CN116407203A

CN116407203A - Clip applier

Info

Publication number: CN116407203A
Application number: CN202111664507.3A
Authority: CN
Inventors: 孙宝峰; 程涛; 乔志晨
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-11

Abstract

The invention discloses a clip applier, which comprises a clip bin, 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, and the actuator member is capable of driving the first drive member to move so that the clip feed lever urges the clip into the jaw assembly. The retaining mechanism includes a guide pivot member having a first retaining portion, a second retaining portion, and a third retaining portion. The actuator has an open position, an intermediate position, and a closed position, and the clip is in the ready position when the actuator is in the intermediate position. Before the actuating piece moves from the opening position to the closing position, the first stopping part, the second stopping part and the third stopping part can sequentially prevent the first driving piece from retreating, so that the occurrence of clamp feeding faults is avoided, the problem that a clamp positioned in the jaw assembly retreats to cause the incapability of clamping blood vessels or tissues is avoided, smooth clamp application is ensured, and the reliability and safety of an operation are improved.

Description

Clip applier

Technical Field

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

Background

Clips are often used to clamp blood vessels or tissue during surgery to reduce bleeding. The manner in which the clip closes the vessel or tissue is simple and can be performed quickly, and therefore, the use of the clip in surgery has increased dramatically. Clip appliers are devices that apply such clips to blood vessels or tissue.

The traditional clip applier can only be used once, the jaw of the clip applier is sent into a body after one clip is installed outside the body, the clip application is performed, and the single clip is repeatedly installed, so that the clip applier is inconvenient to use. In recent years, continuous clip appliers capable of continuously applying a plurality of clips have been in trend.

The clip applier of the successive clips is provided with a plurality of clips which, in use, are applied sequentially to the blood vessel or tissue. In particular, a clip applier that sequentially applies clips is provided with a clip feeding assembly that is capable of sequentially pushing a plurality of clips into the jaw assembly. The prior art continuous clip applier is prone to clip feeding failure when pushing the clip into the jaw assembly. For example, when a previous clip is not fully fed into the jaw assembly, the clip feeding assembly has been reset and when the clip is pushed again, the clip feeding assembly will push the next clip instead of continuing to push the previous clip that did not fully enter the jaw assembly, thereby causing a clip feeding failure.

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

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a clip applier, which solves the technical problem that the clip applier is easy to cause the prior reset of a clip feeding rod to cause the clip feeding failure.

The invention is realized by the following technical scheme:

a clip applier comprises a clip cabin, a jaw assembly, a clip feeding driving mechanism, a backstop 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.

Further, the first driver 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.

Still further, the 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.

Still further, before the first driving piece drives the clamp conveying rod to push the first clamp to move to the complete clamp discharging bin, the first driving piece is located between the first stopping portion and the second stopping portion so as to prevent the first driving piece from retreating.

Still further, the second stopping portion is located at a distal side of the first stopping portion, a proximal end of the first stopping portion has a first guiding surface, a distal end of the first stopping portion has a first stopping surface, the first driving member is capable of moving from the first guiding surface to a position between the first stopping portion and the second stopping portion, and the first stopping surface abuts against the first driving member to prevent the first driving member from retreating when the first driving member retreats.

Still further, the first driving member drives the clip feeding rod to push the first clip to move to the position after the clip feeding rod is completely out of the clip bin and before the first driving member reaches the preparation position, and the first driving member is located between the second stopping portion and the third stopping portion so as to prevent the first driving member from retreating.

Further, the third stopping portion is located at a distal side of the second stopping portion, a proximal end of the second stopping portion has a second guiding surface, a distal end of the second stopping portion has a second stopping surface, the first driving member is capable of moving from the second guiding surface to a position between the second stopping portion and the third stopping portion, and the second stopping surface abuts against the first driving member to prevent the first driving member from retreating when the first driving member retreats.

Further, when the first driving member drives the clamping rod to push the first clip to move to the preparation position, the first driving member moves to the distal end of the third retaining portion and abuts against the distal end of the third retaining portion to prevent the first driving member from backing.

Further, the proximal end of the third retaining portion has a third guide surface, the distal end of the third retaining portion has a third retaining surface, the first driver is movable from the third guide surface to the distal end of the third retaining portion, and the third retaining surface is capable of abutting the first driver to prevent the first driver from backing back when the first driver backs up.

Further, the actuator has a guide channel including 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.

Still further, in response to movement of the guide member from the start point to the first stop point, the first stop portion is located at a proximal end of the first driver to prevent the first driver from backing;

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.

Still further, the third stop is disengaged from the first driver in response to movement of the guide from the third stop point to the end point.

Still further, the first driver 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.

Still further, the clip applier includes a housing, and the backstop mechanism further includes 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.

Further, when the actuating member is located at the intermediate position, the first driving member is disengaged from the actuating member, and the third retaining portion abuts against the first driving member to prevent the first driving member from backing.

Compared with the prior art, the invention has the beneficial effects that: according to the clamp applier disclosed by the invention, the first retaining part and the second retaining part are arranged, so that the clamp conveying rod cannot be retracted and reset before the clamp is conveyed to the preparation position, the clamp conveying fault is avoided, the problem that the clamp in the jaw assembly cannot clamp a blood vessel or tissue due to the retraction of the clamp is avoided by arranging the third retaining part, the smooth clamp application is ensured, and the reliability and safety of an operation are improved.

Drawings

FIG. 1 is a schematic view of a first angle of a clip applier provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a second angle of the clip applier provided by an embodiment of the invention;

FIG. 3 is a schematic view of a third angle of the clip applier provided by an embodiment of the invention;

FIG. 4 is a schematic view of a portion of a fourth angular field of a clip applier provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of a portion of a fifth angular field of a clip applier provided in accordance with an embodiment of the invention;

FIG. 6 is a schematic view of a portion of a first angular section of a clip applier provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view of a base according to an embodiment of the present invention;

FIG. 8 is a schematic view of an actuator at a first angle according to an embodiment of the present invention;

FIG. 9 is a schematic view of a portion of a sixth angular field of a clip applier provided in accordance with an embodiment of the invention;

FIG. 10 is a schematic view of a seventh angle of the clip applier provided by the embodiment of the invention, FIG. 10 being a top view of FIG. 1;

FIG. 11 is a schematic view of a portion of an eighth angular area of a clip applier provided in accordance with an embodiment of the invention;

FIG. 12 is a schematic view of a portion of a ninth angled clip applier provided in accordance with an embodiment of the invention;

FIG. 13 is a schematic view of a portion of a tenth angular area of a clip applier provided in accordance with an embodiment of the invention;

FIG. 14 is a schematic view of a cartridge according to an embodiment of the present invention;

FIG. 15 is a cross-sectional view of an eleventh angle of the clip applier provided in accordance with an embodiment of the invention, wherein the clip feed lever does not perform a clip feed action;

FIG. 16 is a cross-sectional view of an eleventh angle of the clip applier provided in accordance with an embodiment of the invention, wherein the clip feed lever feeds the clip to the ready position;

17A-17B are schematic structural views of a guide pivot member provided in accordance with embodiments of the present invention;

FIG. 18 is a schematic view of a first angle of the clip applier provided by an embodiment of the invention, with the actuator in the open position;

FIG. 19 is a schematic view of a first angle of the clip applier provided by an embodiment of the invention, wherein the first drive member is moved to a first position;

FIG. 20 is a schematic view of a first angle of the clip applier provided by an embodiment of the invention, wherein the actuator is in an intermediate position;

FIG. 21 is a schematic view of a first angle of the clip applier provided by an embodiment of the invention, with the actuator in a closed position;

FIG. 22 is a schematic view of a portion of a first angular section of a clip applier provided in accordance with an embodiment of the present invention;

FIG. 23 is a schematic view of a guide channel according to an embodiment of the present invention;

FIG. 24 is a schematic view of a second angle of an actuator provided in accordance with an embodiment of the present invention;

FIGS. 25A-B are schematic diagrams illustrating the construction of a path switch member according to embodiments of the present invention;

FIG. 26 is a schematic view of a third angle of an actuator provided in accordance with an embodiment of the present invention;

FIG. 27 is a schematic view of a twelfth angle of the clip applier provided by the embodiment of the invention;

FIG. 28A is a state diagram of the path switch member with the actuator member in the open position;

FIG. 28B is a state diagram of the path switch member prior to movement of the actuator member from the open position to the closed position;

FIG. 29A is a state diagram of the path switch member with the actuator member in the closed position;

FIG. 29B is a state diagram of the path switch member prior to the actuator member being reset and reaching the open position;

FIG. 30 is a schematic view of a thirteenth angle of the clip applier provided by the embodiment of the invention;

FIG. 31 is a schematic view of a fourteenth angle of clip applier provided in accordance with an embodiment of the invention;

FIG. 32 is a schematic view of a fifteenth angle of the clip applier provided in accordance with an embodiment of the invention;

FIG. 33A is a schematic view of the engagement of the operating element with the locking member, wherein the operating element is in a locked state;

FIG. 33B is a schematic view of the engagement of the operating element with the locking member, wherein the operating element is in an unlocked state;

FIG. 34 is a schematic view of a first angle of the clip applier provided by an embodiment of the invention, primarily for the purpose of showing the connector;

figure 35 is a schematic view of a sixteenth angle of a clip applier provided in accordance with an embodiment of the invention,

FIG. 36 is a schematic view of a first angle of the clip applier provided by the embodiment of the invention, mainly for illustrating the mating manner of the connector and the spindle;

FIG. 37 is a schematic view of a connecting sleeve according to an embodiment of the present invention;

reference numerals of the above drawings: 2-a second longitudinal axis; 3-a main shaft; 4-a retainer ring; 5-a first accommodating groove; a 6-jaw assembly; 7-a first longitudinal axis; 8, clamping the bin; 9-a first cavity; 10-a second cavity; 11-inlet; 12-outlet; 13-actuator, 14-grip; 15-pushing claws; 16-a pivoting end; 17-a handle housing; 18-a first head housing; 19-a second head housing; 20-a second limiting surface; 21-a limiting plate; 22-a first driving member; 23-annular flanges; 24-clamping rod; 25-an outer tube; 26-sleeve; 27-closing the tube; 29-a base; 30-a first rod body; 31-a second rod body; 32-a sliding groove; 33-a limit part; 34-a weight-reducing tank; 35-pushing part; 36-a base; 37-a first socket; 38-a first card slot; 39-a second socket; 40-a second clamping groove; 41-a first kidney-shaped aperture; 42-a second kidney-shaped aperture; 43-a first guiding surface; 44-a second guide surface; 45-guiding columns; 46-a first clutch; 47-column; 48-a stop; 49-clamping blocks; 50-a first spring; 51-a first push column; 52-a second pushing column; 53-a first pivot axis; 54-a second pivot axis; 55-a second spring; 56-a third spring; 57-fourth springs; 58-rotating member; 59-clip; 60-a third clip; 61-a second clip; 62-a first clip; 63-torsion spring; 64-first torsion arm; 65-second torsion arm; 66-pushing plate; 67-guide pivot; 68-a first stop; 69—a first guide surface; 70-a first stop surface; 71-a second stop; 72-a third stop; 73-a pivoting part; 74-a guide; 75-a force receiving part; 76-a first swivel arm; 77-a second swivel arm; 78-a third swivel arm; 79-reinforcing ribs; 80-a biasing spring; 81-a guide; 82-a guide channel; 83-main channel; 84-slave channel; 85-a first wall; 86-blocking wall; 87-a second wall; 88-a guide wall; 89-starting point; 90-a first stop point; 91-a second stop point; 92-a third stop point; 93-end point; 94-path switching member; 95-a pivot; 96-a first trigger; 97-a second trigger; 98-an execution unit; 99-baffle; 101-first guide ribs; 102-a first guiding ramp; 103-second guide ribs; 104-a second guiding ramp; 105-convex; 106-a first recess; 107-a second recess; 108-an operating element; 109-bump; 110-locking member; 111-a depression; 112-a drive rod; 113-a shaft body; 114-a fifth spring; 115-a first jawarm; 116-a second jawarm; 117-sixth spring; 118-a first transmission member; 119-a first tooth; 120-a second transmission member; 121-a second tooth; 122-limit teeth; 123-a first link; 124-a second link; 125-connectors; 126-a first plane; 127-a second plane; 128-connecting sleeve; 129-first stop; 130-a second stop; 131-luer fitting; 132-a rotating member; 133-a first connection; 134-a second connection; 135-through holes; 136-a first pin; 137-a second pin; 138-opening; 139-third longitudinal axis.

