clip applier

Abstract

The present invention discloses a clamping forceps, comprising a transmission mechanism for performing clamping, clamping and pushing clamping actions; the transmission mechanism comprises a firing drive mechanism, a continuous firing drive mechanism and a matching mechanism; the firing drive mechanism is used to perform the clamping delivery action and the clamping action, and the continuous firing drive mechanism is used to perform the pushing clamping action; the matching mechanism comprises a first matching member, an intermediate member and a second matching member, and the first matching member drives the second matching member through the intermediate member; the firing drive mechanism is linked to the first matching member; the continuous firing drive mechanism is linked to the second matching member; the movement direction of the first matching member is opposite to the movement direction of the second matching member. The clamping forceps of the present invention achieves asynchrony of the pushing clamping action with the clamping delivery action and the clamping action through the matching mechanism, effectively avoiding the interference problem between the clamping delivery action and the pushing clamping action, thereby effectively improving the safety and reliability of the clamping forceps.

Description

TECHNICAL FIELD

[0001] The present application relates to a clip applier. BACKGROUND

[0002] In the human surgery, such as abdominal surgery, to prevent bleeding is a major element of the final success of the operation, the clip applier is born. The traditional clip appliers can only be used once, after the installation of a clip in the body, the clip applier is sent into the body, the clip applier is executed, and the single clip is repeatedly installed, which is inconvenient to use. In recent years, the continuous clip appliers capable of continuously applying multiple clips have become a trend.

[0003] In the prior art, the mechanism for performing the clip feeding action (pushing the clip at the farthest end of the clip box into the clip applier) and the clip pushing action (pushing the remaining clips in the clip box forward by one station) of the continuous clip applier is a driving mechanism, and the clip feeding and pushing actions are synchronized. The driving mechanism generally includes a driving rod, a clip feeding head and multiple clip pushing heads. The clip feeding head and the clip pushing heads are arranged on the driving rod. The clip feeding head is located at the farthest end of the driving rod, and the multiple clip pushing heads are arranged at intervals behind the clip feeding head. When the driving mechanism advances, the clip feeding head feeds the clip at the farthest end of the clip box into the clip applier assembly, and the clip pushing heads push the other clips forward by one station. In order to avoid interference between the clip feeding head and the clips behind it when the driving mechanism retreats, the clip feeding head is generally small in size and thin in thickness, usually a sheet. Such structure may make the clip feeding unstable, the strength of the clip feeding head insufficient, and the clip feeding head prone to breakage during movement, thereby affecting the normal work of the clip applier and further affecting the operation.

[0004] The driving mechanism is used to simultaneously perform the clip feeding action and the clip pushing action. Although the structure seems simple, the stability and safety are reduced, and the possibility of failure is increased. As long as a small part of the driving mechanism fails, the clip feeding action and the clip pushing action may not be performed, thereby affecting normal use. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application aims to provide a clip applier. The present application is achieved by the following technical solutions:

[0006] A clip applier includes a housing, a transmission mechanism, an actuating member; the actuating member is configured to power the transmission mechanism, at least part of the transmission mechanism is housed in the housing; the transmission mechanism is configured to perform a clip feeding action, a clip applying action and a clip pushing action; the transmission mechanism includes a firing drive mechanism, a burst drive mechanism and a coupling mechanism; the firing drive mechanism is configured to perform the clip feeding action and the clip applying action, the burst drive mechanism is configured to perform the clip pushing action; 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 firing drive mechanism is connected with the first coupling member; the burst drive mechanism is connected with the second coupling member; the movement direction of the first coupling member is opposite to the movement direction of the second coupling member.

[0007] Further, the first coupling member includes an upper rack, the second coupling member includes a lower rack, the intermediate member includes a first gear and a second gear; the upper rack is engaged with the first gear, the lower rack is engaged with the second gear.

[0008] Further, the first gear is coaxial with the second gear, and the diameter of the first gear is greater than the diameter of the second gear.

[0009] Further, the first coupling member and the second coupling member are arranged along a longitudinal direction, the intermediate member is arranged between the first coupling member and the second coupling member, and is arranged along a direction perpendicular to the longitudinal direction.

[0010] Further, when the firing drive mechanism moves a first distance in a first direction, the burst drive mechanism moves a second distance in a second direction opposite to the first direction; the first distance is greater than the second distance.

[0011] Further, the firing drive mechanism includes a clip feeding drive mechanism and a jaw drive mechanism, the transmission mechanism further includes a switching mechanism, the switching mechanism is connected with the first coupling member, the firing drive mechanism is connected with the first coupling member through the switching mechanism, the switching mechanism is configured to selectively drive the clip feeding drive mechanism or the jaw drive mechanism; pressing the actuating member, the switching mechanism drives the clip feeding drive mechanism to advance to perform the clip feeding action and drives the jaw drive mechanism to advance to perform the clip applying action in sequence under the action of the actuating member, while driving the first coupling member to advance, thereby driving the burst drive mechanism to retreat to store energy; the burst drive mechanism includes a third return member, the third return member is configured to store the energy; releasing the actuating member, the burst drive mechanism advances to perform the clip pushing action under the action of the third return member.

[0012] Further, the clip feeding driving mechanism, the jaw driving mechanism and the continuous firing driving mechanism are arranged along a longitudinal direction; the clip feeding driving mechanism moves along the longitudinal direction in the jaw driving mechanism; the continuous firing driving mechanism and the second connecting member move along the longitudinal direction in the clip feeding driving mechanism; further, the continuous firing driving mechanism comprises a clip pushing driving member, one end of the third reset member is connected with the shell, and the other end is connected with the proximal end of the second connecting member; the clip pushing driving member is connected with the distal end of the second connecting member; the clip pushing driving member is arranged with a plurality of side cavities along the longitudinal direction, and each side cavity is arranged with a clip pushing block; the clip pushing driving member drives the clip pushing block to move under the action of the third reset member to perform the clip pushing action.

[0013] Further, the shell is arranged with a first guide groove and a second guide groove, the first connecting member moves in the first guide groove, and the second connecting member moves in the second guide groove, and the elastic element is located in the second guide groove.

[0014] Further, the distal end of the second connecting member is provided with a receiving space, the proximal end of the clip pushing driving member is accommodated in the receiving space and can rotate in the receiving space; the proximal end of the clip pushing driving member is provided with a stop portion which abuts against a limiting surface in the receiving space, so that the proximal end of the clip pushing driving member is axially fixed with the distal end of the second connecting member.

[0015] Further, the axis of the first connecting member is perpendicular to the axis of the intermediate member and parallel to the axis of the second connecting member; the axis of the second connecting member is coaxial with the axis of the proximal end driving member of the continuous firing driving mechanism and the axis of the proximal end driving member of the firing driving mechanism.

[0016] Compared with the prior art, the beneficial effects of the present application are that the clip feeding driving mechanism and the clip pushing driving mechanism are independent driving mechanisms, which increases the design space and can realize more reliable and stable clip feeding and clip pushing actions, the different steps of the clip pushing action, the clip feeding action and the clamping action are realized through the connecting mechanism, the interference problem of the clip feeding action and the clip pushing action is effectively avoided, and the safety and reliability of the clip applier are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a perspective view of the clip applier provided by the first embodiment of the present application;

[0018] FIG. 2 is FIG. 1 is a front view of the clip applier with part of the shell hidden;

[0019] FIG. 3 is FIG. 1A perspective view of the clip applier shown with a portion of the housing hidden;

[0020] FIG. 4A yes FIG. 1 A schematic diagram of the front structure of the clip of the clip applier shown;

[0021] FIG. 4B yes FIG. 1 A schematic side view of the structure of the clip of the clip applier shown;

[0022] FIG. 5 yes FIG. 1 An exploded perspective view of the jaw assembly and shaft assembly of the clip applier shown;

[0023] FIG. 6 yes FIG. 1 A schematic structural diagram of the jaw drive mechanism of the clip applier shown;

[0024] FIG. 7 yes FIG. 6 An exploded perspective view of a portion of the jaw drive mechanism shown;

[0025] FIG. 8 yes FIG. 1 A schematic structural diagram of a clip delivery drive mechanism of the clip applier shown;

[0026] FIG. 9 yes FIG. 8 An exploded perspective view of the clip delivery drive mechanism of the clip applier;

[0027] FIG. 10 yes FIG. 1 A front view of the clamp push rod and the adapter block of the clamp push drive mechanism of the clip applier shown;

[0028] FIG. 11 yes FIG. 10 A perspective schematic diagram of a clamp push rod of a clamp push drive mechanism of the clip applier shown;

[0029] FIG. 12 to FIG. 14 yes FIG. 1 A schematic diagram of state changes of the transmission mechanism of the clip applier shown;

[0030] FIG. 15A yes FIG. 1 A cross-sectional view of the jaw assembly and shaft assembly at MM with the wrench of the clip applier shown in the open position;

[0031] FIG. 15B yes FIG. 1 A cross-sectional view of the jaw assembly and shaft assembly taken at LL with the clip applier handle shown in the open position;

[0032] FIG. 16A yes FIG. 1Cross-sectional view of the jaw assembly and the handle assembly of the clip applier at the middle position at M-M;

[0033] FIG. 16B is FIG. 1 Cross-sectional view of the jaw assembly and the handle assembly of the clip applier at the middle position at L-L;

[0034] FIG. 17A is FIG. 1 Cross-sectional view of the jaw assembly and the handle assembly of the clip applier at the closed position at M-M;

[0035] FIG. 17B is FIG. 1 Cross-sectional view of the jaw assembly and the handle assembly of the clip applier at the closed position at L-L;

[0036] FIG. 18 is FIG. 1 Perspective view of the partial switching mechanism of the clip applier in exploded view;

[0037] FIG. 19 is FIG. 1 Another perspective view of the partial switching mechanism of the clip applier in exploded view;

[0038] FIG. 20 is FIG. 1 Structural schematic view of the knob assembly transmission mechanism of the clip applier;

[0039] FIG. 21 is FIG. 1 Structural schematic view of the adapter mechanism of the clip applier;

[0040] FIG. 22 is FIG. 1 Explanatory schematic view of the adapter block assembly of the second adapter of the clip applier;

[0041] FIG. 23A is FIG. 1 Schematic view of the movement process of the clip feeding block of the clip applier;

[0042] FIG. 23B is FIG. 23A Schematic view of the movement trajectory of the clip feeding block of the clip applier;

[0043] FIG. 24A is FIG. 1 Schematic view of the movement process of the clip pushing block of the clip applier;

[0044] FIG. 24B is FIG. 24A Schematic view of the movement trajectory of the clip pushing block of the clip applier;

[0045] FIG. 25 isFIG. 2 Structure diagram of the handle of the clip applier;

[0046] FIG. 26 Is FIG. 25 Structure exploded diagram of the guide channel of the handle of the clip applier;

[0047] FIG. 27 Is FIG. 2 Structure diagram of the guide pivot of the clip applier;

[0048] FIG. 28 Is FIG. 2 Assembly diagram of the guide pivot and the handle lock spring element of the clip applier;

[0049] FIG. 29 Is FIG. 2 Structure diagram of the path switch of the clip applier;

[0050] FIG. 30 Is FIG. 1 Internal structure diagram of the housing of the clip applier;

[0051] FIG. 31A Is FIG. 2 State diagram of the handle lock mechanism of the clip applier when the handle of the clip applier is in the open position;

[0052] FIG. 31B Is FIG. 2 State diagram of the handle lock mechanism of the clip applier when the handle of the clip applier is positively moved to the intermediate position;

[0053] FIG. 31C Is FIG. 2 State diagram of the handle lock mechanism of the clip applier when the handle of the clip applier is in the closed position;

[0054] FIG. 31D Is FIG. 2 State diagram of the handle lock mechanism of the clip applier when the handle of the clip applier is reset to the intermediate position;

[0055] FIG. 32 Is FIG. 1 Sectional view of the clip applier from the perspective of the path switch;

[0056] FIG. 33A Is FIG. 1 State diagram of the path switch of the clip applier when the handle of the clip applier is in the open position;

[0057] FIG. 33B Is FIG. 1 State diagram of the path switch of the clip applier when the handle of the clip applier is positively moved to the first adjacent position;

[0058] FIG. 33Cis FIG. 1 State diagram of the path switching member when the handle of the clip applier is in the closed position;

[0059] FIG. 33D is FIG. 1 State diagram of the path switching member when the handle of the clip applier is reset to the second proximal position;

[0060] FIG. 34 is FIG. 1 Structural schematic diagram of the jaw assembly of the clip applier;

[0061] FIG. 35 is FIG. 34 Structural schematic diagram of the first or second clip arm of the jaw assembly;

[0062] FIG. 36 is FIG. 34 Sectional view of the jaw assembly from one perspective;

[0063] FIG. 37 is FIG. 34 Structural schematic diagram of the stopper and the clip of the jaw assembly;

[0064] FIG. 38 is FIG. 34 Structural schematic diagram of the stopper of the jaw assembly;

[0065] FIG. 39 is FIG. 34 Sectional view of the jaw assembly from another perspective;

[0066] FIG. 40 is FIG. 34 Sectional view of the jaw assembly assembled with the clip cartridge;

[0067] FIG. 41 is FIG. 34 Schematic diagram of the jaw assembly in the closed state;

[0068] FIG. 42 is FIG. 34 Schematic diagram of the jaw assembly in the open state;

[0069] FIG. 43 to FIG. 45 is a state change schematic diagram of a partial transmission mechanism of the clip applier provided by the second embodiment of the application;

[0070] FIG. 46 is a three-dimensional exploded view of a partial switching mechanism of the clip applier provided by the third embodiment of the application;

[0071] FIG. 47 to FIG. 50 is a state change schematic diagram of a partial transmission mechanism of the surgical instrument provided by the third embodiment of the application;

[0072] FIG. 51 is a perspective exploded view of a switching mechanism of a clip applier according to a fourth embodiment of the present application;

[0073] FIG. 52 to FIG. 54 is a state change schematic view of a partial transmission mechanism of the clip applier according to the fourth embodiment of the present application. DETAILED DESCRIPTION

[0074] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of the present application.

[0075] The user of the surgical instrument can be a clinician, who manipulates the surgical instrument during surgery to perform the surgery. As used herein, the terms "proximal," "rear" and "distal," "front" are with reference to the clinician manipulating the surgical instrument. The terms "proximal," "rear" refer to the portion of the instrument closest to the clinician, while the terms "distal," "front" refer to the portion of the instrument farthest from the clinician. "Left," "right" are relative designations made with reference to the position of the surgical instrument as shown, for example, the jaw assembly is "left" and the sleeve 210 is "right." The terms "up," "down" are made with reference to the relative positions of the upper and lower jaws of the jaw assembly, specifically, the upper jaw is "up" and the lower jaw is "down." It should be understood that the terms "proximal," "rear," "distal," "front," "left," "right," "up," "down" are defined for ease of description and that the surgical instrument can be used in many orientations and positions, and therefore these terms expressing relative positional relationships are not limiting and absolute. FIG. 1 The position of the surgical instrument as shown is used as a reference, for example, the jaw assembly is "left" and the sleeve 210 is "right." The terms "up," "down" are made with reference to the relative positions of the upper and lower jaws of the jaw assembly, specifically, the upper jaw is "up" and the lower jaw is "down." It should be understood that the terms "proximal," "rear," "distal," "front," "left," "right," "up," "down" are defined for ease of description and that the surgical instrument can be used in many orientations and positions, and therefore these terms expressing relative positional relationships are not limiting and absolute.

[0076] In the present application, unless otherwise clearly specified and limited, the terms "connected," "connection" and the like should be interpreted in a broad sense, for example, can be fixedly connected, can be detachably connected, can be movably connected, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances. It should be noted that when the "connected," "connection" is limited by a modifier, it has the meaning limited by the modifier, and only excludes the obviously excluded cases, and does not exclude other possible cases, for example, "detachably connected" refers to detachable connection, and excludes fixed connection and integration, but movable connection, direct connection, indirect connection through an intermediate medium are not excluded.

[0077] The embodiments described below are exemplary and are intended to be illustrative of the present application, and are not to be construed as limiting the present application. As used herein, the terms "axial" or "longitudinal" refer to the lengthwise direction of the cannula 210.

[0078] FIG. 1 to FIG. 42 A surgical instrument according to a first embodiment of the present application, specifically a clip applier for applying clips to a human body, such as a blood vessel or other tissue other than a blood vessel, is shown. In terms of general positional relationship, the clip applier comprises an operating assembly 300, a shaft assembly 200 extending from the operating assembly 300, and a jaw assembly provided at one end of the shaft assembly 200. In order to apply a plurality of clips successively, the clip applier needs to perform three actions: a clip feeding action, a jaw closing action (clip applying action), and a clip pushing action, and the clip feeding action is necessarily followed by the jaw closing action. The three actions need to be completed in order to use the clip applier once. The number of times the clip applier is used depends on the number of clips contained therein.

[0079] The operating assembly 300 comprises a main body 320 and a wrench (actuating member 330) movably mounted on the main body 320, the main body 320 comprises a housing 321, the wrench is movably connected to the housing 321, the housing 321 is divided into a generally spindle-shaped cylindrical head housing 321 and a handle housing 321 extending from the lower side of the head housing 321 in terms of positional relationship, the handle housing 321 and the wrench constitute a handle assembly, a user can hold the handle housing 321 with one hand, and pull the wrench with fingers to move the wrench relative to the main body 320. The clip applier further comprises a transmission mechanism, part of the transmission mechanism is accommodated in the housing 321 of the operating assembly 300, and part of the transmission mechanism is located in the shaft assembly 200.

[0080] In order to realize the clip feeding action, the jaw closing action (clip applying action), and the clip pushing action, the transmission mechanism comprises a clip feeding drive mechanism, a jaw drive mechanism, and a clip pushing drive mechanism, the wrench drives the transmission mechanism to move, thereby driving the clip feeding drive mechanism, the jaw drive mechanism, and the clip pushing drive mechanism to move, the clip feeding drive mechanism performs the clip feeding action, the jaw drive mechanism performs the jaw closing action (clip applying action), and the clip pushing drive mechanism performs the clip pushing action, and specific details will be described in detail below.

[0081] As FIG. 4A-4BAs shown, the clip 10 of the clip applier includes a first clip arm 31, a second clip arm 32, and a connection between the first clip arm 31 and the second clip arm 32, about which the two clip arms can pivot relative to each other. 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 clip arm 31 and the second clip arm 32 of the clip 10 are driven by an external force to approach each other, and finally the first engaging portion 35 is engaged with the second engaging portion 36 of the second clip arm, so that the first clip arm 31 and the second clip arm 32 are fixed to each other, realizing the clamping of the tissue between the first clip arm 31 and the second clip arm 32. At this time, the first clip arm 31 and the second clip arm 32 are combined. When the first clip arm 31 and the second clip arm 32 of the clip 10 are combined, the clip is in a closed state / locked state, and when the first clip arm 31 and the second clip arm 32 of the clip 10 are separated from each other, the clip is in an open state. The first engaging portion 35 is a pointed end 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.

[0082] The jaw assembly includes a first jaw arm 1 and a second jaw arm 1' pivotably connected to the handle assembly 200 respectively, and a clip 10 supported between the first jaw arm 1 and the second jaw arm 1'. The jaw assembly is switchable between an open state and a closed state. In the open state, the jaw assembly clamps a clip in the open state. Due to the structural limitation, the jaw assembly cannot be opened unlimitedly, and the open state of the jaw assembly includes an open-to-bottom state in which the distance between the distal ends of the first jaw arm 1 and the second jaw arm 1' in the up-down direction is maximum. In the closed state, the distance between the distal ends of the first jaw arm 1 and the second jaw arm 1' in the up-down direction is minimum. The closing of the jaw assembly causes the clip 10 to change from the open state to the closed state. The jaw proximal end driver drives the sleeve 210 (jaw distal end driver) to move forward and backward, and the specific manner will be described below. The forward movement of the sleeve 210 causes the jaw assembly to close to close the jaw assembly, and the first jaw arm and the second jaw arm compress the clip supported therebetween. The backward movement of the sleeve 210 causes the jaw assembly to open to open the jaw assembly.

