CN116407203A - Clip Applier - Google Patents

Abstract

The invention discloses a clip applier, which includes a clip bin, a jaw assembly, a clip feeding drive mechanism, a backstop mechanism and an actuator; the clip bin includes a clip; the clip feed drive mechanism includes a first drive member, a clip feed rod, and an actuator The first driving member can be driven to move so that the clip feeding rod pushes the clip into the jaw assembly. The anti-retraction mechanism includes a guide pivot member, and the guide pivot member has a first anti-retraction portion, a second anti-retraction portion and a third anti-retraction portion. The actuator has an open position, an intermediate position and a closed position, and when the actuator is in the intermediate position, the clip is in the ready position. Before the actuator moves from the open position to the closed position, the first backstop, the second backstop, and the third backstop can sequentially prevent the first driver from retreating, thereby avoiding the occurrence of clamping faults and avoiding the The clip in the jaw assembly recedes to cause the problem that blood vessels or tissues cannot be clamped, which ensures smooth clipping and improves the reliability and safety of the operation.

Description

Clip Applier

technical field

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

Background technique

During surgical procedures, clips are often used to clamp blood vessels or tissues to reduce bleeding. Closing blood vessels or tissues with clips is simple and can be performed quickly, therefore, the use of clips in surgical operations has increased dramatically. A clip applier is an instrument for applying these types of clips to blood vessels or tissue.

The traditional clip applicator can only be used once. After installing a clip outside the body, send the jaws of the clip applier into the body to perform clip application and repeatedly install a single clip, which is inconvenient to use. In recent years, continuous clip appliers that can continuously apply multiple clips have become a trend.

A plurality of clips are provided in the clip applier for continuous clip application, and these clips are sequentially applied to blood vessels or tissues during use. Specifically, the clip applicator for continuous clip application is provided with a clip feeding assembly capable of sequentially pushing multiple clips into the jaw assembly. The continuous clip applier in the prior art is prone to clip feeding failure when the clip is pushed into the jaw assembly. For example, when the previous clip is not completely sent into the jaw assembly, the clip feed assembly has been reset, and when the clip is pushed again, the clip feed assembly will push the next clip instead of continuing to push the previous clip that has not been fully entered into the jaw assembly , As a result, lead to clamp failure.

Based on the above, it is necessary to improve the clip applier in the prior art.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention aims to provide a clip applier, which solves the technical problem that the clip applier is prone to premature reset of the clip feed rod, resulting in clip feeding failure.

The present invention is realized through the following technical solutions:

A clip applier, comprising a clip bin, a jaw assembly, a clip feed drive mechanism, a backstop mechanism and an actuator; the clip bin includes a clip; the clip feed drive mechanism includes a first drive member and a clip feed rod, The actuating member drives the first driving member to move so that the clip feed lever pushes the clip from the clip bin into the jaw assembly; the backstop mechanism includes a guide pivot member, and the guide The pivoting member has a first backstop, a second backstop and a third backstop, and the second backstop is located between the first backstop and the third backstop;

The actuator has an open position, an intermediate position and a closed position, and when the actuator is in the intermediate position, the clip is in a ready position;

In response to the movement of the actuator from the open position to the intermediate position, the first stop portion and the second stop portion are sequentially located at the proximal end of the first driving member to prevent the the first driving member retreats;

In response to the movement of the actuator from the intermediate position to the closed position, the third backstop is located at the proximal end of the first driving member and maintains an abutment state with the first driving member to preventing the first driving member from retreating;

When the actuating member is in the closed position, the first driving member is separated from the third backstop portion.

Further, the first driving member has an initial position, a first position, a second position and a third position; when the actuator is in the open position, the first driving member is in the initial position, and the When the actuating member is in the middle position, the first driving member is in the third position;

When the first driving member moves from the initial position to the first position, the first backstop portion is located at the proximal end of the first driving member;

Before the first driving member moves from the first position to the second position, the first driving member is located between the first backstop portion and the second backstop portion;

When the first driving member moves from the first position to the second position, the second backstop portion is located at the proximal end of the first driving member;

Before the first driving member moves from the second position to the third position, the first driving member is located between the second backstop portion and the third backstop portion;

When the first driving member moves from the second position to the third position, the third backstop portion is located at the proximal end of the first driving member.

Furthermore, the jaw assembly defines a first longitudinal axis; the clip bin includes at least two clips, and at least two of the clips are stacked along a predetermined direction, the predetermined direction being aligned with the first longitudinal axis Angled, wherein the clip aligned with the jaw assembly along the first longitudinal axis is a first clip.

Furthermore, the first driving member drives the clamp feeding rod to push the first clip to move until it is completely out of the clip chamber, and the first driving member is located between the first backstop portion and the second backstop parts to prevent the first driver from retreating.

Furthermore, the second anti-retraction part is located on the far side of the first anti-retraction part, the proximal end of the first anti-retraction part has a first guide surface, and the distal end of the first anti-retraction part has a first guide surface. A backstop surface, the first driving member can move from the first guide surface to between the first backstop part and the second backstop part, the first backstop surface is between the first backstop part and the second backstop part A driving member abuts against the first driving member when retreating to prevent it from retreating.

Furthermore, the first driving member drives the clamp feeding rod to push the first clip to move completely out of the clip chamber and before reaching the ready position, and the first driving member is located at the second backstop portion and the third backstop portion to prevent the first driving member from retreating.

Furthermore, the third anti-retraction part is located on the far side of the second anti-retraction part, the proximal end of the second anti-retraction part has a second guide surface, and the distal end of the second anti-retraction part has a first Two anti-retraction surfaces, the first driving member can move from the second guide surface to between the second anti-retraction part and the third anti-retraction part, and the second anti-retraction surface is between the first anti-retraction part A driving member abuts against the first driving member when retreating to prevent it from retreating.

Furthermore, when the first driving member drives the clamp feeding rod to push the first clip to the ready position, the first driving member moves to the distal end of the third backstop and contacts with The distal end of the third backstop portion abuts to prevent the first driving member from retreating.

Furthermore, the proximal end of the third backstop portion has a third guide surface, and the distal end of the third backstop portion has a third backstop surface, and the first driving member can move from the third guide surface Moving to the distal end of the third backstopping part, the third backstopping surface can abut against the first driving part when the first driving part is backing up so as to prevent it from going back.

Further, the actuator has a guide channel, and the guide channel includes a starting point, a first stop point, a second stop point, a third stop point and an end point; the stop mechanism also includes a guide, The guide member is disposed on the guide pivot member, at least a part of the guide member is accommodated in the guide channel and can move in the guide channel, in response to the activation member from the open position Moving to the closed position, the guide moves from the starting point to the first backstop point, the second backstop point, the third backstop point and the end point sequentially.

Furthermore, in response to the movement of the guide member from the starting point to the first stop point, the first stop portion is located at the proximal end of the first driving member to prevent the first driving member from retreating ;

In response to the movement of the guide member from the first stop point to the second stop point, the second stop portion is located at the proximal end of the first driving member to prevent the first driving member from retreat;

In response to the movement of the guide member from the second stop point to the third stop point and before the end point from the third stop point, the first driving member and the first stop point The distal ends of the three backstops abut to prevent the first driving member from retreating.

Furthermore, in response to the movement of the guide member from the third stop point to the end point, the third stop part is separated from the first driving part.

Furthermore, the first driving member has an initial position, a first position, a second position and a third position;

When the guide part is at the starting point, the first driving part is at the initial position;

When the guide member is located at the first backstop point, the first driving member is located at the first position;

When the guide member is located at the second stop point, the first driving member is located at the second position;

When the guide member is located at the third stop point, the first driving member is located at the third position;

Before the guide member moves from the third stop point to the end point, the first driving member remains at the third position.

Furthermore, the clip applier includes a housing, and the anti-retraction mechanism also includes a bias spring; the guide pivot member also has a pivoting portion, a guiding portion, and a force receiving portion, and the pivoting portion is arranged on the between the guide part and the force-receiving part;

The pivot joint is pivotally connected to the housing so that the guide pivot member can rotate relative to the housing, the guide member is arranged on the guide part, and the bias spring is connected to the stressed partial abutment;

The movement of the actuator drives the guide to move around the pivot joint under the action of the bias spring, so that the first backstop, the second backstop and the third backstop The receding portion can be located at the proximal end of the first driving member in order to prevent the first driving member from retreating.

Further, when the actuator is at the middle position, the first driver is disengaged from the actuator, and the third backstop part abuts against the first driver to prevent the first Drive back.

Compared with the prior art, the beneficial effect of the present invention is that: the clip applier of the present invention sets the first backstop part and the second backstop part so that the clamp feeding rod will not retreat and reset before sending the clip to the ready position, It avoids the occurrence of clamp feeding failure. By setting the third backstop part, it avoids the problem that the clamp in the jaw assembly cannot clamp blood vessels or tissues due to the backward retreat, which ensures smooth clamping and improves the reliability and safety of the operation. sex.

Description of drawings

Fig. 1 is a schematic structural view of the first angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 2 is a schematic structural view of the second angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 3 is a schematic structural view of the third angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 4 is a schematic structural view of a partial region of the fourth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 5 is a schematic structural view of a partial region of the fifth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 6 is a schematic structural view of a partial area of the first angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a base provided by a specific embodiment of the present invention;

Fig. 8 is a schematic structural view of the first angle of the actuator provided by the specific embodiment of the present invention;

Fig. 9 is a schematic structural view of a partial region of the sixth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 10 is a schematic structural diagram of the seventh angle of the clip applier provided by the specific embodiment of the present invention, and Fig. 10 is a top view angle of Fig. 1;

Fig. 11 is a schematic structural view of a part of the eighth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 12 is a schematic structural view of a partial region of the ninth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 13 is a schematic structural view of a part of the tenth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 14 is a schematic structural view of the clip bin provided by the specific embodiment of the present invention;

Fig. 15 is a sectional view of the eleventh angle of the clip applier provided by the specific embodiment of the present invention, wherein the clip feed lever does not perform the clip feed action;

Fig. 16 is a cross-sectional view of the eleventh angle of the clip applier provided by the specific embodiment of the present invention, wherein the clip feeding rod sends the clip to the ready position;

17A-17B are structural schematic diagrams of guide pivots provided by specific embodiments of the present invention;

Fig. 18 is a structural schematic diagram of the first angle of the clip applier provided by the specific embodiment of the present invention, wherein the actuator is in the open position;

Fig. 19 is a schematic structural view of the first angle of the clip applier provided by the specific embodiment of the present invention, wherein the first driving member moves to the first position;

Fig. 20 is a schematic structural view of the first angle of the clip applier provided by the specific embodiment of the present invention, wherein the actuator is in the middle position;

Fig. 21 is a schematic structural view of the first angle of the clip applier provided by the specific embodiment of the present invention, wherein the actuator is in the closed position;

Fig. 22 is a schematic structural view of a partial area of the first angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 23 is a schematic diagram of a guiding channel provided by a specific embodiment of the present invention;

Fig. 24 is a schematic structural view of the second angle of the actuator provided by the specific embodiment of the present invention;

25A-B are schematic structural diagrams of the path switching member provided by the specific embodiment of the present invention;

Fig. 26 is a schematic structural view of the third angle of the actuator provided by the specific embodiment of the present invention;

Fig. 27 is a structural schematic diagram of the twelfth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 28A is a state diagram of the path switching member when the actuator is in the open position;

Fig. 28B is a state diagram of the path switching member before the actuator moves from the open position to the closed position;

Fig. 29A is a state diagram of the path switching member when the actuating member is in the closed position;

Fig. 29B is a state diagram of the path switching member before the actuator resets and reaches the open position;

Fig. 30 is a schematic structural view of the thirteenth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 31 is a schematic structural view of the fourteenth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 32 is a schematic structural view of the fifteenth angle of the clip applier provided by the specific embodiment of the present invention;

Fig. 33A is a schematic diagram of the cooperation between the operating element and the locking member, wherein the operating element is in a locked state;

Fig. 33B is a schematic diagram of the cooperation between the operating element and the locking member, wherein the operating element is in an unlocked state;

Fig. 34 is a structural schematic diagram of the first angle of the clip applier provided by the specific embodiment of the present invention, mainly for the purpose of showing the connector;

Fig. 35 is a schematic structural view of the sixteenth angle of the clip applier provided by the specific embodiment of the present invention,

Fig. 36 is a schematic structural view of the first angle of the clip applier provided by the specific embodiment of the present invention, mainly for the purpose of showing the cooperation between the connecting piece and the main shaft;

Fig. 37 is a schematic structural diagram of a connecting sleeve provided by a specific embodiment of the present invention;

Reference signs of the above drawings: 1-shaft assembly; 2-second longitudinal axis; 3-main shaft; 4-retaining ring; 5-first accommodation groove; 6-jaw assembly; 7-first longitudinal axis Long axis; 8-clamp; 9-first cavity; 10-second cavity; 11-inlet; 12-exit; 13-actuating member; 14-grip; 15-push claw; 16-pivot Turning end; 17-handle housing; 18-first head housing; 19-second head housing; 20-second limiting surface; 21-limiting plate; 22-first driving member; 23- Ring rib; 24-clamping rod; 25-outer tube; 26-sleeve; 27-closed tube; 29-seat body; 30-first rod body; 31-second rod body; 34-weight-reducing groove; 35-resistance part; 36-base; 37-first socket; 38-first card slot; 39-second socket; 40-second card slot; 41-first waist hole; 42-second waist hole; 43-first guide surface; 44-second guide surface; 45-guide column; 46-first clutch; 47-cylinder; 48-stop 50-the first spring; 51-the first push column; 52-the second push column; 53-the first pivot axis; 54-the second pivot axis; 55-the second spring; 56 -the third spring; 57-the fourth spring; 58-rotating member; 59-clip; 60-the third clip; 61-the second clip; 62-the first clip; 63-torsion spring; 65-second torsion arm; 66-push plate; 67-guide pivoting member; 68-first backstop; 69-first guide surface; 70-first backstop surface; 71-second backstop; 72-the third anti-retraction part; 73-pivot joint; 74-guiding part; 75-forced part; 76-first rotating arm; 77-second rotating arm; 78-third rotating arm; ; 80-bias spring; 81-guide; 82-guiding channel; 89-starting point; 90-first stop point; 91-second stop point; 92-third stop point; 93-end point; 94-path switch; 95-pivot; 96-first trigger part ; 97-the second trigger part; 98-execution part; 99-baffle plate; ; 106-first recess; 107-second recess; 108-operation element; 109-projection; -the first pincer arm; 116-the second pincer arm; 117-the sixth spring; 118-the first transmission part; 119-the first tooth part; 120-the second transmission part; 121-the second tooth part; Bit teeth; 123-first connecting rod; 124-second connecting rod; 125-connector; 126-first plane; 127-second plane; 128-connecting sleeve; Two stoppers; 131-Luer connector; 132-rotating member; 133-first connecting part; 134-second connecting part; 135-through hole; 136-first pin shaft; 137-second pin shaft; 138 - opening; 139 - third longitudinal axis.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating the handle assembly of the clip applier. The term "proximal" refers to the portion closer to the clinician and the term "distal" refers to the portion remote from the clinician. That is, the handle assembly is the proximal side, and the jaw assembly is the far side. For example, the proximal end of a component means the end relatively close to the handle assembly, and the distal end means the end relatively close to the jaw assembly. However, the clip applier can be used in many orientations and positions, so these terms expressing relative positional relationships are not limiting and absolute.

