CN114680993A

CN114680993A - Clip applier

Info

Publication number: CN114680993A
Application number: CN202011639941.1A
Authority: CN
Inventors: 孙宝峰; 戴霞红
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01
Also published as: WO2022143957A1

Abstract

The invention discloses a clip applier, which comprises a jaw assembly, a clip box, a clip feeding assembly and a clip pushing assembly, wherein N clips are accommodated in the clip box, the clip feeding assembly is used for pushing a first clip at the foremost end to be fed into the jaw assembly, the clip pushing assembly is used for pushing other clips for removing the first clip to advance to a station, two clip arms form a clipping surface when the clips are in an open state, the clip feeding assembly is positioned on the first side of the clipping surface, the clip pushing assembly is positioned on the second side of the clipping surface, and the first side is different from the second side; the clamp feeding assembly and the clamp pushing assembly of the clip applier are independent parts, so that the advancing length of the clamp feeding assembly and the advancing length of the clamp pushing assembly do not need to be equal, the size design of the jaw assembly and the size design of the clamp box can be independent, and the structure is simpler and more compact.

Description

Clip applier

Technical Field

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

Background

It is common during surgery to ligate blood vessels or other tissues of the body either temporarily or permanently to reduce bleeding. There are two ways to ligate a blood vessel, the first being to suture the blood vessel using a needle and surgical suture, and the other being to clamp it with a clip to close the blood vessel. The first suturing method requires a complicated suturing operation by a surgeon, is time-consuming and difficult to perform in endoscopic surgery with limited space and low visibility, and, in contrast, the method in which a clip closes a blood vessel is simple and can be performed quickly, and thus, the use of the clip in endoscopic surgery is drastically increased.

Typically, such clips are applied to blood vessels or other tissue by using an instrument, which is commonly referred to as a clip applier. The traditional clip applier can only be used once, the jaw of the clip applier is sent into the body after a clip is installed outside the body, the clip is applied, the clip is repeatedly installed, and the use is inconvenient. In recent years, a continuous clip applier capable of continuously applying a plurality of clips has been a trend.

It is known to provide a continuous clip applier comprising a jaw assembly, a clip magazine, a handle and a pusher mechanism, the clip magazine being an elongate magazine containing a first clip at a distal end and further clips arranged one behind the other behind the first clip, the clip applier being required to deliver, push and apply the clip, the clip being about to push the first clip into a jaw position, the clip applier being about to push the further clips to move a position in the clip magazine towards a front end so that a new first clip is replenished, the clip applier being about to close the jaws so that the clips located in the jaw assembly close, the handle providing power to drive the clip applier, the clip applier and the clip applier. The pushing mechanism is an integrally formed sheet metal strip, namely a pushing piece, and is installed on the side face of a clamping box, the foremost end of the pushing piece is provided with a pushing piece, the middle end of the pushing piece is provided with a plurality of pushing pieces corresponding to the intervals of other clamps, the pushing pieces and the pushing pieces are all elastically inclined to the main body of the pushing piece, the rearmost end of the pushing piece is connected to a handle, so that the pushing piece is driven to move forwards or backwards by the movement of the handle, when the pushing piece moves forwards, the pushing pieces are inclined from the side face to abut against a first clamp, the pushing pieces are inclined to abut against other clamps, and all the clamps advance simultaneously. The integrated pushing piece has the advantages that the clamping delivering piece and the clamping pushing piece are required to be in a sheet shape, otherwise the clamping delivering piece and the clamping pushing piece collide with the clip to interfere when retreating, but the sheet-shaped structure is not rigid enough and is easy to bend, so that the clamping delivering piece and the clamping pushing piece are unstable, are integrally formed, and have high requirements on production processes; the size of the jaw assembly is designed to meet the advancing length of the clamp, the distance between two adjacent clamps in the clamp box is equal to the advancing length of the push clamp, the push clamp and the push clamp synchronously execute a push sheet, the advancing length of the push clamp is equal to the advancing length of the push clamp, the size design of the jaw assembly and the size design of the clamp box must be matched with each other, the size of the clip applier is not compact, the design is complex, for example, the distance between the adjacent clamps in the clamp box cannot be too small, otherwise, the size of the jaw assembly is too small and cannot be enough to stably clamp the first clamp, the size of the jaw assembly cannot be too large, otherwise, the size of the clamp box is large due to the large distance between the adjacent clamps in the clamp box, and the whole size of the clip applier is large.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a clip applier: comprising a jaw assembly, an operating assembly, and a shaft assembly extending from the operating assembly; the rod body assembly comprises a clamp box, a clamp feeding assembly and a clamp pushing assembly, the clamp box comprises a first end connected to the jaw assembly and a second end opposite to the first end, the clamp box contains N clamps, N is more than or equal to 2, and the N clamps comprise a first clamp, a second clamp, a third clamp and a fourth clamp which are sequentially arranged from the first end to the second end; the clip feeding assembly is used for abutting and pushing the first clip to move forwards to enter the jaw assembly; the clamp pushing assembly is used for abutting against and pushing the second clamp to the Nth clamp to move forwards, and the clamp comprises a first clamp arm, a second clamp arm and a connecting part positioned between the first clamp arm and the second clamp arm; the operating assembly drives the clamp feeding assembly and the clamp pushing assembly to move forwards and drives the jaw assembly to close the jaws; the clip feeding assembly is positioned on a first side of the clamping surface of the clip; the pusher-clamp assembly is located on a second side of the clamping face of the clamp, the first side being different from the second side.

Preferably, the N clamping surfaces of the N clamps are located on the same plane.

Preferably, the clip box comprises a bottom wall, a first side wall and a second side wall which are oppositely arranged, and the clip box body of the clip accommodated in the clip box is parallel to the bottom wall; the push-clamp assembly is located on the inner side of the bottom wall of the clamp box.

Preferably, the bottom wall of the cassette includes an opening from which the clip feed assembly enters the cassette and is located between the first clip and the second clip.

Preferably, the feeding and clamping assembly comprises an elastic push rod and a feeding and clamping block arranged at one end of the elastic push rod; the rod body component also comprises a base, wherein the base comprises a guide groove extending along the axial direction and a block groove communicated with the guide groove, the block groove comprises a guide inclined plane, and the guide inclined plane is arranged at an angle with the axial direction; the guide groove accommodates the elastic push rod and guides the elastic push rod to move along the axial direction, the block groove accommodates the clamping block, and the guide inclined surface guides the clamping block to enter the opening.

Preferably, the bottom wall includes a first bottom wall located in front of the opening and a second bottom wall located in back of the opening; the base is mounted to the cartridge, and the guide ramp is contiguous with the first bottom wall.

Preferably, the thickness of the clamping block is larger than that of the elastic push rod.

Preferably, the feeding and clamping assembly further comprises a connecting rod extending along the axial direction, one end of the connecting rod is connected with the elastic push rod, and the other end of the connecting rod is connected with the operating assembly.

Preferably, the guide groove further accommodates the link and guides the link to move in the axial direction.

Preferably, the operating assembly further comprises an actuating member and an adapter mechanism; the actuating piece is used for providing power for the clamp feeding assembly and the clamp pushing assembly; the matching and connecting mechanism comprises a first matching and connecting piece, an intermediate piece and a second matching and connecting piece, and the first matching and connecting piece drives the second matching and connecting piece through the intermediate piece; the clamp sending component is linked with the first connecting piece; the push clamp component is linked with the second connecting piece; the direction of movement of the first coupling member is opposite to the direction of movement of the second coupling member.

Compared with the prior art, the clamp applying mechanism has the advantages that the clamp feeding assembly and the clamp pushing assembly are independent parts and are respectively positioned on two sides of at least one clamp, and the first clamp and other clamps are independently pushed from two sides, so that the advancing length of the clamp feeding assembly and the advancing length of the clamp pushing assembly do not need to be equal, the size design of the jaw assembly and the size design of the clamp box can be independent, the design space is provided for independently optimizing the structure of the jaw assembly and the structure of the clamp box, the design space is also provided for optimizing the structure of the clamp pushing assembly and the structure of the clamp feeding assembly, the clamp applying mechanism is simple in structure, and the size is more compact.

Drawings

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

FIG. 2 is a front view of the clip applier shown in FIG. 1 with portions of the housing hidden;

FIG. 3 is a schematic perspective view of the clip applier shown in FIG. 1 with a portion of the housing hidden;

FIG. 4A is a schematic front view of a clip of the clip applier shown in FIG. 1;

FIG. 4B is a side view of the clip applier shown in FIG. 1;

FIG. 5 is an exploded perspective view of a jaw assembly and a shaft assembly of the clip applier shown in FIG. 1;

FIG. 6 is a schematic illustration of the jaw drive mechanism of the clip applier shown in FIG. 1;

FIG. 7 is an exploded perspective view of a portion of the jaw drive mechanism shown in FIG. 6;

FIG. 8 is a schematic structural view of a clip feed drive mechanism of the clip applier shown in FIG. 1;

FIG. 9 is an exploded perspective view of a clip feed drive mechanism of the clip applier shown in FIG. 8;

FIG. 10 is an elevation view of a pusher bar and an adapter block of the pusher-clamp drive mechanism of the clip applier shown in FIG. 1;

FIG. 11 is a schematic perspective view of a pusher-clamp lever of the pusher-clamp drive mechanism of the applier jaw shown in FIG. 10;

figures 12 to 14 are schematic views of the change of state of the transmission mechanism of the clip applier shown in figure 1;

FIG. 15A is a cross-sectional view of the jaw assembly and the shaft assembly at view M-M of FIG. 15B with the wrench of the applier shown in FIG. 1 in an open position;

FIG. 15B is a cross-sectional view of the jaw assembly and the shaft assembly at the L-L perspective of FIG. 15A with the wrench of the applier shown in FIG. 1 in an open position;

FIG. 16A is a cross-sectional view of the jaw assembly and the shaft assembly at view M-M of FIG. 16B with the wrench of the applier shown in FIG. 1 in an intermediate position;

FIG. 16B is a cross-sectional view of the jaw assembly and the shaft assembly at the L-L view of FIG. 16A with the wrench of the applier shown in FIG. 1 in an intermediate position;

FIG. 17A is a cross-sectional view from the perspective of the jaw assembly and the shaft assembly of FIG. 17B when the wrench of the applier shown in FIG. 1 is in a closed position;

FIG. 17B is a cross-sectional view of the jaw assembly and the shaft assembly of the applier shown in FIG. 1 in a closed position of the wrench at view L-L of FIG. 17A;

FIG. 18 is an exploded perspective view from one perspective of a portion of the switching mechanism of the clip applier shown in FIG. 1;

FIG. 19 is an exploded perspective view from another perspective of a portion of the switching mechanism of the clip applier shown in FIG. 1;

FIG. 20 is a schematic illustration of the knob assembly portion drive mechanism of the clip applier shown in FIG. 1;

FIG. 21 is a schematic structural view of an adaptor mechanism of the clip applier shown in FIG. 1;

FIG. 22 is an exploded view of the adapter block of the applicator clamp of FIG. 1 assembling a second adapter;

FIG. 23A is a schematic view of the motion of the feed block of the clip applier shown in FIG. 1;

FIG. 23B is a schematic view of the motion trajectory of the clamping block of the clip applier shown in FIG. 23A;

FIG. 24A is a schematic view of the movement of the pusher-block of the clip applier shown in FIG. 1;

FIG. 24B is a schematic view of the motion trajectory of the pusher-block of the clip applier shown in FIG. 24A;

FIG. 25 is a schematic view of the wrench of the applier jaw shown in FIG. 2;

FIG. 26 is an exploded view of the guide channel of the wrench of the applier jaw shown in FIG. 25;

FIG. 27 is a schematic illustration of the structure of the guide pivot of the clip applier shown in FIG. 2;

FIG. 28 is a schematic view of the assembly of the guide pivot and wrench locking spring member of the applier shown in FIG. 2;

FIG. 29 is a schematic view of the path switch of the clip applier shown in FIG. 2;

FIG. 30 is a schematic view of the internal structure of the housing of the portion of the clip applier shown in FIG. 1;

FIG. 31A is a state view of the wrench locking mechanism of the applier jaw shown in FIG. 2 with the wrench in the open position;

FIG. 31B is a state diagram of the wrench locking mechanism when the wrench of the applier jaw shown in FIG. 2 is moved forward to an intermediate position;

FIG. 31C is a state view of the wrench locking mechanism of the applier jaw shown in FIG. 2 with the wrench in the closed position;

FIG. 31D is a state diagram of the wrench locking mechanism of the applier jaw shown in FIG. 2 with the wrench resetting movement to the neutral position;

FIG. 32 is a cross-sectional view of the clip applier shown in FIG. 1, taken from a perspective relative to the path switch;

FIG. 33A is a state view of the path switch with the wrench of the applier jaw shown in FIG. 1 in an open position;

FIG. 33B is a view of the path switch with the wrench of the applier jaw shown in FIG. 1 moved forward to a first adjacent position;

FIG. 33C is a state view of the path switch with the wrench of the applier jaw shown in FIG. 1 in a closed position;

FIG. 33D is a state view of the path switch with the wrench resetting movement of the applier jaw shown in FIG. 1 to a second adjacent position;

FIG. 34 is a schematic illustration of the jaw assembly of the clip applier shown in FIG. 1;

FIG. 35 is a schematic view of the first or second clamp arm of the jaw assembly shown in FIG. 34;

FIG. 36 is a cross-sectional view of a perspective of the jaw assembly shown in FIG. 34;

FIG. 37 is a schematic view of the stop of the jaw assembly of FIG. 34 engaged with a clip;

FIG. 38 is a schematic structural view of a stop of the jaw assembly shown in FIG. 34;

FIG. 39 is a cross-sectional view from another perspective of the jaw assembly shown in FIG. 34;

FIG. 40 is a cross-sectional view of the jaw assembly shown in FIG. 34 assembled with a cartridge;

FIG. 41 is a schematic view of the jaw assembly shown in FIG. 34 in a closed state;

FIG. 42 is a schematic view of the jaw assembly shown in FIG. 34 in an open condition;

figures 43 to 45 are schematic views illustrating changes in the state of part of the transmission mechanism of the clip applier provided in accordance with the second embodiment of the invention;

FIG. 46 is an exploded perspective view of a portion of the switching mechanism of the clip applier provided in accordance with the third embodiment of the present invention;

FIGS. 47-50 are state change schematic views of a portion of a transmission mechanism of a surgical instrument in accordance with a third embodiment of the present invention;

FIG. 51 is an exploded perspective view of a switching mechanism for a clip applier provided in accordance with a fourth embodiment of the present invention;

fig. 52 to 54 are schematic views illustrating changes in state of a part of a transmission mechanism of a clip applier according to a fourth embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The user of the surgical instrument may be a clinician operating the surgical instrument to perform a procedure during a procedure. The terms "proximal", "posterior" and "distal", "anterior" are used herein with respect to the clinician manipulating the surgical instrument. The terms "proximal" and "posterior" refer to portions that are relatively close to the clinician, and the terms "distal" and "anterior" refer to portions that are relatively far from the clinician. "left" and "right" are referenced to the position of the surgical instrument shown in FIG. 1, e.g., jaw assembly is "left" and sleeve 210 is "right". The terms "upper" and "lower" are used with reference to the relative positions of the upper and lower jaws of the jaw assembly, specifically, the upper jaw is "upper" and the lower jaw is "lower". It will be appreciated that the orientations of "proximal", "rear", "distal", "anterior", "left", "right", "up" and "down" are defined for convenience of description, however, surgical instruments may be used in many orientations and positions and thus these terms are not intended to be limiting and absolute.

In the present invention, unless otherwise explicitly stated or limited, the terms "connected" and the like are to be understood broadly, and for example, may be a fixed connection, a detachable connection, a movable connection, or an integral body; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. It should be noted that, when a definite term is used before "connected" or "connected", it has the meaning defined by the corresponding definite term, only excluding the case where it is obviously necessary to exclude other possible cases, such as "detachably connected" means detachably connected, and does not include fixed connection and integration, but movable connection, direct connection, indirect connection through an intermediate medium are not excluded.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The terms "axial" or "longitudinal" are used herein to refer to the length of the sleeve 210.

Fig. 1-42 illustrate a surgical instrument, specifically a continuous clip applier jaw, of a first embodiment of the invention for applying clips to a body, such as a blood vessel or other tissue other than a blood vessel. In general terms, the clip applier includes a handle member 300, a shaft member 200200 extending from the handle member 300, and a jaw member disposed at one end of the shaft member 200200. To apply multiple clips in succession, the clip applier performs three actions: a clip feeding action, a jaw closing action (a clip applying action) and a clip pushing action, wherein the clip feeding action is necessarily continued to the jaw closing action. The three actions are required to be completed by using the clip applier once. The number of uses of the clip applier depends on the number of clips received therein.

The operating assembly 300 includes a main body 320 and a wrench (actuating member 330) movably mounted on the main body 320, the main body 320 includes a housing 321, the wrench is movably connected to the housing 321, the housing 321 is divided into a substantially spindle-shaped cylindrical head housing 321 and a handle housing 321 extending from a lower side of the head housing 321, the handle housing 321 and the wrench constitute a handle assembly, and a user can hold the handle housing 321 with a single hand and pull the wrench with fingers to move the wrench relative to the main body 320. The clip applier further includes a drive mechanism, portions of which are housed within the housing 321 of the operating assembly 300, and portions of which are located at the shaft assembly 200200.

In order to realize the clamp feeding action, the jaw closing action (clamping action) and the clamp pushing action, the transmission mechanism comprises a clamp feeding driving mechanism, a jaw driving mechanism and a clamp pushing driving mechanism, the wrench drives the transmission mechanism to move so as to drive the clamp feeding driving mechanism, the jaw driving mechanism and the clamp pushing driving mechanism to move, the clamp feeding driving mechanism executes the clamp feeding action, the jaw driving mechanism executes the jaw closing action (clamping action), and the clamp pushing driving mechanism executes the clamp pushing action, wherein the specific details are described in detail below.

As shown in fig. 4A-4B, the clip 10 of the clip applier includes a first clip arm 31, a second clip arm 32, and a connecting portion 33, the connecting portion 33 being located between the first clip arm 31 and the second clip arm 32, and the two clip arms are pivotable relative to each other about the connecting portion 33. The first clip arm 31 includes two first protrusions 41, the second clip arm 32 includes two second protrusions 42, the first clip arm 31 further includes a first engaging portion 35, and the second clip arm 32 further includes a second engaging portion 36. The first arm 31 and the second arm 32 of the clip 10 approach each other under the driving of an external force, and finally the first engaging portion 35 is engaged with the second engaging portion 36 of the second arm, so that the first arm 31 and the second arm 32 are fixed to each other, and the tissue between the first arm 31 and the second arm 32 is clamped, and at this time, the first arm 31 and the second arm 32 are combined. It is defined that the first and

second clip arms

31 and 32 of the clip 10 are in a closed/locked state when they are combined with each other, and the first and

second clip arms

31 and 32 of the clip 10 are in an open state when they are separated from each other. The first engaging portion 35 is a tip portion provided at the distal end of the first clip arm 31, and the second engaging portion 36 is a curved C-shaped hook portion provided at the distal end of the second clip arm 32.

The jaw assembly includes first and

second clamp arms

31, 32 pivotally connected to the shaft assembly 200, respectively, and between which

arms

31, 32 one of the clips 10 may be supported, the jaw assembly being switchable between an open state and a closed state. In the open state, the jaw assembly clamps a clip in the open state, and due to the structural limitation, the jaw assembly cannot be opened without limitation, the open state of the jaw assembly includes an open-to-bottom state in which the distance between the distal end of the first arm 31 and the distal end of the first arm 32 in the up-down direction is the largest, and in the closed state of the jaw assembly, the distance between the distal ends of the first arm 31 and the second arm 32 in the up-down direction is the smallest, and the closing of the jaw assembly causes the clip 10 to be changed from the open state to the closed state. The proximal jaw driver drives the sleeve 210 (distal jaw driver) forward and backward, in a manner described below with respect to the movement of the jaw drive mechanism. The forward movement of sleeve 210 causes the jaw assembly to close, the first and second arms compressing a clip positioned therein, and the rearward movement of sleeve 210 causes the jaw assembly to open.