[0083] The handle assembly 200 includes a clip box 220, a base 240, a clip feeding assembly, a clip pushing assembly, and a sleeve 210 sleeved on the clip box 220, the clip feeding assembly, and the clip pushing assembly. The clip feeding assembly belongs to a clip feeding drive mechanism, the clip pushing assembly belongs to a clip pushing drive mechanism, and the sleeve 210 belongs to a jaw drive mechanism.

[0084] The first end (distal end) of the clip box 220 is connected to the jaw assembly, and the second end (proximal end) opposite to the first end is fixedly connected to the main body 320. The clip box 220 can accommodate at most M clips, and M is greater than or equal to 2, which is related to the size of the clip box 220. When the clip applier is used once, the number of clips in the clip box 220 will decrease by one. When the clip box 220 contains N clips, N is less than or equal to M, and the N clips are sequentially arranged from the first end to the second end, which are the first clip, the second clip, and the Nth clip. The first clip is closest to the first end and is the first to be sent into the jaw assembly. The clips other than the first clip in the clip box 220 are defined as other clips. The clip box 220 includes M workstations, which are sequentially arranged from the distal end to the proximal end of the clip box 220, and are the first workstation, the second workstation, and the Mth workstation. The first clip is located in the first workstation at the front end, and the second clip to the Nth clip are sequentially arranged in the second workstation to the Nth workstation.

[0085] The clip box 220 has a bottom wall 221, and a plurality of transverse barbs 225 are formed along the length of the bottom wall 221, which are inclined towards the distal end of the clip box 220 and into the clip box 220. The transverse barbs 225 are arranged at equal intervals, and the distal end of the transverse barb 225 is an inclined end. When the clip moves axially forward, the clip slides in contact with the front transverse barb 225 to bend towards the bottom wall 221 to smoothly pass through the transverse barb 225, so that the clip enters the adjacent front workstation from the current workstation; the inclined end of the transverse barb 225 abuts against the rear side of the clip to prevent the clip from retreating, thereby preventing the clip from entering the adjacent rear workstation from the current workstation. Therefore, the transverse barb 225 has a one-way locking function to prevent the clip from retreating between adjacent workstations.

[0086] In this embodiment, a first transverse barb and a second transverse barb are arranged between two adjacent workstations. The first transverse barb is arranged to block a first protrusion 41 at the rear of the clip, and the second transverse barb is arranged to block a second protrusion 42 on the same side of the same clip at the rear of the clip to prevent the clip from entering the adjacent rear workstation from the current workstation in the clip box 220. In this embodiment, there are a plurality of first transverse barbs and a plurality of second transverse barbs, which are arranged in two columns on both sides of the width of the bottom wall 221, and the adjacent transverse barbs 225 in each column are axially arranged at equal intervals.

[0087] In this embodiment, the clip box 220, the clip feeding assembly, and the clip pushing assembly at the rod body assembly 200 form a special three-layer design, and the specific details are as follows.

[0088] When the clip is in the open state, a clamping surface is formed between the first clip arm and the second clip arm. The clip feeding assembly is used to abut and push the first clip forward to enter the jaw assembly; the clip pushing assembly is used to abut and push the second clip to the Nth clip forward; the jaw assembly is used to receive a clip (the first clip) from the clip box 220 and perform a closing action to compress the clip to the closed state. The clip feeding assembly is located on the first side of the clamping surface of the clip, and the clip pushing assembly is located on the second side of the clamping surface of the clip, and the first side is different from the second side. The clip feeding assembly and the clip pushing assembly are independent components, respectively located on both sides of at least one clip, and the first clip or other clips are independently pushed from both sides, so that the advancing length of the clip feeding and the advancing length of the clip pushing do not need to be equal, and the size design of the jaw assembly and the size design of the clip box 220 can be independent of each other, providing design space for independent optimization of the structure of the jaw assembly and the structure of the clip box 220, and providing design space for optimizing the structure of the clip pushing assembly and the clip feeding assembly. The structure of the clip applier is simple and compact in size.

[0089] In the prior art, an integrated push piece is used, and the clip feeding piece and the clip pushing piece must be sheet-shaped, otherwise the clip feeding piece and the clip pushing piece will interfere with the clip when retreating, but the sheet-shaped structure is not rigid enough and is easy to bend, resulting in unstable clip feeding and clip pushing, and the integrated forming requires high production process; the size design of the jaw assembly must meet the advancing length of the clip feeding, and the distance between the adjacent two clips in the clip box 220 is equal to the advancing length of the clip pushing. The push piece synchronously executes the clip feeding and the clip pushing, and the advancing length of the clip feeding and the advancing length of the clip pushing are equal, which causes the size design of the jaw assembly and the size design of the clip box 220 to be matched with each other, and the clip applier is not compact in size and is complex in design. For example, the distance between the adjacent clips in the clip box 220 cannot be too small, otherwise the size of the jaw assembly is too small to meet the stable clamping of the first clip, and the size of the jaw assembly cannot be too large, otherwise the distance between the adjacent clips in the clip box 220 is large, resulting in a long size of the clip box 220 and a large overall size of the clip applier. In the split mode of the clip feeding assembly and the clip pushing assembly of the present embodiment, the distance between the clips in the clip box 220 can be designed to be small enough, and 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 stable guiding, clamping and compressing of the clip, and is not limited by the distance between the clips. In addition, the clip feeding assembly and the clip pushing assembly can be designed to be rigid enough to solve the problem of unstable pushing of the clip in the prior art.

[0090] The first and second arms each have a center line, and the clip includes parallel first and second side surfaces. Since the clip is substantially C-shaped in the open state, the first and second side surfaces are each C-shaped in the open state. In one embodiment, the clamping surface is a surface formed by the two center lines of the first and second arms, and the first and second sides of the clamping surface are the first and second sides of the clamping surface on which the feeding assembly and the pushing assembly are respectively arranged. In another embodiment, the first side surface of the C-shape forms a first clamping surface, and the second side surface forms a second clamping surface. The first and second clamping surfaces are on the inner side between the first and second clamping surfaces, and the two outer sides of the first and second clamping surfaces are the first and second sides of the clamping surface on which the feeding assembly and the pushing assembly are respectively arranged.

[0091] In the embodiment, when the clip is installed in the clip box 220, the two arms of the clip are compressed by the first and second side walls 222 and 223, but are not compressed to the closed state. The clip plane is parallel to the bottom wall 221, and the clamping surfaces of the plurality of clips are in the same plane. In other embodiments, the plurality of clips can be arranged obliquely in the clip box 220, and the clamping surfaces of the plurality of clips are not in the same plane, but the clamping surfaces of the plurality of clips are parallel to each other. The feeding assembly and the pushing assembly are still arranged on the first and second sides of each clamping surface with respect to the clamping surface.

[0092] The clip box 220 includes a bottom wall 221 extending in the length direction and opposite first and second side walls 222 and 223 to form a substantially C-shaped structure. When the clip box 220 contains the clip, the clamping surface of the clip is parallel to the bottom wall 221. The feeding assembly is located outside the bottom wall 221 of the clip box 220, and the pushing assembly is located inside the bottom wall 221 of the clip box 220. In this way, the feeding assembly and the pushing assembly separately push the first clip and the other clips from the two sides of the clip box 220, respectively. The space in the sleeve 210 on both sides of the clip box 220 is fully utilized, the design freedom of the feeding assembly and the pushing assembly is improved, and the structure of the clip applying forceps is more stable and compact. The inside and outside of the bottom wall 221 refer to the two sides of the plane on which the bottom wall 221 is located, and the clip, the first side wall 222 and the second side wall 223 are located on the inside of the bottom wall 221.

[0093] An opening is formed in the bottom wall 221 of the clip box 220, and the opening is located near the distal end of the bottom wall 221. The feeding assembly enters the clip box 220 from the opening and is located between the first and second clips. The opening ensures that the feeding assembly can smoothly enter and exit the clip box 220 and enter between the first and second clips, so that the rear end of the first clip abuts against the first clip to push it forward. Preferably, part of the opening is located in the first station, and the other part is located in the second station.

[0094] The feeding clamp assembly comprises a resilient push rod 232 and a feeding clamp block 231 connected to one end of the resilient push rod 232, and the feeding clamp block 231 is used to abut and push the first clamp; the base 240 is provided with a channel for accommodating the feeding clamp assembly and allowing the feeding clamp assembly to move axially, and the channel comprises an axially extending guide groove 241 and a block groove 242 communicating with the guide groove 241, and the block groove 242 comprises a guide inclined surface 243 arranged at an angle to the axial direction. Specifically, when the base 240 and the clamp box 220 are installed together, the guide inclined surface 243 is inclined towards the distal end and the clamp box 220, the resilient push rod 232 is composed of a plurality of metal sheets stacked together and has elasticity and can be bent. At the initial moment, the feeding clamp block 231 and the resilient push rod 232 are parallel to the axial direction, the guide groove 241 accommodates the resilient push rod 232, the block groove 242 accommodates the feeding clamp block 231, the guide groove 241 guides the resilient push rod 232 to move axially, and the guide inclined surface 243 guides the feeding clamp block 231 to enter the opening. Specifically, when the resilient push rod 232 moves axially forward along the guide groove 241, the feeding clamp block 231 at the front end abuts against the guide inclined surface 243, the resilient push rod 232 begins to bend, and the feeding clamp block 231 enters the opening of the clamp box 220 obliquely along the guide inclined surface 243, so that the rear end of the first clamp abuts against the first clamp to push it forward, and then the resilient push rod 232 moves axially backward along the guide groove 241, driving the feeding clamp block 231 to retreat from the opening along the guide inclined surface 243 into the block groove 242. The base 240 has strong rigidity, its channel accommodates the feeding clamp assembly, ensuring that the feeding clamp assembly is stably and reliably arranged in the clamp pliers at the initial moment, and at the same time, the guide groove 241 provides a fixed channel for the elastic resilient push rod 232, limiting its movement space, avoiding excessive bending or even bending of the resilient push rod 232 when it moves, and blocking in the sleeve 210, affecting the feeding clamp function. Compared with the inclined feeding clamp piece in the prior art, the rigid guide inclined surface 243 ensures the stability of the movement of the feeding clamp block 231. The bottom wall 221 of the clamp box 220 further comprises 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 installed to the clamp box 220, the guide inclined surface 498 is connected with the first bottom wall 221a. The guide inclined surface 498 is directly connected with the first bottom wall 221a without gap, which can ensure that the feeding clamp block 231 enters the opening smoothly without obstruction and will not be accidentally stuck. The thickness of the feeding clamp block 231 is greater than the thickness of the resilient push rod 232. The resilient push rod 232 adopts a thin and elastic structure, which ensures that it can bend along the guide inclined surface 243, so that the feeding clamp block 231 can move along the guide inclined surface 243. The thickness of the feeding clamp block 231 is large, so the strength of the feeding clamp block 231 is large and it is not easy to deform, and due to the large thickness, the feeding clamp block 231 forms a first abutting surface at the distal end which contacts the clamp, and the first abutting surface has a large area and can stably push the first clamp. Preferably, the feeding clamp block 231 and the resilient push rod 232 are independent parts and can be fixed by welding.

[0095] The feeding assembly further comprises an axially extending feeding rod 233, one end of the feeding rod 233 is connected with the elastic push rod 232, the other end is connected with the operating assembly 300, and the guide groove 241 accommodates the feeding rod 233. The operating assembly 300 drives the feeding rod 233 to move axially, so that the feeding rod 233 drives the elastic push rod 232 and the feeding block 231 to move together. The feeding rod 233 is a cylindrical rod or a square rod or the like, which is different from the elastic push rod 232. The feeding rod 233 is rigid and is not easy to deform, which avoids that the elastic push rod 232 is easy to bend in the guide groove 241 when moving axially, thereby improving the stability of the movement of the feeding assembly.

[0096] The guide groove 241 of the base 240 further accommodates the feeding rod 233 and guides the feeding rod 233 to move along the axial direction. The feeding 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 rod 233. The push assembly is a push seat 250, which comprises a push block 253, an elastic member 254, and a push rod 251. The push rod 251 is provided with a side cavity 252. The side cavity 252 or the push block 253 is provided with a rotating shaft, and the push block 253 is rotatably installed in the side cavity 252 through the rotating shaft. The push block 253 comprises an abutting end, which can abut and push the clip to move forward. The abutting end is arranged at the distal end of the push block 253. One end of the elastic member 254 is connected with the push block 253, and the other end is connected with the push rod 251. The elastic member 254 provides a force for the push block 253 to rotate outward from the side cavity 252, specifically, to make the abutting end of the push block 253 tilt towards the clip. In the embodiment, corresponding to the plurality of workstations, a plurality of side cavities 252 are arranged on the push rod 251 at intervals, and one elastic member 254 and one push block 253 are arranged in each side cavity 252. When the push assembly moves forward along the axial direction, the abutting ends of the plurality of push blocks 253 abut and push one clip to move forward respectively. When the push assembly moves backward along the axial direction, the push blocks 253 are pressed by the clips and rotate into the side cavities 252, thereby avoiding the clips, so that the push blocks 253 do not move backward with the clips. The push block 253 has a certain thickness, so that the abutting end of the push block 253 is a second abutting surface with a certain area, which ensures the stability of abutting with the clip. The abutting end can also be arranged as a recess, and the clip arm is just clamped into the recess, which further enhances the stability of abutting. The push assembly is the push distal end driving member in the application.

[0097] The first side wall 222 and the second side wall 223 of the clip box 220 are respectively provided with protruding first clamping strips and second clamping strips. The upper and lower surfaces of the push rod 251 of the push seat 250 are respectively provided with first clamping grooves and second clamping grooves matched with the first clamping strips and the second clamping strips, so that the push seat 250 is slidably installed in the clip box 220.

[0098] Further, the operating assembly 300 further comprises a coupling mechanism, the actuating member 330 is used to drive the feeding clamp assembly and the pushing clamp assembly, the coupling mechanism comprises 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 connected with the first coupling member, the pushing clamp assembly is connected with the second coupling member, and the movement direction of the first coupling member is opposite to that of the second coupling member. The structure of the coupling mechanism, the movement process and the connection mode of the coupling mechanism with the feeding clamp assembly and the pushing clamp assembly are described in detail below, and the benefits are shown below, and thus will not be described here.

[0099] In the embodiment, the transmission mechanism comprises a feeding clamp driving mechanism and a jaw driving mechanism, the feeding clamp driving mechanism is used to drive the clamp into the jaw assembly, and the jaw driving mechanism is used to drive the jaw assembly to move. The transmission mechanism further comprises a switching mechanism used to selectively drive the feeding clamp driving mechanism or the jaw driving mechanism; the transmission mechanism comprises a first state and a second state, in the first state, the switching mechanism is separated from the jaw driving mechanism and combined with the feeding clamp driving mechanism to drive the feeding clamp driving mechanism to move; in the second state, the switching mechanism is separated from the feeding clamp driving mechanism and combined with the jaw driving mechanism to drive the jaw driving mechanism to move. In the embodiment, when the switching mechanism drives the feeding clamp driving mechanism to move, the jaw driving mechanism is not driven to be in a stationary state, when the switching mechanism is separated from the feeding clamp driving mechanism, the feeding clamp driving mechanism no longer advances, the switching mechanism is combined with the jaw driving mechanism to drive the jaw driving mechanism to move, and energy is selectively transmitted to the feeding clamp driving mechanism or the jaw driving mechanism in the process, so that the energy consumption is low, the force required by the doctor to operate the actuating member 330 is also reduced, the operation is more comfortable, the clip applier is better operated, and the product experience is improved. In addition, the movement of the feeding clamp driving mechanism and the jaw driving mechanism is independent and time-sharing, and other problems caused by the linkage of the two, such as complex structure and complex movement relationship, can also be prevented.

[0100] The switching mechanism comprises a first clutching mechanism and a second clutching mechanism, the first clutching mechanism is connected with the second clutching mechanism, the first clutching mechanism moves together with the second clutching mechanism when the switching mechanism moves under the action of the actuating member 330; in the first state, the first clutching mechanism is combined with the clip driving mechanism to drive the clip driving mechanism to move, and the second clutching mechanism is separated from the jaw driving mechanism; in the second state, the first clutching mechanism is separated from the clip driving mechanism, and the second clutching mechanism is combined with the jaw driving mechanism to drive the jaw driving mechanism to move. Specifically, the first clutching mechanism comprises a first clutching member and a clutching switching mechanism; the first clutching member is connected with the clutching switching mechanism; in the first state, the first clutching member is combined with the clip driving mechanism; in the second state, the first clutching member is separated from the clip driving mechanism. The second clutching mechanism comprises a second clutching member, the second clutching member is connected with the first clutching mechanism, in order to make the structure of the switching mechanism more simple and compact, the second clutching member is the distal end part of the first clutching mechanism, specifically, the distal end part of the first clutching member. In an embodiment, the distal end part of the first clutching mechanism is the distal end face 508 thereof; in the first state, the distal end face 508 of the first clutching mechanism is separated from the proximal end face of the jaw driving mechanism, and in the second state, the distal end face 508 of the first clutching mechanism is combined with the proximal end face of the jaw driving mechanism. In another embodiment, the distal end part of the first clutching mechanism is the hook part protruding at the distal end thereof, the proximal end of the jaw driving mechanism is provided with the groove 314 matched with the hook part, in the first state, the hook part is not inserted into the groove 314 of the jaw driving mechanism, and in the second state, the hook part is inserted into the groove 314 of the jaw driving mechanism to push the jaw driving mechanism to move.

[0101] The clutch switching mechanism comprises a moving member and a moving guide, the moving member is connected with the first clutch member; when the moving member is guided by the moving guide to move from the first position to the second position, the first clutch member is switched from the combined state to the separated state with the clip feeding driving mechanism. Specifically, the moving member is a guide column 490 connected with the first clutch member, the moving guide is a guide rail arranged in the housing 321, and the guide column 490 can move on the guide rail. The head housing 321 of the clip applier comprises a first head housing 321 and a second head housing 321, the first head housing 321 and the second head housing 321 are arranged axially symmetrically, and the guide rail is selectively arranged on the inner wall of the first head housing 321 or the inner wall of the second head housing 321. In order to make the movement of the guide column 490 on the guide rail more stable, the guide rail is symmetrically arranged on the inner walls of the first head housing 321 and the second head housing 321. The guide rail comprises a first guide surface 494 and a second guide surface 496 higher than the first guide surface 494; the guide column 490 is located on the first guide surface 494 in the first position and is located on the second guide surface 496 in the second position. The first guide surface 494 is smoothly connected with the second guide surface 496 through a slope 498, so that the movement of the moving member is more smooth. The guide column 490 can move on the guide rail following the movement of the first clutch member, when the guide column 490 moves on the first guide surface 494, the first clutch member keeps the combined state with the clip feeding driving mechanism; due to the guide rail arranged in the housing 321 having different heights, when the moving member moves to the second guide surface 496 of the guide rail, the first clutch member is driven to move upward to separate from the clip feeding driving mechanism, and when the first clutch member separates from the clip feeding driving mechanism, the distal end of the first clutch mechanism combines with the proximal end of the jaw driving mechanism to drive the movement of the jaw driving mechanism. The advantages of such arrangement are that on the one hand, the clutch switching mechanism is simple in structure, does not need to increase additional devices, and fully utilizes the internal space of the housing 321, so that the structure is compact; on the other hand, the power consumption is low, the operation is smooth and labor-saving.

