Clip applier

Abstract

The clip applier comprises a shell, a clip body assembly, a clip bin, an end actuator and a non-return assembly, the non-return assembly comprises a non-return rail part, a non-return part and a mounting seat, the mounting seat is connected to a push rod and provided with a mounting hole, and the hole diameter of the mounting hole is gradually increased in the direction away from an extending part; the mounting part is inserted into the mounting hole, so that the non-return piece is rotatably connected to the mounting seat; the non-return part is provided with a first rotating axis and a second rotating axis, the first rotating axis is perpendicular to the second rotating axis, the first rotating axis is parallel to the extending direction of the mounting hole, and the non-return part is configured to rotate around one of the first rotating axis and the second rotating axis so that the matching part can move in the height direction of the non-return rail part; the non-return piece rotates around the other one of the first rotating axis and the second rotating axis so that the matching part can move in the width direction of the non-return rail piece.

Description

TECHNICAL FIELD

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

[0002] During a surgical procedure, it is necessary to ligate and stop bleeding of a severed tissue or blood vessel, and a common method is to apply a clip to the tissue or blood vessel by using a clip applier.

[0003] The clip applier includes a clip cartridge and an end effector, and the clip cartridge stores clips. A complete clip applying process of the clip applier generally includes a clip feeding action and a clip applying action. When the clip applier is used, the clip applier performs the clip feeding action to feed the clip stored in the clip cartridge into the end effector, and then the clip applier performs the clip applying action to drive the end effector to close so that the clip in the end effector is closed to be clamped on the tissue or blood vessel to block blood flow. After the clip applier performs a complete clip applying process, the movement units inside the clip applier need to be reset, and then the clip applier performs the next clip applying process. SUMMARY

[0004] In view of the deficiencies of the prior art, the present disclosure aims to provide a clip applier.

[0005] The present disclosure is implemented by the following technical scheme: a clip applier includes a housing, a jaw assembly, a clip cartridge, an end effector, and a check assembly.

[0006] The clip cartridge is connected to the housing, and the clip cartridge includes a clip.

[0007] The jaw assembly is connected to the housing, and the jaw assembly includes a push rod configured to move distally along an axial direction of the jaw assembly to drive the clip to enter the end effector from the clip cartridge and drive the end effector to close, and the push rod is configured to move proximally along the axial direction of the jaw assembly to reset.

[0008] The check assembly includes a check rail, a check piece, and a mounting seat, and the check piece includes a matching portion, an extension portion, and a mounting portion connected in sequence.

[0009] The check rail is connected to the housing, and the check rail has a guide rail in which the matching portion is configured to move, and a check structure is arranged at the bottom of the guide rail, one side of the check structure has a sliding surface, and the other side of the check structure has an abutting surface.

[0010] The mounting seat is connected to the push rod, and the mounting seat has a mounting hole, the diameter of the mounting hole gradually increases in a direction away from the extension portion, and the mounting portion is inserted into the mounting hole to rotatably connect the check piece to the mounting seat.

[0011] The check member has a first rotation axis and a second rotation axis, the first rotation axis and the second rotation axis are perpendicular to each other, the first rotation axis is parallel to the extending direction of the mounting hole, the check member is configured to rotate around one of the first rotation axis and the second rotation axis to move the fitting part in the height direction of the check rail to make the fitting part pass the check structure, and the check member is configured to rotate around the other of the first rotation axis and the second rotation axis to move the fitting part in the width direction of the check rail to make the fitting part move along the guide rail;

[0012] In response to the push rod moving in a first direction, the push rod drives the check member to move, the fitting part moves along the guide rail, the fitting part slides relative to the sliding surface to pass the check structure, and the fitting part abuts against the abutting surface to limit the push rod from moving in a second direction opposite to the first direction.

[0013] For example, the guide rail includes a forward rail and a return rail, the forward rail and the return rail are in communication at a distal end, and the forward rail and the return rail are arranged in the width direction of the check rail;

[0014] In response to the push rod moving distally, the push rod drives the check member to move distally to make the fitting part move distally along the forward rail, and in response to the push rod moving proximally, the push rod drives the check member to move proximally to make the fitting part move proximally along the return rail.

[0015] For example, the clip applier has a firing state and a reset state, and the jaw assembly further includes a clip feed mechanism;

[0016] The check structure includes a first check structure arranged at the bottom of the return rail;

[0017] When the clip applier is in the firing state, in response to the push rod moving distally, the push rod drives the check member to move distally to make the fitting part move distally along the forward rail;

[0018] When the clip applier is in the reset state, in response to the push rod and the clip feed mechanism moving proximally, the push rod drives the check member to move proximally to make the fitting part move proximally along the return rail and pass the first check structure, and in response to the push rod moving distally in the reset state, the fitting part abuts against the abutting surface of the check structure to limit the clip feed mechanism from moving distally;

[0019] and / or,

[0020] The check structure includes a second check structure arranged at the bottom of the delivery track;

[0021] When the clip applier is in the firing state, in response to the push rod moving distally, the push rod drives the clip feed mechanism to move distally to drive the clip from the clip cartridge into the end effector, and the push rod drives the check to move distally so that the matching portion moves distally along the delivery track and over the check structure; in response to the push rod moving proximally in the firing state, the matching portion abuts against the abutment surface of the check structure to limit the proximal movement of the clip feed mechanism;

[0022] When the clip applier is in the reset state, in response to the push rod moving proximally, the push rod drives the check to move proximally so that the matching portion moves proximally along the return track.

[0023] For example, the width of at least part of the guide track gradually decreases along the movement direction of the matching portion.

[0024] For example, the mounting hole is tapered, and the first rotation axis is parallel to the central axis of the mounting hole.

[0025] For example, the check assembly further includes a compression member, one end of the compression member is connected to the mounting seat, and the other end of the compression member is connected to the check; the compression member is configured to apply a force to the check to make the matching portion abut against the bottom of the guide track.

[0026] For example, the compression member is a torsion spring, one end of the torsion spring is connected to the extension, and the other end of the torsion spring is connected to the mounting seat.

[0027] For example, the compression member is a spring, one end of the spring is connected to the extension, and the other end of the spring is connected to the mounting seat.

[0028] For example, the mounting seat includes a main body portion and a limiting portion, the limiting portion is connected to the main body portion, and the main body portion and part of the limiting portion are respectively located on opposite sides of the extension. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 A perspective view of a clip applier is provided for some embodiments of the present disclosure;

[0030] FIG. 2 A partial area view of the clip applier is shown after hiding one side of the shell, wherein the trigger is in the open position; FIG. 1

[0031] FIG. 3 ​For FIG. 2 Detail view of the boxed-in position;

[0032] FIG. 4 For FIG. 3 Sectional view of the A-A section;

[0033] FIG. 5 For FIG. 1 Schematic view of the portion of the clip applier hidden behind the side housing with the trigger between the open and intermediate positions and the engagement portion in the outbound track;

[0034] FIG. 6 For FIG. 5 Detail view of the boxed-in position;

[0035] FIG. 7 For FIG. 6 Sectional view of the B-B section;

[0036] FIG. 8 For FIG. 1 Schematic view of the portion of the clip applier hidden behind the side housing with the trigger in the intermediate position and the engagement portion in the outbound track;

[0037] FIG. 9 For FIG. 8 Detail view of the boxed-in position;

[0038] FIG. 10 For FIG. 9 Sectional view of the C-C section;

[0039] FIG. 11 For FIG. 1 Schematic view of the portion of the clip applier hidden behind the side housing with the trigger in the closed position;

[0040] FIG. 12 For FIG. 11 Detail view of the boxed-in position;

[0041] FIG. 13 For FIG. 12 Sectional view of the D-D section;

[0042] FIG. 14 For FIG. 1 Schematic view of the portion of the clip applier hidden behind the side housing with the trigger between the intermediate and open positions and the engagement portion in the return track;

[0043] FIG. 15 For FIG. 14 Detail view of the boxed-in position;

[0044] FIG. 16 For FIG. 15 Sectional view of the E-E section;

[0045] FIG. 17 for FIG. 1 A three-dimensional schematic diagram of the check assembly of the clamping clamp shown;

[0046] FIG. 17-A for FIG. 17 A three-dimensional schematic diagram of the clamping element of the check valve assembly shown;

[0047] FIG. 18 for FIG. 17 A cross-sectional view of the check valve assembly, including the check valve component, mounting base, and clamping component.