In the present invention, terms such as "connected" and "connected" should be interpreted in a broad sense unless otherwise clearly specified and limited, for example, they can be fixedly connected, detachably connected, or movably connected. , or integrated; it can be directly connected or indirectly connected through an intermediary, it can be the internal communication of two elements or the interaction relationship between two elements such as butting. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations. It should be noted that when there are qualifiers before "connected" and "connected", it has the meaning defined by the corresponding qualifiers, and only the situations that obviously need to be excluded are excluded, and other possible situations are not excluded, such as "detachably connected" Refers to the detachable connection, does not include integrated, but the movable connection is not excluded.

With reference to the placement direction and angle of the clip applier in FIG. 1 , the term “first direction” as used herein refers to the direction perpendicular to the paper in FIG. 1 . "Second direction" refers to the up-down direction (ie, the vertical direction). The "first direction" and the "second direction" are perpendicular to each other.

Referring to FIG. 1 , this embodiment provides a clip applier, specifically a clip applier for continuous clip application, for applying a clip 59 to a human body, such as a blood vessel or other tissues other than blood vessels.

The clip applier in this embodiment includes an operating assembly, a shaft assembly 1 extending from the operating assembly, a jaw assembly 6 , a transmission mechanism and a clip chamber 8 . The clip cartridge 8 has clips 59 . The jaw assembly 6 is disposed at the distal end of the shaft assembly 1 .

The operating assembly includes a housing and an actuator 13 movably installed on the housing. The housing is divided into a head housing and a handle housing 17 extending from the underside of the head housing according to the positional relationship. The handle housing The body 17 and the actuator 13 form a handle assembly, and the user can grasp the handle housing 17 with one hand, and pull the actuator 13 with fingers, so that the actuator 13 moves relative to the housing. Those skilled in the art will readily appreciate that although the actuator 13 is shown and described, the clip applier disclosed herein may not need to include the actuator 13, for example, the clip applier may be electric and may include a An actuation button that actuates the motor to control the firing of the device.

In this embodiment, part of the transmission mechanism is accommodated in the housing of the operating assembly, and part of the transmission mechanism is located in the shaft assembly 1 . In order to realize the clamp feeding action and jaw closing action (clamping action), the transmission mechanism includes a clamp feeding drive mechanism and a jaw drive mechanism. The clip feeding driving mechanism is used for performing the clip feeding action, and the jaw driving mechanism is used for performing the jaw closing action.

The transmission alternatively has a first state and a second state. In the first state, the clip feeding driving mechanism drives the clip 59 of the clip magazine 8 to move to the jaw assembly 6, so that the clip 59 is stably clamped in the jaw assembly 6 and waits for clipping. In the second state, the jaw driving mechanism drives the jaw assembly 6 to move, so that the jaw assembly 6 is closed, so that the clip 59 in the jaw assembly 6 clamps the tissue or blood vessel.

The actuator 13 is used to provide power to the transmission mechanism. Specifically, the transmission mechanism also includes a switching mechanism, which is used to selectively drive the clip feeding driving mechanism or the jaw driving mechanism. The actuating member 13 abuts against the switching mechanism to provide power to the switching mechanism, and the switching mechanism transmits the power to the clip feeding driving mechanism or the jaw driving mechanism alternatively. The actuator 13 can drive the switching mechanism to move to the distal end. When the transmission mechanism is in the first state, the switching mechanism moves to the far end to drive the clamp feeding drive mechanism to move to the far end. After the switching mechanism moves to the preset distance, the transmission mechanism switches from the first state to the second state. When the transmission mechanism is switched to the second state, the switching mechanism continues to move distally to drive the jaw driving mechanism to move distally.

The switching mechanism is operably connected with the jaw driving mechanism, and the jaw driving mechanism has a resisting portion 35, and by pushing the resisting portion 35, the jaw driving mechanism can be pushed to move to the distal end. in particular:

When the transmission mechanism is in the first state, the switching mechanism is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move; The mouth drive mechanism is not driven and is in a static state.

When the transmission mechanism is in the second state, the switching mechanism is separated from the clip feeding driving mechanism, and the clip feeding driving mechanism no longer advances; the switching mechanism is combined with the thrust portion 35 of the jaw driving mechanism to drive the jaw driving mechanism to move, so that the jaw drives The mechanism drives the jaw assembly 6 to move.

In this embodiment, the movement of the clip feeding driving mechanism and the jaw driving mechanism are independent and time-sharing, which can prevent some problems caused by the linkage of the two, such as complex structure and complex motion relationship.

In this embodiment, the doctor operates an actuating member 13, acts on the switching mechanism through the actuating member 13, and then selectively acts on two different driving mechanisms of the clip feeding driving mechanism and the jaw driving mechanism, so that two different The driving mechanism can complete corresponding actions according to a preset sequence. That is to say, the doctor can operate one actuator 13 to complete the two actions of the clip feeding action and the jaw closing action in one overall stroke, and these two actions meet the preset order, and there will be no mutual interference problem, which ensures the doctor's operation The operation is safe and smooth, and the operation is simple and user-friendly.

Referring to FIGS. 2 and 12 , the clip feeding driving mechanism includes a first driving member 22 and a clip feeding rod 24 connected to the first driving member 22 . The shaft assembly 1 includes a spindle 3 . The first driving member 22 is sheathed on the main shaft 3 and can move along the main shaft 3 . The main shaft 3 is provided with a first accommodating groove 5 , and the first accommodating groove 5 extends along the longitudinal direction of the main shaft 3 . The clamping rod 24 is located in the first accommodating groove 5 and moves in the first accommodating groove 5 . The proximal end of the clamping rod 24 is connected to the first driving member 22 , and the distal end of the clamping rod 24 can act on the clip 59 .

The first driving member 22 can drive the clip feeding rod 24 to move, thereby driving the clip 59 of the clip magazine 8 to enter the jaw assembly 6 . Specifically, in the first state, the switching mechanism is operatively connected to the first driving member 22 to perform the clamping action, and the switching mechanism drives the first driving member 22 to move distally, so that the clamping rod 24 moves distally to Push the clip 59 of the clip magazine 8 to the jaw assembly 6 . In the second state, the switching mechanism is separated from the first driving member 22 , and the first driving member 22 does not move forward. At this time, the clip 59 has been stably clamped in the jaw assembly 6 .

Referring to FIGS. 3-5 , the jaw driving mechanism includes an outer tube 25 and a second driving member, and the switching mechanism is operatively connected to the second driving member. The outer tube 25 is sheathed on the main shaft 3 of the shaft assembly 1, the distal end of the outer tube 25 is matched with the jaw assembly 6 (see the description below for details), the proximal end of the outer tube 25 is connected with the second driving member, and the second The driving member can drive the outer tube 25 to move to drive the jaw assembly 6 to move.

The resisting portion 35 is disposed on the second driving member. The switching mechanism drives the resisting portion 35 to move the second driving member to the distal end. In the first state, the switching mechanism is separated from the resisting portion 35, the switching mechanism does not drive the second driving member to move distally, and the second driving member is in a static state. In the second state, the switching mechanism abuts against the pushing portion 35 to perform jaw closing action, and the switching mechanism drives the second driving member to move distally, so that the outer tube 25 moves distally to close the jaw assembly 6 .

Referring to FIGS. 4-5 and 11 , the second driving member includes a seat body 29 , a first rod body 30 and a second rod body 31 . The seat body 29 is sheathed on the main shaft 3 , and the distal end of the seat body 29 is connected with the proximal end of the outer tube 25 . The seat body 29 has a first side and a second side, and the first side and the second side are disposed opposite to each other along the first direction. A first connecting portion 133 extends outward from the first side, and a second connecting portion 134 extends outward from the second side. The distal end of the first rod body 30 is connected to the first connecting portion 133 , and the distal end of the second rod body 31 is connected to the second connecting portion 134 . In this embodiment, two rod bodies are provided to make the movement of the second driving member more balanced and to improve the overall stability of the transmission mechanism. Of course, only one rod body can also be provided.

The structures of the two rod bodies are substantially the same, and one of the rod bodies is taken as an example to describe the structure of the rod body. A sliding groove 32 is arranged on the rod body, and the sliding groove 32 is a closed groove. The resisting portion 35 is disposed on the rod body, specifically, the resisting portion 35 is disposed at the distal end of the sliding groove 32 . Since the second driving member in this embodiment includes two rod bodies, the jaw driving mechanism has two resisting parts 35 . In order to reduce the weight of the rod body, each rod body is also provided with a weight reducing groove 34 , and the weight reducing groove 34 is located at the far side of the sliding groove 32 . The resisting portion 35 is disposed between the sliding groove 32 and the weight reducing groove 34 . The purpose of setting the weight-reducing groove 34 is to reduce the weight of the rod body, so that the overall weight of the clip applier is lighter and more convenient to use. The purpose of setting the sliding groove 32 is to guide the switching mechanism. The switching mechanism at least partially moves in the sliding groove 32 to make the movement of the switching mechanism more stable. The specific structure will be described in detail later.

The switching mechanism includes a base 36, a first clutch mechanism and a second clutch mechanism. In order to make the overall structure of the switching mechanism more compact, make full use of the space inside the clip applier, and also to make the movement of the switching mechanism more stable and smooth, part of the first clutch mechanism is accommodated in the base 36, and the second clutch mechanism is at least Partially housed in the base 36 . The actuating member 13 abuts against the base 36 to provide power to the switching mechanism so that the switching mechanism moves distally.

Referring to FIGS. 6-7 , when the transmission mechanism is in the first state, the base 36 is sleeved on the first driving member 22 . Specifically, the base 36 has a through hole 135, and the first driving member 22 is accommodated in the through hole 135, and the through hole 135 runs through the distal end surface and the proximal end surface of the base 36, so that the first driving member 22 can pass through the through hole. 135 through. When the transmission mechanism is in the second state, the first driving member 22 no longer advances, the base 36 still advances, and the base 36 is separated from the first driving member 22 .

The first clutch mechanism includes a first clutch member 46 and a clutch switching mechanism. The first clutch member 46 is connected with the clutch switching mechanism. The second clutch mechanism includes a second clutch member.

When the transmission mechanism is in the first state, the second clutch part is separated from the pushing part 35 of the second driving part, and the first clutch part 46 is connected with the first driving part 22, so that the switching mechanism can drive the first driving part 22 to move so that The clamping lever 24 moves to perform the clamping action.

When the transmission mechanism is in the second state, under the effect of the clutch switching mechanism, the first clutch member 46 is separated from the first driving member 22; the second clutch member abuts against the pushing portion 35 of the second driving member, so that the switching mechanism can The second driving member is driven to move, so as to drive the outer tube 25 to move, so as to execute the action of closing the jaws. The structure and principle of the switching mechanism will be described in more detail below with reference to the placement direction and angle of the clip applier in Figure 1:

4, 6, the base 36 has a first side and a second side opposite along a first direction. A first socket portion 37 is provided on a first side of the base 36 , and a second socket portion 39 is provided on a second side of the base 36 . The first sleeve part 37 is sleeved on the first rod body 30 and can move along the first rod body 30 , and the second sleeve part 39 is sleeved on the second rod body 31 and can move along the second rod body 31 . Thereby, an operative connection between the switching mechanism and the second driving member is realized. The first side part is also provided with a first waist-shaped hole 41 , and the second side part is also provided with a second waist-shaped hole 42 . The first waist-shaped hole 41 is disposed above the first sleeve portion 37 , and the second waist-shaped hole 42 is disposed above the second sleeve portion 39 . Each waist-shaped hole extends along the second direction.

Referring to FIGS. 2-3 and 5-6 , the clutch switching mechanism includes a guide column 45 . A guide rail is arranged inside the head housing, and the guide post 45 can move on the guide rail, and the guide post 45 is connected with the first clutch member 46 .

Specifically, the head shell of the clip applier includes a first head shell 18 and a second head shell 19 . The first head housing 18 and the second head housing 19 are arranged symmetrically along the axial direction of the main shaft 3 . The guide rail can be alternatively arranged on the inner wall of the first head shell 18 or the inner wall of the second head shell 19 . In order to make the movement of the guide post 45 on the guide rails more stable, the guide rails are symmetrically arranged on the inner walls of the first head housing 18 and the second head housing 19 . That is, the inner wall of the first head housing 18 is provided with guide rails, and the inner wall of the second head housing 19 is also provided with guide rails. The guide post 45 has a first end and a second end. The first end of the guide column 45 moves on the guide rail of the inner wall of the first head housing 18 , and the second end of the guide column 45 moves on the guide rail of the inner wall of the second head housing 19 .

The guide rail includes a first guide surface 43 and a second guide surface 44 . The second guide surface 44 is higher than the first guide surface 43 . The guide post 45 is movable on the first guide surface 43 and the second guide surface 44 . The first guide surface 43 is smoothly connected to the second guide surface 44 through an inclined surface, so that the movement of the guide column 45 is smoother.

The guide post 45 can move on the guide rail following the movement of the first clutch member 46 . When the guide column 45 moves on the first guide surface 43 , the first clutch member 46 and the first driving member 22 maintain a combined state. Since the second guide surface 44 is higher than the first guide surface 43, when the guide column 45 moves onto the second guide surface 44 of the guide rail, it drives the first clutch 46 to move upward, so that the first clutch 46 and the first driving member 22 separate. And when the first clutch part 46 is separated from the first driving part 22, the second clutch part abuts against the resisting part 35 of the jaw driving mechanism to push the jaw driving mechanism to move. The advantage of this arrangement is that, on the one hand, the structure of the clutch switching mechanism is simple, no additional devices are needed, and the internal space of the housing is fully utilized, resulting in a compact structure; on the other hand, the power consumption is low, and the operation is smooth and labor-saving.

The guide post 45 is accommodated in the base 36 , and the first end of the guide post 45 protrudes from the first waist-shaped hole 41 and is located on the guide rail on the inner wall of the first head housing 18 . The second end of the guide post 45 protrudes from the second waist hole 42 and is located on the guide rail on the inner wall of the second head housing 19 . Since each waist-shaped hole extends along the second direction, the guide column 45 can move along the second direction (ie, move up and down).

Referring to FIGS. 5-6 and 12 , the first driving member 22 is an annular component, and an annular rib 23 is provided on the outer peripheral surface of the first driving member 22 .