Detailed Description

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

It will be appreciated that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle assembly of a clip applier. The term "proximal" refers to the portion proximal to the clinician, and the term "distal" refers to the portion distal to the clinician. I.e., the handle assembly is proximal and the jaw assembly is distal, e.g., the proximal end of a component represents an end relatively close to the handle assembly and the distal end represents an end relatively close to the jaw assembly. However, clip appliers may be used in many orientations and positions, and therefore these terms expressing relative positional relationships are not limited and absolute.

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

The term "first direction" as used herein refers to a direction perpendicular to the plane of the paper in fig. 1, with reference to the direction and angle of placement of the clip applier in fig. 1. The "second direction" refers to the up-down direction (i.e., the vertical direction). The "first direction" and the "second direction" are perpendicular to each other.

Referring to fig. 1, the present embodiment provides a clip applier, and in particular, a clip applier that is a continuous clip applier for applying a clip 59 to a human body, such as a blood vessel or other tissue other than a blood vessel.

The clip applier of 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 cartridge 8. The cartridge 8 has a clip 59. The jaw assembly 6 is disposed at the distal end of the shaft assembly 1.

The operating assembly includes a housing and an actuating member 13 movably mounted on the housing, the housing being divided into a head housing and a handle housing 17 extending from a lower side of the head housing in a positional relationship, the handle housing 17 and the actuating member 13 constituting a handle assembly, a user can grasp the handle housing 17 with one hand and pull the actuating member 13 with a finger to move the actuating member 13 relative to the housing. Those skilled in the art will readily appreciate that while an actuator 13 is shown and described, the clip appliers disclosed herein may not necessarily include an actuator 13, e.g., the clip appliers may be motorized and may include an actuation button for actuating a motor to control firing of the device.

In this embodiment, part of the transmission mechanism is accommodated in the housing of the operation assembly, and part of the transmission mechanism is located in the shaft assembly 1. To achieve the clip feeding action and the jaw closing action (clip applying action), the transmission mechanism includes a clip feeding drive mechanism and a jaw drive mechanism. The clamp feeding driving mechanism is used for executing clamp feeding action, and the jaw driving mechanism is used for executing jaw closing action.

The transmission mechanism alternatively has a first state and a second state. In the first state, the clip feeding drive mechanism drives the clip 59 of the clip magazine 8 to move to the jaw assembly 6, so that the clip 59 is stably held in the jaw assembly 6 to await clip application. In the second state, the jaw drive mechanism drives the jaw assembly 6 in motion, causing the jaw assembly 6 to close, such that the clip 59 in the jaw assembly 6 grips the tissue or blood vessel.

The actuator 13 is used to power the transmission. Specifically, the transmission mechanism further comprises a switching mechanism, and the switching mechanism is used for selectively driving the clip feeding driving mechanism or the jaw driving mechanism. The actuator 13 is in contact with the switching mechanism to supply power to the switching mechanism, and the switching mechanism transmits the power to the clip feed drive mechanism or the jaw drive mechanism. The actuator 13 is capable of driving the switching mechanism distally. When the transmission mechanism is in the first state, the switching mechanism moves distally to drive the clip feeding driving mechanism to move distally. After the switching mechanism moves to the far end by a preset stroke, the transmission mechanism is switched 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 drive mechanism to move distally.

The switching mechanism is operatively connected to a jaw drive mechanism having a push portion 35, which is capable of pushing the jaw drive mechanism distally by pushing the push portion 35. Specifically:

when the transmission mechanism is in a first state, the switching mechanism is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move; the switching mechanism is separated from the pushing portion 35 of the jaw drive mechanism, and when the switching mechanism drives the clip feeding drive mechanism to move, the jaw drive mechanism is not driven to be in a stationary 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 does not advance any more; the switching mechanism is combined with the pushing portion 35 of the jaw drive mechanism to drive the jaw drive mechanism to move so that the jaw drive mechanism drives the jaw assembly 6 to move.

In this embodiment, the movement of the clip feeding driving mechanism and the jaw driving mechanism is performed independently and in a time-sharing manner, so that some problems caused by the linkage of the two mechanisms, such as complex structure and complex movement relationship, can be prevented.

In this embodiment, the doctor operates one actuating member 13, and 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 the two different driving mechanisms can complete corresponding actions according to a preset sequence. Namely, a doctor can finish two actions of feeding and closing the jaws in one overall stroke by operating one actuating piece 13, and the two actions meet a preset sequence, so that the problem of mutual interference can not occur, the safety and smoothness of the operation of the doctor are ensured, the operation is simple, and the operation is friendly to users.

Referring to fig. 2 and 12, the pinch drive mechanism includes a first drive member 22, and a pinch bar 24 coupled to the first drive member 22. The shaft assembly 1 includes a main shaft 3. The first driving member 22 is sleeved on the main shaft 3 and can move along the main shaft 3. The spindle 3 is provided with a first accommodation groove 5, the first accommodation groove 5 extending in the longitudinal direction of the spindle 3. The pinch lever 24 is located in the first accommodating groove 5 and moves in the first accommodating groove 5. The proximal end of the feed bar 24 is connected to the first driver 22 and the distal end of the feed bar 24 is capable of acting on the clip 59.

The first drive member 22 is capable of driving movement of the clip feed bar 24 and thereby the clips 59 of the cartridge 8 into the jaw assembly 6. Specifically, in the first state, the switching mechanism is operatively connected to the first drive member 22 to perform a clip feeding action, and the switching mechanism drives the first drive member 22 distally such that the clip feeding bar 24 moves distally to urge the clips 59 of the clip cartridge 8 against the jaw assembly 6. In the second state, the switching mechanism is disengaged from the first driver 22, the first driver 22 no longer advances, and the clip 59 has been stably clamped in the jaw assembly 6.

Referring to fig. 3-5, the jaw drive mechanism includes an outer tube 25 and a second drive member with which the switching mechanism is operatively connected. The outer tube 25 is sleeved 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 (specifically described later), and the proximal end of the outer tube 25 is connected with a second driving member, and the second driving member can drive the outer tube 25 to move so as to drive the jaw assembly 6 to move.

The pushing portion 35 is disposed on the second driving member. The switching mechanism moves the second driving member distally by driving the pushing portion 35. In the first state, the switching mechanism is separated from the pushing portion 35, the switching mechanism does not drive the second driving member to move distally, and the second driving member is in a stationary state. In the second state, the switching mechanism abuts against the pushing portion 35 to perform the 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 fig. 4-5, 11, the second driving member includes a base 29, a first rod 30, and a second rod 31. The base 29 is sleeved on the main shaft 3, and the distal end of the base 29 is connected with the proximal end of the outer tube 25. The base 29 has a first side and a second side, the first side and the second side being disposed opposite in a first direction. The first side extends outward with a first connecting portion 133 and the second side extends outward with a second connecting portion 134. The distal end of the first rod 30 is connected to the first connecting portion 133, and the distal end of the second rod 31 is connected to the second connecting portion 134. The two rod bodies are arranged in the embodiment to enable the movement of the second driving piece to be more balanced and improve the overall stability of the transmission mechanism. Of course, only one rod body may be provided.

The structure of the two rods is substantially the same, and the structure of one rod is described as an example. The rod body is provided with a sliding groove 32, and the sliding groove 32 is a closed groove. The pushing portion 35 is disposed on the rod body, and specifically, the pushing portion 35 is disposed at a distal end of the sliding groove 32. Since the second driving member includes two rod bodies in this embodiment, the jaw driving mechanism has two pushing portions 35. To reduce the weight of the rods, each rod is further provided with a weight-reducing slot 34, the weight-reducing slot 34 being located distally of the sliding slot 32. The pushing portion 35 is provided between the slide groove 32 and the weight reduction groove 34. The purpose of the weight reduction 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 the sliding groove 32 is to guide the switching mechanism, which is at least partially moved in the sliding groove 32, so that the movement of the switching mechanism is more stable, the specific construction of which 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 whole structure of the switching mechanism more compact, fully utilize the space inside the clip applier, and make the movement of the switching mechanism smoother, a part of the first clutch mechanism is accommodated in the base 36, and at least a part of the second clutch mechanism is accommodated in the base 36. The actuator 13 abuts the base 36 to provide power to the switching mechanism such that the switching mechanism moves distally.

Referring to fig. 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 driver 22 is accommodated in the through hole 135, and the through hole 135 penetrates through the distal end face and the proximal end face of the base 36, so that the first driver 22 can pass through the through hole 135. When the transmission mechanism is in the second state, the first driving member 22 is not advanced any more, the base 36 is still advanced, 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 46 is connected to 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 member is separated from the pushing portion 35 of the second driving member, and the first clutch member 46 is connected with the first driving member 22, so that the switching mechanism can drive the first driving member 22 to move so as to move the clamping rod 24, thereby executing the clamping movement.

When the transmission mechanism is in the second state, the first clutch member 46 is separated from the first driving member 22 under the action of the clutch switching mechanism; the second clutch member abuts against the abutting portion 35 of the second driving member, so that the switching mechanism can drive the second driving member to move to drive the outer tube 25 to move, thereby performing the jaw closing action. 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 fig. 1:

Referring to fig. 4 and 6, the base 36 has first and second opposite sides in a first direction. A first socket 37 is provided on a first side of the base 36 and a second socket 39 is provided on a second side of the base 36. The first sleeving part 37 is sleeved on the first rod body 30 and can move along the first rod body 30, and the second sleeving part 39 is sleeved on the second rod body 31 and can move along the second rod body 31. Thereby, an operable connection of the switching mechanism with the second drive member is achieved. The first side portion is further provided with a first kidney-shaped aperture 41 and the second side portion is further provided with a second kidney-shaped aperture 42. The first kidney-shaped hole 41 is provided above the first socket portion 37, and the second kidney-shaped hole 42 is provided above the second socket portion 39. Each kidney-shaped aperture extends in a second direction.

Referring to fig. 2-3, 5-6, the clutch switching mechanism includes a guide post 45. A guide rail is provided in the head housing, on which guide rail the guide post 45 is movable, the guide post 45 being connected to the first clutch 46.

Specifically, the clip applier head housing includes a first head housing 18 and a second head housing 19. The first head housing 18 and the second head housing 19 are symmetrically arranged along the axial direction of the spindle 3. The guide rail may alternatively be provided on the inner wall of the first head housing 18 or the inner wall of the second head housing 19. In order to make the movement of the guide post 45 on the guide rail smoother, the guide rail is symmetrically provided at 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 a guide rail, and the inner wall of the second head housing 19 is also provided with a guide rail. The guide post 45 has a first end and a second end. The first end of the guide post 45 moves on the guide rail of the inner wall of the first head housing 18 and the second end of the guide post 45 moves on the guide rail of the inner wall of the second head housing 19.

The guide rail comprises 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 with the second guide surface 44 by a slope so that the movement of the guide post 45 is smoother.

The guide post 45 is able to follow the movement of the first clutch 46 and move on the guide rail. The first clutch member 46 is held in engagement with the first driving member 22 while the guide post 45 moves on the first guide surface 43. Since the second guide surface 44 is higher than the first guide surface 43, the guide post 45 moves onto the second guide surface 44 of the guide rail to drive the first clutch member 46 to move upward, so that the first clutch member 46 is separated from the first driving member 22. And when 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 jaw driving mechanism to push the jaw driving mechanism to move. The clutch switching mechanism has the advantages that on one hand, the clutch switching mechanism is simple in structure, no additional device is needed, the internal space of the shell is fully utilized, and the structure is compact; 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 a first end of the guide post 45 extends from the first kidney-shaped hole 41 and is positioned on a guide rail of the inner wall of the first head housing 18. The second end of the guide post 45 extends from the second kidney-shaped hole 42 and is positioned on a guide rail on the inner wall of the second head housing 19. Since each kidney-shaped hole extends in the second direction, the guide post 45 is enabled to move in the second direction (i.e., up and down).

Referring to fig. 5-6 and 12, the first driver 22 is an annular member, and an outer peripheral surface of the first driver 22 is provided with an annular rib 23.