[0048] FIG. 19 for FIG. 18 The cross-sectional view of the check valve, mounting base, and clamping element shown after the check valve has rotated about the second rotation axis;

[0049] FIG. 20 for FIG. 18 The cross-sectional view of the check valve, mounting base, and clamping element shown after the check valve has rotated in another direction about the second rotation axis;

[0050] FIG. 21 for FIG. 17 A top view of the check valve assembly, including the check valve component, mounting base, and clamping component.

[0051] FIG. 22 for FIG. 21 The top view of the check valve, mounting base, and clamping element after the check valve has rotated about the first rotation axis;

[0052] FIG. 23-A for FIG. 17 A three-dimensional schematic diagram of the check valve assembly's check valve guide component;

[0053] FIG. 23-B for FIG. 23-A A three-dimensional schematic diagram of the anti-return rail component from another angle;

[0054] FIG. 23-C for FIG. 23-A The front view of the anti-return rail component shown;

[0055] FIG. 24-A A perspective view of the anti-return rail component of the clamping clamp provided for some other specific embodiments of this disclosure;

[0056] FIG. 24-B for FIG. 24-A The cross-sectional view of the anti-return rail component shown;

[0057] FIG. 25-A A perspective view of the anti-return rail component of the clamping clamp provided for some other specific embodiments of this disclosure;

[0058] FIG. 25-B for FIG. 25-A The cross-sectional view of the anti-return rail component shown;

[0059] FIG. 26 for FIG. 17 A three-dimensional schematic diagram of the check valve component of the check valve assembly shown;

[0060] FIG. 27 for FIG. 26 A three-dimensional schematic diagram of the check valve shown from another angle;

[0061] FIG. 28 A top view of the check valve, mounting base, and clamping member of the clamping clamp provided for other specific embodiments of this disclosure;

[0062] FIG. 29 for FIG. 1 A three-dimensional schematic diagram of the clamp in the clamping pliers shown;

[0063] FIG. 30 for FIG. 1 The diagram shows a perspective view of the clamp body assembly and end effector in the clamping pliers, wherein the second reset member and the third reset member are not shown;

[0064] FIG. 31-A for FIG. 30 The partial cross-sectional view of the clamp body assembly shown shows the trigger in the open position, and the second and third reset components are not shown.

[0065] FIG. 31-B for FIG. 30 The partial cross-sectional view of the clamp body assembly shown shows the trigger in the middle position, and the second and third reset components are not shown.

[0066] FIG. 31-C for FIG. 30 The partial cross-sectional view of the clamp body assembly shown shows the trigger in the closed position, and the second and third reset components are not shown.

[0067] FIG. 32 for FIG. 30 The exploded view of the clamp assembly shown is provided, in which the second and third reset components are not shown.

[0068] FIG. 33 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger in the open position;

[0069] FIG. 34 for FIG. 33 A cross-sectional view of a portion of the clamp shown from another direction;

[0070] FIG. 35 forFIG. 1 a cross-sectional view of a partial area of the clip applier shown with the trigger in an intermediate position;

[0071] FIG. 36 for FIG. 35 a cross-sectional view of a partial area of the clip applier shown in another direction;

[0072] FIG. 37 for FIG. 1 a cross-sectional view of a partial area of the clip applier shown with the trigger in a closed position;

[0073] FIG. 38 for FIG. 37 a cross-sectional view of a partial area of the clip applier shown in another direction;

[0074] FIG. 39 for FIG. 1 a cross-sectional view of a partial area of the clip applier shown with the trigger in an open position;

[0075] FIG. 40 for FIG. 1 a cross-sectional view of a partial area of the clip applier shown with the trigger in an intermediate position;

[0076] FIG. 41 for FIG. 1 a cross-sectional view of a partial area of the clip applier shown with the trigger in a closed position.

[0077] Reference numerals of the above figures:

[0078] 100 - housing;

[0079] 200 - clip cartridge, 201 - bottom, 202 - first side, 203 - second side, 204 - stop barb, 210 - clip, 211 - first clip arm, 212 - second clip arm, 213 - connecting portion, 214 - first ear, 215 - second ear, 216 - engagement portion;

[0080] 300 - trigger;

[0081] 400 - handle assembly, 410 - push rod, 411 - first stop slot, 412 - first push portion, 413 - second push portion, 414 - receiving cavity, 415 - push surface, 420 - clip feeding mechanism, 421 - push barb, 422 - second stop slot, 423 - push-out portion, 424 - abutment portion, 430 - clip application drive tube, 430a - first clip application drive tube, 430b - second clip application drive tube, 431 - third stop slot, 432 - clamping protrusion, 433 - abutment end, 440 - sleeve, 441 - clamping slot, 450 - first return member, 460 - second return member, 470 - third return member, 480 - stop member;

[0082] 500 - end effector, 510 - first jaw, 520 - second jaw;

[0083] 600 - check assembly, 610 - check rail, 611 - forward track, 612 - return track, 614 - first guide surface, 615 - second guide surface, 616 - check structure, 616A - first check structure, 616B - second check structure, 616a - sliding surface, 616b - abutment surface, 620 - check member, 621 - mating portion, 622 - mounting portion, 623 - extension, 630 - mounting seat, 631 - mounting hole, 632 - mounting post, 633 - limiting slot, 634 - main body, 635 - limiting portion, 640 - compression member. DETAILED DESCRIPTION

[0084] In order to make the purposes, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present disclosure.

[0085] It should be understood that the terms "proximal", "rear" and "distal", "front" used herein are relative to the clinician who manipulates the handle assembly of the clip applier. The terms "proximal", "rear" refer to the part close to the clinician, and the terms "distal", "front" refer to the part away from the clinician. That is, the proximal end of the operating assembly means the end relatively close to the operating assembly, and the distal end means the end relatively close to the end effector 500.

[0086] In the present disclosure, unless otherwise explicitly specified and limited, the terms "connected", "connected" and the like shall be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be movably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements such as abutment. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. It should be noted that when the "connected", "connected" is limited by the modifier, it has the meaning limited by the corresponding modifier, and only the obviously excluded cases are excluded, and other possible cases are not excluded, such as "detachably connected" means detachable connection, and does not include integration, but movable connection is not excluded.

[0087] The term "axial" refers to the length direction of the jaw assembly 400. With reference to the drawings, FIG. 3 、 FIG. 6, FIG. 9 , FIG. 12 , FIG. 15 The up-and-down direction is the width direction of the check rail piece 610. FIG. 4 , FIG. 7 , FIG. 10 , FIG. 13 , FIG. 16 The up-and-down direction is the height direction of the check rail piece 610.

[0088] The present disclosure is applied to a disposable multiple firing clip applier, a plurality of clips 210 are pre-stored in the clip cartridge 200, in a complete working process, the driving member (such as a trigger 300 or a motor, etc.) drives the jaw assembly 400 to start moving from the initial state, to drive the clip 210 in the farthest working position to enter the end effector 500 from the clip cartridge 200, to drive the remaining clips 210 in the clip cartridge 200 to advance one working position, and to drive the end effector 500 to close to drive the clip 210 in the end effector 500 to close to apply the clip 210 to the blood vessel or tissue, and then the jaw assembly 400 is reset to the initial state, until the clip applier starts the next working process.

