Clip Applier

Abstract

The present invention discloses a clamping forceps, comprising a wrench, a clamp, and a wrench locking mechanism. The wrench locking mechanism comprises a guide member and a guide channel located on the wrench. When a user operates the wrench to make a forward movement, the wrench moves from an open position to an intermediate position and then to a closed position, and the clamping forceps completes a clamping action at the intermediate position and completes a clamping action at the open position. In response to the wrench moving from the open position to the intermediate position and then to the closed position, the guide member moves relatively in the guide channel and moves from a starting point to a locking point and then to an end point. When the wrench moves forward and the wrench is not operated, the wrench happens to be in the intermediate position, and the guide member prevents the wrench from performing a reset movement at the locking point. The locking point of the wrench locking mechanism of the clamping forceps of the present invention can provide a pause point for the clamping action and the clamping action, and the doctor can observe the surgical situation at the pause point, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to a clip applier. Background Art

[0002] During surgical procedures, it is generally necessary to temporarily or permanently ligate the body's blood vessels or other tissues to reduce bleeding. There are two ways to ligate blood vessels. The first is to sew the blood vessels with a needle and surgical sutures, and the other is to clamp the blood vessels with a clip. The first suturing method requires doctors to perform complex suturing operations, which is time-consuming and difficult to perform in endoscopic surgery with limited space and low visibility. In contrast, the method of closing blood vessels with clips is simple and can be performed quickly. Therefore, the use of clips in endoscopic surgery has increased dramatically.

[0003] Usually, such clips are applied to blood vessels or other tissues by using an instrument, and the special instrument is usually called a clip applicator. Traditional clip applicators can only be used once. After installing a clip outside the body, the jaws of the clip applicator are sent into the body to apply the clip. Repeated installation of a single clip is inconvenient to use. In recent years, continuous clip applicators that can continuously apply multiple clips have become a trend. The continuous clip applicator includes a wrench operated by the user, a clip box, a jaw assembly and a transmission mechanism. There is a sequentially arranged clip in the clip box. When the user operates the wrench, the wrench first drives the transmission mechanism to make the farthest clip in the clip box enter the jaw assembly. This process is called the clip delivery process, and then the wrench drives the transmission mechanism to close the jaw assembly to compress the clip located therein. This process is called the clamp application process. The clip delivery process must be earlier than the clamp application process. The operation of the wrench can only be pressed to the bottom in one step, so that the clip delivery process is completed first and then the clamp application process is completed. The user cannot know the time when the clip delivery is completed, and thus cannot further adjust the position of the jaw assembly, resulting in poor user experience. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a clamp, comprising a shell and a wrench operated by a user, the wrench being movably connected to the shell, the user operating the wrench to make forward movement, and in response to the user operation, the wrench moves from an open position to an intermediate position and then to a closed position; a clamp box connected to the shell, the clamp box comprising a plurality of clamps; a jaw assembly connected to the clamp box; a clamp feeding drive mechanism and a jaw driving mechanism connected to the wrench, at least part of the clamp feeding drive mechanism and at least part of the jaw driving mechanism being accommodated in the shell, the clamp feeding drive mechanism driving the farthest clamp to move forward and enter the jaw assembly in response to the wrench moving from the open position to the intermediate position, the wrench being located When the wrench is in the intermediate position, the clamp is in the ready position; the jaw drive mechanism drives the jaw drive mechanism to move forward in response to the wrench moving from the intermediate position to the closed position, thereby driving the jaw assembly to close, and when the wrench is in the closed position, the jaw assembly is in a closed state; a wrench reset mechanism is connected to the wrench, and when the user does not operate the wrench, the wrench reset mechanism drives the wrench to perform a reset movement, and the direction of the reset movement is opposite to the forward movement; a wrench locking mechanism includes a guide member and a guide channel provided on the wrench and moving with the wrench, the guide channel includes a starting point, a locking point and an end point, at least a part of the guide member is accommodated in the guide channel, and the guide member moves relative to the guide channel;

[0005] The guide member moves from the starting point to the locking point in response to the wrench moving from the open position to the middle position, and the guide member moves from the locking point to the end point in response to the wrench moving from the middle position to the closed position; when the user operates the wrench to make a forward movement, if the wrench is located in the middle position when the wrench is not operated, the guide member prevents the wrench from making a reset movement at the locking point.

[0006] Preferably, in the guide channel, the guide member prevents the wrench from resetting only when the guide member is located at the locking point.

[0007] Preferably, the wrench moves forward between the intermediate position and the closed position before reaching the closed position. When the operation of the wrench stops, the wrench reset mechanism drives the wrench to reset to the intermediate position, the guide moves to the locking point, and the guide prevents the wrench from continuing to reset at the locking point.

[0008] Preferably, the guide channel is a closed groove.

[0009] Preferably, the wrench includes a wrench body, a user-operated pressing portion arranged at one end of the wrench body, and a pushing portion arranged at the other end of the trigger body, wherein the pushing portion drives the clamp feeding drive mechanism or the jaw driving mechanism to move; the wrench body is provided with a pivot end pivotally connected to the shell; the guide channel is located in the wrench body and between the pivot end and the pushing portion.

[0010] Preferably, the guide channel includes a main channel and only one slave channel extending from an opening of the main channel, the opening is located between the two ends of the main channel, the two ends of the main channel are respectively provided with the starting point and the end point, and the locking point is provided at one end of the slave channel away from the opening; the wrench locking mechanism also includes a wrench locking elastic element, which drives the guide member to disengage from the main channel and enter the slave channel.

[0011] Preferably, the slave channel includes a blocking wall, and when the wrench is not operated and the guide member is located at the locking point, the guide member abuts against the blocking wall in the resetting movement direction of the wrench, thereby preventing the wrench from performing the resetting movement at the locking point.

[0012] Preferably, the main channel comprises a first wall extending from a starting point to be connected to the barrier wall, and the first wall and the barrier wall form a right angle or an acute angle.

[0013] Preferably, the slave channel further comprises a guide wall connected to the blocking wall, wherein the guide wall guides the guide member to move bidirectionally between the locking point and the end point.

[0014] Preferably, the main channel further includes a second wall extending from the end point to be connected to the guide wall, and the second wall forms an obtuse angle with the guide wall.

[0015] Preferably, the wrench locking mechanism also includes a guide pivot member, which includes a pivot end pivotally connected to the shell, the guide member extending from the pivot end, and a force-bearing end, one end of the wrench locking elastic element abuts the force-bearing end, and the other end abuts the shell.

[0016] Preferably, the wrench locking elastic element is a spring.

[0017] Preferably, the guide pivot member further comprises a stop end extending from the pivot end, and before the wrench moves from the open position to the intermediate position, the stop end remains disengaged from the clamp feeding drive mechanism;

[0018] Before the wrench moves from the intermediate position to the closed position, the stop end maintains an abutment state with the clamp feeding drive mechanism to prevent the clamp feeding drive mechanism from retreating.

[0019] Preferably, the guide member has a first movement path when the wrench moves forward and a second movement path when the wrench moves back after reaching the closed position, the first movement path includes the main channel and the slave channel, the second movement path includes the main channel but does not include the slave channel; the clamp also includes a path switching member, and the path switching member is used to switch the first movement path and the second movement path.

[0020] Preferably, the path switching member has two states. When the path switching member is in a first state, the path switching member opens the slave channel to allow the guide member to enter or exit the slave channel. When the path switching member is in the second state, the path switching member blocks the guide member from entering the slave channel.

[0021] Preferably, the opening of the main channel includes a starting point and an end point; when the wrench moves forward, when the guide member is located at the starting point of the opening, the path switching member is in the first state; when the guide member enters the slave channel and the guide member moves from the slave channel to the end point of the opening, the path switching member is in the first state;

[0022] The wrench performs a reset movement after reaching the closed position, and when the guide member is located at the end point of the opening, the path switching member is in the second state and maintains the second state until the guide member moves to the starting point of the opening.

[0023] Preferably, during the period when the wrench moves forward from the open position to before reaching the closed position, the path switching member is in the first state;

[0024] When the wrench moves forward and reaches the closed position, the path switching member switches from the first state to the second state. After the wrench reaches the closed position, it performs a reset movement and moves from the closed position to the intermediate position, and the path switching member is in the second state.

[0025] Preferably, the wrench performs a reset movement after reaching the closed position, and when located at the open position, the path switching member is in the first state.

[0026] Preferably, the clip applier further comprises a path driving member, the path switching member is disposed in one of the wrench and the housing, and the path driving member is disposed in the other of the wrench and the housing;

[0027] When the wrench is in forward motion or in resetting motion, the path driving member abuts against the path switching member to drive the path switching member to move, so that the path switching member switches between the first state and the second state.

[0028] Preferably, the path switching member includes a pivoting portion, a triggering portion and an executing portion, the path switching member rotates with the pivoting portion as an axis, the triggering portion includes a first triggering portion and a second triggering portion respectively arranged on both sides of the pivoting portion; the path driving member is a guide rib, the guide rib includes a first guide rib and a second guide rib, the first guide rib has a first guide inclined surface, the second guide rib has a second guide inclined surface, the first guide rib is located at the front side of the first triggering portion, and the second guide rib is located at the rear side of the second triggering portion;

[0029] When the path switching member is in the first state and the first triggering part abuts against the first guide rib and moves along the first guide inclined surface, the path switching member rotates toward the first direction, and the path switching member switches from the first state to the second state; when the path switching member is in the second state and the second triggering part abuts against the second guide rib and moves along the second guide inclined surface, the path switching member rotates toward the second direction, and the path switching member switches from the second state to the first state; the first direction is opposite to the second direction; when the path switching member is in the first state, the execution part makes way for the slave channel to allow the guide member to enter or exit the slave channel, and when the path switching member is in the second state, the execution part blocks the guide member from entering the slave channel.

[0030] Preferably, the pivoting portion of the path switching member is connected to the wrench, and the guide rib is arranged on the inner side of the housing.

[0031] Preferably, the applying forceps also include a positioning mechanism, which includes a first positioning member and a second positioning member, the first positioning member is arranged at a pivot portion of the path switching path, the second positioning member includes a first pit, a second pit and a protrusion located between the first pit and the second pit arranged on the wrench, one of the first positioning member and the protrusion is an elastic element, when the first positioning member is located in the first pit, the path switching member is in the first state; when the second positioning member is located in the second pit, the path switching member is in the second state.

[0032] Compared with the prior art, the beneficial effects of the present invention are: the locking point of the wrench locking mechanism of the clamp of the present invention can provide a pause point for the clamp delivery and clamp application actions, and the doctor can observe the surgical situation at the pause point, thereby improving the user experience; the locking point is provided by utilizing the wrench's own structure, and the structure is simple; the guide channel on the wrench is a closed channel, the moving channel of the guide member is stable, and the locking effect of the wrench is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a three-dimensional schematic diagram of a clip applier provided in a first embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A front view of the clip applier shown with a portion of the housing hidden;

[0035] Figure 3 yes Figure 1 A perspective view of the clip applier shown with a portion of the housing hidden;

[0036] Figure 4A yes Figure 1 A schematic diagram of the front structure of the clip of the clip applier shown;

[0037] Figure 4B yes Figure 1 A schematic side view of the structure of the clip of the clip applier shown;

[0038] Figure 5 yes Figure 1 An exploded perspective view of the jaw assembly and shaft assembly of the clip applier shown;

[0039] Figure 6 yes Figure 1 A schematic structural diagram of a jaw drive mechanism of a clip applier shown;

[0040] Figure 7 yes Figure 6 An exploded perspective view of a portion of the jaw drive mechanism shown;

[0041] Figure 8 yes Figure 1 A schematic structural diagram of a clip delivery drive mechanism of the clip applier shown;

[0042] Fig. 9 yes Figure 8 A perspective exploded view of a clip delivery drive mechanism of the clip applier;

[0043] Fig.10 yes Figure 1 A front view of a clamp push rod and a coupling block of a clamp push drive mechanism of the clamp applier shown;

[0044] Fig.11 yes Fig.10A three-dimensional schematic diagram of a clamp push rod of a clamp push drive mechanism of a clamp applier shown;

[0045] Figure 12 to Figure 14 yes Figure 1 A schematic diagram of state changes of the transmission mechanism of the clip applier shown;

[0046] Fig.15A yes Figure 1 A cross-sectional view of the jaw assembly and the shaft assembly at MM when the wrench of the clip applier is in the open position;

[0047] Fig. 15B yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly at LL with the wrench of the clip applier shown in the open position;

[0048] Fig.16A yes Figure 1 A cross-sectional view of the jaw assembly and the shaft assembly at MM when the wrench of the clip applier is shown in the middle position;

[0049] Fig. 16B yes Figure 1 A cross-sectional view of the jaw assembly and the shaft assembly at LL with the wrench of the clip applier shown in the intermediate position;

[0050] Fig.17A yes Figure 1 A cross-sectional view of the jaw assembly and the shaft assembly at MM when the wrench of the clip applier is in the closed position;

[0051] Fig. 17B yes Figure 1 A cross-sectional view of the jaw assembly and the shaft assembly at LL with the wrench of the clip applier shown in the closed position;

[0052] Fig.18 yes Figure 1 An exploded perspective view of a portion of the switching mechanism of the clip applier shown;

[0053] Fig.19 yes Figure 1 Another perspective exploded view of a portion of the switching mechanism of the clip applier shown;

[0054] Fig. 20 yes Figure 1 A schematic diagram of the structure of the transmission mechanism of the knob assembly portion of the clip applier shown;

[0055] Fig.21 yes Figure 1 A schematic structural diagram of the coupling mechanism of the clip applier shown;

[0056] Fig. 22 yes Figure 1 The exploded schematic diagram of the adapter block of the clip applier shown is assembled with the second adapter;

[0057] Fig.23A yes Figure 1 A schematic diagram of the movement process of the clip delivery block of the clip applier shown;

[0058] Fig. 23B yes Fig.23A The schematic diagram of the motion trajectory of the clip delivery block of the clip applier shown;

[0059] Fig.24A yes Figure 1 The schematic diagram of the movement process of the clamp pusher block of the clamp applier shown;

[0060] Fig. 24B yes Fig.24A The schematic diagram of the motion trajectory of the clamp pusher block of the clamp applier shown;

[0061] Fig.25 yes Figure 2 A schematic structural diagram of a wrench of the clip applier shown;

[0062] Fig.26 yes Fig.25 A schematic diagram of the structure of the guide channel of the wrench of the clip applier shown;

[0063] Fig. 27 yes Figure 2 A schematic structural diagram of a guide pivot member of the clip applier shown;

[0064] Fig.28 yes Figure 2 A schematic diagram of the assembly of the guide pivot member of the clip applier and the wrench locking spring element is shown;

[0065] Fig.29 yes Figure 2 A schematic structural diagram of a path switching member of a clip applier is shown;

[0066] Fig.30 yes Figure 1 A schematic diagram of the internal structure of a portion of a housing of the clip applier shown;

[0067] Fig.31A yes Figure 2 A state diagram of the wrench locking mechanism when the wrench of the clip applier is in the open position;

[0068] Fig.31B yes Figure 2 The state diagram of the wrench locking mechanism when the wrench of the clip applier is moved forward to the middle position;

[0069] Fig.31C yes Figure 2 A state diagram of the wrench locking mechanism when the wrench of the clip applier is in the closed position;

[0070] Fig.31D yes Figure 2 The state diagram of the wrench locking mechanism when the wrench of the clamp applier is reset and moved to the middle position;

[0071] Fig.32 yes Figure 1 A cross-sectional view of the clip applier shown with respect to a perspective of a path switch;

[0072] Fig.33A yes Figure 1 A state diagram of the path switching member when the wrench of the clip applier is in the open position;

[0073] Fig.33B yes Figure 1 The state diagram of the path switching member when the wrench of the clip applier is moved forward to the first proximity position;

[0074] Fig.33C yes Figure 1 A state diagram of the path switching member when the wrench of the clip applier is in the closed position;

[0075] Fig.33D yes Figure 1 The state diagram of the path switching member when the wrench of the clip applier is reset and moved to the second adjacent position;

[0076] Fig.34 yes Figure 1 A schematic structural diagram of the jaw assembly of the clip applier shown;

[0077] Fig.35 yes Fig.34 A schematic structural diagram of a first clamping arm or a second clamping arm of the jaw assembly shown;

[0078] Fig.36 yes Fig.34 a cross-sectional view of a jaw assembly from one perspective shown;

[0079] Fig.37 yes Fig.34 A schematic diagram of the structure of the stopper and the clamp of the jaw assembly shown;

[0080] Fig.38 yes Fig.34 A schematic structural diagram of a stopper of the jaw assembly shown;

[0081] Fig.39 yes Fig.34 a cross-sectional view of another perspective of the jaw assembly shown;

[0082] Fig.40 yes Fig.34 A cross-sectional view of the jaw assembly assembly shown;

[0083] Fig.41 yes Fig.34 A schematic diagram of the jaw assembly shown in a closed state;

[0084] Fig.42 yes Fig.34 A schematic diagram of the jaw assembly shown in an open position;

[0085] Figure 43 to Figure 45 is a schematic diagram of state changes of a part of the transmission mechanism of the clip applier provided by the second embodiment of the present invention;

[0086] Fig.46 is a perspective exploded view of a portion of a switching mechanism of a clip applier provided in a third embodiment of the present invention;

[0087] Figures 47 to 50 is a schematic diagram of state changes of a part of the transmission mechanism of the surgical instrument provided by the third embodiment of the present invention;

[0088] Fig.51 is a perspective exploded view of a switching mechanism of a clip applier provided in a fourth embodiment of the present invention;

[0089] Figure 52 to Figure 54 1 is a schematic diagram of the state changes of a part of the transmission mechanism of the clip applier provided in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0090] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0091] The user of the surgical instrument may be a clinician, who operates the surgical instrument to perform the operation. The terms "proximal", "posterior", "distal", and "front" used herein are relative to the clinician who operates the surgical instrument. The terms "proximal" and "posterior" refer to the part relatively close to the clinician, and the terms "distal" and "front" refer to the part relatively far from the clinician. "Left" and "right" are used to refer to the part relatively close to the clinician. Figure 1 The positions of the surgical instruments shown are for reference, for example, the jaw assembly is on the "left" and the sleeve 210 is on the "right". The terms "upper" and "lower" are referenced to the relative positions of the upper jaw and the lower jaw of the jaw assembly, specifically, the upper jaw is on the "upper" and the lower jaw is on the "lower". It should be understood that the directions "proximal", "posterior", "distal", "front", "left", "right", "upper" and "lower" are defined for the convenience of description, however, the surgical instruments can be used in many directions and positions, so these terms expressing relative positional relationships are not limited and absolute.

