CN116115289A

CN116115289A - Clip applier

Info

Publication number: CN116115289A
Application number: CN202111339817.8A
Authority: CN
Inventors: 孙宝峰; 乔志晨; 程涛
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2023-05-16
Also published as: WO2023083272A1

Abstract

The invention discloses a clip applier, which comprises a jaw assembly and an acted piece, wherein the acted piece is operably positioned in the jaw assembly, the jaw assembly is provided with a stop piece and a release mechanism, the stop piece is abutted with the acted piece so as to keep the acted piece on the jaw assembly, the release mechanism can drive the stop piece to move so as to separate the stop piece from the acted piece, and the acted piece is in a state capable of separating from the jaw assembly, so that when the jaw assembly is opened, the jaw assembly does not pull the acted piece, and the acted piece does not pull tissues or blood vessels, thereby reducing the risk of minimally invasive surgery.

Description

Clip applier

Technical Field

The invention relates to the technical field of medical appliances, in particular to a clip applier.

Background

In minimally invasive surgery, clips are often used to secure tissue or blood vessels with clip appliers to achieve hemostasis and ligation closure. The clip has two clip arms disposed opposite each other, the two clip arms being capable of closing to secure the target tissue therebetween.

Prior to clip application, the clip needs to be pushed inwardly from the clip applier to the distal end of the jaw assembly of the clip applier. The jaw assembly comprises two jawarms, and each jawarms is provided with a stop piece corresponding to the clip. After the clip moves to the distal end of the jaw assembly, the clip arms of the clip abut against their corresponding stops, so that the position of the clip at the distal end of the jaw assembly remains stable.

In the prior art, after the jaw assembly is closed to close the clip, the stop piece still abuts against the clip, so that the clip is difficult to separate from the jaw assembly, and therefore when the jaw assembly is opened, the jaw assembly can generate acting force on the clip, so that the clip is torn on tissues or blood vessels, and the risk of minimally invasive surgery is increased.

Based on the foregoing, there is a need for improvements in clip appliers in the art.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a clip applier, which solves the technical problem that the clip can cause tearing to tissues due to acting force to the clip when the jaw assembly is opened.

The invention is realized by the following technical scheme:

a clip applier comprising a jaw assembly and an acted upon member operably disposed in the jaw assembly, the jaw assembly having a stop member that abuts the acted upon member to retain the acted upon member to the jaw assembly and a release mechanism that is capable of driving movement of the stop member to disengage the stop member from the acted upon member to bring the acted upon member into a state of being disengageable from the jaw assembly.

Preferably, at least one side of the jaw assembly has the release mechanism comprising two release elements, a proximal end of each of which moves in a first direction towards a proximal end of the jaw assembly in response to closure of the jaw assembly.

It is further preferred that the distal ends of the two release elements move towards each other in response to closure of the jaw assembly.

Further preferably, the jaw assembly comprises two jawarms, one of the distal ends of the release elements being pivotally connected to one of the jawarms, the other of the distal ends of the release elements being pivotally connected to the other of the jawarms, the proximal ends of the release elements being pivotally connected.

Further preferably, the stop is operatively engaged with the proximal ends of the release elements, the proximal end of each of the release elements being movable in a first direction toward the proximal end of the jaw assembly to drive the stop proximally to disengage the stop from the acted upon member in response to closure of the jaw assembly.

Further preferably, the jaw assembly comprises two jawarms, each having the stop therein, the proximal ends of the two stops cooperating with the same release mechanism being connected by a hinge.

Further preferably, the release mechanism further comprises a first pin through which proximal ends of two release elements located on the same side of the jaw assembly are pivotally connected, the proximal ends of the release elements being operatively engaged with the hinge by the first pin to drive the stop to move proximally.

Preferably, the jaw assembly comprises two jawarms, the acted-upon member is a clip, and the stop abuts at least a portion of the clip to retain the clip in the jawarms.

Preferably, the jaw assembly comprises two arms, the stop member is arranged on the arms, the acted piece is a clip, the clip comprises two arms, at least one part of one arm is operably positioned in one arm, at least one part of the other arm is operably positioned in the other arm, and the stop member is abutted with the at least one part of the arm; at least one side of the jaw assembly is provided with the release mechanism, the release mechanism comprising two release elements, the stop and proximal ends of the release elements corresponding thereto being operatively engaged, the proximal end of each release element being moved proximally in a first direction in response to closure of the jaw assembly to drive the stop to move proximally to disengage the stop from the at least a portion of the jawarms in which it is located, while distal ends of the two release elements are moved toward each other.

Further preferably, the distal end of one of said release elements is pivotally connected to one of said jawarms, the distal end of the other of said release elements is pivotally connected to the other of said jawarms, and the proximal ends of both of said release elements are pivotally connected.

Further preferably, each of the clip arms has an ear, the at least a portion of the clip arm including the ear.

Further preferably, each of the forceps arms is provided with a chute; the stopper comprises a mounting part and a limiting part, wherein the mounting part is slidably positioned in the chute, a guide space is formed between the limiting part and the bottom of the clamp arm, and the limiting part is used for restraining the lug when the lug moves in the guide space.

Further preferably, when the jaw assembly is in the open state, the distal end of any one of the mounting portions extends from the chute in which the mounting portion is located.

Preferably, the stopper has elasticity.

Further preferably, each of said stops is fixedly connected to the proximal end of the corresponding release element.

Preferably, the release mechanism is arranged on both sides of the jaw assembly.