[0089] On the basis of realizing the above functions, the specific structure of the driving member, the clip 210 and the jaw assembly 400 will not affect the action of the check assembly 600, the present embodiment exemplifies a specific structure of the driving member, the clip 210 and the jaw assembly 400, which is mainly used to illustrate how to realize the action of the check assembly 600 in the present disclosure in a specific application scenario, and should not be understood as a limitation on the concept of the present disclosure.

[0090] The driving member of the clip applier is a trigger 300 movably connected to the housing 100, the trigger 300 has an open position and a closed position, in the working process of the clip applier, the trigger 300 moves forward from the open position to the closed position, so that a clip 210 enters the end effector 500 and is closed under the driving of the end effector 500; and then the trigger 300 moves reversely from the closed position to the open position, so that the components in the jaw assembly 400 are reset to the initial state. In the process of driving the components in the jaw assembly 400 to move to advance the clip 210 in the clip cartridge 200 by one working position, if the trigger 300 accidentally has a tendency to move in an undesirable direction, the components in the jaw assembly 400 for driving the clip 210 in the clip cartridge 200 to advance by one working position will move in the undesirable direction, and then the clips 210 in the clip cartridge 200 will be arranged in disorder.

[0091] Based on this, referring to FIGS. 1-16 , the present embodiment provides a clip applier, which comprises a housing 100, a jaw assembly 400, a clip cartridge 200, an end effector 500 and a check assembly 600.

[0092] The clip cartridge 200 is connected to the housing 100, and the clip cartridge 200 comprises a clip 210. The jaw assembly 400 is connected to the housing 100, and the jaw assembly 400 comprises a push rod 410 configured to move distally along an axial direction of the jaw assembly 400 to drive the clip 210 from the clip cartridge 200 into the end effector 500 and to drive the end effector 500 to close, and the push rod 410 is configured to move proximally along the axial direction of the jaw assembly 400 to reset. The jaw assembly 400 is driven by a driving component, and the driving component is exemplarily a trigger 300 movably connected to the housing 100, for example, the trigger 300 is rotatably connected to the housing 100, and the trigger 300 is configured to move relative to the housing 100 to drive the push rod 410 to move relative to the housing 100 along the axial direction thereof.

[0093] With reference to FIGS. 17-22 , the check assembly 600 comprises a check rail 610, a check piece 620, and a mounting seat 630.

[0094] With reference to FIG. 26 and FIG. 27 , the check piece 620 comprises a fitting portion 621, an extension portion 623, and a mounting portion 622 connected in sequence. The check rail 610 is connected to the housing 100. With reference to FIGS. 23-A-23-C , the check rail 610 has a guide rail in which the fitting portion 621 is configured to move, and the guide rail is provided with a check structure 616 at the bottom, one side of the check structure 616 has a sliding surface 616a, and the other side of the check structure 616 has an abutting surface 616b. The mounting seat 630 is connected to the push rod 410, for example, the mounting seat 630 and the push rod 410 can be detachably connected, or can be integrally formed. With reference to FIGS. 18-20 , the mounting seat 630 has a mounting hole 631, and the diameter of the mounting hole 631 gradually increases in a direction away from the extension portion 623. The mounting portion 622 is inserted into the mounting hole 631 so that the check piece 620 is rotatably connected to the mounting seat 630.

[0095] The check piece 620 has a first rotation axis and a second rotation axis, and the first rotation axis and the second rotation axis are perpendicular to each other. The first rotation axis is parallel to the extension direction of the mounting hole 631. The check piece 620 is configured to rotate around one of the first rotation axis and the second rotation axis to move the fitting portion 621 in the height direction of the check rail 610, so that the fitting portion 621 passes over the check structure 616. The check piece 620 is configured to rotate around the other one of the first rotation axis and the second rotation axis to move the fitting portion 621 in the width direction of the check rail 610, so that the fitting portion 621 moves along the guide rail. For example, with reference to FIG. 21 and FIG. 22 , and FIG. 4 , FIG. 7 ,FIG. 10 , FIG. 13 and FIG. 16 , the check member 620 is rotatable about the first rotation axis to move the engaging portion 621 in the height direction of the check rail member 610 to enable the engaging portion 621 to pass the check structure 616; refer to FIGS. 18-20 and FIG. 3 , FIG. 6 , FIG. 9 , FIG. 12 and FIG. 15 , the check member 620 is rotatable about the second rotation axis to move the engaging portion 621 in the width direction of the check rail member 610 to enable the engaging portion 621 to move along the guide rail.

[0096] In response to the trigger 300 moving the push rod 410 in a first direction, the push rod 410 moves the check member 620, the engaging portion 621 moves along the guide rail, the engaging portion 621 slides relative to the sliding surface 616a to pass the check structure 616, and the engaging portion 621 abuts against the abutting surface 616b to limit the movement of the push rod 410 in a second direction opposite to the first direction. For example, the first direction is a direction from proximal to distal, and the second direction is a direction from distal to proximal, when the trigger 300 moves the push rod 410 distally, the abutment of the engaging portion 621 against the abutting surface 616b can limit the movement of the push rod 410 proximally.

[0097] Refer to FIG. 23-A-23-C , the guide rail includes a forward rail 611 and a return rail 612, the forward rail 611 and the return rail 612 are in communication at the distal end, and the forward rail 611 and the return rail 612 are arranged in the width direction of the check rail member 610; refer to FIG. 3 , FIG. 6 and FIG. 9 , in response to the movement of the push rod 410 distally, the push rod 410 moves the check member 620 distally, and the engaging portion 621 moves along the forward rail 611 distally; refer to FIG. 12 and FIG. 15 , in response to the movement of the push rod 410 proximally, the push rod 410 moves the check member 620 proximally, and the engaging portion moves along the return rail 612 proximally. Refer to FIGS. 18-20 and FIG. 3 , FIG. 6 , FIG. 9 , FIG. 12 and FIG. 15 , the check member 620 is rotatable about the second rotation axis to move the engaging portion 621 in the width direction of the check rail member 610, so that the engaging portion 621 switches between the forward rail 611 and the return rail 612.

[0098] The width of the at least partial guide track gradually decreases along the movement direction of the fitting portion 621, for example, referring to FIGS. 18-20 The width of the approach track 611 gradually decreases from the proximal end to the distal end, and then remains unchanged. The position with a larger width of the approach track 611 is in communication with the return track 612. The width of the return track 612 gradually decreases from the distal end to the proximal end, and then remains unchanged. The position with a larger width of the return track 612 is in communication with the approach track 611. Referring to FIG. 3 , and FIG. 6 , FIG. 9 , FIG. 12 , FIG. 15 and FIGS. 30-32 The check member 620 can rotate around the second rotation axis to enable the fitting portion 621 to move in the width direction of the check track member 610, so that the fitting portion 621 enters the position with a smaller width from the position with a larger width. The specific structure and arrangement position of the check structure 616 can be set according to actual needs. For example, the clip applier has a firing state and a reset state, referring to FIGS. 23-A-23-C The handle assembly 400 further includes a clip feeding mechanism 420, referring to FIGS. 11-16 The check structure 616 includes a first check structure 616A arranged at the bottom of the return track 612.