[0102] The switching mechanism has a switching mechanism body 500. In order to make the overall structure of the switching mechanism more compact, make full use of the space inside the clip applier, and make the movement of the switching mechanism more smooth, part of the first clutch mechanism is accommodated in the switching mechanism body 500. Specifically, the switching mechanism body 500 includes a proximal end face 502, a distal end face 508, a first through hole 510 passing through the proximal end face 502 and the distal end face 508, and a second through hole 512 passing through the upper end face of the switching mechanism and the arc face of the first through hole 510; the first through hole 510 is used for the clip feeding drive mechanism to pass through; the second through hole 512 is used for accommodating the first clutch member. The second clutch member is the distal end part of the switching mechanism body 500, and the distal end part can be the distal end face 508 as described above. In the first state, the distal end of the switching mechanism is arranged apart from the proximal end of the jaw drive mechanism; in the second state, the distal end of the switching mechanism is connected with the proximal end of the jaw drive mechanism. The first clutch member includes a clamping block 482, which is accommodated in the second through hole 512, and the clip feeding drive mechanism includes a clamping groove, the clamping block 482 and the clamping groove are matched to combine the first clutch member with the clip feeding drive mechanism. The clamping block 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 column 490, and the second end is detachably connected with the clamping groove; the first clutch member further includes a resilient element, such as a spring, which gives the clamping block 482 a downward force in the first state, so that the clamping block 482 abuts against the clamping groove, so that the first clutch member can be well combined with the clip feeding drive mechanism, and the stability of the clip feeding action is improved. In the present embodiment, in order to make the overall structure more simple and compact, the clamping groove is an annular groove 438 arranged on the proximal end outer circumferential surface of the clip feeding drive mechanism, and the second end of the clamping block 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 clamping block 482 can better push the clip feeding drive mechanism through the cooperation of the arc surface 484 and the bottom surface of the annular groove 438, and the cooperation of the abutting surface 486 and the end surface of the annular groove 438. Of course, in other embodiments, the first clutch member can also include a recess 314, and the clip feeding drive member includes a protrusion 440 matched therewith.

[0103] In the embodiment, the switching mechanism is sleeved on the clip feeding driving mechanism. In the first state, the switching mechanism is arranged apart from the jaw driving mechanism, and under the action of external force, the clip feeding driving mechanism is pushed forward, and the proximal end surface of the clip feeding driving mechanism gradually approaches the proximal end surface of the jaw driving mechanism. In the second state, the switching mechanism is separated from the clip feeding driving mechanism and is matched with the jaw driving mechanism to drive the jaw driving mechanism to advance, and the proximal end surface of the jaw driving mechanism gradually moves away from the proximal end surface of the clip feeding driving mechanism. In order to make the overall layout of the transmission mechanism more reasonable and the structure more compact, and also in order to increase the contact area between the switching mechanism and the jaw driving mechanism to make the driving more stable, the jaw driving mechanism is sleeved on the clip feeding driving mechanism, that is, the clip feeding driving mechanism is partially located in the jaw driving mechanism and can pass through the jaw driving mechanism. The clip feeding driving mechanism and the jaw driving mechanism move in the longitudinal direction under the action of the switching mechanism. The projection of the clip feeding driving mechanism on a plane perpendicular to the longitudinal direction is located inside the projection of the jaw driving mechanism on the plane, and the projection of the jaw driving mechanism on the plane is located inside the projection of the switching mechanism on the plane.

[0104] The actuating member 330 is used to provide power to the transmission mechanism. Specifically, the actuating member 330 abuts against the switching mechanism to drive the switching mechanism to move, and the switching mechanism selectively transmits the power to the clip feeding driving mechanism or the jaw driving mechanism. The proximal end of the switching mechanism has a driving surface 504 and a stop portion 506. The driving surface 504 abuts against the actuating member 330 to receive the power, and the stop portion 506 is used to limit the actuating member 330. The driving surface 504 is a recessed surface formed between the stop portion 506 and the surface of the switching mechanism, and the head of the actuating member 330 abuts against the recessed surface. In order to make the force applied by the actuating member 330 to the switching mechanism more uniform and make the switching mechanism move smoothly, the stop portion 506 is symmetrically arranged on both sides of the proximal end of the switching mechanism in the direction of movement. Correspondingly, the actuating member 330 has a holding portion and two push claws symmetrically arranged inside the housing 321 and extending from the holding portion. The two push claws respectively abut against the driving surfaces 504 on both sides of the switching mechanism. The stop portion 506 is protrudingly arranged on the outer surface of the switching mechanism and extends in the longitudinal direction. The inner walls of the first head housing 321 and the second head housing 321 are symmetrically provided with guide grooves matched with the stop portion 506. The stop portion 506 can move in the longitudinal direction in the guide grooves, and the guide grooves can limit the height direction of the stop portion 506. This can effectively reduce the shaking of the switching mechanism during movement and make the transmission more stable and reliable.

[0105] The clip applier further comprises a clip feeding and preventing mechanism, which comprises a biasing spring and a guide pivot 350, which is a guide pivot 350 comprising a preventing end 354. The guide pivot 350 comprises a pivot end 352 pivotally connected with the housing 321 and a guide 351 and the preventing end 354 extending outwardly from the pivot end 352; the guide 351 is movably connected with the actuating member 330, and movement of the actuating member 330 drives the guide 351 and the preventing end 354 to move around the pivot end 334 under the action of the biasing spring; in the first state, the preventing end 354 gradually approaches the proximal end of the clip feeding and driving mechanism; in the second state, the preventing end 354 abuts against the proximal end of the clip feeding and driving mechanism to prevent the clip feeding and driving mechanism from retreating.

[0106] The clip feeding and preventing mechanism can move its preventing end 354 to the proximal end of the clip feeding and driving mechanism and abut against the clip feeding and driving mechanism to prevent the clip feeding and driving mechanism from retreating at the moment when the switching mechanism is separated from the clip feeding and driving mechanism. However, to prevent the clip feeding and preventing mechanism from failing to abut against the clip feeding and driving mechanism due to element size deviation, movement error, etc., and causing the clip to retreat, the clip feeding and preventing mechanism can move its preventing end 354 to the proximal end of the clip feeding and driving mechanism before the switching mechanism is separated from the clip feeding and driving mechanism, and after the switching mechanism is separated from the clip feeding and driving mechanism, the clip feeding and driving mechanism retreats a small distance under the action of the first return member 418 until it abuts against the preventing end 354 of the clip feeding and preventing mechanism, thereby preventing the clip feeding and driving mechanism from further retreating and causing the clip to retreat. Since the elastic push rod 232 of the clip feeding and driving mechanism is elastic and is compressed when the clip feeding and driving mechanism advances, the elastic push rod 232 gradually recovers deformation during the process that the clip feeding and driving mechanism retreats a small distance under the action of the first return member 418, and at this time, the clip feeding block 231 still abuts against the clip, so the clip will not retreat when the clip feeding and driving mechanism retreats a small distance.

[0107] The actuating member 330 has a guide channel 340, which includes a starting point a, an ending point, and a locking point b between the starting point a and the ending 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 smaller than the distance from the locking point b to the pivot center of the actuating member 330; when the actuating member 330 rotates around its pivot center, the guide channel 340 rotates accordingly, so that the relative movement between the guide channel 340 and the guide member 351 occurs, and the guide member 351 can pass through the starting point a, the locking point b and the ending point in sequence according to the movement of the actuating member 330; in the first state, the guide member 351 relatively moves towards the locking point b, and the stop end 354 gradually approaches the proximal end of the clip feeding driving mechanism; in the second state, when the guide member 351 relatively moves to the locking point b, the stop end 354 abuts against the proximal end of the clip feeding driving mechanism to prevent the clip feeding driving mechanism from retreating. The existence of the clip feeding stop mechanism can avoid the problem that the clips located in the jaw assembly retreat to cause the inability to clamp blood vessels or tissues, thereby improving the reliability and safety of the operation. More detailed introduction of the actuating member 330 will be given later.

[0108] The jaw driving mechanism includes a jaw proximal end driving member and a jaw distal end driving member connected with the jaw proximal end driving member; in the second state, the switching mechanism drives the jaw proximal end driving member to move, and in turn drives the jaw distal end driving member to move. In the embodiment, the jaw proximal end driving member is a jaw driving tube 432, and the jaw distal end driving member is a sleeve 210. One end of the sleeve 210 is connected with the jaw driving tube 432, and the other end cooperates with the jaw assembly; in the second state, the switching mechanism combines with the jaw driving tube 432 to drive the jaw driving tube 432 to move, and in turn drives the sleeve 210 to move to drive the jaw assembly to close. The inner wall of the distal end of the jaw driving tube 432 is spaced apart to be provided with a convex rib 436, adjacent convex ribs 436 and the inner wall of the jaw driving tube 432 form an annular groove 438, the proximal end of the sleeve 210 is provided with an annular piece 442, the annular piece 442 is embedded in the annular groove 438, and the convex rib 436 abuts against the annular piece 442. The annular piece 442 is provided with a notch 444 which is symmetrical in the circumferential direction, and the inside of the annular groove 438 is provided with a protrusion 440 which is matched with the annular groove 438, the protrusion 440 and the notch 444 combine to make the sleeve 210 be installed in place and be fixed in the jaw driving tube 432. The jaw driving mechanism further includes a second reset member 446, such as an elastic element. The elastic element is sleeved outside the jaw driving tube 432, one end of the elastic element abuts against the baffle 434 on the outer surface of the jaw driving tube 432, and the other end extends forward to abut against the inner wall of the housing 321 of the clip applier, the elastic element is used to store energy when the jaw driving mechanism advances, the elastic element restores the deformation to release the energy, thereby providing power for the reset retreat of the jaw driving mechanism.

[0109] The sending clamp driving mechanism comprises a sending clamp proximal end driving member and a sending clamp distal end driving member connected with the sending clamp proximal end driving member. In the first state, the switching mechanism drives the sending clamp proximal end driving member to move, and then drives the sending clamp distal end driving member to move. The sending clamp distal end driving member comprises a base 240 and a sending clamp assembly, and the base 240 is provided with a channel. In the first state, the switching mechanism is combined with the sending clamp proximal end driving member to drive the sending clamp proximal end driving member to move, and then drives the sending clamp assembly to move in the channel to drive the clamp to enter the jaw assembly. More specifically, the distal end of the channel is provided with a guide inclined surface 243, the sending clamp proximal end driving member drives the sending clamp assembly to move in the channel and pass through the guide inclined surface 243 to abut against the first clamp in the clamp box 220, and then drives the first clamp to enter the jaw assembly. In the embodiment, the sending clamp proximal end driving member is a sending clamp driving pipe 402, which is fixedly connected with the sending clamp assembly, and part of the sending clamp driving pipe 402 is located in the jaw driving pipe 432 and can move in the jaw driving pipe 432. The base 240 is located outside the clamp box 220, the first end thereof is fixedly connected with the shell 321 and located in the sending clamp driving pipe 402, the second end thereof extends from the first end to the distal end, and the second end is fixedly connected with the tab outside the clamp box 220 through the pin column 316. The sending clamp assembly comprises a sending clamp rod 233, an elastic push rod 232 and a sending clamp block 231 connected in sequence. Specifically, the proximal end of the sending clamp rod 233 has a bent part 406, the distal end of the sending clamp driving pipe 402 has a hole 404 matched therewith for accommodating the bent part 406 of the sending clamp rod 233, and the bent part 406 of the proximal end of the sending clamp rod 233 is installed in the hole 404 at the distal end of the sending clamp driving pipe 402 through the proximal end of the channel of the base 240. The distal end of the sending clamp rod 233 has a receiving groove 408, the proximal end of the elastic push rod 232 has a clamping part 410 matched with the receiving groove 408, the clamping part 410 is inserted into the receiving groove 408 to realize the connection between the elastic push rod 232 and the sending clamp rod 233, the distal end of the elastic push rod 232 has an arc-shaped recess 412, and the lug 414 at the proximal end of the sending clamp block 231 is matched with the arc-shaped recess 412 to realize the connection between the elastic push rod 232 and the sending clamp head. The channel of the base 240 provides a space for accommodating the sending clamp assembly, and also facilitates the movement of the sending clamp assembly in the channel. The sending clamp driving pipe 402 drives the sending clamp block 231 to move in the channel and pass through the guide inclined surface 243 to abut against the clamp, and then drives the clamp to enter the jaw assembly. In order to enhance the strength of the elastic push rod 232 and improve the stability of the sending clamp, two or more elastic push rods 232 are arranged, and each elastic push rod 232 is composed of multiple laminated pieces. The elastic push rod 232 itself has elasticity and can be deformed and bent, so that the sending clamp block 231 can send the clamp to the right position. For the corresponding structure of the sending clamp block 231, the clamp and the clamp box 220, refer to the detailed description above, which will not be described here. The sending clamp driving mechanism further comprises a first reset member 418, such as an elastic element.One end of the elastic element abuts against the rib 436 of the inner wall of the jaw drive tube 432 near the clamp delivery drive tube 402, and the other end extends backward and abuts against the distal end surface of the clamp delivery drive tube 402. The elastic element is used to store energy when the clamp delivery drive mechanism moves forward. The elastic element restores its deformation and releases the energy, thereby providing power for the reset of the clamp delivery drive mechanism.

[0110] The clip applier also includes a knob 310, wherein the proximal end of the knob 310 has a protrusion 312. The distal end of the operating assembly 300 is provided with a recessed portion that matches the protrusion 312. The recessed portion and the protrusion 312 cooperate to assemble the knob 310 and the operating assembly 300. The knob 310 is provided with a pin 316. The clip drive tube 402 is provided with a first waist-shaped hole 420, and the jaw drive tube 432 is provided with a second waist-shaped hole 448. The proximal end of the base 240 is accommodated in the clip drive tube 402 and is provided with a first pin hole 416. The pin 316 and the first pin hole 416 cooperate to securely attach the base 240 to the knob 310. The proximal end of the cartridge 220 is also accommodated in the clip drive tube 402 and is provided with a second pin hole. The pin 316 and the second pin hole cooperate to securely attach the cartridge 220 to the knob 310. One end of the pin 316 is mounted at a first location on the side wall of the knob 310, and the other end passes through the second waist-shaped hole 448, the first pin hole 416, the second pin hole, and the first waist-shaped hole 420, and is then mounted at another location on the side wall of the knob 310 symmetrical to the first location. This allows the knob 310 to rotate, thereby driving the jaw drive tube 432, the clip delivery drive tube 402, the base 240, and the clamp cartridge 220 to rotate together. This, in turn, drives the cannula 210, the jaw assembly, and the clip delivery assembly to rotate together, allowing the surgeon to adjust the angle to the appropriate clamping angle for the blood vessel or tissue. Furthermore, due to the presence of the first waist-shaped hole 420 and the second waist-shaped hole 448, the forward movement of the clip delivery drive tube 402 and the jaw drive tube 432 is not affected by the pin 316. The knob 310 drives the clip delivery drive mechanism and the jaw drive mechanism to rotate 360 ​​degrees. To enhance the doctor's feel when turning the knob 310 and to ensure that it remains in the current position after turning at any angle, facilitating operation, a damping member 318 is provided at the connection between the knob 310 and the handle assembly. More specifically, a groove 314 is provided on the outer periphery of the protrusion 312 at the proximal end of the knob 310. The inner side of the damping member 318 is accommodated in the groove 314, and the outer side abuts against the recessed portion of the handle assembly. The friction between the damping member 318 and the handle assembly increases the force required to turn the knob 310 and ensures that it remains in the current position after turning at any angle. The damping member 318 is a rubber ring.

[0111] The following is a detailed description of the working process of the clip applier of this embodiment to achieve clip delivery and jaw assembly closing:

[0112] When the operator presses the actuating member 330, the actuating member 330 is moved from the open position to the intermediate position to push the switching mechanism to drive the clip feeding drive mechanism forward, and the proximal end of the clip feeding drive tube 402 and the distal end of the switching mechanism gradually approach the proximal end of the jaw drive tube 432; when the actuating member 330 is moved to the intermediate position, the moving part of the switching mechanism runs onto the second guide surface 496 in the housing 321, the clamping block 482 is disengaged from the clamping groove of the clip feeding drive tube 402, the switching mechanism is separated from the clip feeding drive mechanism, the forward movement of the clip feeding drive mechanism is completed, the clip located at the farthest end of the clip box 220 is fed into the jaw assembly (the clip feeding action is completed), and the distal end surface 508 of the switching mechanism abuts against the proximal end surface of the jaw drive mechanism. The retreat prevention end 354 of the clip feeding retreat prevention mechanism can abut against the clip feeding drive tube 402 after the switching mechanism is separated from the clip feeding drive mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip feeding drive mechanism. The actuating member 330 is continuously pressed, and the actuating member 330 is moved from the intermediate position to the closed position, and the clip feeding retreat prevention mechanism gradually disengages from the clip feeding drive tube 402; the switching mechanism drives the jaw drive mechanism forward under the action of the actuating member 330, the jaw drive tube 432 drives the sleeve 210 to advance to close the jaw assembly, and when the actuating member 330 is moved to the closed position, the forward movement of the jaw drive mechanism is completed (the jaw closing action is completed), the clip feeding retreat prevention mechanism is completely disengaged from the clip feeding drive tube 402, and the clip feeding drive tube 402 is reset under the action of the first reset member 418. The actuating member 330 is released, and the jaw drive mechanism is reset under the action of the second reset member 446. When the actuating member 330 is moved from the open position to the intermediate position, the guide part 351 of the clip feeding retreat prevention mechanism is relatively moved to the locking point b in the guide channel 340 of the actuating member 330, and the actuating member 330 is unidirectionally locked, that is, the actuating member 330 can only be moved toward the closed position under the action of an external force, and cannot be moved toward the open position, so that the doctor can clearly know that the clip feeding action has been completed, and on the other hand, after the clip applier completes the clip feeding action, the doctor can stop and find the blood vessel or tissue and then continue to operate the actuating member 330 to perform the jaw closing action.

[0113] In the embodiment, the transmission mechanism further comprises a pusher 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 feeding driving mechanism drives the farthest clip of the clip box 220 to move forward into the jaw assembly; in the third state, the pusher driving mechanism drives the remaining clips in the clip box 220 to move forward by one station. Here, the “farthest clip” refers to the “first clip” described above, and the “remaining clip” refers to the “other clip” described above. In the embodiment, the clip applier can not only continuously apply clips, but also effectively avoid the interference problem of the clip feeding action and the clip pushing action because the first state and the third state are at different times, the clip feeding action performed by the clip feeding driving mechanism is asynchronous with the clip pushing action performed by the pusher driving mechanism. At the same time, because the clip feeding driving mechanism and the pusher driving mechanism are independent driving mechanisms, the design space is increased, and the structure of the clip feeding driving mechanism and the pusher driving mechanism is stable and reliable. Therefore, the technical solution of the embodiment is more stable and reliable for performing the clip feeding and pushing actions, and the safety of the clip applier is improved.

[0114] In the embodiment, the transmission mechanism comprises a driving member and an adapter mechanism. The driving member is in abutment with the actuating member 330 to receive power, and the adapter mechanism is connected to the driving member at one end and to the pusher drive mechanism at the other end. The driving member is used to drive the pusher drive mechanism to advance the farthest end of the clip box 220 to move the clips into the jaw assembly, and is also used to drive the adapter mechanism to move to drive the pusher drive mechanism to retreat to store energy. The pusher drive mechanism comprises a third return member for storing the energy. When the energy is released, the pusher drive mechanism advances under the action of the third return member to move the remaining clips in the clip box 220 to the next position. That is, through the adapter mechanism, when the pusher drive mechanism retreats to store energy, the pusher drive mechanism retreats. The pusher drive mechanism performs a pusher action and the pusher drive mechanism performs a pusher action out of sync. The driving member is the switching mechanism described above, which is used to selectively drive the pusher drive mechanism or the jaw drive mechanism. In the first state, the driving member is separated from the jaw drive mechanism and combined with the pusher drive mechanism to drive the pusher drive mechanism to advance, while driving the adapter mechanism to move to drive the pusher drive mechanism to retreat to store the first energy. In the second state, the driving member is combined with the jaw drive assembly to drive the jaw drive mechanism to advance, and is separated from the pusher drive mechanism, while driving the adapter mechanism to move to drive the pusher drive mechanism to retreat to store the second energy. The first energy and the second energy together constitute the energy described above. In the third state, the pusher drive mechanism advances under the action of the energy to move the remaining clips in the clip box 220 to the next position. That is, the pusher drive mechanism is connected to the switching mechanism through the adapter mechanism, and the pusher drive mechanism and the switching mechanism move in opposite directions. Under the action of the actuating member 330, the switching mechanism is first separated from the jaw drive mechanism and combined with the pusher drive mechanism to drive the pusher drive mechanism to advance to perform a pusher action, and then separated from the pusher drive mechanism and combined with the jaw drive mechanism to drive the jaw drive mechanism to advance to perform a jaw closing action. When the switching mechanism drives the pusher drive mechanism and the jaw drive mechanism to advance, the adapter mechanism is also driven to move to drive the pusher mechanism to retreat and store energy. When the actuating member 330 is released, the pusher drive mechanism advances under the action of the third return member to perform a pusher action. How the switching mechanism is combined with and separated from the pusher drive mechanism and the jaw drive mechanism has been described above and will not be described here.