Compared with the prior art, the invention has the beneficial effects that:

According to the clip applier disclosed by the invention, the release mechanism is arranged on the jaw assembly, and the stop piece is arranged at the same time and can slide between the distal end and the proximal end of the jaw assembly, so that when the jaw assembly is closed, the release mechanism can drive the stop piece to move towards the proximal end of the jaw assembly to be away from the ear of the clip, and therefore, the limiting effect of the stop piece on the ear is relieved, when the jaw assembly is opened, the jaw assembly cannot pull the clamping arm of the clip, and therefore, the clamping arm of the clip cannot pull tissues or blood vessels, and the risk of minimally invasive surgery is reduced.

Drawings

FIG. 1 is a schematic view of a clip applier provided in an embodiment of the invention;

FIG. 2 is a cross-sectional view of a portion of a clip applier provided in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a shaft assembly of a clip applier provided in accordance with an embodiment of the invention, wherein the push clip assembly is not in abutment with a clip;

FIG. 4 is a cross-sectional view of a shaft assembly of a clip applier provided in accordance with an embodiment of the invention, wherein a push clip assembly abuts a clip and pushes the clip into a jaw assembly;

FIG. 5 is a schematic view of a clip according to an embodiment of the present invention;

FIG. 6 is a schematic view of the structure of a jaw assembly of a clip applier of the prior art;

FIG. 7 is a schematic view of a first angle of a jaw assembly according to an embodiment of the present invention, wherein the jaw assembly has a clip therein and the jaw assembly is in an open state;

FIG. 8 is a schematic view of a first angle of a jaw assembly with a clip therein and a closed state, according to an embodiment of the present invention;

FIG. 9 is a first angular cross-sectional view of a jaw assembly provided in accordance with an embodiment of the present invention, wherein the jaw assembly has a clip therein and the jaw assembly is in a closed state;

FIG. 10 is a schematic view of a second angle of a jaw assembly provided in accordance with an embodiment of the present invention, wherein the jaw assembly has a clip therein and the jaw assembly is in an open state;

FIG. 11 is a schematic view of a second angle of a jaw assembly according to an embodiment of the present invention, wherein the jaw assembly is open and no clip is present therein;

FIG. 12 is a first angular cross-sectional view of a jaw assembly according to an embodiment of the present invention, wherein the jaw assembly is free of clips and the jaw assembly is in an open state;

FIG. 13 is a first angular cross-sectional view of a jaw assembly provided in accordance with an embodiment of the present invention, wherein the jaw assembly is clip-free and the jaw assembly is in an open state and wherein no stop is mounted in the jaw assembly;

FIG. 14 is a schematic view of a portion of a second jawarm of a jaw assembly provided in accordance with an embodiment of the present invention;

FIG. 15 is a schematic view of a clip engaging a stop according to an embodiment of the present invention;

FIG. 16 is a schematic view of the principle of motion of the release mechanism of the present invention;

FIG. 17 is a schematic view of a stopper according to an embodiment of the present invention;

FIG. 18 is a schematic view of a second jawarm engaging a release member in accordance with an embodiment of the present invention;

reference numerals of the above drawings: 1-a jaw assembly; 101-a first jawarm; 102-a second jawarm; 103-a stopper; 1031-a hinge; 1032—an installation portion; 1033-a limit part; 104-a depression; 105-bottom; 106-side; 107-sliding grooves; 108-notch;

2-a wrench; 201-pushing part;

3-a housing;

4-a shaft assembly; 401-sleeve; 402-a base; 4021—a guide groove; 4022-a guide ramp; 403-elastic push rod; 404-pushing the clamping blocks;

5-driving the tube; 501-a stop;

6-an elastomer;

7-a clip; 701-a first clamping arm; 702-a second clamp arm; 703-a first ear; 704-a second ear; 705-engaging portion; 706—a connection;

8-a release element; 9-a first pin shaft; 10-a second pin shaft; 11-a third pin shaft; 12-moving member.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is to be understood that the terms "proximal", "posterior" and "distal" and "anterior" are used herein with respect to a clinician manipulating the handles of the clip applier. The terms "proximal", "posterior" and "anterior" refer to the portion proximal to the clinician, and the terms "distal" and "anterior" refer to the portion distal to the clinician. I.e., the handles are proximal and the jaw assembly is distal, e.g., the proximal end of a component represents an end relatively close to the handles and the distal end represents an end relatively close to the jaw assembly. The terms "upper" and "lower" refer to the relative positions of a first jaw arm and a second jaw arm of a jaw assembly, specifically the first jaw arm being "up" and the second jaw arm being "down". However, clip appliers may be used in many orientations and positions, and therefore these terms expressing relative positional relationships are not limited and absolute.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, movably connected, or integrated, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two elements or interaction relationship between the two elements such as abutting. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that, when the terms "connected" and "connected" are used in the meanings defined by the corresponding terms, they are used in the excluding of the obvious cases, and not excluding other possible cases.

The term "axial" as used herein refers to the length of the cannula 401.

Figures 1-4, 7-14 illustrate a surgical instrument, particularly a clip applier, for applying clip 7 to a body, such as a blood vessel or other tissue other than a blood vessel, in accordance with embodiments of the present invention.

Referring with emphasis to fig. 1-2, the clip applier of the present embodiment includes an operating assembly, a shaft assembly 4 extending from the operating assembly, a transmission mechanism, and a jaw assembly 1 disposed at a distal end of the shaft assembly 4.

The operating assembly comprises a housing 3 and a wrench 2, the wrench 2 being movably mounted on the housing 3.

