficient tension when the clip enters the jaw assembly. The technical concept of the present invention is described in detail below in conjunction with the accompanying drawings.

[0088] Please refer to Figures 1 to 4 ,in, Figure 1It 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 cross-sectional view of a clip applier provided in an embodiment of the present disclosure, wherein the jaw assembly is in an open state.

[0089] 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.

[0090] 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. The handle shell 3 and the wrench 4 constitute a handle assembly. The user can grasp the handle shell 3 with one hand and pull the wrench 4 with his fingers, so that the wrench 4 moves relative to the main body, thereby driving the transmission mechanism to move.

[0091] 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. The wrench 4 has an open position (such as Figure 1 The position of the wrench 4 shown), the middle position (such as Figure 8 The position of the wrench 4 shown) and the closed position (as shown Fig. 9 The wrench 4 is shown in the figure). 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, when the wrench 4 is released, the wrench 4 moves in the reverse direction from the closed position to the open position.

[0092] Please refer to 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.

[0093] Please refer to Figure 3 The clamp 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, specifically, 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.

[0094] 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, and the clamp 22 is in a closed state, 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.

[0095] refer to Figure 2A-2B The 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 clip 22 is in a pre-compression state, and the two clamp arms are compressed but not compressed to a closed state, that is, the two clamp arms of the clip 22 are close to each other but not engaged.

[0096] 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. 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 an elastic sheet with the distal end tilted. The distal end of each transverse barb is an inclined terminal 13.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] Combined with reference Figure 1 and Figure 4The transmission mechanism includes a clamp feeding drive mechanism, a jaw driving mechanism and a clamp pushing drive mechanism. In response to the wrench 4 moving from the open position to the middle position, the clamp feeding drive mechanism drives the first clamp to move from the clamp bin 6 to the jaw assembly 14. In response to the wrench moving from the middle position to the closed position, the jaw driving mechanism drives the jaw assembly to close so that the clamp 22 in the jaw assembly is closed. When the wrench 4 is in the closed position, each clamp pushing block is 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, a plurality of clamp pushing blocks 31 move forward to respectively drive the second clamp to the Nth clamp to move forward.

[0101] It should be noted that the descriptions of the specific structures of the clamp feeding drive mechanism and the jaw drive mechanism and the clamp pushing drive mechanism in the following embodiments are merely exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0102] The clip delivery drive mechanism is used to drive the clip 22 into the jaw assembly 14 (clip delivery action), the clip pushing drive mechanism is used to drive other clips in the clip bin 6 to move forward one station (clip pushing action), and the jaw drive mechanism is used to drive the jaw assembly 14 to move. The wrench 4 drives the transmission mechanism to move, thereby driving the clip delivery drive mechanism, the clip pushing drive mechanism and the jaw drive mechanism to move, so that the clip delivery drive mechanism performs the clip delivery action, the clip pushing drive mechanism performs the clip pushing action, and the jaw drive mechanism performs the jaw closing action (clamping action).

[0103] 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 housing of the operating assembly 1. The sleeve 35 is sleeved on the outside of the clamping chamber 6, and the sleeve 35 also constitutes a part of the shaft assembly 5. The proximal end of the sleeve 35 is connected to the jaw drive tube 32, and the distal end of the sleeve 35 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 to close.

[0104] 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.

[0105] The jaw assembly 14 includes a first clamp arm 15 and a second clamp 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 clamp arm 15 and the second clamp arm 16 for opening the jaws, for example, the second reset member is a spring. When the jaw drive tube 32 drives the sleeve 35 to move toward the distal end, the jaw assembly 14 can be at least partially received in the sleeve 35 from the distal end of the sleeve 35 so that the jaw assembly 14 is closed. At this time, the second reset member between the two clamp arms is compressed, and the first reset member 36 is also compressed. When the clamping is completed, under the action of the first reset member 36, the sleeve 35 moves toward the proximal end, the jaw assembly 14 can extend from the distal end of the sleeve 35, and the second reset member releases energy to open the jaw assembly 14.

[0106] 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. 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 inside of the bottom 7, and the inside and the outside refer to the two sides of the plane where the bottom 7 is located.

[0107] 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 14. 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 with 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.

[0108] 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.

[0109] refer to Figure 5A-5B , Figure 6A-6BThe 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.

[0110] refer to Figure 5A-5B , Figure 6A-6B , 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 14.

[0111] After the clip 22 is clamped in the jaw assembly 14, 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 14 is closed to close the clip 22, and then the jaw assembly 14 is opened to disengage the clip 22 from the jaw assembly 14, thus completing the clamping. After the jaw assembly 14 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 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.

[0112] 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.

[0113] 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 each side cavity is provided with a clamping push block 31. Each clamping push block 31 is connected to the clamping push seat 46 by 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 clip 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 and pushes a clip 22 forward respectively, so that the clip 22 moves axially toward the distal end, and the clip 22 smoothly passes through the first transverse barb 11 and the second transverse barb 12, so that the clip 22 enters the adjacent distal station from the current station. As a result, the clamping push seat 46 pushes the other clips (the clips 22 other than the first clip) in the clamping bin 6 to move forward one station. When the clamp push seat 46 retreats axially, the clamp 22 cannot retreat due to the action of the first transverse barb 11 and the second transverse barb 12, so that the clamp push block 31 abuts against the clamp and is squeezed by the clamp 22 to rotate into the side cavity, so that the clamp push block 31 retreats proximally along the side of the clamp 22, avoiding the clamp 22, thereby preventing the clamp push block 31 from retreating with the clamp 22 when retreating.