Referring to fig. 4-6, the first clutch 46 is received in the base 36. The first clutch 46 includes a cylinder 47, a stopper 48, and a latch 49. The upper end of the column 47 is connected to the guide post 45, such that the column 47 can drive the guide post 45 to move distally or proximally, while the guide post 45 can drive the column 47 to move in the second direction. The block 48 is disposed at the bottom end of the column 47, and the latch 49 is disposed at the bottom end of the block 48, where the projection of the latch 49 on the plane perpendicular to the second direction is located inside the projection of the block 48 on the plane.

The bottom end of the latch 49 is detachably coupled to the first driving member 22. The bottom end surface of the clamping block 49 is an arc-shaped surface matched with the surface of the first driving piece 22, so that the clamping block 49 is connected with the first driving piece 22 more stably. In the first state, the clamping block 49 is located at the proximal end of the annular flange 23, the distal end surface of the clamping block 49 abuts against the proximal end surface of the annular flange 23, and the clamping block 49 can push the annular flange 23 distally, so that the first driving member 22 moves distally. In the second state, the latch 49 moves upward to be separated from the annular rib 23.

The proximal end surface of the latch 49 is an inclined surface, whereby, when the first driving member 22 and the first clutch member 46 are reset (described later in detail), the proximal end surface of the latch 49 can pass through the distal end of the annular rib 23, so that the latch 49 returns to the proximal end of the annular rib 23.

The first clutch 46 also includes a first spring 50. The first spring 50 is sleeved on the column 47, the upper end of the first spring 50 is abutted against the guide column 45, and the lower end of the first spring 50 is abutted against the upper end of the stop block 48. In the first state, the first spring 50 is in a compressed state, and the first spring 50 applies a downward force to the stop block 48, so that the bottom end of the clamping block 49 is in more stable contact with the first driving piece 22, and the stability of the clamping feeding action is improved.

In summary, when the transmission mechanism is in the first state, under the action of the actuating member 13, the base 36 moves distally, the first clutch member 46 moves distally, the guide post 45 moves distally along the first guide surface 43 under the action of the first clutch member 46, and when the guide post 45 moves from the first guide surface 43 to the second guide surface 44, the guide post 45 drives the first clutch member 46 to move upwards, so that the first clutch member 46 is separated from the first driving member 22, and the transmission mechanism is switched to the second state.

Referring to fig. 4-5, the second clutch member includes two push posts, namely a first push post 51 and a second push post 52. The first pushing post 51 is located in the sliding groove 32 of the first rod 30 and can move in the sliding groove 32 of the first rod 30, and both the upper end and the lower end of the first pushing post 51 are connected with the first sleeving part 37. The first pushing post 51 is matched with the pushing portion 35 of the first rod 30. The second pushing post 52 is located in the sliding groove 32 of the second rod 31 and can move in the sliding groove 32 of the second rod 31, and the upper end and the lower end of the second pushing post 52 are connected with the second sleeving part 39. The second pushing post 52 is matched with the pushing portion 35 of the second rod body 31. Since the sliding groove 32 is a closed groove, the push post does not escape from the sliding groove 32.

The second clutch member may also include only one push post. In this embodiment, two pushing posts are provided to make the pushing of the rod body by the switching mechanism more balanced and stable. According to the embodiment, the two rod bodies, the two sleeving parts and the two pushing posts are arranged, so that the movement of the switching mechanism is balanced, the movement of the second driving piece is balanced, and the overall stability of the transmission mechanism is improved.

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

When the transmission mechanism is in the second state, the first pushing post 51 is abutted against the pushing portion 35 of the first rod body 30, and the second pushing post 52 is abutted against the pushing portion 35 of the second rod body 31, so that the second clutch member drives the second driving member to move distally, and the outer tube 25 moves distally to close the jaw assembly 6.

As described above, the actuator 13 abuts the base 36 to provide power to the switching mechanism such that the switching mechanism moves distally.

Referring to fig. 7-8, a first clamping groove 38 is provided at the proximal end of the first socket portion 37, and a second clamping groove 40 is provided at the proximal end of the second socket portion 39. Correspondingly, the actuator 13 has a holding portion 14 and symmetrically arranged pushing claws 15 extending from the holding portion 14 into the head housing, one pushing claw 15 is disposed in the first clamping groove 38, and the other pushing claw 15 is disposed in the second clamping groove 40. The grip portion 14 is for holding by a user. Thus, the force applied to the base 36 by the actuator 13 is more uniform, the abutment of the actuator 13 with the base 36 is more stable, and the base 36 can be smoothly advanced.

The inner wall of the first head housing 18 of the clip applier is provided with a first limiting surface (not shown in the drawings), the first limiting surface is matched with the bottom end surface of the first sleeving part 37, the bottom end of the first sleeving part 37 is positioned on the first limiting surface, and the first limiting surface extends along the moving track of the first sleeving part 37. Referring to fig. 9, a second limiting surface 20 is disposed on an inner wall of the second head housing 19 of the clip applier, the second limiting surface 20 is matched with a bottom end surface of the second sleeving part 39, a bottom end of the second sleeving part 39 is located on the second limiting surface 20, and the second limiting surface 20 extends along a moving track of the second sleeving part 39. Thus, when the base 36 moves distally or proximally, 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 movement of the base 36 is more stable and precise. The first and second stop surfaces 20 are substantially identical in structure.

Referring to fig. 1 and 10, in this embodiment, the jaw assembly 6 is pivotally connected to the shaft assembly 1 such that the jaw assembly 6 is rotatable relative to the shaft assembly 1 about a first pivot axis 53. In particular, the jaw assembly 6 defines a first longitudinal axis 7 and the shaft assembly 1 defines a second longitudinal axis 2, the jaw assembly 6 being rotatable relative to the shaft assembly 1 about a first pivot axis 53 such that the first longitudinal axis 7 is parallel or angled to the second longitudinal axis 2, thereby facilitating adjustment of the position and angle of the jaw assembly 6 by a practitioner for ease of use.

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

Referring to fig. 11, a transmission assembly is operatively connected to the spindle 3. The transmission assembly comprises a first transmission member 118 and a second transmission member 120, the second transmission member 120 is sleeved on the main shaft 3, and the first transmission member 118 is in transmission connection with the second transmission member 120. The transmission assembly is located proximally of the seat 29 and distally of the abutment 35. That is, the transmission assembly is substantially located between the seat 29 and the abutment 35. The transmission assembly is arranged between the seat 29 and the abutment 35 for a more compact overall layout of the instrument and for easier handling, in particular the operating element 108 should be as close to the handle assembly as possible, so that the operating element 108 can be operated by the same hand that operates the handle assembly. The operation of doctors is more convenient, and the operation efficiency can be improved.

In this embodiment, the operating element is close to the actuating member 13, and in the example of fig. 3, the operating element 108 is located at the upper left of the actuating member 13 and close to the actuating member 13, and in the actual operation process, the doctor holds the handle housing 17 with his thumb, operates the operating element 108 with his index finger, and the other fingers can operate the actuating member 13, so that the clip applier can be completely operated with only one hand. Since the transmission assembly is driven by the operating element 108, it is preferable to arrange the transmission assembly between the seat 29 and the abutment 35, in order to achieve an efficient transmission of forces and a compact construction, the transmission assembly should be as close as possible to the operating element. The specific structure of the transmission assembly, the steering rod assembly and the operating element will be described in detail later.

Just because the transmission assembly is located between the base 29 and the pushing portion 35, the distance between the base 29 and the pushing portion 35 is increased, so that the base 29 and the pushing portion 35 need to be connected through a rod, as described above, in order to reduce the weight of the rod, the weight reducing groove 34 needs to be formed in the rod, so that the weight of the rod is effectively reduced, and the whole weight of the clip applier is lighter and more convenient to use.

As described above, the distal movement of the switching mechanism along the spindle 3 can bring the second clutch member into abutment with the abutment portion 35 of the second driving member. When the second clutch member 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, a predetermined distance is provided between the switching mechanism and the transmission assembly in the direction of the second longitudinal axis 2 of the shaft assembly 1. In other words, when the switching mechanism moves to the far end, the switching mechanism is not contacted with the transmission assembly all the time, the transmission assembly is arranged so as not to obstruct the movement of the switching mechanism, and the movement of the switching mechanism and the movement of the transmission assembly can not interfere with each other.

Referring to fig. 4-5, the clip applier further includes a first restoring member configured to store a first energy during distal movement of the switching mechanism. The first energy is released, and the switching mechanism moves to the near end to reset under the action of the first reset piece. Specifically, the first restoring member includes two second springs 55. One of the second springs 55 is sleeved on the first rod 30, the proximal end of the second spring abuts against the distal end of the first sleeve-connecting portion 37, and the distal end of the second spring abuts against the first connecting portion 133 of the base 29. The other second spring 55 is sleeved on the second rod body 31, the proximal end of the second spring abuts against the distal end of the second sleeve-connecting portion 39, and the distal end of the second spring abuts against the second connecting portion 134 of the base 29. In the process of moving the switching mechanism to the distal end, the first sleeving part 37 gradually approaches the first connecting part 133, meanwhile, the second sleeving part 39 gradually approaches the second connecting part 134, the two second springs 55 can be compressed to store first energy, the first energy is released, and the switching mechanism can move to the proximal end to reset.

Referring to fig. 5 and 12, a limiting portion 33 is disposed at a proximal end of each sliding groove 32, and in an initial state (i.e., when the switching mechanism is not moved distally), the push post abuts against the limiting portion 33 of the sliding groove 32 where the push post is located under the action of the first reset member. When the base 36 of the switching mechanism is reset under the action of the first reset piece, the pushing column slides proximally in the sliding groove 32 to be in contact with the limiting part 33, and due to the limitation of the limiting part 33, the pushing column can stop at the limiting part 33, so that the base 36 of the switching mechanism can be reset to the position.

Referring to fig. 4-5, the clip applier also includes a second restoring member. The second restoring member is capable of storing a second energy during distal movement of the clip feed mechanism. And releasing the second energy, and moving the clip feeding driving mechanism to the proximal end for resetting under the action of the second resetting piece. Specifically, the second restoring member includes a third spring 56, and the third spring 56 is sleeved on the spindle 3. The proximal end of the third spring 56 is in abutment with the distal end face of the annular flange 23 of the first driver 22, the distal end of the third spring 56 is in abutment with the collar 4 outside the spindle 3, the collar 4 extends in the circumferential direction of the spindle 3, and the collar 4 is arranged proximally of the transmission assembly. During the process of driving the first driving member 22 to move distally, the annular flange 23 of the first driving member 22 gradually approaches the retainer ring 4, so that the third spring 56 is compressed to store the second energy, release the second energy, and the first driving member 22 can move proximally to reset, that is, the clip feeding driving mechanism moves proximally to reset.

Referring to fig. 12, the clamp feed lever 24 is accommodated in the first accommodation groove 5. In the initial state (i.e. when the pinch bar 24 is not moved distally), the proximal end of the pinch bar 24 can abut against the proximal end surface of the first accommodation groove 5 under the action of the second restoring member. When the first driving member 22 moves and resets proximally under the action of the second resetting member, the clamping rod 24 moves to the position where the proximal end thereof abuts against the proximal end surface of the first accommodating groove 5, so that the clamping rod 24 stops moving proximally and resets to the position. The first driver 22 also stops moving proximally under the influence of the pinch rod 24.

Referring to fig. 3 and 11, the clip applier also includes a third restoring member. The third reset piece can store third energy in the process of moving the jaw driving mechanism to the distal end, the third energy is released, and the jaw driving mechanism moves to the proximal end to reset under the action of the third reset piece. Specifically, the third restoring 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 face of the housing 29, and the distal end of the fourth spring 57 abuts against the inner wall of the head housing. The fourth spring 57 is compressed to store the third energy and release the third energy during the distal movement of the second driver by the switching mechanism, and the second driver is capable of moving proximally for return, i.e., the jaw drive mechanism moves proximally for return.

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 disposed on the inner walls of the first head housing 18 and the second head housing 19. In an initial state (i.e. when the jaw drive mechanism is not moved distally), the seat 29 of the second drive member abuts the stop plate 21 under the influence of the third reset member. When the second driving member moves and resets proximally under the action of the third resetting member, the seat 29 moves to abut against the limiting plate 21, and the second driving member can stop moving proximally due to the limiting effect of the limiting plate 21, so that the second driving member can be reset to the position.