Referring to FIGS. 4-6 , the first clutch member 46 is received in the base 36 . The first clutch member 46 includes a cylinder 47 , a blocking block 48 and a locking block 49 . The upper end of the column 47 is connected with the guide column 45, so that the column 47 can drive the guide column 45 to move to the distal end or the proximal end, and the guide column 45 can drive the column 47 to move along the second direction. The blocking block 48 is disposed at the bottom of the cylinder 47 , the locking block 49 is disposed at the bottom of the blocking block 48 , and the projection of the blocking block 49 on a plane perpendicular to the second direction is located inside the projection of the blocking block 48 on the plane.

The bottom end of the clamping block 49 is detachably connected to the first driving member 22 . The bottom end surface of the clamping block 49 is an arc-shaped surface matching with the surface of the first driving member 22 , so that the connection between the clamping block 49 and the first driving member 22 is more stable. In the first state, the clamping block 49 is located at the proximal end of the annular rib 23 , the distal end surface of the clamping block 49 abuts against the proximal end surface of the annular rib 23 , and the clamping block 49 can push the annular rib 23 distally. , so that the first driving member 22 moves to the distal end. In the second state, the locking block 49 moves upward to separate from the annular rib 23 .

The proximal end surface of the clamping block 49 is an inclined surface, thus, when the first driving member 22 and the first clutch member 46 are reset (see later description for details), the proximal end surface of the clamping block 49 can be moved from the ring rib 23 The distal end passes through, so that the block 49 returns to the proximal end of the annular rib 23 .

The first clutch member 46 also includes a first spring 50 . The first spring 50 is sheathed on the column body 47 , the upper end of the first spring 50 abuts against the guide column 45 , and the lower end of the first spring 50 abuts against the upper end of the blocking block 48 . In the first state, the first spring 50 is in a compressed state, and the first spring 50 gives a downward force to the block 48, so that the bottom end of the block 49 abuts against the first driving member 22 more stably, improving the clamping speed. Action stability.

To sum up, when the transmission mechanism is in the first state, under the action of the actuating member 13, the base 36 moves to the distal end, the first clutch member 46 moves to the distal end, and the guide post 45 is driven by the first clutch member 46. Move to the distal end along the first guide surface 43, when the guide column 45 moves from the first guide surface 43 to the second guide surface 44, the guide column 45 drives the first clutch member 46 to move upwards, so that the first clutch member 46 and the second clutch member 46 move upward. A driving member 22 is separated, and the transmission mechanism switches to the second state.

Referring to FIGS. 4-5 , the second clutch includes two push columns, namely a first push column 51 and a second push column 52 . The first push post 51 is located in the sliding groove 32 of the first rod body 30 and can move in the sliding groove 32 of the first rod body 30 . The first push post 51 cooperates with the resisting portion 35 of the first rod body 30 . The second push post 52 is located in the sliding groove 32 of the second rod body 31 and can move in the sliding groove 32 of the second rod body 31 . The second push post 52 cooperates with the resisting portion 35 of the second rod body 31 . Since the sliding groove 32 is a closed groove, the push column will not break away from the sliding groove 32 .

The second clutch part can also only include a push column. In this embodiment, two push columns are provided to make the push of the switching mechanism to the rod body more balanced and stable. In this embodiment, the movement of the switching mechanism and the movement of the second driving member are more balanced by providing two rod bodies, two socket parts and two push columns, thereby improving the overall stability of the transmission mechanism.

When the transmission mechanism is in the first state, the first push pin 51 is separated from the resisting portion 35 of the first rod body 30 , and the second push rod 52 is separated from the resisting portion 35 of the second rod body 31 . Under the action of the actuator 13, the base 36 moves distally, and the first push column 51 moves distally in the sliding groove 32 of the first rod body 30 and gradually approaches the resisting portion 35 of the first rod body 30. The second push post 52 moves distally in the sliding groove 32 of the second rod body 31 and gradually approaches the resisting portion 35 of the second rod body 31 .

When the transmission mechanism is in the second state, the first push column 51 abuts against the thrust portion 35 of the first rod body 30, and the second push column 52 abuts against the push portion 35 of the second rod body 31, so that the second clutch member The second driving member is driven to move to the distal end, so that the outer tube 25 moves to the distal end to close the jaw assembly 6 .

As mentioned above, the actuating member 13 abuts against the base 36 to provide power to the switching mechanism to move the switching mechanism distally.

Referring to FIGS. 7-8 , the proximal end of the first sleeve portion 37 is provided with a first slot 38 , and the proximal end of the second sleeve portion 39 is provided with a second slot 40 . Correspondingly, the actuator 13 has a grip portion 14 and symmetrically arranged push claws 15 extending from the grip portion 14 to the inside of the head housing. It is arranged in the second card slot 40 . The grip part 14 is used for the user to hold it. Thus, the force applied by the actuator 13 to the base 36 is more uniform, the abutment between the actuator 13 and the base 36 is more stable, and the base 36 can move forward smoothly.

The inner wall of the first head housing 18 of the clip applicator is provided with a first limiting surface (not shown in the drawings), and the first limiting surface is matched with the bottom end surface of the first sleeve part 37, and the first set The bottom end of the connecting portion 37 is located on the first limiting surface, and the first limiting surface extends along the moving track of the first sleeve portion 37 . With reference to Fig. 9, the inner wall of the second head housing 19 of the clip applier is provided with a second limiting surface 20, the second limiting surface 20 is matched with the bottom end surface of the second socket part 39, and the second socket part The bottom end of 39 is located on the second limiting surface 20 , and the second limiting surface 20 extends along the moving track of the second sleeve part 39 . Thus, when the base 36 moves toward the distal end or the proximal end, the first socket portion 37 moves on the first limiting surface, and the second socket portion 39 moves on the second limiting surface 20, so that the base 36's movement is more stable and precise. The structures of the first limiting surface and the second limiting surface 20 are substantially the same.

Referring to FIGS. 1 and 10 , in this embodiment, the jaw assembly 6 is pivotally connected to the shaft assembly 1 so that the jaw assembly 6 can rotate around the first pivot axis 53 relative to the shaft assembly 1 . Specifically, the jaw assembly 6 defines a first longitudinal axis 7, the shaft assembly 1 defines a second longitudinal axis 2, and the jaw assembly 6 can rotate relative to the shaft assembly 1 around a first pivot axis 53, so that the first longitudinal axis The long axis 7 is parallel to or at an angle to the second longitudinal axis 2 , so that it is convenient for the doctor to adjust the position and angle of the jaw assembly 6 , so that it is convenient to use.

The clip applier in this embodiment also includes a transmission assembly, a steering rod assembly and an operating element 108 . The operating element 108 is drivably connected to a transmission assembly which is drivably connected to the steering rod assembly. In response to a force applied to the operating element 108 , the operating element 108 moves to drive the transmission assembly so that the steering rod assembly moves to drive the jaw assembly 6 relative to the shaft assembly 1 about the first pivot axis 53 .

Referring to FIG. 11 , the transmission assembly is operatively connected to the main shaft 3 . The transmission assembly includes a first transmission member 118 and a second transmission member 120 , the second transmission member 120 is sheathed on the main shaft 3 , and the first transmission member 118 and the second transmission member 120 are driveably connected. The transmission assembly is located at the proximal side of the seat body 29 , and the transmission assembly is located at the far side of the resisting portion 35 . That is, the transmission assembly is generally located between the seat body 29 and the resisting portion 35 . The purpose of setting the transmission assembly between the base 29 and the thrust part 35 is to make the overall layout of the instrument more compact and easier to operate. Specifically, the operating element 108 should be as close as possible to the handle assembly so that the operating element 108 can be controlled by the same handle assembly. hand manipulation. It makes the doctor's operation more convenient and can improve the efficiency of the operation.

In this embodiment, the operating element is close to the actuator 13. Taking FIG. 3 as an example, the operating element 108 is located on the upper left of the actuator 13 and close to the actuator 13. During the actual operation, the doctor holds the handle with his thumb The housing 17, the index finger operates the operating element 108, and the rest of the fingers can operate the actuator 13, so that the clip applier can be fully manipulated with only one hand. Since the transmission assembly is driven by the operating element 108 , the transmission assembly should be as close as possible to the operation element in order to achieve effective force transmission and compact structure, so the transmission assembly is preferably disposed between the seat body 29 and the resisting portion 35 . The specific structures of the transmission assembly, steering rod assembly and operating elements will be described in detail later.

And just because the transmission assembly is located between the seat body 29 and the pushing portion 35, the distance between the seat body 29 and the pushing portion 35 becomes larger, so the seat body 29 and the pushing portion 35 need to be connected by a rod, as As mentioned above, in order to reduce the weight of the rod body, it is necessary to set the weight-reducing groove 34 on the rod body, which effectively reduces the weight of the rod body, making the overall weight of the clip applier lighter and more convenient to use.

As mentioned above, the movement of the switching mechanism to the distal end along the main shaft 3 can make the second clutch member abut against the abutting portion 35 of the second driving member. When the second clutch abuts against the pushing portion 35 of the second driving member, the switching mechanism continues to move distally, so that the second driving member moves distally to close the jaw assembly 6 . When the jaw assembly 6 is closed, there is a preset distance between the switching mechanism and the transmission assembly along the direction of the second longitudinal axis 2 of the shaft assembly 1 . In other words, when the switching mechanism moves to the distal end, it will never contact the transmission assembly, the transmission assembly will not hinder the movement of the switching mechanism, and the movement of the switching mechanism and the transmission assembly will not interfere with each other.

Referring to FIGS. 4-5 , the clip applier further includes a first reset member capable of storing first energy when the switching mechanism moves to the distal end. The first energy is released, and the switching mechanism moves toward the proximal end to reset under the action of the first reset member. Specifically, the first reset member includes two second springs 55 . One of the second springs 55 is sheathed on the first rod body 30 , its proximal end abuts against the distal end of the first sleeve portion 37 , and its distal end abuts against the first connecting portion 133 of the seat body 29 . Another second spring 55 is sheathed on the second rod body 31 , its proximal end abuts against the distal end of the second sleeve portion 39 , and its distal end abuts against the second connecting portion 134 of the seat body 29 . During the movement of the switching mechanism to the distal end, the first socket part 37 gradually approaches the first connecting part 133, and at the same time the second socket part 39 gradually approaches the second connecting part 134, and the two second springs 55 can be compressed And store the first energy, release the first energy, and the switching mechanism can move to the proximal end to reset.

Referring to Figures 5 and 12, the proximal end of each sliding groove 32 is provided with a limit portion 33, and in the initial state (that is, when the switching mechanism does not move to the distal end), under the action of the first reset member, the push column slides with the position where it is located. The stop portion 33 of the groove 32 abuts against it. When the base 36 of the switching mechanism resets under the action of the first reset member, when the push column slides in the sliding groove 32 to the proximal end until it abuts against the limit portion 33, due to the limit of the limit portion 33, the push column It will stop at the limiting portion 33, so that the base 36 of the switching mechanism can be reset to this position.

Referring to FIGS. 4-5 , the clip applier also includes a second reset member. The second reset member can store the second energy during the process of the clip feeding driving mechanism moving to the distal end. The second energy is released, and the clamp feeding driving mechanism moves toward the proximal end to reset under the action of the second reset member. Specifically, the second return member includes a third spring 56 , and the third spring 56 is sheathed on the main shaft 3 . The proximal end of the third spring 56 abuts against the distal end surface of the annular rib 23 of the first driver 22 , the distal end of the third spring 56 abuts against the retaining ring 4 outside the main shaft 3 , and the retaining ring 4 abuts along the main shaft 3 Extending in the circumferential direction, the retaining ring 4 is arranged on the proximal side of the transmission assembly. When the switching mechanism drives the first driving member 22 to move to the distal end, the annular rib 23 of the first driving member 22 gradually approaches the retaining ring 4, so that the third spring 56 is compressed to store the second energy and release the second energy. , the first driving member 22 can move to the proximal end to reset, that is, the clip feeding driving mechanism can move to the proximal end to reset.

Referring to FIG. 12 , the clamping rod 24 is accommodated in the first accommodation groove 5 . In the initial state (that is, when the clamping rod 24 does not move to the distal end), the proximal end of the clamping rod 24 can abut against the proximal end surface of the first accommodation groove 5 under the action of the second reset member. When the first driving member 22 moves to the proximal end under the action of the second reset member, the clamping rod 24 moves to its proximal end and abuts against the proximal end surface of the first accommodating groove 5, so that the clamping rod 24 stops Continue to move proximally to return to this position. The first driving member 22 also stops moving to the proximal end under the action of the clamping rod 24 .

Referring to Figures 3 and 11, the clip applier also includes a third reset member. The third resetting part can store the third energy and release the third energy during the process of the jaw driving mechanism moving to the distal end, and the jaw driving mechanism moves toward the proximal end and resets under the action of the third resetting part. Specifically, the third return member includes a fourth spring 57 , and the fourth spring 57 is sleeved on the outer tube 25 . The proximal end of the fourth spring 57 abuts against the distal end surface of the base body 29 , and the distal end of the fourth spring 57 abuts against the inner wall of the head housing. During the process that the switching mechanism drives the second driving member to move to the distal end, the fourth spring 57 is compressed to store the third energy and release the third energy. end move reset.

Referring to FIG. 3 , the head housing of the applying forceps is provided with a limiting plate 21 , and the limiting plate 21 is symmetrically arranged on the inner walls of the first head housing 18 and the second head housing 19 . In the initial state (that is, when the jaw driving mechanism does not move to the distal end), under the action of the third reset member, the seat body 29 of the second driving member abuts against the limit plate 21 . When the second driving member moves to the proximal end under the action of the third reset member, the seat body 29 moves to abut against the limiting plate 21, and due to the limiting effect of the limiting plate 21, the second driving member can stop and continue. Move proximally so that the second driver can be reset to this position.

Referring to FIG. 13 , the clip applier in this embodiment further includes a rotating member 58 . The jaw assembly 6 is pivotally connected to the shaft assembly 1 through a rotating member 58 . The proximal end of the rotating member 58 is pivotally connected to the distal end of the main shaft 3 , so that the rotating member 58 can rotate relative to the shaft assembly 1 around the first pivot axis 53 , and the distal end of the rotating member 58 is connected to the jaw assembly 6 . Specifically, the jaw assembly 6 includes a first pliers arm 115 and a second pliers arm 116 pivotally connected to the distal end of the rotating member 58, the first pliers arm 115 and the second pliers arm 116 can move closer to each other, When the rotating member 58 rotates relative to the shaft assembly 1 around the first pivot axis 53, the jaw assembly 6 can rotate with the rotating member 58, that is, the jaw assembly 6 can rotate around the shaft assembly 1 under the drive of the rotating member 58. The first pivot axis 53 rotates.

