Clip applier
By introducing a check valve and ratchet mechanism into the clamping pliers, the problem of clamp misalignment caused by unexpected trigger movement is solved, resulting in a more stable and reliable clamping and clamping process and reducing the failure rate.
Patent Information
- Application Number
- CN202422869390.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing clamping pliers are prone to clamping disorder due to unexpected trigger movement during clamping and clamping processes, which affects the stability of operation and increases the failure rate.
A check valve assembly is used, including a check valve rail and a check valve. The ratchet structure restricts the reverse movement of the trigger, ensuring that the clamp is smoothly fed into the end effector and closes stably. A clamping element is used to enhance the check valve effect.
It improves the stability of the clamping action, reduces the failure rate, ensures smooth clamp insertion and closure, and enhances the reliability and labor-saving of operation.
Smart Images
Figure CN223799801U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to a clip applier. BACKGROUND
[0002] During a surgical procedure, it is necessary to ligate a severed tissue or blood vessel to stop bleeding. A common method is to use a clip applier to apply a clip to the tissue or blood vessel.
[0003] The clip applier includes a clip cartridge and an end effector, and the clip cartridge stores clips. A complete clip application 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 to the tissue or blood vessel to block blood flow. After the clip applier completes a complete clip application process, the movement units inside the clip applier need to be reset, and then the clip applier performs the next clip application 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 solutions: a clip applier includes a housing, a body assembly, a trigger, 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 trigger is movably connected to the housing.
[0008] The body assembly is connected to the housing, and the body assembly includes a push rod configured to move axially distally under the push of the trigger to drive the clip to enter the end effector from the clip cartridge and drive the end effector to close.
[0009] The check assembly includes a check rail and a check piece.
[0010] The check piece is connected to the push rod, and the check piece includes a fitting portion having a fitting tip, one side of the fitting tip having a first sliding surface obliquely arranged relative to the extension direction of the fitting portion, and the other side of the fitting tip having a first abutting surface.
[0011] The check rail member is connected to the housing, and has a guide rail in which the engagement tip is accommodated. A plurality of ratchets are arranged at the bottom of the guide rail, and form a check section. One side of the ratchets has a second sliding surface, and the other side of the ratchets has a second abutting surface. The engagement tip is configured such that the first sliding surface can slide relative to the second sliding surface, and the first abutting surface can abut against the second abutting surface.
[0012] In response to the trigger moving in a first direction and driving the push rod to move, the push rod drives the check member to move, and the engagement portion moves along the guide rail. When the engagement portion is in the check section, the first sliding surface slides relative to the second sliding surface to drive the engagement portion to move from one side of the ratchets to the other side of the ratchets, and the engagement portion sequentially passes through the plurality of ratchets. In response to the trigger moving in a second direction opposite to the first direction when the engagement portion is in the check section, the first abutting surface and the second abutting surface are coupled to limit the trigger from moving in the second direction.
[0013] For example, the first abutting surface of the engagement tip is recessed.
[0014] For example, the trigger has an open position and a closed position. 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. The bottom of the forward rail is provided with the check section.
[0015] The movement of the trigger from the open position to the closed position is forward movement, and the movement of the trigger from the closed position to the open position is reverse movement. The clip applier has a firing state and a reset state.
[0016] In the firing state, in response to the trigger moving forward, the trigger drives the push rod to move distally, the push rod drives the check member to move distally, and the engagement portion moves along the forward rail to move distally from the proximal side of the check section to the distal side of the check section. In response to the trigger moving reversely when the engagement portion is in the check section, the first abutting surface and the second abutting surface are coupled to limit the trigger from moving reversely.
[0017] In the reset state, the push rod moves proximally, and the trigger moves reversely. The push rod drives the check member to move proximally, and the engagement portion moves along the return rail to move proximally.
[0018] For example, the handle assembly further includes a clip feeding mechanism and a clip applying mechanism. The push rod is connected to the clip feeding mechanism and connected to the clip applying mechanism.
[0019] The trigger further has an intermediate position between the open position and the closed position, the travel track has a travel intermediate position, the check section is provided at least from a proximal end of the travel track to the travel intermediate position;
[0020] In the firing state, in response to the trigger moving forward from the open position to the intermediate position, the trigger pushes the push rod to move distally and drives the clip feeding mechanism to move distally relative to the clip cartridge, so as to drive the clip to enter the end effector from the clip cartridge, the check member moves distally, and the matching portion moves distally along the travel track from the proximal end of the travel track, and the matching portion reaches the travel intermediate position after passing the check section; in response to the trigger moving forward from the intermediate position to the closed position, the trigger pushes the push rod to continue moving distally and drives the clip feeding mechanism to move distally, so as to drive the end effector to close, and the check member continues to move distally, and the matching portion moves from the travel intermediate position to the distal end of the return track.
[0021] For example, the bottom of the travel track gradually rises in the direction from proximal to distal, and the first abutting surface of the matching tip is recessed.
[0022] For example, the trigger has an open position and a closed position, the guide track includes a travel track and a return track, the travel track and the return track are in communication at a distal end, and the bottom of the return track is provided with the check section;
[0023] The movement of the trigger from the open position to the closed position is forward movement, and the movement of the trigger from the closed position to the open position is reverse movement; the clip applier has a firing state and a reset state;
[0024] In the firing state, in response to the trigger moving forward, the trigger pushes the push rod to move distally, and the push rod drives the check member to move distally, so that the matching portion moves distally along the travel track;
[0025] In the reset state, the push rod moves proximally, and the trigger moves reversely, the push rod drives the check member to move proximally, so that the matching portion moves proximally along the return track, and the matching portion moves from the distal side of the check section to the proximal side of the check section; in response to the trigger moving forward, the first abutting surface and the second abutting surface are coupled to limit the forward movement of the trigger.
[0026] For example, the jaw assembly further comprises a clip feeding mechanism and a clip applying mechanism, the push rod is connected to the clip feeding mechanism and connected to the clip applying mechanism;
[0027] The trigger further has an intermediate position between the open position and the closed position, the return track has a return intermediate position, the check section is provided from the proximal end of the return track to the return intermediate position;
[0028] In the reset state, in response to the reverse movement of the trigger from the closed position to the intermediate position, the push rod and the clip applying mechanism move proximally, the check member moves proximally, the matching part starts to move proximally along the return track from the distal end of the return track until reaching the return intermediate position; in response to the reverse movement of the trigger from the intermediate position to the open position, the push rod and the clip feeding mechanism move proximally, the check member continues to move proximally, the matching part moves from the distal side of the check section to the proximal side of the check section, and to the proximal end of the return track.
[0029] For example, the bottom of the return track gradually rises in the direction from distal to proximal, and the first abutting surface of the matching tip is recessed.
[0030] For example, the return track and the return track are in communication at the proximal end and the distal end, the return track and the proximal end of the return track are provided with a first guide surface, in response to the forward movement of the trigger from the open position to the closed position, the matching part moves distally and abuts the first guide surface, the first guide surface makes the matching part move distally along the return track;
[0031] The distal end of the return track and the return track is provided with a second guide surface, in response to the reverse movement of the trigger from the closed position to the open position, the matching part moves proximally and abuts the second guide surface, the second guide surface makes the matching part move proximally along the return track.