Referring with emphasis to fig. 3, the shaft assembly 4 includes a cartridge, a base 402, a push clip assembly, and a sleeve 401 that fits over the cartridge, the base 402, and the push clip assembly. The base 402 has a relatively strong rigidity, the base 402 is provided with a guide groove 4021 for accommodating the push clamp assembly and axially moving the push clamp assembly, the distal end of the guide groove 4021 is provided with a guide inclined plane 4022, and the guide inclined plane 4022 is arranged at an angle to the axial direction. When the base 402 and cartridge are mounted together, the guide bevel 4022 is inclined distally and toward the cartridge. Before clamping, the clamp 7 is placed in the clamp box, an opening corresponding to the guide inclined plane 4022 is formed in the side wall of the clamp box, and the distal end of the pushing clamp assembly can enter the clamp box from the opening and abut against the clamp 7 at the rear end of the clamp 7 to push the pushing clamp to advance. Specifically, the push-clip assembly includes a resilient push rod 403 and a push-clip block 404 attached to the distal end of the resilient push rod 403. The elastic push rod 403 is formed by laminating a plurality of metal sheets, has elasticity, and can be bent. The resilient push rod 403 and push clamp block 404 are axially movable within the guide groove 4021.

Referring now to fig. 4, when the resilient push rod 403 moves distally until the push clip block 404 abuts against the guide bevel 4022, the resilient push rod 403 begins to bend, the push clip block 404 obliquely enters the cartridge from the opening of the cartridge along the guide bevel 4022, and the clip 7 in the cartridge is pushed forward by abutting the clip 7 at the rear end thereof, so that the clip 7 enters the jaw assembly 1. After the clip 7 is advanced into the jaw assembly 1, the push block 404 at the distal end of the resilient push rod 403 continues to abut the clip 7 from the rear end of the clip 7 to prevent the clip 7 from moving proximally (i.e., rearward) during clip application. The jaw assembly 1 is closed so that the clip 7 is closed, and when the jaw assembly 1 is opened again, the elastic push rod 403 moves proximally in the axial direction in the guide groove 4021, and drives the push clamp block 404 to retract from the opening into the guide groove 4021 along the guide inclined surface 4022. A push-clip driving mechanism is provided in the shaft assembly 4 to apply force to the resilient push rod 403, and the push-clip driving mechanism is capable of pushing the resilient push rod 403 to move distally (i.e., forward) or proximally.

Referring to fig. 1-2, the jaw assembly 1 includes a first jaw arm 101 and a second jaw arm 102, each pivotally connected to the shaft assembly 4. The transmission mechanism comprises a jaw driving mechanism. The jaw drive mechanism includes a drive tube 5 and a sleeve 401. The drive tube 5 is housed within the housing 3 of the operating assembly, the proximal end of the cannula 401 is connected to the drive tube 5, and the distal end of the cannula 401 mates with the jaw assembly 1. Specifically, the two jawarms of the jaw assembly 1 have an elastic member therebetween, and when the sleeve 401 is moved distally, the jaw assembly 1 can be received in the sleeve 401 from the distal end of the sleeve 401, the elastic member is compressed, the jaw assembly 1 is closed, and when the sleeve 401 is moved proximally, the jaw assembly 1 can be extended from the distal end of the sleeve 401, and the elastic member releases energy to open the jaw assembly 1. The elastic piece can be a spring. The sleeve 401 also forms part of the shaft assembly 4.

One end of the wrench 2 is provided with a pushing portion 201, and the pushing portion 201 is located in the housing 3. The movable member 12 is provided at the proximal end of the drive tube 5, and the pushing portion 201 abuts against one end of the movable member 12 away from the drive tube 5. Thus, by pressing the wrench 2, the pushing portion 201 can be made to push the mover 12 to move distally, and the mover 12 can push the driving tube 5 and the sleeve 401 to move distally.

The outer part of the driving tube 5 is sleeved with an elastic body 6. The proximal end of the elastic body 6 abuts against a stop 501 on the outer surface of the drive tube 5, and the distal end of the elastic body 6 abuts against the inner wall of the housing 3 of the clip applier. When the wrench 2 is pressed, the pushing portion 201 pushes the driving tube 5 to move distally, the sleeve 401 can be moved distally to close the first and second jawarms 101 and 102, and the elastic body 6 stores energy. When the wrench 2 is released, the elastic body 6 releases energy to move the drive tube 5 proximally to reset, so that the sleeve 401 moves proximally to open the first and second jawarms 101 and 102. In this embodiment, the elastic body 6 may be a spring.

In this embodiment, the clip applier also includes an acted upon member that is operably positioned within the jaw assembly 1. The member to be acted upon in this embodiment is a clip 7. A clamp 7 may be supported between the first jaw arm 101 and the second jaw arm 102. The jaw assembly 1 is switched between an open state and a closed state. The open state of the jaw assembly 1 includes an open-to-bottom state in which the distal ends of the first and second jawarms 101 and 102 are at a maximum distance in the up-down direction. In the closed state of the jaw assembly 1, the distal ends of the first and

second jawarms

101, 102 are at a minimum distance in the up-down direction, and closure of the jaw assembly 1 causes the clip 7 to transition from the open state to the closed state.

Referring to fig. 5, the clip 7 includes two clip arms and a connecting portion 706 between the two clip arms. Two arms, a first arm 701 and a second arm 702. The first clamp arm 701 and the second clamp arm 702 are pivotable relative to each other about a connection 706. The first clamping arm 701 has two first ears 703 at one end far away from the connecting portion 706, one first ear 703 is disposed on one side of the first clamping arm 701, and the other first ear 703 is disposed on the opposite side of the first clamping arm 701. The second arm 702 has a clamping portion 705 at one end thereof away from the connecting portion 706, two second ears 704 are disposed at the position of the second arm 702 adjacent to the clamping portion 705, one second ear 704 is disposed at one side of the second arm 702, and the other second ear 704 is disposed at the opposite side of the second arm 702. Prior to clamping, the clip 7 is placed in a cartridge within the shaft assembly 4, and the second ear 704 of the clip 7 can form a stop structure with the cartridge to retain the clip 7 in the cartridge.