The clip bin 8 is disposed on the rotating member 58 , and when the rotating member 58 rotates relative to the shaft assembly 1 around the first pivot axis 53 , the clip bin 8 can rotate along with the rotating member 58 . Referring to FIG. 14 , the clip cartridge 8 includes at least two clips 59 . The clip cartridge 8 has a clip cavity to accommodate clips 59 forming a stack within the clip cavity. The stacking direction of the clips 59 is at an angle to the first longitudinal axis 7 of the jaw assembly 6 , and in this embodiment, preferably, the stacking direction of the clips 59 is perpendicular to the first longitudinal axis 7 . In other embodiments, the stacking direction of the clips 59 forms an acute angle or an obtuse angle with the first longitudinal axis 7 .

The number of clips 59 of the clip chamber 8 is adjustable, and the number of clips 59 will not affect the normal use of the clip applier, and the number of clips 59 can be adjusted according to usage requirements during actual use. During the operation, a continuous clipping process generally applies three clips 59 to tissues or blood vessels, so the clip magazine 8 in this embodiment includes three clips 59 .

Referring to FIG. 14 , the clip cavity of the clip magazine 8 includes a first cavity 9 and a second cavity 10 . Taking the placement direction and angle of the clip applier in FIG. 14 as a reference, the first cavity 9 is disposed above the second cavity 10 , and the first cavity 9 communicates with the second cavity 10 . The proximal end of the second cavity 10 intersects the proximal end surface of the clip warehouse 8 to form an inlet 11 of the second cavity 10, and the distal end of the second cavity 10 intersects the distal end surface of the clip warehouse 8 to form a second cavity 10. The outlet 12 of the second cavity 10 .

The three clips 59 of the clip bin 8 are a clip 60 , a clip 61 and a clip 62 from top to bottom. The clip 60 and the clip 61 are arranged in the first cavity 9 , and the clip 62 is arranged in the second cavity 10 . Cartridge 8 also includes a biasing assembly capable of applying a generally downward force to the upper end surface of clip 60 . Specifically, the bias assembly includes a torsion spring 63 and a push plate 66 . The torsion spring 63 has a first torsion arm 64 and a second torsion arm 65 . If there is no external force, the two torsion arms of the torsion spring 63 will be in a naturally stretched state. In the naturally stretched state, the first torsion arm 64 and the second torsion arm 65 are generally arranged along the up-down direction in FIG. 14 . In this embodiment, the first torsion arm 64 of the torsion spring 63 is clamped on the clip 8, and the second torsion arm 65 of the torsion spring 63 rotates a certain angle relative to its natural stretch state and then acts on the clip 60, so that the clip can be 60 applied force. The second torsion arm 65 of the torsion spring 63 is connected to the push plate 66 . The torsion spring 63 applies force to the clip 60 through the push plate 66 , thereby increasing the force receiving area, so that the torsion spring 63 can act on the clip 60 more stably.

Referring to FIG. 15 , in the initial state (that is, before the clamping rod 24 performs the clamping action), the distal end of the clamping rod 24 extends into the second cavity 10 from the entrance 11 of the second cavity 10 . Therefore, when the clip bin 8 rotates relative to the shaft assembly 1 , under the action of the clip bin 8 , the clamp feeding rod 24 is also bent accordingly, so as to adapt to the rotation of the clip bin 8 . The clamping rod 24 is made of elastic material, including but not limited to metal, so that the clamping rod 24 is flexible and can be bent and deformed to adapt to the rotation of the clamping chamber 8 .

Referring to FIG. 16 , when the clip feed rod 24 moves to the far end (i.e. forward) to push the clip 62 to the jaw assembly 6 and before the clip feed rod 24 moves to reset, the clip feed rod 24 abuts against the bottom of the clip 61 , so that neither the clip 60 nor the clip 61 can move downward.

When the clip feeding rod 24 moves to the far end (ie forward) to push the clip 62 to the jaw assembly 6, and after the clip feeding rod 24 moves to reset, under the action of the biasing assembly, both the clip 60 and the clip 61 Moving downwards, the clip 61 enters into the second cavity 10 to continue clipping. The downward movement of the clip 60 and the clip 61 under the action of the bias assembly is based on the placement angle and direction of the clip applier in FIGS. 14-16 as a reference. When the placement direction and angle of the clip applier are changed, the clip 60 and the clip 61 can still move into the second cavity 10 under the action of the biasing assembly.

As mentioned above, when the transmission mechanism is in the first state, the switching mechanism is combined with the clip feeding driving mechanism, and the clip applier performs the clip feeding action. The user manipulates the actuating member 13 so that the first clutch member 46 pushes the first driving member 22 to move to the distal end, so that the clamping rod 24 moves to the distal end, and the clamping rod 24 moves from the clip 59 in the second cavity 10 The proximal end pushes against the clip 59 and pushes the clip 59 to the jaw assembly 6. At this time, the clip feeding is completed, and the position of the clip 59 is the ready position. The ready position is the position where the clip 59 is stably clamped by the jaw assembly 6 and can be effectively compressed to a closed state. If the clip 59 slides in the jaw assembly 6 so that it is not in the ready position, it will cause Insufficient support for the clip 59 causes the clip 59 to pop out automatically or twist the clip 59, resulting in poor compression effect.

When the user manipulates the actuator 13 so that the clamp bar 24 pushes the clip 62 into the jaw assembly 6, before the clamp bar 24 pushes the clip 62 into the ready position, if the user accidentally releases the actuator 13, the Under the action of a reset member, the switching mechanism retreats and resets, causing the clamping rod 24 to retreat and reset. Since the clip 62 has been pushed forward for a certain stroke, when the clip feed rod 24 retreats and resets, the clip 60 and the clip 61 will move down to the second cavity 10, and the user manipulates the actuator 13 again to drive the clip feed rod 24 to When the distal end moves, the clip feeding rod 24 simultaneously pushes the clip 61 and the clip 62, and the clip 61 interferes with the clip feeding to the clip 62, resulting in failure to send the clip normally. Therefore, in the present invention, before the clip feed rod 24 pushes the clip 62 into the ready position, the clip feed rod 24 remains on the near end of the clip 62 against the clip 62, and supports the clip 61 and the clip 60, even if the user accidentally releases the clip 62. The actuator 13 and the clamp feeding rod 24 will not retreat, and the clip 61 and the clip 60 will not enter the second cavity 10 in advance.

As mentioned above, when the transmission mechanism is in the second state, the switching mechanism is separated from the clamp feeding driving mechanism, the switching mechanism is combined with the resisting portion 35 of the jaw driving mechanism, and the clamp applier executes the jaw closing action. The user manipulates the actuator 13, and the second clutch pushes the second driving member to move distally, so that the outer tube 25 moves distally to close the jaw assembly 6, thereby closing the clip 59 in the jaw assembly 6, at this time For clipping completion time, the clip 59 in the ready position is applied to the tissue or blood vessel.

When the jaw assembly 6 is closed to close the clip 59, the process of clip 59 being forced to close will have a tendency to move proximally, resulting in poor clip application effect. Therefore, when the clip applier of the present invention is in the second state, the transmission mechanism , the clip feeding rod 24 remains on the proximal end of the clip 59 against the clip 59, so as to prevent the clip 59 from receding and cannot apply clips. In other words, when the transmission mechanism is in the second state, the switching mechanism is separated from the clip feeding driving mechanism, and the clip feeding driving mechanism will not move proximally, so that the clip feeding rod 24 can continue to abut the clip 59 at the proximal end of the clip 59 . When the jaw assembly 6 is fully closed, the clip 59 has been applied to the tissue or blood vessel at this time, and the clip feeding driving mechanism moves proximally and resets.

In order to achieve the above effects, the clip applier in this embodiment further includes a backstop mechanism. The anti-retraction mechanism is housed in the head shell.

As mentioned above, the actuator 13 is movably connected to the housing. Pulling the actuating member 13 makes the actuating member 13 move relative to the housing, and the actuating member 13 can move to three special positions: an open position, an intermediate position and a closed position. Specifically, referring to FIG. 18 , at the initial moment, the user does not operate the actuator 13, and the actuator 13 is in the open position. Referring to FIG. 20 , the user operates the actuating member 13. When the clip feeding is completed, the actuating member 13 is in the middle position. When the actuating member 13 is in the middle position, the clip 59 is in the ready position. Referring to FIG. 21 , the user operates the actuator 13 , and when the clip application is completed, the actuator 13 is in the closed position.

Specifically, before the actuator 13 moves from the open position to the middle position, the switching mechanism is combined with the clip feeding drive mechanism, and the clip applier performs the clip feeding action. "Before moving to the middle position" means that the actuator 13 has not yet moved to the middle position. When the actuator 13 is in the middle position, the switching mechanism is separated from the clamp feeding driving mechanism, and at the same time, the switching mechanism is combined with the resisting portion 35 of the jaw driving mechanism. The actuator 13 moves from the middle position to the closed position, and the clip applier executes the action of closing the jaws.

Referring to FIGS. 6 and 9 , the anti-retraction mechanism includes a guiding pivot 67 . Referring to FIGS. 17A-17B , the guiding pivot member 67 has a first backstopping portion 68 , a second backstopping portion 71 and a third backstopping portion 72 . The second backstop portion 71 is located between the first backstop portion 68 and the third backstop portion 72 . Specifically, the first anti-retraction part 68 is located near the second anti-retraction part 71 , and the third anti-retraction part 72 is located at the far side of the second anti-retraction part 71 .

As mentioned above, the clip feeding driving mechanism includes the first driving member 22 and the clip feeding rod 24 , and the actuator 13 can drive the first driving member 22 to move so that the clip feeding rod 24 pushes the clip 59 into the jaw assembly 6 .

In response to the movement of the actuating member 13 from the open position to the middle position, the first backstop portion 68 and the second backstop portion 71 are sequentially located at the proximal end of the first driving member 22 to prevent the first driving member 22 from retreating. Before the clip 59 enters the ready position, if the user accidentally releases the actuator 13, the first driver 22 will abut against the first backstop 68 or the second backstop 71, so that the first driver 22 will not retreat , The clip feeding rod 24 is always kept at the proximal end of the clip 59 against the clip 59, thereby avoiding clip feeding errors.

In response to the movement of the actuator 13 from the middle position to the closed position, the third stop portion 72 is located at the proximal end of the first driving member 22 and maintains an abutting state with the first driving member 22 to prevent the first driving member 22 from retreating. "Before moving to the closed position" means that the actuator 13 has not yet moved to the closed position. Before the jaw assembly 6 is closed, the first driving member 22 will not retreat, and the clip feeding rod 24 remains on the proximal end of the clip 59 against the clip 59 to prevent the clip 59 from retreating, thereby ensuring the stability of clip application.

When the actuating member 13 is in the closed position, the first driving member 22 is separated from the third backstop portion 72 . After the clip 59 has been applied to the tissue or blood vessel, the third stopper 72 is separated from the first driving member 22 , the first driving member 22 moves proximally to reset, and the clip feeding rod 24 moves proximally to reset.

Because the base 36 of the switching mechanism has a through hole 135, the first driving member 22 is accommodated in the through hole 135, and the through hole 135 runs through the distal end surface and the proximal end surface of the base 36, therefore, when the first driving member 22 When the proximal end moves, the first driving member 22 can pass through the through hole 135 and abut against one of the first backstopping portion 68 , the second backstopping portion 71 and the third backstopping portion 72 .

The first driving member 22 has an initial position, a first position, a second position and a third position. The initial position is the position where the user does not operate the actuating member 13 and the first driving member 22 does not move. The switching mechanism drives the first driving member 22 to move from the initial position to the distal end, pass through the first position, the second position and then reach the third position. When the actuating member 13 is in the open position, the first driving member 22 is in the initial position. When the actuating member 13 is at the middle position, the first driving member 22 is at the third position. Before the actuator 13 moves from the middle position to the closed position, the first driving member 22 remains at the third position.

Referring to FIG. 19 , when the first driving member 22 moves from the initial position to the first position, the first driving member 22 is located at the distal end of the first backstop portion 68 . Specifically, when the first driving member 22 moves from the initial position to the distal end to the first position, the first driving member 22 just reaches the distal end of the first backstop portion 68 . At this time, if the first driving member 22 moves toward the proximal end, the proximal end of the first driving member 22 will abut against the first backstop portion 68 and cannot continue to move backward.

It should be noted that moving proximally refers to moving toward the proximal end of the clip applier, and moving distally refers to moving toward the distal end of the clip applier, which is for convenience of description. Meanwhile, the near end and the far end in other contents are also the near end and the far end of the clip applier.

Before the first driving member 22 moves from the first position to the second position, the first driving member 22 is located between the first backstop portion 68 and the second backstop portion 71 . Specifically, during the process of the first driving member 22 moving distally from the first position to before the second position, the first driving member 22 moves distally between the first backstop portion 68 and the second backstop portion 71 . During this movement, if the first driving member 22 moves toward the proximal end, the proximal end of the first driving member 22 will abut against the first backstop portion 68 and cannot continue to move backward.

When the first driving member 22 moves from the first position to the second position, the first driving member 22 is located at the distal end of the second backstop portion 71 . Specifically, when the first driving member 22 is at the second position, the first driving member 22 just reaches the distal end of the second backstop portion 71 . At this time, if the first driving member 22 moves toward the proximal end, the proximal end of the first driving member 22 will abut against the second backstop portion 71 and cannot continue to move backward.

Before the first driving member 22 moves from the second position to the third position, the first driving member 22 is located between the second backstop portion 71 and the third backstop portion 72 . Specifically, in the process before the first driving member 22 moves from the second position to the third position, the first driving member 22 moves distally between the second stop portion 71 and the third stop portion 72 . During this movement, if the first driving member 22 moves toward the proximal end, the proximal end of the first driving member 22 will abut against the second backstop portion 71 and cannot continue to move backward.

Referring to FIG. 20 , when the first driving member 22 moves from the second position to the third position, the first driving member 22 is located at the distal end of the third backstop portion 72 . Specifically, when the first driving member 22 is in the third position, the first driving member 22 just moves to the distal end of the third backstop portion 72, and the third backstop portion 72 abuts against the proximal end of the first driving member 22, At this time, if the first driving member 22 moves toward the proximal end, the proximal end of the first driving member 22 will abut against the third backstop portion 72 and cannot continue to move backward.

When the first driving member 22 is in the third position, the actuating member 13 is in the middle position, and the actuating member 13 is continuously manipulated so that the third backstop portion 72 is always in contact with the first stop before the actuating member 13 moves from the middle position to the closed position. The proximal end of the driving member 22 abuts to prevent the first driving member 22 from retreating.

Referring to FIG. 21 , when the actuating member 13 moves from the intermediate position to the closed position, the third backstop portion 72 is disengaged from the first driving member 22 .

As noted above, the jaw assembly 6 defines a first elongate axis 7 . Referring to FIG. 15 , the clip 59 aligned with the jaw assembly 6 along the first longitudinal axis 7 is the first clip, ie, the clip 62 is the first clip. The clip 62 is located within the second cavity 10 of the cartridge 8 . The first driving member 22 moves to the distal end to drive the clip feeding rod 24 to push the clip 62 to move. When the first driving member 22 moves to the second position, the clip 62 moves out of the clip chamber 8 . When the first driving member 22 moves to the third position, the clip 62 enters the ready position.