[0032] For example, the check member further comprises a mounting part and an extension part, the mounting part, the extension part and the matching part are connected in sequence, the mounting part is connected to the push rod, and the matching part has the matching tip at the end away from the extension part.
[0033] For example, the check assembly further comprises a pressing member, the pressing member is connected to the push rod, and the pressing member is connected to the check member, the pressing member is configured to apply a force to the check member to make the matching part abut the bottom of the guide track.
[0034] For example, the pressing member is a torsion spring, one end of the torsion spring is connected to the extension part and applies a force to the extension part to make the fitting part abut against the bottom of the guide rail.
[0035] For example, the extension directions of the mounting part, the extension part and the fitting part are perpendicular to each other, and the torsion spring is wrapped around the mounting part.
[0036] For example, the check assembly further comprises a mounting seat connected to the push rod, the mounting seat comprises a mounting column, the mounting part is inserted into the mounting column, the torsion spring is sleeved on the mounting column, one end of the torsion spring abuts against one side of the extension part away from the check rail, and the other end of the torsion spring is limited by the mounting seat.
[0037] For example, the pressing member is a spring, one end of the spring is connected to the extension part and applies a force to the extension part to make the fitting part abut against the bottom of the guide rail. BRIEF DESCRIPTION OF DRAWINGS
[0038] FIG. 1 A perspective view of a clip applier is provided for some embodiments of the present disclosure;
[0039] FIG. 2 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 1 A partial area view of the clip applier with a hidden side shell is shown, in which the trigger is located in the open position;
[0040] FIG. 3 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 2 An enlarged view of the boxed position is shown;
[0041] FIG. 4 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 3 A sectional view of the A-A section is shown;
[0042] FIG. 5 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 1 A partial area view of the clip applier with a hidden side shell is shown, in which the trigger is located between the open position and the intermediate position, and the fitting part is located in the return rail;
[0043] FIG. 6 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 5 An enlarged view of the boxed position is shown;
[0044] FIG. 7 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 6 A sectional view of the B-B section is shown;
[0045] FIG. 8 A perspective view of a clip applier is provided for some embodiments of the present disclosure; FIG. 1 A partial area view of the clip applier with a hidden side shell is shown, in which the trigger is located in the intermediate position, and the fitting part is located in the return rail;
[0046] FIG. 9 for FIG. 8 A magnified view of the area outlined in the center frame;
[0047] FIG. 10 for FIG. 9 A sectional view of section C-C;
[0048] FIG. 11 for FIG. 1 The diagram shows a portion of the area behind the concealed housing of the clamping pliers, with the trigger in the closed position.
[0049] FIG. 12 for FIG. 11 A magnified view of the area outlined in the center frame;
[0050] FIG. 13 for FIG. 12 Sectional view of section DD;
[0051] FIG. 14 for FIG. 1 The diagram shows a portion of the clamping pliers hidden behind one side of the housing, where the trigger is located between the middle and open positions, and the mating part is located in the return track.
[0052] FIG. 15 for FIG. 14 A magnified view of the area outlined in the center frame;
[0053] FIG. 16 for FIG. 15 A sectional view of section EE;
[0054] FIG. 17 for FIG. 1 A three-dimensional schematic diagram of the check assembly of the clamping clamp shown;
[0055] FIG. 17-A for FIG. 17 A three-dimensional schematic diagram of the clamping element of the check valve assembly shown;
[0056] FIG. 18 for FIG. 17 A three-dimensional schematic diagram of the check valve assembly's check valve guide component;
[0057] FIG. 19 for FIG. 18 A three-dimensional schematic diagram of the anti-return rail component from another angle;
[0058] FIG. 20 for FIG. 18 The front view of the anti-return rail component shown;
[0059] FIG. 21 for FIG. 17 A three-dimensional schematic diagram of the check valve component of the check valve assembly shown;
[0060] FIG. 22 for FIG. 21 A three-dimensional schematic diagram of the check valve shown from another angle;
[0061] FIG. 23 for FIG. 17 A top view of the check valve assembly, including the check valve component, mounting base, and clamping component.
[0062] FIG. 24 A top view of the check valve, mounting base, and clamping member of the clamping clamp provided for other specific embodiments of this disclosure;
[0063] FIG. 25 for FIG. 1 A three-dimensional schematic diagram of the clamp in the clamping pliers shown;
[0064] FIG. 26 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 component and the third reset component are not shown;
[0065] FIG. 27-A for FIG. 26 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.
[0066] FIG. 27-B for FIG. 26 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.
[0067] FIG. 27-C for FIG. 26 The partial cross-sectional view of the clamp body assembly shown shows the trigger in the closed position, and the second and third reset members are not shown.
[0068] FIG. 28 for FIG. 26 The exploded view of the clamp assembly shown is provided, in which the second and third reset components are not shown.
[0069] FIG. 29 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger in the open position;
[0070] FIG. 30 for FIG. 29 A cross-sectional view of a portion of the clamp shown from another direction;
[0071] FIG. 31 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger positioned in the center.
[0072] FIG. 32 for FIG. 31 A cross-sectional view of a portion of the clamp shown from another direction;
[0073] FIG. 33 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger in the closed position;
[0074] FIG. 34 for FIG. 33 A cross-sectional view of a portion of the clamp shown from another direction;
[0075] FIG. 35 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger in the open position;
[0076] FIG. 36 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger positioned in the center.
[0077] FIG. 37 for FIG. 1 The diagram shows a partial cross-sectional view of the clamp, with the trigger in the closed position.
[0078] The reference numerals in the above figures are:
[0079] 100 - Housing;
[0080] 200-Clamping compartment, 201-Bottom, 202-First side, 203-Second side, 204-Limiting barb, 210-Clamp, 211-First clamping arm, 212-Second clamping arm, 213-Connecting part, 214-First ear, 215-Second ear, 216-Clamping part;
[0081] 300-Trigger;
[0082] 400-Clamping body assembly, 410-Push rod, 411-First limiting groove, 412-First pushing part, 413-Second pushing part, 414-Receiving cavity, 415-Pushing surface, 420-Clamping mechanism, 421-Pushing barb, 422-Second limiting groove, 423-Pushing out part, 424-Abutting part, 430-Clamping drive tube, 430a-First clamping drive tube, 430b-Second clamping drive tube, 431-Third limiting groove, 432-Snap-fit protrusion, 433-Abutting end, 440-Sleeve, 441-Snap-fit groove, 450-First reset component, 460-Second reset component, 470-Third reset component, 480-Limiting component;
[0083] 500 - End effector, 510 - First clamping arm, 520 - Second clamping arm;
[0084] 600 - check valve assembly, 610 - check rail member, 611 - forward rail, 611a - proximal extreme position, 611b - forward intermediate position, 612 - return rail, 612a - distal extreme position, 614 - first guide surface, 615 - second guide surface, 616 - ratchet, 616a - second sliding surface, 616b - second abutment surface, 620 - check member, 621 - fitting portion, 621a - fitting tip, 621b - first sliding surface, 621c - first abutment surface, 622 - mounting portion, 623 - extension portion, 630 - mounting seat, 632 - mounting post, 633 - limiting slot, 640 - compression member. DETAILED DESCRIPTION
[0085] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, further detailed description will be made to the present disclosure in combination 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 not used to limit the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present disclosure.