[0092] In the present invention, unless otherwise clearly specified and limited, the terms such as "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a movable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. It should be noted that when there are qualifiers before "connected" and "connection", they have the meanings defined by the corresponding qualifiers, and only exclude situations that obviously need to be excluded, and do not exclude other possible situations. For example, "detachably connected" refers to a detachable connection, which does not include fixed connection and integration, but movable connection, direct connection, and indirect connection through an intermediate medium are not excluded.

[0093] The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention. The terms "axial" or "longitudinal" used herein refer to the length direction of the sleeve 210.

[0094] Figures 1 to 42 The surgical instrument of the first embodiment of the present invention is shown, specifically a continuous clamping forceps, which is used to apply clips to the human body, such as blood vessels or other tissues other than blood vessels. According to the overall positional relationship, the clamping forceps includes an operating component 300, a shaft component 200200 extending from the operating component 300, and a jaw component arranged at one end of the shaft component 200200. In order to continuously apply multiple clips, the clamping forceps needs to perform three actions: a clamping action, a jaw closing action (clamping action) and a clamping pushing action, and the clamping action must be followed by a jaw closing action. The above three actions need to be completed when the clamping forceps is used once. The number of times the clamping forceps is used depends on the number of clips contained therein.

[0095] The operating assembly 300 includes a main body 320 and a wrench (actuator 330) movably mounted on the main body 320. The main body 320 includes a housing 321. The wrench is movably connected to the housing 321. The housing 321 is divided into a substantially spindle-shaped cylindrical head housing 321 and a handle housing 321 extending from the lower side of the head housing 321 according to the positional relationship. The handle housing 321 and the wrench form a handle assembly. The user can grasp the handle housing 321 with one hand and pull the wrench with fingers to make the wrench move relative to the main body 320. The clip applier also includes a transmission mechanism, part of which is accommodated in the housing 321 of the operating assembly 300, and part of which is located in the shaft assembly 200200.

[0096] In order to realize the clamping action, jaw closing action (clamping action) and clamping pushing action, the transmission mechanism includes a clamping driving mechanism, a jaw driving mechanism and a clamping pushing driving mechanism. The wrench drives the transmission mechanism to move, thereby driving the clamping driving mechanism, the jaw driving mechanism and the clamping pushing driving mechanism to move. The clamping driving mechanism performs the clamping action, the jaw driving mechanism performs the jaw closing action (clamping action), and the clamping pushing driving mechanism performs the clamping pushing action. The specific details will be described in detail below.

[0097] like Figures 4A-4B As shown, the clip 10 of the clip applier includes a first clip arm 31, a second clip arm 32 and a connecting portion 33, wherein the connecting portion 33 is located between the first clip arm 31 and the second clip arm 32, and the two clip arms can pivot relative to each other around the connecting portion 33. The first clip arm 31 includes two first protrusions 41, and the second clip arm 32 includes two second protrusions 42. The first clip arm 31 also includes a first clamping portion 35, and the second clip arm 32 also includes a second clamping 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 clamping portion 35 is clamped with the second clamping 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, and the tissue located between the first clip arm 31 and the second clip arm 32 is clamped. At this time, the first clip arm 31 and the second clip arm 32 are combined. The first clamping arm 31 and the second clamping arm 32 of the clip 10 are defined as being in a closed state / locked state when they are combined with each other, and being in an open state when the first clamping arm 31 and the second clamping arm 32 of the clip 10 are separated from each other. The first clamping portion 35 is a tip portion disposed at the distal end of the first clamping arm 31, and the second clamping portion 36 is a curved C-shaped hook portion disposed at the distal end of the second clamping arm 32.

[0098] The jaw assembly includes a first clamp arm 31 and a second clamp arm 32 which are respectively pivotally connected to the shaft assembly 200200, and a clip 10 can be supported between the first clamp arm 31 and the second clamp arm 32. The jaw assembly switches between an open state and a closed state. In the open state, the jaw assembly clamps a clip in an open state. Due to structural limitations, the jaw assembly cannot be opened indefinitely. The open state of the jaw assembly includes an open state to the end, at which the distance between the distal ends of the first clamp arm 31 and the distal ends of the first clamp arm 32 in the vertical direction is the largest. When the jaw assembly is in a closed state, the distance between the distal ends of the first clamp arm 31 and the second clamp arm 32 in the vertical direction is the smallest. The closing of the jaw assembly causes the clip 10 to change from an open state to a closed state. The jaw proximal end drive member drives the sleeve 210 (jaw distal end drive member) to move forward and backward. The specific method is described in the movement method of the jaw drive mechanism described later. The sleeve 210 moves forward to cause the jaw assembly to close the jaw assembly, and the first and second jaw arms compress the clip located therein, and the sleeve 210 moves backward to cause the jaw assembly to open the jaw assembly.

[0099] The shaft assembly 200200 includes a clamp box 220, a base 240, a clamp delivery assembly, a clamp push assembly, and a sleeve 210 sleeved on the clamp box 220, the clamp delivery assembly, and the clamp push assembly. The clamp delivery assembly belongs to the clamp delivery drive mechanism, the clamp push assembly belongs to the clamp push drive mechanism, and the sleeve 210 belongs to the jaw drive mechanism.

[0100] The first end (distal end) of the cartridge 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 cartridge 220 can accommodate at most M clips, where M is greater than or equal to 2, which is related to the size of the cartridge 220. After the clamp applicator is used once, one clip in the cartridge 220 will be reduced. When the cartridge 220 contains N clips, N is less than or equal to M, and the N clips are arranged in sequence from the first end to the second end, namely the first clip, the second clip to the Nth clip. The first clip is closest to the first end and is first fed into the jaw assembly. The clips other than the first clip in the cartridge 220 are defined as other clips. The cartridge 220 includes M stations, which are arranged from the distal end to the proximal end of the cartridge 220, namely the first station, the second station, ... the Mth station, the first clip is located at the first station at the front end, and the second clip to the Nth clip are arranged in the corresponding order from the second station to the Nth station.

[0101] The clamp box 220 has a bottom wall 221, and the bottom wall 221 is formed with a plurality of transverse barbs 225 along its length, which are inclined toward the distal end of the clamp box 220 and toward the inside of the clamp box 220. The transverse barbs 225 are arranged at equal intervals, and the distal ends of the transverse barbs 225 are inclined ends. When the clip moves forward along the axial direction, the clip slides and contacts the transverse barbs 225 in front to bend toward the bottom wall 221 so as to smoothly pass through the transverse barbs 225, so that the clip enters the adjacent front-end station from the current station; the inclined ends of the transverse barbs 225 abut against the rear side of the clip to prohibit the clip from retreating, thereby prohibiting the clip from entering the adjacent rear-end station from the current station. It can be seen that the transverse barbs 225 have a one-way locking function to prevent the clip from retreating between adjacent stations.

[0102] In this embodiment, a first transverse barb 225 and a second transverse barb 225 are arranged between two adjacent workstations. When the first transverse barb 225 clamps a first protrusion 41 behind the clip, the second transverse barb 225 clamps the second protrusion 42 on the same side of the same clip behind the clip to prevent the clip from entering the adjacent rear-end workstation from the current workstation in the clip box 220. In this embodiment, there are multiple first transverse barbs 225 and multiple second transverse barbs 225, which are arranged in two rows on both sides of the width of the bottom wall 221, and the adjacent transverse barbs 225 in each row are equidistant in the axial direction.

[0103] In this embodiment, the clamp box 220, the clamp delivery assembly and the clamp pushing assembly at the shaft assembly 200200 form a special three-layer design, and the specific details are as follows.

[0104] When the clamp is in an open state, a clamping surface is formed between the first clamp arm and the second clamp arm. The clamp feeding assembly is used to abut and push the first clamp forward to enter the jaw assembly; the clamp pushing assembly is used to abut and push the second clamp until the Nth clamp moves forward; the jaw assembly is used to receive a clamp (first clamp) from the clamp box 220 and perform a closing action to compress the clamp to a closed state. The clamp feeding assembly is located on the first side of the clamping surface of the clamp, and the clamp pushing assembly is located on the second side of the clamping surface of the clamp, and the first side is different from the second side. The clamp feeding assembly and the clamp pushing assembly are independent components, which are respectively located on both sides of at least one clamp, and independently push the first clamp or other clamps from both sides, so that the forward length of the clamp feeding and the forward length of the clamp pushing do not need to be equal, and the size design of the jaw assembly and the size design of the clamp box 220 can be independent of each other, which provides design space for independently optimizing the structure of the jaw assembly and the structure of the clamp box 220, and also provides design space for optimizing the structure of the clamp pushing assembly and the clamp feeding assembly itself. The clamping forceps have a simple structure and a more compact size.

[0105] In the prior art, an integrated pushing plate is used, and the clamp feeding plate and the clamp pushing plate must be sheet-shaped, otherwise the clamp feeding plate and the clamp pushing plate will collide and interfere with the clamp when retreating, but the sheet-shaped structure is not rigid enough and is easy to bend, resulting in instability in clamp feeding and clamp pushing, and it is formed in one piece, which has high requirements on the production process; the size design of the jaw assembly must meet the forward length of clamp feeding, and the distance between two adjacent clamps in the clamp box 220 is equal to the forward length of clamp pushing. For this push plate that pushes and feeds the clamps simultaneously, the forward length of clamp feeding is equal to the forward length of clamp pushing, resulting in the size design of the jaw assembly and the size design of the clamp box 220 must match each other, the size of the clamping forceps is not compact and the design is complicated. For example, the distance between adjacent clamps in the clamp box 220 cannot be too small, otherwise the size of the jaw assembly is too small to stably clamp the first clamp, and the size of the jaw assembly cannot be too large, otherwise the distance between adjacent clamps in the clamp box 220 is large, resulting in a long size of the clamp box 220 and a large overall size of the clamping forceps. In the present embodiment, the clamp delivery assembly and the clamp pushing assembly are separated, and the distance between the clamps in the clamp box 220 can be designed to be small enough without considering the forward length of the clamp pushing assembly. The movable channel of the clamp of the jaw assembly can be designed to be long enough to meet the requirements of stable guiding, clamping and compression of the clamp without being restricted by the distance between the clamps. In addition, the clamp delivery assembly and the clamp pushing assembly can be individually designed to be rigid enough to solve the problem of the inability to stably push the clamps in the prior art.

[0106] The first clamp arm and the second clamp arm respectively have a center line, and the clamp includes a first side surface and a second side surface that are parallel. Since the clamp is roughly C-shaped in the open state, the first side surface and the second side surface in the open state are both C-shaped. In one determination method, the clamping surface is a surface formed by two center lines of the first clamp arm and the second clamp arm, and the two sides of the surface are the first side and the second side of the clamping surface where the clamp feeding assembly and the clamp pushing assembly are respectively arranged. In another determination method, the first side surface of the C-shape is formed with a first clamping surface, and the second side surface is formed with a second clamping surface. The first clamping surface and the second clamping surface are between the inner side, and the two outer sides of the first clamping surface and the second clamping surface are the first side and the second side of the clamping surface where the clamp feeding assembly and the clamp pushing assembly are respectively arranged.

[0107] In this embodiment, when the clip is installed in the clip box 220, the two clip arms of the clip are respectively pressed by the first side wall 222 and the second side wall 223 and compressed, but not compressed to a closed state, the clip plane is parallel to the bottom wall 221, and the multiple clamping surfaces of the multiple clips are on the same plane. In other embodiments, the multiple clips can be arranged obliquely in the clip box 220, the clamping surfaces of the multiple clips are not on the same plane, but the clamping surfaces of the multiple clips are parallel to each other, and the clip feeding assembly and the clip pushing assembly are still arranged on the first side and the second side of each clamping surface relative to the clamping surface.

[0108] The clamp box 220 includes a bottom wall 221 extending in the length direction and a first side wall 222 and a second side wall 223 opposite to each other, so as to form a substantially C-shaped structure. When the clamp box 220 accommodates the clamp, the clamping surface of the clamp is parallel to the bottom wall 221; the clamp feeding assembly is located on the outer side of the bottom wall 221 of the clamp box 220, and the clamp pushing assembly is located on the inner side of the bottom wall 221 of the clamp box 220. In this way, the clamp feeding assembly and the clamp pushing assembly push the first clamp and other clamps from both sides of the clamp box 220 separately, and the space in the sleeve 210 and on both sides of the clamp box 220 is fully utilized, the design freedom of the clamp pushing assembly and the clamp feeding assembly is improved, and the clamp applicator structure is more stable and compact. The inner side and the outer side of the bottom wall 221 refer to the two sides of the plane where the bottom wall 221 is located, and the clamp, the first side wall 222 and the second side wall 223 are located on the inner side of the bottom wall 221.

[0109] The bottom wall 221 of the clamp box 220 has an opening, which is arranged near the far end of the bottom wall 221. The clamp feeding assembly enters the clamp box 220 from the opening and is located between the first clamp and the second clamp. The opening ensures that the clamp feeding assembly can smoothly enter and exit the clamp box 220 and enter between the first clamp and the second clamp, thereby abutting against the first clamp at the rear end of the first clamp to push it forward. Preferably, a part of the opening is located at the first station, and the other part is located at the second station.

[0110] The clip delivery assembly includes an elastic push rod 232 and a clip delivery block 231 connected to one end of the elastic push rod 232, and the clip delivery block 231 is used to abut and push the first clip; the base 240 is provided with a channel for accommodating the clip delivery assembly and for its axial movement, and the channel includes an axially extending guide groove 241 and a block groove 242 connected to the guide groove 241, and the block groove 242 includes a guide slope 498243, and the guide slope 498243 is set at an angle with the axial direction. Specifically, when the base 240 and the clamp box 220 are installed together, the guide slope 498243 is inclined toward the far end and toward the clamp box 220, and the elastic push rod 232 is composed of a plurality of metal sheets stacked together, and is elastic and can be bent. At the initial moment, the clamping block 231 is parallel to the elastic push rod 232 along the axial direction, the guide groove 241 accommodates the elastic push rod 232, the block groove 242 accommodates the clamping block 231, the guide groove 241 guides the elastic push rod 232 to move along the axial direction, and the guide slope 498243 guides the clamping block 231 to enter the opening. Specifically, when the elastic push rod 232 moves axially forward along the guide groove 241, when the front end of the clamping block 231 abuts against the guide slope 498243, the elastic push rod 232 begins to bend, and the clamping block 231 obliquely enters the opening of the clamp box 220 along the guide slope 498243, thereby abutting against the first clamp at the rear end of the first clamp to push it forward, and then, the elastic push rod 232 moves axially backward along the guide groove 241, driving the clamping block 231 to retreat from the opening to the block groove 242 along the guide slope 498243. The base 240 has strong rigidity, and its channel accommodates the clip delivery assembly, ensuring that the clip delivery assembly is stably and reliably arranged in the clamping forceps at the initial moment. At the same time, the guide groove 241 provides a fixed channel for the elastic elastic push rod 232, limiting its movement space, and preventing the elastic push rod 232 from excessive bending or even bending during movement, blocking in the sleeve 210, and affecting the clip delivery function. Compared with the inclined clip delivery piece in the prior art, the rigid guide slope 498243 ensures the stability of the movement of the clip delivery block 231. The bottom wall 221 of the clamp box 220 also includes a first bottom wall 221a221 located at the front end of the opening and a second bottom wall 221b221 located at the rear end of the opening; when the base 240 is installed to the clamp box 220, the guide slope 498 is connected to the first bottom wall 221a221. The guide slope 498 is directly connected to the first bottom wall 221a221, with almost no gap, which can ensure that the clamping block 231 can smoothly enter the opening without any hindrance and will not be accidentally stuck. The thickness of the clamping block 231 is greater than the thickness of the elastic push rod 232. The elastic push rod 232 adopts a thin and elastic structure, which ensures that it can bend along the guide slope 498243, so that the clamping block 231 can move along the guide slope 498243.The greater the thickness of the clamping block 231, the greater the strength of the clamping block 231, and the less likely it is to deform. In addition, due to the greater thickness, the clamping block 231 forms a first abutting surface 486 at the far end that contacts the clamp, and the first abutting surface 486 has a larger area, and can stably push the first clamp. Preferably, the clamping block 231 and the elastic push rod 232 are independent parts, and can be fixed by welding.

[0111] The clip delivery assembly also includes an axially extending clip delivery rod 233, one end of the clip delivery rod 233 is connected to the elastic push rod 232, and the other end is connected to the operating assembly 300, and the guide groove 241 accommodates the clip delivery rod 233. The operating assembly 300 drives the clip delivery rod 233 to move axially, so that the clip delivery rod 233 drives the elastic push rod 232 and the clip delivery block 231 to move together. The clip delivery rod 233 is a cylindrical rod or a square rod or similar structure. Different from the elastic elastic push rod 232, the clip delivery rod 233 has strong rigidity and is not easy to deform, which avoids the elastic push rod 232 from being easily bent in the guide groove 241 during axial movement to cause the clip delivery assembly to be blocked, thereby improving the stability of the clip delivery assembly movement.

[0112] The guide groove 241 of the base 240 also accommodates the clamping rod 233 and guides the clamping rod 233 to move axially. The clamping rod 233 moves axially along the path planned by the guide groove 241 of the base 240, thereby enhancing the stability of the axial movement of the clamping rod 233. The clamping push assembly is a clamping push seat 250, which includes a clamping push block 253, an elastic member 254, and a clamping push rod 251. The clamping push rod 251 is provided with a side cavity 252, and the side cavity 252 or the clamping push block 253 is provided with a rotating shaft 255. The clamping push block 253 is rotatably installed in the side cavity 252 through the rotating shaft 255. The clamping block 253 includes an abutting end, which can abut and push the clip forward. The abutting end is arranged at the distal end of the clamping block 253. One end of the elastic member 254 is connected to the clamping block 253, and the other end is connected to the clamping rod 251. The elastic member 254 provides the clamping block 253 with a force to rotate toward the outside of the side cavity 252, specifically to make the abutting end of the clamping block 253 tilt toward the clip. In this embodiment, corresponding to the above-mentioned multiple stations, the clamping rod 251 is provided with multiple side cavities 252 at intervals, and each side cavity 252 is provided with an elastic member 254 and a clamping block 253. When the clamping assembly advances axially, the abutting ends of the multiple clamping blocks 253 respectively abut and push a clip forward. When the clamping assembly retreats axially, the clamping block 253 is squeezed by the clip and rotates into the side cavity 252, avoiding the clip, thereby preventing the clamping block 253 from retreating with the clip when retreating. The clamping block 253 has a certain thickness, so that the abutting end of the clamping block 253 is a second abutting surface 486 with a certain area, which ensures the stability of the abutment with the clamp. The abutting end can also be set as a recess, and the clamp arm of the clamp just fits into the recess, further enhancing the stability of the abutment. The clamping assembly is the clamping distal end driving member in the present invention.