The shaft assembly 200 includes a cartridge 220, a base 240, a clip feed assembly, a clip pusher assembly, and a sleeve 210 that fits over the cartridge 220, the clip feed assembly, and the clip pusher assembly. The clamp feeding assembly belongs to a clamp feeding driving mechanism, the clamp pushing assembly belongs to a clamp pushing driving mechanism, and the sleeve 210 belongs to a jaw driving mechanism.

A first (distal) end of the clip magazine 220 is coupled to the jaw assembly and a second (proximal) end opposite the first end is fixedly coupled to the body 320. at most M clips can be accommodated within the clip magazine 220, M being 2 or greater, depending on the size of the clip magazine 220. When using a clip applier, the clips in clip magazine 220 are reduced by one. When N clips are accommodated in the clip case 220, N is equal to or less than M, and the N clips are sequentially arranged from the first end to the second end, and are a first clip, a second clip, and an nth clip, respectively. The first clip is fed into the jaw assembly first, closest to the first end. Clips other than the first clip in the clip box 220 are defined as other clips. The clip box 220 includes M stations, which are respectively a first station, a second station and an … … M station, arranged from the far end to the near end of the clip box 220, wherein the first clip is located at the first station at the forefront, and the second clip to the nth clip are arranged at the second station to the nth station in corresponding sequence.

The cartridge 220 has a bottom wall 221, the bottom wall 221 having a plurality of transverse barbs 225 formed along its length, the transverse barbs 225 being equally spaced apart toward the distal end of the cartridge 220 and being inclined inwardly of the cartridge 220, the distal ends of the transverse barbs 225 being inclined tips. As the clip moves axially forward, the clip slidably contacts the forward transverse barb 225 causing it to flex toward the bottom wall 221 to pass smoothly past the transverse barb 225, thereby allowing the clip to pass from the current station to the adjacent front station; the angled ends of the lateral barbs 225 abut against the back side of the clip to inhibit the clip from backing out and thus from entering the adjacent back end station from the current station. It can be seen that the transverse barbs 225 have a one-way locking function to prevent the clip from backing between adjacent stations.

In this embodiment, a first transverse barb 225 and a second transverse barb 225 are arranged between two adjacent stations, the first transverse barb 225 seizes one first projection 41 behind the clip at the moment, and the second transverse barb 225 seizes the second projection 42 on the same side of the same clip behind the clip to prevent the clip from entering the adjacent rear end station from the current station in the clip magazine 220. In this embodiment there are a plurality of first transverse barbs 225 and a plurality of second transverse barbs 225 arranged in two rows on either side of the width of the bottom wall 221, with adjacent transverse barbs 225 in each row being axially equidistant.

In this embodiment, the clip box 220, the pinch grip assembly, and the pinch grip assembly at the shaft assembly 200200 form a special three-layer design, as described in more detail below.

When the clamp is in an open state, a clamping surface is formed between the first clamping arm and the second clamping arm. The clip feeding assembly is used for abutting and pushing the first clip to move forwards so as to enter the jaw assembly; the push-clamp assembly is used for abutting and pushing the second clamp to the Nth clamp to move forwards; the jaw assembly is adapted to receive a clip (first clip) from the clip magazine 220 and perform a closing action to compress the clip into a closed condition. The clip feeding assembly is located on a first side of the clamping surface of the clip, and the clip pushing assembly is located on a second side of the clamping surface of the clip, wherein the first side is different from the second side. The clamp feeding assembly and the clamp pushing assembly are independent parts and are respectively positioned on two sides of at least one clamp, and the first clamp or other clamps are independently pushed from two sides, so that the advancing length of the clamp feeding assembly and the advancing length of the clamp pushing assembly do not need to be equal, the size design of the jaw assembly and the size design of the clamp box 220 can be mutually independent, a design space is provided for independently optimizing the structure of the jaw assembly and the structure of the clamp box 220, a design space is also provided for optimizing the structures of the clamp pushing assembly and the clamp feeding assembly, the clamp applying structure is simple, and the size is more compact.

In the prior art, an integral pushing piece is adopted, a clamping delivering piece and a clamping pushing piece are required to be in a sheet shape, otherwise the clamping delivering piece and the clamping pushing piece collide with a clip to interfere when retreating, but the sheet structure is not rigid enough and is easy to bend, so that the clamping delivering piece and the clamping pushing piece are unstable and are integrally formed, and the requirement on a production process is high; the size of the jaw assembly is designed to meet the advancing length of the clamp feeding, the distance between two adjacent clamps in the clamp box 220 is equal to the advancing length of the push clamp, the push piece synchronously executing the push clamp and the clamp feeding is equal to the advancing length of the push clamp, so that the size design of the jaw assembly and the size design of the clamp box 220 must be matched with each other, the size of the clamp applying tool is not compact, the design is complex, for example, the distance between the adjacent clamps in the clamp box 220 cannot be too small, otherwise, the size of the jaw assembly is too small to stably clamp the first clamp, the size of the jaw assembly cannot be too large, otherwise, the size of the clamp box 220 is large due to the large distance between the adjacent clamps in the clamp box 220, and the whole size of the clamp applying tool is large. In the split manner of the clip feeding assembly and the clip pushing assembly of the embodiment, the distance between the clips in the clip box 220 can be designed to be small enough, the advancing length of the clip pushing assembly does not need to be considered, the movable channel of the clip of the jaw assembly can be designed to be long enough to meet the requirements of stable guiding, clipping and compressing of the clip, and the limitation of the distance between the clips is not needed; in addition, the clip feeding assembly and the clip pushing assembly can be independently designed to be rigid enough to solve the problem that the clip cannot be stably pushed in the prior art.

The first clamping arm and the second clamping arm are respectively provided with a central line, the clamp comprises a first side surface and a second side surface which are parallel, and the first side surface and the second side surface in the opening state are both C-shaped due to the fact that the clamp is approximately C-shaped in the opening state. In a certain mode, the clamping surface is a surface formed by two center lines of the first clamping arm and the second clamping arm, and two sides of the surface are the first side and the second side of the clamping surface on which the feeding clamping assembly and the pushing clamping assembly are respectively arranged. In another certain mode, a first clamping surface is formed on the first side surface of the C-shaped part, a second clamping surface is formed on the second side surface of the C-shaped part, an inner side is formed between the first clamping surface and the second clamping surface, and two outer sides of the first clamping surface and the second clamping surface are the first side and the second side of the clamping surfaces on which the feeding clamp assembly and the pushing clamp assembly are respectively arranged.

In this embodiment, when the clip is installed in the clip box 220, the two clip arms of the clip are respectively pressed against by the first side wall 222 and the second side wall 223 and are compressed, but are not compressed to the closed state, the clip plane is parallel to the bottom wall 221, and the clipping planes of the clips are on the same plane. In other embodiments, the plurality of clips may be arranged at an angle in the clip magazine 220, the gripping surfaces of the plurality of clips are not in the same plane, but the gripping surfaces of the plurality of clips are parallel to each other, and the advancing clip assembly and the pushing clip assembly are still arranged on a first side and a second side of each gripping surface relative to the gripping surface.

The cartridge 220 includes a bottom wall 221 extending lengthwise and first and second opposing

sidewalls

222 and 223 to form a generally C-shaped structure. When the clip box 220 contains the clip, the clipping plane of the clip is parallel to the bottom wall 221; the clip feeding assembly is located outside the bottom wall 221 of the clip box 220 and the clip pushing assembly is located inside the bottom wall 221 of the clip box 220. Therefore, the clamp feeding assembly and the clamp pushing assembly respectively push the first clamp and other clamps from two sides of the clamp box 220, the space in the sleeve 210 and at two sides of the clamp box 220 is fully utilized, the design freedom of the clamp pushing assembly and the clamp feeding assembly is improved, and the clamp applying structure is more stable and compact. The inner and outer sides of the bottom wall 221 refer to the sides of the plane in which the bottom wall 221 lies, and the clip, the first side wall 222 and the second side wall 223 are located on the inner side of the bottom wall 221.

An opening is formed in the bottom wall 221 of the cartridge 220, the opening being located near the distal end of the bottom wall 221, and the clip feed assembly enters the cartridge 220 through the opening and is positioned between the first clip and the second clip. The opening ensures that the clip feed assembly can smoothly enter and exit the clip magazine 220 and enter between the first clip and the second clip, thereby abutting the first clip at its rear end to urge it forward. Preferably, one part of the opening is located at the first station and the other part is located at the second station.

The feeding and clamping assembly comprises an elastic push rod 232 and a feeding and clamping block 231 connected to one end of the elastic push rod 232, and the feeding and clamping block 231 is used for abutting and pushing the first clamp; the base 240 is provided with a channel for accommodating the feeding and clamping assembly and providing axial movement for the feeding and clamping assembly, the channel comprises a guide groove 241 extending axially and a block groove 242 communicated with the guide groove 241, the block groove 242 comprises a guide inclined surface 498243, and the guide inclined surface 498243 is arranged at an angle with the axial direction. Specifically, when the base 240 and the clip case 220 are assembled together, the guiding slope 498243 is inclined toward the distal end and toward the clip case 220, and the elastic pushing rod 232 is formed by laminating a plurality of metal sheets, has elasticity, and can be bent. At the initial moment, the feeding clamping block 231 is parallel to the elastic push rod 232 along the axial direction, the guide groove 241 accommodates the elastic push rod 232, the block groove 242 accommodates the feeding clamping block 231, the guide groove 241 guides the elastic push rod 232 to move along the axial direction, and the guide inclined surface 498243 guides the feeding clamping block 231 to enter the opening. Specifically, when the elastic pushing rod 232 moves forward along the guiding groove 241 axially, the front clamping block 231 abuts against the guiding inclined surface 498243, the elastic pushing rod 232 starts to bend, the clamping block 231 enters the opening of the clamping box 220 obliquely along the guiding inclined surface 498243, so as to abut against the first clip at the rear end of the first clip to push the first clip to advance, and then the elastic pushing rod 232 moves backward along the guiding groove 241 axially to drive the clamping block 231 to retract from the opening to the block groove 242 along the guiding inclined surface 498243. The base 240 has high rigidity, the channel of the base accommodates the clip feeding assembly, stable and reliable arrangement of the clip feeding assembly in the clip applier at the initial moment is guaranteed, meanwhile, the guide groove 241 provides a fixed channel for the elastic push rod 232, movement space of the elastic push rod 232 is limited, and excessive bending and even bending of the elastic push rod 232 during movement are avoided, and the elastic push rod 232 is blocked in the sleeve 210 to affect clip feeding function. The rigid guide ramps 498243 provide stability to the movement of the clamping blocks 231 relative to prior art inclined clamping blades. The bottom wall 221 of the cartridge 220 further includes a first bottom wall 221a at the front end of the opening and a second bottom wall 221b at the rear end of the opening; when the base 240 is mounted to the cassette 220, the guide slope 498 meets the first bottom wall 221 a. The guiding slope 498 and the first bottom wall 221a are directly connected without any gap, so that the clamping block 231 can smoothly enter the opening without being blocked and cannot be accidentally clamped. The thickness of the clamping block 231 is larger than that of the elastic push rod 232. The elastic push rod 232 is formed in a thin and elastic structure, and is ensured to be bent along the guide slope 498243, so that the clip block 231 can move along the guide slope 498243. The thickness of the feeding and clamping block 231 is large, the strength of the feeding and clamping block 231 is large, deformation is not easy to occur, and due to the large thickness, the feeding and clamping block 231 forms a first abutting surface 486 contacting with the clip at the far end, and the first abutting surface 486 has a large area, so that the first clip can be stably pushed. Preferably, the clamping block 231 and the elastic push rod 232 are independent parts, and can be selectively welded and fixed.

The feeding and clamping assembly further comprises a feeding and clamping rod 233 extending axially, one end of the feeding and clamping rod 233 is connected with the elastic push rod 232, the other end of the feeding and clamping rod 233 is connected with the operating assembly 300, and the guide groove 241 accommodates the feeding and clamping rod 233. The operating assembly 300 drives the feeding rod 233 to move axially, so that the feeding rod 233 drives the elastic pushing rod 232 and the feeding block 231 to move together. Send clamping bar 233 to be similar structures such as cylinder pole or square pole, be different from elastic push rod 232, send clamping bar 233's rigidity strong, difficult emergence deformation has avoided elastic push rod 232 to buckle easily in guide way 241 when axial motion and cause and send the clamp subassembly to block, has improved the stability of sending the motion of clamp subassembly.

The guide groove 241 of the base 240 also receives the feeding bar 233 and guides the feeding bar 233 to move in the axial direction. The feeding and clamping rod 233 moves axially along the path planned by the guide groove 241 of the base 240, which enhances the stability of the axial movement of the feeding and clamping rod 233. The pinch-grip assembly is a pinch-grip holder 250, the pinch-grip holder 250 comprises a pinch-grip block 253, an elastic member 254 and a pinch-grip rod 251, the pinch-grip rod 251 is provided with a side cavity 252, the side cavity 252 or the pinch-grip block 253 is provided with a rotating shaft 255, and the pinch-grip block 253 is rotatably installed in the side cavity 252 through the rotating shaft 255. The pushing and clamping block 253 includes an abutting end which can abut against and push the clip to advance, the abutting end is arranged at the far end of the pushing and clamping block 253, one end of an elastic member 254 is connected with the pushing and clamping block 253, the other end of the elastic member is connected with the pushing and clamping rod 251, and the elastic member 254 provides a force for the pushing and clamping block 253 to rotate towards the outer side of the side cavity 252, in particular to enable the abutting end of the pushing and clamping block 253 to incline towards the clip. In this embodiment, corresponding to the plurality of stations, a plurality of side cavities 252 are arranged on the clamp pushing rod 251 at intervals, each side cavity 252 is provided with an elastic member 254 and a clamp pushing block 253, when the clamp pushing assembly moves forward along the axial direction, the abutting ends of the plurality of clamp pushing blocks 253 abut against and push a clamp to move forward respectively, when the clamp pushing assembly moves backward along the axial direction, the clamp pushing blocks 253 are pressed by the clamp to rotate towards the side cavities 252, the clamp is avoided, and the clamp is prevented from moving backward when the clamp pushing blocks 253 moves backward with the clamp. The push-clamping block 253 has a certain thickness, so that the abutting end of the push-clamping block 253 is a second abutting surface 486 with a certain area, and the stability of abutting with the clamp is ensured. The abutting end can also be provided with a concave part, and the clamping arm of the clamp is just clamped into the concave part, so that the abutting stability is further enhanced. The push-clamp assembly is the push-clamp distal drive member of the present invention.

The first side wall 222 and the second side wall 223 of the clamping box 220 are respectively provided with a first clamping strip and a second clamping strip, which protrude outwards, and the upper and lower surfaces of the push-clamping rod 251 of the push-clamping seat 250 are respectively provided with a first clamping groove and a second clamping groove which are matched with the first clamping strip and the second clamping strip, so that the push-clamping seat 250 can be slidably installed in the clamping box 220.

Further, the operating assembly 300 further includes a coupling mechanism, the actuating member 330 is used for providing power for the feeding clamp assembly and the pushing clamp assembly, the coupling mechanism includes a first coupling member, an intermediate member and a second coupling member, the first coupling member drives the second coupling member through the intermediate member, the feeding clamp assembly is linked with the first coupling member, the pushing clamp assembly is linked with the second coupling member, and the moving direction of the first coupling member is opposite to the moving direction of the second coupling member. The structure and movement process of the mating mechanism and the linkage manner of the mating mechanism with the clip feeding assembly and the clip pushing assembly are described in detail below, and the advantages are as shown in the following, and are not described again.

In this embodiment, the transmission mechanism includes a clip feeding driving mechanism and a jaw driving mechanism, the clip feeding driving mechanism is used for driving the clip to enter the jaw assembly, and the jaw driving mechanism is used for driving the jaw assembly to move. The transmission mechanism also comprises a switching mechanism which is used for selectively driving the clamp feeding driving mechanism or the jaw driving mechanism; the transmission mechanism comprises a first state and a second state, and in the first state, the switching mechanism is separated from the jaw driving mechanism and is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move; and in the second state, the switching mechanism is separated from the clamp feeding driving mechanism and is combined with the jaw driving mechanism to drive the jaw driving mechanism to move. In this embodiment, when the switching mechanism drives the clip feeding driving mechanism to move, the jaw driving mechanism is not driven to be in a static state, after the switching mechanism is separated from the clip feeding driving mechanism, the clip feeding driving mechanism does not advance any more, the switching mechanism is combined with the jaw driving mechanism to drive the jaw driving mechanism to move, and in the process, energy is alternatively transmitted to the clip feeding driving mechanism or the jaw driving mechanism, so that energy consumption is low, the force required by a doctor to operate the actuating piece 330 is correspondingly reduced, the operation is more comfortable, the clip applier is better operated, and the product experience is improved. In addition, the movement of the clamp feeding driving mechanism and the movement of the jaw driving mechanism are independent and carried out in a time-sharing mode, and other problems caused by linkage of the clamp feeding driving mechanism and the jaw driving mechanism, such as complex structure, complex movement relation and the like, can also be prevented.

The switching mechanism comprises a first clutch mechanism and a second clutch mechanism, the first clutch mechanism is connected with the second clutch mechanism, and when the switching mechanism moves under the action of the actuating piece 330, the first clutch mechanism and the second clutch mechanism move together; in a first state, the first clutch mechanism is combined with the clamp feeding driving mechanism to drive the clamp feeding driving mechanism to move, and the second clutch mechanism is separated from the jaw driving mechanism; and in the second state, the first clutch mechanism is separated from the clamp feeding driving mechanism, and the second clutch mechanism is combined with the jaw driving mechanism to drive the jaw driving mechanism to move. Specifically, the first clutch mechanism comprises a first clutch piece and a clutch switching mechanism; the first clutch piece is connected with the clutch switching mechanism; when the clutch piece is in the first state, the first clutch piece is combined with the clamp conveying driving mechanism; in the second state, the first clutch piece is separated from the clamp feeding driving mechanism. The second clutch mechanism includes a second clutch member connected to the first clutch mechanism, and in order to make the structure of the switching mechanism simpler and more compact, the second clutch member is a distal end portion of the first clutch mechanism, specifically, the distal end portion of the first clutch member. In one embodiment, the distal end of the first clutch mechanism is its distal face 508; in the first state, the distal face 508 of the first clutch mechanism is disengaged from the proximal face 502 of the jaw drive mechanism, and in the second state, the distal face 508 of the first clutch mechanism is engaged with the proximal face 502 of the jaw drive mechanism. In another embodiment, the distal end of the first clutch mechanism is a hook portion protruding from the distal end thereof, the proximal end of the jaw driving mechanism is provided with a groove 314 configured to fit with the hook portion, the hook portion is not inserted into the groove 314 of the jaw driving mechanism in the first state, and the hook portion is inserted into the groove 314 of the jaw driving mechanism to push the jaw driving mechanism to move in the second state.