[0115] In another embodiment, the driving member does not have the clutch function, the driving member is connected with the clip feeding driving mechanism and the clip pushing driving mechanism respectively, the actuating member 330 comprises a first actuating member and a second actuating member, the first actuating member is in abutment with the driving member, and the second actuating member is in abutment with 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 to move the clip at the farthest end of the clip box 220 into the jaw assembly, and simultaneously drives the adapter mechanism to move to drive the clip pushing driving mechanism to retreat to store energy; the clip pushing driving mechanism comprises a third reset member for storing the energy. In the third state, the first actuating member is released, and the clip pushing driving mechanism advances under the action of the third reset member to move the remaining clips in the clip box 220 to the next position. After the first actuating member is released, the second actuating member is pressed to drive the jaw driving assembly to close the jaw assembly. Of course, the second actuating member can also be pressed to drive the jaw driving assembly to close the jaw assembly before the first actuating member is released and the clip feeding action is completed, and when the jaw assembly is closed, the first actuating member is released to make the clip pushing driving mechanism advance under the action of the third reset member to move the remaining clips in the clip box 220 to the next position.

[0116] The jaw driving mechanism is sleeved on the clip feeding driving mechanism, in the first state, the proximal end surface of the clip feeding driving mechanism gradually approaches the proximal end surface of the jaw driving mechanism, and the distal end surface 508 of the driving member gradually approaches the proximal end surface of the jaw driving mechanism; in the second state, the proximal end surface of the jaw driving mechanism gradually moves away from the proximal end surface of the clip feeding driving mechanism, and the distal end surface 508 of the driving member is in abutment with the proximal end surface of the jaw driving mechanism. For the structure, positional relationship, etc. of the jaw driving mechanism and the clip feeding driving mechanism, refer to the foregoing content, and details are not described herein.

[0117] The adapter mechanism comprises a first adapter member, an intermediate member and a second adapter member, the first adapter member is connected with the driving member, and the second adapter member is connected with the clip pushing driving mechanism; the first adapter member drives the second adapter member through the intermediate member, and the movement direction of the first adapter member is opposite to that of the second adapter member; the driving member drives the first adapter member to advance; when the first adapter member advances, the second adapter member retreats to drive the clip pushing driving mechanism to retreat. For the structure of the adapter mechanism, detailed description will be given below.

[0118] The push-clamp driving mechanism further comprises a push-clamp driving member. The push-clamp driving member is connected with the adapter mechanism and the third reset member. Specifically, one end of the third reset member is connected with the housing 321, and the other end is connected with the proximal end of the second adapter member. It is understood that the third reset member can also be directly connected with the push-clamp driving member. The push-clamp driving member is connected with the distal end of the second adapter member. The push-clamp driving member is spaced apart in the longitudinal direction and is provided with a plurality of side cavities 252. Each side cavity 252 is correspondingly provided with a push-clamp block 253. The push-clamp driving member drives the push-clamp block 253 to move under the action of the third reset member, so as to move the remaining clips in the clip box 220 to the next position. More specifically, the push-clamp driving member comprises a push-clamp proximal end driving member and a push-clamp distal end driving member. The push-clamp distal end driving member is the push-clamp assembly or the push-clamp seat 250 described above. The third reset member can be an elastic element, such as a spring. In this embodiment, the push-clamp proximal end driving member is an adapter block 452. The push-clamp distal end driving member comprises a push-clamp rod 251 and a push-clamp block 253. The proximal end of the adapter block 452 is connected with the distal end of the second adapter member. The distal end of the adapter block 452 is connected with the push-clamp rod 251. A plurality of side cavities 252 are provided at equal intervals along the direction of the push-clamp rod 251. Each side cavity 252 is correspondingly provided with a push-clamp block 253. It is understood that the side cavities can also be provided at unequal intervals. Each push-clamp block 253 is deflectably arranged in the corresponding side cavity 252 of the push-clamp rod 251 by an elastic element 254, such as a spring. Specifically, the proximal end of the push-clamp block 253 is arranged in the pin hole of the upper and lower walls of the side cavity 252 by a rotating shaft. The elastic element 254 is arranged in the side cavity 252. The proximal end of the elastic element 254 is connected with the proximal end of the side cavity 252, and the distal end of the elastic element 254 is connected with the proximal end of the push-clamp block 253. In the initial state, the distal end of the push-clamp block 253 is inclined downward under the action of the elastic element 254, away from the rod body of the push-clamp rod 251. The distal end of each push-clamp block 253 abuts against the tail end of the corresponding clip in the clip box 220. When the push-clamp rod 251 retreats, the push-clamp block 253 is turned upward around the rotating shaft toward the rod body of the push-clamp rod 251 under the upward force of the clip. Therefore, when the push-clamp rod 251 retreats, the push-clamp block 253 does not interfere with the clip. When the retreat action of the push-clamp rod 251 is completed, each push-clamp block 253 moves to abut against the tail of the clip adjacent to the proximal end thereof or moves to a predetermined distance behind the clip adjacent to the proximal end thereof. In the third state, the push-clamp rod 251 drives the push-clamp block 253 to advance. When the push-clamp block 253 advances, it pushes the remaining clips in the clip box 220 to advance to the next position, thereby preparing for the next clip feeding.

[0119] In order to fully utilize the space inside the clip applier, make the structure of the clip applier more compact, and make the center of gravity of the clip applier more stable and more convenient to operate, the clip feeding proximal end driving member is sleeved on the push-clamp proximal end driving member, and the clip feeding distal end driving member is located on the two sides of the clip box 220 with the push-clamp distal end driving member.

[0120] As described above, the jaw driving mechanism includes a jaw driving tube 432 and a sleeve 210 connected to the jaw driving tube 432, the jaw driving tube 432 drives the sleeve 210 to move, thereby driving the jaw assembly to move; the clip feeding driving mechanism includes a clip feeding driving tube 402 and a clip feeding assembly connected to the clip feeding driving tube 402, the clip feeding driving tube 402 drives the clip feeding assembly to move, thereby driving the clip box 220 to move to the farthest end of the clip box 220. In order to make the overall structure of the transmission mechanism more compact, fully utilize the space, and reduce the overall volume of the clip applier, the clip feeding driving mechanism, the jaw driving mechanism and the clip pushing driving mechanism are arranged in the longitudinal direction. The projection of the clip feeding driving tube 402 in the plane perpendicular to the longitudinal direction is located in the projection of the jaw driving tube 432 in the plane, the clip feeding driving mechanism can move in the jaw driving mechanism along the longitudinal direction, the projection of the jaw driving tube 432 in the plane perpendicular to the longitudinal direction is located in the projection of the driving member (i.e. the switching mechanism) in the plane; the projection of the clip pushing proximal end driving member in the plane is located in the projection of the clip feeding driving tube 402 in the plane, the clip pushing driving mechanism can move in the clip feeding driving mechanism along the longitudinal direction, the clip pushing distal end driving member and the clip feeding assembly are located on both sides of the clip box 220. Further, the clip feeding proximal end driving member, the clip pushing proximal end driving member and the jaw driving tube 432 are coaxial. Specifically, the clip feeding driving tube 402 is located in the jaw driving tube 432, the clip pushing proximal end driving member is located in the clip feeding driving tube 402 and can move in the clip feeding driving tube 402, more specifically, the proximal end of the adapter block 452 is located in the clip feeding driving tube 402, the clip pushing rod 251 and the clip feeding assembly are located on both sides of the clip box 220. For the structure and position of the clip box 220, please refer to the foregoing description.

[0121] As described above, the clip applier includes a knob 310, a pin 316 is arranged in the knob 310, one end of the pin 316 is installed at a first position of the side wall of the knob 310, the other end of the pin 316 passes through the proximal end driving member of the jaw driving mechanism, the proximal end driving member of the clip feeding driving mechanism, the base 240, the clip box 220 and is installed at another position of the side wall of the knob 310 which is symmetrical to the first position; the proximal end driving member of the jaw driving mechanism is provided with a second waist-shaped hole 448, the proximal end driving member of the clip feeding driving mechanism is provided with a first waist-shaped hole 420, the base 240 is provided with a first pin hole 416, and the clip box 220 is provided with a second pin hole. In order to make the clip pushing driving mechanism also rotate with the knob 310, the proximal end driving member of the clip pushing driving mechanism is provided with a third waist-shaped hole 458 for accommodating the pin 316, one end of the pin 316 is installed at the first position of the side wall of the knob 310, the other end of the pin 316 passes through the first waist-shaped hole 420, the second waist-shaped hole 448, the first pin hole 416, the second pin hole and the third waist-shaped hole 458 and 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 clip feeding driving mechanism, the clip box 220 and the clip pushing driving mechanism can rotate with the knob 310.

[0122] The working process of the clip feeding, the jaw assembly closing and the clip pushing by the clip applier is described in detail as follows:

[0123] The operator presses the actuating member 330 to move the actuating member 330 from the open position to the intermediate position, and the driving member (i.e. the switching mechanism) drives the clip feeding driving mechanism to advance under the action of the actuating member 330, while driving the matching mechanism to drive the clip pushing driving mechanism to retreat. When the clip pushing driving mechanism retreats, the third reset member of the clip pushing driving mechanism stores energy. 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 actuating member 330 moves to the intermediate position, the moving member of the driving member runs onto the second guide surface 496 in the housing 321, the clamping block 482 is disengaged from the clamping groove of the clip feeding driving tube 402, the driving member is separated from the clip feeding driving mechanism, the forward movement of the clip feeding driving mechanism is completed, the clip at the farthest end of the clip box 220 is fed into the jaw assembly (the clip feeding action is completed), and the distal end surface 508 of the driving member abuts against the proximal end surface of the jaw driving mechanism. The retreat preventing end 354 of the clip feeding retreat preventing mechanism can abut against the clip feeding driving tube 402 after the driving member is separated from the clip feeding driving mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip feeding driving mechanism. The operator continues to press the actuating member 330 to move the actuating member 330 from the intermediate position to the closed position, and the clip feeding retreat preventing mechanism gradually disengages from the clip feeding driving tube 402. The driving member drives the jaw driving mechanism to advance under the action of the actuating member 330, while continuing to drive the matching mechanism to drive the clip pushing driving mechanism to retreat. When the clip pushing driving mechanism retreats, the third reset member of the clip pushing driving mechanism continues to store energy, and the jaw driving tube 432 drives the sleeve 210 to advance to close the jaw assembly. Until the actuating member 330 moves to the closed position, the forward movement of the jaw driving mechanism is completed (the jaw closing action is completed), the third reset member stops storing energy, the clip feeding retreat preventing mechanism completely disengages from the clip feeding driving tube 402, and the clip feeding driving tube 402 is reset under the action of the first reset member 418. The actuating member 330 is released, the jaw driving mechanism is reset under the action of the second reset member 446, and the clip pushing driving mechanism advances under the action of the third reset member to move the remaining clips in the clip box 220 to the next position (the clip pushing action is completed).

[0124] The matching mechanism is described in detail as follows.

[0125] The adapter mechanism comprises a first adapter, an intermediate piece and a second adapter, the first adapter drives the second adapter through the intermediate piece; the firing drive mechanism is connected with the first adapter; the continuous firing drive mechanism is connected with the second adapter; the movement direction of the first adapter is opposite to the movement direction of the second adapter, wherein the firing drive mechanism comprises the aforementioned clip feeding drive mechanism and the jaw drive mechanism, for completing the clip feeding action and the clipping action (jaw closing action), the continuous firing drive mechanism is the aforementioned clip pushing drive mechanism, for completing the clip pushing action. Here, the connection means that the two moving parts are connected, the movement directions of the two are the same, and they move synchronously. The clip feeding drive mechanism and the clip pushing drive mechanism are independent drive mechanisms, which increases the design space and enables more reliable and stable execution of the clip feeding and pushing actions. The adapter mechanism realizes the asynchronization of the clip pushing action, the clip feeding action and the clipping action, effectively avoids the interference problem of the clip feeding action and the clip pushing action, and further effectively improves the safety and reliability of the clipping forceps.

[0126] The firing drive mechanism is connected with the first adapter through the switching mechanism, and the switching mechanism is used for selectively driving the clip feeding drive mechanism and the jaw drive mechanism; specifically, the proximal end of the switching mechanism is fixedly connected with the first adapter, and the switching mechanism is detachably connected with the firing drive mechanism. Pressing the aforementioned actuator 330, the switching mechanism drives the clip feeding drive mechanism to move forward first to execute the clip feeding action and then drives the jaw drive mechanism to move forward to execute the clipping action, while driving the first adapter to move forward, and further driving the continuous firing drive mechanism to retreat to store energy; the continuous firing drive mechanism comprises a third return member, which is used for storing the energy; releasing the actuator 330, the continuous firing drive mechanism moves forward under the action of the third return member to execute the clip pushing action. The structure, positional relationship and connection relationship of the switching mechanism, the clip feeding drive mechanism, the jaw drive mechanism and the clip pushing drive mechanism are the same as those described above, and will not be repeated here.

[0127] The first adapter comprises an upper rack gear 462, the second adapter comprises a lower rack gear 468, and the intermediate piece comprises a first gear wheel 464 and a second gear wheel 466; the upper rack gear 462 is engaged with the first gear wheel 464, the lower rack gear 468 is engaged with the second gear wheel 466, the first gear wheel 464 is coaxially arranged with the second gear wheel 466, and the diameter of the first gear wheel 464 is greater than the diameter of the second gear wheel 466, that is, the firing drive mechanism is connected with the upper rack gear 462 through the switching mechanism, the continuous firing drive mechanism is connected with the lower rack gear 468, and the movement directions of the upper rack gear 462 and the lower rack gear 468 are opposite; when the upper rack gear 462 moves by a first distance in a first direction, the lower rack gear 468 moves by a second distance in a direction opposite to the first direction, that is, when the firing drive mechanism moves by the first distance in the first direction, the continuous firing drive mechanism moves by the second distance in the second direction opposite to the first direction, and the first distance is greater than the second distance. Wherein, the first direction is the forward direction of the clip feeding drive mechanism and the jaw drive mechanism. In the process of advancing the first distance, the firing drive mechanism needs to complete the clip feeding action and the clip applying action, while the continuous firing drive mechanism stores energy in the process of retreating the second distance, and then advances to complete the clip pushing action after the release actuator 330 is released. The distance of the retreat is equal to the distance of the advance, and the distance of the advance is equal to the distance of the forward movement of the clips in the clip box 220 by one position, and the second distance of the retreat is less than the first distance of the firing drive mechanism, so that the clips in the clip box 220 can be arranged more closely, that is, more clips can be accommodated in the clip box 220, the number of continuous clip applying times is increased, and the surgical needs of the doctor are met.

[0128] In order to make the layout of the adapter mechanism more reasonable and the structure more compact, the first adapter and the second adapter are arranged in the longitudinal direction, and the intermediate piece is arranged between the first adapter and the second adapter and arranged in the direction perpendicular to the longitudinal direction.

[0129] In order to make the overall structure more compact, the continuous firing drive mechanism and the second adapter move in the longitudinal direction in the clip feeding drive mechanism. The axis of the first adapter is perpendicular to the axis of the intermediate piece and parallel to the axis of the second adapter; the axis of the second adapter is coaxial with the axis of the proximal driving piece (adapter block 452) of the continuous firing drive mechanism and the axis of the proximal driving piece (clip feeding drive tube 402 and jaw drive tube 432) of the firing drive mechanism. In order to make the movement of the first adapter and the second adapter more stable without shaking, the first guide slot 472 and the second guide slot 474 are arranged in the housing 321, the first adapter moves in the first guide slot 472, and the second adapter moves in the second guide slot 474.

[0130] From the foregoing, the continuous shooting driving mechanism includes a push-clamp driving member and a third reset member, the push-clamp driving member is connected with the distal end of the second adapter; the push-clamp driving member is spaced apart in the longitudinal direction and is provided with a plurality of side cavities 252, each side cavity 252 is correspondingly provided with a push-clamp block 253, the push-clamp driving member is moved under the action of the third reset member to move the push-clamp block 253 to perform the push-clamp action. The third reset member stores energy when the continuous shooting driving mechanism retreats, in order to make the overall structure more compact, and fully utilize the space, the third reset member of the continuous shooting driving mechanism is located in the second guide groove 474, one end is connected with the proximal end of the second adapter, the other end is connected with the shell 321 located at the proximal end of the second guide groove 474.

[0131] In order to make the second adapter connected with the continuous shooting driving mechanism not rotate when the continuous shooting driving mechanism rotates with the knob 310, the distal end of the second adapter has a receiving space, in order to facilitate installation, the receiving space has an opening, the proximal end of the push-clamp driving member is accommodated in the receiving space through the opening and can rotate in the receiving space; the proximal end of the push-clamp driving member has a stop portion 454, which abuts against the limiting surface 470 in the receiving space, so that the continuous shooting driving mechanism and the distal end of the second adapter are axially fixed.

[0132] The working process of the transmission mechanism of the clip applier to perform the clip feeding action, the clip applying action and the push-clamp action will be described in detail below in combination with the adapter mechanism:

[0133] When the operator presses the actuating member 330, the actuating member 330 moves from the open position to the intermediate position, the switching mechanism drives the pusher driving mechanism and the first adapter to advance under the action of the actuating member 330, and the first adapter drives the second adapter to retreat through the intermediate member. Since the second adapter is connected with the pusher driving mechanism, the pusher driving mechanism is driven to retreat, and the third reset member 456 of the pusher driving mechanism is energized. During the process, the proximal end of the pusher driving tube 402 and the distal end of the switching mechanism gradually approach the proximal end of the jaw driving tube 432. When the actuating member 330 moves to the intermediate position, the moving member of the switching mechanism runs onto the second guide surface 496 in the housing 321, the clamping block 482 of the switching mechanism is separated from the clamping groove of the pusher driving tube 402, the switching mechanism is separated from the pusher driving mechanism, and the forward movement of the pusher driving mechanism is completed (the pusher action is completed). The retreat prevention end 354 of the pusher stop mechanism can abut against the pusher driving tube 402 after the switching mechanism is separated from the pusher driving mechanism to prevent the clips in the jaw assembly from retreating due to the retreat of the pusher driving mechanism. Continue to press the actuating member 330, the actuating member 330 moves from the intermediate position to the closed position, and the pusher stop mechanism gradually separates from the pusher driving tube 402. The switching mechanism continues to drive the jaw driving mechanism and the first adapter to advance under the action of the actuating member 330, and the first adapter continues to drive the second adapter to retreat through the intermediate member. Since the second adapter is connected with the pusher driving mechanism, the pusher driving mechanism continues to retreat, and the third reset member 456 of the pusher driving mechanism continues to be energized. The jaw driving tube 432 drives the sleeve 210 to advance to close the jaw assembly (the clamping action is completed), the third reset member 456 is de-energized, the pusher stop mechanism is completely separated from the pusher driving tube 402, and the pusher driving tube 402 is reset under the action of the first reset member 418. Release the actuating member 330, the jaw driving mechanism is reset under the action of the second reset member 446, and the pusher driving mechanism advances to move the remaining clips in the clip box 220 by one position (the pusher action is completed).