[0113] The first side wall 222 and the second side wall 223 of the clamp box 220 are respectively provided with protruding first and second clamp strips, and the upper and lower surfaces of the clamp push rod 251 of the clamp push seat 250 are respectively provided with first and second clamp grooves that cooperate with the first and second clamp strips, so that the clamp push seat 250 can be slidably installed in the clamp box 220.

[0114] Furthermore, the operating assembly 300 also includes a coupling mechanism, the actuator 330 is used to provide power to the clamp feeding assembly and the clamp pushing assembly, the coupling mechanism includes a first coupling member, an intermediate member, and a second coupling member, the first coupling member drives the second coupling member through the intermediate member, the clamp feeding assembly is linked to the first coupling member, the clamp pushing assembly is linked to the second coupling member, and the movement direction of the first coupling member is opposite to the movement direction of the second coupling member. The specific structure of the coupling mechanism, the movement process, and the linkage mode of the coupling mechanism with the clamp feeding assembly and the clamp pushing assembly are described in detail below, and the benefits are the same as shown below, so they will not be repeated.

[0115] In this embodiment, the transmission mechanism includes a clip feeding drive mechanism and a jaw driving mechanism, the clip feeding drive mechanism is used to drive the clip into the jaw assembly, and the jaw driving mechanism is used to drive the jaw assembly to move. The transmission mechanism also includes a switching mechanism for selectively driving the clip feeding drive mechanism or the jaw driving mechanism; the transmission mechanism includes 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 clip feeding drive mechanism to drive the clip feeding drive mechanism to move; in the second state, the switching mechanism is separated from the clip feeding drive mechanism, and combined with the jaw driving mechanism to drive the jaw driving mechanism to move. In this embodiment, when the switching mechanism drives the clip feeding drive mechanism to move, the jaw driving mechanism is not driven and is in a stationary state. When the switching mechanism is separated from the clip feeding drive mechanism, the clip feeding drive mechanism no longer moves forward, and the switching mechanism is combined with the jaw driving mechanism to drive the jaw driving mechanism to move. In this process, energy is selectively transferred to the clip feeding drive mechanism or the jaw driving mechanism, so the energy consumption is small, and the force required for the doctor to operate the actuator 330 is correspondingly reduced, and the operation is more comfortable, so as to better operate the clip applicator and improve the product experience. In addition, the movement of the clamp feeding drive mechanism and the jaw drive mechanism is independent and time-sharing, which can also prevent other problems caused by the linkage between the two, such as complex structure, complex movement relationship, etc.

[0116] The switching mechanism includes a first clutch mechanism and a second clutch mechanism, the first clutch mechanism is connected to the second clutch mechanism, and when the switching mechanism moves under the action of the actuator 330, the first clutch mechanism moves together with the second clutch mechanism; in the first state, the first clutch mechanism is combined with the clip feeding drive mechanism to drive the clip feeding drive mechanism to move, and the second clutch mechanism is separated from the jaw driving mechanism; in the second state, the first clutch mechanism is separated from the clip feeding drive mechanism, and the second clutch mechanism is combined with the jaw driving mechanism to drive the jaw driving mechanism to move. Specifically, the first clutch mechanism includes a first clutch member and a clutch switching mechanism; the first clutch member is connected to the clutch switching mechanism; in the first state, the first clutch member is combined with the clip feeding drive mechanism; in the second state, the first clutch member is separated from the clip feeding drive mechanism. The second clutch mechanism includes a second clutch member, and the second clutch member is connected to the first clutch mechanism. In order to make the structure of the switching mechanism simpler and more compact, the second clutch member is the distal end of the first clutch mechanism, specifically, the distal end of the first clutch member. In one embodiment, the distal end of the first clutch mechanism is its distal end surface 508; in the first state, the distal end surface 508 of the first clutch mechanism is separated from the proximal end surface 502 of the jaw drive mechanism, and in the second state, the distal end surface 508 of the first clutch mechanism is combined with the proximal end surface 502 of the jaw drive mechanism. In another embodiment, the distal end of the first clutch mechanism is a hook protruding at its distal end, and the proximal end of the jaw drive mechanism is provided with a groove 314 matching the hook. In the first state, the hook is not inserted into the groove 314 of the jaw drive mechanism, and in the second state, the hook is inserted into the groove 314 of the jaw drive mechanism to drive the jaw drive mechanism to move.

[0117] The clutch switching mechanism includes a moving part and a moving guide, and the moving part is connected to the first clutch; when the moving part is guided by the moving guide to move from the first position to the second position, the first clutch and the clamp driving mechanism are switched from a combined state to a separated state. Specifically, the moving part is a guide column 490 connected to the first clutch, and the moving guide is a guide rail arranged in the shell 321, and the guide column 490 can move on the guide rail. The head shell 321 of the clamping forceps includes a first head shell 321 and a second head shell 321, and the first head shell 321 and the second head shell 321 are axially symmetrically arranged, and the guide rail is selectively arranged on the inner wall of the first head shell 321 or the inner wall of the second head shell 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 shell 321 and the second head shell 321. The guide rail includes a first guide surface 494 and a second guide surface 496 higher than the first guide surface 494; the guide post 490 is located on the first guide surface 494 when in the first position, and is located on the second guide surface 496 when in the second position. The first guide surface 494 is smoothly connected to the second guide surface 496 through the inclined surface 498, so that the movement of the moving part is smoother. The guide post 490 can move on the guide rail following the movement of the first clutch. When the guide post 490 moves on the first guide surface 494, the first clutch and the clamp feeding drive mechanism remain in a combined state. Since the guide rails arranged in the housing 321 have different heights, when the moving part moves to the second guide surface 496 of the guide rail, the first clutch is driven to move upward to separate from the clamp feeding drive mechanism, and when the first clutch is separated from the clamp feeding drive mechanism, the distal end of the first clutch mechanism is combined with the proximal end of the jaw driving mechanism to drive the jaw driving mechanism to move. The advantages of such a configuration are that, on the one hand, the clutch switching mechanism has a simple structure, does not require additional devices, and fully utilizes the internal space of the housing 321, with a compact structure; on the other hand, it consumes less power, and the operation is smooth and labor-saving.

[0118] The switching mechanism has a switching mechanism body 320. In order to make the overall structure of the switching mechanism more compact, fully utilize the space inside the clamping forceps, and make the movement of the switching mechanism more stable and smooth, part of the first clutch mechanism is accommodated in the body 320. Specifically, the body 320 includes a proximal surface 502, a distal surface 508, a first through hole 404510 penetrating the proximal surface 502 and the distal surface 508, and a second through hole 404512 penetrating the upper surface of the switching mechanism and the upper arc surface of the first through hole 404510; the first through hole 404510 is used for the clip delivery drive mechanism to pass through; the second through hole 404512 is used to accommodate the first clutch. The second clutch is the distal end of the switching mechanism body 320, and the distal end can be the distal surface 508 as described above. In the first state, the distal end of the switching mechanism is spaced apart from the proximal end of the jaw drive mechanism; in the second state, the distal end of the switching mechanism is matched with the proximal end of the jaw drive mechanism. The first clutch member includes a card block 482, which is received in the second through hole 404512, and the clip delivery drive mechanism includes a card slot, and the card block 482 cooperates with the card slot to combine the first clutch member with the clip delivery drive mechanism. The card 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 to the guide column 490, and the second end is detachably connected to the card slot; the first clutch member also includes an elastic element, such as a spring, and in the first state, the elastic element gives the card block 482 a downward force, so that the card block 482 abuts against the card slot, so that the first clutch member can be well combined with the clip delivery drive mechanism, and the stability of the clip delivery action is improved. In this embodiment, in order to make the overall structure simpler and more compact, the card slot is an annular groove 438 provided on the outer peripheral surface of the proximal end of the clip delivery drive mechanism, and the second end of the card block 482 includes an arc surface 484 matching the bottom surface of the annular groove 438, and an abutting surface 486 connected to the arc surface 484, and the abutting surface 486 abuts against the end surface of the annular groove 438. The card block 482 can better push the clip delivery drive mechanism through the matching of the arc surface 484 and the bottom surface of the annular groove 438, and the matching of the abutting surface 486 and the end surface of the annular groove 438. Of course, in other embodiments, the first clutch member may also include a groove 314, and the clip delivery drive member includes a protrusion 440 matching the groove 314.

[0119] In this embodiment, the switching mechanism is sleeved on the clamp feeding drive mechanism. In the first state, the switching mechanism and the jaw driving mechanism are spaced apart, and the clamp feeding drive mechanism is pushed forward by an external force, and the proximal end surface 502 of the clamp feeding drive mechanism and the proximal end surface 502 of the jaw driving mechanism gradually approach each other; in the second state, the switching mechanism is separated from the clamp feeding drive mechanism, and is connected with the jaw driving mechanism to drive the jaw driving mechanism forward, and the proximal end surface 502 of the jaw driving mechanism and the proximal end surface 502 of the clamp feeding drive mechanism gradually move away from each other. In order to make the overall layout of the transmission mechanism more reasonable and the structure more compact, and also to increase the contact area between the switching mechanism and the jaw drive mechanism to make the drive more stable, the jaw drive mechanism is arranged on the clamp feeding drive mechanism, that is, the clamp feeding drive mechanism is partially located in the jaw drive mechanism and can pass through the jaw drive mechanism; the clamp feeding drive mechanism and the jaw drive mechanism move along the longitudinal direction under the action of the switching mechanism, and the projection of the clamp feeding drive mechanism on the plane perpendicular to the longitudinal direction is located inside the projection of the jaw drive mechanism on the plane, and the projection of the jaw drive mechanism on the plane is located inside the projection of the switching mechanism on the plane.

[0120] The actuator 330 is used to provide power to the transmission mechanism. Specifically, the actuator 330 abuts against the switching mechanism, thereby driving the switching mechanism to move, and the switching mechanism selectively transmits the power to the clamp feeding drive mechanism or the jaw drive mechanism; the proximal end of the switching mechanism has a driving surface 504 and a stopper 506, wherein the driving surface 504 abuts against the actuator 330 to receive the power, and the stopper 506 is used to limit the actuator 330. The driving surface 504 is a concave surface formed by the stopper 506 and the surface of the switching mechanism, and the head of the actuator 330 abuts against the concave surface. In order to make the force applied by the actuator 330 to the switching mechanism more uniform and make it move forward smoothly, the stopper 506 is symmetrically arranged on both sides of the proximal end of the switching mechanism in its travel direction. Correspondingly, the actuator 330 has a gripping portion and a symmetrically arranged push claw extending from the gripping portion to the inside of the housing 321, and the two push claws respectively abut against the driving surface 504 on both sides of the switching mechanism. The stopper 506 protrudes from the outer surface of the switching mechanism and extends in the longitudinal direction. The inner walls of the first head shell 321 and the second head shell 321 of the clamp are symmetrically provided with guide grooves matching the stopper 506. The stopper 506 can move in the longitudinal direction in the guide groove, and the guide groove can limit the height direction of the stopper 506. This can effectively reduce the shaking of the switching mechanism during movement and make the transmission more stable and reliable.

[0121] The clamp applier also includes a clip delivery stop mechanism, which includes a bias spring and a guide pivot 350, and the guide pivot 350 is the guide pivot 350 described below including a stop end 354. The guide pivot 350 includes a pivot end 352 pivotally connected to the housing 321, and a guide member 351 and a stop end 354 extending outward from the pivot end 352; the guide member 351 is movably connected to the actuator 330, and the movement of the actuator 330 drives the guide member 351 and the stop end 354 to move around the pivot end 334 under the action of the bias spring; in the first state, the stop end 354 gradually approaches the proximal end of the clip delivery drive mechanism; in the second state, the stop end 354 abuts against the proximal end of the clip delivery drive mechanism to prevent the clip delivery drive mechanism from retreating.

[0122] The stopper 354 of the clip delivery stop mechanism can move to the proximal end of the clip delivery drive mechanism and abut against the clip delivery drive mechanism at the moment when the switching mechanism is separated from the clip delivery drive mechanism to prevent the clip delivery drive mechanism from retreating. However, in order to prevent the clip delivery stop mechanism from being unable to abut against the clip delivery drive mechanism due to component size deviation, motion error, etc., causing the clip to retreat, the stopper 354 of the clip delivery stop mechanism can move to the proximal end of the clip delivery drive mechanism before the switching mechanism is separated from the clip delivery drive mechanism. When the switching mechanism is separated from the clip delivery drive mechanism, the clip delivery drive mechanism retreats a short distance under the action of the first reset member 418 until it abuts against the stopper 354 of the clip delivery stop mechanism, thereby preventing the clip delivery drive mechanism from retreating further and causing the clip to retreat. Since the elastic push rod 232 of the clamp delivery drive mechanism is elastic and is compressed when the clamp delivery drive mechanism moves forward, the elastic push rod 232 gradually recovers its deformation when the clamp delivery drive mechanism retreats a short distance under the action of the first reset member 418. At this time, the clamp delivery block 231 still presses against the clamp, so the clamp does not retreat when the clamp delivery drive mechanism retreats a short distance.

[0123] The actuator 330 has a guide channel 340, which includes a starting point a, an end point and a locking point b located between the starting point a and the end point; the distance from the starting point a to the pivot center of the actuator 330 and the distance from the end point to the pivot center of the actuator 330 are both smaller than the distance from the locking point b to the pivot center of the actuator 330; when the actuator 330 rotates around its pivot center, the guide channel 340 rotates accordingly, so that the guide channel 340 and the guide member 351 move relative to each other, and the guide member 351 can pass through the starting point a, the locking point b and the end point in sequence with the movement of the actuator 330; in the first state, the guide member 351 gradually moves relative to the locking point b, and the stop end 354 gradually approaches the proximal end of the clamp feeding drive mechanism; in the second state, when the guide member 351 moves relative to the locking point b, the stop end 354 abuts against the proximal end of the clamp feeding drive mechanism to prevent the clamp feeding drive mechanism from retreating. The existence of the clip delivery and withdrawal prevention mechanism can prevent the clip in the jaw assembly from withdrawing and causing the problem of being unable to clamp the blood vessel or tissue, thereby improving the reliability and safety of the operation. A more detailed introduction to the actuator 330 will be expanded later.

[0124] The jaw drive mechanism includes a jaw proximal drive member and a jaw distal drive member connected to the jaw proximal drive member. When the switching mechanism is in the second state, the jaw proximal drive member is driven to move, and then the jaw distal drive member is driven to move. In this embodiment, the jaw proximal drive member is a jaw drive tube 432, and the jaw distal drive member is a sleeve 210. One end of the sleeve 210 is connected to the jaw drive tube 432, and the other end is matched with the jaw assembly; when the second state, the switching mechanism is combined with the jaw drive tube 432 to drive the jaw drive tube 432 to move, and then the sleeve 210 is driven to move to drive the jaw assembly to close. The distal inner wall of the jaw drive tube 432 is provided with convex ribs 436 at intervals, and the adjacent convex ribs 436 and the inner wall of the jaw drive tube 432 form an annular groove 438. The proximal outer periphery of the sleeve 210 is provided with an annular sheet 442, which is embedded in the annular groove 438, and the convex ribs 436 abut against the annular sheet 442. The annular sheet 442 is provided with notches 444 symmetrically in the circumferential direction, and the annular groove 438 is provided with a protrusion 440 matching the notch 444. The protrusion 440 is combined with the notch 444 so that the sleeve 210 is installed in place and fixed in the jaw drive tube 432. The jaw drive mechanism also includes a second reset member 446, such as an elastic element. The elastic element is sleeved outside the jaw drive tube 432, one end of the elastic element abuts against the baffle 434 on the outer surface of the jaw drive tube 432, and the other end extends forward and abuts against the inner wall of the housing 321 of the clamp applier. The elastic element is used to store energy when the jaw drive mechanism moves forward, and the elastic element recovers the deformation and releases the energy to provide power for the jaw drive mechanism to reset and retreat.

[0125] The clip delivery driving mechanism includes a clip delivery proximal end driving member and a clip delivery distal end driving member connected to the clip delivery proximal end driving member; when the switching mechanism is in the first state, the clip delivery proximal end driving member drives the clip delivery proximal end driving member to move, and then drives the clip delivery distal end driving member to move. The clip delivery distal end driving member includes a base 240 and a clip delivery assembly, and a channel is provided in the base 240; in the first state, the switching mechanism is combined with the clip delivery proximal end driving member to drive the clip delivery proximal end driving member to move, and then drives the clip delivery assembly to move in the channel to drive the clip to enter the jaw assembly. More specifically, a guide slope 498243 is provided at the distal end of the channel, and the clip delivery proximal end driving member drives the clip delivery assembly to move in the channel and moves through the guide slope 498243 to abut against the first clip in the clip box 220, and then drives the first clip to enter the jaw assembly. In this embodiment, the proximal driving member for clip delivery is a clip delivery driving tube 402, which is fixedly connected to the clip delivery assembly, and the clip delivery driving tube 402 is partially located in the jaw driving tube 432 and can move in the jaw driving tube 432. The base 240 is located outside the cartridge 220, and its first end is fixedly connected to the housing 321 and is located inside the clip delivery driving tube 402, and its second end extends from the first end to the distal end, and the second end is fixedly connected to the convex piece on the outside of the cartridge 220 through the pin 316. The clamp delivery assembly includes a clamp delivery rod 233, an elastic push rod 232 and a clamp delivery block 231 connected in sequence. Specifically, the proximal end of the clamp delivery rod 233 has a bent portion 406, and the distal end of the clamp delivery drive tube 402 has a hole 404 that matches the bent portion 406 for accommodating the bent portion 406 of the clamp delivery rod 233. The bent portion 406 at the proximal end of the clamp delivery rod 233 passes through the proximal end of the channel of the base 240 and is installed in the hole 404 that matches the bent portion at the distal end of the clamp delivery drive tube 402. The distal end of the clamp delivery rod 233 has a receiving groove 408, and the proximal end of the elastic push rod 232 has a clamping portion 410 that matches the receiving groove 408. The clamping portion 410 is inserted into the receiving groove 408 to realize the connection between the elastic push rod 232 and the clamp delivery rod 233; the distal end of the elastic push rod 232 has an arc-shaped recess 412, and the proximal lug 414 of the clamp delivery block 231 cooperates with the arc-shaped recess 412 to realize the connection between the elastic push rod 232 and the clamp delivery head. The channel of the base 240 provides a space for accommodating the clamp delivery assembly on the one hand, and also facilitates the movement of the clamp delivery assembly in the channel on the other hand. The clamp delivery drive tube 402 drives the clamp delivery block 231 to move in the channel and move through the guide slope 498243 to abut against the clamp, thereby driving the clamp to enter the jaw assembly. In order to enhance the strength of the elastic push rod 232 and improve the stability of clip delivery, two or more elastic push rods 232 are provided, and each elastic push rod 232 is formed by stacking multiple pieces. The elastic push rod 232 itself is elastic and can be deformed and bent, so that the clip delivery block 231 can deliver the clip to the right position. For the structures corresponding to the clip delivery block 231, the clip and the clip box 220, refer to the above detailed description, which will not be repeated here. The clip delivery drive mechanism also includes 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 close to the clamp delivery drive tube 402, and the other end extends backward and abuts against the distal surface 508 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 resetting the clamp delivery drive mechanism.