Referring to FIG. 19 , the first driving member 22 drives the clamp feeding rod 24 to push the clip 62 to move out of the clip chamber 8 completely. The first driving member 22 is located between the first backstop portion 68 and the second backstop portion 71 to prevent the A driver 22 moves backward. The clamp bar 24 drives the clip 62 to move out of the clip chamber 8 completely. At this time, the far end of the clip 61 abuts against the upper surface of the clip 62 , and the proximal end of the clip 61 abuts against the top of the clip bar 24 . If the clamping rod 24 retreats and resets at this time, under the action of the bias assembly, the proximal end of the clip 61 will drop into the second cavity 10, and when the clamping rod 24 moves forward again, the clamping rod 24 will The far end will push against the clip 61 and cannot continue to push against the clip 62. Due to the interference of the clip 61, the clip feeding rod 24 cannot send the clip 62 to the ready position, thus a clip feeding failure occurs. However, in this embodiment, the clamping rod 24 will not retreat before the clip 62 moves out of the clamping chamber 8 completely, so that the clamping failure will not occur.

The first driving member 22 drives the clamp feeding rod 24 to push the clip 62 to move out of the clip chamber 8 completely and before reaching the ready position. The first driving member 22 is located between the second backstop portion 71 and the third backstop portion 72 to prevent The first driving member 22 retreats. When the clip bar 24 drives the clip 62 to move completely out of the clip bin 8 and before reaching the ready position, at this time, the clip 61 abuts against the upper part of the clip bar 24. If the clip bar 24 retreats and resets at this time, the bias Under the action of the assembly, the clip 61 completely falls into the second cavity 10. When the clip feed rod 24 moves forward again, the far end of the clip feed rod 24 will push against the clip 61 and cannot continue to push against the clip 62. A clip feed failure has occurred. However, in this embodiment, the clamp feeding rod 24 will not retreat before the clip 62 moves to the ready position, so that the clamp feeding failure will not occur.

Referring to FIG. 20 , when the first driving member 22 drives the clamp feed rod 24 to push the clamp 62 to the ready position, the first driving member 22 moves to the far end of the third backstop portion 72 and is connected to the far end of the third backstop portion 72 . end abutting to prevent the first driving member 22 from retreating. When the clamp rod 24 drives the clip 62 to move to the ready position, if the clamp rod 24 retreats and resets. During the closing process of the jaw assembly 6, the clip 62 will retreat under force, resulting in failure to apply clips. In this embodiment, the clamp feeding rod 24 will not retreat before and during the closing of the jaw assembly 6, but will abut against the clip 62 to prevent it from retreating, thereby ensuring normal clamping.

In this embodiment, the first backstop 68 and the second backstop 71 are set so that the clamp feed rod 24 will not retreat and reset before the clip is sent to the ready position, thereby avoiding the occurrence of clip feed failures. By setting the third stop The receding part 72 avoids the problem that the clip 62 in the jaw assembly 6 cannot clamp blood vessels or tissues due to receding, ensures smooth clipping, and improves the reliability and safety of the operation.

Referring to FIG. 17 , the proximal end of the first stop portion 68 has a first guide surface 69 , the distal end of the first stop portion 68 has a first stop surface 70 , and the first driving member 22 can move from the first guide surface 69 Between the first anti-retraction portion 68 and the second anti-retraction portion 71 , the first anti-retraction surface 70 can abut against the first driving member 22 when the first driving member 22 retreats to prevent it from retreating.

The third anti-retraction portion 72 is located on the far side of the second anti-retraction portion 71, the proximal end of the second anti-retraction portion 71 has a second guide surface, and the distal end of the second anti-retraction portion 71 has a second anti-retraction surface. The driving member 22 can move from the second guide surface to between the second stop portion 71 and the third stop portion 72, and the second stop surface can abut against the first drive member 22 when the first drive member 22 retreats so that prevent it from retreating.

The proximal end of the third backstop portion 72 has a third guide surface, and the distal end of the third backstop portion 72 has a third backstop surface, and the first driving member 22 can move from the third guide surface to the third backstop portion 72 At the far end, the third anti-retraction surface can abut against the first driving member 22 when the first driving member 22 retreats to prevent it from retreating.

Specifically, referring to FIG. 17, the first guide surface 69 is an arc surface, and the first guide surface 69 forms an obtuse angle with the moving direction of the first driving member 22, so that the first driving member 22 can move along the first guide surface 69. And enter the far end of the first retreat stop portion 68 . The first backstop surface 70 forms an acute or right angle with the moving direction of the first driving member 22, so that the first driver 22 cannot move along the first backstop surface 70 to the proximal end of the first backstop portion 68, but can The first anti-retraction surface 70 abuts against each other.

The structures of the first guide surface 69, the second guide surface and the third guide surface are substantially the same, and the cooperation with the first driving member 22 is also substantially the same. The cooperation mode of piece 22 is no longer described in detail. The structures of the first anti-retraction surface 70, the second anti-retraction surface and the third anti-retraction surface are approximately the same, and the cooperation with the first driving member 22 is also approximately the same. And the way of cooperating with the first driving member 22 will not be described in detail.

When the first driver 22 moves to the first guide surface 69 of the first backstop 68, the first driver 22 exerts a force on the first backstop 68, under the action of the bias spring 80 (see below for details) Next, the guide pivoting member 67 moves down a certain distance, and at this time, the guide member 81 also moves down a certain distance in the guide passage 82, so that the first stop portion 68 moves down so that the first driving member 22 can pass through the first stop. Withdrawing part 68, when the first driving member 22 passes through the first backstopping part 68 and moves to the far end of the first backstopping part 68, under the action of bias spring 80, the guide pivoting part 67 moves up, so that the first backstopping part 68 moves upwards. A stop portion 68 moves up again to the movement track of the first driving member 22 , so that the first stop portion 68 can abut against the first drive member 22 . The first backstop portion 68 , the second backstop portion 71 , the third backstop portion 72 cooperate with the first driving member 22 in substantially the same manner, and will not be repeated here.

Referring to FIGS. 17A-17B and 22 , the guiding and pivoting member 67 of this embodiment also has a pivoting portion 73 , a guiding portion 74 and a force receiving portion 75 . The pivot portion 73 is disposed between the guide portion 74 and the force receiving portion 75 . The pivoting portion 73 is pivotally connected to the housing through the first pin shaft 136 , so that the guiding pivot member 67 can rotate around the first pin shaft 136 relative to the housing. The first backstop portion 68 , the second backstop portion 71 and the third backstop portion 72 are all disposed above the pivotal portion 73 . It should be noted that since the guide pivot 67 can rotate around the first pin shaft 136 relative to the housing, "the guide pivot 67 moves down" and "the guide 81 moves down" means that the guide pivot 67 Rotate counterclockwise, so that the part of the guide pivot member 67, which is located on the far side of the pivot joint 73, including each backstop portion, moves downward relatively, and the guide member 81 also moves downward relatively. Alternatively, the guide pivot member 67 may be configured to have a structure that moves up and down as a whole with the rotation of the actuator 13 .

The backstop mechanism also includes a bias spring 80 . One end of the bias spring 80 abuts against the receiving portion 75 and the other end abuts against the housing. The bias spring 80 is in a compressed state to apply a force to the force-receiving portion 75 , so that the guide pivot member 67 has a tendency to rotate clockwise around the first pin 136 of the pivot portion 73 .

Specifically, referring to FIGS. 17A-17B , the guiding pivot member 67 includes a first pivoting arm 76 extending proximally from the pivoting portion 73 , and a second pivoting arm 77 extending distally from the pivoting portion 73 . The end of the first rotating arm 76 is the force receiving portion 75 , and the end of the second rotating arm 77 is the guiding portion 74 . The first pivoting arm 76 and the second pivoting arm 77 take the first pin shaft 136 of the pivot joint 73 as a fulcrum to form a lever, and the bias spring 80 and the guide portion 74 are located at both ends of the lever. When the bias spring 80 is in a compressed state, The bias spring 80 applies a thrust to the force receiving portion 75, so that the guide pivot member 67 has a tendency to rotate clockwise, that is, the first backstop portion 68, the second backstop portion 71, the third backstop portion 72 and the guide Section 74 also has a tendency to rotate clockwise.

17 A-17B again, the guide pivot member 67 also includes a third arm 78 extending obliquely upward from the pivot portion 73, the third arm 78 forms an obtuse angle with the first arm 76, and the third arm 78 forms an obtuse angle with the first arm 76. The end of the arm 78 is a first backstop portion 68 , a second backstop portion 71 extends distally from the first backstop portion 68 , and a third backstop portion 72 extends distally from the second backstop portion 71 . A reinforcing rib 79 is provided between the first rotating arm 76 and the third rotating arm 78 , so that the structure of the guiding pivot member 67 is firmer and more stable.

With reference to Fig. 8,18-21, actuator 13 comprises actuator main body, the user-operated grip portion 14 that is arranged on one end of actuator main body, and the push claw 15 that is arranged on the other end of actuator main body, push claw 15 abuts and pushes the base 36 of the switching mechanism, so that the clamping driving mechanism or the jaw driving mechanism moves. The main body of the actuator is provided with a pivot end 16 which is pivotally connected with the housing, and the actuator 13 can rotate around the pivot end 16 . The actuator 13 also has a guide channel 82 . A guide channel 82 is located in the actuator body, between the pivot end 16 and the push dog 15 . Therefore, the guide passage 82 is disposed on the actuator 13 , and no additional structure is needed to arrange the guide passage 82 , so that the overall structure is compact.

Referring to FIGS. 18-21 , the anti-retraction mechanism in this embodiment further includes a guide piece 81 , and the guide piece 81 is arranged on the guide portion 74 of the guide pivot piece 67 . At least part of the guide piece 81 is accommodated in the guide channel 82 . When the actuating member 13 rotates around its pivot end 16 , the guiding channel 82 rotates accordingly, driving the guiding member 81 to move around the first pivot pin 136 under the action of the biasing spring 80 .

Referring to FIG. 23 , the guide channel 82 includes a starting point 89 , a first stop point 90 , a second stop point 91 , a third stop point 92 and an end point 93 . When the user operates the actuator 13 to move from the open position to the closed position, the actuator 13 moves, and the guide passage 82 and the guide 81 move relative to each other, and the guide 81 can guide along with the movement of the actuator 13. In the channel 82 , it moves from the starting point 89 to the first stop point 90 , the second stop point 91 , the third stop point 92 and the end point 93 . The guide passage 82 is a closed passage, and the closed passage is a passage surrounded on all sides. The movement of the guide member 81 in the guide passage 82 is restricted and cannot leave the guide passage 82, so that the guide member 81 cannot be separated from the guide passage 82 in this embodiment. Moving part 13.

The distance from the starting point 89 to the pivot end 16 of the actuator 13 and the distance from the end point 93 to the pivot end 16 of the actuator 13 are both smaller than the distance from the first backstop point 90 to the pivot end 16 of the actuator 13, and also smaller than the distance from the first stop point 90 to the pivot end 16 of the actuator 13. The distance from the second stop point 91 to the pivot end 16 of the actuator 13 is also smaller than the distance from the third stop point 92 to the pivot end 16 of the actuator 13 . That is, the positions of the first stop point 90 , the second stop point 91 and the third stop point 92 are higher than the start point 89 and the end point 93 . When the actuating member 13 is pulled, the actuating member 13 moves and drives the guide member 81 to rotate clockwise from the starting point 89 under the action of the bias spring 80 to lift up to the first stop point 90, and the actuating member 13 continues to move so that The guide member 81 moves from the first stop point 90 to the second stop point 91 , the third stop point 92 , and then moves downward to the end point 93 . When the guide piece 81 moves to the first backstop point 90 , the guide pivot piece 67 turns upwards, so that the first backstop portion 68 , the second backstop portion 71 and the third backstop portion 72 all move upward.

Referring to FIG. 18 , when the guide member 81 is located at the starting point 89 , the first driving member 22 is located at the initial position. When the guide member 81 is located at the first stop point 90, the first driving member 22 is located at the first position. When the guide member 81 is located at the second stop point 91 , the first driving member 22 is located at the second position. When the guide member 81 is located at the third stop point 92, the first driving member 22 is located at the third position. Before the guide member 81 moves from the third stop point 92 to the end point 93 , the first driving member 22 remains at the third position.

Referring to FIG. 19 , in response to the movement of the guide member 81 from the starting point 89 to the first backstop point 90, the guide pivot member 67 has rotated upwards, and the first driving member 22 just moves to the far end of the first backstop portion 68, that is, The first stop portion 68 is located at the proximal end of the first driving member 22 to prevent the first driving member 22 from retreating. At this time, if the actuating member 13 is released, the first driving member 22 will retreat for a short distance and then abut against the first backstop portion 68 to stop further retreating, thereby preventing the first driving member 22 from retreating.

When the guide member 81 moves from the first stop point 90 to before the second stop point 91 , the first driving member 22 moves distally between the first stop portion 68 and the second stop portion 71 . During this process, the actuating member 13 is released, and the first driving member 22 will retreat for a short distance and abut against the first backstop portion 68 to stop further retreating.

When the guide member 81 moves to the second backstop point 91, the first driver 22 is located at the second position, and the first driver 22 just moves to the distal end of the second backstop portion 71, that is, the second backstop part 71 Located at the proximal end of the first driving member 22 to prevent the first driving member 22 from retreating. If the actuating member 13 is released at this time, the first driving member 22 will retreat for a short distance and abut against the second backstop portion 71 to stop and continue to retreat.

When the guide member 81 moves from the second stop point 91 to before the third stop point 92 , the first driving member 22 moves distally between the second stop portion 71 and the third stop portion 72 . During this process, if the actuating member 13 is released, the first driving member 22 will retreat for a short distance and then abut against the second stop portion 71 to stop moving backward.

Referring to FIG. 20 , when the guide member 81 moves to the third stop point 92, the first drive member 22 is at the third position, and the first drive member 22 just moves to the far end of the third backstop portion 72, and the first drive member 22 It abuts against the distal end of the third stop portion 72 to prevent the first driving member 22 from retreating. When the guide member 81 moves to the third stop point 92, the actuating member 13 is at the middle position, and the clip 59 is at the ready position.

When the guide member 81 moves from the third stop point 92 to the end point 93, the first driver 22 is always at the third position, and the third stopper 72 abuts against the proximal end of the first driver 22 to prevent the first The driver 22 moves backward.

During the process of the guide member 81 moving from the third stop point 92 to the end point 93, the guide pivot member 67 does not move downward, so that the third stop part 72 can keep abutting against the proximal end of the first driving member 22, so that The clip feeding rod 24 can abut against the clip 59 at the proximal end of the clip 59, and the clip 59 will not retreat during the clip application, thereby ensuring the stability of the clip application.