[0086] 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 operation assembly is proximal, and the end effector is distal, for example, the proximal end of a certain part means relatively close to the proximal end of the operation assembly, and the distal end means relatively close to the end effector.
[0087] In the present disclosure, unless otherwise explicitly specified and limited, the terms "connected", "connected" and the like shall be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, can be movably connected, or can be integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements such as abutment. For those skilled 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 a modifier, it has the meaning limited by the corresponding modifier, and only excludes the case that obviously needs to be excluded, and does not exclude other possible cases, for example, "detachably connected" refers to detachable connection, and does not include integration, but movable connection is not excluded.
[0088] The term "axial" refers to the length direction of the jaw assembly 400. The axial direction of the jaw assembly 400 is indicated by the arrow A. FIG. 3 、 FIG. 6 、 FIG. 9 、 FIG. 12 、 FIG. 18The up-down direction is the width direction of the check rail piece 610. FIG. 4 、 FIG. 7 、 FIG. 10 、 FIG. 13 、 FIG. 19 The up-down direction is the height direction of the check rail piece 610.
[0089] The present disclosure is applied to a disposable continuous firing clip applier, a plurality of clips 210 are pre-stored in the clip cartridge 200, for example, the trigger 300 is rotatably connected to the housing 100, the jaw assembly 400 includes a push rod 410, a clip feeding mechanism 420 and a clip applying mechanism, the push rod 410 is connected to the clip feeding mechanism 420 and the clip applying mechanism, and the push rod 410 is configured to move distally along its axial direction under the pushing of the trigger 300 to drive the clip feeding mechanism 420 to move distally so that the clip 210 enters the end effector 500 from the clip cartridge, and drive the clip applying mechanism to move distally so that the end effector 500 is closed.
[0090] In one complete working process, the trigger 300 moves relative to the housing 100 to drive the jaw assembly 400 to start from the initial state, drive the clip 210 in the most distal station to enter the end effector 500 from the clip cartridge 200, drive the clip feeding mechanism 420 to move distally to advance the remaining clips 210 in the clip cartridge 200 by one station, and drive the clip applying mechanism to move distally to close the end effector 500 to close the clip 210 in the end effector 500 to apply the clip 210 to the blood vessel or tissue, and then the clip feeding mechanism 420 and the clip applying mechanism of the jaw assembly 400 move proximally to reset the jaw assembly 400 to the initial state until the clip applier starts the next working process.
[0091] On the basis of realizing the above functions, the specific structure of the clip 210 and the jaw assembly 400 will not affect the action of the check assembly 600, and the present embodiment exemplifies a specific structure of 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.
[0092] In the working process of the above clip applier, the trigger 300 can be rotated in two opposite directions, and correspondingly, the clip feeding mechanism 420 can move distally or proximally, if the trigger 300 has a tendency to rotate in an undesirable direction during the movement of the clip feeding mechanism 420, it will cause the clip feeding mechanism 420 to move in an undesirable direction, which may cause the clips in the clip cartridge 200 to be arranged in disorder.
[0093] Therefore, with reference to the above description of the check assembly 600, the check assembly 600 can be used in the clip applier. FIGS. 1-16The embodiment of the present disclosure provides a clip applier, which comprises a housing 100, a jaw assembly 400, a trigger 300, a clip cartridge 200, an end effector 500 and a check assembly 600.
[0094] The clip cartridge 200 is connected to the housing 100, and the clip cartridge 200 comprises a clip 210; the trigger 300 is movably connected to the housing 100, for example, the trigger 300 is rotatably connected to the housing 100; the jaw assembly 400 is connected to the housing 100, and the jaw assembly 400 comprises a push rod 410 configured to move axially along the push rod 410 under the pushing of the trigger 300 to drive the clip 210 from the clip cartridge 200 into the end effector 500 and drive the end effector 500 to close.
[0095] Referring to FIG. 17 and FIG. 23 , the check assembly 600 comprises a check rail 610 and a check piece 620.
[0096] The check piece 620 is connected to the push rod 410, referring to FIG. 21 and FIG. 22 , the check piece 620 comprises a fitting part 621, and the fitting part 621 has a fitting tip 621a, one side of the fitting tip 621a has a first sliding surface 621b which is obliquely arranged relative to the extension direction of the fitting part 621, and the other side of the fitting tip 621a has a first abutting surface 621c; referring to FIGS. 18-20 , the check rail 610 is connected to the housing 100, and the check rail 610 has a guide rail in which the fitting tip 621a is accommodated, and the bottom of the guide rail is provided with a plurality of ratchets 616 which form a check section, one side of the ratchets 616 has a second sliding surface 616a, and the other side of the ratchets 616 has a second abutting surface 616b, and the fitting tip 621a is configured such that the first sliding surface 621b can slide relative to the second sliding surface 616a and the first abutting surface 621c can abut against the second abutting surface 616b.
[0097] In response to the movement of the trigger 300 in a first direction and the movement of the push rod 410, the push rod 410 drives the check piece 620 to move, and the fitting part 621 moves along the guide rail, when the fitting part 621 is located in the check section, the first sliding surface 621b slides relative to the second sliding surface 616a to make the fitting part 621 move from one side of the ratchets 616 to the other side of the ratchets 616, and the fitting part 621 successively passes through the plurality of ratchets 616; in response to the movement of the trigger 300 in a second direction opposite to the first direction when the fitting part 621 is located in the check section, a force-coupling abutment is formed between the first abutting surface 621c and the second abutting surface 616b to couple, thereby limiting the movement of the trigger 300 in the second direction.
[0098] The setting position of the ratchet 616 can be set according to actual needs, for example, referring to FIGS. 2-16 The trigger 300 has an open position and a closed position, referring to FIGS. 18-20 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 proximal end and the distal end, and the bottom of the forward rail 611 is provided with a check section, that is, the bottom of the forward rail 611 is provided with a plurality of ratchets 616.
[0099] The movement of the trigger 300 from the open position to the closed position is a forward movement, and the movement of the trigger 300 from the closed position to the open position is a reverse movement; the clip applier has a firing state and a reset state.