[0126] The clamp applier also includes a knob 310, wherein the knob 310 has a protrusion 312 at the proximal end, and a recessed portion matching the protrusion 312 is provided in the distal end of the operating assembly 300, and the recessed portion and the protrusion 312 cooperate with each other so that the knob 310 and the operating assembly 300 are assembled together. A pin 316 is provided in the knob 310, and the clip delivery drive tube 402 is provided with a first waist-shaped hole 420 404, and the jaw drive tube 432 is provided with a second waist-shaped hole 404 448. The proximal end of the base 240 is accommodated in the clip delivery drive tube 402, and is provided with a first pin hole 416 404, and the pin 316 cooperates with the first pin hole 416 404, so that the base 240 and the knob 310 are fixedly installed. The proximal end of the cartridge 220 is also accommodated in the clip delivery drive tube 402, and is provided with a second pin hole 404. The cooperation between the pin 316 and the second pin hole 404 enables the cartridge 220 to be fixedly mounted on the knob 310. One end of the pin 316 is mounted at the first location on the side wall of the knob 310, and the other end of the pin 316 passes through the second waist-shaped hole 404448, the first pin hole 416404, the second pin hole 404, and the first waist-shaped hole 4204, and is then mounted at another location on the side wall of the knob 310 that is symmetrical to the first location, so that when the knob 310 rotates, it can drive the jaw drive tube 432, the clip delivery drive tube 402, the base 240 and the cartridge 220 to rotate together, and further drive the sleeve 210, the jaw assembly and the clip delivery assembly to rotate together, so that the doctor can adjust to a suitable angle to clamp the blood vessel or tissue. In addition, due to the presence of the first waist-shaped hole 420 404 and the second waist-shaped hole 404 448, the advancement 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. In order to increase the doctor's hand feeling when turning the knob 310 and make it stop at the current position after turning any angle, so as to facilitate the doctor's 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 part of the handle assembly. The friction between the damping member 318 and the handle assembly is used to increase the force of turning the knob 310, and make it stop at the current position after stopping at any angle. The damping member 318 is a rubber ring.

[0127] The following is a detailed description of the working process of the clip applier of this embodiment to implement clip delivery and jaw assembly closing:

[0128] The operator presses the actuator 330 to move the actuator 330 from the open position to the middle position, so as to push the switching mechanism to drive the clip delivery drive mechanism forward, and the proximal end of the clip delivery drive tube 402 and the distal end of the switching mechanism gradually approach the proximal end of the jaw drive tube 432; when the actuator 330 moves to the middle position, the moving part of the switching mechanism runs to the second guide surface 496 in the housing 321, the block 482 is disengaged from the card slot of the clip delivery drive tube 402, the switching mechanism is separated from the clip delivery drive mechanism, the forward stroke of the clip delivery drive mechanism ends, the clip at the farthest end of the clip box 220 is delivered into the jaw assembly (the clip delivery action is completed), and the distal end surface 508 of the switching mechanism abuts against the proximal end surface 502 of the jaw drive mechanism. The stop end 354 of the clip delivery stop mechanism can abut against the clip delivery drive tube 402 after the switching mechanism is separated from the clip delivery drive mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip delivery drive mechanism. The actuator 330 is continuously pressed, and the actuator 330 moves from the middle position to the closed position, and the clip delivery stop mechanism gradually disengages from the clip delivery drive tube 402; the switching mechanism pushes the jaw drive mechanism forward under the action of the actuator 330, and the jaw drive tube 432 drives the sleeve 210 forward to close the jaw assembly, until the actuator 330 is pressed to move to the closed position, the jaw drive mechanism's forward stroke ends (the jaw closing action is completed), the clip delivery stop mechanism completely disengages from the clip delivery drive tube 402, and the clip delivery drive tube 402 is reset under the action of the first reset member 418. The actuator 330 is released, and the jaw drive mechanism is reset under the action of the second reset member 446. When the actuator 330 moves from the open position to the middle position, the guide member 351 of the clamp delivery and stop mechanism moves relatively to the locking point b in the guide channel 340 of the actuator 330, thereby locking the actuator 330 in one direction, that is, the actuator 330 can only move toward the closed position under the action of external force, but cannot move toward the open position. On the one hand, the doctor can clearly know that the clamp delivery action has been completed, and on the other hand, after operating the clamp applicator to complete the clamp delivery action, there is no need to keep pressing the actuator 330. The doctor can stop to locate the blood vessel or tissue and then continue to operate the actuator 330 to perform the jaw closing action.

[0129] In this embodiment, the transmission mechanism further includes a clamp pushing drive mechanism; the transmission mechanism further includes a third state, and the transmission mechanism selectively has a first state and a third state; in the first state, the clamp feeding drive mechanism drives the farthest clamp of the clamp box 220 to move forward into the jaw assembly; in the third state, the clamp pushing drive mechanism drives the remaining clamps in the clamp box 220 to move forward one station. Here, "the farthest clamp" refers to the aforementioned "first clamp", and "the remaining clamps" refers to the aforementioned "other clamps". In this embodiment, the clamp applicator can not only apply clamps continuously, but also because the first state and the third state are at different times, the clamp feeding drive mechanism performs the clamp feeding action and the clamp pushing drive mechanism performs the clamp pushing action asynchronously, which can effectively avoid the interference problem of the clamp feeding action and the clamp pushing action. At the same time, because the clamp feeding drive mechanism and the clamp pushing drive mechanism are independent drive mechanisms, the design space is increased, and the structures of the clamp feeding drive mechanism and the clamp pushing drive mechanism are stable and reliable. Therefore, it is more stable and reliable to use the technical solution of this embodiment to perform the clamp feeding and clamp pushing actions, and the safety of the clamp applicator is improved.

[0130] In this embodiment, the transmission mechanism includes a driving member and a matching mechanism; the driving member abuts against the actuating member 330 to receive power, one part of the matching mechanism is connected to the driving member, and the other part is connected to the clamp pushing driving mechanism, and there is a distance between one part of the matching mechanism and the other part. The driving member is used to drive the clamp feeding driving mechanism to move forward to push the farthest clamp of the clamp box 220 to move forward into the jaw assembly, and is also used to drive the matching mechanism to move to drive the clamp pushing driving mechanism to retreat to store energy; the clamp pushing driving mechanism includes a third reset member, which is used to store the energy; when the energy is released, the clamp pushing driving mechanism moves forward under the action of the third reset member to move the remaining clamps in the clamp box 220 forward by one station. That is to say, when the clamp feeding driving mechanism moves forward through the matching mechanism, the clamp pushing driving mechanism retreats to store energy, and the clamp feeding action performed by the clamp feeding driving mechanism and the clamp pushing action performed by the clamp pushing driving mechanism are not synchronized. Here, the driving member is the above-mentioned switching mechanism, which is used to selectively drive the clamp feeding driving mechanism or the jaw driving mechanism. In the first state, the driving member is separated from the jaw driving mechanism, and is combined with the clip feeding driving mechanism to drive the clip feeding driving mechanism forward, and at the same time drives the matching mechanism to move to drive the clamp pushing driving mechanism backward to store the first energy; in the second state, the driving member is combined with the jaw driving assembly to drive the jaw driving mechanism forward, and is separated from the clip feeding driving mechanism, and at the same time drives the matching mechanism to move to drive the clamp pushing driving mechanism backward to store the second energy; the first energy and the second energy together constitute the above energy, and in the third state, the clamp pushing driving mechanism moves forward under the action of the energy to move the remaining clips in the clip box 220 forward by one station. That is, the clamp pushing driving mechanism is connected to the switching mechanism through the matching mechanism, and the clamp pushing driving mechanism moves in the opposite direction to the switching mechanism; under the action of the actuating member 330, the switching mechanism is first separated from the jaw driving mechanism, and is combined with the clip feeding driving mechanism to drive the clamp feeding driving mechanism forward to perform the clamp feeding action, and then separated from the clip feeding driving mechanism, and is combined with the jaw driving mechanism to drive the jaw driving mechanism forward to perform the jaw closing action. When the switching mechanism drives the clip feeding drive mechanism and the jaw driving mechanism to move forward, the matching mechanism is driven to move to drive the clamp pushing mechanism to retreat and store energy; when the actuating member 330 is released, the clamp pushing drive mechanism moves forward under the action of the third reset member to perform the clamp pushing action. How the switching mechanism realizes the combination and separation with the clip feeding drive mechanism and the jaw driving mechanism has been described above and will not be repeated here.

[0131] In another embodiment, the driving member does not contain a clutch function, and the driving member is connected to the clip delivery driving mechanism and the clip pushing driving mechanism respectively. The actuating member 330 includes a first actuating member 330 and a second actuating member 330. The first actuating member 330 abuts against the driving member, and the second actuating member 330 abuts against the jaw driving mechanism. In the first state, the driving member drives the clip delivery driving mechanism forward under the action of the first actuating member 330 to move the farthest clip of the clip box 220 forward into the jaw assembly, and drives the matching mechanism to move to drive the clip pushing driving mechanism backward to store energy; the clip pushing driving mechanism includes a third reset member, which is used to store the energy. In the third state, the first actuating member 330 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 forward by one station. After releasing the first actuating member 330, the second actuating member 330 is pressed to drive the jaw driving assembly to close the jaw assembly. Of course, before releasing the first actuator 330 and after the clamping action has been completed, the second actuator 330 can be pressed to drive the jaw drive assembly to close the jaw assembly. When the jaw assembly is closed, the first actuator 330 can be released again to allow the clamping drive mechanism to move forward under the action of the third reset member to move the remaining clamps in the clamp box 220 forward one station.

[0132] The jaw drive mechanism is sleeved on the clip delivery drive mechanism. In the first state, the proximal end surface 502 of the clip delivery drive mechanism gradually approaches the proximal end surface 502 of the jaw drive mechanism, and the distal end surface 508 of the driving member gradually approaches the proximal end surface 502 of the jaw drive mechanism; in the second state, the proximal end surface 502 of the jaw drive mechanism gradually moves away from the proximal end surface 502 of the clip delivery drive mechanism, and the distal end surface 508 of the driving member fits the proximal end surface 502 of the jaw drive mechanism. For the structure and positional relationship of the jaw drive mechanism and the clip delivery drive mechanism, please refer to the above content, which will not be repeated here.

[0133] The matching mechanism includes a first matching member, an intermediate member, and a second matching member. The first matching member is connected to the driving member, and the second matching member is connected to the push-clip driving mechanism. The first matching member drives the second matching member through the intermediate member, and the movement direction is opposite to that of the second matching member. The driving member drives the first matching member forward. When the first matching member moves forward, the second matching member moves backward to drive the push-clip driving mechanism to move backward. The structure of the matching mechanism will be described in detail below.

[0134] The push-clip driving mechanism also includes a push-clip driving member. The push-clip driving member is connected to the matching mechanism and the third reset member. Specifically, one end of the third reset member is connected to the housing 321, and the other end is connected to the proximal end of the second matching member. Of course, it can be understood that the third reset member can also be directly connected to the push-clip driving member. The push-clip driving member is connected to the distal end of the second matching member. The push-clip driving member is provided with a plurality of side cavities 252 at intervals along the longitudinal direction. Each side cavity 252 is correspondingly provided with a push-clip block 253. The push-clip driving member drives the push-clip block 253 to move the remaining clips in the clip box 220 forward by one station under the action of the third reset member. More specifically, the push-clip driving member includes a push-clip proximal end driving member and a push-clip distal end driving member. The push-clip distal end driving member herein is the aforementioned push-clip assembly or the push-clip seat 250. The third reset member can be an elastic element, such as a spring. In this embodiment, the push-clamp proximal end driving member is a matching block 452, and the push-clamp distal end driving member includes a push-clamp rod 251 and a push-clamp block 253. The proximal end of the matching block 452 is connected to the distal end of the second matching member, and the distal end of the matching block 452 is connected to the push-clamp rod 251. A plurality of side cavities 252 are arranged at equal intervals along the rod direction of the push-clamp rod 251, and each side cavity 252 is correspondingly installed with a push-clamp block 253. It can be understood that it can also be arranged at non-equal intervals. Each push-clamp block 253 is deflectably arranged in the corresponding side cavity 252 of the push-clamp rod 251 through an elastic member 254 (such as a spring). Specifically, the proximal end of the push-clamp block 253 is installed in the pin hole 404 of the upper and lower walls of the side cavity 252 through a rotating shaft 255, and the elastic member 254 is arranged in the side cavity 252, and its proximal end is connected to the proximal end of the side cavity 252, and the distal end is connected to the proximal end of the push-clamp block 253. In the initial state, the distal end of the clamping block 253 is tilted downward along the rod body of the clamping rod 251 under the action of the elastic member 254, and the distal end of each clamping block 253 abuts against the tail end of the corresponding clip in the clip box 220; when the clamping rod 251 retreats, the clamping block 253 is subjected to the upward force of the clip to flip upward around the rotating shaft 255 toward the rod body of the clamping rod 251, so that when the clamping rod 251 retreats, the clamping block 253 will not interfere with the clip. When the clamping rod 251 retreats, each clamping block 253 moves to abut against the tail of the clip adjacent to its proximal end or moves to a predetermined distance behind the clip adjacent to its proximal end. In the third state, the clamping rod 251 drives the clamping block 253 to advance. When the clamping block 253 advances, it pushes the remaining clips in the clip box 220 forward one station to prepare for the next clip delivery.

[0135] In order to make full use of the space inside the clamp and make the structure of the clamp more compact, and also to make the center of gravity of the clamp more stable and easier to operate, the proximal drive member for delivering the clamp is mounted on the proximal drive member for pushing the clamp, and the distal drive member for delivering the clamp and the distal drive member for pushing the clamp are located on both sides of the clamp box 220.

[0136] As can be seen from the foregoing, the jaw drive mechanism includes a jaw drive tube 432 and a sleeve 210 connected to the jaw drive tube 432. The jaw drive tube 432 drives the sleeve 210 to move, thereby driving the jaw assembly to move; the clip delivery drive mechanism includes a clip delivery drive tube 402 and a clip delivery assembly connected to the clip delivery drive tube 402. The clip delivery drive tube 402 drives the clip delivery assembly to move, thereby driving the farthest clip of the clip box 220 to enter the jaw assembly. In order to make the overall structure of the transmission mechanism more compact, fully utilize space, and reduce the overall volume of the clip applier, the clip delivery drive mechanism, the jaw drive mechanism, and the clip push drive mechanism are all arranged along the longitudinal direction. The projection of the clip delivery drive tube 402 on a plane perpendicular to the longitudinal direction is located within the projection of the jaw drive tube 432 on the plane, the clip delivery drive mechanism can move in the jaw drive mechanism along the longitudinal direction, and the projection of the jaw drive tube 432 on a plane perpendicular to the longitudinal direction is located within the projection of the drive member (i.e., the switching mechanism) on the plane; the projection of the clamp push proximal end drive member on the plane is located within the projection of the clip delivery drive tube 402 on the plane, the clamp push drive mechanism can move in the longitudinal direction in the clamp delivery drive mechanism, and the clamp push distal end drive member and the clip delivery assembly are located on both sides of the cartridge 220. Further, the clamp delivery proximal end drive member, the clamp push proximal end drive member, and the jaw drive tube 432 are coaxial. Specifically, the clip delivery drive tube 402 is located in the jaw drive tube 432, the proximal end of the clip push drive member is located in the clip delivery drive tube 402 and can move in the clip delivery drive tube 402, more specifically, the proximal end of the adapter block 452 is located in the clip delivery drive tube 402, and the clip push rod 251 and the clip delivery assembly are located on both sides of the clip box 220. For the structure, position, etc. of the clip box 220, please refer to the above description, which will not be repeated here.

[0137] From the above description, it can be seen that the clamp includes a knob 310, and a pin 316 is arranged inside the knob 310. One end of the pin 316 is installed at a first position on the side wall of the knob 310, and the other end passes through the proximal driving member of the jaw driving mechanism, the proximal driving member of the clamp feeding driving mechanism, the base 240, and the clamp box 220 and is then installed at another position on the side wall of the knob 310 that is symmetrical to the first position; the proximal driving member of the jaw driving mechanism is provided with a second waist-shaped hole 404448, the proximal driving member of the clamp feeding driving mechanism is provided with a first waist-shaped hole 4204, the base 240 is provided with a first pin hole 416404, and the clamp box 220 is provided with a second pin hole 404. In order to enable the push-clamp drive mechanism to rotate together with the knob 310, the proximal drive member of the push-clamp drive mechanism is provided with a third waist-shaped hole 458404 for accommodating the pin 316. One end of the pin 316 is installed at the first position on the side wall of the knob 310, and the other end passes through the first waist-shaped hole 420 404, the second waist-shaped hole 404448, the first pin hole 416404, the second pin hole 404 and the third waist-shaped hole 458404 and is then installed at another position on the side wall of the knob 310 that is symmetrical to the first position, so that the jaw drive mechanism, the clamp feeding drive mechanism, the clamp box 220 and the push-clamp drive mechanism can all rotate together with the knob 310.

[0138] The following is a detailed description of the working process of the clip applier to achieve clip delivery, jaw assembly closing, and clip pushing:

[0139] The operator presses the actuator 330 to move the actuator 330 from the open position to the middle position. The driving member (i.e., the switching mechanism) drives the clamp feeding drive mechanism forward under the action of the actuator 330, and at the same time drives the matching mechanism to drive the clamp pushing drive mechanism backward. When the clamp pushing drive mechanism retreats, its third reset member stores energy. During this process, the proximal end of the clamp feeding drive tube 402 and the distal end of the driving member gradually approach the proximal end of the jaw driving tube 432; when the actuator 330 moves to the middle position, the moving member of the driving member runs to the second guide surface 496 in the shell 321, the block 482 disengages from the card slot of the clamp feeding drive tube 402, the driving member separates from the clamp feeding drive mechanism, the forward stroke of the clamp feeding drive mechanism ends, and the clamp located at the farthest end of the clamp box 220 is sent into the jaw assembly (the clamp feeding action is completed), and the distal end surface 508 of the driving member abuts against the proximal end surface 502 of the jaw driving mechanism. The stopper end 354 of the clip delivery stopper mechanism can abut against the clip delivery drive tube 402 after the driving member is separated from the clip delivery drive mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip delivery drive mechanism. Continue to press the actuating member 330, the actuating member 330 moves from the middle position to the closed position, and the clip delivery stopper mechanism gradually separates from the clip delivery drive tube 402; the driving member pushes the jaw drive mechanism forward under the action of the actuating member 330, and at the same time continues to drive the matching mechanism to drive the clamp push drive mechanism to retreat, when the clamp push drive mechanism retreats, its third reset member continues to store energy, and the jaw drive tube 432 drives the sleeve 210 forward to close the jaw assembly, until the actuating member 330 is pressed to move to the closed position, the jaw drive mechanism ends its forward stroke (jaw closing action is completed), the third reset member ends its energy storage, the clip delivery stopper mechanism completely separates from the clip delivery drive tube 402, and the clip delivery 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. The push-clamp drive mechanism advances under the action of the third reset member to move the remaining clamps in the clamp box 220 forward by one station (the push-clamp action is completed).