[0114] 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.

[0115] Specifically, 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:

[0116] refer to Figure 4 , Figure 4A and Figure 4B , Figure 7-Figure 9 The switching mechanism includes a seat body 62, a first clutch member 63, a clutch switching mechanism and a second clutch member 64. The seat body 62 has a first waist-shaped hole and a second waist-shaped hole, and 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 Figure 7 The first clutch member 63 is accommodated in the seat body 62 , and the second clutch member 64 is the distal end surface of the seat body 62 .

[0117] 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.

[0118] 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 head shell 2 of the clamp includes a first head shell and a second head shell (not numbered) arranged along the radial direction of the sleeve 35. The guide rail is symmetrically arranged on the inner wall of the first head shell and the second head shell 2. 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.

[0119] 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.

[0120] The wrench 4 pushes the seat body 62 so that the seat body 62 moves toward the distal end, and the first clutch 63 moves forward accordingly and drives the clamp feeding drive mechanism to move toward the distal end to perform the clamp feeding action. The guide column 65 can move on the guide rail following the movement of the first clutch 63. When the guide column 65 moves on the first guide surface 66, the first clutch 63 and the clamp feeding drive tube 43 remain in a combined state. 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 feeding drive tube 43 and is separated from the clamp feeding drive tube 43.

[0121] When the wrench 4 drives the clip delivery drive mechanism to move toward the distal end, 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 to push the jaw drive tube 32 to move, thereby driving the jaw drive mechanism to move to perform the jaw closing action.

[0122] 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.

[0123] refer to Figure 4 , Figure 7-Figure 9, the matching mechanism includes an upper rack 69, an intermediate piece 71 and a lower rack 70, and the intermediate piece 71 includes a first gear and a second gear. The upper rack 69 is meshed with the first gear, and the lower rack 70 is meshed with the second gear. The first gear and the second gear are coaxially arranged and rotate synchronously. The clip delivery drive pipe is drivably connected to the upper rack 69, and the clip delivery drive pipe and the upper rack 69 move in the same direction. For example, as mentioned above, the seat body 62 is drivably connected to the clip delivery drive pipe, the seat body 62 is connected to the upper rack 69, 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 to the distal side, the lower rack 70 moves to the proximal side. The upper rack 69 and the lower rack 70 are both arranged axially, and the first gear and the second gear are arranged between the upper rack 69 and the lower rack 70. The push-clip driving mechanism further includes a fourth reset member 68, one end of which is connected to the handle housing, and the other end of which is connected to the proximal end of the lower rack 70. For example, the fourth reset member 68 is a spring.

[0124] 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.

[0125] refer to Figure 4 as well as Figures 10 to 12 The 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 through a first rotating shaft, so that the guide pivot 73 rotates relative to the handle housing 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.

[0126] 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.

[0127] One end of the bias spring 74 abuts against the force receiving portion 77, and the other end abuts against the handle housing. 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 clockwise, that is, the stop portion 79 and the guide portion 78 also have a tendency to rotate clockwise (with a rotation angle of 1 / 4000). Figure 4 The angle of placement of the clamp in the middle is used as a reference).

[0128] refer to Fig. 9 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.10 and Fig.11 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.

[0129] refer to Fig.12 The 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.

[0130] 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.

[0131] 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.

[0132] refer to Fig.12 , 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.

[0133] 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.

[0134] refer to Fig.11 and Fig.12 , 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.

[0135] 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. In 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).

[0136] 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.

[0137] The following is a detailed description of the working process of the transmission mechanism of the clamping forceps to perform the clamping action, clamping action, and clamping pushing action:

[0138] When the wrench 4 is in the open position, the 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, so that the switching mechanism moves toward the distal end, and the guide column 65 moves on the first guide surface 66. The first clutch member 63 moves forward with the switching mechanism and drives the clamp feeding drive mechanism to move toward the distal end to perform the clamp feeding action, and 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 member 71. Since the lower rack 70 is connected to the clamp push seat 46, the clamp push seat 46 is driven to retreat, so that the fourth reset member 68 is energized, and the plurality of clamp push blocks 31 move toward the proximal side respectively.

[0139] 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 and lifts upward, 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. 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. 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 , 5BThe 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. 6A For example, the radial direction of the clamping chamber 6 is a direction perpendicular to the drawing.

[0140] When the wrench 4 is in the middle position, the wrench 4 is pressed to move the wrench 4 from the middle position toward the closed position, the backstop mechanism gradually disengages from the clamp feeding drive tube 43, and the switching mechanism continues to push the jaw driving mechanism and the upper rack 69 forward under the action of the wrench 4, while the upper rack 69 continues to drive the lower rack 70 backward through the intermediate member 71. Since the lower rack 70 is connected to the 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 Fig. 6C and Fig. 6D, each clamp pushing block 31 moves proximally to the rear side of the second clamp to the Nth clamp, and still taking the clamp pushing block 31 located at the front side of the second clamp when the wrench 4 is in the open position as an example, the clamp pushing 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 clamp pushing 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 clamp pushing action is completed).