Referring to FIG. 21 , in response to the movement of the guide member 81 from the third stop point 92 to the end point 93 , the third stop portion 72 is separated from the first driving member 22 . Specifically, when the guide member 81 reaches the end point 93, it is the moment when the clip application is completed. The guide pivot member 67 moves down, the third backstop 72 moves to the bottom of the first drive member 22, and the first drive member 22 resets. At this time, move in the closed position.

Referring to FIG. 23 , the guide passage 82 includes a main passage 83 and only one slave passage 84 extending from an opening portion 138 of the main passage 83 between both ends of the main passage 83 . The secondary passage 84 extends away from the pivot end 16 from the opening 138 of the main passage 83 , that is, the distance between the secondary passage 84 and the pivot end 16 is greater than the distance between the main passage 83 and the pivot end 16 . The two ends of the main passage 83 are respectively provided with a starting point 89 and an ending point 93 . The first backstop point 90 , the second backstop point 91 and the third backstop point 92 are all located in the secondary channel 84 . The bias spring 80 exerts a force on the guide pivot member 67 so that the guide member 81 can disengage from the main passage 83 and enter the slave passage 84 .

When the guide piece 81 moves from the starting point 89 of the main channel 83 into the secondary channel 84 , the guide piece 81 moves up to the first backstop point 90 , and the guide pivot member 67 turns upward. When the guide piece 81 moves in the secondary channel 84 , the guide piece 81 passes through the second stop point 91 and the third stop point 92 sequentially. Before the guide piece 81 moves from the third backstop point 92 to the end point 93 , the guide piece 81 is still moving from the channel 84 , and the third backstop portion 72 is always in contact with the first driving piece 22 . When the guide piece 81 moves from the third backstop point 92 of the channel 84 to the end point 93, the guide piece 81 moves down, so that the guide pivot piece 67 moves down, and the third backstop part 72 moves to the bottom of the first driving piece 22 , the first driving member 22 resets.

From the perspective of the guide 81, the working process of the clamp applier in this embodiment to perform the clamp feeding action and jaw closing action will be introduced in detail:

The operator presses the actuator 13 so that the guide 81 can move from the starting point 89 to the first stop point 90 , the second stop point 91 , the third stop point 92 and the end point 93 in sequence.

18-19, the guide piece 81 moves from the starting point 89 to the first backstop point 90, the guide piece 81 enters the slave passageway 84 from the main channel 83, the guide pivot piece 67 rotates upward, the first backstop part 68, the second backstop The two anti-retraction parts 71 and the third anti-retraction part 72 both move upwards, and the first driving member 22 moves to the distal end of the first anti-retraction part 68 .

During the process of the guide piece 81 moving from the first backstop point 90 to the second backstop point 91, the guide piece 81 moves in the secondary channel 84, and the first driving member 22 moves from the distal end of the first backstop portion 68 to the second backstop point 91. The distal end of the retreat portion 71.

During the process of the guide piece 81 moving from the starting point 89 to the second stop point 91, the guide column 45 has been moving on the first guide surface 43, the first clutch piece 46 is detachably connected to the first drive piece 22, and the switching mechanism drives The first driving member 22 moves.

During the process of the guide piece 81 moving from the second backstop point 91 to the third backstop point 92 , the guide piece 81 is moving in the secondary channel 84 , and the first driver 22 is at the second backstop portion 71 and the third backstop portion 72 Move to the far end. The guide column 45 first continues to move on the first guide surface 43. When the guide column 45 moves to the slope between the first guide surface 43 and the second guide surface 44, the guide member 81 will reach the third stop point 92 and Before reaching the third backstop point 92, and when the guide column 45 is on the slope, the first clutch member 46 is still detachably connected to the first driving member 22, and the switching mechanism drives the clip feeding driving mechanism to move.

Referring to FIG. 20, when the guide member 81 reaches the third backstop point 92, the guide member 81 is still moving from the channel 84, and the first driving member 22 just reaches the far end of the third backstop portion 72, and the third backstop portion 72 and The proximal end of the first driving member 22 abuts against each other. At this time, the guide post 45 has just reached the second guide surface 44, the first clutch 46 is separated from the first driver 22, the second clutch is in contact with the thrust portion 35 of the jaw driving mechanism, and the switching mechanism can drive the jaws to drive. Agency moves. When the guide member 81 reaches the third stop point 92, the actuating member 13 is in the middle position. At this moment, the clip feeding is completed, and the clip feeding drive mechanism has sent the clip 59 to the ready position.

In the process before the guide piece 81 moves from the third backstop point 92 to the end point 93, the guide piece 81 moves in the secondary channel 84, so that the guide pivot piece 67 does not move down, so that the third backstop portion 72 and the first drive piece 22 The proximal ends remain in abutment. The guide column 45 moves on the second guide surface 44 , the second clutch abuts against the pushing portion 35 of the jaw driving mechanism, and the switching mechanism drives the jaw driving mechanism to move.

Referring to FIG. 21 , when the guide member 81 reaches the end point 93, the guide member 81 enters the main channel 83, the guide pivot member 67 moves down, the third backstop 72 is separated from the first drive member 22, and the first drive member 22 is in the second position. Reset under the action of the reset piece. At this time, the guide post 45 is located on the second guide surface 44 , and the second clutch member abuts against the pushing portion 35 of the jaw driving mechanism. When the guide member 81 reaches the end point 93, the actuating member 13 is in the closed position. At this time, the clip application is completed, and the clip 59 at the ready position is applied to the tissue or blood vessel. When the actuating member 13 is released, the jaw drive mechanism is reset under the action of the third reset member, the switching mechanism is reset under the action of the first resetting member, and the actuating member 13 is reset under the drive of the switching mechanism.

Referring to FIG. 19, in this embodiment, when the guide member 81 moves from the starting point 89 to the first stop point 90 in the guide channel 82, the first driving member 22 has pushed the clip 59, and the position of the clip 59 has changed. , if the guide member 81 retreats from the first stop point 90 to the starting point 89, the first stop part 68 will move down and cannot prevent the first drive member 22 from retreating. If the first drive member 22 retreats, the next execution During the clip feeding action, clip feeding interference and clip feeding errors will occur.

Therefore, in this embodiment, when the guide piece 81 moves from the starting point 89 to the first backstop point 90 in the guide passage 82, the guide piece 81 can be locked by the guide passage 82, and the guide piece 81 cannot move from the first backstop point 90. Point 90 rolls back to starting point 89. Specifically, referring to FIG. 23 , the slave channel 84 includes a blocking wall 86 . The main channel 83 includes a first wall 85 extending from a starting point 89 to connect with a blocking wall 86 , the first wall 85 and the blocking wall 86 form a right angle or an acute angle. Such a simple angle design of the guide channel 82 can ensure that the blocking wall 86 can effectively prevent the guide member 81 from retreating from the first stop point 90 to the starting point 89 .

In order to enable the guide member 81 to move from the third stop point 92 to the end point 93 , the slave channel 84 further includes a guide wall 88 . The main channel 83 also includes a second wall 87 extending from an end point 93 to connect with the guide wall 88 , the second wall 87 forms an obtuse angle with the guide wall 88 . Such a simple angle design of the guide channel ensures that the guide member 81 can move from the third stop point 92 to the end point 93 .

In this embodiment, the actuating member 13 has forward movement and reset movement. Specifically, from the initial moment, the user keeps operating the actuator 13, and the actuator 13 moves from the open position to the middle position and then to the closed position. The movement of the actuator 13 towards the closed position is defined as the forward movement of the actuator 13 . Correspondingly, the movement of the actuating member 13 towards the open position is defined as the reset movement of the actuating member 13 .

When the actuating member 13 moves forward, the moving path of the guiding member 81 in the guiding channel 82 is the first path. When the actuating member 13 performs a reset movement, the moving path of the guiding member 81 in the guiding channel 82 is the second path. The first path of motion includes the master channel 83 and the slave channel 84 , and the second path of motion includes the master channel 83 and does not include the slave channel 84 .

When the actuator 13 reaches the closed position, the user releases the actuator 13, then under the action of the first reset member, the switching mechanism moves to the proximal end to reset, and the actuator 13 resets under the action of the switching mechanism. , without any stop, the second movement path shields the secondary channel 84, avoiding that the guide 81 enters the secondary channel 84 from the end point 93 during the reset movement and cannot retreat from the first stop point 90 to the starting point 89, ensuring that the actuator 13 and the smooth reset of the stop mechanism.

In order to realize the above-mentioned shielding from the channel 84, the clamp applier in this embodiment further includes a path switching element 94, a positioning mechanism and a path driving element.

The path switching member 94 has an open state and a closed state. When the path switch 94 is in an open state, the path switch 94 moves away from the secondary channel 84 to allow the guide 81 to enter or exit the secondary channel 84 . When the path switch 94 is in the closed state, the path switch 94 shields the secondary channel 84 to prevent the guide 81 from entering the secondary channel 84 .

Referring to FIG. 24 , the path switching member 94 is connected to the actuator 13 . The path switch 94 is disposed between the actuator 13 and the first head housing 18 . As mentioned above, the main body of the actuator is provided with a pivot end 16 which is pivotally connected with the housing, and the actuator 13 can rotate around the pivot end 16 . The gripping portion 14 of the actuator 13 is disposed on one side of the pivot end 16 , and the path switching member 94 is disposed on the opposite side of the pivot end 16 .

Referring to FIGS. 24-26 , the path switching member 94 includes a pivoting portion 95 , a first triggering portion 96 , a second triggering portion 97 and an actuating portion 98 . The pivoting portion 95 of the path switching member 94 is connected to the main body of the actuator through the second pin shaft 137 . The path switching member 94 can rotate relative to the actuating member 13 around the second pin shaft 137 . The first triggering part 96 is arranged on one side of the pivoting part 95, the second triggering part 97 is arranged on the opposite side of the pivoting part 95, the execution part 98 is arranged on the first triggering part 96, and the execution part 98 and the guide channel The slave channel 84 of 82 is provided correspondingly, and the executing part 98 is used to shield the slave channel 84. Preferably, the first trigger part 96 and the second trigger part 97 form an obtuse angle, and the obtuse angle faces the first head shell. In other embodiments, an acute angle or a right angle may be formed between the first triggering portion 96 and the second triggering portion 97 .

25 B-26, the actuator 98 has a baffle 99 extending toward the opening 138 of the main passage 83, and when the actuator 98 is inclined toward the actuator 13, the baffle 99 can close the opening 138 of the main passage 83 To close the secondary passage 84, so that the guide 81 cannot enter the secondary passage 84 from the opening 138, at this time the guide 81 can only move to the starting point 89 of the main passage 83 along the baffle plate 99 at the end point 93 of the main passage 83.

When the path switching member 94 rotates relative to the actuating member 13 around the second pin shaft 137 at the pivoting portion 95 , the first triggering portion 96 rotates toward the inner wall of the first head housing 18 or toward the actuating member 13 , When the first trigger part 96 turns toward the inner wall of the first head housing 18, the second trigger part 97 turns toward the actuator 13, and when the first trigger part 96 turns toward the actuator 13, the second trigger part 97 turns toward the The inner wall of the first head housing 18 rotates.

The positioning mechanism includes a convex portion 105 , a first concave portion 106 and a second concave portion 107 . Referring to FIG. 25B , the convex portion 105 is provided on the pivot portion 95 of the path switching member 94 . When the path switching member 94 rotates around the second pin shaft 137 , the protrusion 105 rotates synchronously with it. Referring to FIGS. 18-21 , both the first recess 106 and the second recess 107 are provided on the main body of the actuator. The protrusion 105 has elasticity, so that the protrusion 105 can move from the first recess 106 to the second recess 107 , and can also move from the second recess 107 to the first recess 106 .

When the convex part 105 is located in the second concave part 107, the second trigger part 97 is inclined toward the direction of the actuator 13, and the first trigger part 96 is inclined toward the direction of the inner wall of the first head housing 18, and is arranged on the first trigger part 96. The actuator part 98 is also inclined towards the direction of the inner wall of the first head housing 18, so that the actuator part 98 is out of the way from the channel 84, and the path switching member 94 is in an open state at this moment.

When the convex portion 105 is located in the first concave portion 106, the second triggering portion 97 is inclined toward the inner wall of the first head housing 18, and the first triggering portion 96 is inclined toward the direction of the actuator 13, and is arranged on the first triggering portion 96. The actuator part 98 is also inclined towards the direction of the actuator 13, so that the actuator part 98 closes the secondary channel 84, and the path switching part 94 is in a closed state at this time.

When there is no external force, the convex portion 105 is operatively accommodated in the second concave portion 107 or the first concave portion 106, and the convex portion 105 can be limited by the second concave portion 107 or the first concave portion 106, so that the path switching member 94 cannot Rotate around the second pin shaft 137, so that the path switching member 94 is always kept in an open state or a closed state.

During the movement of the actuating member 13, the path switching member 94 and the path driving member move relative to each other. The path driving member can drive the path switching member 94 to switch between the open state and the closed state. Specifically, the path driving member drives the path switching member 94 to rotate relative to the actuating member 13 around the second pin shaft 137 , so that the convex portion 105 moves between the second concave portion 107 and the first concave portion 106 . When the convex portion 105 of the path switching member 94 is operatively accommodated in the second concave portion 107, the path switching member 94 needs to be rotated by a first angle around the second pin shaft 137 in the first preset direction to move the convex portion 105 into the first recess 106 . When the convex portion 105 of the path switching member 94 is operatively accommodated in the first concave portion 106, the path switching member 94 needs to be rotated by a second angle around the second pin shaft 137 in a second preset direction to move the convex portion 105 into the second recess 107. The first preset direction and the second preset direction are mutually opposite directions, for example, when the first preset direction is clockwise, the second preset direction is counterclockwise.

Referring to FIG. 27 , the path driving member includes a first guiding rib 101 and a second guiding rib 103 , both of which are disposed on the inner wall of the first head housing 18 . The first guide rib 101 has a first guide slope 102 , and the second guide rib 103 has a second guide slope 104 .

Initially, the user does not operate the actuating member 13 , and the actuating member 13 is in the open position. At this time, the path switching member 94 is located at the second guiding rib 103 and disengaged from the first guiding rib 101 . In response to the movement of the actuating member 13 from the open position to the closed position, the actuating member 13 can drive the path switching member 94 to move from the second guiding rib 103 to the first guiding rib 101 . When the actuator 13 is in the closed position, the path switch 94 is located at the first guide rib 101 , and the path switch 94 is disengaged from the second guide rib 103 . In response to the movement of the actuator 13 from the closed position to the open position, the actuator 13 can drive the path switching member 94 to move from the first guide rib 101 to the second guide rib 103 . in particular:

Referring to FIG. 28A, at the initial moment, when the actuator 13 is in the open position, the first trigger part 96 is separated from the first guide rib 101, the second trigger part 97 is located between the second guide rib 103 and the actuator 13, and the second The trigger part 97 does not abut against the second guide rib 103, the convex part 105 is operatively accommodated in the second concave part 107, the second trigger part 97 is inclined towards the direction of the actuator 13, and the first trigger part 96 is towards the first head The direction of the inner wall of the first head housing 18 is inclined, the execution part 98 is inclined toward the direction of the inner wall of the first head housing 18, the execution part 98 is out of the way from the channel 84, and the path switching member 94 is in an open state.