The clutch switching mechanism comprises a moving piece and a moving guide piece, and the moving piece is connected with the first clutch piece; when the moving piece is guided by the moving guide piece to move from the first position to the second position, the first clutch piece and the clamp feeding driving mechanism are switched from the combining state to the separating state. Specifically, the moving member is a guide post 490 connected to the first clutch member, the moving guide member is a guide rail provided in the housing 321, and the guide post 490 can move on the guide rail. The head housing 321 of the clip applier includes a first head housing 321 and a second head housing 321, the first head housing 321 and the second head housing 321 are axially symmetrically disposed, and the guide rail is alternatively disposed on an inner wall of the first head housing 321 or an inner wall of the second head housing 321. In order to make the movement of the guide post 490 on the guide rails smoother, the guide rails are symmetrically disposed on the inner walls of the first and

second head housings

321 and 321. The guide rail includes a first guide surface 494, a second guide surface 496 higher than the first guide surface 494; the guide post 490 is positioned on the first guide surface 494 in the first position and on the second guide surface 496 in the second position. The first guide surface 494 is smoothly connected to the second guide surface 496 by the slope 498 so that the movement of the moving member is smoother. The guide column 490 can move on the guide rail following the movement of the first clutch piece, when the guide column 490 moves on the first guide surface 494, the first clutch piece is kept in a combined state with the clip feeding driving mechanism, since the guide rails provided in the housing 321 have different heights, when the moving piece moves onto the second guide surface 496 of the guide rail, the first clutch piece is driven to move upwards to be separated from the clip feeding driving mechanism, and when the first clutch piece is separated from the clip feeding driving mechanism, the distal end portion of the first clutch mechanism is combined with the proximal end portion 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, additional devices are not needed, the internal space of the shell 321 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 switching mechanism has a switching mechanism body 320, and a portion of the first clutch mechanism is accommodated in the body 320 in order to make the overall structure of the switching mechanism more compact, fully utilize the space inside the clip applier, and make the movement of the switching mechanism more smooth. Specifically, the body 320 includes a proximal end face 502, a distal end face 508, a first through hole 404510 passing through the proximal end face 502 and the distal end face 508, and a second through hole 404512 passing through the upper end face of the switching mechanism and the upper arc face of the first through hole 404510; the first through hole 404510 is used for the clamp feeding driving mechanism to pass through; a second through hole 404512 for receiving the first clutch member. The second clutch is the distal end portion of the switching mechanism body 320, which can be the distal end surface 508 as described above. When the jaw is in the first state, the distal end of the switching mechanism and the proximal end of the jaw driving mechanism are arranged at intervals; in the second state, the distal end of the switching mechanism is mated with the proximal end of the jaw drive mechanism. The first clutch piece comprises a clamping block 482 which is accommodated in the second through hole 404512, the clamp feeding driving mechanism comprises a clamping groove, and the clamping block 482 is matched with the clamping groove to combine the first clutch piece with the clamp feeding driving mechanism. The latch 482 includes a first end and a second end extending from the first end in a direction perpendicular to the longitudinal direction; the first end is connected with the guide post 490, and the second end is detachably connected with the clamping groove; the first clutch further comprises an elastic element, such as a spring, and when the first clutch is in the first state, the elastic element applies a downward force to the clamping block 482 to enable the clamping block 482 to be abutted against the clamping groove, so that the first clutch can be well combined with the clamp feeding driving mechanism, and the stability of clamp feeding action is improved. In this embodiment, in order to make the overall structure simpler and more compact, the slot is the annular groove 438 disposed on the outer peripheral surface of the proximal end of the clip feeding driving mechanism, the second end of the clip 482 includes an arc surface 484 matched with the bottom surface of the annular groove 438 and an abutting surface 486 connected with the arc surface 484, the abutting surface 486 abuts against the end surface of the annular groove 438, and the clip feeding driving mechanism can be better pushed by the clip 482 through the matching of the arc surface 484 with the bottom surface of the annular groove 438 and the matching of the abutting surface 486 with the end surface of the annular groove 438. Of course, in other embodiments, the first clutch member may include a recess 314 and the clip driver member may include a projection 440 configured therewith.

In this embodiment, the switching mechanism is sleeved on the clip feeding driving mechanism, and in the first state, the switching mechanism and the jaw driving mechanism are arranged at an interval, and the clip feeding driving mechanism is pushed to advance under the action of external force, and the proximal end surface 502 of the clip feeding driving mechanism and the proximal end surface 502 of the jaw driving mechanism gradually approach each other; in the second state, the switching mechanism is separated from the clip feeding driving mechanism, and is coupled to the jaw driving mechanism to drive the jaw driving mechanism to advance, and the proximal end surface 502 of the jaw driving mechanism and the proximal end surface 502 of the clip feeding driving mechanism are gradually separated. In order to ensure that the overall layout of the transmission mechanism is more reasonable and the structure is more compact and increase the contact area between the switching mechanism and the jaw driving mechanism so as to ensure that the driving is more stable, the jaw driving mechanism is sleeved on the clamp feeding driving mechanism, namely the clamp feeding driving mechanism is partially positioned in the jaw driving mechanism and can pass through the jaw driving mechanism; the feeding and clamping driving mechanism and the jaw driving mechanism move along the longitudinal direction under the action of the switching mechanism, the projection of the feeding and clamping driving mechanism on a plane perpendicular to the longitudinal direction is positioned inside the projection of the jaw driving mechanism on the plane, and the projection of the jaw driving mechanism on the plane is positioned inside the projection of the switching mechanism on the plane.

The actuating piece 330 is used for providing power for the transmission mechanism, specifically, the actuating piece 330 is abutted against the switching mechanism so as to drive the switching mechanism to move, and the switching mechanism alternatively transmits the power to the clamp feeding driving mechanism or the jaw driving mechanism; the proximal end of the switching mechanism has a drive surface 504 and a stop 506, wherein the drive surface 504 abuts the actuator 330 to receive the power and the stop 506 is used to limit the actuator 330. The driving surface 504 is a recessed surface formed by the stopper 506 and the switching mechanism surface, and the head of the actuator 330 abuts against the recessed surface. In order to make the force applied to the switching mechanism by the actuating member 330 more uniform and to make the switching mechanism advance smoothly, the stopping portions 506 are symmetrically disposed on both sides of the proximal end of the switching mechanism in the advancing direction thereof, and accordingly the actuating member 330 has a grip portion and symmetrically disposed push pawls extending from the grip portion into the housing 321, and both the push pawls abut against the driving surfaces 504 on both sides of the switching mechanism, respectively. The stopping portions 506 are convexly arranged on the outer surface of the switching mechanism and extend along the longitudinal direction, guide grooves matched with the stopping portions 506 are symmetrically arranged on the inner walls of the first head shell 321 and the second head shell 321 of the clip applier, the stopping portions 506 can move in the guide grooves along the longitudinal direction, and the guide grooves can limit the height direction of the stopping portions 506, so that the shaking of the switching mechanism in the movement can be effectively reduced, and the transmission is more stable and reliable.

The clip applier further includes a clip feed backstop mechanism including a biasing spring and a guide pivot 350, the guide pivot 350 being a guide pivot 350 described below including a backstop end 354. The guide pivot 350 includes a pivoting end 352 pivotally connected to the housing 321, and a guide 351 and a backstop end 354 extending outwardly from the pivoting end 352; the guide 351 is movably connected with the actuator 330, and the movement of the actuator 330 drives the guide 351 and the stopping end 354 to move around the pivoting end 334 under the action of the biasing spring; in the first state, the backstop end 354 is gradually closer to the proximal end of the clip feed drive mechanism; in the second state, the retaining end 354 abuts against the proximal end of the clip feeding drive mechanism to prevent the clip feeding drive mechanism from backing up.

The clip-feeding retaining mechanism can move the retaining end 354 to the proximal end of the clip-feeding driving mechanism and abut against the clip-feeding driving mechanism to prevent the clip-feeding driving mechanism from backing up at the moment when the switching mechanism is separated from the clip-feeding driving mechanism. However, in order to prevent the clip retreating caused by the clip feeding stopping mechanism failing to abut against the clip feeding driving mechanism due to the dimensional deviation and movement error of the components, the clip feeding stopping mechanism may have its retreating stopping end 354 moved to the proximal end of the clip feeding driving mechanism before the switching mechanism is separated from the clip feeding driving mechanism, and after the switching mechanism is separated from the clip feeding driving mechanism, the clip feeding driving mechanism retreats by a small distance under the action of the first resetting member 418 until it abuts against the retreating stopping end 354 of the clip feeding stopping mechanism, thereby preventing the clip feeding driving mechanism from retreating further and causing the clip to retreat. Because the elastic push rod 232 of the clip feeding driving mechanism has elasticity and is compressed when the clip feeding driving mechanism moves forward, the elastic push rod 232 gradually recovers deformation when the clip feeding driving mechanism retreats for a short distance under the action of the first resetting piece 418, at the moment, the clip feeding block 231 still supports against the clip, and the clip does not retreat when the clip feeding driving mechanism retreats for a short distance.

The actuator 330 has a guide channel 340, the guide channel 340 includes a starting point a, an end point, and a locking point b between the starting point a and the end point; the distance from the starting point a to the pivot center of the actuating member 330 and the distance from the ending point to the pivot center of the actuating member 330 are both less than the distance from the locking point b to the pivot center of the actuating member 330; when the actuating member 330 rotates around the pivot center thereof, the guide channel 340 rotates therewith, so that the guide channel 340 and the guide member 351 move relatively, and the guide member 351 can sequentially pass through the starting point a, the locking point b and the end point along with the movement of the actuating member 330; in the first state, the guiding element 351 gradually moves relatively towards the locking point b, and the stopping end 354 gradually approaches the proximal end of the clip feeding driving mechanism; in the second state, when the guide 351 moves relatively to the locking point b, the retaining end 354 abuts against the proximal end of the clip feeding driving mechanism to prevent the clip feeding driving mechanism from backing up. The clamp feeding and stopping mechanism can avoid the problem that the clamp in the jaw assembly cannot clamp blood vessels or tissues due to the fact that the clamp retreats, and therefore reliability and safety of an operation are improved. More detailed description of the actuator 330 will be provided later herein.

The jaw driving mechanism comprises a jaw proximal end driving piece and a jaw distal end driving piece connected with the jaw proximal end driving piece, and when the switching mechanism is in the second state, the jaw proximal end driving piece is driven to move, and then the jaw distal end driving piece is driven to move. In this embodiment, the proximal jaw driver is a jaw drive tube 432 and the distal jaw driver is a cannula 210. One end of the sleeve 210 is connected with the jaw driving tube 432, and the other end is matched with the jaw assembly; in the second state, the switching mechanism is coupled to the jaw drive tube 432 to drive the movement of the jaw drive tube 432, which in turn drives the movement of the sleeve 210 to drive the closure of the jaw assembly. Ribs 436 are provided at intervals on the inner wall of the distal end of the jaw drive tube 432, annular grooves 438 are formed on the adjacent ribs 436 and the inner wall of the jaw drive tube 432, annular pieces 442 are provided on the outer periphery of the proximal end of the sleeve 210, the annular pieces 442 are fitted into the annular grooves 438, and the ribs 436 abut against the annular pieces 442. Notches 444 are symmetrically circumferentially disposed on annular tab 442, and a protrusion 440 is disposed within annular groove 438 and configured to engage with notches 444 such that sleeve 210 is received in place and secured within jaw drive tube 432. The jaw drive mechanism further includes a second restoring member 446, such as a resilient member. The elastic element is sleeved outside the jaw driving pipe 432, one end of the elastic element is abutted with a baffle 434 on the outer surface of the jaw driving pipe 432, the other end of the elastic element extends forwards and is abutted with the inner wall of the shell 321 of the clip applier, the elastic element is used for storing energy when the jaw driving mechanism advances, and the elastic element recovers deformation and releases the energy so as to provide power for the resetting and the retreating of the jaw driving mechanism.

The clip conveying driving mechanism comprises a clip conveying near-end driving piece and a clip conveying far-end driving piece connected with the clip conveying near-end driving piece; when the switching mechanism is in the first state, the near-end driving piece of the feeding clamp is driven to move, and then the far-end driving piece of the feeding clamp is driven to move. The clamp feeding far-end driving piece comprises a base 240 and a clamp feeding assembly, and a channel is arranged in the base 240; in the first state, the switching mechanism is coupled to the proximal clip feed drive member to drive the proximal clip feed drive member to move, thereby driving the clip feed assembly to move within the channel to drive the clip into the jaw assembly. More specifically, the distal end of the channel is provided with a guide ramp 498243, and the proximal clip drive drives the clip feed assembly to move within the channel and past guide ramp 498243 to move into abutment with the first clip in clip magazine 220, thereby driving the first clip into the jaw assembly. In this embodiment, the clip delivery proximal drive member is a clip delivery drive tube 402 that is fixedly coupled to the clip delivery assembly, and the clip delivery drive tube 402 is partially disposed within the jaw drive tube 432 and is capable of moving within the jaw drive tube 432. The base 240 is positioned outside the clip magazine 220 and has a first end fixedly attached to the housing 321 and positioned within the clip feed drive tube 402 and a second end extending distally from the first end and fixedly attached to the outer tab of the clip magazine 220 by the pin 316. The feeding and clamping assembly comprises a feeding and clamping rod 233, an elastic push rod 232 and a feeding and clamping block 231 which are sequentially connected, specifically, a bending part 406 is arranged at the proximal end of the feeding and clamping rod 233, a hole 404 matched with the distal end of the feeding and clamping driving tube 402 in shape is arranged at the distal end of the feeding and clamping driving tube 402 and is used for accommodating the bending part 406 of the feeding and clamping rod 233, and the bending part 406 at the proximal end of the feeding and clamping rod 233 penetrates through the proximal end of the channel of the base 240 and is arranged in the hole 404 matched with the distal end of the feeding and clamping driving tube 402 in shape. The distal end of the clamping rod 233 is provided with a containing groove 408, the proximal end of the elastic push rod 232 is provided with a clamping part 410 matched with the containing groove 408 in a shape, and the clamping part 410 is inserted into the containing groove 408 to realize the connection of the elastic push rod 232 and the clamping rod 233; the distal end of the elastic push rod 232 is provided with an arc-shaped recess 412, and the lug 414 at the proximal end of the feeding clamp block 231 is matched with the arc-shaped recess 412, so that the connection between the elastic push rod 232 and the feeding clamp head is realized. The channel of the base 240 provides space for receiving the feed nip assembly on the one hand, and also facilitates movement of the feed nip assembly within the channel on the other hand. The feed clamp drive tube 402 drives the feed clamp block 231 within the channel and past the guide ramp 498243 to move into abutment with the clip, thereby driving the clip into the jaw assembly. In order to enhance the strength of the elastic push rod 232 and improve the clip feeding stability, two or more elastic push rods 232 are provided, and each elastic push rod 232 is formed by overlapping a plurality of pieces. The elastic push rod 232 has elasticity and can be deformed and bent, so that the clip conveying block 231 can convey the clip into place. For the corresponding structures of the clip feeding block 231, the clips and the clip box 220, refer to the above detailed description, and are not repeated herein. The clip feed drive mechanism also includes a first reset member 418, such as an elastomeric member. One end of the elastic element is abutted with a convex rib 436 on the inner wall of the jaw driving tube 432 close to the feeding clamp driving tube 402, the other end extends backwards and is abutted with the distal end surface 508 of the feeding clamp driving tube 402, the elastic element is used for storing energy when the feeding clamp driving mechanism advances, and the elastic element recovers deformation and releases the energy so as to provide power for resetting of the feeding clamp driving mechanism.

Clip applier further includes a knob 310, wherein knob 310 has a protrusion 312 at a proximal end thereof, and a recess is disposed in a distal end of operating assembly 300 to mate with protrusion 312, and recess and protrusion 312 cooperate to allow knob 310 to be assembled with operating assembly 300. A pin 316 is provided in the knob 310, a first kidney-shaped aperture 420 is provided in the feed clamp drive tube 402, and a second kidney-shaped aperture 404448 is provided in the jaw drive tube 432. The proximal end of the base 240 is received within the feed collet drive tube 402 and is provided with a first pin hole 416404, a pin 316, and a first pin hole 416404 that cooperate to fixedly secure the base 240 to the knob 310. The proximal end of the clip cartridge 220 is also received within the clip feed drive tube 402 and is provided with a second pin hole 404, the pin 316 and the second pin hole 404 cooperating such that the clip cartridge 220 is also fixedly secured to the knob 310. One end of the pin 316 is mounted at a first position of the side wall of the knob 310, and the other end passes through the second kidney-shaped hole 404448, the first pin hole 416404, the second pin hole 404, and the first kidney-shaped hole 420 and then is mounted at another position of the side wall of the knob 310 which is symmetrical to the first position, so that when the knob 310 rotates, the jaw driving tube 432, the clip feeding driving tube 402, the base 240, and the clip box 220 can be driven to rotate together, and further the sleeve 210, the jaw assembly, and the clip feeding assembly can be driven to rotate together, so that a doctor can clamp a blood vessel or tissue after adjusting to a proper angle. In addition, due to the existence of the first waist-shaped hole 420 and the second waist-shaped hole 404448, the advance of the clamp feeding driving pipe 402 and the jaw driving pipe 432 is not influenced by the pin 316. Knob 310 drives and send and press from both sides actuating mechanism, it can do 360 degrees rotations to keep silent actuating mechanism, in order to increase the doctor and rotate the feeling of knob 310, make simultaneously to rotate behind the arbitrary angle homoenergetic and stop at current position, so that the doctor operates, set up damping piece 318 in knob 310 and handle assembly's junction, more specifically, periphery at the bulge 312 of knob 310 near-end sets up recess 314, the inboard holding of damping piece 318 is in this recess 314, outside and handle assembly's depressed part butt. The force for rotating the knob 310 is increased by the friction force between the damping member 318 and the handle assembly, and the knob can stop at the current position after the rotation is stopped at any angle, and the damping member 318 is a rubber ring.

The working process of the clip applier of the embodiment for realizing clip feeding and closing of the jaw components is described in detail as follows:

the operator presses the actuator 330 to move the actuator 330 from the open position toward the intermediate position to push the switching mechanism to advance the clip feed drive mechanism, and the proximal end of the clip feed drive tube 402 and the distal end of the switching mechanism are gradually moved toward the proximal end of the jaw drive tube 432; when the actuator 330 moves to the intermediate position, the moving member of the switching mechanism moves to the second guide surface 496 in the housing 321, the locking block 482 disengages from the locking groove of the clip feeding driving tube 402, the switching mechanism is separated from the clip feeding driving mechanism, the forward stroke of the clip feeding driving mechanism is completed, the clip located at the farthest end of the clip magazine 220 is fed into the jaw assembly (the clip feeding operation is completed), and the distal end surface 508 of the switching mechanism abuts against the proximal end surface 502 of the jaw driving mechanism. The retaining end 354 of the clip feed retaining mechanism is capable of abutting the clip feed drive tube 402 after the switching mechanism is separated from the clip feed drive mechanism to prevent the clip in the jaw assembly from backing up due to the backing up of the clip feed drive mechanism. Continuing to depress actuator 330, actuator 330 moves from the intermediate position toward the closed position, and the feed nip stop mechanism progressively disengages feed nip drive tube 402; the switching mechanism advances the jaw drive mechanism by the actuator 330, and the jaw drive tube 432 drives the sleeve 210 to advance to close the jaw assembly, until the actuator 330 is moved to the closed position, the forward stroke of the jaw drive mechanism is completed (the jaw closing operation is completed), the clip feeding/stopping mechanism is completely separated from the clip feeding drive tube 402, and the clip feeding drive tube 402 is reset by the first reset member 418. The actuator 330 is released and the jaw drive mechanism is reset by the second reset member 446. When the actuating member 330 moves from the open position to the intermediate position, the guiding member 351 of the clip feeding retaining mechanism relatively moves to the locking point b in the guiding channel 340 of the actuating member 330, and the actuating member 330 is locked in one direction, that is, the actuating member 330 can only move towards the closed position but not towards the open position under the action of external force, so that the doctor can clearly know that the clip feeding action is completed on one hand, and can stop to find blood vessels or tissues and continue to operate the actuating member 330 to perform the jaw closing action without pressing the actuating member 330 all the time after the clip feeding action is completed by operating the clip applier on the other hand.

In this embodiment, the transmission mechanism further comprises a push-clamp driving mechanism; the transmission mechanism further comprises a third state, and the transmission mechanism alternatively has the first state and the third state; in the first state, the clip feed drive mechanism drives the distal-most clip of the clip magazine 220 to advance into the jaw assembly; in the third state, the clip pushing driving mechanism drives the remaining clips in the clip box 220 to move forward by one station. Here, "the most distal clip" means the aforementioned "first clip", and "the remaining clips" means the aforementioned "other clips". In this embodiment, the clip applier can not only continuously apply clips, but also effectively avoid the interference problem of the clip delivering action and the clip pushing action because the clip delivering driving mechanism and the clip pushing driving mechanism execute the clip pushing action asynchronously when the first state and the third state are in different time, and simultaneously, because the clip delivering driving mechanism and the clip pushing driving mechanism are independent driving mechanisms, the design space is increased, and the structure of the clip delivering driving mechanism and the clip pushing driving mechanism is stable and reliable. Therefore, the clamping feeding and pushing actions are more stable and reliable by adopting the technical scheme of the embodiment, and the safety of the clamp applying forceps is improved.