Upon clamping, the push block 404 at the distal end of the resilient push rod 403 pushes the clip 7 into the jaw assembly 1 such that the two first ears 703 of the clip 7 are operatively positioned in the first jawarm 101 and the two second ears 704 are operatively positioned in the second jawarm 102. After the clip 7 is clamped in the jaw assembly 1, the jaw assembly 1 is closed to close the clip 7, and the jaw assembly 1 is opened to disengage the clip 7 from the jaw assembly 1, thereby completing the clamping. Specifically, when the first and

second jawarms

101, 102 are closed, the clip 7 in the jaw assembly 1 is brought about to transition from an open state to a closed state. The engaging portion 705 of the second clamp arm 702 can be engaged between the two first ears 703 of the first clamp arm 701 when the clamp 7 is in the closed state, so that the first clamp arm 701 and the second clamp arm 702 are sufficiently clamped, and a blood vessel or tissue placed between the first clamp arm 701 and the second clamp arm 702 can be effectively clamped, and hemostasis is achieved.

Since the clip 7 is placed in the cartridge in the shaft assembly 4 of the clip applier prior to clip application. The clip 7 is compressed and stored in the cartridge, limited by the size and internal space of the cartridge. Compressed means that the two arms of the clip 7 are close to each other but do not engage. Since the clip 7 continues to be compressed for a period of time from assembly to use of the cartridge, there is still a tendency for the clip 7 to remain in the compressed shape after being pushed out into the jaw assembly 1, which has a certain impact on its use.

Fig. 6 shows a jaw assembly of a clip applier of the prior art, in which the first jawarms 101 are configured identically to the second jawarms 102, and the second jawarms 102 are configured in a manner that is emphasized by the present invention.

The second jawarm 102 includes a base 105, one side 106 disposed on one side of the base 105, and another side 106 disposed on the other side of the base. The distal end of the second jawarm 102 is provided with two recesses 104 corresponding to the two second ears 704 of the second jawarm 702, one recess 104 being provided on one side 106 of the second jawarm 102 and the other recess 104 being provided on the other side 106 of the second jawarm 102. After the clip 7 is pushed from the clip box of the shaft assembly 4 to the jaw assembly 1 by the pushing block 404 at the distal end of the elastic push rod 403, each first ear 703 is accommodated in the corresponding recess 104 in the first forceps arm 101, and each second ear 704 is accommodated in the corresponding recess 104 in the second forceps arm 102. To overcome the technical problem of the clip 7 still maintaining its compressed shape after being pushed out, which affects its use, the clip applier of the prior art has two stops 103 provided in the first jawarm 101 to cooperate with the two first ears 703, respectively. Two stops 103 are also provided in the second jawarm 102 to cooperate with two second ears 704, respectively. Each of the stoppers 103 is elastic.

Each of the stoppers 103 in the second jawarm 102 is disposed substantially along the extending direction of the second jawarm 102. A stop 103 is disposed adjacent one side 106 of the second jawarm 102 and is fixedly attached at a proximal end to the side 106 and movable up and down at a distal end. The other stopper 103 is disposed near the other side portion 106 of the second jawarm 102, and has a proximal end fixedly connected to the side portion 106 and a distal end movable up and down. A guide space is formed between each stopper 103 and the bottom 105 of the second jawarm 102. Thus, as the clip 7 moves in the jaw assembly 1, the first clamping arm 701 moves generally between the two stops 103 in the first clamping arm 101, with each first ear 703 of the first clamping arm 701 moving within its corresponding guide space. Likewise, as the clip 7 moves in the jaw assembly 1, the second clamping arm 702 moves generally between the two stops 103 in the second jawarm 102, and each second ear 704 of the second clamping arm 702 moves within its corresponding guide space. Thus, each stop 103 in the first jawarm 101 can act as a stop for its corresponding first ear 703 during distal movement of the first arm 701, and each stop 103 in the second jawarm 102 can act as a stop for its corresponding second ear 704 during distal movement of the second arm 702, so that the first arm 701 and the second arm 702 can be gradually expanded to resume their open shape, thereby overcoming the technical problem that the clip 7 remains compressed after being pushed out, affecting its use. When each first ear 703 moves into its corresponding recess 104 in the first jawarm 101 and each second ear 704 moves into its corresponding recess 104 in the second jawarm 102, the distal end of each stop 103 abuts against its corresponding ear in the jaw arm to hold the clip 7 stably in the jaw assembly 1.

In the clip applier of the prior art, the proximal end of the stopper 103 in the first jawarm 101 is fixedly connected to the corresponding side 106, and the stopper 103 cannot move in the extending direction of the first jawarm 101, i.e., the stopper 103 cannot move toward the proximal end or the distal end. Likewise, the stop 103 in the second jawarm 102 cannot move proximally or distally. Thus, when the jaw assembly 1 is closed, such that the first clamping arm 701 and the second clamping arm 702 are closed, and the clip 7 is clamped on the tissue or the blood vessel, the phenomenon that the first ear 703 is not separated from the stop member 103 and the second ear 704 is not separated from the stop member 103 easily occurs, so that when the jaw assembly 1 is opened, the stop member 103 can exert force on the clamping arm of the clip 7, which causes the clip 7 to be difficult to separate from the jaw assembly 1, and the clip 7 tears the tissue or the blood vessel, thereby increasing the risk of the minimally invasive surgery.

The present embodiment improves upon clip appliers in order to overcome the technical problem of the prior art that clip 7 is difficult to disengage from jaw assembly 1.