[0100] In the firing state, referring to FIGS. 2-13 In response to the forward movement of the trigger 300, the trigger 300 pushes the push rod 410 to move distally, the push rod 410 drives the check piece 620 to move distally, and the matching part 621 moves along the forward rail 611 distally, and the matching part 621 moves from the proximal side of the check section to the distal side of the check section after passing through the plurality of ratchets 616; in response to the reverse movement of the trigger 300 by a certain stroke or the reverse movement trend (i.e. the trigger 300 moves slightly in the reverse direction) when the matching part 621 is located in the check section, a force abutment is formed between the first abutment surface 621c and the second abutment surface 616b to be coupled, thereby limiting the reverse movement of the trigger 300;
[0101] In the reset state, referring to FIGS. 11-16 The push rod 410 moves proximally, and the trigger 300 moves reversely, the push rod 410 drives the check piece 620 to move proximally, and the matching part 621 moves proximally along the return rail 612.
[0102] During the distal movement of the clip feeding mechanism 420, after the matching tip 621a passes through the ratchet 616, if the trigger 300 loses power accidentally or is subjected to an external force that tends to move the trigger 300 reversely, the abutment of the matching tip 621a and the ratchet 616 can prevent the matching part 621 from moving proximally, so as to prevent the push rod 410 and the clip feeding mechanism 420 from moving proximally, so that the trigger 300 cannot move reversely to the open position, that is, the abutment of the matching tip 621a and the ratchet 616 can prevent the clip feeding mechanism 420 from moving proximally before the clip 210 is pushed into place, so as to avoid that the clip 210 in the clip cartridge 200 is pushed to be disordered by the clip feeding mechanism 420 moving accidentally, which is beneficial to improve the action stability of the clip applier and reduce the failure rate of the clip applier.
[0103] And, when the first sliding surface 621b of the engaging tip 621a slides against the second sliding surface 616a of one of the ratchets 616 until the engaging tip 621a passes over the ratchet 616, the first abutting surface 621c of the engaging tip 621a abuts against the second abutting surface 616b of the ratchet 616, referring to FIG. 7 , the engaging tip 621a can extend into the space between two adjacent ratchets 616, and the engaging tip 621a is engaged with the ratchets 616 to a deep extent, so that the abutment between the engaging tip 621a and the ratchets 616 is stable.
[0104] Referring to FIGS. 26-28 , the handle assembly 400 further comprises a clip feeding mechanism 420 and a clip applying mechanism, the push rod 410 is connected to the clip feeding mechanism 420 and the clip applying mechanism; the trigger 300 further has an intermediate position between the open position and the closed position, referring to FIG. 20 , the forward travel track 611 has a forward travel intermediate position 611b, when the trigger 300 moves from the open position to the closed position and reaches the intermediate position, the position of the engaging portion 621 is the forward travel intermediate position 611b; a check section is provided at least from the proximal end of the forward travel track 611 to the forward travel intermediate position 611b, that is, a plurality of ratchets 616 are sequentially provided at least from the proximal end of the forward travel track 611 to the forward travel intermediate position 611b. For ease of description, referring to FIG. 20 , when the trigger 300 is in the open position, the engaging portion 621 is located at the proximal end of the forward travel track 611, and the position of the engaging portion 621 is the proximal end limit position 611a; when the trigger 300 is in the closed position, the engaging portion 621 is located at the distal end of the return travel track 612, and the position of the engaging portion 621 is the distal end limit position 612a.
[0105] In the firing state of the clip applier, referring to FIGS. 2-10 , in response to the forward movement of the trigger 300 from the open position to the intermediate position, the trigger 300 drives the push rod 410 to move distally and drives the clip feeding mechanism 420 to move distally relative to the clip cartridge 200 to drive the clip 210 from the clip cartridge 200 into the end effector 500, the check member 620 moves distally to drive the engaging portion 621 to move distally along the forward travel track 611 from the proximal end limit position 611a, and the engaging portion 621 passes over the plurality of ratchets 616 in the check section to reach the forward travel intermediate position 611b; referring to FIGS. 8-13 , in response to the forward movement of the trigger 300 from the intermediate position to the closed position, the trigger 300 drives the push rod 410 to continue to move distally and drives the clip applying mechanism to move distally to drive the end effector 500 to close, and the check member 620 continues to move distally to drive the engaging portion 621 to move from the forward travel intermediate position 611b to the distal end limit position 612a.
[0106] The ratchet teeth 616 are arranged between the proximal limit position 611a and the intermediate position 611b in the delivery process, that is, in the process of driving the delivery mechanism 420 to move distally by the trigger 300 driving the push rod 410, the matching part 621 cooperates with the ratchet teeth 616 to prevent the trigger 300 from returning in the delivery process; after the delivery mechanism 420 has moved distally to the limit position, the trigger 300 continues to drive the push rod 410 to move distally, and the push rod 410 starts to drive the clamping mechanism to move distally. At this time, the matching part 621 has already passed through all the ratchet teeth 616, and the matching part 621 does not need to pass through the ratchet teeth 616 again in the process of moving from the intermediate position 611b to the distal limit position 612a along the delivery track 611, so as to reduce the resistance that the trigger 300 suffers in the clamping process, and make the use of the clamping forceps more labor-saving.
[0107] The more the number of the ratchet teeth 616 is, the more the number of the stop positions is, and the better the non-return effect is; and under the premise that the size of the part for arranging the ratchet teeth 616 is unchanged, the more the number of the ratchet teeth 616 is, the narrower the space between the adjacent ratchet teeth 616 is, and based on this, referring to FIG. 21 and FIG. 22 the first abutting surface 621c of the matching tip 621a is recessed distally, and the recessed first abutting surface 621c can make the matching tip 621a form a sharper shape to adapt to the narrower gap between the ratchet teeth 616, so as to ensure that the matching tip 621a has a deeper occlusion degree with the ratchet teeth 616 in the scheme in which the distance between the ratchet teeth 616 is closer.
[0108] In some embodiments, referring to FIG. 7 and FIG. 10 the bottom of the delivery track 611 is gradually raised from proximal to distal, and as the non-return piece 620 moves distally, the matching part 621 is gradually lifted by the bottom of the delivery track 611, since the non-return piece 620 is connected with the push rod 410, and when the trigger 300 has an undesirable movement trend, the non-return piece 620 has a trend of moving in the opposite direction of the direction in which it should move, so that the force between the second abutting surface 616b of the ratchet teeth 616 and the first abutting surface 621c of the matching tip 621a increases, and the lifted matching part 621 tilts in the direction away from the bottom of the delivery track 611 to the opposite direction of the direction in which the non-return piece 620 should move. The recessed shape of the first abutting surface 621c can be set according to actual needs to ensure that even if the matching part 621 tilts, the first abutting surface 621c and the second abutting surface 616b of the ratchet teeth 616 can still stably abut, avoiding the matching tip 621a slipping off the ratchet teeth 616 when the trigger 300 has an undesirable movement trend.
[0109] For example, a ratchet 616 can also be arranged at the bottom of the return track 612 to prevent the clip feed mechanism 420 from moving distally during the process of returning proximally, which can be arranged and realized in the same way as the above-mentioned solution, and thus will not be described here again.