In this embodiment, the transmission mechanism includes a driving member and a coupling mechanism; the driving member abuts against the actuating member 330 to receive power, one part of the coupling mechanism is connected with the driving member, the other part of the coupling mechanism is connected with the push clamp driving mechanism, and a distance is reserved between one part of the coupling mechanism and the other part of the coupling mechanism. A driving member for driving the clip feeding driving mechanism to advance to push the clip at the distal end of the clip box 220 to move forward into the jaw assembly, and for driving the adapting mechanism to move to drive the clip pushing driving mechanism to move backward to store energy; the push clamp driving mechanism comprises a third resetting piece for storing the energy; the energy is released and the clip pushing drive mechanism advances under the action of the third restoring member to advance the remaining clips in the clip magazine 220 one station. That is, when the clip feeding driving mechanism advances through the adapting mechanism, the clip pushing driving mechanism retreats to store energy, and the clip feeding action executed by the clip feeding driving mechanism and the clip pushing action executed by the clip pushing driving mechanism are asynchronous. The driving member is the switching mechanism, and is used for selectively driving the clamp feeding driving mechanism or the jaw driving mechanism. In a first state, the driving piece is separated from the jaw driving mechanism and is combined with the clamp feeding driving mechanism to drive the clamp feeding driving mechanism to advance, and meanwhile, the matching mechanism is driven to move to drive the clamp pushing driving mechanism to retreat so as to store first energy; in a second state, the driving piece is combined with the jaw driving assembly to drive the jaw driving mechanism to advance and separate from the clip feeding driving mechanism, and meanwhile, the matching mechanism is driven to move to drive the clip pushing driving mechanism to retreat so as to store second energy; the first energy and the second energy together comprise the energy, and in the third state, the clip pushing driving mechanism advances under the action of the energy to advance the remaining clips in the clip box 220 by one station. That is, the push-clamp driving mechanism is connected with the switching mechanism through the matching mechanism, and the movement directions of the push-clamp driving mechanism and the switching mechanism are opposite; under the action of the actuating member 330, the switching mechanism is first separated from the jaw driving mechanism, and is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to advance so as to perform the clip feeding action, and then separated from the clip feeding driving mechanism, and is combined with the jaw driving mechanism to drive the jaw driving mechanism to advance so as to perform the jaw closing action. When the switching mechanism drives the clip feeding driving mechanism and the jaw driving mechanism to advance, the adapting mechanism is driven to move simultaneously to drive the clip pushing mechanism to retreat and store energy; when the actuator 330 is released, the clip pushing driving mechanism advances under the action of the third resetting member to perform the clip pushing action. How the switching mechanism is combined with and separated from the clamp feeding driving mechanism and the jaw driving mechanism is described in the above description, and is not described in detail here.

In another embodiment, the driving member does not have a clutch function, the driving member is connected to the clip feeding driving mechanism and the clip pushing driving mechanism respectively, the actuating member 330 includes a first actuating member 330 and a second actuating member 330, the first actuating member 330 abuts against the driving member, and the second actuating member 330 abuts against the jaw driving mechanism. In the first state, the driving member drives the clip feeding driving mechanism to advance under the action of the first actuating member 330 so as to move the clip at the distal end of the clip box 220 forward into the jaw assembly, and simultaneously drives the coupling mechanism to move so as to drive the clip pushing driving mechanism to retreat so as to store energy; the push clamp drive mechanism includes a third reset member for storing said energy. In the third state, the first actuating member 330 is released and the clip pushing drive mechanism is advanced by the third restoring member to advance the remaining clips in the clip magazine 220 one station. After releasing the first actuator 330, pressing the second actuator 330 drives the jaw drive assembly to close the jaw assembly. Of course, before the first actuating member 330 is released and the clip feeding operation is completed, the second actuating member 330 may be pressed to drive the jaw driving assembly to close the jaw assembly, and after the jaw assembly is closed, the first actuating member 330 is released to advance the clip pushing driving mechanism under the action of the third resetting member to advance the remaining clips in the clip box 220 by one station.

The jaw driving mechanism is sleeved on the clamp feeding driving mechanism, and in a first state, the proximal end surface 502 of the clamp feeding driving mechanism and the proximal end surface 502 of the jaw driving mechanism are gradually close to each other, and the distal end surface 508 of the driving piece and the proximal end surface 502 of the jaw driving mechanism are gradually close to each other; in the second state, the proximal face 502 of the jaw drive mechanism is spaced progressively from the proximal face 502 of the clip feed drive mechanism, and the distal face 508 of the driver abuts the proximal face 502 of the jaw drive mechanism. For the structure, position relationship and the like of the jaw driving mechanism and the clip feeding driving mechanism, reference is made to the foregoing contents, and details are not repeated here.

The matching and connecting mechanism comprises a first matching and connecting piece, an intermediate piece and a second matching and connecting piece, the first matching and connecting piece is connected with the driving piece, and the second matching and connecting piece is connected with the pushing and clamping driving mechanism; the first connecting piece drives the second connecting piece through the middle piece, and the moving direction of the first connecting piece is opposite to that of the second connecting piece; the driving piece drives the first matching piece to advance; when the first matching piece moves forward, the second matching piece moves backward to drive the pushing and clamping driving mechanism to move backward. The structure of the docking mechanism will be described in detail below.

The push clamp driving mechanism further comprises a push clamp driving piece. The push clamp driving member is connected to the adapting mechanism and the third reset member, specifically, one end of the third reset member is connected to the housing 321, and the other end is connected to the proximal end of the second adapting member. It will of course be appreciated that the third return member may also be directly connected to the push clamp driver. The push-clamp driving piece is connected with the far end of the second connecting piece, a plurality of side cavities 252 are formed in the push-clamp driving piece at intervals along the longitudinal direction, a push-clamp block 253 is correspondingly installed in each side cavity 252, and the push-clamp driving piece drives the push-clamp block 253 to move under the action of the third resetting piece so as to enable the remaining clamps in the clamp box 220 to move forward by one station. More specifically, the push clamp driving member includes a push clamp proximal driving member and a push clamp distal driving member, which is the aforementioned push clamp assembly or push clamp base 250. The third restoring member may be an elastic member, such as a spring. In this embodiment, the proximal driving member of the push clamp is a mating block 452, the distal driving member of the push clamp includes a push rod 251 and a push block 253, the proximal end of the mating block 452 is connected to the distal end of the second mating member, and the distal end of the mating block 452 is connected to the push rod 251. A plurality of side cavities 252 are arranged at equal intervals along the shaft direction of the push-clamping rod 251, and each side cavity 252 is correspondingly provided with a push-clamping block 253. Each pusher-clamp block 253 is deflectably disposed within a corresponding side cavity 252 of the pusher-clamp bar 251 by a resilient member 254, such as a spring. Specifically, the pusher-clamp block 253 is mounted at a proximal end thereof in the pin hole 404 of the upper and lower walls of the side cavity 252 via the rotating shaft 255, and the elastic member 254 is disposed in the side cavity 252, and has a proximal end connected to the proximal end of the side cavity 252 and a distal end connected to the proximal end of the pusher-clamp block 253. In the initial state, the distal ends of the pusher-clamp blocks 253 are inclined downwards along the shaft of the offset pusher-clamp rod 251 under the action of the elastic members 254, and the distal end of each pusher-clamp block 253 abuts against the tail end of a corresponding clamp in the clamp box 220; when the pinch bar 251 is retracted, the pinch bar 253 is forced by the clip to pivot upward around the pivot 255 toward the pinch bar 251, so that the pinch bar 253 does not interfere with the clip when the pinch bar 251 is retracted. When the backward movement of the pushing and clamping rod 251 is finished, each pushing and clamping block 253 moves to the tail part of the clamp adjacent to the near end of the pushing and clamping block 253 to abut against or move to the rear part of the clamp adjacent to the near end of the pushing and clamping block 253 for a preset distance, in the third state, the pushing and clamping rod 251 drives the pushing and clamping block 253 to move forward, and when the pushing and clamping block 253 moves forward, the rest clamps in the clamping box 220 are pushed forward for one station to prepare for the next clamping.

In order to fully utilize the internal space of the clip applier, so that the structure of the clip applier is more compact, and simultaneously, in order to make the center of gravity of the clip applier more stable and more convenient to operate, the proximal driving piece of the clip pusher is sleeved with the proximal driving piece of the clip pusher, and the distal driving piece of the clip pusher are located at two sides of the clip box 220.

As can be seen from the foregoing, the jaw drive mechanism includes a jaw drive tube 432, a sleeve 210 connected to the jaw drive tube 432, the jaw drive tube 432 driving the sleeve 210 to move, thereby driving the jaw assembly to move; the clip feed drive mechanism includes a clip feed drive tube 402, a clip feed assembly coupled to the clip feed drive tube 402, the clip feed drive tube 402 driving the clip feed assembly to move, thereby driving the distal-most clip of the clip magazine 220 into the jaw assembly. In order to make the whole structure of the transmission mechanism more compact, fully utilize the space and reduce the whole volume of the clip applier, the clip feeding driving mechanism, the jaw driving mechanism and the clip pushing driving mechanism are arranged along the longitudinal direction. The projection of the feeding and clamping driving tube 402 on the plane perpendicular to the longitudinal direction is located in the projection of the jaw driving tube 432 on the plane, the feeding and clamping driving mechanism can move in the jaw driving mechanism along the longitudinal direction, and the projection of the jaw driving tube 432 on the plane perpendicular to the longitudinal direction is located in the projection of the driving piece (i.e. the switching mechanism) on the plane; the projection of this plane of the pusher-gripper proximal drive member is located within the projection of the pusher-gripper drive tube 402 in this plane, the pusher-gripper drive mechanism is capable of moving in a longitudinal direction within the pusher-gripper drive mechanism, and the pusher-gripper distal drive member and pusher-gripper assembly are located on either side of the gripper box 220. Further, the clip proximal driver, the clip pushing proximal driver, and the jaw drive tube 432 are coaxial. Specifically, the clip feed drive tube 402 is disposed within the jaw drive tube 432, the proximal end of the clip push drive member is disposed within the clip feed drive tube 402 and is capable of moving within the clip feed drive tube 402, and more specifically, the proximal end of the mating block 452 is disposed within the clip feed drive tube 402, and the clip push rod 251 and clip push assembly are disposed on opposite sides of the clip magazine 220. For the structure, position, etc. of the cartridge 220, reference is made to the foregoing description and no further description is provided herein.

As can be seen from the above description, the clip applier comprises a knob 310, a pin 316 is disposed in the knob 310, one end of the pin 316 is mounted at a first position on the side wall of the knob 310, and the other end of the pin 316 passes through the proximal driving member of the jaw driving mechanism, the proximal driving member of the clip feeding driving mechanism, the base 240 and the clip box 220 and is mounted at another position on the side wall of the knob 310, which is symmetrical to the first position; the proximal end driver of the jaw drive mechanism is provided with a second kidney-shaped hole 404448, the proximal end driver of the clip feeding drive mechanism is provided with a first kidney-shaped hole 420, the base 240 is provided with a first pin hole 416404, and the clip box 220 is provided with a second pin hole 404. In order to enable the pushing and clamping driving mechanism to rotate together with the knob 310, the proximal end driver of the pushing and clamping driving mechanism is provided with a third waist-shaped hole 458404 for accommodating a pin 316, one end of the pin 316 is installed at a first position of the side wall of the knob 310, and the other end of the pin passes through the first waist-shaped hole 420, the second waist-shaped hole 404448, the first pin hole 416404, the second pin hole 404 and the third waist-shaped hole 458404 and then is installed at another position of the side wall of the knob 310, which is symmetrical to the first position, so that the jaw driving mechanism, the feeding and clamping driving mechanism, the clamping box 220 and the pushing and clamping driving mechanism can rotate together with the knob 310.

The working process of the clip applier for realizing clip feeding, closing of the jaw components and clip pushing is described in detail as follows:

an operator presses the actuating member 330 to move the actuating member 330 from the open position to the intermediate position, the driving member (i.e., the switching mechanism) drives the clip feeding driving mechanism to advance under the action of the actuating member 330, and simultaneously drives the adapter mechanism to drive the clip pushing driving mechanism to retreat, when the clip pushing driving mechanism retreats, the third resetting member stores energy, and during the process, the proximal end of the clip feeding driving tube 402 and the distal end of the driving member gradually approach the proximal end of the jaw driving tube 432; when the actuator 330 moves to the intermediate position, the moving member of the driving member moves to the second guide surface 496 in the housing 321, the locking block 482 is disengaged from the locking groove of the clip feeding driving tube 402, the driving member is separated from the clip feeding driving mechanism, the forward stroke of the clip feeding driving mechanism is finished, the clip at the farthest end of the clip box 220 is fed into the jaw assembly (the clip feeding operation is completed), and the distal end surface 508 of the driving member abuts against the proximal end surface 502 of the jaw driving mechanism. The retaining end 354 of the clip feed retaining mechanism is capable of abutting the clip feed drive tube 402 after the driver is separated from the clip feed drive mechanism to prevent the clip in the jaw assembly from backing out due to the backing out of the clip feed drive mechanism. Continuing to press the actuator 330, the actuator 330 moves from the intermediate position toward the closed position, and the clip feeding retaining mechanism gradually disengages from the clip feeding driving pipe 402; the driving member pushes the jaw driving mechanism to move forward under the action of the actuating member 330, and simultaneously drives the adapting mechanism to drive the push-clamp driving mechanism to move backward, when the push-clamp driving mechanism moves backward, the third resetting member of the push-clamp driving mechanism continues to store energy, the jaw driving tube 432 drives the sleeve 210 to move forward to close the jaw assembly, until the actuating member 330 is pressed to move to the closing position, the forward stroke of the jaw driving mechanism is finished (the jaw closing action is finished), when the energy storage of the third resetting member is finished, the clamp feeding stopping mechanism is completely separated from the clamp feeding driving tube 402, and the clamp feeding driving tube 402 is reset under the action of the first resetting member 418. The actuator 330 is released, the jaw drive mechanism is reset by the second reset member 446, and the pinch drive mechanism is advanced by the third reset member to advance the remaining clips in the clip magazine 220 one station (pinch motion complete).

The above-mentioned coupling mechanism is described in detail below.

The adapting mechanism comprises a first adapting piece, an intermediate piece and a second adapting piece, and the first adapting piece drives the second adapting piece through the intermediate piece; the firing driving mechanism is linked with the first connecting piece; the repeating driving mechanism is linked with the second connecting piece; the movement direction of the first connecting piece is opposite to that of the second connecting piece, wherein the firing driving mechanism comprises the clamp conveying driving mechanism and a jaw driving mechanism and is used for finishing clamp conveying action and clamp applying action (jaw closing action), and the continuous transmitting driving mechanism is the clamp pushing driving mechanism and is used for finishing clamp pushing action. The linkage here means that two moving parts are connected, and the moving directions of the two moving parts are the same and move synchronously. The clamp feeding driving mechanism and the clamp pushing driving mechanism are independent driving mechanisms, so that the design space is increased, the clamp feeding and pushing actions can be executed more reliably and stably, the asynchronism of the clamp pushing action, the clamp feeding action and the clamp applying action is realized through the adapting mechanism, the interference problem of the clamp feeding action and the clamp pushing action is effectively avoided, and the safety and the reliability of the clamp applying action are effectively improved.

The firing driving mechanism is linked with the first connecting piece through a switching mechanism, and the switching mechanism is used for selectively driving the clamp feeding driving mechanism and the jaw driving mechanism; specifically, the proximal end of the switching mechanism is fixedly connected with the first connecting piece, and the switching mechanism is detachably connected with the firing driving mechanism. When the actuating piece 330 is pressed, the switching mechanism drives the clamp feeding driving mechanism to advance to perform clamp feeding action and drives the jaw driving mechanism to advance to perform clamping action under the action of the actuating piece 330, and simultaneously drives the first connecting piece to advance so as to drive the continuous sending driving mechanism to retreat to store energy; the burst drive mechanism comprises a third reset for storing the energy; the actuator 330 is released and the burst drive mechanism advances under the influence of the third reset member to perform the push-clamping action. The structure, positional relationship, connection relationship, etc. of the switching mechanism, the clip feeding driving mechanism, the jaw driving mechanism, and the clip pushing driving mechanism are the same as those described above, and are not described herein again.

The first coupler includes an upper rack 462, the second coupler includes a lower rack 468, and the intermediate piece includes a first gear 464 and a second gear 466; the upper rack 462 is engaged with the first gear 464, the lower rack 468 is engaged with the second gear 466, the first gear 464 and the second gear 466 are coaxially arranged, the diameter of the first gear 464 is larger than that of the second gear 466, that is, the firing driving mechanism is connected with the upper rack 462 through the switching mechanism, the repeating driving mechanism is connected with the lower rack 468, the moving directions of the upper rack 462 and the lower rack 468 are opposite, when the upper rack 462 moves in the first direction for a first distance, the lower rack 468 moves in the direction opposite to the first direction for a second distance, that is, when the firing driving mechanism moves in the first direction for the first distance, the repeating driving mechanism moves in the second direction opposite to the first direction for a second distance, and the first distance is larger than the second distance. Wherein, the first direction is the advancing direction of the clamp feeding driving mechanism and the jaw driving mechanism. In the process that the trigger driving mechanism moves forward for a first distance, the clip sending action and the clip applying action need to be completed, the continuous-hair driving mechanism stores energy in the process of retreating for a second distance, the actuating element 330 is released to move forward to complete the clip pushing action, the retreating distance of the continuous-hair driving mechanism is equal to the advancing distance of the continuous-hair driving mechanism, the advancing distance of the continuous-hair driving mechanism is equal to the distance of one working position for advancing the clips in the clip box 220, the retreating second distance is smaller than the first distance of the trigger driving mechanism, the clips in the clip box 220 can be arranged as closely as possible, namely more clips can be accommodated in the clip box 220, the number of continuous clip applying times is increased, and the surgical requirements of doctors are met.

In order to make the layout of the coupling mechanism more reasonable and the structure more compact, the first coupling piece and the second coupling piece are arranged along the longitudinal direction, and the intermediate piece is arranged between the first coupling piece and the second coupling piece and is arranged along the direction vertical to the longitudinal direction.

In order to make the overall structure more compact, the burst drive and the second coupling piece are moved in the longitudinal direction within the clip drive. The axis of the first connecting piece is vertical to the axis of the middle piece and is parallel to the axis of the second connecting piece; the axis of the second coupling member is coaxial with the axis of the proximal drive member (the coupling block 452) of the firing drive mechanism and the axis of the proximal drive members (the clip feed drive tube 402 and the jaw drive tube 432) of the firing drive mechanism. In order to prevent the first and second couplers from shaking and moving more stably, a first guide groove 472 and a second guide groove 474 are provided in the housing 321, the first coupler moves in the first guide groove 472, and the second coupler moves in the second guide groove 474.

In view of the foregoing, the repeating driving mechanism includes a pushing clamp driving member and a third resetting member, and the pushing clamp driving member is connected with the distal end of the second coupling member; the push clamp driving member is provided with a plurality of side cavities 252 at intervals along the longitudinal direction, each side cavity 252 is correspondingly provided with one push clamp block 253, and the push clamp driving member moves under the action of the third resetting member so that the push clamp blocks 253 move to execute the push clamp action. The third resetting piece stores energy when the hair repeating driving mechanism retreats, and in order to make the whole structure more compact and make full use of space, the third resetting piece of the hair repeating driving mechanism is positioned in the second guide groove 474, one end of the third resetting piece is connected with the near end of the second matching piece, and the other end of the third resetting piece is connected with the shell 321 positioned at the near end of the second guide groove 474.

In order to ensure that the second coupling piece connected with the burst driving mechanism cannot rotate when the burst driving mechanism rotates along with the knob 310, the far end of the second coupling piece is provided with an accommodating space, the accommodating space is provided with an opening for facilitating installation, and the near end of the push clamp driving piece is accommodated in the accommodating space through the opening and can rotate in the accommodating space; the proximal end of the push-clip driving member has a stopping portion 506 abutting against a limiting surface 470 in the accommodating space, so that the continuous-hair driving mechanism is axially fixed to the distal end of the second coupling member.