[0140] The above-mentioned matching mechanism is described in detail below.

[0141] The coupling mechanism includes a first coupling part, an intermediate part and a second coupling part, wherein the first coupling part drives the second coupling part through the intermediate part; the firing drive mechanism is linked to the first coupling part; the continuous firing drive mechanism is linked to the second coupling part; the movement direction of the first coupling part is opposite to the movement direction of the second coupling part, wherein the firing drive mechanism includes the above-mentioned clamp delivery drive mechanism and the jaw drive mechanism, which are used to complete the clamp delivery action and the clamping action (jaw closing action), and the continuous firing drive mechanism is the above-mentioned clamp pushing drive mechanism, which is used to complete the clamp pushing action. The linkage here refers to the connection of two moving parts, the two have the same movement direction, and move synchronously. The clamp delivery drive mechanism and the clamp pushing drive mechanism are independent drive mechanisms, which increase the design space and can realize more reliable and stable execution of the clamp delivery and clamp pushing actions. The clamp pushing action is asynchronous with the clamp delivery action and the clamping action through the coupling mechanism, which effectively avoids the interference problem of the clamp delivery action and the clamp pushing action, thereby effectively improving the safety and reliability of the clamp applying forceps.

[0142] The firing drive mechanism is linked to the first connecting member through a switching mechanism, and the switching mechanism is used to selectively drive the clamp feeding drive mechanism and the jaw driving mechanism; specifically, the proximal end of the switching mechanism is fixedly connected to the first connecting member, and the switching mechanism is detachably connected to the firing drive mechanism. When the above-mentioned actuator 330 is pressed, the switching mechanism, under the action of the actuator 330, first drives the clamp feeding drive mechanism forward to perform the clamp feeding action and then drives the jaw driving mechanism forward to perform the clamping action, and at the same time drives the first connecting member forward, and then drives the continuous firing drive mechanism backward to store energy; the continuous firing drive mechanism includes a third reset member, which is used to store the energy; the actuator 330 is released, and the continuous firing drive mechanism moves forward under the action of the third reset member to perform the clamping action. The structure, positional relationship, connection relationship, etc. of the switching mechanism, the clamp feeding drive mechanism, the jaw driving mechanism, and the clamping pushing drive mechanism are the same as those described above, and will not be repeated here.

[0143] The first matching part includes an upper rack 462, the second matching part includes a lower rack 468, and the middle part includes a first gear 464 and a second gear 466; the upper rack 462 meshes with the first gear 464, the lower rack 468 meshes with the second gear 466, the first gear 464 and the second gear 466 are coaxially arranged, and the diameter of the first gear 464 is greater than the diameter of the second gear 466, that is, the firing drive mechanism is connected to the upper rack 462 through the switching mechanism, and the continuous firing drive mechanism is connected to the lower rack 468, and the movement directions of the upper rack 462 and the lower rack 468 are opposite, when the upper rack 462 moves a first distance in the first direction, the lower rack 468 moves a second distance in the direction opposite to the first direction, that is, when the firing drive mechanism moves a first distance in the first direction, the continuous firing drive mechanism moves a second distance in the second direction opposite to the first direction, and the first distance is greater than the second distance. Among them, the first direction is the forward direction of the clamp feeding drive mechanism and the jaw drive mechanism. During the process of the firing drive mechanism moving forward a first distance, it needs to complete the clamp delivery action and the clamp application action, and the continuous firing drive mechanism accumulates energy during the process of retreating a second distance, and then moves forward to complete the clamp pushing action after releasing the actuator 330. The retreat distance is equal to the forward distance, and the forward distance is equal to the distance that the clamp in the clamp box 220 moves forward one station. The second retreat distance is smaller than the first distance of the firing drive mechanism, and the clamp in the clamp box 220 can be arranged as closely as possible, that is, the clamp box 220 can accommodate more clamps, and the number of consecutive clamp applications is increased to meet the doctor's surgical needs.

[0144] In order to make the layout of the matching mechanism more reasonable and the structure more compact, the first matching component and the second matching component are arranged along the longitudinal direction, and the intermediate component is arranged between the first matching component and the second matching component and arranged along a direction perpendicular to the longitudinal direction.

[0145] 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 delivery drive mechanism. The axis of the first adapter is perpendicular to the axis of the middle piece and parallel to the axis of the second adapter; the axis of the second adapter is coaxial with the axis of the proximal drive member (adaptation block 452) of the continuous firing drive mechanism and the axis of the proximal drive member (clip delivery 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 not shake and more stable, the housing 321 is provided with a first guide groove 472 and a second guide groove 474, the first adapter moves in the first guide groove 472, and the second adapter moves in the second guide groove 474.

[0146] As can be seen from the above, the continuous firing drive mechanism includes a push-clip drive member and a third reset member, and the push-clip drive member is connected to the distal end of the second matching member; the push-clip drive member is provided with a plurality of side cavities 252 at intervals along the longitudinal direction, and each side cavity 252 is correspondingly provided with a push-clip block 253, and the push-clip drive member moves under the action of the third reset member so that the push-clip block 253 moves to perform the push-clip action. The third reset member stores energy when the continuous firing drive mechanism retreats, and in order to make the overall structure more compact and make full use of the space, the third reset member of the continuous firing drive mechanism is located in the second guide groove 474, one end of which is connected to the proximal end of the second matching member, and the other end is connected to the housing 321 located at the proximal end of the second guide groove 474.

[0147] In order to prevent the second connecting component connected to the continuous firing drive mechanism from rotating when the knob 310 rotates, the distal end of the second connecting component has a accommodating space. In order to facilitate installation, the accommodating space has an opening, and the proximal end of the push-clamp drive component is received in the accommodating space through the opening and can rotate in the accommodating space; the proximal end of the push-clamp drive component has a stop portion 506, which abuts against the limiting surface 470 in the accommodating space, so that the continuous firing drive mechanism and the distal end of the second connecting component are axially fixed.

[0148] The following is a detailed description of the working process of the transmission mechanism of the clamping pliers to perform the clamping action, clamping action, and clamping pushing action in combination with the matching mechanism:

[0149] The operator presses the actuator 330 to move the actuator 330 from the open position to the middle position. Under the action of the actuator 330, the switching mechanism drives the clamp feeding drive mechanism and the first connecting member forward. At the same time, the first connecting member drives the second connecting member backward through the middle member. Since the second connecting member is connected to the clamp pushing drive mechanism, the clamp pushing drive mechanism is driven backward. When the clamp pushing drive mechanism retreats, its third reset member 456 stores energy. During this process, the proximal end of the clamp feeding drive tube 402 and the distal end of the switching mechanism gradually approach the proximal end of the jaw driving tube 432. When the actuator 330 moves to the middle position, the moving part of the switching mechanism runs to the second guide surface 496 in the shell 321, and the block 482 of the switching mechanism disengages from the slot of the clamp feeding drive tube 402. The switching mechanism is separated from the clamp feeding drive mechanism, and the forward stroke of the clamp feeding drive mechanism ends (the clamp feeding action is completed). The stopper end 354 of the clip delivery stopper mechanism can abut against the clip delivery drive tube 402 after the switching mechanism is separated from the clip delivery drive mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip delivery drive mechanism. Continue to press the actuator 330, the actuator 330 moves from the middle position to the closed position, and the clip delivery stopper mechanism gradually separates from the clip delivery drive tube 402; the switching mechanism continues to push the jaw drive mechanism and the first adapter forward under the action of the actuator 330, and at the same time, the first adapter continues to drive the second adapter backward through the intermediate member. Since the second adapter is connected to the clamp pushing drive mechanism, the clamp pushing drive mechanism continues to retreat. When the clamp pushing drive mechanism retreats, its third reset member 456 continues to store energy, the jaw drive tube 432 drives the sleeve 210 forward to close the jaw assembly (the clamping action is completed), and the third reset member 456 finishes storing energy, the clip delivery stopper mechanism completely separates from the clamp delivery drive tube 402, and the clamp delivery 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 , and the push-clamp drive mechanism advances under the action of its third reset member 456 to move the remaining clamps in the clamp box 220 forward by one station (the push-clamp action is completed).

[0150] In this embodiment, the clip delivery drive mechanism is used to drive the farthest clip of the clip box 220 to move forward into the jaw assembly, and the clip pushing drive mechanism is used to drive the remaining clips in the clip box 220 to move forward one station; the clip delivery drive mechanism includes a clip delivery proximal drive member and a clip delivery distal drive member connected to the clip delivery proximal drive member, and the clip pushing drive mechanism includes a clip pushing proximal drive member and a clip pushing distal drive member connected to the clip pushing proximal drive member; the motion trajectory of the clip delivery proximal drive member is parallel to the motion trajectory of the clip pushing proximal drive member, and the motion trajectory of the clip delivery distal drive member intersects with the motion trajectory of the clip pushing distal drive member. Different drive mechanisms are used to respectively perform the clip delivery action and the clip pushing action, which increases the design space, can realize more reliable and stable execution of the clip delivery action and the clip pushing action, and the clip delivery action is executed earlier than the clip pushing action, and the two actions are not synchronized and will not interfere with each other, thereby effectively improving the safety and reliability of the clamp applicator.

[0151] It should be noted that in this implementation,

[0152] The motion trajectory refers to the motion trajectory formed during the motion of each point on the component. When the motion trajectory of component A and the motion trajectory of component B are both straight lines, if at least one straight line in the motion trajectory of component A is collinear with at least one straight line in the motion trajectory of component B, then the motion trajectory of component A and the motion trajectory of component B are said to be "coaxial"; if all the straight lines in the motion trajectory of component A are parallel to all the straight lines in the motion trajectory of component B, then the motion trajectory of component A and the motion trajectory of component B are said to be "parallel". The motion trajectory of a component refers to the motion trajectory formed within one execution cycle.

[0153] In this embodiment, the proximal driving member for pushing the clip is partially movably located in the proximal driving member for delivering the clip, and the distal driving member for delivering the clip and the distal driving member for pushing the clip are located on both sides of the clip box 220. Specifically, the distal driving member for pushing the clip is located on the side of the clip box 220 that accommodates the clip (the inside of the clip box 220), and the distal driving member for delivering the clip is located on the side of the clip box 220 that does not accommodate the clip (the outside of the clip box 220). As can be seen from the foregoing, the proximal driving member for delivering the clip moves forward in the longitudinal direction, and drives the distal driving member for delivering the clip to move from the outside of the clip box 220 to the plane where the clip is located and abuts against the clip at the farthest end of the clip box 220, thereby pushing the clip forward to the jaw assembly. When the clip delivery driving mechanism retreats, the proximal driving member for delivering the clip drives the distal driving member for delivering the clip to return to the initial position along the original path. The push-clip proximal end driving member retreats in the longitudinal direction and drives the push-clip distal end driving member to retreat. When the push-clip distal end driving member retreats, its distal end moves from the position abutting against the corresponding clip on the inner side of the clip box 220 to the rear of the clip adjacent to its proximal end away from the bottom wall 221 of the clip box 220. When the push-clip proximal end driving member advances in the longitudinal direction, it drives the push-clip distal end driving member to advance to push the remaining clips in the clip box 220 forward one station. Therefore, during the movement of the transmission mechanism, the motion trajectory of the clip delivery distal end driving member intersects with the motion trajectory of the push-clip distal end driving member, wherein the intersection of the component motion trajectories includes the intersection of the component motion trajectories themselves and also includes the intersection of the extended lines of the component motion trajectories. The motion trajectory of the clip delivery proximal end driving member is parallel to the motion trajectory of the push-clip proximal end driving member.

[0154] In this embodiment, the proximal drive member for delivering the clamp is sleeved on the proximal drive member for pushing the clamp, so that the structure of the transmission mechanism is more compact and the space is fully utilized. The clamp delivering drive mechanism and the clamp pushing drive mechanism can move in the jaw drive mechanism. The jaw drive mechanism moves forward or backward in the longitudinal direction, and its motion trajectory is parallel to the motion trajectory of the proximal drive member for delivering the clamp or the motion trajectory of the proximal drive member for pushing the clamp, and intersects with the motion trajectory of the distal drive member for delivering the clamp or the motion trajectory of the distal drive member for pushing the clamp. The jaw drive mechanism includes a jaw drive tube 432 and a sleeve 210 connected thereto, the jaw drive tube 432 drives the sleeve 210 to move so that the jaw assembly is closed, and the motion trajectory of the jaw drive tube 432 and the motion trajectory of the sleeve 210 together constitute the motion trajectory of the jaw drive mechanism. Such a design makes the layout of the transmission mechanism reasonable and the structure compact.

[0155] The proximal end driving member for clip delivery includes a clip delivery driving tube 402, and the distal end driving member for clip delivery includes a clip delivery block 231; the clip delivery block 231 is used to drive the clip to be delivered into the jaw assembly; the proximal end driving member for pushing the clip includes a matching block 452, and the distal end driving member for pushing the clip includes a clip pushing block 253, and the clip pushing block 253 is used to drive the remaining clips in the clip box 220 to move forward one station; the movement trajectory of the clip delivery driving tube 402 is parallel to the movement trajectory of the matching block 452 and the movement trajectory of the jaw drive mechanism, and the movement trajectory of the clip delivery block 231 intersects with the movement trajectory of the clip pushing block 253 and the movement trajectory of the jaw drive mechanism. In order to make the overall structure more compact, the matching block 452 is partially located in the clip delivery driving tube 402 and can move in the longitudinal direction in the clip delivery driving tube 402, and the proximal end of the clip delivery driving tube 402 is located in the jaw drive tube 432 and can move in the longitudinal direction in the jaw drive tube 432.

[0156] The clamp delivery block 231 is connected to the clamp delivery drive tube 402 through the clamp delivery rod 233; the clamp delivery drive mechanism also includes a base 240 fixed to the housing 321, and the base 240 is slidably matched with the clamp delivery rod 233; the base 240 is provided with a guide slope 498243 at the far end, which is used to guide the clamp delivery block 231 to be pushed out from the base 240 to drive the farthest clamp of the clamp box 220; the movement trajectory of the clamp delivery rod 233 is parallel to the movement trajectory of the jaw drive mechanism. The clamp push block 253 is connected to the matching block 452 through the clamp push rod 251, and a plurality of side cavities 252 are provided along the rod direction of the clamp push rod 251, and each side cavity 252 is correspondingly installed with a clamp push block 253; the movement trajectory of the clamp push rod 251 is parallel to the movement trajectory of the jaw drive mechanism. Such a design makes the layout of the whole machine reasonable and the space is fully utilized.

[0157] The following is a detailed description of the movement trajectory of the clamping block 231 and the movement trajectory of the clamping block 253. Fig.23A and Fig. 23B, is a schematic diagram of the movement process and movement trajectory of the clamp delivery block 231 when the clamp delivery driving mechanism moves forward; as mentioned above, it can be seen that the clamp delivery block 231 moves from the first plane where the base 240 is located to the guide slope 498243 at the far end of the base 240, and then moves along the guide slope 498243 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 shown in FIG. Fig.23A As shown, from which we can derive the motion trajectory diagram formed by any point on it as follows Fig. 23B As shown. Fig.24A and Fig. 24B As shown in the figure, it is a schematic diagram of the movement process and movement trajectory of the clamping block 253 when the clamping driving mechanism retreats. As can be seen from the above, the clamping block 253 retreats with the clamping driving mechanism. When it retreats to the clamp adjacent to its proximal end, the distal end of the clamping block 253 is subjected to the upward force of the clamp to flip upward around the rotating shaft 255. When the distal end of the clamping block 253 continues to retreat, when it reaches the rear of the clamp adjacent to its proximal end, the distal end of the clamping block 253 flips downward to the original position under the action of the spring. The movement process is shown in FIG. Fig.24A As shown, the motion trajectory of the push clamp block 253 can be obtained. Taking the distal end point E of the push clamp block 253 as an example, the motion trajectory diagram formed is as shown in FIG. 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 block 253.

[0158] 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 driving mechanism; one part of the matching mechanism is connected to the switching mechanism, and the other part is connected to the clamp pushing drive mechanism, and there is a distance between the one part and the other part; the switching mechanism drives the clip feeding drive mechanism and the jaw driving mechanism to move in a first direction in succession under the action of the actuator 330, and drives the matching mechanism to move 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 the energy. The actuator 330 is released, and the clamp pushing drive mechanism moves forward under the action of the third reset member 456 to move the remaining clips in the clip box 220 forward by one station; the motion trajectory of the switching mechanism is coaxial with the motion trajectory of the jaw driving mechanism, so that the space is fully utilized and the structure is more compact. The matching mechanism includes a first matching part and a second matching part driven by the first matching part, the first matching part is connected to the switching mechanism, and the second matching part is connected to the clamping driving mechanism; the motion track of the first matching part is parallel to the motion track of the jaw driving mechanism, and the motion track of the second matching part is parallel to the motion track of the jaw driving mechanism. In this way, the structure of the overall transmission mechanism is more compact and the space is fully utilized.

[0159] In this embodiment, Figures 25 to 33D As shown, the clip applier also has a structural design for achieving a special position locking of the wrench, the specific details of which are as follows.

[0160] In this embodiment, the wrench can be movably connected to the shell 321 of the main body 320, and the wrench can be in three special positions: at the initial moment, the user does not operate the wrench, and the position of the wrench is the open position; the user operates the wrench, and the position of the wrench is the middle position when the clamp delivery is completed; the user operates the wrench, and the position of the wrench is the closed position when the clamp application is completed, and 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 middle position and then to the closed position. The movement of the wrench toward the closed position is defined as the positive movement of the wrench, and the movement of the wrench from the open position to the middle position and the movement of the wrench from the middle position to the closed position are both positive movements; correspondingly, the movement of the wrench toward the open position is defined as the reset movement of the wrench. Similarly, the movement of the wrench from the closed position to the middle position and the movement of the wrench from the middle position to the open position are both reset movements. The wrench is defined as moving from the open position to the middle position as the first forward movement of the wrench, moving from the middle position to the closed position as the second forward movement of the wrench, moving from the closed position to the middle position as the second reset movement of the wrench, and moving from the middle position to the open position as the first reset movement of the wrench. The user operates the wrench to make a forward movement, and in response to the user's operation, the wrench moves from the open position to the middle position and then to the closed position.