[0134] In the embodiment, the pusher driving mechanism is used to drive the clips at the farthest end of the clip box 220 to move into the jaw assembly, and the pusher driving mechanism is used to drive the remaining clips in the clip box 220 to move by one position. The pusher driving mechanism includes a pusher proximal end driving member and a pusher distal end driving member connected with the pusher proximal end driving member. The movement trajectory of the pusher proximal end driving member is parallel to the movement trajectory of the pusher distal end driving member, and the movement trajectory of the pusher distal end driving member intersects with the movement trajectory of the pusher distal end driving member. Different driving mechanisms are used to perform the pusher action and the pusher action, respectively, which increases the design space and can realize more reliable and stable performance of the pusher action and the pusher action. The pusher action is performed earlier than the pusher action, the two actions are asynchronous, and they do not interfere with each other, thereby effectively improving the safety and reliability of the clip applier.

[0135] It should be noted that in the present embodiment,

[0136] The motion trajectory refers to the motion trajectory formed by each point of the element in the motion process. When the motion trajectory of element A and the motion trajectory of element B are straight lines, if at least one straight line in the motion trajectory of element A is collinear with at least one straight line in the motion trajectory of element B, it is said that the motion trajectory of element A and the motion trajectory of element B are "coaxial"; if all straight lines in the motion trajectory of element A are parallel to all straight lines in the motion trajectory of element B, it is said that the motion trajectory of element A and the motion trajectory of element B are "parallel". The motion trajectory of the element refers to the motion trajectory formed in one execution cycle.

[0137] In the present embodiment, the push-clamp proximal end driving member is movably located in the push-clamp proximal end driving member, the push-clamp distal end driving member and the push-clamp distal end driving member are located on both sides of the clamp box 220, specifically, the push-clamp distal end driving member is located on the side of the clamp box 220 containing the clamps (the inside of the clamp box 220), and the push-clamp distal end driving member is located on the side of the clamp box 220 not containing the clamps (the outside of the clamp box 220). As known from the foregoing, the push-clamp proximal end driving member advances in the longitudinal direction and drives the push-clamp distal end driving member to move from the outside of the clamp box 220 to the plane where the clamps are located and abut against the clamps farthest from the clamp box 220, and then pushes the clamps to advance to the jaw assembly. When the push-clamp driving mechanism retreats, the push-clamp proximal end driving member drives the push-clamp distal end driving member to return to the original position along the original path. The push-clamp proximal end driving member retreats in the longitudinal direction and drives the push-clamp distal end driving member to retreat, and when the push-clamp distal end driving member retreats, the distal end thereof moves from the position abutting against the corresponding clamps to the rear of the clamps adjacent to the proximal end of the clamp box 220. When the push-clamp proximal end driving member advances in the longitudinal direction, it drives the push-clamp distal end driving member to advance to push the remaining clamps in the clamp box 220 to move one station. Therefore, during the movement of the transmission mechanism, the motion trajectory of the push-clamp distal end driving member intersects with the motion trajectory of the push-clamp distal end driving member, wherein the motion trajectory of the element intersects, including the intersection of the motion trajectory of the element itself, and the intersection of the extension line of the motion trajectory of the element, the motion trajectory of the push-clamp proximal end driving member is parallel to the motion trajectory of the push-clamp proximal end driving member.

[0138] In the embodiment, the sending clamp proximal end driving member is sleeved on the pushing clamp proximal end driving member, so that the structure of the transmission mechanism is more compact and the space is fully utilized. The sending clamp driving mechanism and the pushing clamp driving mechanism can move in the jaw driving mechanism. The jaw driving mechanism advances or retreats along the longitudinal direction, and the movement track thereof is parallel to the movement track of the sending clamp proximal end driving member or the movement track of the pushing clamp proximal end driving member, and intersects with the movement track of the sending clamp distal end driving member or the movement track of the pushing clamp distal end driving member. The jaw driving mechanism comprises a jaw driving pipe 432 and a sleeve 210 connected with the jaw driving pipe 432, and the sleeve 210 is driven by the jaw driving pipe 432 to move to close the jaw assembly. The movement track of the jaw driving pipe 432 and the movement track of the sleeve 210 jointly constitute the movement track of the jaw driving mechanism. Such a design makes the layout of the transmission mechanism reasonable and the structure compact.

[0139] The sending clamp proximal end driving member comprises a sending clamp driving pipe 402, and the sending clamp distal end driving member comprises a sending clamp block 231. The sending clamp block 231 is used to drive the clamps to enter the jaw assembly. The pushing clamp proximal end driving member comprises a matching block 452, and the pushing clamp distal end driving member comprises a pushing clamp block 253. The pushing clamp block 253 is used to drive the remaining clamps in the clamp box 220 to move forward by one position. The movement track of the sending clamp driving pipe 402 is parallel to the movement track of the matching block 452 and the movement track of the jaw driving mechanism, and the movement track of the sending clamp block 231 intersects with the movement track of the pushing clamp block 253 and the movement track of the jaw driving mechanism. In order to make the overall structure more compact, the matching block 452 is partially located in the sending clamp driving pipe 402 and can move in the sending clamp driving pipe 402 along the longitudinal direction. The proximal end of the sending clamp driving pipe 402 is located in the jaw driving pipe 432 and can move in the jaw driving pipe 432 along the longitudinal direction.

[0140] The sending clamp block 231 is connected with the sending clamp driving pipe 402 through a sending clamp rod 233. The sending clamp driving mechanism further comprises a base 240 fixed to the shell 321, and the base 240 is slidably connected with the sending clamp rod 233. The distal end of the base 240 is provided with a guide inclined surface 243, which is used to guide the sending clamp block 231 to be pushed out of the base 240 to drive the most distal clamps in the clamp box 220. The movement track of the sending clamp rod 233 is parallel to the movement track of the jaw driving mechanism. The pushing clamp block 253 is connected with the matching block 452 through a pushing clamp rod 251, and a plurality of side cavities 252 are arranged on the pushing clamp rod 251 along the direction of the rod body. One pushing clamp block 253 is installed in each side cavity 252. The movement track of the pushing clamp rod 251 is parallel to the movement track of the jaw driving mechanism. Such a design makes the overall layout reasonable and the space fully utilized.

[0141] The movement track of the sending clamp block 231 and the movement track of the pushing clamp block 253 will be described in detail below. Please refer to FIG. 23A and FIG. 23B, is a schematic diagram of the movement process and movement trajectory of the clamp feeding block 231 when the clamp feeding drive mechanism moves forward; As can be seen from the above, the clamp feeding block 231 moves on the first plane where the base 240 is located to the guide slope 243 at the far end of the base 240, and then moves along the guide slope 243 to the second plane where the clip is located and abuts against the farthest clip of the clip box 220. Its movement process is as follows FIG. 23A As shown, we can derive the motion trajectory diagram of any point on it as follows FIG. 23B As shown. FIG. 24A and FIG. 24B The figure shows the motion process and trajectory of the clamping block 253 when the clamping drive mechanism retreats. As can be seen from the above, the clamping block 253 retreats with the clamping drive mechanism. When it retreats to the clamp adjacent to its proximal end, the distal end of the clamping block 253 is forced upward by the clamp to flip upward around the rotation axis. When the distal end of the clamping block 253 continues to retreat and reaches the rear of the clamp adjacent to its proximal end, the distal end of the clamping block 253 flips downward to its original position under the action of the spring. The motion process is shown in FIG. FIG. 24A As shown, the motion trajectory of the clamping block 253 can be obtained. Taking the distal end point E of the clamping block 253 as an example, the motion trajectory diagram formed is shown as follows: FIG. 24B It should be noted that this is only a schematic indication, and the motion trajectory may be adjusted according to the actual specific design, such as the curvature of the curve. It can be seen that during the movement of the transmission mechanism, the motion trajectory of the clamping block 231 intersects with the motion trajectory of the clamping push block 253.

[0142] The transmission mechanism also includes a switching mechanism and a matching mechanism. The switching mechanism is used to selectively drive the clip feeding drive mechanism or the jaw drive mechanism. The matching mechanism is connected to the switching mechanism at one point and to the clamp pushing drive mechanism at another point, with a distance between the one point and the other point. Under the action of the actuator 330, the switching mechanism sequentially drives the clip feeding drive mechanism and the jaw drive mechanism to move in a first direction, while simultaneously driving the matching mechanism to drive the clamp pushing drive mechanism to move in a second direction to store energy, wherein the first direction is opposite to the second direction. The clamp pushing drive mechanism includes a third reset member 456 for storing this energy. When the actuator 330 is released, the clamp pushing drive mechanism advances under the action of the third reset member 456 to move the remaining clips in the clip cartridge 220 forward one station. The motion trajectory of the switching mechanism is coaxial with the motion trajectory of the jaw drive mechanism, making full use of space and a more compact structure. The coupling mechanism includes a first coupling member and a second coupling member driven by the first coupling member. The first coupling member is connected to the switching mechanism, and the second coupling member is connected to the push-and-clamp drive mechanism. The motion trajectory of the first coupling member is parallel to that of the jaw drive mechanism, and the motion trajectory of the second coupling member is parallel to that of the jaw drive mechanism. This makes the overall transmission mechanism more compact and fully utilizes space.

[0143] In this embodiment, as shown in FIG. 25 to FIG. 33D The clip applier further has a structure design for achieving special position locking of the wrench, and the specific details are as follows.

[0144] In this embodiment, the wrench is movably connected to the housing 321 of the main body 320, and the wrench movement can be in three special positions: at the initial moment, the user does not operate the wrench, and the wrench is in the open position; at the moment when the user operates the wrench and the clip feeding is completed, the wrench is in the intermediate position; at the moment when the user operates the wrench and the clip applying is completed, the wrench is in the closed position, at which moment the user cannot operate the wrench to move further. From the initial moment, the user keeps operating the wrench, and the wrench moves from the open position to the intermediate position and then to the closed position. The movement of the wrench in the direction towards the closed position is defined as the forward movement of the wrench, and the movement of the wrench from the open position towards the intermediate position and the movement of the wrench from the intermediate position towards the closed position both belong to the forward movement. Correspondingly, the movement of the wrench in the direction towards the open position is defined as the reset movement of the wrench, and the movement of the wrench from the closed position towards the intermediate position and the movement of the wrench from the intermediate position towards the open position both belong to the reset movement. The movement of the wrench from the open position to the intermediate position is defined as the first segment of the forward movement of the wrench, the movement of the wrench from the intermediate position to the closed position is defined as the second segment of the forward movement of the wrench, the movement of the wrench from the closed position to the intermediate position is defined as the second segment of the reset movement of the wrench, and the movement of the wrench from the intermediate position to the open position is defined as the first segment of the reset movement of the wrench. The user operates the wrench to move forward, and in response to the user operation, the wrench moves from the open position to the intermediate position and then to the closed position.

[0145] According to the above description, at least part of the clip feeding drive mechanism and at least part of the jaw drive mechanism are accommodated in the housing 321, such as the clip proximal end drive member and the jaw proximal end drive member described above. The clip feeding drive mechanism and the jaw drive mechanism are connected to the wrench and are driven by the wrench to move forward. The clip feeding drive mechanism drives the clip to move forward into the jaw assembly in response to the movement of the wrench from the open position to the intermediate position. When the wrench is in the intermediate position, the clip is in the preparation position, i.e., the first segment of the forward movement of the wrench drives the clip feeding action and achieves the feeding of the clip to the position. The preparation position is the position where the first clip is stably clamped by the jaw assembly and can be effectively compressed to the closed state. If the clip slides in the jaw assembly so that it is not in the preparation position, the support for the clip during the clip applying process will be insufficient, causing the clip to automatically pop out or twist, resulting in poor compression effect. The jaw drive mechanism drives the jaw drive mechanism to move forward in response to the movement of the wrench from the intermediate position to the closed position, thereby driving the jaw assembly to move in the closed direction. When the wrench is in the closed position, the jaw assembly is in the closed state, i.e., the second segment of the forward movement of the wrench drives the closing action and achieves the closing of the jaw to the bottom and the clip applying to the position. The clip applying to the position is that the clip in the jaw assembly is compressed to the closed state.

[0146] The clip applier of the embodiment can continuously apply multiple clips. To realize continuous clip application, the wrench needs to be reset to the open position to prepare for the next clip application. If the user operates the reset, it is relatively troublesome, resulting in poor user experience. In the embodiment, the clip applier further includes a wrench reset mechanism connected to the wrench. When the user stops operating the wrench, the wrench reset mechanism drives the wrench to make a reset movement, and the direction of the reset movement is opposite to the direction of the forward movement. The wrench reset mechanism includes a resilient element that is compressed and deformed to store energy when the wrench is in forward movement. When the wrench is not operated, the resilient element restores its shape under the action of the accumulated energy to provide a reset force to make the wrench make a reset movement. In the embodiment, the wrench reset mechanism is the third reset member 456 of the push-clip driving mechanism. When the wrench is released, the third reset member 456 makes a reset movement to drive the input member to move backward through the above-mentioned matching structure, so that the driving surface 504 of the input member pushes the wrench to make a reset movement. In another embodiment, in addition to the third reset member 456, the wrench reset mechanism further includes the second reset member 446 of the jaw driving mechanism. During the movement of the wrench from the closed position to the intermediate position, in addition to the third reset member 456 providing a reset force to the handle, the second reset member 446 also provides a reset force to the handle. Specifically, during the movement of the wrench from the closed position to the intermediate position, the jaw driving tube 432 always abuts against the input member. When the second reset member 446 makes a reset movement, it drives the jaw driving tube 432 to retreat, 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 make a reset movement, until the jaw driving tube 432 returns to the position at the initial time and is separated from the input member, and from this time, the third reset mechanism alone provides a reset force to the wrench.

[0147] The doctor operates the wrench in forward motion to sequentially deliver and apply the clip. If there is no clear pause or boundary between the delivery and application of the clip, the doctor will experience poor user experience. The clip applier forceps of this embodiment also include a wrench locking mechanism. The wrench locking mechanism includes a guide member 351 and a guide channel 340 disposed on the wrench and moving with the wrench. The guide channel 340 includes a starting point a, a locking point b, and an end point. At least a portion of the guide member 351 is accommodated in the guide channel 340, and the guide member 351 moves relative to the guide channel 340. In response to the wrench moving from the open position to the intermediate position, the guide member 351 moves relative to the guide channel 340 from the starting point a to the locking point b. In response to the wrench moving from the intermediate position to the closed position, the guide member 351 moves relative to the locking point b to the end point. During the user's forward motion of the wrench, if the wrench is in the intermediate position when not being operated, the guide member 351 prevents the wrench from returning to its original position at the locking point b. The user operates the wrench to move the wrench, driving the guide channel 340 to move, thereby causing the guide channel 340 to move relative to the guide member 351, also referred to as the guide member 351 moving relative to the guide channel 340 or the guide member 351 moving relative to the guide channel 340. The guide channel 340 is a closed channel provided on the wrench, and the guide member 351 cannot escape from the guide channel 340, and thus cannot escape from the wrench. Thus, the locking point b of the wrench locking mechanism can provide a pause point for the clamping and clamping actions. The doctor can observe at this pause point whether the position of the jaw assembly is suitable for the tissue to be clamped, and can adjust the position of the jaw assembly if necessary, thereby improving the user experience; the locking point b is provided by the wrench's own structure, and the structure is simple; the guide channel 340 on the wrench is a closed channel, the moving channel of the guide member 351 is stable, and the locking effect of the wrench is stable.

[0148] Furthermore, in guide channel 340, guide member 351 prevents the wrench from resetting only when it is at locking point b. That is, guide channel 340 provides only one locking point b, which prevents the wrench from resetting. During forward movement, if the wrench is in any position other than the open or intermediate position when operation stops, the wrench reset mechanism will actuate the wrench to reset. This ensures that during operation, the wrench is locked only in the intermediate position to indicate the completion of clamp delivery, without being disturbed by other positions, thus improving the user experience.

[0149] Further, before the handle reaches the closed position, the handle is positively moved between the intermediate position and the closed position. When the handle is stopped, the handle reset mechanism drives the handle to reset to the intermediate position. The guide 351 is moved to the locking point b in response to the handle resetting to the intermediate position, and the guide 351 prevents the handle from continuing to reset at the locking point b. Thus, the only locking point provided by the guide channel 340 for preventing the handle from resetting is fully utilized. When the handle is stopped during the clamping process, the handle is stopped at the intermediate position instead of being directly reset to the open position. This prevents the user from operating the handle beyond the intermediate position and not knowing that the clamping is completed. This provides the user with an opportunity to observe the surgical site and adjust the position of the jaw assembly before the clamping is completed, thereby improving the user experience.

[0150] Further, when the handle reset mechanism drives the handle to reset to the intermediate position, the jaw drive mechanism is also driven to move backward, thereby driving the jaw assembly to open. Whether the handle is moved before or after reaching the closed position, the jaw drive mechanism is driven to move backward and the jaw assembly is driven to open when the second reset movement is performed. In particular, when the handle is not moved to the closed position, the clamping has been started but not completed, the jaw assembly is not closed to the bottom, and the clip is not compressed to the closed state. When the handle is released at this time, the clamping process can be abandoned, the jaw assembly is returned to the open-to-the-bottom state, and the clip is returned to the open state. Subsequent adjustment of the position of the jaw assembly on the tissue will not damage the tissue. This design is safer and more user-friendly.

[0151] The guide channel 340 is a closed groove. The closed groove is a groove surrounded on all sides. The guide 351 is limited from moving out of the groove in all directions, so that the guide 351 cannot escape from the handle in this embodiment. The closed groove provides a fixed movement channel for the guide 351, which is stable in movement. This also makes the locking of the guide 351 and the guide channel 340 at the locking point b stable. In this embodiment, as shown in FIG. 25 The closed groove is a closed groove that penetrates the main body 331 of the handle. In other embodiments, the guide channel 340 can also be a closed groove that does not penetrate the main body 331 of the handle, as long as it provides a closed channel for the guide 351 to move in.

[0152] In this embodiment, as shown in FIG. 25As shown, the wrench includes a wrench body 331, a user-operated pressing portion 332 arranged at one end of the wrench body 331, and a pushing portion 333 arranged at the other end of the wrench body 320, the pushing portion 333 abuts and pushes the clip feeding driving mechanism or the jaw driving mechanism to move. The wrench body 331 is provided with a pivot end 334 pivotally connected with the housing 321 of the main body 320 of the operating assembly 300. A guide channel 340 is arranged on the wrench body 331 and between the pivot end 334 and the pushing portion 333. Thus, the guide channel 340 is located at the middle position of the wrench, further improving the stability of the movement of the guide piece 351, and without the need to design additional structures to arrange the guide channel 340, the structure of the wrench locking mechanism is compact.

[0153] In the embodiment, as shown, FIG. 26 The guide channel 340 includes a main channel 341 and only one sub-channel 343 extending from an opening portion 342 of the main channel 341, the opening portion 342 is located between the two ends of the main channel 341, the two ends of the main channel 341 are respectively provided with a starting point a and an ending point, and the end of the sub-channel 343 away from the opening portion 342 is provided with a locking point b; the wrench body 331 further includes a wrench locking elastic element 355, the wrench locking elastic element 355 applies a force to the guide piece 351 to move out of the main channel 341 and into the sub-channel 343, so that the wrench locking elastic element 355 drives the guide piece 351 to move out of the main channel 341 and into the sub-channel 343. With such a structure, the guide channel 340 only provides one locking point to prevent the wrench from returning to the original position, and when the first positive movement of the wrench does not reach the middle position, if the wrench is released, the wrench will return to the open position and stop, and when the wrench continues to move positively away from the middle position, if the wrench is released before reaching the closed position, the wrench will return to the middle position and be locked at the middle position by the locking point b of the wrench locking mechanism, and cannot continue to return. Thus, when the clip feeding action is completed to the clamping action is completed, the user will feel the pause of the wrench at the middle position, which is unique and uninterrupted, informing the user that the clip feeding is completed and the clamping is not completed, and the user can also adjust the position of the clamping pliers, and the user experience is good.