[0110] A first guide surface 614 is arranged at the proximal end of the return track 612 and the departure track 611, and in response to the movement of the trigger 300 from the open position to the closed position, the cooperating part 621 moves distally and abuts against the first guide surface 614, and the first guide surface 614 makes the cooperating part 621 move distally along the departure track 611. For example, referring to FIG. 18 On both sides of the first guide surface 614, the bottom of the return track 612 is higher than that of the departure track 611, and the position of the first guide surface 614 forms a step, and the first guide surface 614 is the vertical surface of the step.
[0111] A second guide surface 615 is arranged at the distal end of the return track 612 and the departure track 611, and in response to the movement of the trigger 300 from the closed position to the open position, the cooperating part 621 moves proximally and abuts against the second guide surface 615, and the second guide surface 615 makes the cooperating part 621 move proximally along the return track 612. For example, referring to FIG. 19 On both sides of the second guide surface 615, the bottom of the departure track 611 is higher than that of the return track 612, and the position of the second guide surface 615 forms a step, and the second guide surface 615 is the vertical surface of the step.
[0112] The arrangement of the first guide surface 614 and the second guide surface 615 can make the cooperating part 621 have a unique advancing path, and ensure the reliability of the movement of the cooperating part 621, so as to ensure the accuracy of the movement of the check assembly 600.
[0113] During a complete working process of the clip applier, the check member 620 moves along with the movement of the push rod 410, and during the movement, the cooperating part 621 needs to move in the width direction of the check track member 610 and also needs to move in the height direction of the check track member 610, based on which, referring to FIG. 21 and FIG. 22 The check member 620 further comprises a mounting part 622 and an extension part 623, and the mounting part 622, the extension part 623 and the cooperating part 621 are connected in sequence, and in this embodiment, the cooperating part 621 is located distally of the mounting part 622, and in other embodiments, the cooperating part 621 can also be arranged to be located proximally of the mounting part 622; the mounting part 622 is connected to the push rod 410, and the end of the cooperating part 621 distal from the extension part 623 has a cooperating tip 621a.
[0114] For example, the mounting portion 622 can be fixedly connected with the push rod 410, the extension portion 623 is connected with the mounting portion 622 and the cooperation portion 621, the extension portion 623 can be deformed to enable the cooperation portion 621 to move in the width direction and the height direction of the check rail piece 610, the extension portion 623 with a certain length can enable the cooperation portion 621 connected with the distal end of the extension portion 623 to have a certain movement space, so as to realize the movement of the cooperation portion 621 in the width direction and the height direction of the check rail piece 610.
[0115] For example, the mounting portion 622 can be rotatably connected with the push rod 410, the mounting portion 622 rotates relative to the push rod 410 to enable the cooperation portion 621 to move in the width direction and the height direction of the check rail piece 610, the extension portion 623 with a certain length can enable the mounting portion 622 to rotate only by a small angle relative to the push rod 410, so as to drive the cooperation portion 621 connected with the distal end of the extension portion 623 to move a sufficient distance.
[0116] Referring to FIG. 17 and FIG. 23 , the check assembly 600 further comprises a pressing piece 640, the pressing piece 640 is connected with the push rod 410, the pressing piece 640 is connected with the check piece 620, and the pressing piece 640 is configured to apply a force to the check piece 620 to enable the cooperation portion 621 to abut against the bottom of the check rail piece 610, so as to ensure the engagement depth of the cooperation tip 621a and the ratchet tooth 616 when the cooperation portion 621 cooperates with the portion provided with the ratchet tooth 616, and ensure the reliability of the check.
[0117] The pressing piece 640 can be arranged in various ways, in some embodiments, referring to FIG. 17 , FIG. 17-A and FIG. 23 , the pressing piece 640 is a torsion spring, one end of the torsion spring is connected with the extension portion 623 and applies a force to the extension portion 623 to enable the cooperation portion 621 to abut against the bottom of the guide rail, for example, referring to FIG. 17 and FIG. 23 , one end of the torsion spring abuts against the side of the extension portion 623 away from the check rail piece 610; for example, the extension portion 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 extension portion 623 with a force to enable the cooperation portion 621 to abut against the bottom of the check rail piece 610. The other end of the torsion spring is fixed or substantially fixed relative to the push rod 410, for example, the other end of the torsion spring can be fixedly connected with the push rod 410, or the other end of the torsion spring can be limited in a groove structure, etc.
[0118] Referring to FIG. 17 and FIG. 23The extension direction of the mounting portion 622, the extension portion 623, and the matching portion 621 is perpendicular to each other, the torsional spring is wrapped around the mounting portion 622, and the mounting portion 622 can limit the torsional spring to some extent, thereby improving the structural stability of the check assembly 600.
[0119] With reference to FIG. 17 and FIG. 23 The check assembly 600 further comprises a mounting seat 630 connected to the push rod 410. For example, the mounting seat 630 and the push rod 410 can be detachably connected or integrally formed. The mounting seat 630 comprises a mounting column 632, the mounting portion 622 is inserted into the mounting column 632, and the torsional spring is sleeved on the mounting column 632. One end of the torsional spring abuts against one side of the extension portion 623 away from the check rail 610, and the other end of the torsional spring is limited by the mounting seat 630. For example, the mounting seat 630 has a limiting groove 633, the other end of the torsional spring is located in the limiting groove 633, and the inner wall of the limiting groove 633 limits the other end of the torsional spring. The mounting column 632 can provide a mounting position for the mounting portion 622 and the torsional spring, so that the torsional spring is stably wrapped around the mounting portion 622, and the torsional spring will not move in other forms except being twisted by the extension portion 623, thereby improving the structural stability of the check assembly 600.
[0120] In other embodiments, with reference to FIG. 24 The pressing member 640 can also be a spring, one end of the spring is connected to the mounting seat 630, and the other end of the spring contacts the extension portion 623. For example, with reference to FIG. 24 One end of the spring is connected to the mounting seat 630 and located on one side of the extension portion 623 close to the check rail 610, and the other end of the spring is connected to the extension portion 623, so that FIG. 24 As shown by reference, the spring is configured to be stretched when the extension portion 623 rotates upward, so that the spring can provide a force for the extension portion to make the matching portion 621 abut against the bottom of the check rail 610. For example, one end of the spring can be connected to the mounting seat 630 and located on one side of the extension portion 623 away from the check rail 610, and the other end of the spring is connected to the extension portion 623. The spring is configured to be compressed when the extension portion 623 rotates upward, so that the spring can provide a force for the extension portion to make the matching portion 621 abut against the bottom of the check rail 610.
[0121] The structure of the clip 210 in the clip applier, the structure and working mode of the body assembly 400 are introduced below in combination with FIGS. 25-37 some embodiments of the present disclosure. It should be noted that the following content is only an example and does not limit the present disclosure.
[0122] With reference to FIG. 25The clip 210 comprises 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. 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. The two second ear portions 215 protrude relative to the second clip arm 212 on opposite sides of the second clip arm 212.
[0123] 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 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.
[0124] Referring to FIG. 28 The clip bin 200 comprises a bottom portion 201 extending in the axial direction and opposite first and second side portions 202 and 203. Referring to FIG. 30 、 FIG. 32 、 FIG. 34 When the clip 210 is installed in the clip bin 200, the clip 200 is compressed due to the size and internal space of the clip bin 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.