Referring to FIG. 28B , the process before the actuator 13 moves from the open position to the closed position, the actuator 13 drives the path switching member 94 to move from the second guide rib 103 to the first guide rib 101 , when the first trigger part 96 Move to the first guide slope 102 of the first guide rib 101, the first trigger part 96 continues to move along the first guide slope 102, and the first guide slope 102 exerts force on the first trigger part 96, so that the path switching member 94 starts Rotate along the first predetermined direction around the second pin shaft 137. Since the angle of rotation is not sufficient, that is, the first angle is not rotated, the convex part 105 is still operatively accommodated in the second concave part 107, and the second concave part 107 is opposed to the convex part. The portion 105 is limited, and the path switching member 94 is always kept in an open state. Before the actuating member 13 moves forward from the open position to the closed position, the guide member 81 can move in the secondary channel 84 .

Referring to FIG. 29A, when the actuator 13 reaches the closed position, the first trigger part 96 of the path switch 94 moves along the first guide slope 102 to between the first guide rib 101 and the actuator 13, and the path switch 94 rotates The second pin shaft 137 rotates a first angle along the first predetermined direction, the convex portion 105 moves from the second concave portion 107 into the first concave portion 106 , and the path switching member 94 switches to a closed state.

Referring to FIG. 29B , the actuator 13 moves from the closed position to the open position before reaching the open position. Driven by the actuator 13 , the path switching member 94 moves from the first guide rib 101 to the second guide rib 103 . When the second trigger part 97 moves to the second guide slope 104 of the second guide rib 103, the second trigger part 97 continues to move along the second guide slope 104, and the second guide slope 104 is opposite to the second trigger part 97. A force is applied so that the path switching member 94 starts to rotate around the second pin shaft 137 in a second predetermined direction. Since the angle is not rotated enough, that is, the second angle is not rotated, the convex portion 105 is still operatively accommodated in the first concave portion 106, the first concave portion 106 limits the convex portion 105, and the path switching member 94 is always kept in a closed state. During the reset movement of the actuating member 13 from the closed position to the open position and before reaching the open position, the guide member 81 cannot move in the secondary channel 84 .

Referring to FIG. 28A , when the actuator 13 resets from the closed position to the open position and reaches the open position, the second trigger portion 97 of the path switching member 94 moves along the second guide slope 104 to the second guide rib 103 and the actuator 13 In between, the path switching member 94 rotates a second angle around the second pin shaft 137 along the second preset direction, the convex part 105 moves from the first concave part 106 to the second concave part 107, and the path switching part 94 switches to the open state .

As mentioned above, the clip applier of this embodiment also includes a transmission assembly, a steering rod assembly and an operating element 108 . Referring to FIG. 30 , the jaw assembly 6 is pivotally connected to the main shaft 3 of the shaft assembly 1 through a rotating member 58. In response to the force applied to the operating element 108, the operating element 108 moves to drive the transmission assembly, so that the steering rod assembly moves to The jaw assembly 6 is driven to rotate relative to the shaft assembly 1 around the first pivot axis 53 .

Specifically, the operating element 108 is connected with the transmission assembly through the connection assembly. Referring to FIG. 31 , the connecting assembly includes a driving rod 112 and a shaft body 113 . The drive rod 112 defines a third elongated axis 139 . The driving rod 112 is connected to the transmission assembly, and the third longitudinal axis 139 of the driving rod 112 is at an angle to the second longitudinal axis 2 of the shaft assembly 1 . In this embodiment, the third longitudinal axis 139 and the second longitudinal axis 2 are preferred. vertical. The shaft body 113 is connected to the driving rod 112, and the installation direction of the shaft body 113 is parallel to or at an angle to the direction of the second longitudinal axis 2 of the shaft assembly 1. In this embodiment, the installation direction of the shaft body 113 is preferably the same as that of the shaft assembly 1. The direction of the second longitudinal axis 2 is parallel. Referring to FIGS. 33A-33B , the operating element 108 is sleeved on the shaft body 113 and can slide along the shaft body 113 . The operating element 108 is rotatable around the third longitudinal axis 139 of the drive rod 112 and drives the drive rod 112 to rotate.

Referring to FIG. 31 , the transmission assembly includes a first transmission member 118 and a second transmission member 120 . The first transmission member 118 has a first tooth portion 119, the first tooth portion 119 includes a plurality of first teeth, and the plurality of first teeth are arranged along the circumference, so that the central axis of the first tooth portion 119 is perpendicular to the shaft assembly 1 Second longitudinal axis 2. The second transmission member 120 is sleeved on the main shaft 3, and the second transmission member 120 has a second tooth portion 121. The second tooth portion 121 includes a plurality of second teeth, and the plurality of second teeth are roughly along the second longitudinal direction of the shaft assembly 1. The long axis is arranged in 2 directions. The second tooth portion 121 is disposed on one side of the second transmission member 120 . A plurality of second teeth are arranged in a row. The first tooth portion 119 of the first transmission member 118 is engaged with the second tooth portion 121 of the second transmission member 120 .

The first transmission member 118 is connected with the driving rod 112 in the connection assembly. Manipulating the operating element 108 makes the driving rod 112 rotate to drive the first transmission member 118 to rotate, and the first tooth portion 119 is engaged with the second tooth portion 121 for transmission, so that the second transmission member 120 generates a distal or proximal displacement.

Referring again to FIG. 31 , the second tooth portion 121 has opposite first and second ends along the second longitudinal axis 2 of the shaft assembly 1, the first end has a limiting tooth 122, and the second end also has a limiting tooth 122. That is, the plurality of second teeth of the second tooth portion 121 are located between the two limiting teeth 122 . The width of the limit tooth 122 is greater than that of the second tooth, and the limit tooth 122 does not match the first tooth portion 119 of the first transmission member 118. Therefore, the first transmission member 118 cannot mesh with the limit tooth 122, so that the first transmission Part 118 can only move between the stop teeth 122 at the two ends of the second transmission part 120, thus, when the first transmission part 118 moves to the stop teeth 122 at the first end of the second tooth part 121, the first transmission part 118 can no longer continue to exercise. When the first transmission member 118 moves to the limit tooth 122 at the second end of the second tooth portion 121 , the first transmission member 118 cannot continue to move.

It should be noted that, for the movement of the transmission assembly, it is equivalent to the movement of the first transmission member 118 along the second tooth portion 121 of the second transmission member 120 , but in actual movement, the first transmission member 118 is on the second gear of the shaft assembly 1 . There is no displacement in the direction of the two longitudinal axes 2, and the second transmission member 120 has a displacement to the distal end or the proximal end in the direction of the second longitudinal axis 2 of the shaft assembly 1, so as to drive the steering rod assembly to move, Thus, the jaw assembly 6 is driven to rotate relative to the shaft assembly 1 around the first pivot axis 53 .

Referring to FIG. 32 , the steering rod assembly includes a first link 123 and a second link 124 . The main shaft 3 is provided with a second accommodating groove, and the second connecting rod 124 is arranged in the second accommodating groove and can move in the second accommodating groove. A proximal end of the second connecting rod 124 is connected to the second transmission member 120 . The distal end of the second link 124 is pivotally connected to the proximal end of the first link 123 . The distal end of the first link 123 is pivotally connected to the proximal end of the rotating member 58 . Therefore, when the second transmission member 120 is displaced to the distal end or the proximal end, it can drive the second connecting rod 124 to move distally or proximally, so that the first connecting rod 123 moves in the first rotational direction relative to the second connecting rod 124 Or the second rotation direction, so that the first link 123 drives the jaw assembly 6 to rotate relative to the shaft assembly 1 around the first pivot axis 53 in the first rotation direction or the second rotation direction.

In this embodiment, the operating element 108 has a locked state and an unlocked state. In the locked state, the operating element 108 makes and can only make a first movement to switch it to the unlocked state. "Doing and only being able to perform the first movement" means that the operating element 108 can only perform the first movement and cannot perform the second movement, so that the jaw assembly 6 cannot rotate around the first pivot axis 53 relative to the shaft assembly 1 . In the unlocked state, the operating element 108 can make a second movement to drive the first transmission member 118 to move, so that the jaw assembly 6 can rotate relative to the shaft assembly 1 around the first pivot axis 53 . In the unlocked state, the operating element 108 can perform a third movement to switch it to the locked state.

In order to realize the locking of the operating element 108, the clamp applicator of this embodiment further includes a locking piece 110, which is arranged on the head housing. Referring to FIG. 33B , the operating element 108 has a projection 109 located between the locking member 110 and the drive rod 112 .

33A-33B, the locking member 110 has a plurality of recesses 111, and each recess 111 is adapted to the protrusion 109 of the operating element 108, and each recess 111 can accommodate the protrusion 109, and the protrusion 109 can It is selectively accommodated in one of the recesses 111 . In the locked state, the projection 109 of the operating element 108 is operatively retained in one of the recesses 111 of the locking member 110 . In the unlocked state, the cam 109 of the operating element 108 disengages from the recess 111 in which it is located. Since the operating element 108 can slide along the shaft body 113 , the protrusion 109 of the operating element 108 can move between the driving rod 112 and the locking member 110 , so that the operating element 108 can be switched between the locked state and the unlocked state. The operating element 108 slides on the shaft body 113 along the direction toward the driving rod 112 as the first movement, the rotation of the operating element 108 around the third longitudinal axis 139 of the driving rod 112 is the second movement, and the operating element 108 moves along the direction away from the driving rod. Sliding on the shaft 113 in the direction of 112 is the third movement.

Referring to FIGS. 33A-33B , the clip applier includes a fifth spring 114 . The fifth spring 114 is sleeved on the shaft body 113, and the fifth spring 114 is arranged between the operating element 108 and the driving rod 112. When the operating element 108 slides on the shaft body 113 in the direction toward the driving rod 112 (the first movement) , the fifth spring 114 is compressed to store reset energy, and releases the reset energy so that the operating element 108 can perform a third movement.

In the locked state, in response to the force applied to the operating element 108, the operating element 108 makes a first movement, so that the protrusion 109 of the operating element 108 breaks away from the recess 111 where it is located, so that the operating element 108 is switched from the locked state to the unlocked state .

In the unlocked state, in response to a force applied to the operating element 108 , the operating element 108 makes a second movement such that the jaw assembly 6 rotates relative to the shaft assembly 1 about the first pivot axis 53 .

In the unlocked state, in response to the force applied to the operating element 108, the operating element 108 makes a third movement, so that the protrusion 109 of the operating element 108 is operatively accommodated in one of the recesses 111 of the locking member 110, thereby operating Element 108 switches from an unlocked state to a locked state.

Referring to FIGS. 33A-33B , the locking member 110 is an arc-shaped member, and a plurality of recesses 111 are disposed inside the arc-shaped member, and each recess 111 extends along the radial direction of the arc-shaped member. The plurality of recessed parts 111 are arranged substantially along the circumference and the plurality of recessed parts 111 are arranged along the movement track of the second movement of the operating element 108 . Thus, when the operating element 108 rotates a preset angle, the operating element 108 can perform a third movement at the preset angle, so that the protrusion 109 of the operating element 108 is accommodated in the depression corresponding to the preset angle In the portion 111, the operating element 108 is switched to the locked state while maintaining the preset angle, so that the jaw assembly 6 can be stably maintained at a certain rotation angle.

The arrangement of the plurality of recessed portions 111 of the locking member 110 enables the jaw assembly 6 to rotate at different angles and to be stably maintained at the angle of rotation. Specifically, the operating element 108 can drive the jaw assembly 6 to rotate around the first pivot axis 53 relative to the shaft assembly 1 along the first rotation direction, and can also drive the jaw assembly 6 to rotate around the first pivot axis 53 relative to the shaft assembly 1 along the second rotation direction. A pivot axis 53 rotates. The rotation of the jaw assembly 6 along the first rotation direction includes a state of turning to the bottom, and at this time the jaw assembly 6 is in the first rotation position. The rotation of the jaw assembly 6 along the second rotation direction also includes a state of turning to the bottom, and at this time the jaw assembly 6 is in the second rotation position.

As mentioned above, manipulating the operating element 108 makes the driving rod 112 rotate to drive the first transmission member 118 to rotate, and the first tooth portion 119 is engaged with the second tooth portion 121 for transmission, so that the second transmission member 120 generates a distal or proximal direction. displacement. When the first transmission member 118 moves to the limit tooth 122 at the first end of the second tooth portion 121 , the first transmission member 118 cannot continue to move, and the jaw assembly 6 is at the first rotation position. When the first transmission member 118 moves to the limit tooth 122 at the second end of the second tooth portion 121 , the first transmission member 118 cannot continue to move, and the jaw assembly 6 is at the second rotation position.

The operating element 108 can drive the jaw assembly 6 to rotate to the first rotation position, and can also drive the jaw assembly 6 to rotate to the second rotation position, and can drive the jaw assembly 6 to rotate between the first rotation position and the second rotation position . Since the plurality of recessed portions 111 of the locking member 110 are arranged along the second movement track of the operation element 108, the operation element 108 can perform a third movement after being rotated by a preset angle to be selectively accommodated in accordance with the preset angle. Set a concave portion 111 corresponding to the angle, so that the operating element 108 is switched to the locked state, so that the jaw assembly 6 is stably maintained at the first rotation position or the second rotation position or between the first rotation position and the second rotation position a location in between. In other words, the jaw assembly 6 can rotate at multiple angles relative to the shaft assembly 1 and can be stably maintained at the rotation angle, thereby making the use of the clip applier more flexible. Both the first rotation position and the second rotation position take the shaft assembly 1 as a reference, and are the positions of the jaw assembly 6 relative to the shaft assembly 1 .

Referring to FIGS. 34-35 , in this embodiment, the outer tube 25 includes a sleeve 26 and a closing tube 27 , the sleeve 26 is sleeved on the main shaft 3 , and the closing tube 27 is sleeved on the clip chamber 8 and the rotating member 58 . The proximal end of the sleeve 26 is connected to the seat body 29 of the second driver, the distal end of the sleeve 26 is pivotally connected to the proximal end of the closing tube 27 , and the distal end of the closing tube 27 is matched with the jaw assembly 6 . The sleeve 26 can move proximally or distally, so that the closure tube 27 moves proximally or distally, thereby opening or closing the jaw assembly 6 . Specifically, the jaw assembly 6 includes a first tong arm 115 and a second tong arm 116 , referring to FIG. 32 , a sixth spring 117 is disposed between the first tong arm 115 and the second tong arm 116 . When the closing tube 27 moves to the far end (i.e. forward), the jaw assembly 6 is accommodated in the closing tube 27 from the far end of the closing tube 27, and the sixth spring 117 is compressed to store energy, and the jaw assembly 6 closure. When the closing tube 27 moves proximally (ie backward), the jaw assembly 6 protrudes from the distal end of the closing tube 27 , and the sixth spring 117 releases energy to make the jaw assembly 6 open.