[0141] Because the clip will creep and its elasticity decrease after being compressed in the clamp chamber for a long time, the tension may be insufficient when entering the jaw assembly. If the jaws are opened at a large angle, the clip cannot open well and press against the jaws, causing the clip to move unstably in the jaw assembly. The clip may twist or even fall off the jaw assembly, affecting the use of the clamp.

[0142] To solve the above problems, refer to Figures 13 to 21 The clip applier of another embodiment of the present disclosure further includes an auxiliary drive mechanism 9. In response to the wrench 4 moving from the open position to the intermediate position, the clip delivery drive mechanism drives the clip 22 from the clip cartridge 6 into the jaw assembly 14, and the auxiliary drive mechanism 9 pushes the sleeve 35 to move distally, so that the jaw assembly 14 is partially closed while the clip 22 enters the jaw assembly 14.

[0143] That is, the auxiliary drive mechanism 9 is constructed such that when the wrench 4 completes the clamp feeding action, the sleeve 35 is moved distally through the auxiliary drive mechanism 9 to partially close the jaw assembly 14. Thus, the clip 22 can be ensured to abut against the jaw assembly 14 during the process of entering the jaw assembly 14, that is, the first clamp arm 23 and the second clamp arm 27 of the clip 22 abut against the first clamp arm 15 and the second clamp arm 16 respectively, and move along the first clamp arm 15 and the second clamp arm 16, so that the clip can stably move forward in the jaw assembly even when the opening amplitude is small.

[0144] The following is a detailed description of a specific embodiment of the auxiliary drive mechanism 9. However, it should be noted that the description of the specific structure of the auxiliary drive mechanism 9 in the following embodiment is only exemplary and intended to be used to explain the present disclosure, and cannot be understood as limiting the present disclosure.

[0145] refer to Figures 13 to 16 The auxiliary driving mechanism 9 includes a sliding member 91 and an abutting member 92 , and the abutting member 92 is movably connected to the sliding member 91 . The sliding member 91 is movably arranged on the handle housing 3 .

[0146] The sliding member 91 moves distally to enable the sleeve 35 to move distally. For example, a distal end of the sliding member 91 is provided with a butting portion 911. The butting portion 911 is used to axially butt against the sleeve 35, thereby pushing the sleeve 35 to move distally along the axial direction of the sleeve 35. The butting portion 911 is configured to, for example, butt against a protrusion 351 on the outer wall of the sleeve 35.

[0147] refer to Fig.19 The wrench 4 includes a first driving part 401, which is used to drive the auxiliary driving mechanism 9, so that when the wrench 4 completes the clamp feeding action, the sleeve 35 is moved distally through the auxiliary driving mechanism 9 to partially close the jaw assembly 14. The wrench 4 also includes a second driving part 402, which is used to abut the seat body 62, and then sequentially drives the clamp feeding driving mechanism to perform the clamp feeding action, drives the jaw driving mechanism to perform the jaw closing action, and drives the clamp pushing driving mechanism to perform the clamp pushing action. The working principle is described in detail above.

[0148] In the embodiment of the present disclosure, when the wrench 4 is in the open position, in response to the force applied to the wrench 4 to move the wrench 4 from the open position to the middle position, the first drive portion 401 pushes the abutment 92 to move distally, and then drives the sliding member 91 to move distally and abut against the sleeve 35, so that the sliding member 91 pushes the sleeve 35 to move distally, thereby achieving that when the clamp 22 enters the jaw assembly 14 from the clamp magazine 6, the sleeve 35 partially closes the jaw assembly at the same time.

[0149] During the movement of the wrench 4 from the open position to the closed position, in response to the rotation of the wrench 4, the first drive portion 401 pushes the abutment 92 from the proximal side toward the distal side, so that the sliding member 91 pushes the sleeve 35 toward the distal side, thereby partially closing the jaw assembly; in response to the continued rotation of the wrench 4, the first drive portion 401 passes over the abutment 92 and moves to the distal side of the abutment 92, and the first drive portion 401 is separated from the abutment 92.

[0150] The following is a detailed explanation. Fig.13 , Fig.14 , Figures 17 to 19 When the wrench 4 is in the open position, the jaw assembly 14 is in the open state. The open state here is defined as the initial open state. Combined with the above description, it can be seen that at this time, the frontmost clip in the clip compartment 6 has not been pushed into the jaw assembly 14. The first driving part 401 is located on one side of the proximal end of the abutment member 92, but has not yet abutted against the abutment member 92.

[0151] refer to Figure 20 to Figure 22 In response to the force applied to the wrench 4, the wrench 4 moves from the open position to the middle position; during the process of the first driving part 401 following the rotation of the wrench 4, the first driving part 401 gradually moves to the proximal side of the abutment 92, and then pushes the abutment 92 to move distally. When the abutment 92 moves distally, it drives the sliding member 91 to move distally. When the sliding member 91 moves distally, the abutment part 911 at the distal end of the sliding member 91 pushes the sleeve 35 to move distally, so that the jaw assembly 14 is partially closed, as shown in FIG. Fig. 20 As shown, the jaw assembly 14 is in a partially closed condition.

[0152] When the wrench 4 moves from the open position to the middle position, the second driving part 402 acts on the clip delivery driving mechanism, so that the clip delivery driving mechanism pushes the frontmost clip 22 in the clip bin 6 into the jaw assembly 14. For example, the second driving part 402 is connected to the clip delivery driving mechanism by abutting against the seat body 62.