Referring to fig. 13, the clip applier of this embodiment also includes a rotating member 58. The jaw assembly 6 is pivotally connected to the shaft assembly 1 by a swivel 58. The proximal end of the rotating member 58 is pivotally connected to the distal end of the spindle 3 such that the rotating member 58 can rotate about the first pivot axis 53 relative to the shaft assembly 1, the distal end of the rotating member 58 being connected to the jaw assembly 6. Specifically, the jaw assembly 6 includes a first and a

second jawarms

115, 116 pivotally connected to the distal end of the rotatable member 58, the first and

second jawarms

115, 116 being movable toward each other, the jaw assembly 6 being rotatable with the rotatable member 58, i.e., the jaw assembly 6 being rotatable with respect to the shaft assembly 1 about the first pivot axis 53 by the rotatable member 58, when the rotatable member 58 is rotated with respect to the shaft assembly 1 about the first pivot axis 53.

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

The number of the clamps 59 of the clamp bin 8 is adjustable, the number of the clamps 59 does not influence the normal use of the clip applier, and the number of the clamps 59 can be adjusted according to the use requirement in actual use. During a surgical procedure, a sequential clamping process typically applies three clips 59 to tissue or blood vessels, so that the cartridge 8 in this embodiment includes three clips 59.

Referring to fig. 14, the cartridge 8 comprises a first chamber 9 and a second chamber 10. With the placement direction and angle of the clip applier in fig. 14 as 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 face of the cartridge 8 to form an inlet 11 of the second cavity 10, and the distal end of the second cavity 10 intersects the distal end face of the cartridge 8 to form an outlet 12 of the second cavity 10.

The three clips 59 of the clip magazine 8 are a clip 60, a clip 61 and a clip 62 in this order from top to bottom. The clip 60 and the clip 61 are provided in the first chamber 9, and the clip 62 is provided in the second chamber 10. The cartridge 8 further includes a biasing assembly capable of applying a generally downward force to the upper end surface of the clip 60. Specifically, the biasing assembly includes a torsion spring 63 and a push plate 66. Torsion spring 63 has a first torsion arm 64 and a second torsion arm 65. If no external force is applied, the two torsion arms of the torsion spring 63 will be in a naturally stretched state. In the natural extended state, the first torsion arm 64 and the second torsion arm 65 are disposed substantially in the up-down direction in fig. 14. In this embodiment, the first torsion arm 64 of the torsion spring 63 is clamped in the clip housing 8, and the second torsion arm 65 of the torsion spring 63 rotates by a certain angle relative to its natural extended state and then acts on the clip 60, so that an acting force can be applied to the clip 60. The second torsion arm 65 of the torsion spring 63 is connected to the push plate 66. The torsion spring 63 applies a force to the clip 60 through the push plate 66, whereby the force receiving area can be increased, so that the torsion spring 63 can act on the clip 60 more stably.

Referring to fig. 15, in an initial state (i.e., before the pinch rod 24 performs a pinch action), the distal end of the pinch rod 24 extends from the inlet 11 of the second chamber 10 into the second chamber 10. Thus, as the cartridge 8 rotates relative to the shaft assembly 1, the feed bars 24 flex under the influence of the cartridge 8 to accommodate the rotation of the cartridge 8. The clamp feed bar 24 is made of a resilient material, including but not limited to metal, that allows the clamp feed bar 24 to be flexible and capable of bending to accommodate rotation of the clamp magazine 8.

Referring to fig. 16, as the feed bar 24 moves distally (i.e., forwardly) pushing the clip 62 against the jaw assembly 6 and before the feed bar 24 moves to reset, the feed bar 24 abuts the bottom of the clip 61 so that neither the clip 60 nor the clip 61 moves downwardly.

When the clamping bar 24 is moved distally (i.e., forwardly) to push the clip 62 against the jaw assembly 6, and the clamping bar 24 is moved to reset, both the clip 60 and the clip 61 move downwardly under the influence of the biasing assembly, such that the clip 61 enters the second cavity 10 to enable continued clamping. The downward movement of clip 60 and clip 61 under the bias of the biasing assembly is referenced to the angle and direction of placement of the clip applier in fig. 14-16. Clip 60 and clip 61 can still move into second cavity 10 under the influence of the biasing assembly as the clip applier's direction and angle of placement change.

As described 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 such that the first clutch member 46 pushes against the first driver member 22 to move distally, and thereby the clip feed lever 24 to move distally, the clip feed lever 24 pushes against the clip 59 from the proximal end of the clip 59 in the second cavity 10 to push the clip 59 to the jaw assembly 6, at which point the clip 59 is in the ready position for the clip feed completion time. The ready position, i.e., the position where the clip 59 is stably gripped by the jaw assembly 6 and can be effectively compressed to a closed state, if the clip 59 slides within the jaw assembly 6 so that it is not in the ready position, insufficient support of the clip 59 during application can result in automatic ejection of the clip 59 or twisting of the clip 59, resulting in poor compression.

When the user manipulates the actuating member 13 such that the clip feed bar 24 pushes the clip 62 into the jaw assembly 6, if the user inadvertently releases the actuating member 13 before the clip feed bar 24 pushes the clip 62 into the ready position, the switching mechanism is retracted under the influence of the first reset member, causing the clip feed bar 24 to be retracted. Since the clip 62 has been pushed forward by a certain stroke, after the clip feed lever 24 is retracted, the clip 60 and the clip 61 move downward to the second cavity 10, and when the user again manipulates the actuator 13 to drive the clip feed lever 24 to move distally, the clip feed lever 24 pushes the clip 61 and the clip 62 simultaneously, and the clip 61 interferes with the clip 62, so that the clip cannot be fed normally. Therefore, in the present invention, before the clip feeding lever 24 pushes the clip 62 into the ready position, the clip feeding lever 24 is kept at the proximal end of the clip 62 against the clip 62 and supports the clip 61 and the clip 60, and even if the user carelessly releases the actuator 13, the clip feeding lever 24 does not retreat, and the clip 61 and the clip 60 do not advance into the second chamber 10.

As described above, when the transmission mechanism is in the second state, the switching mechanism is separated from the clip feeding driving mechanism, and the switching mechanism is combined with the pushing portion 35 of the jaw driving mechanism, so that the clip applier performs the jaw closing operation. The user manipulates the actuating member 13 and the second clutch member pushes the second drive member distally so that the outer tube 25 moves distally to close the jaw assembly 6 and thereby close the clip 59 in the jaw assembly 6, at which point the clip 59 in the ready position is applied to tissue or a blood vessel for the time of clip application.

When the jaw assembly 6 is closed to close the clip 59, the clip 59 will tend to move proximally when forced closed, resulting in poor clamping, and therefore, the clip applier of the present invention, with the drive mechanism in the second state, maintains the clip feed bar 24 at the proximal end of the clip 59 against the clip 59 to prevent the clip 59 from backing out of the clip. 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 does not move proximally, so that the clip feeding lever 24 can continue to abut the clip 59 at the proximal end of the clip 59. When the jaw assembly 6 is fully closed, at which point the clip 59 has been applied to the tissue or vessel, the clip feed drive mechanism is moved proximally in return.

In order to achieve the above effect, the clip applier according to the embodiment further includes a retaining mechanism. The retaining mechanism is accommodated in the head housing.

As described above, the actuator 13 is movably connected to the housing. Pulling on the actuator 13 causes the actuator 13 to move relative to the housing, the actuator 13 movement being in three particular positions: an open position, an intermediate position, and a closed position. Specifically, referring to fig. 18, at an initial time, the user does not operate the actuator 13, and the actuator 13 is in the open position. Referring to fig. 20, when the user operates the actuator 13 and the clip feeding is completed, the position of the actuator 13 is the intermediate position, and when the actuator 13 is positioned at the intermediate position, the clip 59 is positioned at the ready position. Referring to fig. 21, the user operates the actuator 13, and at the time of completion of clamping, the actuator 13 is in the closed position.

Specifically, before the actuator 13 moves from the open position to the intermediate position, the switching mechanism is combined with the clip feeding driving mechanism, and the clip applier performs the clip feeding action. "before moving to the intermediate position" means that the actuator 13 has not moved to the intermediate position. When the actuator 13 is in the intermediate position, the switching mechanism is separated from the clip feeding driving mechanism, and the switching mechanism is coupled to the pushing portion 35 of the jaw driving mechanism. The actuation member 13 moves from the intermediate position to the closed position and the clip applier performs a jaw closing action.

Referring to fig. 6 and 9, the backstop mechanism includes a guide pivot 67. Referring to fig. 17A-17B, the guide pivot 67 has a first stop 68, a second stop 71 and a third stop 72. The second stopper 71 is located between the first stopper 68 and the third stopper 72. Specifically, the first stopping portion 68 is located proximal to the second stopping portion 71, and the third stopping portion 72 is located distal to the second stopping portion 71.

As described above, the clip feed drive mechanism includes the first drive member 22 and the clip feed bar 24, and the actuator 13 can drive the first drive member 22 to move such that the clip feed bar 24 pushes the clip 59 into the jaw assembly 6.

The first and second stops 68, 71 are positioned at the proximal end of the first driver 22 in sequence to prevent the first driver 22 from backing out in response to movement of the actuator 13 from the open position to the intermediate position. Before the clip 59 enters the ready position, if the user inadvertently releases the actuating member 13, the first driving member 22 will abut against the first retaining portion 68 or the second retaining portion 71, so that the first driving member 22 will not retract, and the clip feeding lever 24 will always remain at the proximal end of the clip 59 against the clip 59, thereby avoiding a clip feeding error.

In response to movement of the actuator 13 from the intermediate position to the closed position, the third stop 72 is located at the proximal end of the first driver 22 and is held in abutment with the first driver 22 to prevent retraction of the first driver 22. "before moving to the closed position" means that the actuator 13 has not moved to the closed position. The first drive member 22 does not retract until the jaw assembly 6 is closed, and the clip feed bar 24 is held at the proximal end of the clip 59 against the clip 59 to prevent the clip 59 from retracting, thereby ensuring clip application stability.

When the actuator 13 is in the closed position, the first driver 22 is separated from the third stop 72. After the clip 59 has been applied to the tissue or blood vessel, the third stop 72 is separated from the first driver 22, the first driver 22 is moved proximally to reset, and the clamping bar 24 is moved proximally to reset.

Since the base 36 of the switching mechanism has the through hole 135, the first driver 22 is accommodated in the through hole 135, and the through hole 135 penetrates through the distal end face and the proximal end face of the base 36, when the first driver 22 moves proximally, the first driver 22 can pass through the through hole 135 to abut against one of the first stop portion 68, the second stop portion 71, and the third stop portion 72.

The first driver 22 has a home position, a first position, a second position, and a third position. The initial position, i.e. the position in which the user has not manipulated the actuating member 13 and the first driving member 22 has not been moved. The switching mechanism drives the first driving member 22 to move from the initial position to the distal end, sequentially through the first position, the second position and then to the third position. When the actuator 13 is in the open position, the first driving member 22 is in the home position. When the actuator 13 is in the intermediate position, the first driving member 22 is in the third position. The first driving member 22 is held in the third position before the actuating member 13 moves from the intermediate position to the closed position.

Referring to fig. 19, the first driver 22 is located distally of the first stop 68 as the first driver 22 moves from the initial position to the first position. Specifically, when the first driver 22 is moved distally from the initial position to the first position, the first driver 22 reaches just the distal end of the first stop 68. At this time, if the first driver 22 moves proximally, the proximal end of the first driver 22 will abut against the first stopper 68 and cannot continue to retract.

Note that, the proximal movement means movement in a direction toward the proximal end of the clip applier, and the distal movement means movement in a direction toward the distal end of the clip applier, for convenience of description. Meanwhile, the proximal and distal ends among others are also the proximal and distal ends 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 stopping portion 68 and the second stopping portion 71. Specifically, the first driver 22 is moved distally between the first stop 68 and the second stop 71 during the process of moving the first driver 22 distally from the first position to the second position. During this movement, if the first driving member 22 moves proximally, the proximal end of the first driving member 22 will abut against the first stopping portion 68 and cannot continue to retract.

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 retaining portion 71. Specifically, when the first driving member 22 is located at the second position, the first driving member 22 just reaches the distal end of the second retaining portion 71. At this time, if the first driver 22 moves proximally, the proximal end of the first driver 22 abuts against the second stopper 71 and cannot continue to retract.