The sleeve 26 is pivotally connected to the closing tube 27, and since the closing tube 27 is sleeved on the rotating member 58, when the rotating member 58 rotates, in response to the force applied by the rotating member 58 to the closing tube 27, the closing tube 27 is relatively sleeved. The tube 26 rotates about the second pivot axis 54 .

The jaw assembly 6 includes a fully opened state and a fully closed state. Referring to the placement angle and direction of the clip applier in Figure 34, when the jaw assembly 6 is fully opened, the distance between the distal ends of the first tong arm 115 and the second tong arm 116 in the vertical direction is the largest, and the jaw assembly 6 In the fully closed state, the distance between the distal ends of the first pliers arm 115 and the second pliers arm 116 in the vertical direction is the smallest. The complete closing of the jaw assembly 6 makes the clip 59 between the first pliers arm 115 and the second pliers arm 116 change from an open state to a fully closed state for clamping on tissues or blood vessels. When the jaw assembly 6 is fully opened and fully closed, the first pivot axis 53 coincides with the second pivot axis 54 .

Referring to FIG. 1 , the clip applier also includes a rotating member 132 . The rotating member 132 is sleeved on the sleeve 26 and fixedly connected with the sleeve 26 . Thus, the sleeve 26 can be driven to rotate around the second longitudinal axis 2 of the shaft assembly 1 by rotating the rotating member 132 . When the sleeve 26 moves forward or backward, the rotating member 132 also moves forward or backward with the sleeve 26 .

Referring to FIGS. 34-35 , in this embodiment, the sleeve 26 and the closing tube 27 are pivotally connected through two connecting pieces 125 , so that when the sleeve 26 is driven by the rotating member 132 around the second longitudinal axis of the shaft assembly 1 When rotating, the sleeve 26 can drive the closing tube 27 to rotate. That is, by turning the rotating member 132, the sleeve 26, the two connecting members 125 and the closing tube 27 are all rotated.

Specifically, referring to FIG. 36 , each connecting piece 125 has a first plane 126 adapted to the main shaft 3 , and the distal end of the main shaft 3 has a second plane 127 adapted to the first plane 126 . Thus, when the rotating member 132 rotates to drive the sleeve 26 to rotate to rotate each connecting member 125 , each first plane 126 forms a fit with its corresponding second plane 127 , so that the main shaft 3 rotates following the connecting member 125 . That is, when the rotating member 132 rotates to rotate each connecting member 125, the connecting member 125 can generate a force on the main shaft 3 to drive the main shaft 3 to rotate around the second longitudinal axis 2 of the shaft assembly 1, thus, the main shaft 3 Drive the rotating member 58 to rotate, so that the closing tube 27 and the jaw assembly 6 rotate, so that it is convenient for the doctor to adjust the jaw assembly 6 to a suitable angle to clamp blood vessels or tissues. Rotation of the jaw assembly 6 relative to the shaft assembly 1 about the first pivot axis 53 enables the first longitudinal axis 7 of the jaw assembly 6 to be parallel or at an angle to the second longitudinal axis 2 of the shaft assembly 1 . When the first longitudinal axis 7 of the jaw assembly 6 is parallel to or at an angle to the second longitudinal axis 2 of the shaft assembly 1, the sleeve 26 can be rotated by rotating the rotating member 132, and the connecting member 125 can be rotated to drive The main shaft 3 rotates, so that the closed pipe 27, the rotating part 58, the clamping chamber 8, the steering rod assembly, the clamping driving mechanism, the jaw driving mechanism, and the jaw assembly 6 all rotate.

In this embodiment, due to the limitation of the first transmission member 118, the second transmission member 120 cannot rotate around the second longitudinal axis 2 of the shaft assembly 1. In order to adapt to the rotation of the main shaft 3, the second transmission member 120 of this embodiment passes The connecting sleeve 128 is connected with the main shaft 3 . Specifically, referring to FIGS. 31-32 , the connecting sleeve 128 is sleeved on the main shaft 3 . The second transmission member 120 is sleeved on the connection sleeve 128 . The proximal end of the second connecting rod 124 is fixedly connected with the connecting sleeve 128 . The second connecting rod 124 is arranged in the second accommodation groove of the main shaft 3, and when the main shaft 3 rotates around the second longitudinal axis 2 of the shaft assembly 1, the second connecting rod 124 is driven to rotate around the second longitudinal axis 2 of the shaft assembly 1. The axis 2 rotates, so that the second connecting rod 124 drives the connecting sleeve 128 to rotate synchronously with the main shaft 3 around the second longitudinal axis 2 of the shaft assembly 1. When the connecting sleeve 128 rotates around the second longitudinal axis 2 of the shaft assembly 1 During the process, the second transmission member 120 does not rotate, that is, there is relative rotation between the connecting sleeve 128 and the second transmission member 120 .

Referring to FIG. 37 , the distal end of the connection sleeve 128 is provided with a first stop portion 129 , and the proximal end of the connection sleeve 128 is provided with a second stop portion 130 . Both the first stop portion 129 and the second stop portion 130 extend circumferentially. The second transmission member 120 is arranged between the first stop portion 129 and the second stop portion 130, thus, when the second transmission member 120 is displaced to the distal end or the proximal end, the second transmission member 120 can act. At the first stop portion 129 or the second stop portion 130 , the connecting sleeve 128 is moved to the distal end or the proximal end, so that the second link 124 is moved to the distal end or the proximal end.

Referring to FIG. 1 , the clip applier further includes a Luer connector 131 connected to a rotating member 132 . The Luer connector 131 in this embodiment is a common Luer connector in the prior art, the purpose is to connect the inside of the clip applier with the outside so as to clean the inside of the clip applier, and the structure of the Luer connector 131 will not be repeated here.

The sleeve 26 has a flushing hole that communicates with the inside of the sleeve 26 . Luer connector 131 has an irrigation channel. The flushing channel has a liquid inlet and a liquid outlet. The liquid outlet of the flushing channel is communicated with the flushing hole of the sleeve 26, and the flushing liquid is injected into the liquid inlet of the Luer connector 131, and the flushing liquid can enter the inside of the clip applier through the flushing channel and the flushing hole so as to facilitate the clamp applicator. The interior is cleaned to remove contamination, allowing the clip applier to be reused. When the sleeve 26 moves forward or backward, the rotating member 132 also moves forward or backward with the sleeve 26, so the Luer connector 131 also moves forward or backward accordingly, thereby avoiding the risk of the Luer connector 131 restricts the forward and backward movement of the cannula 26 and enables the Luer connector 131 to always communicate with the irrigation hole of the cannula 26 . In this embodiment, the flushing hole of the sleeve 26 is disposed inside the rotating member 132 . The liquid inlet of the flushing channel of the Luer connector 131 is located outside the rotating member 132 , and the liquid outlet of the flushing channel is located inside the rotating member 132 and communicates with the flushing hole of the sleeve 26 .

In this embodiment, the jaw assembly 6 is in communication with the outlet 12 of the second cavity 10 of the clip bin 8, and the second cavity 10 is not coaxial with the shaft assembly 1, so the jaw assembly 6 and the shaft assembly 1 are also incompatible. Coaxial, the jaw assembly 6 is offset relative to the shaft assembly 1 , so the first longitudinal axis 7 of the jaw assembly 6 does not coincide with the second longitudinal axis 2 of the shaft assembly 1 .

To sum up, the clip applier in this embodiment is provided with the first backstop part and the second backstop part, so that the clip feeding rod will not retreat and reset before sending the clip to the ready position, thereby avoiding the occurrence of clip feeding failures. By arranging the third anti-retraction part, the problem of failure to clamp blood vessels or tissues caused by the retreat of the clip located in the jaw assembly is avoided, which ensures smooth clipping and improves the reliability and safety of the operation.

The clip applier in this embodiment is provided with a clip feeding drive mechanism for performing the clip feeding action, and a jaw driving mechanism is provided for performing the jaw closing action, which cancels the clamp pushing action and reduces the risk of failure during the clip feeding process. probability, improving the stability of the clamping action.

In the clip applier in this embodiment, the movement of the clip feeding drive mechanism and the jaw drive mechanism are independent and time-sharing, which can prevent some problems caused by the linkage of the two, such as complex structure and complex motion relationship.

In the clip applier in this embodiment, when the jaw assembly 6 is closed, there is a preset distance between the switching mechanism and the transmission assembly along the second longitudinal axis 2 of the shaft assembly 1, so that when the switching mechanism moves to the distal end , will never be in contact with the transmission assembly, the transmission assembly will not hinder the movement of the switching mechanism, and the movement of the switching mechanism and the movement of the transmission assembly will not interfere with each other.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible implementations of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or implementation that does not depart from the technical spirit of the present invention All changes should be included within the protection scope of the present invention.

Claims (15)

1. The clip applier is characterized by comprising a clip cabin, a jaw assembly, a clip feeding driving mechanism, a retaining mechanism and an actuating piece; the clamping bin comprises a clamp; the clip feed drive mechanism includes a first drive member and a clip feed lever, the actuator driving the first drive member to move such that the clip feed lever urges the clip from the clip cartridge into the jaw assembly; the retaining mechanism comprises a guide pivot piece, wherein the guide pivot piece is provided with a first retaining part, a second retaining part and a third retaining part, and the second retaining part is positioned between the first retaining part and the third retaining part;

The actuating member having an open position, an intermediate position and a closed position, the clip being in a ready position when the actuating member is in the intermediate position;

the first and second stops are positioned in sequence proximal to the first driver to prevent retraction of the first driver in response to movement of the actuator from the open position to the intermediate position;

in response to movement of the actuating member from the intermediate position to the closed position, the third stop is located proximal to the first driver and is held in abutment with the first driver to prevent retraction of the first driver;

the first driving member is separated from the third stopping portion when the actuating member is located at the closed position.

2. The clip applier of claim 1, wherein said first drive member has a home position, a first position, a second position, and a third position; the first driving piece is positioned at the initial position when the actuating piece is positioned at the opening position, and the first driving piece is positioned at the third position when the actuating piece is positioned at the middle position;

the first stopping part is positioned at the proximal end of the first driving piece when the first driving piece moves from the initial position to the first position;

The first driving piece is positioned between the first stopping part and the second stopping part before moving from the first position to the second position;

the second retaining portion is located at the proximal end of the first driving member when the first driving member moves from the first position to the second position;

before the first driving piece moves from the second position to the third position, the first driving piece is positioned between the second stopping part and the third stopping part;

the third stop is located at a proximal end of the first drive member when the first drive member moves from the second position to the third position.

3. The clip applier of claim 2, wherein said jaw assembly defines a first longitudinal axis; the clip cartridge includes at least two clips stacked in a predetermined direction that is at an angle to the first longitudinal axis, wherein the clip aligned with the jaw assembly along the first longitudinal axis is a first clip.

4. The clip applier of claim 3, wherein said first driver drives said clip feed bar to move said first clip until fully out of the clip magazine, said first driver being positioned between said first stop and said second stop to prevent said first driver from backing out.

5. The clip applier of any one of claims 1, 4, wherein said second stop is distal to said first stop, a proximal end of said first stop having a first guide surface, a distal end of said first stop having a first stop surface, said first driver being movable from said first guide surface between said first stop and said second stop, said first stop surface abutting said first driver upon retraction of said first driver to prevent retraction thereof.

6. The clip applier of claim 3, wherein said first driver drives said clip feed bar to move said first clip completely out of said clip magazine and before said ready position is reached, said first driver being positioned between said second stop and said third stop to prevent said first driver from backing out.

7. The clip applier of any one of claims 1, 6, wherein said third stop is distal to said second stop, a proximal end of said second stop having a second guide surface, a distal end of said second stop having a second stop surface, said first driver being movable from said second guide surface between said second stop and said third stop, said second stop surface abutting said first driver upon retraction of said first driver to prevent retraction thereof.

8. The clip applier of claim 3, wherein said first driver drives said clip feed bar to move said first clip to said ready position, said first driver moving to and abutting a distal end of said third stop to prevent said first driver from backing out.

9. The clip applier of any one of claims 1, 8, wherein a proximal end of said third stop has a third guide surface, a distal end of said third stop has a third stop surface, said first driver is movable from said third guide surface to a distal end of said third stop, said third stop surface is abuttable against said first driver upon retraction of said first driver to prevent retraction thereof.

10. The clip applier of claim 1, wherein said actuator has a guide channel comprising a start point, a first stop point, a second stop point, a third stop point, and an end point; the stopping mechanism further comprises a guide member arranged on the guide pivot member, at least part of the guide member is accommodated in the guide channel and can move in the guide channel, and the guide member sequentially moves from the starting point to the first stopping point, the second stopping point, the third stopping point and the end point in response to the actuating member moving from the opening position to the closing position.

11. The clip applier of claim 10, wherein said first stop is located at a proximal end of said first driver to prevent said first driver from backing in response to movement of said guide from said start point to said first stop point;

in response to movement of the guide member from the first stop point to the second stop point, the second stop portion is located at a proximal end of the first drive member to prevent the first drive member from backing;

in response to movement of the guide member from the second stop point to the third stop point and before movement from the third stop point to the end point, the first drive member abuts a distal end of the third stop portion to prevent the first drive member from backing.

12. The clip applier of claim 11, wherein said third stop is disengaged from said first drive member in response to movement of said guide member from said third stop point to said end point.

13. The clip applier of claim 10, wherein said first drive member has a home position, a first position, a second position, and a third position;

when the guide piece is positioned at the starting point, the first driving piece is positioned at the initial position;

When the guide piece is positioned at the first stopping point, the first driving piece is positioned at the first position;

when the guide piece is positioned at the second stopping point, the first driving piece is positioned at the second position;

when the guide piece is positioned at the third stopping point, the first driving piece is positioned at the third position;

the first driver is maintained in the third position until the guide moves from the third stop point to the end point.

14. The clip applier of claim 10, wherein said clip applier comprises a housing, said backstop mechanism further comprising a biasing spring; the guide pivot piece is also provided with a pivot part, a guide part and a force receiving part, wherein the pivot part is arranged between the guide part and the force receiving part;

the pivoting part is pivotally connected with the shell so that the guide pivoting piece can rotate relative to the shell, the guide piece is arranged on the guide part, and the biasing spring is abutted with the stress part;

the motion of the actuating piece drives the guide piece to move around the pivoting part under the action of the biasing spring, so that the first stopping part, the second stopping part and the third stopping part can be sequentially positioned at the proximal end of the first driving piece to prevent the first driving piece from retreating.

15. The clip applier of claim 1, wherein said first drive member is disengaged from said actuator member when said actuator member is in said intermediate position, and said third stop abuts said first drive member to prevent said first drive member from backing.

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