[0153] In the present disclosure, the partially closed state of the jaw assembly 14 is a state between the initial open state and the closed state. Compared with the initial open state, in the partially closed state, the space in the jaw assembly 14 is reduced, so that the clip 22 can move stably in the jaw assembly.

[0154] In the clamp applicator of the present disclosure, when the wrench 4 completes the clamp delivery action, the sleeve 35 is also moved to partially close the jaw assembly 14 through the auxiliary drive mechanism 9. Under this premise, when the wrench 4 completes the clamp delivery action, the first drive part 401 abuts against the proximal end of the abutment member 92 and the second drive part 402 acts on the clamp delivery drive mechanism, which occur simultaneously. The jaw assembly 14 is partially closed and the clip enters the jaw assembly 14 by rotating the wrench 4 from the open position toward the middle position. The synchronization and stability of the two actions of the jaw assembly 14 partially closing and the clip 22 entering the jaw assembly 14 are good.

[0155] In other embodiments of the present disclosure, when the wrench 4 completes the clamping action, the first drive part 401 abuts against the proximal end of the abutment member 92 and the second drive part 402 acts on the clamping drive mechanism, and these two actions may occur successively. For example, the first drive part 401 may first abut against the proximal end of the abutment member 92, and then the second drive part 402 acts on the clamping drive mechanism. For example, in specific settings, different abutment sequences can be achieved by adjusting the rotation radius of the first drive part 401 and the second drive part 402 according to the specific conditions of the initial positions of the abutment member 92 and the seat body 62.

[0156] refer to Figure 20 to Figure 22 After the wrench 4 has partially closed the jaw assembly 14, the wrench 4 continues to rotate, and the first driving portion 401 slides along the proximal end of the abutment 92 and passes over the abutment 92 to reach the distal side of the abutment 92. At this time, the first driving portion 401 is separated from the abutment 92.

[0157] Under the action of the first resetting member 36, the sleeve 35 is relocated to its initial position toward the proximal side. After the sleeve 35 is relocated, the jaw assembly 14 is in a re-opened state. In the re-opened state, the jaw assembly 14 has a clamp 22. This facilitates the doctor to place the blood vessel in the jaw assembly 14 and adjust it to a suitable position for the next clamping action. During the relocation process of the sleeve 35, the sleeve 35 pushes the sliding member 91 to move toward the proximal side, thereby relocating the auxiliary drive mechanism 9 to the initial position.

[0158] In some embodiments, during the process of the wrench 4 moving from the open position to the middle position, in response to the rotation of the wrench 4, the first driving portion 401 first pushes the abutment 92 to move, so that the abutment 92 drives the sliding member 91 to move distally along the axial direction of the sleeve 35, so that the jaws are partially closed, and the wrench 4 continues to rotate, and the first driving portion 401 is located distal to the abutment 92 and is separated from the abutment 92. The sleeve 35 is reset proximally under the action of the first reset member 36 to open the jaws again. For example, when the wrench 4 moves to the middle position, the first driving portion 401 of the wrench 4 is separated from the abutment 92, so that the sleeve 35 is reset proximally under the action of the first reset member to open the jaws. At this time, the wrench 4 can stay in the middle position, as described above, which is convenient for the doctor to place the blood vessel in the jaw assembly 14 and adjust it to a suitable position for the next clamping action.

[0159] In response to the wrench 4 moving from the intermediate position to the closed position, reference Figure 8 , the second driving part 402 is still in contact with the seat body 62, the second clutch member 64 is in contact with the proximal end surface of the jaw driving tube 32 to push the jaw driving tube 32 to move, and the jaw driving tube 32 pushes the sleeve 35 to move, so that the jaw assembly 14 is completely closed and the clamping action is completed. This working process can be referred to the above description and will not be repeated here.

[0160] In some embodiments, when the wrench 4 completes the clamping action, the first driving portion 401 of the wrench 4 and the auxiliary driving mechanism 9 have also been axially separated, that is, the first driving portion 401 has passed the abutment 92 to reach the far side of the abutment 92. For example, the first driving portion 401 of the wrench 4 and the abutment 92 may be separated slightly earlier than the clamping action is completed; or, the axial separation of the wrench 4 and the auxiliary driving mechanism 9 and the completion of the clamping action of the wrench 4 occur simultaneously.

[0161] In some embodiments, when the wrench 4 is in the closed position, in response to the withdrawal of the force applied to the wrench 4, the wrench 4 moves from the closed position to the open position, and the auxiliary drive mechanism 9 avoids the wrench 4 so that the wrench 4 can be reset to the open position.

[0162] refer to Fig. 9 , Figure 23 to Figure 25, after the clamping action is completed, the wrench 4 is located in the closed position, and the first drive part 401 is located on the far side of the abutment 92. When the wrench 4 is released, the first drive part 401 will move toward the proximal side, and the first drive part 401 pushes the abutment 92 of the auxiliary drive mechanism 9 to move relative to the sliding member 91, so that the abutment 92 moves to the avoidance position to avoid the first drive part 401, so that the wrench 4 can be reset to the open position. The avoidance position does not refer to a fixed position, but refers to when the abutment 92 moves relative to the sliding member 91 and reaches this position, the abutment 92 is no longer on the movement path of the first drive part 401, and will not block the movement of the first drive part 401, so that the wrench 4 can be reset smoothly.