[0099] Referring to FIGS. 24-A-24-B When the clip applier is in the reset state, in response to the proximal movement of the push rod 410 and the clip feeding mechanism 420, the push rod 410 drives the check member 620 to move proximally, so that the fitting portion 621 moves along the return track 612 proximally and passes the first check structure 616A. In the reset state, if the push rod 410 moves distally, the fitting portion 621 abuts against the abutting surface 616b of the first check structure 616A to prevent the clip feeding mechanism 420 from moving distally again. That is, the abutment between the first check structure 616A and the fitting portion 621 can prevent the clip feeding mechanism 420 from moving distally again before it is completely reset, so as to avoid the clips 210 in the clip cartridge 200 from being pushed by the clip feeding mechanism 420 moving unexpectedly and causing disorder, which is beneficial to improve the action stability of the clip applier and reduce the failure rate of the clip applier.

[0100] In some embodiments, referring to FIG. 25-A , FIG. 25-B , FIGS. 24-A-24-B The first check structure 616A is arranged at least twice, and the at least two first check structures 616A are arranged in the return track 612 from distal to proximal. In the reset state of the clip applier, the fitting portion 621 passes all the first check structures 616A from distal to proximal and then reaches the proximal limit position.

[0101] To FIG. 3The shown check rail piece 610 is an example, the return rail 612 is provided with three first check structures 616A, for the convenience of description, the three first check structures 616A are named as the first first check structure 616A, the second first check structure 616A and the third first check structure 616A in the direction from far to near, after the cooperation part 621 starts to move to the proximal side from the return middle position 612b and passes the first first check structure 616A, at this time, if the trigger 300 is subjected to external force towards the closed position, the cooperation part 621 will abut against the first first check structure 616A; after the cooperation part 621 continues to move to the proximal side and passes the second first check structure 616A, at this time, if the trigger 300 is subjected to external force towards the closed position, the cooperation part 621 will abut against the second first check structure 616A; after the cooperation part 621 continues to move to the proximal side and passes the third first check structure 616A, at this time, if the trigger 300 is subjected to external force towards the closed position, the cooperation part 621 will abut against the third first check structure 616A.

[0102] In other embodiments, with reference to FIG. 6 , FIG. 9 , FIG. 12 , FIG. 15 , FIG. 16 , the first check structure 616A is provided with one.

[0103] The structure of the first check structure 616A has many forms, in some embodiments, with reference to FIGS. 23-A-23-C , FIGS. 24-A-24-B , FIG. 25-A , FIG. 16 , the abutment surface 616b is a vertical surface structure, the abutment surface 616b has oppositely arranged first and second ends, with the direction shown in FIG. 25-A and FIGS. 11-16 as a reference, the first end is higher than the second end, the first end is connected with the bottom of the return rail 612 on the distal side of the abutment surface 616b, and the second end is connected with the bottom of the return rail 612 on the proximal side of the abutment surface 616b.

[0104] With reference to FIG. 16 , in the reset state of the clip applier, in response to the reverse movement of the trigger 300 from the middle position to the open position, the cooperation part 621 moves from the distal side of the abutment surface 616b to the proximal side of the abutment surface 616b to pass the first check structure 616A, and when the trigger is positively moved between the middle position and the open position, the abutment surface 616b abuts against the cooperation part 621 passing the first check structure 616A to limit the distal movement of the clip feeding mechanism 420.

[0105] The contact area between the vertical abutment surface 616b and the mating part 621 is large, and they can reliably abut against each other. Therefore, the abutment surface 616b has high reliability in preventing the mating part 621 from moving to the far side, and the anti-return effect is good.

[0106] There are also various types of first check valve structures 616A with abutment surface 616b, for example, refer to FIGS. 23-A-23-C and FIG. 25-A The sliding surface 616a has the same height from far to near, that is, the first check structure 616A is a step. When the mating part 621 moves along the sliding surface 616a, the friction between the sliding surface 616a and the mating part 621 is relatively stable. Therefore, the mating part 621 has high stability during the process of moving to the near side.

[0107] For example, refer to FIG. 25-B The sliding surface 616a gradually rises from far to near, that is, the first check structure 616A is a protrusion with a triangular cross-section, which helps to reduce the height of the check track 610 and thus reduce the space occupied by the check track 610.

[0108] In other embodiments, reference is made to FIG. 24-B The first check structure 616A is an inclined structure that is tilted in the direction from far to near towards the bottom of the return track 612.

[0109] In response to the trigger 300 moving from the intermediate position to the open position, the mating part 621 moves from the distal side of the first check structure 616A to the proximal side of the first check structure 616A to pass over the first check structure 616A. The abutting surface 616b (i.e., the end of the first check structure 616A away from the bottom of the return track 612) abuts against the mating part 621 that passes over the first check structure 616A to restrict the clamping mechanism 420 from moving to the distal side.

[0110] There are various types of first check valve structures 616A with an inclined structure. For example, the first check valve structure 616A can be configured as a spring-loaded structure that curves upward from the bottom of the return track 612. The first check valve structure 616A itself has elastic deformation capability. Therefore, during the process of the mating part 621 abutting against the sliding surface 616a of the first check valve structure 616A and passing through the first check valve structure 616A, the first check valve structure 616A can elastically deform towards the bottom of the return track 612 so that the mating part 621 can smoothly pass over the first check valve structure 616A. After the mating part 621 disengages from the first check valve structure 616A, the first check valve structure 616A returns to its original shape under its own elasticity, so that the abutting end 613c can abut against the mating part 621.

[0111] For example, the first check structure 616A can also be provided as a structure with a certain rigidity, which works in the same way as the first check structure 616A in the form of a protrusion with a triangular cross section, which will not be repeated here.

[0112] It should be noted that in the scheme provided with multiple first check structures 616A, multiple different first check structures 616A can also be provided at the same time, for example, referring to FIGS. 30-32 , the first check structure 616A is provided with three, of which the most distal first check structure 616A is a protrusion with a triangular cross section, and the remaining first check structures 616A are all steps. The sliding surface 616a of the most distal first check structure 616A gradually rises from far to near, which is beneficial to increase the height difference between the first end of the abutting surface 616b of the first first check structure 616A from far to near and the second end of the abutting surface 616b of the last first check structure 616A. In order to facilitate the setting of the height of the abutting surface 616b to be higher, it is ensured that the abutting surface 616b and the cooperating part 621 can form sufficient contact area to ensure the reliability of abutment. Those skilled in the art can select different forms of first check structure 616A combination according to actual needs.

[0113] For example, the clip applier has a firing state and a reset state, referring to FIGS. 23-A-23-C , the handle assembly 400 further includes a clip feed mechanism 420, referring to FIGS. 2-13 , the check structure 616 includes a second check structure 616B, and the bottom of the go track 611 is provided with multiple second check structures 616B, for example, the second check structure 616B can be provided as a ratchet tooth or the like.

[0114] Referring to FIGS. 11-16 , when the clip applier is in the firing state, in response to the trigger 300 moving from the open position to the closed position, the trigger 300 pushes the push rod 410 to move distally, the push rod 410 drives the clip feed mechanism 420 to move distally to drive the clip 210 from the clip cartridge 200 into the end effector 500, and the push rod 410 drives the check piece 620 to move distally, so that the cooperating part 621 moves along the go track 611 to the distal side. The cooperating part 621 passes through multiple second check structures 616B, and in the firing state, if the push rod 410 moves proximally, the cooperating part 621 will abut against the abutting surface 616b of the second check structure 616B to prevent the clip feed mechanism 420 from moving proximally; referring to FIGS. 18-20 , in response to the trigger 300 moving from the closed position to the open position, the push rod 410 moves proximally, and the push rod 410 drives the check piece 620 to move proximally, so that the cooperating part 621 moves along the return track 612 to the proximal side.