Referring to fig. 7-9, in this embodiment, the jaw assembly 1 has a stop 103 and a release mechanism, the stop 103 being capable of abutting the clip to retain the clip to the jaw assembly 1. Due to the limit of the stop 103, the clip is difficult to disengage from the jaw assembly 1. Thus, the jaw assembly 1 of the present embodiment has a release mechanism capable of driving the stopper 103 to move so as to disengage the stopper 103 from the clip, thereby releasing the restriction of the clip by the stopper 103 and bringing the clip into a state of being disengaged from the jaw assembly. The clip is in a state of being separated from the jaw assembly, namely, the clamped object (tissue or blood vessel) can be separated from the jaw assembly 1 under the action of the clamped object without damaging the clamped object.

In this embodiment, the structure of the first jawarm 101 is the same as that of the second jawarm 102, and this embodiment focuses on the structure of the first jawarm 101.

Referring with emphasis to fig. 10, 13, 14, the first jawarm 101 has a base 105 and two sides 106, one side 106 being provided on one side of the base 105 and the other side 106 being provided on the other side of the base 105. The base 105 and the two sides 106 are such that the first jawarm 101 is generally U-shaped in cross section.

Referring with great emphasis to fig. 10-14, in order to better accommodate the first ear 703 of the clip 7 in the first jawarm 101, two recesses 104 are provided at the distal end of the first jawarm 101. One recess 104 is provided on one side 106, and the other recess 104 is provided on the other side 106. One first ear 703 can be operably received in one recess 104 of the first jawarm 101 and the other first ear 703 can be operably received in the other recess 104 of the first jawarm 101. Likewise, one second ear 704 can be operably received in one recess 104 of the second jawarm 102 and the other second ear 704 can be operably received in the other recess 104 of the second jawarm 102.

Referring to fig. 10-12, one stop 103 is mounted in each side 106 of the first jawarm 101. Referring to fig. 13 with emphasis, the inner wall of each side portion 106 of the first jawarm 101 is provided with a chute 107, each chute 107 being disposed substantially along the extension of the side portion 106 in which it is located. 13-14, a chute 107 is formed in the inner wall of each side portion 106 of the second jawarm 102, each chute 107 being disposed generally along the extension of the side portion 106 in which it is disposed. Specifically, referring to fig. 17, each stopper 103 includes a mounting portion 1032 and a stopper portion 1033, the mounting portion 1032 is mounted in the slide groove 107 of the corresponding side portion 106, the stopper portion 1033 is located outside the slide groove 107 corresponding thereto, and a guide space is formed between the stopper portion 1033 and the bottom portion 105. For each stop 103 in the first jawarm 101, a guiding space is formed between the limit part 1033 and the bottom 105 of the first jawarm 101, which is matched with the first ear 703, and the mounting part 1032 of each stop 103 can slide in the chute 107 where it is located, so that the stop 103 as a whole can slide between the distal end and the proximal end of the first jawarm 101. Similarly, for each stop 103 in the second jawarm 102, the stop 1033 thereof forms a guide space with the bottom 105 of the second jawarm 102 that mates with the second ear 704, and each stop 103 is also slidable between the distal and proximal ends of the second jawarm 102.

When the jaw assembly 1 is in the open state, the distal end of the mounting portion 1032 of each stop 103 extends from the distal end of the chute 107 in which it is positioned, such that the chute 107 does not limit the distal end of the mounting portion 1032 of the stop 103 in an up-and-down direction, such that the distal end of each stop 103 is movable up-and-down. Specifically, referring to fig. 14, the inner wall of each side portion 106 of the second jawarm 102 is provided with a notch 108, the notch 108 is disposed at the distal end of the chute 107, and the distal end of the mounting portion 1032 of the stopper 103 extends from the distal end of the chute 107 to be located above the notch 108. The notch 108 allows the inner wall of the side portion 106 of the second jawarm 102 to clear the mounting portion 1032 of the stop 103 so that the side portion 106 of the second jawarm 102 does not limit the distal end of the mounting portion 1032 of the stop 103 in the up-down direction. Similarly, the side portion 106 of the first jawarm 101 does not limit the distal end of the mounting portion 1032 of the stopper 103 in the up-down direction.

Each of the stoppers 103 is elastic, that is, the mounting portion 1032 and the stopper portion 1033 of the stopper 103 are elastic. The mounting portion 1032 and the stopper portion 1033 of the stopper 103 of the present embodiment are integral. The elasticity of the stopper 103 means that the material of the stopper 103 has elasticity, and the material includes but is not limited to metal. Since the stopper 103 has elasticity, the ear portion of the clip 7 can be restrained by the stopper portion 1033 when moving in the guide space corresponding thereto, so that the clip 7 can be held in the guide space during the movement in the distal direction, and the first clip arm 701 and the second clip arm 702 can be gradually expanded to resume their open shapes. Since the distal end of the stopper 103 (can move up and down when the jaw assembly 1 is in the open state, the limit portion 1033 can make room for the corresponding ear portion to leave the guide space smoothly and enter the recess 104 of the jawarm when each first ear portion 703 enters the recess 104 corresponding thereto while each second ear portion 704 enters the recess 104 corresponding thereto, the distal end of each stopper 103 abuts against the corresponding ear portion.

Since each stop 103 is slidable between the distal and proximal ends of its corresponding jaw arm, each stop 103 is movable toward the proximal end of the jaw assembly 1 away from the ear of the clip 7 when the jaw assembly 1 is closed to close the clip 7, thereby releasing the limiting effect of the stop 103 on the ear so that the stop 103 does not exert a force on the jaw arm of the clip 7 when the jaw assembly 1 is opened.

To move the stopper 103, the jaw assembly 1 of the present embodiment is provided with a release mechanism. With reference to the angle of placement of the clip applier in fig. 1, the jaw assembly 1 has opposite first and second sides in a second direction. The second direction is a direction perpendicular to the paper surface, and the second direction is perpendicular to the axial direction of the sleeve 401.

The present embodiment is provided with release mechanisms on both the first and second sides of the jaw assembly 1.