[0163] For example, when the wrench 4 is reset from the closed position to the open position, the first drive portion 401 abuts against the distal side of the abutment 92, and the abutment 92 is subjected to a force along the axial direction of the sleeve 35 and toward the proximal side. The abutment 92 moves relative to the sliding member 91, so that the first drive portion 401 passes over the abutment 92 and reaches the proximal side of the abutment 92, so that the wrench 4 can be reset to the open position to perform the next clamping action.

[0164] In some embodiments, the wrench 4 is configured to be rotatably connected to the handle housing 3; the sliding member 91 moves linearly along the axial direction of the sleeve 35 relative to the handle housing 3. By converting the rotation of the wrench 4 into the linear movement of the auxiliary jaw drive mechanism 9, the movement direction of the sliding member 91 is the same as the movement direction of the sleeve, so that the sleeve 35 can be pushed more stably, thereby achieving partial closure of the jaw assembly 14.

[0165] refer to Figures 15 to 18 The clip applier further includes a pressing plate 94 and a guide pin 95, wherein the guide pin 95 connects the pressing plate 94 to the inner wall of the handle housing 3. The sliding member 91 is disposed between the pressing plate 94 and the inner wall of the handle housing 3, and the sliding member 91 and the guide pin 95 are relatively slidably matched to guide the sliding member 91 to move linearly in the axial direction. Thus, the sliding member 91 can be relatively movably disposed on the handle housing 3; the pressing plate 94 prevents the sliding member 91 from moving in the radial direction of the sleeve 35.

[0166] The guide pin 95 includes a first pin 951 and a second pin 952, wherein the first pin 951 and the second pin 952 are located on both sides of the sliding member 91, and a guide channel is formed between the first pin 951 and the second pin 952. A guide surface 912 that slidably cooperates with the first pin 951 is also provided on one side of the sliding member 91.

[0167] In some embodiments, the abutment 92 is rotatably connected to the sliding member 91. In response to the movement of the wrench 4 from the open position toward the closed position, the first drive portion 401 pushes the abutment 92 from the proximal side, so that the sliding member 91 pushes the sleeve 35 to move distally to partially close the jaw assembly; in response to the movement of the wrench 4 from the closed position toward the open position, the first drive portion 401 pushes the abutment 92 from the distal side, and the abutment 92 rotates to the avoidance position relative to the sliding member 91, and the abutment 92 avoids the first drive portion 401, so that the wrench 4 is reset to the open position.

[0168] In response to applying force to the wrench 4 to move the wrench 4 from the open position to the closed position, for example, in the process of the wrench 4 moving from the open position to the intermediate position, the first driving part 401 pushes the abutment member 92 from the proximal side, and the abutment member 92 is subjected to a force along the axial direction of the sleeve 35 and toward the distal side, and the abutment member 92 abuts against the proximal end of the sliding member 91, thereby pushing the sliding member 91 to move toward the distal side;

[0169] In response to the withdrawal of the force applied to the wrench 4 so that the wrench moves from the closed position to the open position, the first drive portion 401 pushes the abutment 92 from the distal side. When the abutment 92 is subjected to the force along the axial direction of the sleeve 35 and toward the proximal side, the abutment 92 rotates relative to the sliding member 91 to reach the avoidance position, so that the first drive portion 401 can pass over the abutment 92 and reach the proximal side of the abutment, so that the wrench 4 can be reset to the open position to perform the next clamping action.

[0170] The auxiliary drive mechanism 9 further includes a biasing member, which biases the abutting member 92 toward the sliding member 91 so that the abutting member 92 abuts against the sliding member 91. For example, the biasing member is a torsion spring 93, which is disposed between the abutting member 92 and the sliding member 91, and the torsion spring 93 applies force to make the abutting member 92 tend to abut against the proximal end of the sliding member 91. The abutting member 92 is rotatably mounted on the proximal end of the sliding member 91, for example, via a rotating shaft 921. The torsion spring 93 is sleeved on the rotating shaft 921 of the abutting member 92.

[0171] In some embodiments, the first driving part 401 is a cylinder, and the outer wall of the cylinder is an arc surface, and when the first driving part 401 pushes against the abutment member 92 and slides on the abutment member 92, the setting of the arc surface facilitates the separation of the first driving part 401 from the abutment member 92.

[0172] The working process of the clip applier will be described below in conjunction with an embodiment.

[0173] refer to Fig.13 , Fig.14 , Fig.18 and Fig.19 When the wrench 4 is in the open position, the jaw assembly 14 is in the open state. The first driving portion 401 is located at one side of the proximal end of the abutment member 92 , but has not yet abutted against the abutment member 92 .

[0174] refer to Figure 20 to Figure 22 , the wrench 4 moves from the open position toward the middle position. As the first driving portion 401 follows the rotation of the wrench 4, the first driving portion 401 gradually moves to abut against the proximal end of the abutment 92, and then pushes the abutment 92 to move distally, and the first driving portion 401 slides at the proximal end of the abutment 92 as the wrench rotates. When the abutment 92 moves distally, it drives the sliding member 91 to move distally. When the sliding member 91 moves distally, the abutment portion 911 at the distal end of the sliding member 91 pushes the sleeve 35 to move distally, thereby partially closing the jaw assembly 14. At the same time, the second driving portion 402 drives the clamp feeding drive mechanism to move, pushing the clamp 22 into the jaw assembly 14.