The working process of the clamp feeding action, the clamp applying action and the clamp pushing action executed by the transmission mechanism of the clamp applying machine is described in detail below by combining the adapting mechanism:

an operator presses the actuating member 330 to move the actuating member 330 from the open position to the intermediate position, the switching mechanism drives the clip driving mechanism and the first coupling member to advance under the action of the actuating member 330, the first coupling member drives the second coupling member to retreat through the intermediate member, the second coupling member is connected with the clip pushing driving mechanism to further drive the clip pushing driving mechanism to retreat, when the clip pushing driving mechanism retreats, the third resetting member 456 of the clip pushing driving mechanism stores energy, and in the process, the proximal end of the clip driving tube 402 and the distal end of the switching mechanism gradually approach to the proximal end of the jaw driving tube 432; when the actuator 330 moves to the neutral position, the moving member of the switching mechanism moves on the second guide surface 496 in the housing 321, the engaging piece 482 of the switching mechanism disengages from the engaging groove of the clip feeding driving tube 402, the switching mechanism is separated from the clip feeding driving mechanism, and the forward stroke of the clip feeding driving mechanism is completed (the clip feeding operation is completed). The retaining end 354 of the clip feed retaining mechanism is capable of abutting the clip feed drive tube 402 after the switching mechanism is separated from the clip feed drive mechanism to prevent the clip in the jaw assembly from backing up due to the backing up of the clip feed drive mechanism. Continuing to press the actuator 330, the actuator 330 moves from the intermediate position toward the closed position, and the clip feeding retaining mechanism gradually disengages from the clip feeding driving pipe 402; the switching mechanism continues to push the jaw driving mechanism and the first coupling member forward under the action of the actuating member 330, meanwhile, the first coupling member continues to drive the second coupling member to retreat through the intermediate member, the push-clamp driving mechanism continues to retreat because the second coupling member is connected with the push-clamp driving mechanism, when the push-clamp driving mechanism retreats, the third resetting member 456 continues to store energy, the jaw driving pipe 432 drives the sleeve pipe 210 to advance to close the jaw assembly (the clamping action is completed), the energy storage of the third resetting member 456 is finished, the clamp feeding stopping mechanism completely disengages from the clamp feeding driving pipe 402, and the clamp feeding driving pipe 402 resets under the action of the first resetting member 418. The actuator 330 is released, the jaw drive mechanism is reset by the second reset member 446, and the push-clamp drive mechanism is advanced by the third reset member 456 thereof to advance the remaining clamps in the cassette 220 one station (push-clamp action complete).

In this embodiment, the clip feeding driving mechanism is used to drive the distal-most clip of the clip box 220 to move forward into the jaw assembly, and the clip pushing driving mechanism is used to drive the remaining clips in the clip box 220 to move forward one station; the clamp delivery driving mechanism comprises a clamp delivery near-end driving piece and a clamp delivery far-end driving piece connected with the clamp delivery near-end driving piece, and the clamp pushing driving mechanism comprises a clamp pushing near-end driving piece and a clamp pushing far-end driving piece connected with the clamp pushing near-end driving piece; the motion trail of the proximal driving piece of the feeding clamp is parallel to that of the proximal driving piece of the pushing clamp, and the motion trail of the distal driving piece of the feeding clamp is intersected with that of the distal driving piece of the pushing clamp. Different driving mechanisms are adopted to respectively execute the clamp feeding action and the clamp pushing action, the design space is increased, the clamp feeding action and the clamp pushing action can be executed more reliably and stably, the clamp feeding action is executed earlier than the clamp pushing action, the clamp feeding action and the clamp pushing action are asynchronous, mutual interference is avoided, and therefore safety and reliability of the clamp applying mechanism are effectively improved.

It should be noted that, in the present embodiment,

the motion trail refers to the motion trail formed in the motion process of each point on the element, when the motion trail of the element A and the motion trail of the element B are both straight lines, if at least one straight line in the motion trail of the element A is collinear with at least one straight line in the motion trail of the element B, the motion trail of the element A and the motion trail of the element B are called to be coaxial; if all the straight lines in the motion trail of the element A are parallel to all the straight lines in the motion trail of the element B, the motion trail of the element A is called to be parallel to the motion trail of the element B. The movement locus of an element refers to a movement locus formed in one execution cycle.

In this embodiment, the proximal driving member of the push clamp is partially movably located in the proximal driving member of the push clamp, and the distal driving member of the push clamp are located at two sides of the clamping box 220, specifically, the distal driving member of the push clamp is located at the side of the clamping box 220 (inside the clamping box 220) where the clamp is accommodated, and the distal driving member of the push clamp is located at the side of the clamping box 220 where the clamp is not accommodated (outside the clamping box 220). As can be seen from the foregoing, the proximal feeding and clamping driving member advances along the longitudinal direction, and drives the distal feeding and clamping driving member to move from the outside of the clamping box 220 to the plane where the clip is located and abut against the distal-most clip of the clamping box 220, so as to push the clip to advance to the jaw assembly, and when the feeding and clamping driving mechanism retreats, the proximal feeding and clamping driving member drives the distal feeding and clamping driving member to return to the initial position along the original path. The proximal driving member of the push clamp retreats along the longitudinal direction and drives the distal driving member of the push clamp to retreat, and when the distal driving member of the push clamp retreats, the distal end thereof moves to the rear of the clamp adjacent to the proximal end thereof from the position abutting against the corresponding clamp toward the bottom wall 221 of the clamp box 220 at the inner side of the clamp box 220. As the pusher-clip proximal drive member advances in the longitudinal direction, the pusher-clip distal drive member is driven to advance the remaining clips in the clip magazine 220 one station. Therefore, during the movement of the transmission mechanism, the movement track of the far-end driving part of the delivery clamp is intersected with the movement track of the far-end driving part of the push clamp, wherein the movement tracks of the elements are intersected, the extension lines of the movement tracks of the elements are also intersected, and the movement track of the near-end driving part of the delivery clamp is parallel to the movement track of the near-end driving part of the push clamp.

In this embodiment, the proximal driving member of the feeding clamp is sleeved on the proximal driving member of the pushing clamp, so that the structure of the transmission mechanism is more compact, and the space is fully utilized. The clamp feeding driving mechanism and the clamp pushing driving mechanism can move in the jaw driving mechanism. The jaw driving mechanism advances or retreats along the longitudinal direction, and the motion track of the jaw driving mechanism is parallel to the motion track of the proximal driving piece of the feeding clamp or the motion track of the proximal driving piece of the pushing clamp and intersects with the motion track of the distal driving piece of the feeding clamp or the motion track of the distal driving piece of the pushing clamp. The jaw driving mechanism comprises a jaw driving pipe 432 and a sleeve 210 connected with the jaw driving pipe 432, the jaw driving pipe 432 drives the sleeve 210 to move so as to close the jaw assembly, and the movement track of the jaw driving pipe 432 and the movement track of the sleeve 210 jointly form the movement track of the jaw driving mechanism. Due to the design, the transmission mechanism is reasonable in layout and compact in structure.

The proximal drive member of the clip includes a clip drive tube 402 and the distal drive member of the clip includes a clip delivery block 231; the clip feeding block 231 is used for driving the clip to be fed into the jaw assembly; the proximal pusher actuator comprises an engagement block 452 and the distal pusher actuator comprises a pusher block 253, the pusher block 253 being configured to drive the remaining clips in the clip magazine 220 forward one station; the motion track of the clamp feeding driving pipe 402 is parallel to the motion track of the matching block 452 and the motion track of the jaw driving mechanism, and the motion track of the clamp feeding block 231 is intersected with the motion track of the clamp pushing block 253 and the motion track of the jaw driving mechanism. To make the overall structure more compact, the mating block 452 is partially located within the feed clamp drive tube 402 and is movable in a longitudinal direction within the feed clamp drive tube 402, and the proximal end of the feed clamp drive tube 402 is located within the jaw drive tube 432 and is movable in a longitudinal direction within the jaw drive tube 432.

The clamp conveying block 231 is connected with the clamp conveying driving pipe 402 through a clamp conveying rod 233; the clamp feeding driving mechanism further comprises a base 240 fixed with the shell 321, and the base 240 is in sliding fit with the clamp feeding rod 233; the base 240 is provided at its distal end with a guide slope 498243 for guiding the clip-feeding block 231 to be pushed out of the base 240 to drive the distal-most clip of the clip magazine 220; the motion track of the feeding and clamping rod 233 is parallel to the motion track of the jaw driving mechanism. The push clamp block 253 is connected with the matching block 452 through the push clamp rod 251, a plurality of side cavities 252 are arranged along the rod body direction of the push clamp rod 251, and one push clamp block 253 is correspondingly arranged in each side cavity 252; the motion track of the push rod 251 is parallel to the motion track of the jaw driving mechanism. The design makes the whole machine reasonable in layout and fully utilizes the space.

The movement track of the clip feeding block 231 and the movement track of the clip pushing block 253 will be described in detail below, please refer to fig. 23A and 23B, which are schematic diagrams of the movement process of the clip feeding block 231 and the movement track thereof when the clip feeding driving mechanism advances; as can be seen from the above, the clip feeding block 231 moves from the first plane of the base 240 to the guiding inclined surface 498243 at the distal end of the base 240, and then moves along the guiding inclined surface 498243 to the second plane of the clip to abut against the farthest clip of the clip box 220, the moving process is shown in fig. 23A, and it can be derived that the moving track formed by any point thereon is shown in fig. 23B. As shown in fig. 24A and 24B, the movement process and the movement track of the clamp pushing block 253 are illustrated when the clamp pushing driving mechanism retreats. As can be seen from the foregoing, the pushing and clamping block 253 retreats along with the pushing and clamping driving mechanism, when the pushing and clamping block 253 retreats to the clamp adjacent to the proximal end thereof, the distal end of the pushing and clamping block 253 is turned upwards around the rotating shaft 255 by an upward force, when the pushing and clamping block 253 retreats continuously to the rear of the clamp adjacent to the proximal end thereof, the distal end of the pushing and clamping block 253 is turned downwards to the original position under the action of the spring, the movement process is as shown in fig. 24A, the movement track of the pushing and clamping block 253 can be obtained from the movement track, taking the point E at the distal end of the pushing and clamping block 253 as an example, and the movement track formed by the point E is as shown in fig. 24B. It should be noted that. The indication is only schematic, and the motion track can be adjusted according to different practical specific designs, such as the radian of a curve. Therefore, during the movement of the transmission mechanism, the movement track of the clamping feeding block 231 is intersected with the movement track of the clamping pushing block 253.

The transmission mechanism also comprises a switching mechanism and a matching mechanism, and the switching mechanism is used for selectively driving the clamp feeding driving mechanism or the jaw driving mechanism; one part of the matching mechanism is connected with the switching mechanism, the other part of the matching mechanism is connected with the push clamp driving mechanism, and a distance is reserved between the one part and the other part; the switching mechanism drives the clamp feeding driving mechanism and the jaw driving mechanism to move along a first direction under the action of the actuating piece 330, and drives the adapter mechanism to move to drive the clamp pushing driving mechanism to move along a second direction to store energy, wherein the first direction is opposite to the second direction; the push clamp drive mechanism includes a third reset 456 for storing this energy. Releasing the actuator 330 and advancing the clip-pushing drive mechanism by the third reset element 456 to advance the remaining clips in the clip magazine 220 one station; the movement track of the switching mechanism is coaxial with the movement track of the jaw driving mechanism, so that the space is fully utilized, and the structure is more compact. The matching mechanism comprises a first matching piece and a second matching piece driven by the first matching piece, the first matching piece is connected with the switching mechanism, and the second matching piece is connected with the push clamp driving mechanism; the movement track of the first connecting piece is parallel to the movement track of the jaw driving mechanism, and the movement track of the second connecting piece is parallel to the movement track of the jaw driving mechanism. Therefore, the structure of the whole transmission mechanism is more compact, and the space is fully utilized.

In this embodiment, as shown in fig. 25 to 33D, the clip applier also has a structural design for achieving locking of a particular position of the wrench, as described in detail below.

In this embodiment, the wrench is movably connected to the housing 321 of the main body 320, and the wrench can move in three specific positions: at the initial moment, a user does not operate the wrench, and the wrench is located at an opening position; a user operates the wrench, and the position of the wrench is the middle position when the clamping feeding is finished; the user operates the wrench, the position of the wrench is the closed position when clamping is completed, and the user cannot operate the wrench to move further. From the initial moment, the user keeps operating the wrench, which moves from the open position to the intermediate position to the closed position. The movement of the wrench towards the direction of the closed position is defined as the forward movement of the wrench, and the movement of the wrench from the open position towards the middle position and the movement of the wrench from the middle position towards the closed position belong to the forward movement; correspondingly, a movement of the wrench in the direction towards the open position is defined as a return movement of the wrench, and likewise a movement of the wrench from the closed position towards the intermediate position and a movement of the wrench from the intermediate position towards the open position are both return movements. The wrench is defined to move from the open position to the middle position as a first section of forward movement of the wrench, the wrench is defined to move from the middle position to the closed position as a second section of forward movement of the wrench, the wrench is defined to move from the closed position to the middle position as a second section of reset movement of the wrench, and the wrench is defined to move from the middle position to the open position as a first section of reset movement of the wrench. The user operates the wrench in a forward motion, and in response to the user operation, the wrench moves from the open position to the intermediate position and then to the closed position.

In accordance with the above, at least a portion of the clip feeding driving mechanism and at least a portion of the jaw driving mechanism are accommodated in the housing 321, and the clip feeding driving mechanism and the jaw driving mechanism are connected to the wrench and driven by the wrench to move forward as described above. A clip feed drive mechanism drives the clip forward into the jaw assembly in response to movement of the wrench from the open position to the intermediate position. When the spanner is located at the middle position, the clamp is located at a preparation position, namely, a first section of forward motion of the spanner drives the clamp feeding action and realizes the clamp feeding in place, the preparation position is a position where the first clamp is stably clamped by the jaw assembly and can be effectively compressed to a closed state, if the clamp slides in the jaw assembly and is not located at the preparation position, the support performance of the clamp is insufficient in the clamping process, so that the clamp is automatically ejected or twisted, and the compression effect is poor. The jaw drive mechanism drives the jaw drive mechanism to move previously in response to the wrench moving from the intermediate position to the closed position to drive the jaw assembly to move closed, the jaw assembly being in the closed position with the wrench in which a second forward movement of the wrench drives the closing motion and effects the closing of the jaws to the end and clamping in place with the clamp in place being compressed to the closed position.

The clip applier of this embodiment is a clip applier capable of continuously applying a plurality of clips, and in order to achieve continuous clip application, the wrench needs to be reset to move to an open position in preparation for next clip application. If the user also operates the reset, the reset is troublesome, and the user experience is poor. In this embodiment, the clamp applying forceps further includes a wrench resetting mechanism connected to the wrench, and when the user stops operating the wrench, the wrench resetting mechanism drives the wrench to perform a resetting movement, and a direction of the resetting movement is opposite to a direction of the forward movement. The spanner reset mechanism comprises an elastic element, the elastic element is compressed and deformed to store energy when the spanner moves forwards, and the elastic element restores the shape under the action of the stored energy when the spanner is not operated, so that reset force is provided to enable the spanner to do reset movement. In this embodiment, the wrench resetting mechanism is the third resetting member 456 of the pushing and clamping driving mechanism, and the connection between the third resetting member 456 and the wrench is as described above, when the wrench is loosened, the third resetting member 456 itself is reset to move and drive the input member to move backward through the above-mentioned adapting structure, so that the driving surface 504 of the input member pushes the wrench to move for resetting. In another embodiment, the wrench resetting mechanism comprises a second resetting member 446 of the jaw driving mechanism in addition to the third resetting member 456, the second resetting member 446 provides the resetting force to the handle in addition to the resetting force provided by the third resetting member 456 during the movement of the wrench from the closed position to the intermediate position, and specifically, the jaw driving tube 432 is always in contact with the input member during the movement of the wrench from the closed position to the intermediate position, the second resetting member 446 drives the jaw driving tube 432 to retreat during the self-resetting movement, the jaw driving tube 432 pushes the input member to retreat, so that the driving surface 504 of the input member pushes the wrench to perform the resetting movement until the jaw driving tube 432 returns to the initial position and disengages from the input member, and the third resetting mechanism alone provides the resetting force to the wrench from this moment.

The doctor operates the wrench to move forward to sequentially execute the clip feeding and the clip applying, and if no obvious pause or limit exists between the clip feeding action and the clip applying action, the use feeling of the doctor is poor. The clamping jaw of the present embodiment further includes a wrench locking mechanism, the wrench locking mechanism includes a guide 351 and a guide channel 340 disposed on the wrench and moving along with the wrench, the guide channel 340 includes a starting point a, a locking point b and an ending point, at least a portion of the guide 351 is received in the guide channel 340, and the guide 351 and the guide channel 340 move relatively; guide 351 is relatively moved from start point a to lock point b in response to movement of the wrench from the open position to the intermediate position, and guide 351 is relatively moved from lock point b to the end point in response to movement of the wrench from the intermediate position to the closed position. When the user operates the wrench in the forward direction and the wrench is not operated, the guide 351 prevents the wrench from moving to the reset position at the locking point b. The user operates the wrench to move the wrench, which moves the guide channel 340, so that the guide channel 340 moves relative to the guide member 351, also referred to as the guide member 351 moves relative to the guide channel 340 or the guide member 351 moves relative to each other. The guiding channel 340 is a closed channel disposed on the wrench, and the guiding element 351 cannot be separated from the guiding channel 340 and thus cannot be separated from the wrench. Therefore, the locking point b of the wrench locking mechanism can provide a pause point for clip feeding and clip applying actions, a doctor can observe whether the position of the jaw assembly is suitable for the tissue to be clamped or not at the pause point, the position of the jaw assembly can be adjusted if necessary, and the user experience is improved; the self structure of the wrench is utilized to provide the locking point b, so that the structure is simple; the guide passage 340 of the wrench is a closed passage, the moving passage of the guide 351 is stable, and the locking effect of the wrench is stable.

Further, in the guide passage 340, the guide member 351 prevents the reset movement of the wrench only when the guide member 351 is located at the locking point b. That is, the guide path 340 provides only one locking point b for preventing the wrench from moving in the reset direction, and the wrench reset mechanism drives the wrench to move in the reset direction when the wrench is stopped at any position except the open position and the intermediate position. Therefore, in the process of operating the wrench, the wrench is locked only at the middle position to remind that the clamp feeding is finished, the interference of other positions is avoided, and the user experience is improved.

Further, the wrench is moved forward between the neutral position and the closed position before reaching the closed position, when the operation of the wrench is stopped, the wrench resetting mechanism drives the wrench to move to the neutral position, the guide member 351 is moved to the locking point b in response to the wrench moving to the neutral position, and the guide member 351 prevents the wrench from continuing the reset movement at the locking point b. Like this, further make full use of only one locking point that stops the spanner motion that resets that guide channel 340 provided, if stop operating the spanner in executing the clamp in-process, the spanner will stop to sending the intermediate position that presss from both sides the completion, rather than directly resetting to the open position, avoid user's operation spanner to cross the intermediate position and can't learn to send and press from both sides the completion condition, provide the user and send the chance of observing the operation condition and adjusting the position that presss from both sides of subassembly of keeping silent before pressing from both sides the completion, improve user experience.

Furthermore, when the wrench resetting mechanism drives the wrench to reset to move to the middle position, the jaw driving mechanism is driven to move backwards at the same time, so that the jaw assembly is driven to open and move. The drive jaw drive mechanism is moved rearwardly and the jaw assembly is opened, whether before or after the wrench reaches the closed position, such as when a second reset movement occurs. In particular, the clip applier has begun to apply the clip, but has not completed applying the clip, the wrench has not reached the closed position, the jaw assembly has not bottomed out, the clip has not been compressed to the closed position, and at this point the wrench is released, the clip applier can abort the clip application process, the jaw assembly returns to the open bottomed state, the clip returns to the open state, and subsequent adjustments to the position of the jaw assembly on the tissue will not damage the tissue, making the design safer and more humanized.