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 stopping portion 71 and the third stopping portion 72. Specifically, the first driver 22 is moved distally between the second stop 71 and the third stop 72 during the process of moving the first driver 22 from the second position to the third position. During this movement, if the first driving member 22 moves proximally, the proximal end of the first driving member 22 will abut against the second stopping portion 71 and cannot continue to retract.

Referring to fig. 20, when the first driver 22 moves from the second position to the third position, the first driver 22 is located distally of the third stop 72. Specifically, when the first driving member 22 is located at the third position, the first driving member 22 just moves to the distal end of the third stopping portion 72, and the third stopping portion 72 abuts against the proximal end of the first driving member 22, and at this time, if the first driving member 22 moves proximally, the proximal end of the first driving member 22 abuts against the third stopping portion 72 and cannot continue to retract.

When the first driver 22 is in the third position, the actuator 13 is in the intermediate position, and the actuator 13 is continued to be manipulated such that the third stop 72 is always in abutment with the proximal end of the first driver 22 to prevent the first driver 22 from backing out until the actuator 13 is moved from the intermediate position to the closed position.

Referring to fig. 21, the third stop 72 is disengaged from the first driver 22 when the actuator 13 is moved from the intermediate position to the closed position.

As described above, the jaw assembly 6 defines a first longitudinal axis 7. Referring to fig. 15, the clip 59 aligned with the jaw assembly 6 along the first longitudinal axis 7 is a first clip, i.e., the clip 62 is a first clip. The clip 62 is located within the second cavity 10 of the clip cartridge 8. First driver 22 moves distally to drive clip feed bar 24 to move clip 62. When the first driver 22 moves to the second position, the clips 62 move to the clip ejection chamber 8. When the first driver 22 is moved to the third position, the clip 62 enters the ready position.

Referring to fig. 19, first driver 22 drives clip feed lever 24 to move clip 62 until fully out of clip magazine 8, first driver 22 is positioned between first stop 68 and second stop 71 to prevent first driver 22 from backing. Before the clip feed lever 24 drives the clip 62 to move completely out of the clip magazine 8, at this time, the distal 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 upper portion of the clip feed lever 24. If the clamp feeding bar 24 is retracted, the proximal end of the clamp 61 falls into the second cavity 10 under the action of the biasing component, and when the clamp feeding bar 24 moves forward again, the distal end of the clamp feeding bar 24 pushes the clamp 61 against the clamp 62, so that the clamp feeding bar 24 cannot send the clamp 62 to the ready position due to the interference of the clamp 61, and the clamp feeding failure occurs. The clamp feed bar 24 of this embodiment does not retract until the clamp 62 moves completely out of the clamp magazine 8, so that no clamp feed failure occurs.

After the first driving member 22 drives the clip feed lever 24 to push the clip 62 to move to the fully out of the clip magazine 8 and before reaching the ready position, the first driving member 22 is located between the second stopping portion 71 and the third stopping portion 72 to prevent the first driving member 22 from retreating. When the clamp feeding rod 24 drives the clamp 62 to move to the position after completely leaving the clamp bin 8 and before the clamp feeding rod reaches the preparation position, at this time, the clamp 61 is abutted against the upper part of the clamp feeding rod 24, if the clamp feeding rod 24 is retracted and restored at this time, the clamp 61 falls into the second cavity 10 completely under the action of the biasing component, and when the clamp feeding rod 24 moves forwards again, the distal end of the clamp feeding rod 24 can push the clamp 61 and can not continue to push the clamp 62, so that the clamp feeding fault occurs. The clamp feed lever 24 of this embodiment does not retract until the clamp 62 moves to the ready position, so that no clamp feed failure occurs.

Referring to fig. 20, when first driver 22 drives clip feed lever 24 to push clip 62 to the ready position, first driver 22 moves to the distal end of third stop 72 and abuts the distal end of third stop 72 to prevent first driver 22 from backing. When the clamp bar 24 drives the clamp 62 to move to the ready position, the clamp bar 24 is retracted. During closure of the jaw assembly 6, the clip 62 is forced back out of the way. The clamp feeding bar 24 of the embodiment does not retract before and during the closing of the jaw assembly 6, and can abut the clamp 62 to prevent the clamp from retracting, so that the normal clamping can be ensured.

In this embodiment, the first retaining portion 68 and the second retaining portion 71 are provided, so that the clip feeding rod 24 does not return to the original position before the clip is fed to the ready position, thereby avoiding the occurrence of a clip feeding failure, and the third retaining portion 72 is provided, thereby avoiding the problem that the clip 62 located in the jaw assembly 6 returns to cause the inability to clamp the blood vessel or tissue, ensuring smooth clip application, and improving the reliability and safety of the operation.

Referring to fig. 17, the proximal end of the first stopping portion 68 has a first guide surface 69, the distal end of the first stopping portion 68 has a first stopping surface 70, the first driver 22 is movable from the first guide surface 69 between the first stopping portion 68 and the second stopping portion 71, and the first stopping surface 70 is capable of abutting the first driver 22 to prevent the first driver 22 from being retracted when the first driver 22 is retracted.

The third stopping portion 72 is located distally of the second stopping portion 71, the proximal end of the second stopping portion 71 has a second guiding surface, the distal end of the second stopping portion 71 has a second stopping surface, the first driver 22 is movable from the second guiding surface to between the second stopping portion 71 and the third stopping portion 72, and the second stopping surface is capable of abutting the first driver 22 to prevent the first driver 22 from being retracted when the first driver 22 is retracted.

The proximal end of the third stop portion 72 has a third guide surface, the distal end of the third stop portion 72 has a third stop surface, the first driver 22 is movable from the third guide surface to the distal end of the third stop portion 72, and the third stop surface is capable of abutting the first driver 22 to prevent the first driver 22 from backing back when the first driver 22 backs up.

Specifically, referring to fig. 17, the first guide surface 69 is an arcuate surface, and the first guide surface 69 is at an obtuse angle to the direction of movement of the first driver 22, such that the first driver 22 can move along the first guide surface 69 into the distal end of the first stop 68. The first stop surface 70 is at an acute or right angle to the direction of movement of the first driver 22 such that the first driver 22 cannot move along the first stop surface 70 to the proximal end of the first stop portion 68, but can instead abut the first stop surface 70.

The first guide surface 69, the second guide surface and the third guide surface have substantially the same structure as the first driving member 22, and the structure of the second guide surface and the third guide surface and the matching method with the first driving member 22 are not described in detail. The first stop surface 70, the second stop surface, and the third stop surface are substantially identical in structure and the manner of engagement with the first driver 22, and the structure of the second stop surface and the third stop surface and the manner of engagement with the first driver 22 are not described in detail.

When the first driving member 22 moves to the first guiding surface 69 of the first stopping portion 68, the first driving member 22 applies a force to the first stopping portion 68, the guiding pivot member 67 moves downward by a certain distance under the action of the biasing spring 80 (see below), and at this time, the guiding member 81 also moves downward by a certain distance in the guiding channel 82, so that the first stopping portion 68 moves downward to enable the first driving member 22 to pass through the first stopping portion 68, and when the first driving member 22 moves to the distal end of the first stopping portion 68 after passing through the first stopping portion 68, the guiding pivot member 67 moves upward by the action of the biasing spring 80, so that the first stopping portion 68 moves upward again on the movement track of the first driving member 22, so that the first stopping portion 68 can abut against the first driving member 22. The first retaining portion 68, the second retaining portion 71, and the third retaining portion 72 are substantially identical to the first driving member 22 in terms of their engagement, and will not be described in detail herein.

Referring to fig. 17A-17B, 22, the guide pivot 67 of the present embodiment further has a pivot portion 73, a guide 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 pivot 73 is pivotally connected to the housing by a first pin 136 such that the guide pivot 67 is rotatable relative to the housing about the first pin 136. The first stopping portion 68, the second stopping portion 71 and the third stopping portion 72 are all disposed above the pivot portion 73. It should be noted that, since the guide pivot member 67 is rotatable about the first pin 136 with respect to the housing, "the guide pivot member 67 moves down" and "the guide member 81 moves down" mean that, with the counterclockwise rotation of the guide pivot member 67, the portion of the guide pivot member 67 located distal to the pivot portion 73 including the respective stopper portions moves down with respect to each other, and the guide member 81 also moves down with respect to each other. Alternatively, the guide pivot member 67 may be provided to have a structure that moves up and down integrally with the rotation of the actuator 13.

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

In particular, referring to FIGS. 17A-17B, the pilot pivot 67 includes a first pivot arm 76 extending proximally from the pivot 73 and a second pivot arm 77 extending distally from the pivot 73. The first rotating arm 76 has a force receiving portion 75 at the end, and the second rotating arm 77 has a guide portion 74 at the end. The first rotating arm 76 and the second rotating arm 77 form a lever with the first pin 136 of the pivot portion 73 as a fulcrum, the biasing spring 80 and the guide portion 74 are located at both ends of the lever, and when the biasing spring 80 is in a compressed state, the biasing spring 80 applies a pushing force to the force receiving portion 75, so that the guide pivot 67 has a tendency to rotate clockwise, that is, the first retaining portion 68, the second retaining portion 71, the third retaining portion 72 and the guide portion 74 also have a tendency to rotate clockwise.

Referring again to fig. 17-A B, the guide pivot 67 further includes a third arm 78 extending obliquely upward from the pivot 73, the third arm 78 forming an obtuse angle with the first arm 76, the third arm 78 terminating in a first stop 68, a second stop 71 extending distally from the first stop 68, and a third stop 72 extending distally from the second stop 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 guide pivot 67 is more firmly stabilized.

Referring to fig. 8, 18-21, the actuator 13 includes an actuator body, a user-operated grip 14 disposed at one end of the actuator body, and a pusher jaw 15 disposed at the other end of the actuator body, the pusher jaw 15 abutting and pushing against a base 36 of the switching mechanism to move the clip feed drive mechanism or the jaw drive mechanism. The actuator body is provided with a pivot end 16 pivotally connected to the housing, the actuator 13 being rotatable about the pivot end 16. The actuator 13 also has a guide channel 82. The guide channel 82 is located in the actuator body and between the pivot end 16 and the pusher jaw 15. Therefore, the guide channel 82 is arranged on the actuating piece 13, and no additional structure is needed to arrange the guide channel 82, so that the whole structure is compact.

Referring to fig. 18 to 21, the retaining mechanism of the present embodiment further includes a guide member 81, and the guide member 81 is provided to the guide portion 74 of the guide pivot member 67. At least a portion of the guide 81 is received in the guide channel 82. When the actuator 13 rotates about its pivot end 16, the guide channel 82 rotates with it, driving the guide 81 to move about the pivot first pin 136 under the influence of the biasing spring 80.

Referring to fig. 23, the guide channel 82 includes a start point 89, a first stop point 90, a second stop point 91, a third stop point 92, and an end point 93. During the movement of the user operated actuator 13 from the open position to the closed position, the actuator 13 moves, the guide channel 82 moves relative to the guide member 81, and the guide member 81 can move in the guide channel 82 from the start 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 with the movement of the actuator 13. The guide channel 82 is a closed channel, which is a channel surrounded by a periphery, and the guide member 81 is restricted from moving all around in the guide channel 82 and cannot leave the guide channel 82, so that the guide member 81 cannot be separated from the actuator 13 in this embodiment.

The distance from the start 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 less than the distance from the first stop point 90 to the pivot end 16 of the actuator 13 and less than the distance from the second stop point 91 to the pivot end 16 of the actuator 13 and less than the distance from the third stop point 92 to the pivot end 16 of the actuator 13. That is, the first stop point 90, the second stop point 91, and the third stop point 92 are located higher than the start point 89 and the end point 93. When the actuating member 13 is pulled, the actuating member 13 moves to drive the guide member 81 to rotate clockwise from the starting point 89 to lift up to the first stopping point 90 under the action of the biasing spring 80, and the actuating member 13 continues to move so that the guide member 81 moves from the first stopping point 90 to the second stopping point 91 and the third stopping point 92 in sequence, and then moves downward to the end point 93. When the guide 81 moves to the first stopping point 90, the guide pivot 67 rotates upward, so that the first, second, and third stopping

portions

68, 71, and 72 all move upward.