[0125] Referring to FIG. 28 The bottom portion 201 of the clip bin 200 has a plurality of limiting barbs 204 along the length direction thereof. The clip bin 200 is provided with a plurality of workstations for placing the clip 210 along the length direction thereof, and each workstation is provided with one limiting barb 204. Each limiting barb 204 is inclined from the bottom portion 203 of the clip bin 200 toward the distal end of the clip bin 200 and toward the inside of the clip bin 200. The proximal end of each limiting barb 204 is fixed to the bottom portion 203, and the distal end is movable. The distal end of the limiting barb 204 is an inclined end. In this embodiment, the limiting barb 204 is an elastic sheet with the distal end bent upward.
[0126] Referring to FIG. 29 、 FIG. 31 、 FIG. 33When the clip 210 is installed in the clip bin 200, the distal end of each limiting barb 204 abuts the proximal side of the first ear 214 of a clip 210, and the limiting barb 204 can prevent the clip 210 from moving from the current station to the adjacent station in the proximal direction in the clip bin 200. When the clip 210 moves in the distal direction, the clip 210 slides in contact with the limiting barb 204 of the adjacent station in the distal direction, and the limiting barb 204 is pressed toward the bottom 201 of the clip bin 200, so that the clip 210 can smoothly pass through the limiting barb 204 to enter the adjacent station in the distal direction from the current station.
[0127] With reference to FIG. 28 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 the length direction thereof, each of which 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 toward the distal end of the clip feeding mechanism 420 and to 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, and the distal end of the pushing barb 421 is an inclined end, which is inclined toward the inside of the clip bin 200 when the clip feeding mechanism 420 is installed in the clip applier, and in this embodiment, the pushing barb 421 is a flexible sheet with the distal end bent upward.
[0128] With reference to FIG. 29 , FIG. 31 , FIG. 33 When the clip 210 is installed in the clip bin 200, the distal end of each pushing barb 421 is located on the proximal side of the first ear 214 of a clip 210. When the clip feeding mechanism 420 moves in the distal direction, the distal end of each pushing barb 421 abuts the proximal side of the first ear 214 of a clip 210, so that a plurality of clips 210 are simultaneously moved in the distal direction until each clip 210 enters the adjacent station in the distal direction from the current station, and the distal end of the limiting barb 204 of the adjacent station in the distal direction abuts the proximal side of the first ear 214 of the clip 210; and then the clip feeding mechanism 420 moves in the proximal direction, the pushing barb 421 abuts and is pressed by the clip 210, so that the pushing barb 421 is pressed toward the clip feeding mechanism 420, and the pushing barb 421 moves in the proximal direction along the side surface of the clip 210, so that the pushing barb 421 can smoothly pass through the clip 210 and return to the original position.
[0129] With reference to FIG. 28 The distal end of the clip feeding mechanism 420 is provided with a pushing-out portion 423; with reference to FIG. 30 When the trigger 300 is in the open position, the pushing-out portion 423 is located on the proximal side of the clip 210 at the distal end of the clip bin 200; with reference to FIG. 32In 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 pusher 423 abuts against the most distal clip 210 in the clip cartridge 200 and pushes the most distal clip 210 in the clip cartridge 200 into the end effector 500.
[0130] In the above embodiment, the clip feeding mechanism 420 is provided with both the push bar 421 and the pusher 423, so that when the clip feeding mechanism 420 moves distally, the clip feeding mechanism 420 pushes all the clips 210 in the clip cartridge 200 distally by one station distance, and at the same time, the clip 210 in the most distal station in the clip cartridge 200 is pushed into the end effector 500; in other embodiments, the push bar 421 and the pusher 423 can be provided in two different components, when the component provided with the pusher 423 moves distally, the clip 210 in the most distal station in the clip cartridge 200 enters the end effector 500, and when the component provided with the push bar 421 moves distally, all the clips 210 in the clip cartridge 200 move distally by one station distance, the above two actions can be performed in sequence or simultaneously. For example, the clip feeding mechanism 420 is provided with the pusher 423, the push rod 410 is provided with a first rack, and the component provided with the push bar 421 is provided with a second rack, the first rack and the second rack are both engaged with a gear located therebetween, so that the push rod 410 can drive the component provided with the push bar 421 to move, and the moving directions are opposite, so as to drive the component to move distally when the push rod 410 moves proximally, and in turn push all the clips 210 in the clip cartridge 200 to move distally by one station distance.
[0131] It should be noted that in the present disclosure, the action of the check valve assembly 600 is only associated with the component for driving the plurality of clips 210 in the clip cartridge 200 to move distally by one station distance, that is, the check valve assembly 600 can only prevent the component for driving the plurality of clips 210 in the clip cartridge 200 to move distally by one station distance from moving in an undesired direction when the component moves, and the specific structure for driving the plurality of clips 210 in the clip cartridge 200 to move distally by one station distance does not affect the action of the check valve assembly 600, and a person skilled in the art can set it according to actual needs.
[0132] Referring to FIG. 27-A to FIG. 27-B , FIG. 28 , FIGS. 35-37The sending and clamping mechanism 420 is movably connected to the pushing rod 410 and movably connected to the housing 110, the housing 110 comprises a structure for limiting the movement range of the sending and clamping mechanism 420, the driving 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 sending and clamping mechanism 420, and the proximal end abuts against the pushing 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 sending and clamping mechanism 420 moves synchronously with the pushing 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 pushing rod 410 moves relative to the sending and clamping mechanism 420. Referring to FIG. 35 and FIG. 36 , in the process that the trigger 300 moves from the open position to the intermediate position, the sending and clamping mechanism 420 is not limited, so the first reset member 450 maintains the original length, so that the sending and clamping mechanism 420 moves synchronously with the pushing rod 410 to make one clip 210 enter the end effector 500; when the trigger 300 reaches the intermediate position, referring to FIG. 36 , the sending and clamping mechanism 420 is limited and cannot continue to move relative to the housing 110; and then referring to FIG. 27-B to FIG. 27-C , FIG. 36 and FIG. 37 , in the process that the trigger 300 moves from the intermediate position to the closed position, the sending and clamping mechanism 420 no longer moves distally, the pushing rod 410 continues to move distally and abuts against the clip applying drive tube 430, so that the clip applying drive 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.
[0133] Referring to FIGS. 35-37 , the pushing rod 410 has an accommodating cavity 414 extending in the axial direction, the proximal end of the sending and 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 sending and clamping mechanism 420, and the other end abuts against the inner wall of the accommodating cavity 414. This structure layout is more reasonable, which is beneficial to save the space occupied by the driving assembly 400.
[0134] Referring to FIG. 28 , the driving assembly 400 further comprises a first limiting member 480, the pushing rod 410 has a first limiting slot 411 extending in the axial direction, and the sending and clamping mechanism 420 has a second limiting slot 422 extending in the axial direction, referring to FIGS. 35-37The first limiting member 480 is connected to the housing 110 and fixed relative to the housing 110. The first limiting member 480 passes through the first limiting groove 411 and the second limiting groove 422.