[0115] In the firing state, during the movement of the clip feeding mechanism 420 to the distal direction, after the cooperation part 621 passes the second check structure 616B, if the trigger 300 loses power accidentally or is subjected to external force tending to move the trigger 300 to the open position, the abutment of the cooperation part 621 and the second check structure 616B can prevent the cooperation part 621 from moving to the proximal direction, so as to prevent the push rod 410 and the clip feeding mechanism 420 from moving to the proximal direction, so that the trigger 300 cannot move to the open position, that is, the abutment of the cooperation part 621 and the second check structure 616B can prevent the clip feeding mechanism 420 from moving to the proximal direction before the clip 210 is pushed into place, so as to avoid that the clips 210 in the clip magazine 200 are pushed to be disordered by the clip feeding mechanism 420 moving accidentally during the clip feeding process, which is beneficial to improve the action stability of the clip applier and reduce the failure rate of the clip applier.

[0116] In addition, during a complete working process of the clip applier, the check piece 620 moves along with the movement of the push rod 410, and during the movement of the cooperation part 621, the cooperation part 621 needs to move in the width direction of the check rail piece 610 to move along the annular guide rail, and also needs to move in the height direction of the check rail piece 610 to bypass the second check structure 616B. In the embodiment of the disclosure, the mounting hole 631 of the mounting seat 630 is rotatably connected with the mounting part 622 of the check piece 620, and the hole diameter of the mounting hole 631 gradually increases in the direction away from the extension part 623. The mounting hole 631 can allow the check piece 620 to rotate around the first rotation axis and the second rotation axis which are different in extension direction, so that the check piece 620 can realize the movement of the cooperation part 621 in the width direction and the height direction of the check rail piece 610 through the overall rotation. On this basis, the check piece 620 can be made of a material with relatively large rigidity, for example. When the cooperation part 621 abuts against the second check structure 616B, the deformation amount of the check piece 620 is small, which can ensure the stability of the abutment and avoid that the cooperation part 621 slips off the second abutment surface 616b of the second check structure 616B due to excessive deformation of the check piece 620 under stress, thereby causing check failure.

[0117] It should be noted that the two rotation axes of the check piece 620 are only abstracted for ease of description. In actual use, the rotation of the check piece 620 can be the superposition of the rotation around the first rotation axis and the rotation around the second rotation axis. In addition, the rotation of the check piece 620 around the first rotation axis can be configured to cause the cooperation part 621 to move in the width direction of the check rail piece 610, and the rotation of the check piece 620 around the second rotation axis can be configured to cause the cooperation part 621 to move in the height direction of the check rail piece 610. The configuration can be set according to actual needs.

[0118] The mounting hole 631 can have various forms of configurations. In some embodiments, with reference to FIG. 7, the mounting hole 631 can be a hole with a gradually increasing hole diameter in the direction away from the extension part 623. In some embodiments, with reference to FIG. 8, the mounting hole 631 can be a hole with a gradually increasing hole diameter in the direction away from the extension part 623, and the hole diameter of the mounting hole 631 is greater than the diameter of the mounting part 622. FIGS. 23-C-27The mounting hole 631 is tapered, the hole diameter of the mounting hole 631 gradually increases in the direction away from the extension 623, and the first rotation axis is parallel to the central axis of the tapered mounting hole 631. FIG. 23-C The direction shown in FIG. 26 is the initial state of the mounting seat 630 and the check piece 620, and with reference to FIG. 27 , when the mounting portion 622 rotates in the mounting hole 631 in the clockwise direction, the extension 623 rotates upward, and the fitting portion 621 is deviated to one side in the width direction of the check rail piece 610; with reference to FIGS. 17-22 , when the mounting portion 622 rotates in the mounting hole 631 in the counterclockwise direction, the extension 623 rotates downward, and the fitting portion 621 is deviated to the other side in the width direction of the check rail piece 610. The tapered mounting hole 631 can limit the part of the mounting portion 622 close to the extension 623 to a region with a smaller hole diameter, and make the remaining part of the mounting portion 622 have a larger movement space, so as to reduce the swing of the check piece 620 in the far-near direction while ensuring that the check piece 620 has a larger rotation range around the second rotation axis.

[0119] In other embodiments, the mounting hole 631 can also be a cylindrical hole, the mounting hole 631 and the mounting portion 622 are gap-fitted, so that the mounting portion 622 can rotate around the first rotation axis and rotate within a certain range around the second rotation axis; or the mounting hole 631 can also be a hole with a trapezoidal longitudinal section or other shaped special-shaped hole.

[0120] With reference to FIGS. 17-22 , the check assembly 600 further comprises a pressing piece 640 connected to the push rod 410, one end of the pressing piece 640 is connected to the mounting seat 630, the other end of the pressing piece 640 is connected to the check piece 620, and the pressing piece 640 is configured to apply a force to the check piece 620 to make the fitting portion 621 abut against the bottom of the check rail piece 610, so that the fitting portion 621 can always stably cooperate with the structure provided in the guide rail.

[0121] The pressing piece 640 can be arranged in various ways, and in some embodiments, with reference to FIGS. 17-22 , the pressing piece 640 is a torsion spring, one end of the torsion spring abuts against and applies a force to the extension 623 to make the fitting portion 621 abut against the bottom of the guide rail, for example, with reference to FIG. 17 , one end of the torsion spring abuts against the side of the extension 623 away from the check rail piece 610; for example, the extension 623 can also be provided with a hole structure such as a through hole or a blind hole, and one end of the torsion spring is inserted into the hole structure; other forms can also be provided, as long as the torsion spring can provide the force to the extension 623 to make the fitting portion 621 abut against the bottom of the check rail piece 610. The other end of the torsion spring is limited by the mounting seat 630, for example, with reference toFIG. 17-A , FIG. 21 , FIG. 22 and FIGS. 17-22 The mounting base 630 has a limiting groove 633, the other end of the torsion spring is accommodated in the limiting groove 633, and the sidewall of the limiting groove 633 is used to limit the other end of the torsion spring.

[0122] Reference FIGS. 17-22 The mating part 621, the extension part 623 and the mounting part 622 are perpendicular to each other, and the torsion spring is wrapped around the mounting part 622. The mounting part 622 can play a certain limiting role for the torsion spring to improve the structural stability of the check assembly 600.

[0123] Reference FIG. 28 The mounting base 630 includes a mounting post 632 extending along the extension direction of the mounting hole 631, which is located in the mounting post 632. A torsion spring is sleeved on the mounting post 632, with one end of the torsion spring abutting against the side of the extension 623 away from the check rail member 610, and the other end of the torsion spring being limited by the mounting base 630. The mounting post 632 provides a fixed position for the torsion spring, preventing it from moving in any other form except through torsion caused by the extension 623, and also provides an installation position for the check rail member 620. This simplifies the structure of the check rail assembly 600 and improves its structural stability.

[0124] In other embodiments, reference is made to FIG. 28 Alternatively, the clamping element 640 can be a spring, with one end connected to the mounting base 630 and the other end contacting the extension 623, for example, see reference. FIG. 33 One end of the spring is connected to the mounting base 630 and located on the side of the extension 623 near the check rail member 610, and the other end is connected to the extension 623, so as to... FIGS. 17-22 With the direction shown as a reference, the spring is configured to be stretched when the extension 623 rotates upward, so that the spring can provide the extension with a force that causes the mating part 621 to abut against the bottom of the check rail member 610; for example, one end of the spring may be connected to the mounting base 630 and located on the side of the extension 623 away from the check rail member 610, and the other end may be connected to the extension 623, and the spring is configured to be compressed when the extension 623 rotates upward, so that the spring can provide the extension with a force that causes the mating part 621 to abut against the bottom of the check rail member 610.