With particular reference to fig. 7-11, each release mechanism comprises two release elements 8. The two release elements 8 in each release mechanism are located on the same side of the jaw assembly 1. For two release elements 8 located on the same side of the jaw assembly 1, the distal end of one release element 8 is pivotally connected to the side 106 of the first jawarm 101 by means of a second pin 10, and the distal end of the other release element 8 is pivotally connected to the side 106 of the second jawarm 102 by means of a third pin 11, thereby enabling the release element 8 connected to the first jawarm 101 to rotate about the second pin 10 and the release element 8 connected to the second jawarm 102 to rotate about the third pin 11.

The release mechanism further comprises a first pin 9. The proximal ends of the two release elements 8 on the same side of the jaw assembly 1 are pivotally connected by a first pin 9, thereby enabling the proximal ends of both release elements 8 to rotate about the first pin 9. In particular, the first pin 9 passes through the proximal ends of the two release elements 8 in sequence, i.e. the two release elements 8 are stacked, enabling a more flexible rotation of the two release elements 8 without interference with each other. With particular reference to figures 10-11 and 18, one release element 8 is provided on the outer wall of the side portion 106 of the first jawarm 101 and the other release element 8 is provided on the outer wall of the side portion 106 of the second jawarm 102. The release element 8 connected to the second jawarm 102 is stacked on the release element 8 connected to the first jawarm 101. For the release element 8 connected to the second jawarm 102, a first predetermined distance S is provided between it and the outer wall of the side 106 of the second jawarm 102 in the second direction to accommodate the mounting of the release element 8 connected to the first jawarm 101, whereby the release element 8 connected to the second jawarm 102 does not squeeze the release element 8 connected to the first jawarm 101, avoiding that the two release elements 8 interfere with each other during rotation. The distal end of the release element 8 connected to the second jawarm 102 is connected to the second jawarm 102 by a third pin 11, and by adjusting the third pin 11, a first predetermined distance S can be provided between the distal end of the release element 8 and the second jawarm 102.

Since the second pin 10 and the third pin 11 are fixed to the first jawarm 101 and the second jawarm 102, respectively, the first jawarm 101 and the second jawarm 102 can respectively drive the distal ends of the two release elements 8 to move, thereby moving the proximal ends of the two release elements 8. Specifically, the first and

second jawarms

101, 102 of the jaw assembly 1 are pivotally connected to the shaft assembly 4, the proximal end of each of the jawarms having a pivot point, the proximal end of each of the jawarms being coupled to the shaft assembly 4 by its pivot point, the first jaw arm 101 rotating about its pivot point, the second jaw arm 102 also rotating about its pivot point such that the first and

second jaw arms

101, 102 are closed or open. With particular reference to fig. 16, in response to the closing or opening of the jaw assembly 1, the distal end of each release element 8 moves about the pivot point of the jawarm on which it is located, synchronously, the proximal end of each release element 8 moves in the first direction. The trajectory of movement of the distal end of each release element 8 is arcuate. The first direction is generally parallel to the axial direction of cannula 401, with reference to the placement direction and angle of the clip applier in fig. 1.

With particular reference to fig. 16, in response to the closure of the jaw assembly 1, the distal ends of the two release elements 8 are moved towards each other, the proximal end of each release element 8 being movable in a first direction towards the proximal end of the jaw assembly 1 to generate a displacement d.

In particular, with particular reference to fig. 7-8, the first jawarm 101 is positioned above the second jawarm 102 and the distal end of each release element 8 coupled to the first jawarm 101 moves generally downward and the distal end of each release element 8 coupled to the second jawarm 102 moves generally upward as the jaw assembly 1 is closed and the proximal end of each release element 8 moves in a first direction toward the proximal end of the jaw assembly 1. When the jaw assembly 1 is opened, the distal end of each release element 8 connected to the first jawarm 101 moves generally upward to reset, the distal end of each release element 8 connected to the second jawarm 102 moves generally downward to reset, and the proximal end of each release element 8 moves in a first direction toward the distal end of the jaw assembly 1 to reset.

With particular reference to fig. 7 and 12, one stop 103 of the first jawarm 101 is operatively engaged with a release mechanism on one side of the first jawarm 101 and the other stop 103 is operatively engaged with a release mechanism on the other side of the first jawarm 101. One stop 103 of the second jawarm 102 is operatively engaged with a release mechanism on one side of the second jawarm 102 and the other stop 103 is operatively engaged with a release mechanism on the other side of the second jawarm 102. Specifically, each stop 103 near the first side of the jaw assembly 1 is operatively engaged with the proximal end of at least one release element 8 on the first side of the jaw assembly 1, and each stop 103 near the second side of the jaw assembly 1 is operatively engaged with the proximal end of at least one release element 8 on the second side of the jaw assembly 1. Thus, when the proximal end of each release element 8 moves towards the proximal end of the jaw assembly 1, each stop 103 can be driven towards the proximal end of the jaw assembly 1, so that the stop 103 can be separated from the corresponding ear, and the limitation of the ear can be released, so that the clip 7 can be separated from the jawarms.

Referring with great reference to fig. 7, 9 and 15, each stop 103 in the first jaw arm 101 is connected to its corresponding stop 103 in the second jaw arm 102, and in particular, the proximal end of the stop 103 in the first jaw arm 101 near the first side of the jaw assembly 1 is connected to the proximal end of the stop 103 in the second jaw arm 102 near the first side of the jaw assembly 1, whereby the proximal ends of the two stops 103 near the first side of the jaw assembly 1 form a hinge 1031. The hinge portion 1031 may be formed in an arc shape integrally as shown in fig. 15, or may be hinged in a form including a hinge. The hinge 1031 is in this embodiment in the form of an integrally formed arc, i.e. each stop 103 in the first jawarm 101 is integral with its corresponding stop 103 in the second jawarm 102. Likewise, the proximal end of the stop 103 in the first jawarm 101 adjacent the second side of the jaw assembly 1 and the proximal end of the stop 103 in the second jawarm 102 adjacent the second side of the jaw assembly 1 are integrally connected. Thereby, the proximal ends of the two stops 103 near the second side of the jaw assembly 1 also form a hinge 1031 of similar construction.