[0154] The sub-channel 343 includes a blocking wall 344, when the wrench is not operated and the guide piece 351 is located at the locking point b, the guide piece 351 abuts against the blocking wall 344 in the return movement direction of the wrench, thereby preventing the wrench from returning at the locking point b. That is, the blocking wall 344 prevents the guide piece 351 at the locking point b from moving to the starting point a. With the simple channel wall structure design of the sub-channel 343, locking is achieved at the locking point b, without the need for additional elements for locking, and the structure is simple and compact.

[0155] The main channel 341 comprises a first wall extending from the starting point a to the connection with the blocking wall 344, the first wall and the blocking wall 344 being at a right angle or an acute angle. Such a simple angle design of the guiding channel ensures that the blocking wall 344 effectively prevents the guide 351 from disengaging from the locking point b of the channel 343, and when the guide 351 enters the channel 343 from the main channel 341 in the forward movement, it passes through the right angle point or the acute angle point with a collision sound, which clearly reminds the user that the wrench has reached the intermediate position and reminds the user that the clamp is in place at this moment.

[0156] The channel 343 further comprises a guiding wall 345 connected with the blocking wall 344, the guiding wall 345 guiding the bidirectional movement of the guide 351 between the locking point b and the terminal point. The simple channel wall structure design of the channel 343, i.e. the bidirectional movement between the locking point b and the terminal point, ensures that the wrench is not locked in both directions and can be smoothly operated by the user to the closed position or reset to the intermediate position, without the need for additional guiding elements, and the structure is simple and compact.

[0157] The main channel 341 further comprises a second wall extending from the terminal point to the connection with the guiding wall 345, the second wall and the guiding wall 345 being at an obtuse angle. Such a simple angle design of the guiding channel further ensures that the bidirectional movement between the locking point b and the terminal point is achieved, and the wrench is not locked in both directions.

[0158] Specifically, as shown in FIG. 1, the main channel 341 comprises a first wall 342 extending from the starting point a to the connection with the blocking wall 344, the first wall 342 and the blocking wall 344 being at a right angle or an acute angle. FIG. 25As shown, the main channel 341 is a circular arc channel with the pivot end 334 of the wrench as the center, and the channel 343 extends from the opening 342 of the main channel 341 to a direction away from the pivot end 334, i.e. the distance between the channel 343 and the pivot end 334 is greater than the distance between the main channel 341 and the pivot end 334, and the distance between the guide 351 of the main channel 341 and the pivot end 334 is defined as X. Since the main channel 341 is the above-mentioned circular arc channel, the distance X remains unchanged when the guide 351 moves in the main channel 341 (including the start point a and the end point). The distance between the guide 351 and the pivot end 334 when the guide 351 is located in the channel 343 is defined as Y, and Y increases continuously when the guide 351 moves from entering the channel 343 to the locking point b, and Y is always greater than X, and Y0 at the locking point b is the maximum value. From the above, when the wrench moves and the guide 351 only moves relatively in the main channel 341, the guide 351 actually does not move relative to the housing 321. In the present application, the guide channel 340 is not limited to the above shape, and in other embodiments, for example, the main channel 341 is an arc channel, the distances between the two ends of the arc channel and the pivot end 334 are different, but the above-mentioned X of the arc channel is still less than Y, and the above-mentioned wrench locking function is also achieved, and the guide channel 340 structure that can ensure the locking of the locking point b by cooperating with the channel 343 can be easily thought of by those skilled in the art, and is within the protection scope of the present application.

[0159] In the present embodiment, in order to make the "wrench locking elastic element 355 drive the guide 351 to move out of the main channel 341 and enter the channel 343", the wrench locking mechanism further comprises a guide pivot 350, which is accommodated in the housing 321, and the guide pivot 350 comprises a pivot end 352 pivotally connected with the housing 321, a force receiving end 353 extending from the pivot end 352, and the above-mentioned guide 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 force receiving end 353, the guide pivot 350 is driven to rotate around the pivot end 352 as the center, and the guide 351 is also driven to rotate around the pivot end 352 as the center. In this way, the guide pivot 350 defines the circular arc movement track of the guide 351, so as to ensure that the guide 351 can stably switch between the main channel 341 and the channel 343, and further ensure the stability of the wrench locking mechanism.

[0160] Specifically, as FIG. 27As shown, in this embodiment, the guide pivot member 350 includes a first pivot arm and a second pivot arm respectively extending from the pivot end 352, the end of the first pivot arm is the force-bearing end 353, the guide member 351 is arranged at the end of the second pivot arm, 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 shell 321. The first rotating arm and the second rotating arm form a lever with the pin shaft of the pivot end 352 as the fulcrum, and the wrench locking elastic element 355 and the guide member 351 are located at both ends of the lever. Such a structure is stable, and the wrench locking elastic element 355 is in a compressed state. The wrench locking elastic element 355 applies a thrust to the force-bearing end 353, so that the force-bearing end 353 and the guide member 351 tend to rotate clockwise. When the guide member 351 moves to the opening 342 in the main channel 341, it rotates clockwise and lifts upward to enter the slave channel 343, and moves to the locking point b of the slave channel 343 and stops. The first rotating arm and the second rotating arm can be as follows FIG. 27 The horizontally connected lever shown can also be an angled lever. The above is a specific embodiment of the guide pivot member 350 - a lever. The structure of the guide pivot member 350 is not limited thereto. For example, in other embodiments, a first rotating arm extends from the pivot end 352 of the guide pivot member 350, and the guide member 351 is arranged at the end of the first rotating arm. The middle point of the first rotating arm is the force-bearing end 353 connected to the wrench locking elastic element 355. This method can also achieve the wrench locking elastic element 355 applying force to the guide member 351 through the guide pivot member 350 to separate from the main channel 341 and enter the slave channel 343, all of which are within the scope of protection of the present invention.

[0161] In the above manner, the wrench locking elastic element 355 is indirectly connected to the guide 351 through the guide pivoting element 350. In other embodiments, the wrench locking elastic element 355 can be directly connected to the guide 351 to achieve the "wrench locking elastic element 355 drives the guide 351 to move out of the main channel 341 and into the secondary channel 343". In one embodiment, a "V" shaped rod can be used as the wrench locking elastic element 355, one end of the V rod is fixedly connected to the housing 321, and the other end is provided with the guide 351. The V shaped rod is made of rigid material, and the V shaped rod is slightly bent at the V shaped bend, thereby providing the guide 351 with a force to move out of the main channel 341 and into the secondary channel 343. However, such a rigid V shaped rod is prone to wear and breakage. In another embodiment, the wrench locking elastic element 355 is made of elastic material that can be deformed to a large extent, for example, a "V" shaped metal elastic sheet 522 or a spring, one end of which is fixedly connected to the housing 321, and the other end is provided with the guide 351. Since the locking elastic element has large elasticity, the stability of the guide 351 connected thereto in moving in the channel is poor, and the function of locking the wrench in the middle position cannot be well achieved. As can be seen from the above, in the present embodiment, the indirect connection between the wrench locking elastic element 355 and the guide 351 and the application of the above-mentioned force to move into the secondary channel 343 are achieved through the guide pivoting element 350, which has the following advantages in addition to the above-mentioned advantages: the parts are not prone to damage or breakage, the stability of the movement of the guide 351 is ensured, and the stability of the wrench locking mechanism is further ensured. Preferably, the wrench locking elastic element 355 in the present embodiment is a spring.

[0162] The guide pivoting element 350 further comprises a retreat preventing end 354 extending from the pivoting end 352. Before the wrench moves from the open position to the middle position, the retreat preventing end 354 is in a state of disengagement with the clip feeding driving mechanism. Before the wrench moves from the middle position to the closed position, the retreat preventing end 354 is in an abutting state with the clip feeding driving mechanism to prevent the retreat of the clip feeding driving mechanism.

[0163] Specifically, as shown in FIG. 6, the guide 351 is provided with a guide hole 3511, and the retreat preventing end 354 is provided with a retreat preventing pin 3541. The retreat preventing pin 3541 is inserted into the guide hole 3511 to prevent the retreat of the guide 351. FIG. 27As shown, in this embodiment, the guide pivot member 350 extends from a third rotating arm of the pivot end 352 , and the end of the third rotating arm is a stop end 354 , so that the guide member 351 , the stop end 354 and the force-bearing end 353 all move around the pivot end 352 . At the initial moment, when the clamping forceps are not in use, the wrench is in the open position, the guide pivot 350 is located below the clamp feeding drive mechanism, and the backstop 354 has no contact with the clamp feeding drive mechanism; when the wrench moves forward and the guide 351 moves toward the opening 342 in the main channel 341, the clamp feeding drive mechanism moves forward, and the backstop 354 still has no contact with the clamp feeding drive mechanism; when the guide 351 enters the slave channel 343 and moves toward the locking point b, the distance between the backstop 354 and the end of the clamp feeding drive mechanism gradually decreases until it abuts against the end, preventing it from retreating; when the guide 351 exits the slave channel 343 along the guide wall 345 and returns to the main channel 341, the jaw drive mechanism is clamping, and the backstop 354 always maintains abutment with the end of the clamp feeding drive mechanism to prevent it from retreating, thereby ensuring that the clamp located in the jaw assembly will never retreat during the clamping process, thereby ensuring the stability of the clamping. Specifically, as FIG. 25-26 As shown, the slave channel 343 extends from the opening 342 of the main channel 341 toward the direction away from the pivot end 334 of the wrench, and the distances from the starting point a and the end point to the pivot end 334 of the wrench are both smaller than the distance from the locking point b to the pivot end 334 of the wrench.

[0164] like FIG. 26 As shown, the guide member 351 has a first motion path when the wrench moves forward and a second motion path when the wrench returns to the closed position. The first motion path includes the main channel 341 and the slave channel 343, and the second path includes the main channel 341 and does not include the slave channel 343. The above motion path is the path of relative movement of the guide member 351. The motion path is the path formed by the channel reached during the movement. When the wrench reaches the closed position, the user releases the wrench, and the wrench returns to the open position under the action of the wrench reset mechanism. During this period, no stopping is required. The second motion path shields the slave channel 343, preventing the guide member 351 from entering the slave channel 343 and being locked by the locking point b during the reset movement. That is, the wrench locking mechanism, which plays an important role in the forward movement, is prevented from playing a reverse role in the reset movement, thereby achieving a one-step reset of the wrench.

[0165] Further, if FIG. 29-33DAs shown, to realize the above-mentioned shielding from the passage 343, the clip applier further comprises a path switching piece 360 for switching the first movement path and the second movement path. The path switching piece 360 is located in the housing 321, and the path switching piece 360 has two states. When the path switching piece 360 is in the first state, the path switching piece 360 leaves the from passage 343 to allow the guide piece 351 to enter or exit the from passage 343. When the path switching piece 360 is in the second state, the path switching piece 360 blocks the guide piece 351 from entering the from passage 343. The guide piece 351 is a column extending along a radial direction, passing through the guide passage 340. The guide piece 351 comprises a first part and a second part connected with each other. The first part of the guide piece 351 is accommodated in the guide passage 340, and the second part is outside the guide passage 340 and protrudes from the surface of the wrench body 331. When the first part of the guide piece 351 moves in the guide passage 340, the second part will form an active space corresponding to the movement of the first part. When the path switching piece 360 blocks the space through which the first part of the guide piece 351 enters the from passage 343 from the opening part 342, the guide piece 351 is prevented from entering the from passage 343, without the need to block the entire from passage 343. When the path switching piece 360 blocks the second part of the guide piece 351 from entering the active space or the way to the active space, the first part of the guide piece 351 is prevented from entering the from passage 343, that is, the guide piece 351 is also prevented from entering the from passage 343.

[0166] The guide piece 351 enters and exits the from passage 343 from the opening part 342 of the main passage 341. The opening part 342 comprises a starting point 342a and an ending point 342b, and the starting point 342a and the ending point 342b are the entrance and exit of the from passage 343. The starting point 342a is close to the starting point a of the main passage 341, and the ending point 342b is close to the ending point of the main passage 341. In an embodiment, when the wrench is moving forward and the guide piece 351 is located at the starting point 342a of the opening part 342 of the main passage 341, the path switching piece 360 is in the first state, and the guide piece 351 enters the from passage 343. During the movement of the guide piece 351 in the from passage 343 to the ending point 342b of the opening part 342, the path switching piece 360 is in the first state, so that the guide piece 351 can enter and exit the from passage 343 smoothly when the wrench is moving forward. After the wrench reaches the closed position and is reset, at least when the guide piece 351 is located at the ending point 342b of the opening part 342 of the main passage 341, the path switching piece 360 is in the second state and remains in the second state at least until the guide piece 351 moves to the starting point 342a of the opening part 342 of the main passage 341, so that the guide piece 351 cannot enter the from passage 343 during the reset movement. The state control logic of the path switching piece 360 as above needs to be designed based on the structure of the opening part 342 to ensure the formation of the first movement path and the second movement path.

[0167] In this embodiment, FIG. 31A-31D As shown, the path switching member 360 has the following state logic that is relatively easy to implement: during the period when the wrench is moving forward and moves from the open position to 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 is moving forward and reaches the closed position, the path switching member 360 switches from the first state to the second state. After the wrench reaches the closed position, it makes a reset movement and moves from the closed position to the intermediate position. During the reset movement from the closed position, the path switching member 360 is in the second state, so that the guide member 351 cannot enter the slave channel 343 at all times. The state control logic of the path switching member 360 of this embodiment controls the state of the path switching member 360 based on the position of the wrench, achieving the same function with greater stability and a simpler design.

[0168] Furthermore, when the wrench reaches the closed position and begins its return movement, the path switching member 360 is in the first state when it reaches the open position. Specifically, during the return movement of the wrench from the intermediate position to the open position, the path switching member 360 switches from the second state to the first state. Thus, at the end of each use cycle of the continuously applied clip applier, the path switching member 360 returns to its initial state, allowing for normal function in the next use cycle.

[0169] Therefore, during the forward movement of the wrench, at least when the guide member 351 passes through the opening 342, the path switching member 360 is in the first state; during the resetting movement of the wrench, at least when the guide member 351 passes through the opening 342, the path switching member 360 is in the second state.

[0170] Furthermore, to achieve state switching of the path switching member 360, the clamping forceps also includes a path driving member located within the housing 321. The path switching member 360 is disposed in one of the wrench and the main body 320, and the path driving member is disposed in the other of the wrench and the main body 320. Specifically, the path switching member 360 is disposed in one of the main housings 321 of the wrench and the main body 320, and the path driving member is disposed in the other of the main housings 321 of the wrench and the main body 320. During forward motion or reset motion of the wrench, when the path driving member abuts against the path switching member 360, the path switching member 360 is driven to move, thereby switching the path switching member 360 between the first state and the second state. The movement of the wrench drives the path driving member, which in turn drives the path switching member 360 to change its state, and finally returns to changing the motion path of the wrench's own guide channel 340. The movement of the wrench is the power source for the wrench's motion path switching, achieving an internal loop that is simple and reliable, without requiring an additional power source to change the motion path.

[0171] When the wrench is in forward motion or reset motion, the path driving member can be in contact with or separated from the path switching member 360. When separated, the path switching member 360 ideally does not move and remains in a fixed position, and the state remains unchanged. When in contact, the path switching member 360 moves and changes position, and the state can change. In another embodiment, the path switching member 360 can continuously move in contact with the path driving member, and when it moves to a certain position, the switching between the first state and the second state occurs.

[0172] Specifically, in the present embodiment, as shown in FIG. 29 The path switching member 360 includes a pivoting portion 361, a trigger portion, and an execution portion 363. The path switching member 360 rotates about the pivoting portion 361. The trigger portion includes a first trigger portion 362a and a second trigger portion 362b disposed on the two sides of the pivoting portion 361, respectively. The path driving member is a guide rib, which includes a first guide rib 371 and a second guide rib 373. The first guide rib 371 has a first guide slope 372, and the second guide rib 373 has a second guide slope 374. The first guide rib 371 is located in front of the first trigger portion 362a, and the second guide rib 373 is located behind the second trigger portion 362b. When the first trigger portion 362a abuts against the first guide rib 371 and moves along the first guide slope 372, the path switching member 360 rotates towards the first direction, and the path switching member 360 switches from the first state to the second state. When the second trigger portion 362b abuts against the second guide rib 373 and moves along the second guide slope 374, the path switching member 360 rotates towards 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 execution portion 363 allows the guide member 351 to enter or exit the through channel 343. When the path switching member 360 is in the second state, the execution portion 363 blocks the guide member 351 from entering the through channel 343.

[0173] During the forward motion of the wrench, the path switching member 360 moves relative to the path driving member. The front side and the back side refer to the relative movement direction of the path switching member 360 relative to the path driving member during the forward motion of the wrench.

[0174] As shown in FIG. 29As shown, in the present embodiment, the pivot portion 361 is a shaft fixed in a horizontal pin hole of the wrench main body, the first and second trigger portions 362a and 362b are two plates extending from the shaft, which are the first and second plates 362a' and 362b' respectively, and are at an obtuse angle, and the execution portion 363 is a rib connecting the first plate 362a'; the pivot portion 361 of the path switching member 360 is connected to the wrench, particularly the wrench main body 331 near the position of the through channel 343, the obtuse angle of the first and second plates 362a' and 362b' faces the inner side of the main housing 321, the guide rib is arranged on the inner side of the main housing 321, and the inclined surface 498 of the first and second guide inclined surfaces 372 and 374 faces the wrench main body 331. In other embodiments, the first and second plates 362a' and 362b' can be at an acute angle or a right angle.

[0175] The above arrangement of the path switching member 360 and the front and rear sides of the path driving member is such that the path switching member 360 selectively abuts or disengages from the path switching member 360 when the wrench is in a forward motion or a return motion. The positions of the wrench further include a first proximate position close to the closed position between the intermediate position and the closed position, and a second proximate position close to the open position between the open position and the intermediate position. Specifically, as shown in FIG. 6, when the wrench is in the first proximate position, the first and second plates 362a' and 362b' of the path switching member 360 abut the first and second guide inclined surfaces 372 and 374 of the path driving member 350, and the execution portion 363 of the path switching member 360 abuts the guide rib of the path driving member 350. FIG. 33A-33DThe movement process of the path switching piece 360 and the path driving piece is as follows: at the initial moment, the wrench is located at the open position, the pivoting part 361 of the path switching piece 360 is located at the first position, and is in the first state and in the disengaged state with the first guide rib 371; during the forward movement of the wrench and before the movement from the open position to the first adjacent position, the path switching piece 360 moves with the wrench around the pivoting end 334 of the wrench, the first trigger part 362a gradually approaches the first guide rib 371, the pivoting part 361 of the path switching piece 360 does not move in the first direction or the second direction, and is still located at the first position and in the first state; at the moment when the wrench reaches the first adjacent position, the path switching piece 360 starts to abut against the first guide slope 372 of the first guide rib 371, and the path switching piece 360 is still in the first position and in the first state; during the continuous forward movement of the wrench before the movement from the first adjacent position to the closed position, the first trigger part 362a of the path switching piece 360 moves along the first guide slope 372, the path switching piece 360 quickly rotates towards the first direction, and is disengaged from the first position but is still in the first state; at the moment when the wrench reaches the closed position, the path switching piece 360 rotates a total of A degrees in the first direction from the first position, the pivoting part 361 of the path switching piece 360 is located at the second position, and the path switching piece 360 switches 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 piece 360 moves with the wrench around the pivoting end 334 of the wrench, the second trigger part 362b gradually approaches the second guide rib 373, and is also in the disengaged state with the first guide rib 371, the pivoting part 361 of the path switching piece 360 does not move in the first direction or the second direction, and remains in the second position and in the second state; at the moment when the wrench reaches the second adjacent position, the path switching piece 360 starts to abut against the second guide slope 374 of the second guide rib 373, and the path switching piece 360 is still in the second position and in the second state; during the continuous reset movement of the wrench before the movement from the second adjacent position to the open position, the second trigger part 362b of the path switching piece 360 moves along the second guide slope 374, the path switching piece 360 quickly rotates towards the second direction, is disengaged from the second position but is still in the second state; at the moment when the wrench reaches the open position, the path switching piece 360 rotates a total of A degrees in the second direction from the second position, the path switching piece 360 returns to the first position, and the path switching piece 360 switches from the second state to the first state. The lengths of the first guide rib 371 and the second guide rib 373 are short, the A-degree rotation is relatively fast, the switching between the first state and the second state is relatively fast, the structure is simple, the cost is low, and when the path switching piece 360 is in the disengaged state with the path driving piece, the path switching piece 360 has a stable position and a stable state, and the state of the clip applier is more stable.