[0161] According to the above, at least part of the clip delivery drive mechanism and at least part of the jaw drive mechanism are accommodated in the housing 321, such as the clip delivery proximal drive member and the jaw proximal drive member mentioned above, and the clip delivery drive mechanism and the jaw drive mechanism are connected to the wrench and driven by the wrench to move forward. The clip delivery drive mechanism drives the clip to move forward and enter the jaw assembly in response to the wrench moving from the open position to the middle position. When the wrench is located at the middle position, the clip is in the ready position, that is, the first section of the forward movement of the wrench drives the clip delivery action and realizes the delivery of the clip into place. The ready position is a position where the first clip is stably clamped by the jaw assembly and can be effectively compressed to a closed state. If the clip slides in the jaw assembly so that it is not in the ready position, it will cause insufficient support for the clip during the clamping process, 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 wrench moving from the middle position to the closed position, thereby driving the jaw assembly to close. When the wrench is in the closed position, the jaw assembly is in a closed state, that is, the second section of the positive motion of the wrench drives the closing action and realizes the jaw closure to the bottom and clamping in place. Clamping in place means that the clamp in the jaw assembly is compressed to a closed state.

[0162] The clamp applicator of this embodiment is a clamp applicator that can continuously apply multiple clamps. In order to achieve continuous clamping, the wrench needs to be reset to the open position to prepare for the next clamp application. If the user still has to operate the reset, it is troublesome, resulting in a poor user experience. In this embodiment, the clamp applicator also includes a wrench reset mechanism, which is connected to the wrench. When the user stops operating the wrench, the wrench reset mechanism drives the wrench to perform a reset movement, and the direction of the reset movement is opposite to the direction of the forward movement. The wrench reset mechanism includes an elastic element. When the wrench moves forward, the elastic element is compressed and deformed to store energy. When the wrench is not operated, the elastic element restores its shape under the action of the accumulated energy, providing a reset force to make the wrench perform a reset movement. In this embodiment, the wrench reset mechanism is the third reset member 456 of the push-clip drive mechanism. The connection between the third reset member 456 and the wrench is as described above. When the wrench is released, the reset movement of the third reset member 456 itself drives the input member to move backward through the matching structure described above, so that the driving surface 504 of the input member pushes the wrench to perform a reset movement. In another embodiment, the wrench resetting mechanism includes, in addition to the third resetting member 456, a second resetting member 446 of the jaw driving mechanism. During the movement of the wrench from the closed position to the middle position, in addition to the third resetting member 456 providing a resetting force to the handle, the second resetting member 446 also provides a resetting force to the handle. Specifically, during the movement of the wrench from the closed position to the middle position, the jaw driving tube 432 always maintains contact with the input member, and the second resetting member 446 drives the jaw driving tube 432 to retreat during its own resetting movement, and the jaw driving tube 432 pushes the input member to retreat, so that the driving surface 504 of the input member pushes the wrench to perform a resetting movement until the jaw driving tube 432 returns to the initial position and disengages from the input member, and from this moment on, the third resetting mechanism will provide the resetting force to the wrench alone.

[0163] The doctor operates the wrench to move forward to sequentially perform the clip delivery and clip application. If there is no obvious pause or boundary between the clip delivery and clip application actions, the doctor will have a poor experience. The clip applicator of this embodiment also includes a wrench locking mechanism, which includes a guide member 351 and a guide channel 340 arranged 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 part of the guide member 351 is accommodated in the guide channel 340, and the guide member 351 moves relative to the guide channel 340; the guide member 351 moves relatively from the starting point a to the locking point b in response to the wrench moving from the open position to the middle position, and the guide member 351 moves relatively from the locking point b to the end point in response to the wrench moving from the middle position to the closed position. During the period when the user operates the wrench to make a forward movement, if the wrench is in the middle position when the wrench is not operated, the guide member 351 prevents the wrench from resetting 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, which is also called the movement of the guide member 351 relative to the guide channel 340 or the relative movement of the guide member 351. The guide channel 340 is a closed channel provided on the wrench, and the guide member 351 cannot be separated from the guide channel 340, and thus cannot be separated from the wrench. Therefore, the locking point b of the wrench locking mechanism can provide a pause point for the clamping and clamping actions, and 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.

[0164] Furthermore, in the guide channel 340, the guide member 351 prevents the wrench from resetting only when the guide member 351 is located at the locking point b. That is, the guide channel 340 only provides a locking point b that prevents the wrench from resetting. When the wrench moves forward, when the operation of the wrench stops, if the wrench is at any position other than the open position and the middle position, the wrench resetting mechanism drives the wrench to resetting. In this way, during the operation of the wrench, the wrench is locked only at the middle position to remind the completion of the clamping, and is not disturbed by other positions, thereby improving the user experience.

[0165] Furthermore, before the wrench reaches the closed position, it moves forward between the intermediate position and the closed position. When the wrench is stopped, the wrench reset mechanism drives the wrench to reset to the intermediate position. The guide member 351 moves to the locking point b in response to the reset movement of the wrench to the intermediate position, and the guide member 351 prevents the wrench from continuing to reset at the locking point b. In this way, the only one locking point provided by the guide channel 340 to prevent the wrench from resetting is further fully utilized. If the wrench is stopped during the clamping process, the wrench will stop at the intermediate position where the clamp is delivered, instead of being directly reset to the open position, so as to avoid the user operating the wrench beyond the intermediate position and being unable to know the completion of the clamp delivery, and provide the user with the opportunity to observe the surgical situation and adjust the clamping position of the jaw assembly before the clamp delivery is completed, thereby improving the user experience.

[0166] Furthermore, when the wrench reset mechanism drives the wrench to reset to the middle position, it also drives the jaw drive mechanism to move backward, thereby driving the jaw assembly to open. Regardless of whether the wrench reaches the closed position before or after, if the second reset movement occurs, the jaw drive mechanism will be driven to move backward and the jaw assembly will open. In particular, the clamping forceps has begun clamping but has not completed the clamping, the wrench has not reached the closed position, the jaw assembly has not been closed to the bottom, and the clamp has not been compressed to the closed state. At this time, if the wrench is released, the clamping process can be abandoned, the jaw assembly returns to the fully open state, and the clamp returns to the open state. The subsequent adjustment of the position of the jaw assembly on the tissue will not damage the tissue. Such a design is safer and more humane.

[0167] The guide channel 340 is a closed groove. A closed groove is a groove surrounded on all sides. The guide member 351 is restricted from moving in all directions in the groove and cannot leave the groove. Therefore, in this embodiment, the guide member 351 cannot be separated from the wrench. The closed groove provides a fixed moving channel for the guide member 351, and the movement stability is strong, which also makes the locking stability of the guide member 351 and the guide channel 340 at the locking point b good. In this embodiment, specifically as Fig.25 As shown, the closed groove is a closed groove that penetrates the main body 320 of the wrench, and the radial direction is perpendicular to the axial direction. In other embodiments, the guide channel 340 can also be a closed groove that does not penetrate the main body 331320 of the wrench, and only a closed channel for the guide member 351 to move therein is provided.

[0168] In this embodiment, Fig.25As shown, the wrench includes a wrench body 331320, a user-operated pressing portion 332 arranged at one end of the wrench body 331320, and a pushing portion 333 arranged at the other end of the trigger body 320, and the pushing portion 333 abuts against and pushes the clamp feeding drive mechanism or the jaw drive mechanism to move. The wrench body 331320 is provided with a pivot end 334 pivotally connected to the housing 321 of the main body 320 of the operating assembly 300. The guide channel 340 is located in the wrench body 331320 and is located between the pivot end 334 and the pushing portion 333. As a result, the guide channel 340 is in the middle position of the wrench, further improving the stability of the movement of the guide member 351, and there is no need to design an additional structure to set the guide channel 340, and the structure of the wrench locking mechanism is compact.

[0169] In this embodiment, Fig.26 As shown, the guide channel 340 includes a main channel 341 and only one slave channel 343 extending from an opening portion 342 of the main channel 341, the opening portion 342 is located between 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 end point, and a locking point b is provided at the end of the slave channel 343 away from the opening portion 342; the wrench body 331320 also includes a wrench locking elastic element 355, the wrench locking elastic element 355 applies a force to the guide member 351 to separate from the main channel 341 and enter the slave channel 343, so that the wrench locking elastic element 355 drives the guide member 351 to separate from the main channel 341 and enter the slave channel 343. With such a structure, the guide channel 340 only provides a locking point to prevent the wrench from resetting. If the wrench is released before reaching the first section of the forward movement of the wrench at the middle position, the wrench will reset to the open position and stop. When the wrench leaves the middle position and continues to move forward, if the wrench is released before reaching the closed position, the wrench will reset to the middle position and be locked in the middle position by the locking point b of the wrench locking mechanism, and cannot continue to reset. Therefore, when the wrench is released from the time of completing the clip delivery action to before completing the clip application action, the user will be able to clearly feel the pause of the wrench at the middle position. This pause is unique and undisturbed, informing the user that the clip delivery has been completed but the clip application has not been completed. The user can also adjust the position of the clip application pliers, and the user experience is good.

[0170] The slave channel 343 includes a blocking wall 344. When the wrench is not operated and the guide member 351 is located at the locking point b, the guide member 351 abuts against the blocking wall 344 in the reset movement direction of the wrench, thereby preventing the wrench from performing reset movement at the locking point b. That is, the blocking wall 344 prevents the guide member 351 at the locking point b from moving toward the starting point a. The simple channel wall structural design of the slave channel 343 is adopted to achieve locking at the locking point b, without the need for additional locking elements, and the structure is simple and compact.

[0171] The main channel 341 includes a first wall extending from the starting point a to the first wall connected to the blocking wall 344, and the first wall and the blocking wall 344 are at a right angle or an acute angle. The simple angle design of the guide channel can ensure that the blocking wall 344 effectively prevents the guide member 351 from escaping from the locking point b of the slave channel 343, and when the guide member 351 enters the slave channel 343 from the main channel 341 in the forward movement, it will make a collision sound when passing through the right angle point or the acute angle point, and the sound clearly reminds the user that the wrench has reached the middle position and reminds the user to deliver the clamp in place at this moment.

[0172] The slave channel 343 further includes a guide wall 345 connected to the blocking wall 344, and the guide wall 345 guides the guide member 351 to move bidirectionally between the locking point b and the end point. The slave channel 343 adopts a simple channel wall structural design, that is, bidirectional movement is achieved between the locking point b and the end point, the wrench will not be locked in both directions, and can be smoothly operated by the user to the closed position or reset to the middle position, without the need for additional guiding elements, and the structure is simple and compact.

[0173] The main channel 341 also includes a second wall extending from the end point to connect with the guide wall 345, and the second wall forms an obtuse angle with the guide wall 345. Such a simple angle design of the guide channel further ensures that bidirectional movement is achieved between the locking point b and the end point, and the wrench will not be locked in both directions.

[0174] Specifically, Fig.25As shown, the main channel 341 is an arc channel with the pivot end 334 of the wrench as the center, and the slave channel 343 extends from the opening 342 of the main channel 341 in the direction away from the pivot end 334, that is, the distance between the slave channel 343 and the pivot end 334 is greater than the distance between the main channel 341 and the pivot end 334. The distance between the guide member 351 located in the main channel 341 and the pivot end 334 is defined as X. Since the main channel 341 is the above-mentioned arc channel, the distance X remains unchanged when the guide member 351 moves in the main channel 341 (including at the starting point a and the end point). The distance between the guide member 351 and the pivot end 334 when it is located in the slave channel 343 is defined as Y. When the guide member 351 enters the slave channel 343 and moves toward the locking point b, Y increases continuously, and Y is always greater than X. In particular, the distance Y0 when the guide member 351 is located at the locking point b is the maximum value. It can be seen from the above that when the wrench moves and the guide member 351 only moves relatively in the main channel 341, in fact, the guide member 351 does not move relative to the housing 321. In the present application, the guide channel 340 is not limited to the above shape. In other embodiments, for example, the main channel 341 is an arc-shaped channel, and the distances between the two ends of the arc-shaped channel and the pivot end 334 are different, but the above X of the arc-shaped channel is still smaller than Y, and the above wrench locking function is also achieved. The guide channel 340 structure that can ensure the cooperation with the slave channel 343 to achieve the locking point b is easily thought of by those skilled in the art, and all are within the protection scope of the present application.

[0175] In this embodiment, in order to enable the "wrench locking elastic element 355 to drive the guide member 351 to disengage from the main channel 341 and enter the slave channel 343", the wrench locking mechanism also includes a guide pivot member 350, which is accommodated in the shell 321. The guide pivot member 350 includes a pivot end 352 pivoted to the shell 321, a force-bearing end 353 extending from the pivot end 352 and the above-mentioned guide member 351, one end of the wrench locking elastic element 355 abuts against the force-bearing end 353, and the other end abuts against the shell 321. When the elastic force of the wrench locking elastic element 355 acts on the force-bearing end 353, it drives the guide pivot 350 to rotate with the pivot end 352 as the rotation center, and also drives the guide member 351 to rotate with the pivot end 352 as the rotation center. In this way, the guide pivot 350 limits the arc-shaped motion trajectory of the guide member 351, ensuring that it can stably switch back and forth between the main channel 341 and the slave channel 343, further ensuring the stability of the wrench locking mechanism.

[0176] Specifically, Fig. 27As shown, in this embodiment, the guide pivot member 350 includes a first pivot arm 526 and a second pivot arm 526 respectively extending from the pivot end 352, the end of the first pivot arm 526 is a force-bearing end 353, the guide member 351 is arranged at the end of the second pivot arm 526, one end of the wrench locking elastic element 355 is connected to the force-bearing end 353, and the other end of the wrench locking elastic element 355 is connected to the shell 321. The first rotating arm 526 and the second rotating arm 526 form a lever with the pin shaft of the pivot end 352 as the fulcrum. The wrench locking elastic element 355 and the guide member 351 are located at both ends of the lever. Such a structure is stable. 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. Therefore, 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 526 and the second rotating arm 526 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 350 - a lever. The structure of the guide pivot 350 is not limited thereto. For example, in other embodiments, a first rotating arm 526 extends from the pivot end 352 of the guide pivot 350, and the guide 351 is disposed at the end of the first rotating arm 526. The middle point of the first rotating arm 526 is the force-bearing end 353 connected to the wrench locking elastic element 355. This method can also realize that the wrench locking elastic element 355 applies a force to the guide 351 through the guide pivot 350 to separate from the main channel 341 and enter the slave channel 343, all of which are within the protection scope of the present invention.

[0177] In the above manner, the wrench locking elastic element 355 is indirectly connected to the guide member 351 through the guide pivot member 350. In other embodiments, the wrench locking elastic element 355 can be directly connected to the guide member 351 to achieve "the wrench locking elastic element 355 drives the guide member 351 to leave the main channel 341 and enter the slave channel 343". In one embodiment, a "V"-shaped rod can be used as the wrench locking elastic element 355, one end of the V-shaped rod is fixedly connected to the shell 321, and the other end is provided with the above-mentioned guide member 351. The "V"-shaped rod is made of rigid material, and the V-shaped bend of the "V"-shaped rod is relatively small. , thereby providing the guide member 351 with a "force to break away from the main channel 341 and enter the slave channel 343", but such a rigid "V"-shaped rod is easy to wear and break; in another embodiment, an elastic material that can undergo a large deformation is used to form the wrench locking elastic element 355, and the wrench locking elastic element 355 is, for example, a "V" metal spring 522 or a spring, one end of which is fixedly connected to the housing 321, and the other end is provided with a guide member 351. Due to the large elasticity of the locking elastic element, the guide member 351 connected thereto has poor stability in moving in the channel, and cannot well realize the function of locking the wrench in the middle position. In summary, it can be seen that the indirect connection between the wrench locking elastic element 355 and the guide member 351 and the application of the above-mentioned force to enter the slave channel 343 through the guide pivot member 350 adopted in this embodiment, in addition to the above-mentioned benefits, also has the following benefits: it is not easy to have the problem of parts damage or breakage, the stability of the movement of the guide member 351 is guaranteed, and the stability of the wrench locking mechanism is further guaranteed. Preferably, in this embodiment, the wrench locking elastic element 355 is a spring.

[0178] The guide pivot member 350 also includes a stop end 354 extending from the pivot end 352. Before the wrench moves from the open position to the middle position, the stop end 354 remains disengaged from the clamp delivery drive mechanism; before the wrench moves from the middle position to the closed position, the stop end 354 remains in contact with the clamp delivery drive mechanism to prevent the clamp delivery drive mechanism from retreating.

[0179] Specifically, Fig. 27As shown, in this embodiment, the guide pivot member 350 extends from the pivot end 352 to form a third pivot arm 526 , and the end of the third pivot arm 526 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 clamp is not in use, the wrench is in the open position, the guide pivot 350 is located below the clamp feeding drive mechanism, and the stop end 354 has no contact with the clamp feeding drive mechanism; when the wrench moves forward and the guide member 351 moves toward the opening 342 in the main channel 341, the clamp feeding drive mechanism moves forward, and the stop end 354 still has no contact with the clamp feeding drive mechanism; when the guide member 351 enters the slave channel 343 and moves toward the locking point b, the distance between the stop end 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 member 351 withdraws from the slave channel 343 along the guide wall 345 and returns to the main channel 341, the jaw drive mechanism is clamping, and the stop end 354 always maintains contact 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 Figure 25-26 As shown, the slave channel 343 extends from the opening portion 342 of the main channel 341 toward a 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.

[0180] 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 moves back 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 motion of the guide member 351. The motion path is the path formed by the channel reached during the motion. When the wrench reaches the closed position, the user releases the wrench, and the wrench moves back to the open position under the action of the wrench reset mechanism. During this period, no stop is required. The second motion path shields the slave channel 343 to prevent 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 motion, is prevented from playing a reverse role in the reset motion, thereby achieving the one-step reset of the wrench.

[0181] Further, if Figure 29-33DAs shown, in order to achieve the above-mentioned shielding of the slave channel 343, the clamping forceps also include a path switching member 360 for switching the first movement path and the second movement path. The path switching member 360 is located in the housing 321, and the path switching member 360 has two states. When the path switching member 360 is in the first state, the path switching member 360 makes way for the slave channel 343 to allow the guide member 351 to enter or exit the slave channel 343. When the path switching member 360 is in the second state, the path switching member 360 blocks the guide member 351 from entering the slave channel 343. The guide member 351 is a cylinder extending radially and passing through the guide channel 340. The guide member 351 includes a first part and a second part that are connected. The first part of the guide member 351 is accommodated in the guide channel 340, and the second part is outside the guide channel 340 and protrudes from the surface of the wrench body 331320. When the first part of the guide member 351 moves in the guide channel 340, the second part will correspondingly form an activity space with the movement of the first part. When the path switching member 360 blocks the first part of the guide member 351 from entering the space through the slave channel 343 from the opening 342, the guide member 351 can be prevented from entering the slave channel 343, and there is no need to block the entire slave channel 343. When the path switching member 360 blocks the second part of the guide member 351 from entering the above-mentioned activity space or entering the above-mentioned activity path, the first part of the guide member 351 is prevented from entering the slave channel 343, that is, the guide member 351 can also be prevented from entering the slave channel 343.