Since the first and second sides of the jaw assembly 1 are provided with release mechanisms, the first and second sides of the jaw assembly 1 are provided with first pins 9. The first pin 9 on the first side of the jaw assembly 1 is operatively engaged with the hinge 1031 adjacent the first side of the jaw assembly 1 and the first pin 9 on the second side of the jaw assembly 1 is operatively engaged with the hinge 1031 adjacent the second side of the jaw assembly 1.

Specifically, the first pin 9 located on the first side of the jaw assembly 1 cooperates with the hinge portion 1031 adjacent to the first side of the jaw assembly 1 in the following manner: the first pin 9 located on the first side of the jaw assembly 1 extends towards the hinge 1031 near the first side of the jaw assembly 1, such that the first pin 9 is at least partially located between the two stops 103 near the first side of the jaw assembly 1, and when the jaw assembly 1 is in the open state, a second predetermined distance is provided between the first pin 9 and the hinge 1031, whereby, when the jaw assembly 1 is closed, the release element 8 drives the first pin 9 to move proximally, the first pin 9 can move to abut against the hinge 1031 near the first side of the jaw assembly 1, and further drive the hinge 1031 to move proximally. The first pin 9 on the second side of the jaw assembly 1 is engaged with the hinge 1031 near the second side of the jaw assembly 1 in the same manner as described above, and will not be described again. It should be noted that, in this embodiment, a second preset distance is provided between the first pin 9 and the corresponding hinge portion 1031, and the second preset distance may be 0.

Thus, in response to closure of the jaw assembly 1, the proximal end of each release element 8 moves in a first direction towards the proximal end of the jaw assembly 1, such that the first pin 9 connected thereto moves towards the proximal end of the jaw assembly 1, thereby bringing the two stops 103 connected thereto towards the proximal end of the jaw assembly 1, such that each stop 103 can be disengaged from an ear, such that the clip 7 can be disengaged from the jawarm.

Specifically, when the jaw assembly 1 is closed, the distal ends of the two release elements 8 on the same side of the jaw assembly 1 are moved towards each other, such that the proximal end of each release element 8 moves towards the proximal end of the jaw assembly 1 in a direction parallel to the axial direction of the cannula 401, thereby moving the first pin 9 towards the proximal end of the jaw assembly 1, thereby enabling each stop 103 to move towards the proximal end to disengage the ear under the influence of its corresponding first pin 9.

When the jaw assembly 1 is opened, the distal ends of the two release elements 8 on the same side of the jaw assembly 1 are moved away from each other such that the proximal end of each release element 8 is moved towards the distal end of the jaw assembly 1 in a direction parallel to the axial direction of the cannula 401, thereby moving the first pin 9 towards the distal end of the jaw assembly 1. Since each stop 103 is resilient and the two stops 103 are integral near the same side of the jaw assembly 1, the hinge 1031 is compressed when the jaw assembly 1 is closed and the hinge 1031 releases energy when the jaw assembly 1 is opened so that each stop 103 can be moved distally to reset.

When the jaw assembly 1 is closed, the clip 7 is secured to the tissue or blood vessel, and the stop 103 is disengaged from the ear of the clip 7. When the jaw assembly 1 is opened but not reached to the bottom, the stopper 103 moves distally but is not reset, and a distance exists between the stopper 103 and the ear of the clip 7, so that the stopper 103 does not exert a restraining effect on the ear of the clip 7 and the clip 7 can be disengaged from the jaw assembly 1, while the stopper 103 and the ear are still disengaged. The arms of the clip 7 have been disengaged from the corresponding arms before the jaw assembly 1 reaches the open-to-bottom condition, when the jaw assembly 1 reaches the open-to-bottom condition, the stop 103 is reset.

The release mechanism and the hinge 1031 corresponding thereto are not connected, whereby the installation can be facilitated and the installation step can be simplified. In an alternative embodiment, the first pin 9 on the first side of the jaw assembly 1 is connected to the hinge 1031 adjacent the first side of the jaw assembly 1, and the first pin 9 on the second side of the jaw assembly 1 is connected to the hinge 1031 adjacent the second side of the jaw assembly 1. Thus, when the jaw assembly 1 is closed, each first pin 9 moves toward the proximal end of the jaw assembly 1, such that each stop 103 can be moved toward the proximal end of the jaw assembly 1 to disengage the ear by the first pin 9 corresponding thereto. When the jaw assembly 1 is opened, the hinge 1031 releases energy such that each stop 103 can move toward the distal end of the jaw assembly 1, while each first pin 9 moves toward the distal end of the jaw assembly 1, bringing each stop 103 to move toward the distal end of the jaw assembly 1 for return.

When the jaw assembly 1 is closed, each stopper 103 moves proximally out of engagement with its corresponding clip ear, and both the two first ears 703 and the two second ears 704 of the clip 7 are always disposed in the corresponding recesses 104 until the jaw assembly 1 is opened, and both the two first ears 703 and the two second ears 704 are respectively disengaged from the corresponding recesses 104. And the closing of the jaw assembly 1 is a quick closing process, if the ear of the clip 7 is separated from the stop member 103 before the jaw assembly 1 is completely closed, the time difference from the separation of the ear of the clip 7 from the stop member 103 to the arrival of the jaw assembly 1 at the completely closed state is small, and the ear of the clip 7 can still be normally closed after the separation from the stop member 103. In summary, the closing of the clip 7 is not affected whenever the ears of the clip 7 are disengaged from the stops 103 during the closing of the jaw assembly 1. During the proximal movement of the jaw assembly 1, a portion of the mounting 1032 of the stopper 103 slides out of the proximal end of the chute 107, and during the distal movement of the stopper 103, the sliding portion 1032 of the stopper 103 re-enters the chute 107, and the stopper 103 deforms. Since each stopper 103 is elastic, deformation of the stopper 103 during movement can be satisfied.