[0125] Reference FIGS. 18-20 The mounting base 630 includes a main body 634 and a limiting part 635. The limiting part 635 is connected to the main body 634. In the extending direction of the mounting hole 631, the main body 634 and part of the limiting part 635 are respectively located on both sides of the extension 623, so as to... FIGS. 29-41The direction is taken as a reference. The main body 634 and the partial limiting portion 635 can limit the rotation and movement of the extension portion 623 in the up-down direction, so as to avoid the check valve 622 from being separated from the mounting seat 630 in the up-down direction.

[0126] The structure of the clip 210 in the clip applier, the structure of the handle assembly 400 and the working manner thereof provided by some embodiments of the present disclosure will be introduced below. It should be noted that the following content is only an example and does not limit the present disclosure. FIG. 29 The structure of the clip 210 in the clip applier, the structure of the handle assembly 400 and the working manner thereof provided by some embodiments of the present disclosure will be introduced below. It should be noted that the following content is only an example and does not limit the present disclosure.

[0127] Referring to FIG. 32 , the clip 210 includes a first clip arm 211, a second clip arm 212 and a connecting portion 213 between the first clip arm 211 and the second clip arm 212. The connecting portion 213 is flexible, so that the first clip arm 211 and the second clip arm 212 can rotate relative to each other. One end of the first clip arm 211 is connected to the connecting portion 213, and the other end is provided with an engaging portion 216, for example, the engaging portion 216 is a curved C-shaped hook portion. The first clip arm 211 is provided with two first ear portions 214 near the engaging portion 216, and the two first ear portions 214 protrude relative to the first clip arm 211 on opposite sides of the first clip arm 211. One end of the second clip arm 212 is connected to the connecting portion 213, and the other end is provided with two second ear portions 215, and the two second ear portions 215 protrude to opposite sides of the second clip arm 212, respectively.

[0128] Under the driving of an external force, the first clip arm 211 and the second clip arm 212 move close to each other, so that the engaging portion 216 moves between the two second ear portions 215 until the engaging portion 216 is clamped between the two second ear portions 215, and the engaging portion 216 is hooked on the end portion of the second clip arm 212. At this time, the blood vessel or tissue between the first clip arm 211 and the second clip arm 212 is clamped, and the hemostasis of the blood vessel or tissue is achieved.

[0129] Referring to FIG. 34 , the clip cartridge 200 includes a bottom portion 201 extending in an axial direction and opposite first and second side portions 202 and 203. Referring to FIG. 36 , FIG. 38 , FIG. 32 When the clip 210 is installed in the clip cartridge 200, the clip 200 is compressed due to the size and internal space of the clip cartridge 200. For example, the first clip arm 211 abuts against the first side portion 202, and the second clip arm 212 abuts against the second side portion 203, so that the first clip arm 211 and the second clip arm 212 move close to each other but are not engaged.

[0130] Referring to FIG. 33The bottom 201 of the clip bin 200 has a plurality of limiting barbs 204 along its length direction, and the clip bin 200 is provided with a plurality of work stations for placing the clips 210 along its length direction, and each work station is provided with a limiting barb 204. Each limiting barb 204 is inclined from the bottom 203 of the clip bin 200 towards the distal end of the clip bin 200 and towards the inside of the clip bin 200, the proximal end of each limiting barb 204 is fixed to the bottom 203, and the distal end is movable, the distal end of the limiting barb 204 is an inclined end, and in this embodiment, the limiting barb 204 is an elastic piece with the distal end upturned.

[0131] With reference to FIG. 35 , FIG. 37 , FIG. 32 When the clip 210 is installed in the clip bin 200, the distal end of each limiting barb 204 abuts against the first ear portion 214 on the proximal side of the first ear portion 214 of a clip 210, and the limiting barb 204 can prevent the clip 210 from moving from the current work station to the adjacent work station on the proximal side in the clip bin 200. When the clip 210 moves axially and distally, the clip 210 slides in contact with the limiting barb 204 of the adjacent work station on the distal side, and the limiting barb 204 is pressed towards the bottom 201 of the clip bin 200, so that the clip 210 can smoothly pass through the limiting barb 204 and enter the adjacent work station on the distal side from the current work station.

[0132] With reference to FIG. 33 The clip feeding mechanism 420 is installed on the opposite side of the bottom 201 of the clip bin 200, and the clip feeding mechanism 420 has a plurality of pushing barbs 421 along its length direction, and each pushing barb 421 corresponds to a clip 210 when the clip 210 is installed in the clip bin 200. Each pushing barb 421 is inclined from the clip feeding mechanism 420 towards the distal end of the clip feeding mechanism 420 and towards one side of the clip feeding mechanism 420, the proximal end of each pushing barb 421 is fixed to the clip feeding mechanism 420, and the distal end is movable, the distal end of the pushing barb 421 is an inclined end, and when the clip feeding mechanism 420 is installed in the clip applier, the pushing barb 421 is inclined towards the inside of the clip bin 200, and in this embodiment, the pushing barb 421 is an elastic piece with the distal end upturned.

[0133] With reference to FIG. 35 , FIG. 37 , FIG. 32When the clips 210 are installed in the clip magazine 200, the distal end of each push barb 421 is located proximally to the first ear 214 of a clip 210. When the clip feeding mechanism 420 moves distally, the distal end of each push barb 421 abuts proximally to the first ear 214 of a clip 210, so that the plurality of clips 210 are simultaneously moved distally until each clip 210 enters the distal adjacent station from the current station, and the distal end of the limiting barb 204 of the distal adjacent station abuts proximally to the first ear 214 of the clip 210; then the clip feeding mechanism 420 moves proximally, the push barb 421 abuts and is pressed by the clip 210, so that the push barb 421 is pressed towards the clip feeding mechanism 420, and the push barb 421 moves proximally along the side of the clip 210, so that the push barb 421 can pass through the clip 210 and reset.

[0134] With reference to FIG. 34 The distal end of the clip feeding mechanism 420 is provided with a push-out portion 423. With reference to FIG. 36 When the trigger 300 is in the open position, the push-out portion 423 is located proximally to the most distal clip 210 in the clip magazine 200. With reference to FIGS. 31-A-31-B In response to the movement of the trigger 300 from the open position to the intermediate position, the clip feeding mechanism 420 moves distally, so that the push-out portion 423 abuts the most distal clip 210 in the clip magazine 200 and pushes the most distal clip 210 in the clip magazine 200 into the end effector 500.

[0135] In the above embodiment, the clip feeding mechanism 420 is provided with both the push barb 421 and the push-out portion 423, so that when the clip feeding mechanism 420 moves distally, the clip feeding mechanism 420 pushes the plurality of clips 210 in the clip magazine 200 distally by a distance of one station, and at the same time, the clip 210 in the most distal station in the clip magazine 200 is pushed into the end effector 500. In other embodiments, the push barb 421 and the push-out portion 423 can be provided in two different components, when the component provided with the push-out portion 423 moves distally, the clip 210 in the most distal station in the clip magazine 200 enters the end effector 500, and when the component provided with the push barb 421 moves distally, the plurality of clips 210 in the clip magazine 200 move distally by a distance of one station, the above two actions can be performed in sequence or simultaneously. For example, the clip feeding mechanism 420 is provided with the push-out portion 423, the push rod 410 is provided with a first rack, the component provided with the push barb 421 is provided with a second rack, the first rack and the second rack are engaged with the gear located therebetween, so that the push rod 410 can drive the component provided with the push barb 421 to move, and the moving directions are opposite, so that when the push rod 410 moves proximally, the component is driven to move distally, and in turn, the plurality of clips 210 in the clip magazine 200 move distally by a distance of one station.