[0182] The guide member 351 enters and exits the slave channel 343 from the opening portion 342 of the main channel 341. The opening portion 342 includes a starting point 342a and an ending point b. The starting point 342a and the ending point b are between the entrance and exit of the slave channel 343. The starting point 342a is close to the starting point a of the main channel 341, and the ending point b is close to the end point of the main channel 341. In one embodiment, when the wrench moves forward and the guide member 351 is located at the starting point 342a of the opening portion 342 of the main channel 341, the path switching member 360 is in the first state, and the guide member 351 enters the slave channel 343. During the period when the guide member 351 moves from the slave channel 343 to the ending point b of the opening portion 342, 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 when the wrench moves forward; after the wrench reaches the closed position, it performs a reset movement, at least when the guide member 351 is located at the ending point b of the opening portion 342 of the main channel 341, the path switching member 360 is in the second state and maintains the second state at least until the guide member 351 moves to the starting point 342a of the opening portion 342 of the main channel 341, so that the guide member 351 cannot enter the slave channel 343 during the reset movement. The state control logic of the path switching member 360 as described above needs to be designed based on the structure of the opening portion 342 to ensure the formation of the first motion path and the second motion path.

[0183] In this embodiment, Figures 31A-31D As shown, the path switching member 360 has the following state logic that is easier to implement: during the period when the wrench moves 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 moves forward and reaches the closed position, the path switching member 360 switches from the first state to the second state, and during the period when the wrench makes a reset movement after reaching the closed position and moves from the closed position to the middle position, the path switching member 360 is in the second state, so that the guide member 351 cannot enter the slave channel 343 during the reset movement starting from the closed position. 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, achieves the same function and is more stable, and has a simpler design.

[0184] Furthermore, when the wrench reaches the closed position and starts to reset, when it is in the open position, the path switching member 360 is in the first state. That is, during the reset movement of the wrench from the intermediate position to the open position, the path switching member 360 switches from the second state to the first state. In this way, when the continuously applied clamping forceps ends a use cycle, the path switching member 360 returns to the initial state so that it can function normally in the next use cycle.

[0185] 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.

[0186] Further, in order to realize the state switching of the above-mentioned path switching member 360, the clamping forceps also include a path driving member 370, which is located in the housing 321. The path switching member 360 is arranged in one of the wrench and the main body 320, and the path driving member 370 is arranged in the other of the wrench and the main body 320. Specifically, the path switching member 360 is arranged in one of the main housing 321 of the wrench and the main body 320, and the path driving member 370 is arranged in the other of the main housing 321 of the wrench and the main body 320. When the wrench moves forward or resets, when the path driving member 370 abuts against the path switching member 360, the path switching member 360 is driven to move, so that the path switching member 360 switches between the first state and the second state. The movement of the wrench drives the path driving member 370, and then drives the path switching member 360 to change its state, and finally returns to change the switching of the motion path of the guide channel 340 of the wrench itself. The movement of the wrench is the power source for switching the motion path of the wrench, realizing an internal cycle, which is simple and reliable, and does not require an additional power source to change the motion path.

[0187] When the wrench moves forward or resets, the path driving member 370 can selectively abut or disengage with the path switching member 360. When disengaging, ideally the path switching member 360 does not move but is in a fixed position and the state remains unchanged. When abutting, the path switching member 360 moves and the position changes, and the state may change. In another embodiment, the path switching member 360 can continue to abut with the path driving member 370 and continue to move. When moving to a certain position, switching between the first state and the second state occurs.

[0188] Specifically, in this embodiment, Fig.29 As shown, the path switching member 360 includes a pivoting portion 361, a triggering portion and an executing portion 363. The path switching member 360 rotates around the pivoting portion 361. The triggering portion includes a first triggering portion 362a and a second triggering portion 362b respectively arranged on both sides of the pivoting portion 361; the path driving member 370 is a guide rib, and the guide rib includes a first guide rib 371 and a second guide rib 372. The first guide rib 371 has a first guide inclined surface 498372, and the second guide rib 372 has a second guide inclined surface 498374. The first guide rib 371 is located at the front side of the first triggering portion 362a, and the second guide rib 372 is located at the rear side of the second triggering portion 362b; the first triggering portion 36 2a abuts against the first guide rib 371 and moves along the first guide slope 498372, the path switching member 360 rotates toward the first direction, and the path switching member 360 switches from the first state to the second state; when the second triggering portion 362b abuts against the second guide rib 372 and moves along the second guide slope 498374, the path switching member 360 rotates toward 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 executing portion 363 makes way for the slave channel 343 to allow the guide member 351 to enter or exit the slave channel 343, and when the path switching member 360 is in the second state, the executing portion 363 blocks the guide member 351 from entering the slave channel 343.

[0189] During the forward movement of the wrench, the path switching member 360 and the path driving member 370 undergo relative movement. The above-mentioned front side and rear side respectively refer to that when the wrench moves forward, the first guide rib 371 is located on the front side of the relative movement direction of the path switching member 360 relative to the path driving member 370, and when the wrench moves forward, the second guide rib 372 is located on the rear side of the relative movement direction of the path switching member 360 relative to the path driving member 370.

[0190] like Figure XAs shown, in this embodiment, the pivoting portion 361 is a rotating shaft 255, fixed in a horizontal pin hole 404 of the wrench main part, the first triggering portion 362a and the second triggering portion 362b are two plates extending from the rotating shaft 255, respectively, the first plate 362a' and the second plate 362b', and are at an obtuse angle, and the execution portion 363 is a rib connected to the first plate 362a'; the pivoting portion 361 of the path switching member 360 is connected to the wrench, especially the position of the wrench body 331320 close to the slave channel 343, the obtuse angle of the first plate 362a' and the second plate 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 guide inclined surface 498372 and the second guide inclined surface 498374 faces the wrench body 331320. In other embodiments, the first plate 362a' and the first plate 362a' may be at an acute angle or a right angle.

[0191] The arrangement of the path switching member 360 and the path driving member 370 on the front and rear sides enables the path switching member 360 to selectively abut or disengage from the path switching member 360 when the wrench moves forward or resets. The position of the wrench also includes a first adjacent position between the middle position and the closed position close to the closed position, and a second adjacent position between the open position and the middle position close to the open position. Specifically, Figures 33A-33DThe movement process of the path switching member 360 and the path driving member 370 is as follows: at the initial moment, the wrench is in the open position, the path switching member 360 is in the first position relative to its own pivoting portion 361, is in the first state, and is disengaged from the first guide rib 371; during the period when the wrench moves forward and moves from the open position to the first adjacent position, the path switching member 360 moves around the pivot end 334 of the wrench along with the wrench, and the first triggering portion 362a gradually approaches the first guide rib 371, and the path switching member 360 does not move in the first direction or the second direction relative to its own pivoting portion 361, and is still in the first position and in the first state; the wrench moves forward When the wrench reaches the first adjacent position, the path switching member 360 begins to abut against the first guide slope 498372 of the first guide rib 371, and the path switching member 360 is still in the first position and in the first state; the wrench continues to move forward, and before moving from the first adjacent position to the closed position, the first triggering portion 362a of the path switching member 360 moves along the first guide slope 498372, and the path switching member 360 rotates rapidly in the first direction, leaving the first position, but still in the first state; when the wrench reaches the closed position, the path switching member 360 has rotated a total of A angle in the first direction from the first position, and the path switching member 360 The pivoting portion 361 is located at the second position relative to itself, and the path switching member 360 is switched from the first state to the second state; during the reset movement of the wrench and from the closed position to the second adjacent position, the path switching member 360 moves around the pivot end 334 of the wrench along with the wrench, and the second triggering portion 362b gradually approaches the second guide rib 372 and is also in a disengaged state from the first guide rib 371. The path switching member 360 does not move in the first direction or the second direction relative to its own pivoting portion 361, and remains in the second position and in the second state; when the wrench resets and reaches the second adjacent position, the path switching member 360 begins to abut the second guide rib 372. 72, the path switching member 360 is still in the second position and in the second state; the wrench continues to reset, and before moving from the second adjacent position to the open position, the second trigger portion 362b of the path switching member 360 moves along the second guide slope 498374, and the path switching member 360 rotates rapidly in the second direction, leaving the second position, but still in the second state; when the wrench reaches the open position, the path switching member 360 rotates a total of A angle in the second direction from the second position, and the path switching member 360 returns to the first position, and the path switching member 360 switches from the second state to the first state.The first guide rib 371 and the second guide rib 372 are shorter in length, which enables faster rotation of the angle A and faster switching between the first state and the second state. The structure is simple and the cost is low. When the path switching member 360 is disengaged from the path driving member 370, the path switching member 360 has a stable position and a stable state, and the state of the clamp is more stable.

[0192] In other embodiments, different from the present embodiment, the position of the wrench also includes a third adjacent position and a fourth adjacent position between the open position and the intermediate position, the fourth adjacent position being closer to the open position, and before the wrench resets to the third adjacent position, the second trigger portion 362b is disengaged from the second guide rib 372, and the specific position, movement and state of the path switching member 360 are the same as above and will not be repeated, during the movement of the wrench from the third adjacent position to the fourth adjacent position, the second trigger portion 362b abuts against the second guide rib 372 and rotates in the second direction along the second guide slope 498374, and when it is located at the fourth adjacent position, the path switching member 360 returns to the first position and the first state, as described above; and during the subsequent movement of the wrench from the fourth adjacent position to the open position, the second guide rib 372 is disengaged from the path switching member 360, and the path switching member 360 remains in the first position and the second state. In this way, the path switching member 360 can also be restored to the initial state so that it can function normally in the next use cycle of the continuously applied clamp.

[0193] In this embodiment, the clip applier also includes a positioning mechanism, such as Fig.32 The positioning mechanism includes a first positioning member 381 and a second positioning member 382. The first positioning member 381 is arranged on the pivot portion 361 of the path switching member 360. When the path switching member 360 moves in the first direction or the second direction with the pivot portion 361 as the rotating shaft 255, the first positioning member 381 moves synchronously with the pivot portion 361 as the rotating shaft 255. The second positioning member 382 includes a first pit 383, a second pit 384 and a protrusion 440 portion 385 located between the first pit 383 and the second pit 384, and one of the first positioning member 381 and the protrusion 440 portion 385 is an elastic element. When the first positioning member 381 is located in the first pit 383, the path switching member 360 is in the first state; when the second positioning member 382 is located in the second pit 384, the path switching member 360 is in the second state. With such a positioning mechanism, the first positioning member 381 can only be fixed in the first pit 383 or the second pit 384 and cannot be located at other positions. The path switching member 360 is positioned relative to its own pivot portion 361 and can only be located at two fixed positions, such as the first position and the second position mentioned above, and the path switching member 360 is in the first state in the first position and in the second position.

[0194] The first positioning member 381 is located in the first concave pit 383. When the user operates the wrench to rotate the path switching member 360 in the first direction, the first positioning member 381 also rotates in the first direction, and the first positioning member 381 abuts against the protrusion 440 portion 385. Since one of them is an elastic element and can be compressed, the first positioning member 381 can smoothly pass over the protrusion 440 portion 385 and enter the second concave pit 384. If the user stops operating the wrench while passing over the protrusion 440 portion 385, the first positioning member 381 can also return to the first concave pit 383 under the reaction force of the elastic element. Similarly, the first positioning member 381 passes over the protrusion 440 portion 385 from the second concave pit 384 and smoothly enters the first concave pit 383, which will not be repeated.

[0195] According to the above, the path switching member 360 and the path driving member 370 can be in a disengaged state. If there is no positioning mechanism, the path switching member 360 can move freely relative to its own pivoting portion 361. When the clamp is vibrated or shaken, the path driving member 370 will rotate freely in the first direction or the second direction, thereby accidentally entering the second state during the period when the clamp needs to be in the first state, and accidentally entering the first state during the period when the clamp needs to be in the second state. The first movement path of the forward movement and the second movement path of the reset movement of the clamp are destroyed and cannot be used normally. Therefore, the positioning mechanism prevents the path switching member 360 from moving accidentally and ensures the normal movement path of the clamp.

[0196] The first positioning member 381 may be a first rib 436, facing away from the obtuse angle and protruding from the pivoting portion 361, and the protrusion 440 portion 385 is a second rib 436. In other embodiments, the elastic element may also be a metal rod with a C-shaped protrusion 440, which is elastic.

[0197] In this embodiment, the jaw assembly has a design that can stably guide, clamp and compress the first clamp, and the specific details are as follows.

[0198] The jaw assembly includes a first jaw arm and a second jaw arm. The structure of the first jaw arm is the same as that of the second jaw arm, and the present invention focuses on describing the structure of the first jaw arm. Fig.34As shown, the first clamp arm includes a bottom, a first side portion and a second side portion, and the bottom, the first side portion and the second side portion make the cross section of the first clamp arm roughly U-shaped. The first side portion includes a first guide portion and a first accommodating portion, and the first guide portion and the first accommodating portion are both arranged on the inner wall of the first side portion, and the second side portion includes a second guide portion and a second accommodating portion, and the second guide portion and the second accommodating portion are both arranged on the inner wall of the second side portion. The bottom is located between the first guide portion and the second guide portion, and a gap is formed between the first accommodating portion and the second accommodating portion. The first guide portion and the second guide portion have the same structure, and the first accommodating portion and the second accommodating portion have the same structure. The present invention focuses on describing the structure of the first guide portion and the first accommodating portion. The first guide portion includes a guide surface, and at least the second portion of the guide surface is roughly arc-shaped. The guide surface includes a first portion flush with the upper surface of the bottom, and also includes a second portion higher than the upper surface of the bottom, and the second portion is formed by the first portion extending along a roughly arc-shaped direction, and the first portion and the second portion are smoothly transitioned. The first accommodating portion is located far from the first guide portion, and the first accommodating portion is concave. The first accommodating portion includes a proximal side surface and a distal side surface, wherein the proximal side surface intersects with the second portion of the guide surface, and a rounded corner is formed at the intersection, and the intersection is the distal end of the second portion.

[0199] The jaw assembly also includes a stopper. There are four stoppers in total, which are arranged on the first jaw arm and the second jaw arm, and respectively cooperate with the first guide portion and the second guide portion of the first jaw arm and the two guide portions of the second jaw arm. The four stoppers have the same structure, and their structure is described by taking the first stopper that cooperates with the first guide portion as an example. Figure X As shown, the first stopper is located above the first guide portion, and the first stopper includes a base and a movable portion, and the movable portion includes an end portion and a middle portion, and the middle portion is located between the end portion and the base portion. The size of the base portion is larger than the middle portion and the end portion, and the base portion is engaged in the groove set in the first side portion, so that the base portion is fixed to the first side portion. The middle portion and the end portion are both located on the inner side of the inner wall of the first side portion. The movable portion can move in the upper and lower directions. Therefore, the first guide portion and the first stopper jointly form a guide space for the clip. With the same structure, the first clamp arm and the second clamp arm also have three guide spaces. The first clamp arm and the second clamp arm have a total of four guide spaces, which are matched with the four protrusions of the clamp in a one-to-one correspondence. In the initial state, the first stopper does not match the protrusion of the clamp, and the distance between the second part of the guide surface and the first stopper decreases in the direction toward the far end of the guide surface. The above distance reaches the minimum between the intersection and the first stopper. The above distance may be determined, for example, by using a minimum distance between a certain point along the second portion and the lower surface of the first stopper, wherein the minimum distance decreases in a direction toward the distal end of the guide surface.

[0200] The stopper is elastic, including the following two ways. In one way shown in this embodiment, the material of the stopper is elastic, including but not limited to metal, so that the stopper has a tendency to maintain its original position. In another way shown in other embodiments, at least a part of the stopper is connected to the clamp arm, and the clamp arm is also provided with a torsion spring, one end of the torsion spring is connected to the clamp arm, and the other end is connected to the stopper, so that the stopper has a tendency to approach the guide surface. The stopper is elastic, so that the protruding part of the clip is constrained by the stopper in the guide space, so that the clip is kept in the guide space during the process of moving far away, and then the clip is gradually opened. On the basis that the stopper has elasticity, the stopper includes a base and a movable part, and the movable part can move up and down, including two ways: in one way shown in this embodiment, the base is connected to the clamp arm, and the movable part can move up and down due to the elasticity of the material of the stopper; in another way shown in other embodiments, the base can be pivotally connected to the clamp arm, and the movable part can also pivot accordingly to move up and down, one end of the torsion spring is connected to the clamp arm, and the other end is connected to the movable part, so that the movable part has a tendency to move toward the guide surface. The movable part can move up and down, and can make room for the protrusion to smoothly leave the guide space and enter the accommodating part.

[0201] The maximum size of the first protrusion 36 is substantially the same as the maximum size of the second protrusion 37, and the shape of the first protrusion 36 and the shape of the second protrusion 37 can be the same or different, so that the first protrusion 36 and the second protrusion 37 can be applied to substantially the same guide space. It should be noted that the size of the first protrusion 36 can be set to be different from that of the second protrusion 37, and even the sizes of the two first protrusions 36 can be set to be different, and the sizes of the two second protrusions 37 can also be set to be different. In this case, the guide space matched with the protrusion can be appropriately changed, that is, the relative position, shape and / or size of the guide portion and the stopper can be appropriately changed.