The guide passage 340 is a closed groove. The closed slot is a circumferentially enclosed slot in which the guide 351 is restrained from moving circumferentially, so that in this embodiment the guide 351 cannot be disengaged from the wrench. The closing groove provides a fixed moving channel for the guide 351, and the moving stability is strong, thereby also making the locking stability of the guide 351 and the guide channel 340 at the locking point b good. In this embodiment, as shown in fig. 25 in particular, the closed slot is a closed slot that extends through the body 320 of the wrench, radially perpendicular to the axial direction. In other embodiments, the guide channel 340 may be a closed slot that does not extend through the wrench body 331320, but rather only provides a closed channel in which the guide 351 moves.

In this embodiment, as shown in fig. 25, the wrench includes a wrench main body 331320, a pressing portion 332 provided at one end of the wrench main body 331320 and operated by a user, and a pushing portion 333 provided at the other end of the trigger main body 320, and the pushing portion 333 abuts against and pushes the clip feeding driving mechanism or the jaw driving mechanism to move. Wrench body 331320 is provided with a pivot end 334 pivotally connected to housing 321 of body 320 of operating assembly 300. The guide channel 340 is located between the wrench body 331320 and the pivot end 334 and the pushing portion 333. Therefore, the guide channel 340 is located at the middle position of the wrench, the stability of the movement of the guide 351 is further improved, and the wrench locking mechanism is compact without designing an additional structure to arrange the guide channel 340.

In this embodiment, as shown in fig. 26, the guiding channel 340 includes a main channel 341 and only one slave channel 343 extending from an opening portion 342 of the main channel 341, the opening portion 342 is located between two ends of the main channel 341, two ends of the main channel 341 are respectively provided with a starting point a and an end point, and one end of the slave channel 343 far from the opening portion 342 is provided with a locking point b; the wrench body 331320 further includes a wrench locking resilient member 355, the wrench locking resilient member 355 applying a force to the guide 351 to disengage the main passage 341 into the secondary passage 343, such that the wrench locking resilient member 355 drives the guide 351 to disengage the main passage 341 into the secondary passage 343. With this configuration, the guide path 340 provides only one locking point for preventing the return movement of the wrench, and when the wrench is released during the first forward movement without reaching the intermediate position of the wrench, the wrench will return to the open position and stop, and when the wrench is moved further forward from the intermediate position, and when the wrench is released before reaching the closed position, the wrench will return to the intermediate position and be locked at the intermediate position by the locking point b of the wrench locking mechanism, and the return movement cannot be continued. Therefore, when the clamping feeding action is completed and before the clamping action is completed, the wrench is loosened, a user can obviously feel the pause of the wrench in the middle position, the pause is unique and is not interfered, the user is informed that the clamping feeding is completed and the clamping is not completed, the user can also adjust the position of the clamping pincers, and the user experience is good.

The secondary channel 343 comprises a blocking wall 344, and when the wrench is not operated and the guide 351 is at the locking point b, the guide 351 abuts against the blocking wall 344 in the direction of the resetting movement of the wrench, thereby preventing the resetting movement of the wrench at the locking point b. That is, the blocking wall 344 prevents the guide 351 at the locking point b from moving toward the starting point a. With a simple design of the channel wall of the secondary channel 343, the locking is achieved at the locking point b, no additional elements for locking are required, and the structure is simple and compact.

The main passage 341 includes a first wall extending from the start point a to be connected to the blocking wall 344, and the first wall and the blocking wall 344 form a right angle or an acute angle. The simple angle design of the guide channel can ensure that the blocking wall 344 effectively prevents the guide 351 from separating from the locking point b of the slave channel 343, and when the guide 351 enters the slave channel 343 from the main channel 341 in the forward motion, a collision sound is generated through a right angle point or an acute angle point, and the sound clearly reminds a user that the wrench reaches the middle position and reminds the user that the clamp is delivered in place at the moment.

The secondary channel 343 further includes a guide wall 345 connected to the blocking wall 344, the guide wall 345 guiding the guide 351 to move bidirectionally between the latching point b and the end point. With the simple structural design of the channel wall of the secondary channel 343, i.e. the bidirectional movement between the locking point b and the end point, the wrench cannot be locked in both directions, can be smoothly operated by the user to the closed position or reset to the intermediate position, does not require an additional guide element, and is simple and compact.

The main passage 341 also includes a second wall extending from the terminus to connect with the guide wall 345, the second wall being at an obtuse angle to the guide wall 345. The simple angle design of the guide channel further ensures that the bidirectional movement between the locking point b and the terminal point is realized, and the wrench cannot be locked in the bidirectional direction.

Specifically, as shown in fig. 25, the main channel 341 is an arc channel centered on the pivot end 334 of the wrench, the secondary channel 343 extends from the opening 342 of the main channel 341 in a direction away from the pivot end 334, that is, the distance between the secondary channel 343 and the pivot end 334 is greater than the distance between the primary channel 341 and the pivot end 334, the distance between the guide 351 and the pivot end 334 of the main channel 341 is defined as X, since the main channel 341 is the arc channel, the distance X of the guide 351 is constant (including the starting point a and the end point) when the main channel 341 moves, the distance between the guide 351 and the pivot end 334 when the guide 351 is located in the secondary channel 343 is defined as Y, when the guide 351 enters the secondary channel 343 and moves to the locking point b, Y is continuously increased, Y is always greater than X, and particularly, the distance Y when the guide 351 is located at the locking point b is defined as Y₀Is the maximum value. As can be seen from the above, when the wrench is moved and the guide 351 moves only relatively in the main passage 341, the guide 351 does not move relative to the housing 321. In the present application, the guiding channel 340 is not limited to the above shape, and in other embodiments, for example, the main channel 341 is an arc channel, and the distances from the two ends of the arc channel to the pivoting end 334 are different, but the above X of the arc channel is still smaller than Y, and the above wrench locking function is also realized, and the structure of the guiding channel 340 that can ensure the locking of the locking point b in cooperation with the slave channel 343, which is easily conceived by those skilled in the art, is within the protection scope of the present application.

In this embodiment, in order to enable the wrench locking elastic element 355 to drive the guiding member 351 to disengage from the main channel 341 and enter the secondary channel 343 ", the wrench locking mechanism further includes a guiding pivot 350, the guiding pivot 350 is accommodated in the housing 321, the guiding pivot 350 includes a pivoting end 352 pivoted to the housing 321, a force receiving end 353 extending from the pivoting end 352, and the guiding member 351, one end of the wrench locking elastic element 355 abuts against the force receiving end 353, and the other end abuts against the housing 321. When the elastic force of the wrench locking elastic element 355 acts on the stressed end 353, the guiding pivotal member 350 is driven to rotate with the pivoting end 352 as a rotation center, and meanwhile, the guiding pivotal member 351 is driven to rotate with the pivoting end 352 as a rotation center, so that the guiding pivotal member 350 defines the arc-shaped motion track of the guiding member 351, the stable back-and-forth switching between the main channel 341 and the auxiliary channel 343 is ensured, and the stability of the wrench locking mechanism is further ensured.

Specifically, as shown in fig. 27, in the present embodiment, the guide pivot 350 includes a first rotating arm 526 and a second rotating arm 526 extending from a pivot end 352, respectively, a force-bearing end 353 is disposed at a distal end of the first rotating arm 526, the guide 351 is disposed at a distal end of the second rotating arm 526, one end of the wrench locking elastic element 355 is connected to the force-bearing end 353, and the other end of the wrench locking elastic element 355 is connected to the housing 321. The first rotating arm 526 and the second rotating arm 526 form a lever with a pin shaft of the pivoting end 352 as a fulcrum, the wrench locking elastic element 355 and the guide 351 are positioned at two ends of the lever, the structure is stable, the wrench locking elastic element 355 is in a compression state, the wrench locking elastic element 355 applies a pushing force to the force bearing end 353, so that the force bearing end 353 and the guide 351 have a tendency of rotating clockwise, and when the guide 351 moves to the opening part 342 in the main channel 341, the guide 351 rotates clockwise to be lifted upwards into the auxiliary channel 343 and moves to the locking point b of the auxiliary channel 343 to be stopped. The first pivot arm 526 and the second pivot arm 526 may be levers that are horizontally connected as shown in fig. 27, or may be levers that are angularly connected. The above is a lever which is a specific embodiment of the guide pivot 350, and the structure of the guide pivot 350 is not limited to this, for example, in other embodiments, a first rotating arm 526 extends from a pivot end 352 of the guide pivot 350, the guide 351 is arranged at the end of the first rotating arm 526, and a point in the middle of the first rotating arm 526 is a force-bearing end 353 connected with a wrench locking elastic element 355, which also can realize that the wrench locking elastic element 355 applies a force to the guide 351 to separate from the main channel 341 into the slave channel 343 through the guide pivot 350, and all of which are within the protection scope of the present invention.

In the above manner, the wrench locking elastic element 355 is indirectly connected to the guide member 351 through the guide pivot 350, in other embodiments, the wrench locking elastic element 355 can also be directly connected to the guide member 351, so that the wrench locking elastic element 355 drives the guide member 351 to be separated from the main channel 341 and enter the auxiliary channel 343 ", in one embodiment, a" V "-shaped rod can be used as the wrench locking elastic element 355, one end of the V-shaped rod is fixedly connected with the housing 321, the other end of the V-shaped rod is provided with the guide member 351, the" V "-shaped rod is made of rigid material, the V-shaped bending part of the" V "-shaped rod is bent to a small extent, so that the guide member 351 is provided with a" force of separating from the main channel 341 and entering the auxiliary channel 343 ", but the rigid" V "-shaped rod is easy to wear and break; in another embodiment, the wrench locking elastic element 355 is made of an elastic material capable of generating large deformation, the wrench locking elastic element 355 is, for example, a "V" metal spring 522 or a spring, one end of the wrench locking elastic element is fixedly connected to the housing 321, and the other end of the wrench locking elastic element is provided with the guide 351, because the locking elastic element has large elasticity, the stability of the movement of the guide 351 connected to the locking elastic element in the channel is poor, and the function of locking the wrench in the middle position cannot be well realized. In summary, the indirect connection between the wrench locking resilient member 355 and the guide member 351 and the application of the force into the secondary channel 343 via the guide pivot member 350 employed in the present embodiment have the following advantages in addition to the above-mentioned advantages: the problem of part damage or fracture is difficult to appear, has guaranteed the stability that guide 351 removed, has further guaranteed spanner locking mechanical system's stability. Preferably, the wrench locking elastic member 355 is a spring in this embodiment.

The guide pivot 350 further includes a retaining end 354 extending from the pivot end 352, the retaining end 354 being disengaged from the clip drive mechanism prior to movement of the wrench from the open position to the intermediate position; before the wrench moves from the intermediate position to the closed position, the retaining end 354 is kept in contact with the clip feeding driving mechanism to prevent the clip feeding driving mechanism from moving backward.

Specifically, as shown in fig. 27, in the present embodiment, the guide pivot 350 is a third rotating arm 526 extending from a pivot end 352, and the end of the third rotating arm 526 is a stopping end 354, so that the guide 351, the stopping end 354 and the force bearing end 353 all move around the pivot end 352. At the initial moment, when the clamp is not used, the wrench is in an open position, the guide pivoting piece 350 is positioned below the clamp feeding driving mechanism, and the backstop end 354 is not in contact with the clamp feeding driving mechanism; when the wrench is moved forward and the guide 351 is moved toward the opening 342 in the main channel 341, the clip feeding driving mechanism moves forward, and the retaining end 354 is still not in contact with the clip feeding driving mechanism; when the guide 351 moves from the channel 343 to the locking point b, the distance between the stopping end 354 and the tail end of the clip feeding driving mechanism is gradually reduced until the stopping end abuts against the tail end of the clip feeding driving mechanism, so that the clip feeding driving mechanism is prevented from retreating; when the guide 351 exits the secondary channel 343 along the guide wall 345 and returns to the main channel 341, the jaw driving mechanism clamps, the stopping end 354 is always kept in contact with the tail end of the clip feeding driving mechanism to prevent the clip from retreating, so that the clip in the jaw assembly is ensured not to retreat all the time in the clamping process, and the clamping stability is ensured. Specifically, as shown in fig. 25-26, the secondary channel 343 extends from the open portion 342 of the primary channel 341 away from the pivot end 334 of the wrench, and the distance from the starting point a and the ending point to the pivot end 334 of the wrench is less than the distance from the locking point b to the pivot end 334 of the wrench.

As shown in fig. 26, the guide 351 has a first movement path when the wrench moves forward and a second movement path when the wrench reaches the closed position and moves to a reset position, the first movement path includes a master passage 341 and a slave passage 343, and the second movement path includes the master passage 341 and does not include the slave passage 343. The movement path is a path along which the guide 351 relatively moves. The movement path is the path formed by the channels reached in the movement. When the spanner reaches the closed position, the user unclamped the spanner, then the spanner is in the effect of spanner canceling release mechanical system towards open position motion that resets, during this, does not need any to stop, and second motion route shielding is followed passageway 343, avoids guide 351 entering to follow passageway 343 and is locked by stop point b when the motion that resets, has avoided the spanner locking mechanical system who plays important role in the forward motion to play the reverse action in the motion that resets promptly, has realized that one step of spanner resets to the end.

Further, as shown in fig. 29 to 33D, in order to realize the above-described slave channel 343, the clip applier further includes a path switching member 360 for switching the first movement path and the second movement path. The path switching member 360 is located in the housing 321, the path switching member 360 has two states, when the path switching member 360 is in the first state, the path switching member 360 leaves the slave channel 343 to allow the guide 351 to enter or exit the slave channel 343, and when the path switching member 360 is in the second state, the path switching member 360 blocks the guide 351 from entering the slave channel 343. The guiding member 351 is a cylinder extending along a radial direction and penetrates through the guiding channel 340, the guiding member 351 comprises a first part and a second part which are connected, the first part of the guiding member 351 is accommodated in the guiding channel 340, the second part is arranged outside the guiding channel 340 and protrudes out of the surface of the wrench main body 331320, when the first part of the guiding member 351 moves in the guiding channel 340, the second part correspondingly forms a moving space along with the movement of the first part, when the path switching member 360 blocks the first portion of the guide 351 from the opening portion 342 into the space routed from the channel 343, guide 351 may be prevented from entering slave channel 343, and need not block the entire slave channel 343, when the path switching member 360 blocks the second portion of the guide 351 into the activity space or into the pathway of the activity, the first portion of the guide 351 is prevented from entering the slave channel 343, i.e., the guide 351 is also prevented from entering the slave channel 343.

The guide 351 enters and exits the slave channel 343 from the opening portion 342 of the main channel 341, the opening portion 342 including a starting point 342a and an end point b, between which the inlet and outlet of the slave channel 343 are located, the starting point 342a being close to the starting point a of the main channel 341 and the end point b being close to the end point of the main channel 341. In one embodiment, when the wrench moves in the forward direction and the guide 351 is located at the starting point 342a of the opening portion 342 of the main channel 341, the path switching member 360 is in the first state, the guide 351 enters the slave channel 343, and the path switching member 360 is in the first state during the movement of the guide 351 from the channel 343 to the end point b of the opening portion 342, so that the guide 351 can smoothly enter and exit the slave channel 343 when the wrench moves in the forward direction; the wrench performs a reset motion after reaching the closed position, and the path switching member 360 is in the second state and maintains the second state at least until the guide 351 moves to the start point 342a of the opening portion 342 of the main channel 341 at least when the guide 351 is located at the end point b of the opening portion 342 of the main channel 341, so that the guide 351 cannot enter the sub channel 343 at all times during the reset motion. The state control logic of the path switching member 360 as described above needs to be designed based on the structure of the opening 342 in order to ensure the foundation for forming the first movement path and the second movement path.

In this embodiment, as shown in fig. 31A to 31D, the path switching member 360 has a state logic that is easy to implement, and during the time when the wrench moves in the forward direction and moves from the open position to before reaching the closed position, the path switching member 360 is in the first state, so that the guide member 351 can smoothly enter and exit the slave channel 343 during the forward movement; when the wrench moves forward and reaches the closing position, the path switching member 360 is switched from the first state to the second state, and when the wrench moves from the closing position to the intermediate position after reaching the closing position and performs the reset movement, the path switching member 360 is in the second state, so that the guide 351 cannot enter the slave channel 343 at all times during the reset movement from the closing position. The state control logic of the path switching piece 360 of the present embodiment controls the state of the path switching piece 360 based on the position of the wrench, achieving the same function and being more stable, and the design being simpler.

Further, the wrench reaches the closed position to start the reset movement, and when located at the open position, the path switching member 360 is in the first state. That is, during the reset movement of the wrench from the intermediate position to the open position, the path switching member 360 is switched from the second state to the first state. In this manner, the continuously applied clip applier, at the end of a cycle of use, the path switch 360 returns to the initial state for the next cycle of use to function properly

Therefore, in the process of the forward movement of the wrench, the path switching member 360 is in the first state at least when the guide 351 passes through the opening 342; during the reset movement of the wrench, the path switching member 360 is in the second state at least when the guide member 351 passes through the opening portion 342.

Further, to realize the state switching of the path switching member 360, the clip applier further includes a path driving member 370 disposed in the housing 321. The path switching member 360 is provided to one of the wrench and the main body 320, and the path driving member 370 is provided to the other of the wrench and the main body 320. Specifically, the path switching member 360 is provided to one of the wrench and the main housing 321 of the main body 320, and the path driving member 370 is provided to the other of the wrench and the main housing 321 of the main body 320. When the wrench moves forward or returns, the path switching member 360 is driven to move when the path driving member 370 abuts the path switching member 360, so that the path switching member 360 is switched between the first state and the second state. The movement of the wrench drives the path driving member 370, then drives the path switching member 360 to change its state, and finally returns to the switching of the movement path of the guiding channel 340 of the wrench itself, the movement of the wrench is the power source for switching the movement path of the wrench, so as to realize an internal circulation, which is simple and reliable, and does not need an additional power source to change the movement path.

When the wrench moves forward or returns, the path driving member 370 can selectively contact with or separate from the path switching member 360, and when the path switching member 360 is separated, the path switching member 360 ideally does not move and is in a fixed position and the state remains unchanged, and when the path switching member is contacted, the path switching member 360 moves and changes the position and the state possibly changes; in another embodiment, the path switch 360 may continue to move in abutment with the path driver 370, and when moved to a certain position, switching between the first state and the second state occurs.

Specifically, in this embodiment, as shown in fig. 29, the path switching member 360 includes a pivot portion 361, a trigger portion and an executing portion 363, the path switching member 360 performs a rotation motion with the pivot portion 361 as an axis, and the trigger portion includes a first trigger portion 362a and a second trigger portion 362b respectively disposed at two sides of the pivot portion 361; the path driver 370 is a guide rib including a first guide rib 371 and a second guide rib 372, the first guide rib 371 having a first guide slope 498372, the second guide rib 372 having a second guide slope 498374, the first guide rib 371 being located at a front side of the first trigger 362a, the second guide rib 372 being located at a rear side of the second trigger 362 b; when the first trigger 362a abuts against the first guide rib 371 and moves along the first guide slope 498372, the path switching member 360 rotates in the first direction, and the path switching member 360 switches from the first state to the second state; when the second trigger 362b abuts against the second guide rib 372 and moves along the second guide slope 498374, the path switching member 360 rotates in the second direction, and the path switching member 360 switches from the first state to the second state; when the path switching member 360 is in the first state, the actuator 363 moves away from the slave channel 343 to allow the guide 351 to enter or exit the slave channel 343, and when the path switching member 360 is in the second state, the actuator 363 blocks the guide 351 from entering the slave channel 343.

The path switching member 360 and the path driving member 370 are relatively moved during the forward movement of the wrench, and the front side and the rear side respectively mean that the first guide rib 371 is located at the front side in the relative movement direction of the path switching member 360 with respect to the path driving member 370 when the wrench is moved in the forward direction, and the second guide rib 372 is located at the rear side in the relative movement direction of the path switching member 360 with respect to the path driving member 370 when the wrench is moved in the forward direction.

As shown in fig. 30, in this embodiment, the pivot portion 361 is a rotating shaft 255 fixed in the horizontal pin hole 404 of the wrench main part, the first triggering portion 362a and the second triggering portion 362b are two plates extending from the rotating shaft 255, and are a first plate 362a ' and a second plate 362b ', respectively, and form an obtuse angle, and the actuating portion 363 is a rib connecting the first plate 362a '; the pivoting part 361 of the path switching member 360 is coupled to the wrench, particularly, a position on the wrench body 331320 near the slave channel 343, an obtuse angle of the first plate 362a 'and the second plate 362 b' is toward the inside of the main housing 321, the guide rib is provided on the inside of the main housing 321, and the inclined surface 498 of the first guide inclined surface 498372 and the second guide inclined surface 498374 is toward the wrench body 331320. In other embodiments, the first plate 362a 'and the first plate 362 a' may be at an acute or right angle.