[0135] Reference FIG. 35 When the trigger 300 is in the open position, the distal inner wall of the first limiting groove 411 abuts against the first limiting member 480, and the distal inner wall of the second limiting groove 422 abuts against the first limiting member 480; see reference. FIG. 36 When the trigger 300 is in the middle position, the first limiting member 480 is located between the distal inner wall and the proximal inner wall of the first limiting groove 411, and the proximal inner wall of the second limiting groove 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; see reference. FIG. 37 When the trigger 300 is in the closed position, the proximal inner wall of the first limiting groove 411 abuts against the first limiting member 480, at which point the push rod 410 can no longer move distally relative to the housing 110. The cooperation between the first limiting member 480 and the first limiting groove 411 and the second limiting groove 422 can limit the range of motion of the push rod 410 and the clamping mechanism 420, thereby improving the stability of the operation.
[0136] Reference FIG. 27-A to FIG. 27-C , FIG. 28 , FIGS. 35-37 The push rod 410 includes a first push part 412 and a second push part 413. The first push part 412 has a receiving cavity 414, and the second push part 413 has a first limiting groove 411. The proximal end of the second push part 413 is received in the receiving cavity 414. The proximal end of the clamping mechanism 420 is provided with an abutment part 424, which is bent to form a hook shape. The abutment part 424 is received in the receiving cavity 414. (See reference...) FIG. 27-A , FIG. 27-B , FIG. 35 and FIG. 36 During the movement of trigger 300 from the open position to the intermediate position, the abutment part 424 abuts against the proximal end of the second push part 413; refer to FIG. 27-C and FIG. 37 During the process of the trigger 300 moving from the middle position to the closed position, the abutment part 424 separates from the proximal end of the second push part 413.
[0137] Reference FIGS. 35-37 The clamping drive tube 430 is partially housed inside the housing 110. In some embodiments, for ease of installation, refer to... FIG. 28 The clamping drive tube 430 may include two parts: a first clamping drive tube 430a and a second clamping drive tube 430b, which are engaged with each other radially. (See reference...)FIG. 32 and FIG. 34 The end effector 500 comprises a first jaw 510 and a second jaw 520, the proximal ends of the first jaw 510 and the second jaw 520 are rotatably connected to the clip warehouse 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 warehouse 200 and the clip feeding mechanism 420, the proximal end of the sleeve 440 is connected to the clip driving tube 430, and the distal end of the sleeve 440 is matched with the end effector 500.
[0138] When the trigger 300 moves from the intermediate position to the closed position, referring to FIG. 26 , FIG. 27-B , FIG. 27-C and FIG. 34 , the push rod 410 pushes the clip driving tube 430 to move distally, the sleeve 440 is pushed by the clip driving tube 430 to move distally, the proximal ends of the first jaw 510 and the second jaw 520 are accommodated inside the sleeve 440, so that the distal ends of the first jaw 510 and the second jaw 520 approach each other, achieving the closure of the end effector 500.
[0139] Referring to FIG. 28 , the clip driving tube 430 has a third limiting groove 431 extending in the axial direction, in some embodiments, the first clip driving tube 430a and the second clip driving tube 430b both have the third limiting groove 431, referring to FIGS. 35-37 , the first limiting member 480 is inserted into the two third limiting grooves 431.
[0140] Referring to FIG. 35 and FIG. 36 , the distal end inner wall of the third limiting groove 431 abuts against the first limiting member 480 when the trigger 300 is in the open position and in the intermediate position; referring to FIG. 37 , when the trigger 300 is in the closed position, the proximal end inner wall of the third limiting groove 431 abuts against the first limiting member 480, at this time the clip driving tube 430 cannot continue to move distally relative to the housing 110. The cooperation of the first limiting member 480 and the third limiting groove 431 can limit the movement range of the clip driving tube 430, and improve the stability of the action.
[0141] Referring to FIG. 28 , the clip driving tube 430 can also be provided with a fourth limiting groove 432 extending in the axial direction, the sleeve 440 has a fifth limiting groove 441 extending in the axial direction, and the drive assembly 400 further comprises a second limiting member 490, referring to FIGS. 35-37 , the second limiting member 490 is connected to the housing 110 and fixed relative to the housing 110.
[0142] 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 abut against the second limit piece 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 abut against the second limit piece 490.
[0143] With reference to FIGS. 35-37 The drive assembly 400 further comprises a second reset piece 460, which can be a spring. The second reset piece 460 is arranged axially and sleeved on the push rod 410. The distal end of the second reset piece 460 abuts against the housing 110, and the proximal end abuts against the push rod 410. The second reset piece 460 is configured to store energy when the push rod 410 moves distally, and the second reset piece 460 releases the energy by recovering the deformation, thereby providing power for the reset of the push rod 410.
[0144] With reference to FIGS. 35-37 The drive assembly 400 further comprises a third reset piece 470, which can be a spring. The third reset piece 470 is arranged axially and sleeved on the clip applying drive tube 430. The distal end of the third reset piece 470 abuts against the housing 110, and the proximal end abuts against the clip applying drive tube 430. The third reset piece 470 is configured to store energy when the clip applying drive tube 430 moves distally, and the third reset piece 470 releases the energy by recovering the deformation, thereby providing power for the reset of the clip applying drive tube 430.
[0145] In summary, in the clip applier of the present disclosure, when the first sliding surface 621b of the fitting tip 621a slides relative to the second sliding surface 616a of one of the ratchets 616 until the fitting tip 621a passes the ratchet 616, the first abutting surface 621c of the fitting tip 621a abuts against the second abutting surface 616b of the ratchet 616, with reference to FIG. 7 The fitting tip 621a can extend into the space between the two adjacent ratchets 616, and the fitting tip 621a is engaged with the ratchets 616 to a great extent, so that the abutment between the fitting tip 621a and the ratchets 616 is stable.
[0146] 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 specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.
[0147] The above detailed description set forth above in connection with the appended drawings is merely descriptive of the best mode contemplated for carrying out the disclosure and is not intended to limit the scope of the disclosure. It should be understood that the disclosure is capable of further modifications, uses, and / or adaptations other than those specifically set forth herein.