[0136] It should be noted that in the present disclosure, the action of the non-return assembly 600 is only associated with the component for driving the plurality of clamping jaws 210 in the clamping chamber 200 to move distally by a distance of one station, i.e., the non-return assembly 600 can only prevent the component for driving the plurality of clamping jaws 210 in the clamping chamber 200 to move in an undesired direction when the component moves, and the specific structure by which the plurality of clamping jaws 210 in the clamping chamber 200 move distally by a distance of one station does not affect the action of the non-return assembly 600, and a person skilled in the art can set it according to actual needs.

[0137] With reference to FIG. 32 , FIGS. 39-41 , FIG. 39 , the clamping feeding mechanism 420 is movably connected to the push rod 410, and the clamping feeding mechanism 420 is movably connected to the housing 110, the housing 110 comprises a structure for limiting the movement range of the clamping feeding mechanism 420, the drive assembly 400 comprises a first reset member 450 arranged in the axial direction, the first reset member 450 can be a spring, the distal end of the first reset member 450 abuts against the clamping feeding mechanism 420, and the proximal end abuts against the push rod 410, when the trigger 300 is in the open position, the length of the first reset member 450 is the original length; the first reset member 450 is configured to maintain the original length when the trigger 300 moves from the open position to the intermediate position, so that the clamping feeding mechanism 420 moves synchronously with the push rod 410; when the trigger 300 moves from the intermediate position to the closed position, the first reset member 450 is compressed, so that the push rod 410 moves relative to the clamping feeding mechanism 420. With reference to FIG. 40 and FIG. 40 , during the movement of the trigger 300 from the open position to the intermediate position, the clamping feeding mechanism 420 is not limited, so the first reset member 450 maintains the original length, so that the clamping feeding mechanism 420 moves distally synchronously with the push rod 410 to make one clamping jaw 210 enter the end effector 500; when the trigger 300 reaches the intermediate position, with reference to FIGS. 31-B-31-C , the clamping feeding mechanism 420 is limited and cannot continue to move relative to the housing 110; and then with reference to FIG. 40 , FIG. 41 and FIGS. 39-41 , during the movement of the trigger 300 from the intermediate position to the closed position, the clamping feeding mechanism 420 no longer moves distally, the push rod 410 continues to move distally and abuts against the clamping driving tube 430, so that the clamping driving tube 430 drives the sleeve 440 to move distally to close the end effector 500, at this time the first reset member 450 is compressed; when the trigger 300 is no longer subjected to external force, the first reset member 450 restores to the original length.

[0138] With reference to FIG. 32The inner portion of the push rod 410 has an accommodating cavity 414 extending in the axial direction, the proximal end of the clamping mechanism 420 is accommodated in the accommodating cavity 414, and the first reset member 450 is accommodated in the accommodating cavity 414. One end of the first reset member 450 abuts against the proximal end of the clamping mechanism 420, and the other end abuts against the inner wall of the accommodating cavity 414. This reasonable arrangement is beneficial to save the space occupied by the driving assembly 400.

[0139] With reference to FIGS. 39-41 The driving assembly 400 further comprises a first limiting member 480, the push rod 410 has a first limiting slot 411 extending in the axial direction, and the clamping mechanism 420 has a second limiting slot 422 extending in the axial direction. With reference to FIG. 39 The first limiting member 480 is connected to and fixed relative to the housing 110, and the first limiting member 480 is arranged through the first limiting slot 411 and the second limiting slot 422.

[0140] With reference to FIG. 40 When the trigger 300 is in the open position, the distal end inner wall of the first limiting slot 411 abuts against the first limiting member 480, and the distal end inner wall of the second limiting slot 422 abuts against the first limiting member 480. With reference to FIG. 41 When the trigger 300 is in the intermediate position, the first limiting member 480 is located between the distal end inner wall and the proximal end inner wall of the first limiting slot 411, and the proximal end inner wall of the second limiting slot 422 abuts against the first limiting member 480. At this time, the clamping mechanism 420 cannot continue to move distally relative to the housing 110, but the push rod 410 can continue to move distally relative to the housing 110. With reference to FIGS. 31-A-31-C When the trigger 300 is in the closed position, the proximal end inner wall of the first limiting slot 411 abuts against the first limiting member 480, and at this time, the push rod 410 also cannot continue to move distally relative to the housing 110. The cooperation of the first limiting member 480 with the first limiting slot 411 and the second limiting slot 422 can limit the movement range of the push rod 410 and the clamping mechanism 420, and improve the action stability.

[0141] With reference to FIG. 32 , FIGS. 39-41 , FIG. 31-A The push rod 410 comprises a first push portion 412 and a second push portion 413. The first push portion 412 has the accommodating cavity 414, and the second push portion 413 has the first limiting slot 411. The proximal end of the second push portion 413 is accommodated in the accommodating cavity 414. The proximal end of the clamping mechanism 420 is provided with an abutting portion 424. The abutting portion 424 is arranged in a bent manner, so that the proximal end of the clamping mechanism 420 forms a hook shape, and the abutting portion 424 is accommodated in the accommodating cavity 414. With reference to FIG. 31-B , FIG. 39 , FIG. 40 and FIG. 31-CDuring the movement of the trigger 300 from the open position to the intermediate position, the abutting portion 424 abuts against the proximal end of the second pushing portion 413; refer to FIG. 41 and FIGS. 39-41 During the movement of the trigger 300 from the intermediate position to the closed position, the abutting portion 424 is separated from the proximal end of the second pushing portion 413.

[0142] Refer to FIG. 32 The clip applying driving tube 430 is partially accommodated inside the housing 110, in some embodiments, in order to facilitate installation, refer to FIG. 36 The clip applying driving tube 430 can include a first clip applying driving tube 430a and a second clip applying driving tube 430b, which are buckled to each other in the radial direction of the clip applying driving tube 430. Refer to FIG. 38 and FIG. 30 The end effector 500 includes a first jaw arm 510 and a second jaw arm 520, the proximal ends of the first jaw arm 510 and the second jaw arm 520 are rotatably connected to the clip cartridge 200, the distal ends are capable of approaching each other to achieve the closure of the end effector 500, and are capable of moving away from each other to achieve the opening of the end effector 500. The sleeve 440 is sleeved outside the clip cartridge 200 and the clip feeding mechanism 420, the proximal end of the sleeve 440 is connected to the clip applying driving tube 430, and the distal end of the sleeve 440 is matched with the end effector 500.

[0143] When the trigger 300 moves from the intermediate position to the closed position, refer to FIG. 31-B , FIG. 31-C , FIG. 38 and FIG. 32 The pushing rod 410 pushes the clip applying driving tube 430 to move distally, the sleeve 440 moves distally under the pushing of the clip applying driving tube 430, the proximal ends of the first jaw arm 510 and the second jaw arm 520 are accommodated inside the sleeve 440, so that the distal ends of the first jaw arm 510 and the second jaw arm 520 approach each other, achieving the closure of the end effector 500.

[0144] Refer to FIGS. 39-41 The clip applying driving tube 430 has a third limiting groove 431 extending in the axial direction, in some embodiments, the first clip applying driving tube 430a and the second clip applying driving tube 430b both have the third limiting groove 431, refer to FIG. 39 The first limiting piece 480 is threaded through the two third limiting grooves 431.

[0145] Refer to FIG. 40 and FIG. 41 When the trigger 300 is in the open position and in the intermediate position, the distal end inner wall of the third limiting groove 431 abuts against the first limiting piece 480; refer to FIG. 32When the trigger 300 is in the closed position, the proximal end inner wall of the third limit slot 431 abuts against the first limit member 480, at which time the clip applying drive tube 430 cannot continue to move distally relative to the housing 110. The cooperation of the first limit member 480 and the third limit slot 431 can limit the movement range of the clip applying drive tube 430, improving the stability of the action.