The arrangement of the path switching member 360 and the aforementioned front and rear sides of the path driving member 370 is such that the path switching member 360 selectively comes into abutment with or disengages from the path switching member 360 when the wrench is moved in the forward direction or the return movement. The positions of the wrench also include a first adjacent position proximate the closed position between the intermediate position and the closed position, and a second adjacent position proximate the open position between the open position and the intermediate position. Specifically, the movement process of the path switching member 360 and the path driving member 370 shown in fig. 33A to 33D is as follows: at the initial time, the wrench is located at the open position, and the path switching member 360 is located at the first position with respect to the pivoting portion 361 thereof, is in the first state, and is disengaged from the first guide rib 371; during the period before the wrench moves forward and moves from the open position to the first adjacent position, the path switching member 360 moves along with the wrench around the pivot end 334 of the wrench, the first triggering part 362a gradually approaches the first guide rib 371, and the path switching member 360 does not move in the first direction or the second direction relative to the pivot part 361 thereof, and is still located at the first position and in the first state; at the time when the wrench moves forward and reaches the first adjacent position, the path switching member 360 starts to abut against the first guide slope 498372 of the first guide rib 371, and the path switching member 360 remains in the first position and in the first state; the wrench continues to move in the forward direction, and during the period before moving from the first adjacent position to the closed position, the first trigger part 362a of the path switching member 360 moves along the first guide slope 498372, and the path switching member 360 rapidly rotates toward the first direction, out of the first position, but still in the first state; when the wrench reaches the closing position, the path switching member 360 rotates by a total angle a in the first direction from the first position, the path switching member 360 is located at the second position with respect to the pivot portion 361 thereof, and the path switching member 360 is switched from the first state to the second state; during the reset movement of the wrench from the closed position to the second adjacent position, the path switching member 360 moves along with the wrench around the pivot end 334, the second triggering portion 362b gradually approaches the second guiding rib 372 and is disengaged from the first guiding rib 371, and the path switching member 360 does not move in the first direction or the second direction relative to the own pivoting portion 361, and remains in the second position and the second state; at the moment the wrench is reset to move and the second adjacent position is reached, the path switching member 360 starts to abut against the second guide slope 498374 of the second guide rib 372, and the path switching member 360 is still in the second position and in the second state; the wrench continues the reset movement, during the period before moving from the second adjacent position to the open position, the second trigger part 362b of the path switching member 360 moves along the second guide slope 498374, and the path switching member 360 rapidly rotates toward the second direction, out of the second position, but still in the second state; at the moment the wrench reaches the open position, the path switching member 360 is rotated by a total of a degrees in the second direction from the second position, the path switching member 360 returns to the first position again, and the path switching member 360 is switched from the second state to the first state. The first guide rib 371 and the second guide rib 372 have short lengths, so that the rapid rotation of the angle a is realized, the rapid switching between the first state and the second state is realized, the structure is simple, the cost is low, and when the path switching piece 360 is separated from the path driving piece 370, the path switching piece 360 has a stable position and a stable state, and the state of the clip applier is more stable.

In other embodiments, different from this embodiment, the position of the wrench further includes a third proximity position and a fourth proximity position between the open position and the middle position, the fourth proximity position is closer to the open position, the wrench reset movement is before reaching the third proximity position, the second triggering portion 362b is in a disengaged state with the second guiding rib 372, the position, movement and state of the specific path switching member 360 are not described in detail above, during the wrench moving from the third proximity position to the fourth proximity position, the second triggering portion 362b abuts against the second guiding rib 372 and rotates along the second guiding slope 498374 in the second direction, and when the wrench moving from the fourth proximity position, the path switching member 360 achieves returning to the first position and the first state, which is described above; and during the subsequent movement of the wrench from the fourth adjacent position to the open position, the second guide rib 372 is in the disengaged state from the path switching member 360, and the path switching member 360 is maintained in the first position and the second state. In this way, it is likewise possible to achieve a return of the path switch 360 to the initial state in order to function properly in the next cycle of use of the continuously applied clip applier.

In this embodiment, the clip applier further includes a positioning mechanism, as shown in fig. 32, the positioning mechanism includes a first positioning member 381 and a second positioning member 382, the first positioning member 381 is disposed on the pivot portion 361 of the path switching member 360, when the path switching member 360 moves to the first direction or the second direction by taking the pivot portion 361 as the rotation axis 255, the first positioning member 381 moves synchronously by taking the pivot portion 361 as the rotation axis 255, the second positioning member 382 includes a first concave notch 383, a second concave notch 384 and a convex 440 portion 385 located between the first concave notch 383 and the second concave notch 384 which are disposed on the wrench, one of the first positioning member 381 and the convex 440 portion 385 is an elastic element, when the first positioning member 381 is located in the first concave notch 383, the path switching member 360 is in the first state; when the second positioning member 382 is located in the second recess 384, the path switching member 360 is in the second state. In such a positioning mechanism, the first positioning member 381 can only be fixed to the first indentation 383 or the second indentation 384, and cannot be located at other positions, so that the path switching member 360 can only be located at two fixed positions with respect to the pivot portion 361 thereof, such as the first position and the second position, and the path switching member 360 is in the first state in the first position and the path switching member 360 is in the second state in the second position.

The first positioning member 381 is located in the first recess 383, when the user operates the wrench to rotate the path switching member 360 in the first direction, the first positioning member 381 also rotates in the first direction, the first positioning member 381 abuts against the protrusion 440 385, and since one of the first positioning member 381 and the protrusion 440 is an elastic element, the first positioning member 381 can be compressed, and the first positioning member 381 can smoothly pass over the protrusion 440 385 to enter the second recess 384; assuming that the user stops operating the wrench on the way past the projection 440 385, the first positioning member 381 can also return to the first recess 383 under the reaction force of the elastic member. Similarly, the first positioning element 381 smoothly enters the first recess 383 from the second recess 384 over the protrusion 385 of the projection 440, and will not be described in detail.

According to the above, the path switching member 360 and the path driving member 370 can be in a disengaged state, if the above-mentioned positioning mechanism is not provided, the path switching member 360 can move freely relative to the pivot portion 361 thereof, when the clip applier is shaken or shaken, the path driving member 370 can freely rotate in the first direction or the second direction, so that the clip applier accidentally enters the second state during the first state, and the first moving path of the forward movement and the second moving path of the return movement of the clip applier are broken and cannot be used normally during the first state and the second state. Therefore, the above-mentioned positioning mechanism prevents the path switching member 360 from being moved accidentally, and ensures a normal movement path of the clip applier.

The first positioning member 381 may be a first rib 436 protruding from the pivot portion 361 away from the obtuse angle, and the protrusion 440 may be a second rib 436. In other embodiments, the elastic element may be a metal rod of the C-shaped protrusion 440, which has elasticity.

In this embodiment, the jaw assembly has a design that stably guides, clamps and compresses the first clip, as described in detail below.

The jaw assembly includes a first jawarm and a second jawarm. The first jawarm has the same structure as the second jawarm, and the present invention focuses on the structure of the first jawarm. As shown in fig. 34, the first jawarm includes a base, a first side, and a second side, the base, the first side, and the second side being such that the first jawarm is generally U-shaped in cross-section. The first side portion comprises a first guide portion and a first containing portion, the first guide portion and the first containing portion are arranged on the inner wall of the first side portion, the second side portion comprises a second guide portion and a second containing portion, and the second guide portion and the second containing portion are arranged on the inner wall of the second side portion. The bottom is positioned between the first guide part and the second guide part, and a gap is formed between the first accommodating part and the second accommodating part. The first guide part and the second guide part have the same structure, and the first accommodating part and the second accommodating part have the same structure. The first guide portion includes a guide surface, at least a second portion of which is generally arcuate. The guide surface includes a first portion flush with the upper surface of the base and a second portion higher than the upper surface of the base, the second portion being formed by the first portion extending in a generally arcuate direction, the first portion smoothly transitioning with the second portion. The first accommodating part is positioned far away from the first guide part and is a recess. The first receiving portion includes a proximal face and a distal face, the proximal face meeting with the second portion of the guide surface and the meeting forming a rounded corner. The intersection is distal of the second portion.

The jaw assembly also includes a stop. The stop parts are four in number, are arranged on the first clamp arm and the second clamp arm and are respectively matched with the first guide part and the second guide part of the first clamp arm and the two guide parts of the second clamp arm. The four stopper members have the same structure, and the first stopper member engaged with the first guide portion is taken as an example to explain the structure thereof. As shown in fig. 34-38, the first stopper is positioned above the first guide portion, the first stopper includes a base portion and a movable portion, the movable portion includes an end portion and an intermediate portion, and the intermediate portion is positioned between the end portion and the base portion. The base portion is larger in size than the middle portion and the end portions, and the base portion is engaged in a groove provided in the first side portion, so that the base portion is fixed to the first side portion. The middle portion and the end portion are both located inside the inner wall of the first side portion. The movable part can move in the up and down directions. Therefore, the first guide part and the first stop part jointly form a guide space of the clamp. The first and second clamp arms have three guide spaces in the same structure. The first clamp arm and the second clamp arm have four guide spaces in total, and are matched with the four protruding parts of the clamp in a one-to-one correspondence mode. In an initial state, the first stopper does not engage with the projection of the clip, and a distance between the second portion of the guide surface and the first stopper decreases in a direction toward the distal end of the guide surface. The distance is minimized between the intersection and the first stop. The distance may be determined, for example, by a minimum distance from the lower surface of the first stop member at a point along the second portion, the minimum distance decreasing in a direction towards the distal end of the guide surface.

The stopper has elasticity, including the following two ways. In one aspect of the present embodiment, the stopper is made of a resilient material, including but not limited to metal, so that the stopper tends to maintain its original position. In another form of the other illustrated embodiment, at least a portion of the stop member is attached to the jawarms, and the jawarms are further provided with a torsion spring having one end attached to the jawarms and the other end attached to the stop member such that the stop member has a tendency to approach the guide surface. The stopper member has elasticity so that the protruding portion of the clip is restrained by the stopper member in the guide space, thereby allowing the clip to be held in the guide space during the movement toward the distal direction, and further allowing the clip to be gradually spread. On the basis that the stop piece has elasticity, the stop piece includes base and movable part, and movable part can move up and down, including two kinds of modes: in one mode of the present embodiment, the base portion is connected to the caliper arm, and the movable portion is movable up and down due to elasticity of the stopper; in another form of the other embodiment shown, the base portion is pivotally connected to the jawarms, the movable portion is also pivotal to move upwardly and downwardly, and the torsion spring has one end connected to the jawarms and the other end connected to the movable portion such that the movable portion has a tendency to move closer to the guide surface. The movable part can move up and down, and can provide space for the protruding part to smoothly leave the guide space and enter the accommodating part.

The maximum size of the first projection 36 is substantially the same as the maximum size of the second projection 37, and the shape of the first projection 36 may be the same as or different from that of the second projection 37, whereby the first projection 36 and the second projection 37 can be applied to substantially the same guide space. It should be noted that the first protruding portion 36 may be set to have a different size from the second protruding portion 37, even the two first protruding portions 36 may be set to have a different size, or the two second protruding portions 37 may be set to have a different size, and in this case, the guide space for the protruding portions may be appropriately changed, that is, the relative positions, shapes, and/or sizes of the guide portion and the stopper may be appropriately changed.

In a state where the jaw assembly is opened, that is, in a state where the jaw assembly is opened to the bottom, the clip is pushed to move distally by the clip feeding driving mechanism so as to enter the jaw assembly from the clip box 220, the first projecting portion and the second projecting portion of the clip enter the corresponding guide spaces, respectively, and move distally in the corresponding guide spaces until the clip is located at the distal end of the jaw assembly, and at least a part of the first projecting portion and at least a part of the second projecting portion enter the accommodating portion and are accommodated in the accommodating portion, respectively. The first projection and the second projection are each guided by the guide portion, thereby moving along the guide surface under the restraint of the stopper, so that the clip moves in a desired direction. Prior to feeding the jaw assembly, the clip is stored in the clip magazine 220, limited by the size and internal space of the clip magazine 220, and is stored in a partially compressed state, wherein the clip is in an incompletely opened state, and wherein the partial compression causes the clip to return to its original, i.e., opened, shape after being disengaged from the sleeve 210. Compressed means that the two arms of the clip are close to each other but not engaged. Since the clip will last for a period of time from assembly to cartridge 220 until use, this period of time is compressed, which tends to keep the clip in a compressed shape. The first and second projections are also constrained by the stop member such that they overcome the above-described tendency to retain their compressed shape during movement distally within the guide space, and such that the first and second arms of the clip gradually open during movement distally until they return to their original shape or conform to the angle at which the jaw assembly opens. The clamp restores its original shape or is consistent with the opening angle of the jaw assembly, so that the clamping space between the two clamping arms of the clamp is maximized, and the tissue to be clamped is conveniently accommodated in the clamping space. In the initial state, the projection of the clip does not enter the guide space and is thus not constrained by the stop, at which point the distance between the second portion of the guide surface and the corresponding stop decreases in the direction towards the distal end of the guide surface until the distance between the distal end of the second portion (i.e. the distal end of the guide surface) and the stop reaches a minimum. Since the distance decreases in the direction toward the distal end of the guide surface, the first and second projecting portions of the clip gradually approach the outlet of the guide space (i.e., the intersection) and the inlet of the receiving portion in the process of moving toward the distal end of the guide surface, thereby enabling the first and second projecting portions to smoothly enter the receiving portion. The distance decreases in a direction towards the distal end of the guide surface, for example by at least a second portion of the guide surface being substantially arcuate. The first and second projecting portions are more and more restrained by the stopper during the movement thereof to the distant side in the guide space, so that the projecting portion of the clip is more restrained by the second portion of the guide surface while being guided by the stopper, the moving speed of the projecting portion of the clip is suppressed, and the projecting portion is prevented from crossing over the entrance of the accommodating portion due to an excessive speed after leaving the guide space and thus from not entering the accommodating portion. Further, after the first and second protrusions reach and cross the intersection (i.e., the intersection where the proximal surface of the receptacle meets the second portion of the guide surface), they do not continue to move in the original direction without entering the receptacle under the constraint of the stop. The first protruding part and the second protruding part enter the accommodating part after crossing the intersection, and at the moment, the clamp moves to the position to be in the preparation position, and the clamp feeding is completed. Since the movable portion of the stop member is movable up and down, the movable portion of the stop member, while restraining the protrusion of the clip by the stop member, may give room for the protrusion of the clip by moving so that it may leave the guide space and enter the receiving portion while being restrained, in the case where the distance between the second portion of the guide surface and the corresponding stop member decreases in the direction toward the distal end of the guide surface. The restraint of the stopper to the projection may be achieved, for example, by the stopper abutting the projection. At least a portion of the first tab and at least a portion of the second tab are received in the receiving portion, respectively, such that the clip remains positionally stable during closure of the jaws, i.e., during application of the clip. Further, the accommodating part is a recess, which helps the first protruding part and the second protruding part of the clip to be continuously kept in the accommodating part and not to be easily separated. Further, the first protruding portion and the second protruding portion accommodated in the accommodating portion are both subjected to a force applied by the stopper abutting against them, so that the first protruding portion and the second protruding portion are more stably held in the accommodating portion. The force may be, for example, a generally downward and upward force, or a generally distally directed force, which is related to the location where the stop abuts the projection. The positions of the first protruding part and the second protruding part are stable, so that the clip keeps stable in the closing process of the jaws, and the clamping effect is ensured. It should be noted that the present invention further includes a clip feeding and retaining mechanism for preventing the clip feeding driving mechanism from backing up and further preventing the clip from backing up, and the receiving portion and the stopper function to stabilize the position of the clip at the distal end of the jaw assembly for smooth clip application.

Subsequently, the jaw assembly is closed, and the first and second clamp arms approach each other until a closing stroke end point is reached, at which time the jaw assembly completes closing. During the closing process of the jaw assembly, if the first protruding part and/or the second protruding part are not accommodated in the accommodating part, the clamp arm cannot apply force to at least one protruding part through the accommodating part, the clamp can be twisted or separated from the correct position, the two clamp arms cannot be clamped, and the clamping is failed. At least one part of the first protruding portion and at least one part of the second protruding portion are both accommodated in the accommodating portion, so that the first clamping arm and the second clamping arm are close to each other by the first clamping arm and the second clamping arm driving the second clamping arm to rotate around the connecting portion in the closing process of the jaw assembly, and finally the first clamping portion of the first clamping arm is clamped to the second clamping portion of the second clamping arm, so that the first clamping arm and the second clamping arm are fixed to each other. The stable clip retention position during closure of the jaw assembly prevents undesirable movement or twisting of the clip which can result in a snap failure and a grip failure. After the protruding portions are accommodated in the accommodating portion, the two first protruding portions are abutted by the stoppers, and the two second protruding portions are also abutted by the stoppers, so that the protruding portions are further ensured to be accommodated in the accommodating portion and not to be separated from the accommodating portion.

In another embodiment, the first jawarm is not identical in structure to the second jawarm. The first jawarm is constructed as in the previous embodiment. The second jawarm differs structurally from the first jawarm in that a first portion of the guide surface of the first guide portion of the second jawarm includes a travel extension structure, as does a first portion of the guide surface of the second guide portion of the second jawarm. Preferably, the stroke extension structure is a dimple. The stroke extension structure enables the stroke of the first clamping arm of the clamp to be long, the distance of the second clamping arm moving towards the far side is larger than the distance of the first clamping arm moving towards the far side in the same time, therefore, the clamp rotates along the anticlockwise direction in the figure 39 in the moving process, the first protruding portion and the second protruding portion of the clamp are located on the same vertical line, the state that the first protruding portion and the second protruding portion are not located on the same vertical line when the clamp is compressed is changed, the phenomenon that the clamp is unevenly stressed in the moving process and moves unsmoothly is avoided, and the impact caused by the fact that the first protruding portion of the first clamping arm enters the accommodating portion in advance is also avoided. It should be noted that when an asymmetrical clip is compressed in the clip magazine 220, the first projection of the first clip arm is distal to the second projection of the second clip arm due to the difference in curvature between the two clip arms. In this embodiment, the first portion of the guide surfaces of the first and second guide portions of the second jawarm, excluding the stroke extension structure, may be flush with the upper surface of the base.

The clip applier further comprises a first resilient element. As shown in fig. 41-42, each of the first and second jawarms includes a receiving slot, which is a through slot, for receiving the clip feeding driving mechanism, in particular, the clip feeding block 231 and a portion of the elastic push rod 232 of the clip feeding driving mechanism, when the jaw assembly is closed, so as to avoid interference between the first and second jawarms and the clip feeding driving mechanism when the jaw assembly is closed. The proximal end of the first jawarm has a projection, the cassette 220 has a hole 404, and the projection is received in the hole 404 such that the proximal end of the first jawarm is pivotally connected to the distal end of the cassette 220, the proximal end of the second jawarm is pivotally connected to the distal end of the cassette 220, and the first resilient member has one end connected to the proximal end of the first jawarm and the other end connected to the proximal end of the second jawarm. The proximal end of the first forceps arm and the proximal end of the second forceps arm are separated from each other by the elastic force of the first elastic element, so that the first forceps arm and the second forceps arm are kept in an opened state (a bottom-opened state of the jaw assembly). The proximal ends of the first and second jawarms are each disposed within a sleeve 210, as shown in fig. 42, and the distal end of the sleeve 210 engages the lower surface of the first jawarms and the upper surface of the second jawarms. Cannula 210 is driven to move by the jaw drive mechanism, and the distal end of cannula 210 moves therewith. As the distal end of sleeve 210 is moved distally, the distal end of sleeve 210 engages the lower surface of the first jawarm and the upper surface of the second jawarm, driving the first and second jawarms to pivot so that they are brought closer together and closing of the jaw assembly is achieved. After the jaw assembly is closed, the first elastic element is compressed to store energy. As the sleeve 210 moves proximally, the distal end of the sleeve 210 moves proximally, the energy stored by the compressed first resilient member is released, and the resilient force of the first resilient member causes the proximal ends of the first and second jawarms to move away from each other, thereby causing the first and second jawarms to open. The opening of the jaw assembly is realized by utilizing the first elastic element, and the complex mechanism is avoided being adopted to realize the functions. Preferably, the first elastic element is a U-shaped spring, and after being compressed, two arms of the U-shaped spring approach each other to realize energy storage. The U-shaped spring occupies a smaller space, and the elasticity of the U-shaped spring is larger than that of a common spring. The above opening means the same as opening.