This embodiment is most preferred to provide a release mechanism on both the first and second sides of the jaw assembly 1, and in some alternative embodiments, only one side of the jaw assembly 1. The description is here given of the case where the first side of the jaw assembly 1 has a release mechanism and the second side of the jaw assembly 1 does not have a release mechanism: when the jaw assembly 1 is closed, the release mechanism on the first side of the jaw assembly 1 drives the two stop members 103 to move proximally, so that the two stop members are separated from the corresponding ears respectively, the resistance of the clip 7 separated from the jaw assembly 1 is reduced, and the tearing of the clip 7 to tissues or blood vessels when the jaw assembly 1 is opened is relieved. The first pin 9 of the release mechanism may or may not be connected to the hinge 1031 of the two stops 103, without affecting the fit between the first pin 9 and the hinge 1031.

To sum up, in this embodiment, by providing the release mechanism on the jaw assembly 1, and simultaneously providing the stopper 103 capable of sliding between the distal end and the proximal end of the jaw assembly 1, when the jaw assembly 1 is closed, the release mechanism can drive the stopper 103 to move toward the proximal end of the jaw assembly 1 to separate from the ear of the clip 7, thereby releasing the restriction of the stopper 103 on the clip, when the jaw assembly 1 is opened, the jaw assembly 1 will not pull the arm of the clip 7, so that the arm of the clip 7 will not pull the tissue or the blood vessel, and the risk of minimally invasive surgery is reduced.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A clip applier comprising a jaw assembly and an acted upon member operatively disposed in the jaw assembly, wherein the jaw assembly has a stop member that abuts the acted upon member to retain the acted upon member to the jaw assembly and a release mechanism that is capable of driving the stop member to move to disengage the stop member from the acted upon member to bring the acted upon member into a state in which it may be disengaged from the jaw assembly.

2. The clip applier of claim 1, wherein at least one side of said jaw assembly has said release mechanism, said release mechanism comprising two release elements, a proximal end of each of said release elements moving in a first direction toward a proximal end of said jaw assembly in response to closure of said jaw assembly.

3. The clip applier of claim 2, wherein distal ends of both said release elements move toward each other in response to closure of said jaw assembly.

4. The clip applier of claim 2, wherein said jaw assembly comprises two jawarms, a distal end of one said release member being pivotally connected to one said jawarms, a distal end of the other said release member being pivotally connected to the other said jawarms, proximal ends of two said release members being pivotally connected.

5. The clip applier of claim 2, wherein said stop members are operatively engaged with proximal ends of said release elements, a proximal end of each of said release elements being moved proximally of said jaw assembly in a first direction in response to closure of said jaw assembly to drive said stop members proximally to disengage said stop members from said effected members.

6. The clip applier of claim 5, wherein said jaw assembly includes two jawarms, each of said jawarms having said stop therein, proximal ends of two stops cooperating with the same release mechanism being connected by a hinge.

7. The clip applier of claim 6, wherein said release mechanism further comprises a first pin through which proximal ends of two release elements on a same side of said jaw assembly are pivotally connected, said proximal ends of said release elements operatively engaging said hinge portion via said first pin to drive said stop member to move proximally.

8. The clip applier of claim 1, wherein said jaw assembly includes two jawarms, said acted-upon member being a clip, said stop abutting at least a portion of said clip to retain said clip in said jawarms.

9. The clip applier of claim 1, wherein said jaw assembly includes two jawarms, said stop being disposed on said jawarms, said acted upon member being a clip, said clip including two arms, at least a portion of one of said arms being operatively positioned in one of said jawarms and at least a portion of the other of said arms being operatively positioned in the other of said jawarms, said stop abutting said at least a portion of said one of said arms; at least one side of the jaw assembly is provided with the release mechanism, the release mechanism comprising two release elements, the stop and proximal ends of the release elements corresponding thereto being operatively engaged, the proximal end of each release element being moved proximally in a first direction in response to closure of the jaw assembly to drive the stop to move proximally to disengage the stop from the at least a portion of the jawarms in which it is located, while distal ends of the two release elements are moved toward each other.

10. The clip applier of claim 9, wherein a distal end of one of said release elements is pivotally connected to one of said jawarms, a distal end of the other of said release elements is pivotally connected to the other of said jawarms, and proximal ends of both of said release elements are pivotally connected.

11. The clip applier of claim 9, wherein each said clip arm has an ear, said at least a portion of said clip arm including said ear.

12. The clip applier of claim 9, wherein each of said clip arms has a chute thereon; the stopper comprises a mounting part and a limiting part, wherein the mounting part is slidably positioned in the chute, a guide space is formed between the limiting part and the bottom of the clamp arm, and the limiting part is used for restraining the lug when the lug moves in the guide space.

13. The clip applier of claim 12, wherein a distal end of any one of said mounting portions extends from a chute in which said mounting portion is located when said jaw assembly is in an open condition.

14. The clip applier of claim 1, wherein said stop member is resilient.

15. The clip applier of claim 2, wherein each said stop is fixedly connected to a proximal end of a corresponding said release element.

16. The clip applier of claim 1, wherein said release mechanism is provided on both sides of said jaw assembly.