[0175] When the wrench 4 is in the middle position, the first driving portion 401 has passed over the abutment 92 and is separated from the abutment 92, and the first driving portion 401 moves to the distal side of the abutment 92; the sleeve 35 is reset to its initial position under the action of the first reset member 36, and the jaw assembly 14 is opened again. At this time, the doctor can place the blood vessel in the jaw assembly 14 and adjust it to a suitable position for the next step.

[0176] refer to Figure 4 , Figures 8 to 9 , continue to rotate the wrench 4 to move the wrench from the middle position toward the closed position, the second driving part 402 of the wrench 4 drives the seat body 62, the seat body 62 drives the jaw driving tube 32 to move distally, the jaw driving tube 32 pushes the sleeve 35 to move and close the jaw assembly 14, thereby completing the clamping action.

[0177] Please still refer to Figure 23 to Figure 25 After the clamping action is completed, the wrench 4 is released, and the wrench 4 moves from the closed position toward the open position, and the first driving part 401 moves toward the proximal side. The first driving part 401 pushes the abutment 92 from the distal side. When the abutment 92 is subjected to the axial force of the sleeve 35 and toward the proximal side, the abutment 92 overcomes the elastic force of the torsion spring 93 and rotates relative to the sliding part 91, so that the first driving part 401 can pass over the abutment 92 and reach the proximal side of the abutment, so that the wrench 4 can be reset to the open position to perform the next clamping action.

[0178] As described above, the clamping forceps of the disclosed embodiment can realize that the clamp 22 is pushed into the jaw assembly 14 while the jaw assembly 14 is partially closed by providing the auxiliary driving mechanism 9, so that the clamp 22 can stably move in the jaw assembly 14 to prevent the clamp from falling off.

[0179] refer to Figure 26 to Figure 29 In a clamp according to yet another embodiment of the present disclosure, another implementation of the auxiliary drive mechanism 9 is provided.

[0180] In some embodiments of the present disclosure, the abutment 92 moves linearly relative to the sliding member 91, and a proximal side of the abutment 92 is provided with an abutment plane 922, and a distal side of the abutment is provided with an inclined portion 923; in response to the movement of the wrench 4 from the open position toward the closed position, the first drive portion 401 pushes the abutment plane 922 from the proximal side to move the abutment 92 toward the distal side, and the abutment 92 pushes the sliding member 91 to move distally, thereby causing the sleeve 35 to move distally to partially close the jaw assembly; in response to the movement of the wrench 4 from the closed position toward the open position, the first drive portion 401 abuts the inclined portion 923 from the distal side to cause the abutment to move linearly relative to the sliding member 91 to a avoidance position.

[0181] When the wrench 4 moves from the open position to the closed position, the abutment member 92 abuts against the first drive portion 401 along the axial direction of the sleeve 35; and when the wrench 4 is reset from the closed position to the open position, the abutment member 92 avoids the first drive portion 401 of the wrench 4.

[0182] The following is a detailed introduction.

[0183] refer to Figures 26 to 30 When the wrench 4 is in the open position, the jaw assembly 14 is in the initial open state. The frontmost clip 22 in the clip compartment 6 has not yet been pushed into the jaw assembly 14. At this time, the first driving portion 401 is located near the abutment member 92, but has not yet abutted against the abutment plane 922 of the abutment member 92.

[0184] In some embodiments of the present disclosure, reference Figure 31 to Figure 33 In response to the force applied to the wrench 4 to move the wrench 4 from the open position to the middle position, the first driving part 401 will rotate with the wrench 4 and gradually approach the abutment plane 922. The first driving part 401 pushes the abutment member 92, and the abutment member 92 drives the sliding member 91 to move distally, and the sliding member 91 pushes the sleeve to move distally, so that the jaw assembly 14 is partially closed. In this process, in response to the rotation of the handle 4, the first driving part 401 always abuts against the abutment plane 922 and slides along the abutment plane 922. Fig.33 , indicating that when the jaw assembly 14 is in a partially closed state, the first driving portion 401 abuts against the abutting plane 922.

[0185] In response to the wrench continuing to rotate, the first driving portion 401 gradually leaves the abutting plane 922, referring to Figure 34 to Figure 36, the first driving portion 401 is about to disengage from the abutment plane 922 of the abutment piece 92; when the first driving portion 401 of the wrench 4 moves to disengage from the abutment piece 92, that is, the first driving portion 401 and the abutment piece 92 are separated axially from the sleeve 35, the sleeve 35 is reset under the action of the first elastic member 36, and the jaw assembly 14 is in a reopened state. In the reopened state, the clamp 22 has entered the jaw assembly 14, which is convenient for the doctor to place the blood vessel in the jaw assembly 14 and adjust it to a suitable position for the next clamping action. For example, at this time, the wrench 4 is in the middle position, and as described above, the wrench 4 can be maintained in the middle position.

[0186] When the clamping is completed, the wrench 4 is in the closed position, and the first driving portion 401 is located on the far side of the abutment 92. At this time, in response to the withdrawal of the force applied to the wrench 4, the first driving portion 401 moves toward the proximal side and abuts against the inclined portion 923. The first driving portion 40 causes the abutment 92 to move relative to the sliding member 91, so that the first driving portion 401 moves along the inclined portion and passes over the abutment 92, and the wrench 4 is reset to the open position.

[0187] In the clamping pliers of the disclosed embodiment, during the process of completing the clamp feeding action, the wrench 4 moves the sleeve 35 through the auxiliary driving mechanism 9 to partially close the jaw assembly 14, so that the clamp 22 can be pushed into the jaw assembly 14 and the jaw assembly 14 is partially closed, so that the clamp 22 can stably abut against the jaw assembly 14 and will not fall off.