[0146] With reference to FIGS. 39-41 The clip applying drive tube 430 can also be provided with an axially extending fourth limit slot 432, the sleeve 440 is provided with an axially extending fifth limit slot 441, and the drive assembly 400 further includes a second limit member 490, with reference to FIGS. 39-41 The second limit member 490 is connected to and fixed relative to the housing 110.

[0147] When the trigger 300 is in the open position and in the intermediate position, the distal end inner wall of the fourth limit slot 432 and the distal end inner wall of the fifth limit slot 441 both abut against the second limit member 490; when the trigger 300 is in the closed position, the proximal end inner wall of the fourth limit slot 432 and the proximal end inner wall of the fifth limit slot 441 both abut against the second limit member 490.

[0148] With reference to FIGS. 39-41 The drive assembly 400 further includes a second return member 460, which can be a spring. The second return member 460 is arranged axially and sleeved on the push rod 410, with the distal end abutting against the housing 110 and the proximal end abutting against the push rod 410. The second return member 460 is configured to store energy when the push rod 410 moves distally, and the second return member 460 releases the energy by recovering the deformation, thereby providing power for the return of the push rod 410.

[0149] With reference to ​ The drive assembly 400 further includes a third return member 470, which can be a spring. The third return member 470 is arranged axially and sleeved on the clip applying drive tube 430, with the distal end abutting against the housing 110 and the proximal end abutting against the clip applying drive tube 430. The third return member 470 is configured to store energy when the clip applying drive tube 430 moves distally, and the third return member 470 releases the energy by recovering the deformation, thereby providing power for the return of the clip applying drive tube 430.

[0150] In summary, in the clip applier of the present disclosure, during a complete working process of the clip applier, the check piece 620 moves along with the movement of the push rod 410, and the fitting part 621 needs to move in the width direction of the check rail piece 610 to move along the annular guide rail, and also needs to move in the height direction of the check rail piece 610 to bypass the check structure 616. In the embodiment of the present disclosure, the mounting hole 631 of the mounting seat 630 is rotatably connected with the mounting part 622 of the check piece 620, and the hole diameter of the mounting hole 631 gradually increases in the direction away from the extension part 623. The mounting hole 631 can allow the check piece 620 to rotate around the first rotation axis and the second rotation axis which are different in extension direction. Therefore, the check piece 620 can realize the movement of the fitting part 621 in the width direction and the height direction of the check rail piece 610 through the overall rotation. On this basis, the check piece 620 can be made of a material with relatively large rigidity. When the fitting part 621 abuts against the check structure 616, the deformation amount of the check piece 620 is small, which can ensure the stability of the abutment and avoid the check failure caused by the fitting part 621 slipping off the second abutment surface 616b of the check structure 616 due to the excessive deformation of the check piece 620 under stress.

[0151] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0152] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present disclosure, and are not intended to limit the protection scope of the present disclosure. Any equivalent embodiments or changes made without departing from the spirit of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A clamping pliers, characterized in that, Includes housing, clamp body assembly, clamping chamber, end effector, and check valve assembly; The clamping compartment is connected to the housing, and the clamping compartment includes a clamp; The clamp assembly is connected to the housing, and the clamp assembly includes a push rod configured to move distally along the axial direction of the clamp assembly to drive the clamp from the clamping chamber into the end effector and drive the end effector to close, and the push rod is configured to move proximally along the axial direction of the clamp assembly to reset; The check valve assembly includes a check valve rail component, a check valve component, and a mounting base; the check valve component includes a mating part, an extension part, and a mounting part connected in sequence. The check track component is connected to the housing. The check track component has a guide track. The mating part is configured to move in the guide track. A check structure is provided at the bottom of the guide track. One side of the check structure has a sliding surface, and the other side of the check structure has an abutment surface. The mounting base is connected to the push rod. The mounting base has a mounting hole, the diameter of which gradually increases in the direction away from the extension. The mounting part is inserted into the mounting hole so that the check valve is rotatably connected to the mounting base. The check valve has a first rotation axis and a second rotation axis, the first rotation axis and the second rotation axis are perpendicular to each other, the first rotation axis is parallel to the extension direction of the mounting hole, the check valve is configured to rotate about one of the first rotation axis and the second rotation axis to move the mating part in the height direction of the check valve track so that the mating part passes over the check valve structure, and the check valve rotates about the other of the first rotation axis and the second rotation axis to move the mating part in the width direction of the check valve track so that the mating part moves along the guide track; In response to the push rod moving in a first direction, the push rod drives the check member to move, the mating part moves along the guide track, the mating part slides relative to the sliding surface to pass over the check structure, and the mating part abuts against the abutting surface to restrict the push rod from moving in a second direction opposite to the first direction.

2. The clamping pliers according to claim 1, characterized in that, The guide rail includes a going track and a returning track, the going track and the returning track are connected at the far end, and the going track and the returning track are arranged along the width direction of the stop track component; In response to the push rod moving distally, the push rod drives the check valve to move distally, causing the mating part to move distally along the outgoing track; in response to the push rod moving proximally, the push rod drives the check valve to move proximally, causing the mating part to move proximally along the return track.

3. The clamping pliers according to claim 2, characterized in that, The clamping pliers have a firing state and a reset state, and the clamp body assembly also includes a clamping mechanism; The check structure includes a first check structure, which is disposed at the bottom of the return track; When the clamp is in the firing state, in response to the push rod moving to the distal side, the push rod drives the anti-return member to move to the distal side, so that the mating part moves to the distal side along the outgoing track; When the clamping clamp is in the reset state, in response to the push rod and the clamping mechanism moving proximally, the push rod drives the check valve to move proximally, causing the mating part to move proximally along the return track and pass over the first check valve structure; in response to the push rod moving distally in the reset state, the mating part abuts against the abutment surface of the check valve structure to restrict the clamping mechanism from moving distally. And / or, The check structure includes a second check structure, which is disposed at the bottom of the outgoing track; When the clamp is in the firing state, in response to the distal movement of the push rod, the push rod drives the clamping mechanism to move distally to drive the clamp from the clamping chamber into the end effector. The push rod also drives the check valve to move distally, causing the mating part to move distally along the outgoing track and pass over the check valve. In response to the proximal movement of the push rod in the firing state, the mating part abuts against the abutment surface of the check valve to restrict the proximal movement of the clamping mechanism. When the clamp is in the reset state, in response to the push rod moving proximally, the push rod drives the check valve to move proximally, causing the mating part to move proximally along the return track.

4. The clamping pliers according to claim 1, characterized in that, Along the direction of movement of the mating part, the width of at least a portion of the guide track gradually decreases.

5. The clamping pliers according to any one of claims 1 to 4, characterized in that, The mounting hole is tapered, and the first axis of rotation is parallel to the central axis of the mounting hole.

6. The clamping pliers according to any one of claims 1 to 4, characterized in that, The check valve assembly further includes a clamping member, one end of which is connected to the mounting base and the other end of which is connected to the check valve. The clamping member is configured to apply a force to the check valve to cause the mating portion to abut against the bottom of the guide rail.

7. The clamping pliers according to claim 6, characterized in that, The clamping element is a torsion spring, one end of which is connected to the extension and the other end of which is connected to the mounting base.

8. The clamping pliers according to claim 6, characterized in that, The clamping element is a spring, one end of which is connected to the extension and the other end of which is connected to the mounting base.

9. The clamping pliers according to claim 1, characterized in that, The mounting base includes a main body and a limiting part, the limiting part being connected to the main body, and the main body and a portion of the limiting part being located on opposite sides of the extension.

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