Referring to fig. 18, with the guide 81 positioned at the start point 89, the first driver 22 is positioned at the home 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 81 is located at the second stop point 91, the first driving member 22 is located at the second position. When the guide 81 is located at the third stop 92, the first driver 22 is located at the third position. The first driver 22 remains in the third position until the guide 81 moves from the third stop 92 to the end 93.

Referring to fig. 19, in response to guide member 81 moving from starting point 89 to first stop point 90, guide pivot member 67 has rotated upward, first driver 22 has moved just distal of first stop 68, i.e., first stop 68 is located proximal of first driver 22 to prevent first driver 22 from backing. At this time, when the actuator 13 is released, the first driver 22 moves back a short distance and then abuts against the first stopper 68, and the movement of the first driver 22 is stopped, whereby the movement of the first driver can be prevented from moving back.

The first driver 22 moves distally between the first stop portion 68 and the second stop portion 71 during the movement of the guide 81 from the first stop point 90 to before the second stop point 91. In this process, the actuator 13 is released, and the first driving member 22 moves back a small distance and then abuts against the first stopping portion 68, so that the continuous backward movement is stopped.

When the guide member 81 moves to the second stop point 91, the first driving member 22 is located at the second position, and the first driving member 22 moves just far to the distal end of the second stop portion 71, that is, the second stop portion 71 is located at the proximal end of the first driving member 22 to prevent the first driving member 22 from backing. At this time, when the actuator 13 is released, the first driver 22 moves backward a short distance and then abuts against the second stopper 71, and the backward movement is stopped.

The first driver 22 moves distally between the second stop portion 71 and the third stop portion 72 during the movement of the guide 81 from the second stop point 91 to before the third stop point 92. In this process, when the actuator 13 is released, the first driving member 22 is retracted a small distance and then abuts against the second retaining portion 71, so that the continued retraction is stopped.

Referring to fig. 20, when the guide member 81 moves to the third stop point 92, the first driving member 22 is located at the third position, the first driving member 22 just moves to the distal end of the third stop portion 72, and the first driving member 22 abuts against the distal end of the third stop portion 72 to prevent the first driving member 22 from backing. When the guide 81 moves to the third stop point 92, the actuator 13 is in the neutral position and the clip 59 is in the ready position.

The guide member 81 moves from the third stop point 92 to before the end point 93, the first driving member 22 is always located at the third position, and the third stop portion 72 abuts against the proximal end of the first driving member 22 to prevent the first driving member 22 from backing.

The guide member 81 moves from the third stop point 92 to the end point 93, and the guide pivot member 67 does not move downward, so that the third stop portion 72 can be kept in abutment with the proximal end of the first driving member 22, so that the clip feeding lever 24 can abut the clip 59 at the proximal end of the clip 59, and the clip 59 does not retract during clip application, thereby ensuring clip application stability.

Referring to fig. 21, the third stop 72 is disengaged from the first driver 22 in response to movement of the guide 81 from the third stop 92 to the end 93. Specifically, the guide member 81 reaches the end point 93 at the time of completion of clamping, the guide pivot member 67 moves downward, the third retaining portion 72 moves below the first driving member 22, and the first driving member 22 is reset, and at this time, the actuation is in the closed position.

Referring to fig. 23, the guide passage 82 includes a main passage 83 and only one sub passage 84 extending from an opening 138 of the main passage 83, the opening 138 being located between both ends of the main passage 83. The secondary channel 84 extends from the opening 138 of the primary channel 83 in a direction away from the pivot end 16, i.e., the distance between the secondary channel 84 and the pivot end 16 is greater than the distance between the primary channel 83 and the pivot end 16. The main channel 83 has a start point 89 and an end point 93 at each end. The first stop point 90, the second stop point 91, and the third stop point 92 are all located within the secondary channel 84. The biasing spring 80 applies a force to the guide pivot 67 such that the guide 81 can disengage from the primary channel 83 into the secondary channel 84.

When the guide member 81 moves from the start point 89 of the main passage 83 into the sub passage 84, the guide member 81 moves up to the first stop point 90, and the guide pivot member 67 rotates upward. As the guide 81 moves within the slave channel 84, the guide 81 passes the second stop point 91 and the third stop point 92 in sequence. Before the guide 81 moves from the third stop 92 to the end 93, the guide 81 is still moving from the channel 84, while the third stop 72 is always held in abutment with the first driver 22. When the guide member 81 moves from the third stop point 92 of the channel 84 to the end point 93, the guide member 81 moves downward, causing the guide pivot member 67 to move downward, the third stop 72 moves below the first drive member 22, and the first drive member 22 resets.

The following describes in detail the working procedure of the clip applier according to the present embodiment, from the point of view of the guide 81, in performing the clip feeding operation and the jaw closing operation:

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

18-19, the guide 81 moves from the start point 89 to the first stop point 90, the guide 81 enters the slave channel 84 from the master channel 83, the guide pivot 67 rotates upward, the first stop 68, the second stop 71, and the third stop 72 move upward, and the first driver 22 moves distally of the first stop 68.

The guide member 81 moves from the first stop point 90 to the second stop point 91, and the guide member 81 moves in the passage 84, and the first driver 22 moves from the distal end of the first stop portion 68 to the distal end of the second stop portion 71.

During the movement of the guide member 81 from the starting point 89 to the second stop point 91, the guide post 45 is always moved on the first guide surface 43, the first clutch member 46 is detachably connected to the first driving member 22, and the switching mechanism drives the first driving member 22 to move.

The guide member 81 moves from the passage 84 in the process before the guide member 81 moves from the second stop point 91 to the third stop point 92, and the first driver 22 moves distally between the second stop portion 71 and the third stop portion 72. The guide post 45 continues to move on the first guide surface 43 first, when the guide post 45 moves onto the inclined surface between the first guide surface 43 and the second guide surface 44, the guide member 81 will reach the third stop point 92 without reaching the third stop point 92, and when the guide post 45 is on the inclined surface, the first clutch member 46 is still detachably connected with 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 stop point 92, the guide member 81 is still moving from the channel 84, the first driver 22 just reaches the distal end of the third stop 72, and the third stop 72 abuts the proximal end of the first driver 22. At this time, the guide post 45 just reaches the second guide surface 44, the first clutch member 46 is separated from the first driving member 22, the second clutch member abuts against the abutment portion 35 of the jaw driving mechanism, and the switching mechanism can drive the jaw driving mechanism to move. When the guide 81 reaches the third stop point 92, the actuator 13 is in the intermediate position, at which point the clip feeding drive mechanism has fed the clip 59 to the ready position for the clip feeding completion time.

During the process of moving the guide member 81 from the third stop point 92 to the end point 93, the guide member 81 moves in the passage 84, so that the guide pivot member 67 does not move downward, such that the third stop 72 remains in abutment with the proximal end of the first driver 22. The guide post 45 moves on the second guide surface 44, the second clutch abuts against the abutment portion 35 of the jaw drive mechanism, and the switching mechanism drives the jaw drive mechanism to move.

Referring to fig. 21, when the guide member 81 reaches the end point 93, the guide member 81 enters the main passage 83, the guide pivot member 67 moves downward, the third stopper 72 is separated from the first driving member 22, and the first driving member 22 is reset by the second reset member. At this time, the guide post 45 is located on the second guide surface 44, and the second clutch member abuts against the abutment portion 35 of the jaw driving mechanism. When the guide 81 reaches the end point 93, the actuator 13 is in the closed position, at which point the clip 59 in the ready position is applied to the tissue or vessel at the time of completion of the clip application. When the actuating piece 13 is released, the jaw driving mechanism resets under the action of the third resetting piece, the switching mechanism resets under the action of the first resetting piece, and the actuating piece 13 resets under the drive of the switching mechanism.

Referring to fig. 19, in the present embodiment, when the guide member 81 moves from the start point 89 to the first stop point 90 in the guide channel 82, the first driving member 22 has pushed the clip 59, the position of the clip 59 has changed, if the guide member 81 moves back from the first stop point 90 to the start point 89, the first stop portion 68 moves down and cannot prevent the first driving member 22 from moving back, and if the first driving member 22 moves back, the phenomenon of clip feeding interference and clip feeding error occurs when the next clip feeding operation is performed.

Therefore, in the present embodiment, when the guide member 81 moves from the start point 89 to the first stop point 90 in the guide passage 82, the guide member 81 can be locked by the guide passage 82, and the guide member 81 cannot be retracted from the first stop point 90 to the start point 89. Specifically, referring to FIG. 23, the slave channel 84 includes a blocking wall 86. The main channel 83 comprises 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 being at right or acute angles. This simple angular design of the guide channel 82 ensures that the blocking wall 86 effectively prevents the guide 81 from retracting from the first stop point 90 to the start point 89.

To enable the guide 81 to move from the third stop point 92 to the end point 93, the secondary channel 84 further includes a guide wall 88. The main channel 83 further comprises a second wall 87 extending from the end point 93 to connect with the guide wall 88, the second wall 87 making an obtuse angle with the guide wall 88. This simple angular design of the guide channel ensures that the guide 81 can move from the third stop point 92 to the end point 93.

In this embodiment, the actuator 13 has a positive movement and a return movement. Specifically, from the initial time, the user keeps operating the actuator 13, and the actuator 13 moves from the open position to the intermediate position and then to the closed position. The movement defining the direction of the actuator 13 towards the closed position is a forward movement of the actuator 13. Accordingly, the movement of the actuator 13 in the direction towards the open position is defined as a resetting movement of the actuator 13.

Upon forward movement of the actuator 13, the path of movement of the guide 81 in the guide channel 82 is a first path. Upon a return movement of the actuator 13, the movement path of the guide 81 in the guide channel 82 is a second path. The first motion path includes a master channel 83 and a slave channel 84, and the second motion path includes the master channel 83 and does not include the slave channel 84.

When the actuating member 13 reaches the closed position, the user releases the actuating member 13, and the switching mechanism moves to the proximal end to reset under the action of the first reset member, and the actuating member 13 resets under the action of the switching mechanism, in this process, no stop is needed, the second movement path shields the slave channel 84, so that the guide member 81 is prevented from entering the slave channel 84 from the end point 93 and cannot retract from the first stop point 90 to the start point 89 during the resetting movement, and smooth resetting of the actuating member 13 and the stop mechanism is ensured.

To achieve the above-described shielding of the slave channel 84, the clip applier of the present embodiment further includes a path switching member 94, a positioning mechanism, and a path driving member.

The path switching member 94 has an open state and a closed state. When the path switching member 94 is in the open state, the path switching member 94 gives way to the slave channel 84 to allow the guide member 81 to enter or exit the slave channel 84. When the path switching member 94 is in the closed state, the path switching member 94 shields the slave channel 84 to block the guide member 81 from entering the slave channel 84.

Referring to fig. 24, the path switching member 94 is connected to the actuating member 13. The path switching member 94 is provided between the actuating member 13 and the first head housing 18. As described above, the actuator body is provided with the pivot end 16 pivotally connected to the housing, and the actuator 13 is rotatable about the pivot end 16. The grip 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 fig. 24 to 26, the path switching member 94 includes a pivoting portion 95, a first triggering portion 96, a second triggering portion 97, and an executing portion 98. The pivot portion 95 of the path switching member 94 is connected to the actuator body by a second pin 137. The path switching member 94 is rotatable about the second pin 137 with respect to the actuating member 13. The first trigger portion 96 is disposed on one side of the pivot portion 95, the second trigger portion 97 is disposed on the other side opposite to the pivot portion 95, the actuator 98 is disposed on the first trigger portion 96, the actuator 98 is disposed corresponding to the slave channel 84 of the guide channel 82, and the actuator 98 is used for shielding the slave channel 84. Preferably, the first trigger portion 96 is at an obtuse angle to the second trigger portion 97, and the obtuse angle is toward the first head housing. In other embodiments, the first trigger portion 96 and the second trigger portion 97 may be at an acute angle or a right angle therebetween.

Referring to fig. 25-B, the actuator 98 extends with a shutter 99 toward the opening 138 of the primary channel 83, and when the actuator 98 is tilted toward the actuator 13, the shutter 99 can close the opening 138 of the primary channel 83 to close the secondary channel 84 such that the guide 81 cannot enter the secondary channel 84 from the opening 138, and at this time the guide 81 can only move along the shutter 99 from the end 93 of the primary channel 83 to the start 89 of the primary channel 83.