Claims
1. A clip applier, comprising: The clip includes a housing, a jaw assembly, a trigger, a clip cartridge, an end effector and a non-return assembly; The clip cartridge is connected to the housing, and the clip cartridge includes a clip; The trigger is movably connected to the housing; The jaw assembly is connected to the housing, and the jaw assembly includes a push rod configured to move axially distally under the push of the trigger to drive the clip from the clip cartridge into the end effector and to drive the end effector to close; The non-return assembly includes a non-return track member and a non-return member; The non-return member is connected to the push rod, and the non-return member includes a fitting portion having a fitting tip with a first sliding surface obliquely arranged on one side of the fitting tip relative to the extension direction of the fitting portion and a first abutting surface on the other side of the fitting tip; The non-return track member is connected to the housing, and the non-return track member has a guide track in which the fitting tip is accommodated, and a plurality of ratchets are arranged at the bottom of the guide track to form a non-return section, one side of the ratchets has a second sliding surface, and the other side of the ratchets has a second abutting surface, and the fitting tip is configured such that the first sliding surface can slide relative to the second sliding surface of the ratchets and the first abutting surface can abut against the second abutting surface of the ratchets; In response to the movement of the trigger in a first direction and the movement of the push rod, the push rod drives the non-return member to move, the fitting portion moves along the guide track, and when the fitting portion is located in the non-return section, the first sliding surface slides relative to the second sliding surface to move the fitting portion from one side of the ratchets to the other side of the ratchets, and the fitting portion sequentially passes through a plurality of the ratchets; in response to the movement of the trigger in a second direction opposite to the first direction when the fitting portion is located in the non-return section, the first abutting surface and the second abutting surface are coupled to limit the movement of the trigger in the second direction.
2. The clip applier of Claim 1, wherein, The first abutting surface of the fitting tip is recessed.
3. The clip applier of Claim 1, wherein, The trigger has an open position and a closed position, the guide track includes a forward track and a return track, the forward track and the return track are in communication at a distal end, and the bottom of the forward track is provided with the non-return section; The movement of the trigger from the open position to the closed position is a forward movement, and the movement of the trigger from the closed position to the open position is a reverse movement; the clip applier has a firing state and a reset state; In the firing state, in response to the forward movement of the trigger, the trigger pushes the push rod to move distally, the push rod drives the non-return member to move distally, the fitting portion moves along the forward track distally, and the fitting portion moves from the proximal side of the non-return section to the distal side of the non-return section; in response to the reverse movement of the trigger when the fitting portion is located in the non-return section, the first abutting surface and the second abutting surface are coupled to limit the reverse movement of the trigger. In the reset state, the push rod moves proximally, and the trigger moves reversely, the push rod drives the check piece to move proximally, and the matching part moves proximally along the return track.
4. The clip applier of Claim 3, wherein, The handle assembly further comprises a clip feeding mechanism and a clip applying mechanism, the push rod is connected to the clip feeding mechanism and the clip applying mechanism; The trigger further has an intermediate position between the open position and the closed position, the forward track has a forward intermediate position, and the check section is arranged from the proximal end of the forward track to the forward intermediate position; In the firing state, in response to the forward movement of the trigger from the open position to the intermediate position, the trigger drives the push rod to move distally and drives the clip feeding mechanism to move distally relative to the clip cartridge, so as to drive the clip to enter the end effector from the clip cartridge, the check piece moves distally, and the matching part moves distally along the forward track from the proximal end of the forward track to the forward intermediate position, and after the matching part passes the check section, the matching part reaches the forward intermediate position; in response to the forward movement of the trigger from the intermediate position to the closed position, the trigger drives the push rod to continue to move distally and drives the clip applying mechanism to move distally, so as to drive the end effector to close, and the check piece continues to move distally, and the matching part moves from the forward intermediate position to the distal end of the return track.
5. The clip applier of Claim 3, wherein, In the direction from proximal to distal, the bottom of the forward track gradually rises, and the first abutting surface of the matching tip is recessed.
6. The clip applier of Claim 1, wherein, The trigger has an open position and a closed position, the guide track comprises a forward track and a return track, the forward track and the return track are in communication at the distal end, and the bottom of the return track is provided with the check section; The movement of the trigger from the open position to the closed position is forward movement, and the movement of the trigger from the closed position to the open position is reverse movement; the clip applying forceps have a firing state and a reset state; In the firing state, in response to the forward movement of the trigger, the trigger drives the push rod to move distally, and the push rod drives the check piece to move distally, so that the matching part moves distally along the forward track; In the reset state, the push rod moves proximally, and the trigger moves reversely, the push rod drives the check piece to move proximally, and the matching part moves proximally along the return track, and the matching part moves from the distal side of the check section to the proximal side of the check section; in response to the forward movement of the trigger, the first abutting surface and the second abutting surface are coupled to limit the forward movement of the trigger.
7. The clip applier of Claim 6, wherein, The handle assembly further comprises a clip feeding mechanism and a clip applying mechanism, the push rod is connected to the clip feeding mechanism and the clip applying mechanism; The trigger further has an intermediate position between the open position and the closed position, the return track has a return intermediate position, and the check section is arranged from the proximal end of the return track to the return intermediate position; In the reset state, in response to reverse movement of the trigger from the closed position to the intermediate position, the push rod and the clip applying mechanism move proximally, the check member moves proximally, the matching part starts to move proximally along the return track from the distal end of the return track until reaching the return intermediate position; in response to reverse movement of the trigger from the intermediate position to the open position, the push rod and the clip applying mechanism move proximally, the check member continues to move proximally, the matching part moves from the distal side of the check section to the proximal side of the check section, and to the proximal end of the return track.
8. The clip applier of Claim 6, wherein, The bottom of the return track gradually rises in the direction from the distal end to the proximal end, and the first abutting surface of the matching tip is recessed.
9. The clip applier of any one of Claims 3-8, wherein, The forward track and the return track are in communication at the proximal end and the distal end, the forward track and the proximal end of the return track are provided with a first guide surface, in response to forward movement of the trigger from the open position to the closed position, the matching part moves distally and abuts against the first guide surface, and the first guide surface causes the matching part to move distally along the forward track; The forward track and the distal end of the return track are provided with a second guide surface, in response to reverse movement of the trigger from the closed position to the open position, the matching part moves proximally and abuts against the second guide surface, and the second guide surface causes the matching part to move proximally along the return track.
10. The clip applier of Claim 1, wherein, The check member further includes a mounting part and an extension part, the mounting part, the extension part and the matching part are connected in sequence, the mounting part is connected to the push rod, and the matching part has the matching tip at the end away from the extension part.
11. The clip applier of Claim 10, wherein, The check assembly further includes a compression member connected to the push rod and connected to the check member, and the compression member is configured to apply a force to the check member to make the matching part abut against the bottom of the guide track.
12. The clip applier of Claim 11, wherein, The compression member is a torsional spring, one end of the torsional spring is connected to the extension part and applies a force to the extension part to make the matching part abut against the bottom of the guide track.
13. The clip applier of Claim 12, wherein, The mounting part, the extension part and the matching part are perpendicular to each other in the extension direction, and the torsional spring surrounds the mounting part.
14. The clip applier of Claim 13, wherein, The check assembly further includes a mounting seat connected to the push rod, the mounting seat includes a mounting column, the mounting part is inserted into the mounting column, the torsional spring is sleeved on the mounting column, one end of the torsional spring abuts against the side of the extension part away from the check track, and the other end of the torsional spring is limited by the mounting seat.
15. The clip applier of Claim 11, wherein, The compression member is a spring, one end of the spring is connected to the extension part and applies a force to the extension part to make the matching part abut against the bottom of the guide track.