[0188] In some embodiments, reference Figure 27 to Figure 29 The sliding member 91 moves linearly along the axial direction of the sleeve 35 relative to the handle housing 3, and the abutting member 92 moves relative to the sliding member 91 in a direction that is angled with the axial direction of the sleeve, and the angle includes 90 degrees. For example, the abutting plane 922 is perpendicular to the axial direction, and the inclined surface 923 is inclined relative to the axial direction of the sleeve 35, and the inclined surface 923 is inclined from the proximal end to the distal end toward the direction close to the axial direction of the sleeve.

[0189] The abutting plane 922 is perpendicular to the axial direction of the sleeve 35, and when the first driving part 401 abuts against the abutting plane 922, the abutting plane provides a stable force-bearing surface. The inclined surface 923 is inclined relative to the axial direction of the sleeve 35, so that after the clamping action is completed and the wrench 4 is released, the inclined surface 923 guides the movement of the first driving part 401, so that the first driving part 401 can pass over the abutting member 92 more smoothly and move to the proximal side.

[0190] The slide 91 has a guide groove 915 along the axial direction of the sleeve 95. The clip applier further includes a pressure plate 94 and a guide pin 95, wherein the guide pin 95 connects the pressure plate 94 and the handle housing 3 and penetrates the guide groove 915, so that the slide 91 is movably disposed on the handle housing 35 along the axial direction of the sleeve 35.

[0191] In some embodiments, reference Figure 27 to Figure 29 , the sliding member is provided with a mounting cavity 913. The abutting member 92 is partially accommodated in the mounting cavity 913. The auxiliary driving mechanism 9 further comprises an elastic member 96, which is located in the mounting cavity and is arranged between the abutting member 92 and the sliding member 91. In response to the first driving part 401 pushing the inclined surface part 923, the abutting member 92 applies force to the inclined surface part 923, and the abutting member 92 overcomes the elastic force of the elastic member 96 and moves relative to the mounting cavity 913 of the sliding member 91, so that the first driving part 401 passes over the abutting member 91 to achieve reset. The elastic member 96 is, for example, a spring.

[0192] The auxiliary drive mechanism 9 also includes a limiting groove 914 and a connecting pin 97. For example, the limiting groove 914 is provided in the installation cavity 913, and the connecting pin 97 is connected to the abutment member 92 and slides with the limiting groove 914. The limiting groove 914 extends along the moving direction of the abutment member 91, and the connecting pin 97 extends into the limiting groove 914. When the abutment member 92 moves relative to the sliding member 91, the connecting pin 97 slides with the limiting groove 914 to constrain the movement trajectory of the abutment member 92. In addition, the abutment member 92 is partially accommodated in the installation cavity 913. When the abutment member 92 moves relative to the sliding member 91, the abutment member 91 slides with the inner wall of the installation cavity 913, so that the movement of the abutment member 92 is more stable.

[0193] Of course, the abutment member 92 is not limited to the above-mentioned method for being movably connected to the sliding member 91. In other embodiments, the abutment member 92 can be directly connected to the sliding member 91 through the elastic member 96. For example, the connection between the abutment member 92 and the sliding member 91 can be achieved by connecting one end of the elastic member 96 to the abutment member 92 and the other end of the elastic member 96 to the sliding member 91.

[0194] In summary, by providing the auxiliary drive mechanism 9, the wrench 4 moves the sleeve 35 distally through the auxiliary drive mechanism 9 to partially close the jaw assembly 14 during the clamp feeding action. Thus, the clip 22 can be ensured to abut against the jaw assembly 14 during the process of entering the jaw assembly 14, that is, the first clamp arm 23 and the second clamp arm 27 of the clip 22 abut against the first clamp arm 15 and the second clamp arm 16 respectively, and move along the first clamp arm 15 and the second clamp arm 16, so that the clip can also stably move forward in the jaw assembly when the opening amplitude is small, thereby preventing the clip from being twisted or falling off from the jaw.

[0195] 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.

[0196] 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: It includes a jaw assembly, a clamping chamber, a handle assembly, a clamp feeding drive mechanism, a jaw drive mechanism and an auxiliary drive mechanism; The handle assembly comprises a handle housing and a wrench movably connected to the handle housing, the wrench having an open position, an intermediate position and a closed position, and the wrench is provided with a first driving portion; The auxiliary driving mechanism comprises a sliding member and an abutment member, wherein the abutment member is movably connected to the sliding member; The clip compartment is connected to the handle housing, and the clip compartment includes a clip, and the clip is in a pre-compressed state; The jaw drive mechanism includes a sleeve configured to move axially and distally to close the jaw assembly; In response to the wrench moving from the open position to the intermediate position, the clip delivery drive mechanism drives the clip from the clip magazine into the jaw assembly, and the first drive portion pushes the abutment member to move distally, so that the sliding member pushes the sleeve to move distally, thereby partially closing the jaw assembly; In response to movement of the wrench from the intermediate position to the closed position, the sleeve moves distally to close the jaw assembly; In response to the spanner moving from the closed position to the open position, the first driving portion pushes the abutment member to move relative to the sliding member so that the abutment member moves to an escape position, so that the spanner is reset to the open position.