When the path switching member 94 rotates about the second pin 137 at the pivot portion 95 with respect to the actuator 13, the first trigger portion 96 is caused to rotate toward the inner wall of the first head case 18 or toward the actuator 13, when the first trigger portion 96 rotates toward the inner wall of the first head case 18, the second trigger portion 97 rotates toward the actuator 13, and when the first trigger portion 96 rotates toward the actuator 13, the second trigger portion 97 rotates toward the inner wall of the first head case 18.

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 to the pivot portion 95 of the path switching member 94. When the path switching member 94 rotates about the second pin 137, the protrusion 105 rotates in synchronization therewith. 18-21, both the first recess 106 and the second recess 107 are provided in the actuator body. The protruding portion 105 has elasticity such that the protruding portion 105 can move from within the first recess 106 into the second recess 107 and also from within the second recess 107 into the first recess 106.

When the protruding portion 105 is located in the second recessed portion 107, the second trigger portion 97 is inclined toward the actuator 13, the first trigger portion 96 is inclined toward the inner wall of the first head housing 18, and the actuating portion 98 provided to the first trigger portion 96 is also inclined toward the inner wall of the first head housing 18, so that the actuating portion 98 is away from the sub-passage 84, and the path switching member 94 is in the open state.

When the convex portion 105 is located in the first concave portion 106, the second triggering portion 97 is inclined toward the direction of the inner wall of the first head housing 18, the first triggering portion 96 is inclined toward the actuator 13, and the actuating portion 98 provided to the first triggering portion 96 is also inclined toward the actuator 13, so that the actuating portion 98 closes the slave channel 84, and the path switching member 94 is in the closed state.

When no external force acts, the protruding portion 105 is operatively accommodated in the second recess 107 or the first recess 106, and the protruding portion 105 can be limited by the second recess 107 or the first recess 106, so that the path switching member 94 cannot rotate around the second pin 137, and the path switching member 94 is always kept in the open state or the closed state.

The path switching member 94 and the path driving member are relatively moved during the movement of the actuating member 13. The path driving member is capable of driving the path switching member 94 to switch between an open state and a closed state. Specifically, the path driving member drives the path switching member 94 to rotate about the second pin 137 relative to the actuating member 13 such that the convex portion 105 moves between the second concave portion 107 and the first concave portion 106. When the protruding portion 105 of the path switching member 94 is operatively accommodated in the second recess 107, the path switching member 94 needs to be rotated about the second pin 137 by a first angle along a first predetermined direction to move the protruding portion 105 into the first recess 106. When the protrusion 105 of the path switching member 94 is operatively accommodated in the first recess 106, the path switching member 94 needs to be rotated about the second pin 137 in a second predetermined direction by a second angle to move the protrusion 105 into the second recess 107. The first preset direction and the second preset direction are opposite to each other, 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 guide rib 101 and a second guide rib 103, and the first guide rib 101 and the second guide rib 103 are each provided to an inner wall of the first head casing 18. The first guide rib 101 has a first guide slope 102, and the second guide rib 103 has a second guide slope 104.

At an initial time, the user does not operate the actuator 13, and the actuator 13 is located at the open position, and the path switching member 94 is located at the second guide rib 103 to be disengaged from the first guide rib 101. In response to movement of the actuator 13 from the open position to the closed position, the actuator 13 is able to move the path switching member 94 from the second guide rib 103 to the first guide rib 101. When the actuator 13 is in the closed position, the path switching member 94 is located at the first guide rib 101, and the path switching member 94 is disengaged from the second guide rib 103. In response to movement of the actuator 13 from the closed position to the open position, the actuator 13 is able to move the path switching member 94 from the first guide rib 101 to the second guide rib 103. Specifically:

referring to fig. 28A, initially, when the actuator 13 is in the open position, the first trigger 96 is disengaged from the first guide rib 101, the second trigger 97 is located between the second guide rib 103 and the actuator 13, the second trigger 97 is not abutted against the second guide rib 103, the convex portion 105 is operatively accommodated in the second concave portion 107, the second trigger 97 is inclined toward the actuator 13, the first trigger 96 is inclined toward the inner wall of the first head housing 18, the actuator 98 yields the slave channel 84, and the path switching member 94 is in the open state.

Referring to fig. 28B, during 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 96 moves onto the first guide slope 102 of the first guide rib 101, the first trigger 96 continues to move along the first guide slope 102, and the first guide slope 102 applies a force to the first trigger 96, so that the path switching member 94 starts to rotate about the second pin 137 in the first preset direction, and the protrusion 105 is still operatively accommodated in the second recess 107 due to the insufficient rotation angle, i.e., the first rotation angle, and the second recess 107 limits the protrusion 105, so that the path switching member 94 is always kept in the open state. The guide 81 is able to move within the slave channel 84 during the forward movement of the actuator 13 from the open position to the closed position.

Referring to fig. 29A, at the time when the actuator 13 reaches the closed position, the first trigger 96 of the path switching member 94 moves along the first guide slope 102 between the first guide rib 101 and the actuator 13, the path switching member 94 rotates about the second pin 137 in the first preset direction by a first angle, the protrusion 105 moves from the second recess 107 into the first recess 106, and the path switching member 94 switches to the closed state.

Referring to fig. 29B, in the process before the actuator 13 is reset from the closed position to the open position and reaches the open position, the path switching member 94 is moved from the first guide rib 101 to the second guide rib 103 by the actuator 13, when the second trigger portion 97 moves onto the second guide inclined surface 104 of the second guide rib 103, the second trigger portion 97 continues to move along the second guide inclined surface 104, the second guide inclined surface 104 applies a force to the second trigger portion 97, so that the path switching member 94 starts to rotate about the second pin shaft 137 in the second preset direction, and the protrusion 105 is still operatively accommodated in the first recess 106 due to the insufficient rotation angle, i.e., the second rotation angle, the first recess 106 limits the protrusion 105, and the path switching member 94 is always kept in the closed state. The guide 81 cannot move within the slave channel 84 during the return movement of the actuator 13 from the closed position to the open position and before reaching the open position.

Referring to fig. 28A, when the actuator 13 is moved from the closed position to the open position in a reset manner and reaches the open position, the second trigger 97 of the path switching member 94 moves along the second guide slope 104 between the second guide rib 103 and the actuator 13, so that the path switching member 94 rotates about the second pin 137 by a second angle in a second predetermined direction, the protrusion 105 moves from the first recess 106 into the second recess 107, and the path switching member 94 is switched to the open state.

As described above, the clip applier of the present embodiment further includes a drive 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 by the rotary member 58, and in response to a force being applied to the operating element 108, the operating element 108 moves to drive the transmission assembly such that the steering rod assembly moves to drive the jaw assembly 6 to rotate about the first pivot axis 53 relative to the shaft assembly 1.

Specifically, the operating element 108 is connected to the transmission assembly via a connection assembly. Referring to fig. 31, the connection assembly includes a driving lever 112 and a shaft 113. The drive rod 112 defines a third longitudinal axis 139. The drive rod 112 is connected to a transmission assembly, the third longitudinal axis 139 of the drive rod 112 being at an angle to the second longitudinal axis 2 of the shaft assembly 1, the third longitudinal axis 139 being preferably perpendicular to the second longitudinal axis 2 in this embodiment. The shaft 113 is connected to the driving rod 112, and the direction in which the shaft 113 is disposed is parallel to or at an angle to the direction of the second longitudinal axis 2 of the shaft assembly 1, and in this embodiment, the direction in which the shaft 113 is disposed is preferably parallel to the direction of the second longitudinal axis 2 of the shaft assembly 1. Referring to fig. 33A-33B, the operating element 108 is sleeved on the shaft 113 and can slide along the shaft 113. The operating element 108 is rotatable about a third longitudinal axis 139 of the drive rod 112 and rotates the drive rod 112.

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, and the first tooth portion 119 includes a plurality of first teeth arranged circumferentially such that a central axis of the first tooth portion 119 is perpendicular to the second longitudinal axis 2 of the shaft assembly 1. The second transmission member 120 is sleeved on the main shaft 3, the second transmission member 120 has a second tooth portion 121, and the second tooth portion 121 includes a plurality of second teeth, where the plurality of second teeth are substantially arranged along the second longitudinal axis 2 of the shaft assembly 1. The second tooth 121 is disposed at one side of the second transmission member 120. The plurality of second teeth are arranged in a row. The first toothing 119 of the first transmission member 118 is in meshing engagement with the second toothing 121 of the second transmission member 120.

The first transmission member 118 is connected to the drive rod 112 in the connection assembly. Manipulation of the operating element 108 causes rotation of the drive rod 112 to rotate the first transmission member 118, with the first tooth 119 in meshed engagement with the second tooth 121, causing distal or proximal displacement of the second transmission member 120.

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 having a spacing tooth 122 and the second end also having a spacing tooth 122. That is, the plurality of second teeth of the second tooth portion 121 are located between the two spacing teeth 122. The width of the spacing teeth 122 is greater than the second teeth, and the spacing teeth 122 are not adapted to the first teeth portion 119 of the first transmission member 118, so that the first transmission member 118 cannot be engaged with the spacing teeth 122, so that the first transmission member 118 can only move between the spacing teeth 122 at both ends of the second transmission member 120, and thus, when the first transmission member 118 moves to the spacing teeth 122 at the first end of the second teeth portion 121, the first transmission member 118 cannot move any further. 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 move any further.

It should be noted that, for the movement of the transmission assembly, the first transmission member 118 moves along the second tooth portion 121 of the second transmission member 120, but in actual movement, the first transmission member 118 is not displaced in the direction of the second longitudinal axis 2 of the shaft assembly 1, and the second transmission member 120 is displaced distally or proximally in the direction of the second longitudinal axis 2 of the shaft assembly 1 to drive the steering rod assembly to move, thereby driving the jaw assembly 6 to rotate about the first pivot axis 53 relative to the shaft assembly 1.

Referring to fig. 32, the steering rod assembly includes a first link 123 and a second link 124. The spindle 3 is provided with a second accommodation groove, and the second link 124 is provided in the second accommodation groove and is movable therein. The proximal end of the second link 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 rotary member 58. Thus, when the second transmission member 120 is displaced distally or proximally, the second link 124 is driven to move distally or proximally, such that the first link 123 rotates in the first rotational direction or the second rotational direction relative to the second link 124, and the first link 123 drives the jaw assembly 6 to rotate about the first pivot axis 53 relative to the shaft assembly 1 in the first rotational direction or the second rotational direction.

The operating element 108 of the present embodiment has a locked state and an unlocked state. In the locked state, the operating element 108 is made and can only make a first movement to switch it to the unlocked state. By "do and only do a first movement" it is meant that the operating element 108 does only do a first movement and not do a second movement, and thus not rotate the jaw assembly 6 relative to the shaft assembly 1 about the first pivot axis 53. In the unlocked state, the operating member 108 is capable of a second movement to drive the first transmission member 118 to move, thereby rotating the jaw assembly 6 relative to the shaft assembly 1 about the first pivot axis 53. In the unlocked state, the operating element 108 can be moved a third time to switch it to the locked state.

To achieve locking of the operating element 108, the clip applier of the present embodiment further includes a locking member 110, the locking member 110 being disposed on the head housing. Referring to fig. 33B, the operating element 108 has a projection 109, the projection 109 being located between the lock 110 and the drive lever 112.

Referring to fig. 33A-33B, the locking member 110 has a plurality of recesses 111, each recess 111 is adapted to the protrusion 109 of the operating element 108, each recess 111 can receive the protrusion 109, and the protrusion 109 can be selectively received in one of the recesses 111. In the locked state, the tab 109 of the operating element 108 is operatively retained within one of the recesses 111 of the locking member 110. In the unlocked state, the tab 109 of the operating element 108 is disengaged from the recess 111 in which it is located. Since the operating element 108 is slidable along the shaft 113, the projection 109 of the operating element 108 is movable between the drive lever 112 and the lock 110 to switch the operating element 108 between the locked state and the unlocked state. The operating element 108 slides on the shaft 113 in a direction towards the drive rod 112 as a first movement, the rotation of the operating element 108 about the third longitudinal axis 139 of the drive rod 112 as a second movement, and the operating element 108 slides on the shaft 113 in a direction away from the drive rod 112 as a third movement.