[0176] In other embodiments, different from the present embodiment, the position of the handle further comprises a third adjacent position and a fourth adjacent position between the open position and the intermediate position, the fourth adjacent position is closer to the open position, the second trigger portion 362b is in disengaged state with the second guide rib 373 before the handle reaches the third adjacent position, the position, movement and state of the path switching piece 360 are not repeated here, during the movement of the handle from the third adjacent position to the fourth adjacent position, the second trigger portion 362b abuts against the second guide rib 373 and rotates in the second direction along the second guide slope 374, when in the fourth adjacent position, the path switching piece 360 returns to the first position and the first state, which are the same as described above; and during the subsequent movement of the handle from the fourth adjacent position to the open position, the second guide rib 373 is in disengaged state with the path switching piece 360, and the path switching piece 360 remains in the first position and the second state. In this way, the path switching piece 360 can also return to the initial state so as to normally function in the next use cycle of the clip applier.

[0177] In the present embodiment, the clip applier further comprises a positioning mechanism, such as FIG. 32 As described above, the positioning mechanism comprises a first positioning piece 381 and a second positioning piece 382, the first positioning piece 381 is arranged on the pivot portion 361 of the path switching piece 360, and moves synchronously with the pivot portion 361 when the path switching piece 360 moves in the first direction or the second direction, the second positioning piece 382 comprises a first recess 383, a second recess 384 and a protruding portion 385 arranged between the first recess 383 and the second recess 384, one of the first positioning piece 381 and the protruding portion 385 is an elastic element, the path switching piece 360 is in the first state when the first positioning piece 381 is in the first recess 383; and the path switching piece 360 is in the second state when the second positioning piece 382 is in the second recess 384. With such a positioning mechanism, the first positioning piece 381 can only be fixed in the first recess 383 or the second recess 384, and cannot be located in other positions, so that the path switching piece 360 can only be positioned in the two fixed positions relative to the pivot portion 361 of the path switching piece 360, such as the first position and the second position described above, and the path switching piece 360 is in the first state when in the first position, and the path switching piece 360 is in the second state when in the second position.

[0178] 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 to the first direction, the first positioning member 381 also rotates to the first direction and abuts against the protruding part 385. Since the first positioning member 381 is an elastic element, it can be compressed. The first positioning member 381 can smoothly pass the protruding part 385 and enter the second recess 384. If the user stops operating the wrench when the first positioning member 381 is passing the protruding part 385, the first positioning member 381 can return to the first recess 383 under the reaction force of the elastic element. Similarly, the first positioning member 381 can smoothly pass the protruding part 385 and enter the first recess 383 from the second recess 384. Details are not described herein.

[0179] According to the above description, the path switching member 360 and the path driving member can be in a disengaged state. If there is no positioning mechanism, the pivoting part 361 of the path switching member 360 can move freely. When the forceps are shaken or shaken, the path driving member will rotate freely to the first direction or the second direction, so as to accidentally enter the second state during the period when the first state is required, and accidentally enter the first state during the period when the second state is required. The first movement path of the forward movement of the forceps and the second movement path of the reset movement are destroyed, and the forceps cannot be normally used. Therefore, the positioning mechanism prevents the path switching member 360 from moving accidentally, and ensures the normal movement path of the forceps.

[0180] The first positioning member 381 can be a first protruding rib protruding from the pivoting part 361 in the direction opposite to the obtuse angle. The protruding part 385 is a second protruding rib. In other embodiments, the elastic element can also be a C-shaped protruding metal rod having elasticity.

[0181] In the embodiment, the jaw assembly has a design capable of stably guiding, clamping and compressing the first clip. Details are as follows.

[0182] The jaw assembly includes a first jaw arm 1 and a second jaw arm 1'. The first jaw arm 1 has the same structure as the second jaw arm 1'. The structure of the first jaw arm 1 is described in detail. FIG. 34As shown, the first jaw arm 1 comprises a bottom 11, a first side 12 and a second side 13, the bottom 11, the first side 12 and the second side 13 make the cross section of the first jaw arm 1 generally U-shaped. The first side 12 comprises a first guide portion 15 and a first accommodating portion 17, both of which are arranged on the inner wall of the first side 12, and the second side 13 comprises a second guide portion and a second accommodating portion 18, both of which are arranged on the inner wall of the second side 13. The bottom 11 is located between the first guide portion 15 and the second guide portion, and the first accommodating portion 17 and the second accommodating portion 18 form a gap 14 therebetween. The first guide portion 15 and the second guide portion have the same structure, and the first accommodating portion 17 and the second accommodating portion 18 have the same structure, and the present application focuses on describing the structure of the first guide portion 12 and the first accommodating portion 17. The first guide portion 15 comprises a guide surface 51, at least a second part 53 of the guide surface 51 is generally arc-shaped. The guide surface 51 comprises a first part 52 flush with the upper surface of the bottom 11, and a second part 53 higher than the upper surface of the bottom 11, the second part 53 is formed by the first part 52 extending in a generally arc-shaped direction, and the first part 52 and the second part 53 are smoothly transitioned. The first accommodating portion 17 is located away from the first guide portion 15, and the first accommodating portion 17 is recessed. The first accommodating portion 17 comprises a proximal side 71 and a distal side 72, the proximal side 71 intersects with the second part 53 of the guide surface 51, and the intersection 73 is rounded. The intersection 73 is the distal end of the second part.

[0183] The jaw assembly further comprises a stopper 2. There are four stoppers 2 in total, which are arranged on the first jaw arm 1 and the second jaw arm 1', and cooperate with the first guide portion 15 and the second guide portion of the first jaw arm 1 and the two guide portions of the second jaw arm 1' respectively. The four stoppers 2 have the same structure, and the structure of the first stopper 21 cooperating with the first guide portion 15 is taken as an example to illustrate the structure of the four stoppers 2. As shown in the figure, FIG. 34-38As shown, the first stopper 21 is located above the first guide portion 15, and the first stopper 21 comprises a base 23 and a movable portion, the movable portion comprises an end portion 22 and an intermediate portion 25, and the intermediate portion 25 is located between the end portion 22 and the base 23. The size of the base 23 is larger than that of the intermediate portion 25 and the end portion 22, and the base 23 is clamped in the groove provided on the first side portion 12, so that the base 23 is fixed to the first side portion 12. The intermediate portion 25 and the end portion 22 are both located inside the inner wall of the first side portion 12. The movable portion 23 can move in the up-down direction. Thus, the first guide portion 15 and the first stopper 21 jointly form the guide space of the clamp. Similarly, the first jaw 1 and the second jaw 1' also have three guide spaces. The first jaw 1 and the second jaw 1' have four guide spaces, which correspond to the four protruding portions of the clamp one by one. In the initial state, the first stopper 21 does not cooperate with the protruding portions of the clamp, and the distance between the second portion 53 of the guide surface 51 and the first stopper 21 decreases in the direction towards the distal end of the guide surface 51. The above distance reaches the minimum between the first stopper 21 and the intersection 73. The above distance can be determined in the following manner, for example, the minimum distance between a certain point on the second portion 53 and the lower surface of the first stopper 21 decreases in the direction towards the distal end of the guide surface 51.

[0184] The stopper 2 has elasticity, including the following two ways. In one way shown in the embodiment, the material of the stopper 2 has elasticity, including but not limited to metal, so that the stopper 2 has a tendency to keep its original position. In another way shown in other embodiments, at least a part of the stopper 2 is connected to the jaw, and the jaw is also provided with a torsion spring, one end of the torsion spring is connected to the jaw, and the other end is connected to the stopper 2, so that the stopper 2 has a tendency to approach the guide surface. The stopper 2 has elasticity, so that the protruding portions of the clamp are constrained in the guide space by the stopper 2, thereby making the clamp keep in the guide space during the movement towards the far end, and further making the clamp gradually open. On the basis of the elasticity of the stopper 2, the stopper 2 comprises a base and a movable portion, and the movable portion can move up and down, including the following two ways: in one way shown in the embodiment, the base is connected to the jaw, and the movable portion can move up and down due to the elasticity of the material of the stopper 2; in another way shown in other embodiments, the base is pivotally connected to the jaw, and the movable portion can also pivotally move up and down, one end of the torsion spring is connected to the jaw, and the other end is connected to the movable portion, so that the movable portion has a tendency to move towards the guide surface. The movable portion can move up and down, and can give space to the protruding portions to smoothly leave the guide space and enter the accommodation portion.

[0185] The maximum dimension of the first protrusion 41 is substantially the same as the maximum dimension of the second protrusion 42. The shape of the first protrusion 41 and the shape of the second protrusion 42 can be the same or different. Thus, the first protrusion 41 and the second protrusion 42 can fit into substantially the same guide space. It should be noted that the dimensions of the first protrusion 41 and the second protrusion 42 can also be set to be different, or even the dimensions of the two first protrusions 41 and the two second protrusions 42 can be set to be different. In this case, the guide space in which the protrusions cooperate can be appropriately modified, that is, the relative position, shape, and / or size of the guide portion and the stopper 2 can be appropriately modified.

[0186] In the open state of the jaw assembly, i.e. the fully open state, under the drive of the feeding drive mechanism, the clip is pushed to move far away from the clip box 220 into the jaw assembly, and the first protruding part and the second protruding part of the clip enter the corresponding guide space respectively and move far away in the corresponding guide space until the clip is located at the distal end of the jaw assembly, and at least a part of the first protruding part and at least a part of the second protruding part enter and are accommodated in the accommodation part respectively. The first protruding part and the second protruding part are guided by the guide part, thereby moving along the guide surface under the constraint of the stopper 2, so that the clip moves in the desired direction. Before feeding into the jaw assembly, the clip is partially compressed and stored in the clip box 220 due to the size and internal space of the clip box 220, and at this time the clip is in an incomplete open state. A period of compression makes the clip need external force to restore its original shape, i.e. the open shape of the clip, after being separated from the sleeve 210. Compression means that the two clip arms of the clip are close to each other but not engaged. Since the clip is assembled into the clip box 220 and then used for a period of time, the compression for this period of time makes the clip have a tendency to maintain the shape after compression. The first protruding part and the second protruding part are also constrained by the stopper 2, so that they overcome the above-mentioned tendency to maintain the shape after compression during the movement far away in the guide space, so that the first clip arm and the second clip arm of the clip gradually open during the movement far away, until they restore their original shape or keep consistent with the open angle of the jaw assembly. The clip restores its original shape or keeps consistent with the open angle of the jaw assembly, so that the clamping space between the two clip arms of the clip is maximized, facilitating the accommodation of the to-be-clamped tissue therein. In the initial state, the protruding part of the clip does not enter the guide space and is not constrained by the stopper 2, at this time the distance between the second part of the guide surface and the corresponding stopper 2 decreases in the direction towards the distal end of the guide surface, until the distance between the distal end of the second part (i.e. the distal end of the guide surface) and the stopper 2 reaches the minimum. Since the above-mentioned distance decreases in the direction towards the distal end of the guide surface, the first protruding part and the second protruding part of the clip gradually approach the outlet (i.e. the intersection) of the guide space and the entrance of the accommodation part during the movement towards the distal end of the guide surface, so that the first protruding part and the second protruding part can smoothly enter the accommodation part. The above-mentioned distance decreases in the direction towards the distal end of the guide surface, for example, by making at least the second part of the guide surface substantially arc-shaped. During the movement of the first protruding part and the second protruding part far away in the guide space, the constraint force they receive becomes larger and larger, so that the protruding part of the clip is guided by the second part of the guide surface while being more constrained by the stopper 2, which inhibits the movement speed of the protruding part of the clip and prevents the protruding part from passing through the entrance of the accommodation part after leaving the guide space due to excessive speed and thus failing to enter the accommodation part.Further, after the first protrusion and the second protrusion reach and pass the intersection (i.e. the intersection formed by the proximal face of the accommodation portion and the second portion of the guide face), they will not continue to move in the original direction and thus not enter the accommodation portion under the constraint of the stopper 2. After the first protrusion and the second protrusion pass the intersection and enter the accommodation portion, the clip is moved into position and is in the above-mentioned preparation position, completing the clip feeding. Since the movable portion of the stopper 2 can move up and down, in the case that the distance between the second portion of the guide face and the corresponding stopper 2 decreases in the direction towards the distal end of the guide face, while the stopper 2 is constraining the protrusions of the clip, the movable portion of the stopper 2 can give space to the protrusions of the clip by moving, so that the protrusions of the clip can leave the guide space and enter the accommodation portion under the constraint. The constraint of the stopper 2 to the protrusions can be realized by, for example, the stopper 2 abutting against the protrusions. At least a portion of the first protrusion and at least a portion of the second protrusion are accommodated in the accommodation portion, respectively, so that the clip maintains a stable position during the jaw closing, i.e. during the clipping. Further, the accommodation portion is recessed, which helps the first protrusion and the second protrusion of the clip to continuously remain in the accommodation portion and not to easily fall off. Further, the first protrusion and the second protrusion accommodated in the accommodation portion are subjected to the force applied by the stopper 2 abutting against them, so that the first protrusion and the second protrusion are more stably maintained in the accommodation portion. The above-mentioned force can be, for example, a force generally downward and upward, or a force generally towards the distal end, which is related to the position of the stopper 2 abutting against the protrusions. The stable position of the first protrusion and the second protrusion makes the clip maintain a stable position during the jaw closing, ensuring the clamping effect. It should be noted that the present application also includes a clip feeding and preventing mechanism for preventing the clip feeding driving mechanism from retreating, and thus preventing the clip from retreating. The accommodation portion and the stopper 2 function to make the clip maintain a stable position at the distal end of the jaw assembly, so as to facilitate the clipping.

[0187] Subsequently, the jaw assembly enters a closing process, with the first and second arms approaching each other until they reach the end of their travel, at which point the jaw assembly completes closing. During the closing process of the jaw assembly, if the first protrusion and / or the second protrusion is not accommodated in the accommodating portion, the jaw arm will be unable to apply force to at least one of the protrusions through the accommodating portion, causing the clamp to twist or move out of the correct position, resulting in the two clamp arms being unable to engage, thereby causing clamping failure. At least a portion of the first protrusion and at least a portion of the second protrusion are both accommodated in the accommodating portion. Thus, during the closing process of the jaw assembly, the first arm drives the first clamp arm, and the second arm drives the second clamp arm to rotate about the connecting portion, thereby bringing the first and second clamp arms closer to each other. Ultimately, the first engaging portion of the first clamp arm engages the second engaging portion of the second clamp arm, securing the first and second clamp arms to each other. During the closing process of the jaw assembly, the clamps maintain a stable position, preventing undesirable movement or twisting of the clamps, which could result in engagement failure and clamping failure. After the protrusion is accommodated in the accommodating portion, further, the two first protrusions are both abutted by the stopper 2, and the two second protrusions are also both abutted by the stopper 2, further ensuring that the protrusion is accommodated in the accommodating portion and will not fall off from the accommodating portion.

[0188] In another embodiment, the structure of the first clamp arm is different from the structure of the second clamp arm. The structure of the first clamp arm is the same as that of the previous embodiment. The difference in structure between the second clamp arm and the first clamp arm is that the first part of the guide surface of the first guide portion of the second clamp arm includes a stroke extension structure, and the first part of the guide surface of the second guide portion of the second clamp arm also includes a stroke extension structure. Preferably, the stroke extension structure is a pit. The stroke extension structure lengthens the stroke of the first clamp arm of the clamp, and in the same time, the distance the second clamp arm moves toward the distance is greater than the distance the first clamp arm moves toward the distance, thereby allowing the clamp to move along the distance during the movement. FIG. 39 The counterclockwise rotation of the clamp causes the first and second protrusions of the clamp to be located on the same vertical line, thereby changing the state in which the first and second protrusions are not on the same vertical line when compressed. This avoids the clamp from moving unsmoothly due to uneven force during movement, and also avoids the impact caused by the first protrusion of the first clamp arm entering the accommodating portion first. It should be noted that when the asymmetric clamp is compressed in the clamp box 220, due to the different curvatures of the two clamp arms, the first protrusion of the first clamp arm is located farther than the second protrusion of the second clamp arm. In this embodiment, the first portion of the guide surface of the first guide portion and the second guide portion of the second clamp arm, excluding the stroke extension structure, can be flush with the upper surface of the bottom.

[0189] The clip applier further comprises a first elastic element 60. FIG. 41-42As shown, the first jaw arm and the second jaw arm each comprises a receiving slot, which is a through slot, for receiving the clip feed drive mechanism, particularly the clip feed block 231 and part of the resilient push rod 232 of the clip feed drive mechanism, when the jaw assembly is closed, to avoid interference between the first jaw arm and the second jaw arm and the clip feed drive mechanism when the jaw assembly is closed. The proximal end of the first jaw arm has a protrusion, the cartridge 220 has a hole 404, the protrusion is received in the hole 404, so that the proximal end of the first jaw arm is pivotally connected to the distal end of the cartridge 220, the proximal end of the second jaw arm is pivotally connected to the distal end of the cartridge 220, one end of the first resilient element 60 is connected to the proximal end of the first jaw arm, and the other end of the first resilient element 60 is connected to the proximal end of the second jaw arm. The elastic force of the first resilient element 60 causes the proximal end of the first jaw arm and the proximal end of the second jaw arm to move away from each other, and thus the first jaw arm and the second jaw arm are kept in an open state (the jaw assembly is opened to the bottom state). The proximal end of the first jaw arm and the proximal end of the second jaw arm are both located in the sleeve 210, as shown in the figure. FIG. 42 As shown, the distal end of the sleeve 210 cooperates with the lower surface of the first jaw arm and the upper surface of the second jaw arm. The sleeve 210 is driven to move by the jaw drive mechanism, and the distal end of the sleeve 210 also moves. As the distal end of the sleeve 210 moves away, the distal end of the sleeve 210 cooperates with the lower surface of the first jaw arm and the upper surface of the second jaw arm, and drives the first jaw arm and the second jaw arm to pivot so that they move closer to each other, achieving the closure of the jaw assembly. After the jaw assembly is closed, the first resilient element 60 is compressed to store energy. As the sleeve 210 moves towards the proximal end, the distal end of the sleeve 210 moves towards the proximal end, and the energy stored after the compression of the first resilient element 60 is released, the elastic force of the first resilient element 60 causes the proximal end of the first jaw arm and the proximal end of the second jaw arm to move away from each other, and thus the first jaw arm and the second jaw arm are opened. The first resilient element 60 is used to open the jaw assembly, avoiding the use of complex mechanisms to achieve the above function. Preferably, the first resilient element 60 is a U-shaped spring, which is compressed to store energy by moving the two arms of the U-shaped spring closer to each other. The U-shaped spring occupies less space, and its elastic force is greater than that of ordinary springs. The meaning of the above opening is the same as that of the opening.

[0190] It should be noted that the distal direction can be a direction generally away from the distal direction, including the longitudinal direction, and also including a direction at an angle to the longitudinal direction.

[0191] In combination FIG. 43 to FIG. 45 The second embodiment of the present application is the same as the first embodiment, and the second embodiment relates to a clip applier.