It should be noted that the distal direction may be a direction generally facing the distal direction, including the longitudinal direction, and also including a direction at an angle to the longitudinal direction.

Referring to fig. 43 to 45, a second embodiment of the present invention is shown, which is similar to the first embodiment, and this embodiment relates to a clip applier.

Compared with the first embodiment, the present embodiment is different from the driving member selectively driving the clip feeding driving mechanism or the clip pushing driving mechanism under the action of the actuating member 330; in the first state, the driving piece is separated from the pushing and clamping driving mechanism and is combined with the clamp conveying driving mechanism to drive the clamp conveying driving mechanism to move; and in the third state, the driving piece is separated from the clamp conveying driving mechanism and is combined with the clamp pushing driving mechanism to drive the clamp pushing driving mechanism to move. In the embodiment, when the driving piece drives the clamp conveying driving mechanism to move, the clamp pushing driving mechanism does not retreat to store energy, but does not move at the initial position and does not move; therefore, the asynchronous clamping and pushing action can be effectively ensured, and the interference can not occur. Compared with the first embodiment, the overall structure of the clip applier is simpler while the safety and reliability of the clip applier can be effectively ensured.

The jaw driving mechanism is sleeved on the clamp feeding driving mechanism and the clamp pushing driving mechanism and used for driving the jaw assembly to close; in the third state, the driving piece is simultaneously combined with the jaw driving mechanism and the clamp pushing driving mechanism so as to drive the jaw driving mechanism and the clamp pushing driving mechanism to synchronously move. In this embodiment, the transmission mechanism has no second state compared to the first embodiment, since the jaw driving mechanism and the push-clamp driving mechanism move synchronously. The clamp feeding driving mechanism comprises a clamp feeding driving pipe 402 and a clamp feeding assembly connected with the clamp feeding driving pipe 402, the clamp feeding driving pipe 402 drives the clamp feeding assembly to move so as to drive a clamp to enter the jaw assembly, and the specific structure is the same as that described above; the jaw driving mechanism comprises a jaw driving pipe 432 and a sleeve 210 connected with the jaw driving pipe 432, and the specific structure is the same as that described above; the push clamp driving mechanism comprises a push clamp driving pipe 459 and a push clamp driving member connected with the push clamp driving pipe 459, the push clamp driving member is provided with a plurality of side cavities 252 at intervals along the longitudinal direction, each side cavity 252 is correspondingly provided with a push clamp block 253, the push clamp driving member drives the push clamp blocks 253 to move, in the embodiment, the push clamp driving member is a push clamp rod 251, and the specific structure of the push clamp rod 251 is the same as that described above. The structure of the driving member is the same as that of the switching mechanism described above or below, and will not be described herein. In order to make the overall structure more compact, the push-clamp driving tube 459 is sleeved on the push-clamp driving tube 402, the push-clamp driving tube 459 is coaxial with the push-clamp driving tube 402, the push-clamp assembly and the push-clamp driving member are located at two sides of the clamp box 220, specifically, the push-clamp assembly is located at the outer side of the clamp box 220, and the push-clamp driving member is located at the inner side of the clamp box 220. In order to realize the simultaneous combination of the driving member with the jaw driving mechanism and the clip pushing driving mechanism, the proximal end of the clip pushing driving tube 459 is flush with the proximal end of the jaw driving tube 432, and the distal end surface 508 of the driving member is combined with the proximal end surface 502 of the driving member and the proximal end surface 502 of the jaw driving tube 432 to push them to move synchronously.

Of course, in another embodiment, in the third state, the driving member drives the clip pushing driving mechanism to move to be combined with the jaw driving mechanism, and then drives the jaw driving mechanism and the clip pushing driving mechanism to move synchronously. The jaw driving mechanism is sleeved on the feeding clamp driving mechanism and the pushing clamp driving mechanism, and in an initial state, the distance from the near end of the pushing clamp driving tube 459 to the far end of the driving piece is smaller than the distance from the near end of the jaw driving tube 432 to the far end of the driving piece. Similarly, in order to make the overall structure more compact, the push clamp driving tube 459 is sleeved on the feed clamp driving tube 402.

The jaw drive mechanism further includes a second restoring member 446, such as a resilient member. The elastic element is sleeved outside the jaw driving pipe 432, one end of the elastic element is abutted with a baffle 434 on the outer surface of the jaw driving pipe 432, the other end of the elastic element extends forwards and is abutted with the inner wall of the shell 321 of the clip applier, the elastic element is used for storing energy when the jaw driving mechanism advances, and the elastic element recovers deformation and releases the energy so as to provide power for resetting of the jaw driving mechanism. The push clamp drive mechanism further includes a third reset member 456, such as an elastomeric member. One end of the elastic element is abutted with the inner wall of the shell 321 of the clip applier, the other end of the elastic element extends backwards and is abutted with the distal end surface 508 of the push clip driving tube 459, the elastic element is used for storing energy when the push clip driving mechanism advances, and the elastic element recovers deformation to release the energy so as to provide power for resetting of the push clip driving mechanism. The clip feed drive mechanism also includes a first reset member 418, such as an elastomeric member. One end of the elastic element is abutted with the convex rib 436 on the inner wall of the push clamp driving tube 459, the other end of the elastic element extends backwards and is abutted with the distal end surface 508 of the clamp delivery driving tube 402, the elastic element is used for storing energy when the clamp delivery driving mechanism advances, and the elastic element recovers deformation and releases the energy so as to provide power for the reset of the clamp delivery driving mechanism.

In the following, in the third state, the driving member is simultaneously combined with the jaw driving mechanism and the clip pushing driving mechanism, and the working process of clip feeding, jaw assembly closing and clip pushing of the clip applier is described by taking the synchronous motion of the jaw driving mechanism and the clip pushing driving mechanism as an example:

the operator presses actuator 330 to move actuator 330 from the open position toward the neutral position, and the actuator 330 causes the driver to advance the clip advancing drive mechanism, such that the proximal end of the clip advancing drive tube 402 and the distal end of the driver are gradually moved toward the proximal end of the jaw drive tube 432 and toward the clip pushing drive tube 459; when the actuator 330 moves to the neutral position, the guide of the driver moves to the second guide surface 496 in the housing 321, the latch 482 disengages from the catch of the clip feed drive tube 402, the driver disengages from the clip feed drive mechanism, the forward stroke of the clip feed drive mechanism is complete, the clip at the distal end of the clip magazine 220 is fed into the jaw assembly (clip feed action is complete), and the distal surface 508 of the driver abuts the proximal surface 502 of the jaw drive tube 432 and the proximal surface 502 of the push-clip drive tube 459. The retaining end 354 of the clip feed retaining mechanism is capable of abutting the clip feed drive tube 402 after the switching mechanism is separated from the clip feed drive mechanism to prevent the clip in the jaw assembly from backing up due to the backing up of the clip feed drive mechanism. Continuing to press the actuator 330, the actuator 330 moves from the intermediate position toward the closed position, and the clip feeding retaining mechanism gradually disengages from the clip feeding driving pipe 402; the driving member pushes the jaw driving mechanism and the clip pushing driving mechanism forward under the action of the actuating member 330, the jaw driving tube 432 drives the sleeve 210 to advance to close the jaw assembly, the clip pushing driving mechanism advances to advance the rest of the clips in the clip box 220 by one station, when the actuating member 330 moves to the closing position, the jaw assembly is closed (the jaw closing action is completed) and the rest of the clips in the clip box 220 all advance by one station (the clip pushing action is completed), the clip feeding stopping mechanism is completely separated from the clip feeding driving tube 402, and the clip feeding driving tube 402 is reset under the action of the first resetting member 418. The actuator 330 is released, the jaw drive mechanism is reset by the second reset member 446, and the push-clamp drive mechanism is reset by the third reset member 456. In other words, during the operation, the switching mechanism is first separated from the jaw driving mechanism and the clip pushing driving mechanism, and then is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move, and then is separated from the clip feeding driving mechanism, and is simultaneously combined with the jaw driving mechanism and the clip pushing driving mechanism to drive the jaw driving mechanism and the clip pushing driving mechanism to move synchronously.

As will be described in detail below, the present invention is directed to the operation of the clip applier wherein three drive mechanisms are actuated by a single actuator 330.

The switching mechanism is respectively connected with the clamp feeding driving mechanism, the jaw driving mechanism and the clamp pushing driving mechanism; the switching mechanism abuts against the actuating member 330 for receiving power; under the action of the actuating piece 330, the switching mechanism drives the clamp feeding driving mechanism to execute clamp feeding action, drives the jaw driving mechanism to execute jaw closing action and drives the clamp pushing driving mechanism to execute clamp pushing action according to a preset sequence; the number of the actuating members 330 is one.

The advantage of this design is that the surgeon operates one actuator 330 to act on the switching mechanism through the actuator 330 and thus on three different drive mechanisms, namely the clip feeding drive mechanism, the jaw drive mechanism and the clip pushing drive mechanism, so that the three different drive mechanisms can perform corresponding actions in a predetermined sequence. That is, the doctor can complete the three actions of the clamp feeding action, the jaw closing action and the clamp pushing action by operating one actuating piece 330, and the three actions meet the preset sequence, so that the problem of mutual interference can not occur, the safety and the smoothness of the doctor operation can be ensured, and the operation is simple and is user-friendly.

According to the working mode of the clip applier, the three actions of closing the jaws, delivering the clips and pushing the clips cannot be performed simultaneously, and in the embodiment, the three actions are performed in a preset sequence that the delivering and clamping actions are performed earlier than the closing and pushing actions of the jaws. That is to say, the clip feeding action is executed first, the jaw closing action and the clip pushing action are executed later, and the sequence relation of the three actions can be that the clip feeding action is executed first, the jaw closing action is executed later and then the clip pushing action is executed in the first implementation; the clamp feeding action is executed first, then the jaw closing action and the clamp pushing action are executed in the second embodiment, wherein the jaw closing action and the clamp pushing action can be synchronously executed, or the clamp pushing action is executed first and then the jaw closing action and the clamp pushing action are synchronously executed. Specifically, as can be seen from the description of the first embodiment, the push-clamp driving mechanism is connected to the switching mechanism through the adapting mechanism, and the moving directions of the push-clamp driving mechanism and the switching mechanism are opposite; the actuating piece 330 is pressed, the switching mechanism is firstly separated from the jaw driving mechanism under the action of the actuating piece 330, is combined with the clamp feeding driving mechanism to drive the clamp feeding driving mechanism to advance so as to execute clamp feeding action, is separated from the clamp feeding driving mechanism, and is combined with the jaw driving mechanism to drive the jaw driving mechanism to advance so as to execute jaw closing action; when the switching mechanism drives the clip feeding driving mechanism and the jaw driving mechanism to advance, the adapting mechanism is driven to move simultaneously to drive the clip pushing driving mechanism to retreat and store energy; the push-clamp drive mechanism includes a third reset 456 for storing this energy; the actuator 330 is released and the pinch drive mechanism is advanced by the third reset member 456 to perform a pinch motion. Regarding the structure of the switching mechanism, the clip feeding driving mechanism, the jaw driving mechanism and the clip pushing driving mechanism, the positional relationship, the connection relationship, the movement relationship, etc. are the same as those of the first embodiment, and are not described herein again.

As can be seen from the description of the second embodiment, under the action of the actuating element 330, the switching mechanism is first separated from the jaw driving mechanism and the clip pushing driving mechanism, and is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move, and then is separated from the clip feeding driving mechanism, and is simultaneously combined with the jaw driving mechanism and the clip pushing driving mechanism to drive the jaw driving mechanism and the clip pushing driving mechanism to move synchronously; or the switching mechanism is firstly separated from the jaw driving mechanism and the push-clamp driving mechanism, is combined with the feed-clamp driving mechanism to drive the feed-clamp driving mechanism to move, is then separated from the feed-clamp driving mechanism, is combined with the push-clamp driving mechanism to drive the push-clamp driving mechanism to move to be combined with the jaw driving mechanism, and then drives the jaw driving mechanism and the push-clamp driving mechanism to move synchronously. Regarding the structure of the switching mechanism, the clip feeding driving mechanism, the jaw driving mechanism and the clip pushing driving mechanism, the positional relationship, the connection relationship, the movement relationship, etc. are the same as those of the third embodiment, and are not described herein again.

In addition, the structure of the actuating member 330 is the same as that described above, and is not described herein again.

Referring to fig. 46 to 50, a third embodiment of the present invention is shown, which is similar to the previous embodiments, and this embodiment relates to a clip applier.

The present embodiment is different from the foregoing embodiment in the structure of the first clutch mechanism of the switching mechanism. In this embodiment, the difference in elevation of different portions of the guide track is used to force the first clutch member to flip over to engage different drive mechanisms to effect switching between different clip feeding actions and jaw closing actions. The first clutch member includes a pivot block 514, the clutch switching mechanism is the same as the above, a first groove 314524 is provided at the proximal end of the clip feeding driving mechanism, and the pivot block 514 is matched with the first groove 314524, so that the first clutch member is combined with the clip feeding driving mechanism. The second clutch is a distal face 508 of the body of the switching mechanism. The pivot block 514 is pivotally disposed on the body of the switching mechanism, the pivot block 514 includes a block body 516, a first engaging recess 518 at a lower end of the block body 516, and a first rotating shaft 520255 at a rear end of the block body 516, the pivot block 514 is pivotally connected to the switching mechanism body 500 via a first rotating shaft 520255, a hole 404 for installing a guide post 490 is disposed at an upper end of the pivot block 514, and the pivot block 514 is slidably engaged with a guide rail in the housing 321 via the guide post 490. The first clutch also includes a spring plate 522 disposed above the first guide surface 494, the spring plate 522 imparting a downward force to the guide post 490 so that the first clutch can better engage the pinch drive mechanism. Initially, the first engagement notch 518 of the pivot block 514 remains engaged with the first groove 314524 of the clip feed drive mechanism, the actuator 330 drives the switching mechanism forward, the pivot block 514 advances and drives the clip feed drive mechanism to move distally for the clip feed action, and when the guide post 490 moves along the ramp 498 to the second guide surface 496, the pivot block 514 flips upward about the first pivot axis 520255 to lift the first engagement notch 518 off of the first groove 314524, i.e., away from the clip feed drive tube 402, whereupon the distal surface 508 of the body of the switching mechanism engages the proximal end of the jaw drive mechanism, driving the jaw drive mechanism to move to perform the jaw closing action. Of course, it is contemplated that the angle at which the pivot block 514 is flipped can also be adjusted such that when the first snap notch 518 of the pivot block 514 disengages the first groove 314524 on the clip feed drive tube 402, the first snap notch 518 engages the proximal end of the jaw drive mechanism, thereby driving the jaw drive mechanism in motion.

Referring to fig. 51 to 54, a fourth embodiment of the present invention is shown, which is similar to the previous embodiments, and this embodiment relates to a clip applier.

This embodiment is different from the foregoing embodiment in the structure of the switching mechanism. In the present embodiment, the switching mechanism does not include a moving member and a moving guide, and the switching mechanism includes a rotating arm 526 pivotably disposed on the switching mechanism body 500, wherein the rotating arm 526 includes a rotating arm body 528, a second engaging recess 530 located at a lower end of the rotating arm body 528, and a second rotating shaft located at a rear end of the block body 516, the rotating arm 526 is pivotally connected to the switching mechanism body 500 through the second rotating shaft, and the switching mechanism body 500 is sleeved on the feeding clamp driving mechanism. In the initial state, the second clamping notch 530 of the rotating arm 526 is engaged with the second groove 534 of the clamp feeding driving mechanism; the actuator 330 drives the switching mechanism to move forward to drive the clip feeding driving mechanism to move distally for clip feeding, when the rotating arm 526 moves to the proximal end of the jaw driving mechanism, the switching mechanism is driven continuously, the inclined surface 498 of the rotating arm 526 is turned upwards under the guidance of the proximal guiding surface of the jaw driving mechanism, so that the second clamping notch 530 of the rotating arm 526 is disengaged from the second groove 534, and the distal surface 508 of the switching mechanism moves to be combined with the jaw driving mechanism, thereby driving the jaw driving mechanism to move forward. The advantage of designing like this has simplified the structure of switching mechanism for overall structure is compacter.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A clip applier comprising a jaw assembly, an operating assembly, and a shaft assembly extending from said operating assembly;

the rod body component comprises a clamp box, a clamp feeding component and a push clamp component,

the clip box comprises a first end connected to the jaw assembly and a second end opposite to the first end, the clip box contains N clips, N is more than or equal to 2, and the N clips comprise a first clip, a second clip and an Nth clip which are sequentially arranged from the first end to the second end;

the clip feeding assembly is used for abutting and pushing the first clip to move forwards to enter the jaw assembly;

the clamp pushing assembly is used for abutting against and pushing the second clamp to the Nth clamp to move forwards, the clamp comprises a first clamp arm, a second clamp arm and a connecting part positioned between the first clamp arm and the second clamp arm, when the clamp is in an open state, the first clamp arm and the second clamp arm form clamping surfaces, and the clamping surfaces of the plurality of clamps are positioned on the same plane;

the operating assembly drives the clamp feeding assembly and the clamp pushing assembly to move forwards and drives the jaw assembly to close the jaws;

the clip feeding assembly is positioned on a first side of the clamping surface of the clip; the push-clamp assembly is located on a second side of the clamping face of the clamp, the first side being different from the second side.

2. The clip applier of claim 1, wherein N of said gripping surfaces of said N clips lie in a common plane.

3. The clip applier of claim 1, wherein said clip magazine includes a bottom wall, first and second oppositely disposed side walls, a magazine body of said clips received in said clip magazine being parallel to said bottom wall;

the clamp feeding assembly is located on the outer side of the bottom wall of the clamp box, and the clamp pushing assembly is located on the inner side of the bottom wall of the clamp box.

4. The clip applier according to claim 3,

the bottom wall of the cassette includes an opening from which the clip feed assembly enters the cassette and is located between the first clip and the second clip.

5. The clip applier of claim 4, wherein: the feeding and clamping assembly comprises an elastic push rod and a feeding and clamping block arranged at one end of the elastic push rod;

the rod body assembly further comprises a base, the base comprises a guide groove extending along the axial direction and a block groove communicated with the guide groove, the block groove comprises a guide inclined plane, and the guide inclined plane forms an angle with the axial direction;

the guide groove accommodates the elastic push rod and guides the elastic push rod to move along the axial direction, the block groove accommodates the clamping block, and the guide inclined surface guides the clamping block to enter the opening.

6. The clip applier of claim 5, wherein said bottom walls include a first bottom wall forward of said opening and a second bottom wall rearward of said opening; the base is mounted to the cartridge, and the guide ramp is contiguous with the first bottom wall.

7. The clip applier of claim 5, wherein a thickness of the send block is greater than a thickness of the resilient push rod.

8. The clip applier of claim 5, wherein said clip feed assembly further comprises a link extending in an axial direction, one end of said link being connected to said resilient pusher bar and the other end of said link being connected to said operating assembly.

9. The clip applier of claim 8, wherein said guide slots further receive said links and guide the movement of the links in an axial direction.

10. The clip applier of claim 9, wherein said operating assembly further comprises an actuating member and an adapter mechanism; the actuating piece is used for providing power for the clamp feeding assembly and the clamp pushing assembly; the matching and connecting mechanism comprises a first matching and connecting piece, an intermediate piece and a second matching and connecting piece, and the first matching and connecting piece drives the second matching and connecting piece through the intermediate piece; the clamp sending component is linked with the first connecting piece; the push clamp component is linked with the second connecting piece; the direction of movement of the first coupling member is opposite to the direction of movement of the second coupling member.