Referring to fig. 33A-33B, clip applier includes a fifth spring 114. The fifth spring 114 is sleeved on the shaft 113, the fifth spring 114 is disposed between the operating element 108 and the driving rod 112, and when the operating element 108 slides on the shaft 113 along the direction towards the driving rod 112 (the first movement), the fifth spring 114 is compressed to store the reset energy, and release the reset energy, so that the operating element 108 can perform the third movement.

In the locked state, in response to a force applied to the operating element 108, the operating element 108 makes a first movement such that the projection 109 of the operating element 108 is disengaged from the recess 111 in which it is located, whereby the operating element 108 is switched from the locked state to the unlocked state.

In the unlocked state, the operating element 108 performs a second movement in response to a force applied to the operating element 108, 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 a force applied to the operating element 108, the operating element 108 performs a third movement such that the projection 109 of the operating element 108 is operatively received in one of the recesses 111 of the locking member 110, whereby the operating element 108 is switched from the unlocked state to the locked state.

Referring to fig. 33A-33B, the locking piece 110 is an arc-shaped member, and a plurality of concave portions 111 are provided at the inner side of the arc-shaped member, each concave portion 111 extending in the radial direction of the arc-shaped member. The plurality of concave portions 111 are arranged substantially circumferentially and the plurality of concave portions 111 are arranged along a movement locus of the second movement of the operation element 108. Therefore, when the operating element 108 rotates by a preset angle, the operating element 108 can perform a third movement under the preset angle, so that the protrusion 109 of the operating element 108 is accommodated in the recess 111 corresponding to the preset angle, and the operating element 108 keeps the preset angle to switch to a locking state, so that the jaw assembly 6 can be stably kept at a certain rotation angle.

The provision of the plurality of recesses 111 of the locking member 110 enables the jaw assembly 6 to be rotated at different angles and to be stably maintained at the rotation angle thereof. In particular, the operating element 108 is capable of driving the jaw assembly 6 in a first rotational direction relative to the shaft assembly 1 about the first pivot axis 53 and is also capable of driving the jaw assembly 6 in a second rotational direction relative to the shaft assembly 1 about the first pivot axis 53. Rotation of the jaw assembly 6 in the first rotational direction includes a bottom-rotated condition in which the jaw assembly 6 is in the first rotational position. Rotation of the jaw assembly 6 in the second rotational direction also includes a bottom-rotated condition in which the jaw assembly 6 is in the second rotational position.

As described above, manipulation of the operating element 108 causes rotation of the drive rod 112 to rotate the first transmission member 118, and the first tooth 119 is engaged with the second tooth 121, such that the second transmission member 120 is displaced distally or proximally. 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 move any further, and the jaw assembly 6 is in the first rotational 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 move any further, and the jaw assembly 6 is in the second rotational position.

The operating element 108 is capable of driving the jaw assembly 6 to rotate to a first rotational position, is also capable of driving the jaw assembly 6 to rotate to a second rotational position, and is capable of driving the jaw assembly 6 to rotate between the first rotational position and the second rotational position. Since the plurality of concave portions 111 of the locking member 110 are disposed along the rotation track of the second movement of the operating element 108, the operating element 108 can perform the third movement after rotating by the preset angle to be selectively accommodated in one of the concave portions 111 corresponding to the preset angle, so that the operating element 108 is switched to the locking state, and the jaw assembly 6 is stably maintained at the first rotation position or the second rotation position or a position between the first rotation position and the second rotation position. In other words, the jaw assembly 6 can be rotated a plurality of angles with respect to the shaft assembly 1 and can be stably maintained at the rotation angle thereof, thereby making the use of the clip applier more flexible. The first rotational position and the second rotational position are both positions of the jaw assembly 6 relative to the shaft assembly 1, with reference to the shaft assembly 1.

Referring to fig. 34 to 35, the outer tube 25 in this embodiment includes a sleeve 26 and a closing tube 27, the sleeve 26 is sleeved on the spindle 3, and the closing tube 27 is sleeved on the cartridge 8 and the rotating member 58. The proximal end of the sleeve 26 is connected to the housing 29 of the second driver, the distal end of the sleeve 26 is pivotally connected to the proximal end of the closure tube 27, and the distal end of the closure tube 27 mates with the jaw assembly 6. The sleeve 26 can be moved proximally or distally such that the closure tube 27 can be moved proximally or distally, thereby opening or closing the jaw assembly 6. Specifically, the jaw assembly 6 includes a first jawarm 115 and a second jawarm 116, and with reference to fig. 32, a sixth spring 117 is disposed between the first and

second jawarms

115, 116. When the closure tube 27 is moved distally (i.e., forwardly), the jaw assembly 6 is received within the closure tube 27 from the distal end of the closure tube 27, at which time the sixth spring 117 is compressed to store energy and the jaw assembly 6 is closed. As the closure tube 27 moves proximally (i.e., rearward), the jaw assembly 6 extends from the distal end of the closure tube 27 and the sixth spring 117 releases energy to open the jaw assembly 6.

The sleeve 26 is pivotally connected to the closure tube 27 and because the closure tube 27 is sleeved over the rotating member 58, the closure tube 27 rotates about the second pivot axis 54 relative to the sleeve 26 in response to the force applied to the closure tube 27 by the rotating member 58 as the rotating member 58 rotates.

The jaw assembly 6 includes an open-to-bottom condition and a fully closed condition. Referring to the placement angle and direction of the clip applier in fig. 34, the distance between the distal ends of the first and

second jawarms

115, 116 is greatest in the up-down direction when the jaw assembly 6 is in the open-to-bottom state, and the distance between the distal ends of the first and

second jawarms

115, 116 is smallest in the up-down direction when the jaw assembly 6 is in the fully closed state. The full closure of the jaw assembly 6 causes the clip 59 between the first and

second jawarms

115, 116 to transition from an open state to a fully closed state for grasping to tissue or a blood vessel. The first pivot axis 53 coincides with the second pivot axis 54 when the jaw assembly 6 is in the open-to-bottom condition and in the fully closed condition.

Referring to fig. 1, 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 about the second longitudinal axis 2 of the shaft assembly 1 by rotating the rotary member 132. As the sleeve 26 moves forward or backward, the rotary member 132 also moves forward or backward with the sleeve 26.

Referring to fig. 34-35, the sleeve 26 is pivotally connected to the closure tube 27 by two connectors 125 in this embodiment, such that the sleeve 26 can drive the closure tube 27 in rotation as the sleeve 26 is rotated about the second longitudinal axis 2 of the shaft assembly 1 by the rotation member 132. That is, by rotating the rotating member 132, the sleeve 26, the two connecting members 125, and the closure tube 27 are all rotated.

Specifically, referring to fig. 36, each of the connectors 125 has a first flat surface 126 fitted with the spindle 3, and the distal end of the spindle 3 has a second flat surface 127 fitted with the first flat surface 126. Thus, when the rotating member 132 rotates to rotate the sleeve 26 to rotate each connecting member 125, each first plane 126 is in form fit with its corresponding second plane 127, so that the spindle 3 follows the rotation of the connecting member 125. That is, when the rotary member 132 is rotated to rotate each of the connection members 125, the connection members 125 can apply a force to the main shaft 3 to drive the main shaft 3 to rotate about the second longitudinal axis 2 of the shaft assembly 1, whereby the main shaft 3 drives the rotary member 58 to rotate, so that the closure tube 27 and the jaw assembly 6 are rotated, thereby facilitating the doctor to adjust the jaw assembly 6 to a proper angle for clamping the blood vessel or tissue. The jaw assembly 6 rotates relative to the shaft assembly 1 about the first pivot axis 53 such that the first longitudinal axis 7 of the jaw assembly 6 is 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 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 spindle 3 to rotate, thereby rotating the closure tube 27, the rotating member 58, the cartridge 8, the steering rod assembly, the clip feed drive mechanism, the jaw drive mechanism, and the jaw assembly 6.

In this embodiment, the second transmission member 120 cannot rotate around the second longitudinal axis 2 of the shaft assembly 1 due to the restriction of the first transmission member 118, and in order to accommodate the rotation of the spindle 3, the second transmission member 120 is connected to the spindle 3 through the connecting sleeve 128. Specifically, referring to fig. 31-32, the connecting sleeve 128 is sleeved on the main shaft 3. The second transmission member 120 is sleeved on the connecting sleeve 128. The proximal end of the second link 124 is fixedly connected to a connection sleeve 128. The second connecting rod 124 is disposed in the second accommodating groove of the spindle 3, when the spindle 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, so that the second connecting rod 124 drives the connecting sleeve 128 to rotate around the second longitudinal axis 2 of the shaft assembly 1 synchronously with the spindle 3, and the second transmission member 120 does not rotate during the rotation of the connecting sleeve 128 around the second longitudinal axis 2 of the shaft assembly 1, 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 sleeve 128 is provided with a first stop 129 and the proximal end of the sleeve 128 is provided with a second stop 130. The first stop portion 129 and the second stop portion 130 are both circumferentially extending. The second transmission member 120 is disposed between the first stop 129 and the second stop 130, such that when the second transmission member 120 is displaced distally or proximally, the second transmission member 120 can act on the first stop 129 or the second stop 130 to move the connecting sleeve 128 distally or proximally to move the second link 124 distally or proximally.

Referring to fig. 1, clip applier further includes luer fitting 131, luer fitting 131 being connected to rotary member 132. The luer connector 131 of this embodiment is a common luer connector in the prior art, so as to communicate the interior of the clip applier with the exterior so as to clean the interior of the clip applier, and the structure of the luer connector 131 is not described herein.

The cannula 26 has a flush hole that communicates with the interior of the cannula 26. Luer fitting 131 has a flush channel. The flushing channel is provided with a liquid inlet and a liquid outlet. The liquid outlet of the flushing channel is communicated with the flushing hole of the sleeve 26, flushing liquid is injected into the liquid inlet of the luer connector 131, and the flushing liquid can enter the interior of the clip applier through the flushing channel and the flushing hole so as to clean the interior of the clip applier and remove pollutants, so that the clip applier can be reused. When the sleeve 26 moves forward or backward, the rotary member 132 also moves forward or backward with the sleeve 26, and thus the luer 131 also moves forward or backward, whereby the luer 131 can be prevented from restricting the forward and backward movement of the sleeve 26 and the luer 131 can be always communicated with the flushing hole of the sleeve 26. The flushing holes of the sleeve 26 in this embodiment are provided in the interior of the swivel 132. The inlet of the flushing channel of luer fitting 131 is located outside of rotary member 132 and the outlet of the flushing channel is located inside of rotary member 132 and communicates with the flushing hole of sleeve 26.

In this embodiment, the jaw assembly 6 communicates with the outlet 12 of the second cavity 10 of the cartridge 8, the second cavity 10 being non-coaxial with the shaft assembly 1, and thus the jaw assembly 6 being non-coaxial with the shaft assembly 1, the jaw assembly 6 being offset with respect to the shaft assembly 1, and thus the first longitudinal axis 7 of the jaw assembly 6 and the second longitudinal axis 2 of the shaft assembly 1 being non-coincident.

In summary, the clip applier in this embodiment is provided with the first retaining portion and the second retaining portion, so that the clip feeding rod does not return to the original position before the clip is fed to the ready position, thereby avoiding the occurrence of clip feeding failure, and by providing the third retaining portion, avoiding the problem that the clip in the jaw assembly returns to cause the failure of clamping blood vessels or tissues, ensuring smooth clip application, and improving the reliability and safety of the operation.

In the clip applier in the embodiment, the clip feeding driving mechanism is arranged for executing the clip feeding action, and the jaw driving mechanism is arranged for executing the jaw closing action, so that the clip pushing action is canceled, the probability of failure in the clip feeding process is reduced, and the stability of the clip feeding action is improved.

In the clip applier according to the present embodiment, the movement of the clip feeding driving mechanism and the movement of the jaw driving mechanism are performed independently and in a time-sharing manner, so that problems caused by the linkage of the two mechanisms, such as a complex structure and a complex movement relationship, can be prevented.

In the clip applier in this embodiment, when the jaw assembly 6 is closed, a preset distance is provided between the switching mechanism and the transmission assembly along the second longitudinal axis 2 of the shaft assembly 1, so that the switching mechanism will not contact with the transmission assembly all the time when moving distally, the transmission assembly will not block the movement of the switching mechanism, and the movement of the switching mechanism and the movement of the transmission assembly can not interfere with each other.

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

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

Claims

1. 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;

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;

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;

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;

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;

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.