[0192] The difference between the present embodiment and the first embodiment is that the driving member selectively drives the feeding clamp driving mechanism or the pushing clamp driving mechanism under the action of the actuating member 330; in the first state, the driving member is separated from the pushing clamp driving mechanism and combined with the feeding clamp driving mechanism to drive the feeding clamp driving mechanism to move; in the third state, the driving member is separated from the feeding clamp driving mechanism and combined with the pushing clamp driving mechanism to drive the pushing clamp driving mechanism to move. In the present embodiment, when the driving member drives the feeding clamp driving mechanism to move, the pushing clamp driving mechanism does not retreat to store energy, but remains stationary at the initial position without any movement; in this way, the feeding clamp action and the pushing clamp action can also be effectively ensured to be unsynchronized and not to interfere with each other. Compared with the first embodiment, while the safety and reliability of the clamping pliers can be effectively ensured, the overall structure of the clamping pliers is simpler.

[0193] The jaw driving mechanism is sleeved on the feeding clamp driving mechanism and the pushing clamp driving mechanism and is used for driving the jaw assembly to close; in the above-mentioned third state, the driving member is combined with the jaw driving mechanism and the pushing clamp driving mechanism at the same time to drive the jaw driving mechanism and the pushing clamp driving mechanism to move synchronously. In the present embodiment, since the jaw driving mechanism and the pushing clamp driving mechanism move synchronously, compared with the first embodiment, the transmission mechanism has no second state. The feeding clamp driving mechanism comprises a feeding clamp driving tube 402, a feeding clamp assembly connected with the feeding clamp driving tube 402, and the feeding clamp driving tube 402 drives the feeding clamp assembly to move to drive the clamp into the jaw assembly, and the specific structure is the same as mentioned above; the jaw driving mechanism comprises a jaw driving tube 432 and a sleeve 210 connected with the jaw driving tube 432, and the specific structure is the same as mentioned above; the pushing clamp driving mechanism comprises a pushing clamp driving tube 459 and a pushing clamp driving member connected with the pushing clamp driving tube 459, and the pushing clamp driving member is spaced apart in the longitudinal direction and has a plurality of side cavities 252, and one pushing clamp block 253 is installed in each side cavity 252, and the pushing clamp driving member drives the pushing clamp block 253 to move, and in the present embodiment, the pushing clamp driving member is a pushing clamp rod 251, and the specific structure of the pushing clamp rod 251 is the same as mentioned above. The structure of the driving member is the same as the structure of the switching mechanism mentioned above or below, which will not be described here. In order to make the overall structure more compact, the pushing clamp driving tube 459 is sleeved on the feeding clamp driving tube 402, the pushing clamp driving tube 459 is coaxial with the feeding clamp driving tube 402, the feeding clamp assembly and the pushing clamp driving member are located on both sides of the clip box 220, specifically, the feeding clamp assembly is located on the outside of the clip box 220, and the pushing clamp driving member is located on the inside of the clip box 220. In order to realize the combination of the driving member with the jaw driving mechanism and the pushing clamp driving mechanism at the same time, the proximal end of the pushing clamp driving tube 459 is flush with the proximal end of the jaw driving tube 432, and the distal end face 508 of the driving member is combined with the proximal end faces of the two to push them to move synchronously, of course, it can be understood that the proximal end of the pushing clamp driving tube 459 can also not be flush with the proximal end of the jaw driving tube 432, at this time, as long as the distance from the distal end face 508 of the driving member abutting against the pushing clamp driving tube 459 to the pushing clamp driving tube 459 is equal to the distance from the distal end face 508 of the driving member abutting against the jaw driving tube 432 to the jaw driving tube 432.

[0194] Of course, in another embodiment, in the third state, the driving member first drives the pusher driving mechanism to move to combine with the jaw driving mechanism, and then drives the jaw driving mechanism and the pusher driving mechanism to move synchronously. The jaw driving mechanism is sleeved on the pusher driving mechanism and the pusher driving tube 459. In the initial state, the distance from the proximal end of the pusher driving tube 459 to the distal end of the driving member is less than the distance from the proximal end of the jaw driving tube 432 to the distal end of the driving member. Thus, during the movement of the driving member, the driving member first combines with the pusher driving tube 459 to drive the pusher driving tube 459 to move to combine with the jaw driving tube, and then drives the jaw driving tube 432 and the pusher driving tube 459 to move together. Similarly, in order to make the overall structure more compact, the pusher driving tube 459 is sleeved on the pusher driving tube 402.

[0195] The jaw driving mechanism further comprises a second reset member 446, such as an elastic element. The elastic element is sleeved on the outer surface of the jaw driving tube 432, one end of the elastic element abuts against the baffle 434 on the outer surface of the jaw driving tube 432, and the other end of the elastic element extends forward to abut against the inner wall of the housing 321 of the clip applier. The elastic element is used to store energy when the jaw driving mechanism moves forward, and the elastic element releases the energy by restoring the deformation to provide power for the reset of the jaw driving mechanism. The pusher driving mechanism further comprises a third reset member 456, such as an elastic element. One end of the elastic element abuts against the inner wall of the housing 321 of the clip applier, and the other end of the elastic element extends backward to abut against the distal end face 508 of the pusher driving tube 459. The elastic element is used to store energy when the pusher driving mechanism moves forward, and the elastic element releases the energy by restoring the deformation to provide power for the reset of the pusher driving mechanism. The pusher driving mechanism further comprises a first reset member 418, such as an elastic element. One end of the elastic element abuts against the protrusion 436 on the inner wall of the pusher driving tube 459, and the other end of the elastic element extends backward to abut against the distal end face of the pusher driving tube 402. The elastic element is used to store energy when the pusher driving mechanism moves forward, and the elastic element releases the energy by restoring the deformation to provide power for the reset of the pusher driving mechanism.

[0196] The working process of the clip applier to push the clip will be described in detail below with reference to the example that the driving member combines with the jaw driving mechanism and the pusher driving mechanism at the same time in the third state to drive the jaw driving mechanism and the pusher driving mechanism to move synchronously.

[0197] When the operator presses the actuating member 330, the actuating member 330 is moved from the open position to the intermediate position, the driving member drives the clip feeding driving mechanism to advance under the action of the actuating member 330, and 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 and the push clip driving tube 459. When the actuating member 330 moves to the intermediate position, the guide of the driving member runs onto the second guide surface 496 in the housing 321, the clamping block 482 is disengaged from the clamping groove of the clip feeding driving tube 402, the driving member is separated from the clip feeding driving mechanism, the advancing movement of the clip feeding driving mechanism is completed, the clip at the farthest end of the clip box 220 is fed into the jaw assembly (the clip feeding action is completed), and the distal end face 508 of the driving member abuts against the proximal end face 502 of the jaw driving tube 432 and the proximal end face 502 of the push clip driving tube 459. The stop end 354 of the clip feeding stop mechanism can abut against the clip feeding driving tube 402 after the switching mechanism is separated from the clip feeding driving mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip feeding driving mechanism. The actuating member 330 is continuously pressed, the actuating member 330 is moved from the intermediate position to the closed position, and the clip feeding stop mechanism gradually disengages from the clip feeding driving tube 402. The driving member drives the jaw driving mechanism and the push clip driving mechanism to advance 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 push clip driving mechanism advances to move the remaining clips in the clip box 220 to the next position, the actuating member 330 moves to the closed position, the jaw assembly is closed (the jaw closing action is completed), and the remaining clips in the clip box 220 are all moved to the next position (the push clip action is completed), the clip feeding stop mechanism is completely disengaged from the clip feeding driving tube 402, and the clip feeding driving tube 402 is reset under the action of the first reset member 418. The actuating member 330 is released, the jaw driving mechanism is reset under the action of the second reset member 446, and the push clip driving mechanism is reset under the action of the third reset member 456. That is, in the working process, the switching mechanism is first separated from the jaw driving mechanism and the push clip driving mechanism and combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move, and then separated from the clip feeding driving mechanism and combined with the jaw driving mechanism and the push clip driving mechanism to drive the jaw driving mechanism and the push clip driving mechanism to move synchronously.

[0198] The related working process that the clip applier is driven by one actuating member 330 to drive three driving mechanisms in the application will be described below.

[0199] The switching mechanism is connected with the clip feeding driving mechanism, the jaw driving mechanism and the push clip driving mechanism respectively, abuts against the actuating member 330 and is used for receiving power, drives the clip feeding driving mechanism to perform the clip feeding action, drives the jaw driving mechanism to perform the jaw closing action and drives the push clip driving mechanism to perform the push clip action in a preset sequence under the action of the actuating member 330, and the number of the actuating member 330 is one.

[0200] The advantage of such design is that the doctor operates one actuating member 330, which acts on the switching mechanism, and then acts on the three different driving mechanisms, i.e. the clip feeding driving mechanism, the jaw driving mechanism and the clip pushing driving mechanism, so that the three different driving mechanisms can complete the corresponding actions in the preset order. That is, the doctor can complete the clip feeding action, the jaw closing action and the clip pushing action by operating one actuating member 330, and the three actions meet the preset order and do not interfere with each other, which ensures the safety and smoothness of the doctor's operation and is simple to operate and user-friendly.

[0201] According to the working mode of the clip applier, the jaw closing action, the clip feeding action and the clip pushing action cannot be performed simultaneously, and in the present embodiment, the preset order followed by the three actions is that the clip feeding action is performed earlier than the jaw closing action and the clip pushing action. That is, the clip feeding action is performed first, and the jaw closing action and the clip pushing action are performed later. The sequence relationship of the three actions can be that the clip feeding action is performed first, the jaw closing action is performed later, and the clip pushing action is performed again, as in the first embodiment; or the clip feeding action is performed first, the jaw closing action and the clip pushing action are performed later, as in the second embodiment, wherein the jaw closing action and the clip pushing action can be performed simultaneously or the clip pushing action is performed first and then the jaw closing action and the clip pushing action are performed simultaneously. Specifically, as described in the first embodiment, the clip pushing driving mechanism is connected with the switching mechanism through the matching mechanism, and the movement direction of the clip pushing driving mechanism is opposite to that of the switching mechanism. When the actuating member 330 is pressed, the switching mechanism first separates from the jaw driving mechanism under the action of the actuating member 330, and then combines with the clip feeding driving mechanism to drive the clip feeding driving mechanism to move forward to perform the clip feeding action. Then, the switching mechanism separates from the clip feeding driving mechanism and combines with the jaw driving mechanism to drive the jaw driving mechanism to move forward to perform the jaw closing action. When the switching mechanism drives the clip feeding driving mechanism and the jaw driving mechanism to move forward, the matching mechanism is simultaneously driven to move to drive the clip pushing driving mechanism to retreat and store energy. The clip pushing driving mechanism includes a third return member 456 for storing the energy. When the actuating member 330 is released, the clip pushing driving mechanism moves forward under the action of the third return member 456 to perform the clip pushing action. The structure, positional relationship, connection relationship and movement relationship of the switching mechanism, the clip feeding driving mechanism, the jaw driving mechanism and the clip pushing driving mechanism are the same as those of the first embodiment, and will not be described here.

[0202] As can be known from the above description of the second embodiment, under the action of the actuating member 330, the switching mechanism is first separated from the jaw driving mechanism and the pusher 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 pusher driving mechanism to drive the jaw driving mechanism and the pusher driving mechanism to move synchronously; or the switching mechanism is first separated from the jaw driving mechanism and the pusher 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 combined with the pusher driving mechanism to drive the pusher driving mechanism to move to be combined with the jaw driving mechanism, and then the jaw driving mechanism and the pusher driving mechanism move synchronously. The structure, positional relationship, connection relationship and movement relationship of the switching mechanism, the clip feeding driving mechanism, the jaw driving mechanism and the pusher driving mechanism are the same as those of the third embodiment, and will not be described herein again.

[0203] In addition, the structure of the actuating member 330 is the same as described above, and will not be described herein again.

[0204] In combination with FIG. 46 to FIG. 50 For the third embodiment of the present application, the same as the above-described embodiments, the present embodiment relates to a clip applier.

[0205] The difference between the present embodiment and the foregoing embodiments is that the structure of the first clutch mechanism of the switching mechanism is different. In the present embodiment, the height difference between different portions of the guide rail forces the first clutch member to flip over to engage different driving mechanisms to achieve switching between different clip feeding actions and jaw closing actions. The first clutch member comprises a pivot block 514, and the clutch switching mechanism is the same as described above. The proximal end of the clip feeding driving mechanism is provided with a first groove 524, and the pivot block 514 cooperates with the first groove 524 to enable the first clutch member to be combined with the clip feeding driving mechanism. The second clutch member is the distal end face 508 of the switching mechanism body 500. The pivot block 514 is pivotably arranged on the switching mechanism body 500. The pivot block 514 comprises a block-shaped body 516, a first clamping notch 518 at the lower end of the block-shaped body 516, and a first pivot shaft 520 at the rear end of the block-shaped body 516. The pivot block 514 is pivotally connected to the switching mechanism body 500 through the first pivot shaft 520. The upper end of the pivot block 514 is provided with a hole 404 for mounting a guide column 490. The pivot block 514 is slidably fitted with the guide rail in the housing 321 through the guide column 490. The first clutch member further comprises a spring 522 arranged above the first guide face 494. The spring 522 provides a downward force to the guide column 490, so that the first clutch member can be better combined with the clip feeding driving mechanism. In the initial state, the first clamping notch 518 of the pivot block 514 remains engaged with the first groove 524 of the clip feeding driving mechanism. The actuating member 330 drives the switching mechanism to advance, and the pivot block 514 advances with the switching mechanism and drives the clip feeding driving mechanism to move distally to perform a clip feeding action. When the guide column 490 moves along the inclined face 498 to the second guide face 496, the pivot block 514 flips upward around the first pivot shaft 520 to lift the first clamping notch 518, so that it is disengaged from the first groove 524, i.e., separated from the clip feeding driving tube 402. At this time, the distal end face 508 of the switching mechanism body 500 is combined with the proximal end of the jaw driving mechanism, thereby driving the jaw driving mechanism to move to perform a jaw closing action. Of course, it is easily conceivable that the angle of the pivot block 514 can be adjusted so that when the first clamping notch 518 of the pivot block 514 is separated from the first groove 524 on the clip feeding driving tube 402, the first clamping notch 518 is combined with the proximal end of the jaw driving mechanism, thereby driving the jaw driving mechanism to move.

[0206] In combination FIG. 51 to FIG. 54 The present application is a fourth embodiment, which is the same as the foregoing embodiments. The present embodiment relates to a clip applier.

[0207] The difference between the present embodiment and the foregoing embodiments is that the structure of the switching mechanism is different. In the present embodiment, the switching mechanism does not include a moving member and a movement guide, and the switching mechanism includes a rotating arm 526 pivotably arranged on the switching mechanism body 500, wherein the rotating arm 526 includes a rotating arm body 528, a second clamping recess 530 at the lower end of the rotating arm body 528, and a second rotating shaft at the rear end of the block-shaped body 516, the rotating arm 526 being pivotally connected with the switching mechanism body 500 through the second rotating shaft, and the switching mechanism body 500 being sleeved on the clip feeding driving mechanism. In the initial state, the second clamping recess 530 of the rotating arm 526 is engaged with the second groove 534 of the clip feeding driving mechanism; the actuating member 330 drives the switching mechanism to advance to drive the clip feeding driving mechanism to move to the distal end to perform the clip feeding action; when the rotating arm 526 moves to the proximal end of the jaw driving mechanism, the switching mechanism is continuously driven, the inclined surface 498 of the rotating arm 526 is flipped upward under the guidance of the guide surface at the proximal end of the jaw driving mechanism, so that the second clamping recess 530 of the rotating arm 526 is disengaged from the second groove 534, at this time the distal end surface 508 of the switching mechanism moves to be combined with the jaw driving mechanism, and then drives the jaw driving mechanism to advance. The advantage of this design is that the structure of the switching mechanism is simplified, and the overall structure is more compact.

[0208] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0209] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A clip applier comprising a housing, a transmission mechanism, and an actuator; the actuator is used to provide power to the transmission mechanism, at least part of the transmission mechanism is accommodated in the housing; the transmission mechanism is used to perform clip delivery, clip application, and clip pushing actions; characterized in that: The transmission mechanism includes a firing drive mechanism, a continuous firing drive mechanism, and a matching mechanism; the firing drive mechanism is used to perform the clip feeding action and the clip applying action, and the continuous firing drive mechanism is used to perform the clip pushing action; the matching mechanism includes a first matching member, an intermediate member, and a second matching member, the first matching member drives the second matching member through the intermediate member; the firing drive mechanism is linked to the first matching member; the continuous firing drive mechanism is linked to the second matching member; The movement direction of the first connecting member is opposite to the movement direction of the second connecting member.

2. The clip applier according to claim 1, wherein: The first connecting member includes an upper rack, the second connecting member includes a lower rack, and the intermediate member includes a first gear and a second gear; the upper rack is engaged with the first gear, and the lower rack is engaged with the second gear.

3. The clip applier according to claim 2, wherein: The first gear is coaxial with the second gear, and a diameter of the first gear is larger than a diameter of the second gear.

4. The clip applier according to claim 1, wherein: The first connecting member and the second connecting member are arranged along the longitudinal direction, and the intermediate member is arranged between the first connecting member and the second connecting member and along a direction perpendicular to the longitudinal direction.

5. The clip applier according to claim 1, wherein When the firing drive mechanism moves a first distance in a first direction, the continuous firing drive mechanism moves a second distance in a second direction opposite to the first direction; the first distance is greater than the second distance.

6. The clip applier according to claim 1, wherein: The firing drive mechanism includes a clip feeding drive mechanism and a jaw driving mechanism, and the transmission mechanism further includes a switching mechanism, the switching mechanism is connected to the first connecting member, the firing drive mechanism is linked to the first connecting member through the switching mechanism, and the switching mechanism is used to selectively drive the clip feeding drive mechanism or the jaw driving mechanism; When the actuating member is pressed, the switching mechanism, under the action of the actuating member, successively drives the clip delivery drive mechanism forward to perform the clip delivery action and drives the jaw drive mechanism forward to perform the clip application action, and simultaneously drives the first adapter member forward, thereby driving the continuous firing drive mechanism backward to store energy; the continuous firing drive mechanism includes a third reset member, and the third reset member is used to store the energy; The actuating member is released, and the continuous driving mechanism moves forward under the action of the third reset member to perform the pushing and clamping action.

7. The clip applier according to claim 6, wherein: The clamp feeding drive mechanism, the jaw driving mechanism and the continuous firing drive mechanism are all arranged along the longitudinal direction; the clamp feeding drive mechanism moves along the longitudinal direction inside the jaw driving mechanism; the continuous firing drive mechanism and the second connecting part move along the longitudinal direction inside the clamp feeding drive mechanism.

8. The clip applier according to claim 6, wherein: The continuous driving mechanism includes a push-clamp driving member, one end of the third reset member is connected to the shell, and the other end is connected to the proximal end of the second connecting member; the push-clamp driving member is connected to the distal end of the second connecting member; the push-clamp driving member is provided with a plurality of side cavities at intervals along the longitudinal direction, and each of the side cavities is correspondingly installed with a push-clamp block, and the push-clamp driving member drives the push-clamp block to move under the action of the third reset member to perform the push-clamp action.

9. The clip applier according to claim 8, wherein: A first guide groove and a second guide groove are provided in the housing. The first connecting member moves in the first guide groove. The second connecting member moves in the second guide groove. The third restoring member is located in the second guide groove.

10. The clip applier according to claim 8, wherein: The distal end of the second adapter has an accommodating space, and the proximal end of the push-and-clamp drive member is received in the accommodating space and is rotatable in the accommodating space; The proximal end of the push-and-clamp drive member has a stop portion that abuts against a limiting surface in the accommodating space, so that the proximal end of the push-and-clamp drive member and the distal end of the second fitting member are axially fixed.

11. The clip applier according to claim 1, wherein: The axis of the first connecting part is perpendicular to the axis of the intermediate part and parallel to the axis of the second connecting part; the axis of the second connecting part is coaxial with the axis of the proximal driving part of the continuous driving mechanism and the axis of the proximal driving part of the firing driving mechanism.

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