2. The clip applier according to claim 1, wherein: During the process of the wrench moving from the open position to the closed position, in response to the rotation of the wrench, the first driving portion pushes the abutment member from the proximal side to move toward the distal side, so that the sliding member pushes the sleeve to move toward the distal side, thereby partially closing the jaw assembly; in response to the wrench continuing to rotate, the first driving portion passes over the abutment member and moves to the distal side of the abutment member, and the first driving portion is separated from the abutment member.

3. The clip applier according to claim 2, wherein: The jaw drive mechanism includes a first return member that biases the sleeve proximally to open the jaw assembly.

4. The clip applier according to claim 3, wherein: When the wrench is located at the middle position, the first driving portion is located at the distal side of the abutment member, the first driving portion is separated from the abutment member, and the sleeve is reset toward the proximal side under the action of the first reset member, thereby opening the jaw assembly.

5. The clip applier according to claim 1, wherein: In response to the wrench moving from the closed position to the open position, the first drive portion pushes the abutment member from the distal side to cause the abutment member to move relative to the sliding member, thereby causing the first drive portion to pass over the abutment member and reach the proximal side of the abutment member, thereby resetting the wrench to the open position.

6. The clip applier according to claim 1, wherein: The wrench is also provided with a second driving part; in response to the wrench moving from the open position to the intermediate position, the second driving part drives the clamp feeding driving mechanism to move to push the clamp in the clamp magazine into the jaw assembly, and the first driving part pushes the abutment member to move distally, so that the sliding member pushes the sleeve to move distally, so that the jaw assembly is partially closed.

7. The clip applier according to claim 6, wherein: The clamp delivery drive mechanism includes a clamp delivery assembly and a clamp delivery drive tube connected to each other. In response to the wrench moving from the open position to the intermediate position, the second drive unit drives the clamp delivery drive tube to move distally, thereby causing the clamp delivery assembly to move distally, so that the clamp delivery assembly pushes the clamp in the clamp magazine into the jaw assembly.

8. The clip applier according to claim 1, wherein: The wrench is further provided with a second driving portion; in response to the wrench moving from the intermediate position to the closed position, the second driving portion drives the sleeve to move distally to close the jaw assembly.

9. The clip applier according to claim 8, wherein: The jaw drive mechanism also includes a jaw drive tube, which is connected to the sleeve. In response to the wrench moving from the middle position to the closed position, the second drive part drives the jaw drive tube to move distally, thereby causing the sleeve to move distally to close the jaw assembly.

10. The clip applier according to claim 1, wherein: The wrench is rotatably connected to the handle housing; the sliding member moves linearly along the axial direction relative to the handle housing.

11. The clip applier according to claim 10, wherein: The clamp also includes a pressure plate and a guide pin, wherein the guide pin connects the pressure plate to the inner wall of the handle shell; the sliding member is arranged between the pressure plate and the inner wall of the handle shell, and the guide pin is slidably matched with the sliding member to guide the sliding member to move linearly along the axial direction.

12. The clip applier according to claim 1, wherein: The abutment is rotatably connected to the sliding member. In response to the wrench moving from the open position toward the closed position, the first driving portion pushes the abutment from the proximal side, and the abutment abuts against the sliding member, so that the sliding member moves distally, thereby causing the sleeve to move distally to partially close the jaw assembly, and then the first driving portion passes over the abutment and moves to the distal side of the abutment; In response to the wrench moving from the closed position toward the open position, the first drive portion pushes the abutment member from the distal side, and the abutment member rotates to the avoidance position relative to the sliding member, thereby resetting the wrench to the open position, and the sleeve moves proximally to open the jaw assembly.

13. The clip applier according to claim 12, wherein: The auxiliary drive mechanism further includes a biasing member that biases the abutment member toward the slider so that the abutment member abuts against a proximal end of the slider.

14. The clip applier according to claim 1, wherein: The abutment member can move linearly relative to the sliding member, a proximal side of the abutment member is provided with an abutment plane, and a distal side of the abutment member is provided with an inclined portion; In response to the wrench moving from the open position toward the closed position, the first driving portion pushes against the abutment plane, so that the abutment member pushes the sliding member to move distally, thereby causing the sleeve to move distally to partially close the jaw assembly, and then the first driving portion passes over the abutment member and moves to the distal side of the abutment member; In response to the wrench moving from the closed position toward the open position, the first driving portion pushes the inclined portion, and the abutment member moves linearly to the avoidance position relative to the sliding member, thereby resetting the wrench to the open position, and the sleeve moves proximally to open the jaw assembly.

15. The clip applier according to claim 14, wherein: The sliding member moves linearly along the axial direction relative to the handle housing, and the abutting member moves relative to the sliding member along a direction forming an angle with the axial direction, wherein the angle includes 90 degrees.

16. The clip applier according to claim 15, wherein: The abutting plane is perpendicular to the axial direction; the inclined surface portion is inclined from the proximal end to the distal end of the inclined surface portion toward the direction close to the axial direction of the sleeve.

17. The clip applier of claim 14, wherein: The sliding member is provided with an installation cavity, and the abutment member is partially accommodated in the installation cavity; the auxiliary driving mechanism also includes an elastic member, which is located in the installation cavity and is arranged between the abutment member and the sliding member. In response to the movement of the wrench from the closed position toward the open position, the first driving part pushes the inclined portion, and the abutment member overcomes the biasing force of the elastic member and moves relative to the sliding member.

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