[0202] When the jaw assembly is open, that is, in the fully opened state, the clip is driven by the clip delivery drive mechanism, and the clip is pushed to move far away so as to enter the jaw assembly from the clip box 220, and the first protrusion and the second protrusion of the clip respectively enter the corresponding guide space, 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 protrusion and at least a part of the second protrusion respectively enter the accommodating portion and are accommodated in the accommodating portion. The first protrusion and the second protrusion are both guided by the guide portion, and thus move along the guide surface under the constraint of the stopper, so that the clip moves in the desired direction. Before being sent 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. At this time, the clip is in an incompletely opened state. After being compressed for a period of time, the clip needs external force to restore its original shape after being separated from the sleeve 210, that is, the shape of the clip opening. Being compressed means that the two clamp arms of the clip are close to each other but not engaged. Since the clip will last for a period of time from being assembled to the clip box 220 to being used, the compression during this period of time makes the clip tend to maintain the compressed shape. The first protrusion and the second protrusion are also constrained by the stopper, so that they overcome the tendency to maintain the compressed shape in the process of moving far away in the guide space, so that the first clamp arm and the second clamp arm of the clip gradually open in the process of moving far away until they restore their original shape or keep the same angle as the jaw assembly. The clip restores its original shape or keeps the same angle as the jaw assembly, so that the clamping space between the two clamp arms of the clip is maximized, which is convenient for accommodating the tissue to be clamped therein. In the initial state, the protrusion of the clip does not enter the guide space and is not constrained by the stopper. At this time, the distance between the second part of the guide surface and the corresponding stopper decreases along the direction toward 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 reaches the minimum. Since the above distance decreases in the direction toward the distal end of the guide surface, the first protrusion and the second protrusion of the clip gradually approach the exit (i.e., the intersection) of the guide space and the entrance of the accommodating portion in the process of moving toward the distal end of the guide surface, so that the first protrusion and the second protrusion can smoothly enter the accommodating portion. The above distance decreases in the direction toward the distal end of the guide surface, for example, by at least the second portion of the guide surface being roughly arc-shaped. In the process of the first protrusion and the second protrusion moving far away in the guide space, the restraining force they are subjected to becomes increasingly greater, so that the protrusion of the clip is guided by the second portion of the guide surface and is more restrained by the stopper, thereby suppressing the moving speed of the protrusion of the clip, and preventing the protrusion from crossing the entrance of the accommodating portion due to excessive speed after leaving the guide space and thus failing to enter the accommodating portion.Further, after the first protrusion and the second protrusion reach and cross the intersection (i.e., the intersection formed by the intersection of the proximal side of the receiving portion and the second part of the guide surface), they will not continue to move in the original direction under the restraining action of the stopper, and thus will not enter the receiving portion. After the first protrusion and the second protrusion cross the intersection, they enter the receiving portion. At this time, the clip moves into place and is in the above-mentioned preparation position, completing the clip delivery. Since the movable part of the stopper can move up and down, when the distance between the second part of the guide surface and the corresponding stopper decreases in the direction toward the far end of the guide surface, while the stopper restrains the protrusion of the clip, the movable part of the stopper can make room for the protrusion of the clip by moving, so that it can leave the guide space and enter the receiving portion under the restraint. The restraint of the protrusion by the stopper can be achieved, for example, by the stopper abutting the protrusion. At least a portion of the first protrusion and at least a portion of the second protrusion are respectively accommodated in the receiving portion, so that the clip maintains a stable position during the closing process of the jaws, that is, during the clamping process. Furthermore, the accommodating portion is recessed, which helps the first protrusion and the second protrusion of the clip to remain in the accommodating portion continuously and not easily disengage. Furthermore, the first protrusion and the second protrusion accommodated in the accommodating portion are both subjected to the force applied by the stopper abutting against them, so that the first protrusion and the second protrusion are more stably maintained in the accommodating portion. The above-mentioned force can be, for example, a force generally downward and upward, or a force generally directed toward the distance, which is related to the position where the stopper abuts against the protrusion. The position of the first protrusion and the second protrusion is stable, so that the position of the clip is kept stable during the closing process of the jaws, thereby ensuring the clamping effect. It should be noted that the present invention also includes a clip delivery stop mechanism, which is used to prevent the clip delivery drive mechanism from retreating, and then prevent the clip from retreating. The function of the accommodating portion and the stopper is to keep the position of the clip at the far end of the jaw assembly stable, so as to facilitate smooth clamping.

[0203] Subsequently, the jaw assembly enters the closing process, and the first clamp arm and the second clamp arm approach each other until they reach the end point of the closing stroke, at which time the jaw assembly completes the 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 clamp arm will not be able to apply force to at least one protrusion through the accommodating portion, which will cause the clamp to twist or deviate from the correct position, so that the two clamp arms cannot be engaged, 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, thereby, during the closing process of the jaw assembly, the first clamp arm drives the first clamp arm, and the second clamp arm drives the second clamp arm to rotate around the connecting portion so that the first clamp arm and the second clamp arm approach each other, and finally the first clamping portion of the first clamp arm is engaged with the second clamping portion of the second clamp arm, so that the first clamp arm and the second clamp arm are fixed to each other. During the closing process of the jaw assembly, the clamp maintains a stable position, avoiding the clamp from moving or twisting unexpectedly, which may cause 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, and the two second protrusions are also both abutted by the stopper, which further ensures that the protrusion is accommodated in the accommodating portion and will not escape from the accommodating portion.

[0204] 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 amount of time, the distance the second clamp arm moves toward the far end is greater than the distance the first clamp arm moves toward the far end, thereby allowing the clamp to move along the same direction as it moves. Figure X The counterclockwise rotation in X makes the first protrusion and the second protrusion of the clamp located on the same vertical line, changing the state that the first protrusion and the second protrusion are not on the same vertical line when compressed, thereby avoiding the unsmooth movement caused by the uneven force on the clamp during movement, and avoiding 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 far from the second protrusion of the second clamp arm. In this embodiment, the first part of the guide surface of the first guide portion and the second guide portion of the second clamp arm, except for the stroke extension structure, can be flush with the upper surface of the bottom.

[0205] The clip applier also includes a first elastic element. Figure XAs shown in X, the first clamp arm and the second clamp arm both include a receiving groove, which is a through groove, used to accommodate the clamp feeding drive mechanism when the jaw assembly is closed, especially the clamp feeding block 231 and part of the elastic push rod 232 of the clamp feeding drive mechanism, so as to avoid interference between the first clamp arm and the second clamp arm and the clamp feeding drive mechanism when the jaw assembly is closed. The proximal end of the first clamp arm has a protrusion, and the clamp box 220 has a hole 404. The protrusion is accommodated in the hole 404, so that the proximal end of the first clamp arm can be pivotally connected to the distal end of the clamp box 220, and the proximal end of the second clamp arm can be pivotally connected to the distal end of the clamp box 220. One end of the first elastic element is connected to the proximal end of the first clamp arm, and the other end is connected to the proximal end of the second clamp arm. The elastic force of the first elastic element causes the proximal end of the first clamp arm and the proximal end of the second clamp arm to move away from each other, thereby keeping the first clamp arm and the second clamp arm in an open state (the jaw assembly is fully opened). The proximal end of the first clamp arm and the proximal end of the second clamp arm are both located in the sleeve 210, as shown in FIG. Figure X As shown in FIG. 1 , the distal end of the sleeve 210 cooperates with the lower surface of the first clamp arm and the upper surface of the second clamp arm. The sleeve 210 is driven by the jaw drive mechanism to move, and the distal end of the sleeve 210 also moves accordingly. As the distal end of the sleeve 210 moves far away, the distal end of the sleeve 210 cooperates with the lower surface of the first clamp arm and the upper surface of the second clamp arm, driving the first clamp arm and the second clamp arm to pivot so that they are close to each other, thereby achieving the closing of the jaw assembly. After the jaw assembly is closed, the first elastic element is compressed and stores energy. As the sleeve 210 moves proximally, the distal end of the sleeve 210 moves proximally, and the energy accumulated after the first elastic element is compressed is released, and the elastic force of the first elastic element causes the proximal end of the first clamp arm and the proximal end of the second clamp arm to move away from each other, thereby causing the first clamp arm and the second clamp arm to open. The use of the first elastic element to achieve the opening of the jaw assembly avoids the use of a complex mechanism to achieve the above-mentioned function. Preferably, the first elastic element is a U-shaped spring. After being compressed, the two arms of the U-shaped spring approach each other to achieve energy storage. The U-shaped spring occupies less space and has a greater elastic force than an ordinary spring. The above-mentioned opening has the same meaning as opening.

[0206] It should be noted that the far direction may be a direction generally facing the far direction, including the longitudinal direction and the direction forming a certain angle with the longitudinal direction.

[0207] Combination Figure 43 to Figure 45 , which is the second embodiment of the present invention, is the same as the first embodiment, and this embodiment relates to a clamp.

[0208] Compared with the first embodiment, the present embodiment is different in that the driving member selectively drives the clamp feeding drive mechanism or the clamp pushing drive mechanism under the action of the actuator 330; in the first state, the driving member is separated from the clamp feeding drive mechanism and combined with the clamp pushing drive mechanism to drive the clamp feeding drive mechanism to move; in the third state, the driving member is separated from the clamp feeding drive mechanism and combined with the clamp pushing drive mechanism to drive the clamp pushing drive mechanism to move. In the present embodiment, when the driving member drives the clamp feeding drive mechanism to move, the clamp pushing drive mechanism does not retreat to store energy, but remains stationary at the initial position without any movement; in this way, it can also effectively ensure that the clamp feeding action and the clamp pushing action are not synchronized and do not interfere with each other. Compared with the first embodiment, while effectively ensuring the safety and reliability of the clamp applicator, the overall structure of the clamp applicator is simpler.

[0209] The jaw drive mechanism is sleeved on the clamp feeding drive mechanism and the clamp pushing drive mechanism, and is used to drive the jaw assembly to close; in the third state, the driving member is simultaneously combined with the jaw drive mechanism and the clamp pushing drive mechanism to drive the jaw drive mechanism and the clamp pushing drive mechanism to move synchronously. In this embodiment, since the jaw drive mechanism and the clamp pushing drive mechanism move synchronously, compared with the first embodiment, the transmission mechanism has no second state. The clip delivery drive mechanism includes a clip delivery drive tube 402, a clip delivery assembly connected to the clip delivery drive tube 402, and the clip delivery drive tube 402 drives the clip delivery assembly to move so as to drive the clip to enter the jaw assembly, and the specific structure is the same as described above; the jaw drive mechanism includes a jaw drive tube 432 and a sleeve 210 connected to the jaw drive tube 432, and the specific structure is the same as described above; the clamp push drive mechanism includes a clamp push drive tube 459, and a clamp push drive member connected to the clamp push drive tube 459, and the clamp push drive member is provided with a plurality of side cavities 252 at intervals along the longitudinal direction, and each side cavity 252 is correspondingly provided with a clamp push block 253, and the clamp push drive member drives the clamp push block 253 to move. In this embodiment, the clamp push drive member is a clamp push rod 251, and the specific structure of the clamp push rod 251 is the same as described above. The structure of the drive member is the same as the structure of the switching mechanism described above or later, and will not be described in detail here. In order to make the overall structure more compact, the push-clamp drive tube 459 is sleeved on the clamp delivery drive tube 402, and the push-clamp drive tube 459 is coaxial with the clamp delivery drive tube 402. The clamp delivery assembly and the push-clamp drive member are located on both sides of the clamp box 220. Specifically, the clamp delivery assembly is located on the outside of the clamp box 220, and the push-clamp drive member is located on the inside of the clamp box 220. In order to realize the simultaneous combination of the driving member with the jaw driving mechanism and the push-clamp driving mechanism, the proximal end of the push-clamp driving tube 459 is flush with the proximal end of the jaw driving tube 432, and the distal end surface 508 of the driving member is combined with the proximal end surfaces 502 of the two to promote their synchronous movement. Of course, it is understandable that the proximal end of the push-clamp driving tube 459 may not be flush with the proximal end of the jaw driving tube 432. At this time, it is only necessary to ensure that the distance from the distal end surface 508 where the driving member abuts against the push-clamp driving tube 459 to the push-clamp driving tube 459 is equal to the distance from the distal end surface 508 where the driving member abuts against the jaw driving tube 432 to the jaw driving tube 432.

[0210] Of course, in another embodiment, in the third state, the driving member first drives the clamp push drive mechanism to move to combine with the jaw drive mechanism, and then drives the jaw drive mechanism and the clamp push drive mechanism to move synchronously. The jaw drive mechanism is sleeved on the clamp feeding drive mechanism and the clamp push drive mechanism. In the initial state, the distance from the proximal end of the clamp push drive tube 459 to the distal end of the driving member is smaller than the distance from the proximal end of the jaw drive tube 432 to the distal end of the driving member. In this way, during the movement of the driving member, it first combines with the clamp push drive tube 459, pushes the clamp push drive tube 459 to move to combine with the jaw drive tube, and then pushes the jaw drive tube 432 and the clamp push drive tube 459 to move together. Similarly, in order to make the overall structure more compact, the clamp push drive tube 459 is sleeved on the clamp feeding drive tube 402.

[0211] The jaw drive mechanism also includes a second reset member 446, such as an elastic element. The elastic element is sleeved outside the jaw drive tube 432, one end of the elastic element abuts against the baffle 434 on the outer surface of the jaw drive tube 432, and the other end extends forward and abuts against the inner wall of the housing 321 of the clamping forceps. The elastic element is used to store energy when the jaw drive mechanism advances, and the elastic element restores the deformation and releases the energy to provide power for the reset of the jaw drive mechanism. The push-clip drive mechanism also includes 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 clamping forceps, and the other end extends backward and abuts against the distal end surface 508 of the push-clip drive tube 459. The elastic element is used to store energy when the push-clip drive mechanism advances, and the elastic element restores the deformation and releases the energy to provide power for the reset of the push-clip drive mechanism. The clip delivery drive mechanism also includes a first reset member 418, such as an elastic element. One end of the elastic element abuts against the convex rib 436 on the inner wall of the push-clamp drive tube 459, and the other end extends backward and abuts against the distal surface 508 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 resetting of the clamp delivery drive mechanism.

[0212] The following describes in detail the working process of the clamping forceps to realize clamp delivery, jaw assembly closing, and clamp pushing, taking the third state in which the driving member is simultaneously combined with the jaw driving mechanism and the clamp pushing driving mechanism to drive the jaw driving mechanism and the clamp pushing driving mechanism to move synchronously as an example:

[0213] The operator presses the actuator 330 to move the actuator 330 from the open position to the middle position. Under the action of the actuator 330, the driver drives the clamp delivery drive mechanism forward, and the proximal end of the clamp delivery drive tube 402 and the distal end of the driver gradually approach the proximal end of the jaw drive tube 432 and the clamp push drive tube 459; when the actuator 330 moves to the middle position, the guide member of the driver runs to the second guide surface 496 in the shell 321, the block 482 disengages from the slot of the clamp delivery drive tube 402, the driver separates from the clamp delivery drive mechanism, the forward stroke of the clamp delivery drive mechanism ends, and the clamp located at the farthest end of the clamp box 220 is delivered into the jaw assembly (the clamp delivery action is completed), and the distal end surface 508 of the driver abuts against the proximal end surface 502 of the jaw drive tube 432 and the proximal end surface 502 of the clamp push drive tube 459. The stopper end 354 of the clip delivery stopper mechanism can abut against the clip delivery drive tube 402 after the switching mechanism is separated from the clip delivery drive mechanism to prevent the clip in the jaw assembly from retreating due to the retreat of the clip delivery drive mechanism. Continue to press the actuator 330, the actuator 330 moves from the middle position to the closed position, and the clip delivery stopper mechanism gradually disengages from the clip delivery drive tube 402; the driver pushes the jaw drive mechanism and the clamp push drive mechanism forward under the action of the actuator 330, the jaw drive tube 432 drives the sleeve 210 forward to close the jaw assembly, and the clamp push drive mechanism moves forward to move the remaining clips in the clamp box 220 forward by one station, when the actuator 330 moves to the closed position, the jaw assembly is closed (the jaw closing action is completed) and the remaining clips in the clamp box 220 are all moved forward by one station (the clamp push action is completed), the clip delivery stopper mechanism completely disengages from the clip delivery drive tube 402, and the clip delivery drive tube 402 is reset under the action of the first reset member 418. The actuating member 330 is released, the jaw drive mechanism is reset under the action of the second reset member 446, and the push-clip drive mechanism is reset under the action of the third reset member 456. That is to say, in this working process, the switching mechanism is first separated from the jaw drive mechanism and the push-clip drive mechanism, and combined with the clip delivery drive mechanism to drive the clip delivery drive mechanism to move, and then separated from the clip delivery drive mechanism, and combined with the jaw drive mechanism and the push-clip drive mechanism at the same time to drive the jaw drive mechanism and the push-clip drive mechanism to move synchronously.

[0214] The following is a detailed description of the relevant working process of the clamping forceps of the present invention in which one actuator 330 drives three driving mechanisms.

[0215] The switching mechanism is respectively connected to the clamp feeding drive mechanism, the jaw driving mechanism and the clamp pushing drive mechanism; the switching mechanism abuts against the actuator 330 for receiving power; under the action of the actuator 330, the switching mechanism drives the clamp feeding drive mechanism to perform the clamp feeding action, drives the jaw driving mechanism to perform the jaw closing action, and drives the clamp pushing drive mechanism to perform the clamp pushing action in a preset order; the number of actuators 330 is one.

[0216] The advantage of this design is that the doctor operates one actuator 330, which acts on the switching mechanism through the actuator 330, and then acts on three different driving mechanisms, namely, the clip delivery driving mechanism, the jaw driving mechanism and the clamp pushing driving mechanism, so that the three different driving mechanisms can complete corresponding actions in a preset order. That is, the doctor can complete the three actions of clip delivery, jaw closing and clamp pushing by operating one actuator 330, and these three actions meet the preset order and will not interfere with each other, thereby ensuring the safety and smoothness of the doctor's surgical operation, and the operation is simple and user-friendly.

[0217] According to the working mode of the clamp applicator, the three actions of jaw closing, clamp delivery and clamp pushing cannot be performed at the same time. In this embodiment, the three actions follow the preset order that the clamp delivery action is performed earlier than the jaw closing action and clamp pushing action. That is to say, the clamp delivery action is performed first, and the jaw closing action and clamp pushing action are performed later. The order relationship of the three actions can be that the clamp delivery action is performed first, the jaw closing action is performed later, and the clamp pushing action is performed later in the first embodiment; or it can be that the clamp delivery action is performed first, and the jaw closing action and clamp pushing action are performed later in the second embodiment, wherein the jaw closing action and clamp pushing action can be performed simultaneously, or the clamp pushing action can be performed first and then the jaw closing action and clamp pushing action are performed synchronously. Specifically, it can be known from the description of the first embodiment that the push-clip driving mechanism is connected to the switching mechanism through the matching mechanism, and the push-clip driving mechanism and the switching mechanism move in opposite directions; the actuating member 330 is pressed, and the switching mechanism is first separated from the jaw driving mechanism under the action of the actuating member 330, and is combined with the clamp feeding driving mechanism to drive the clamp feeding driving mechanism forward to perform the clamp feeding action, and then separated from the clamp feeding driving mechanism, and is combined with the jaw driving mechanism to drive the jaw driving mechanism forward to perform the jaw closing action; when the switching mechanism drives the clamp feeding driving mechanism and the jaw driving mechanism forward, the matching mechanism is driven to move at the same time to drive the push-clip driving mechanism backward and store energy; the push-clip driving mechanism includes a third reset member 456 for storing the energy; the actuating member 330 is released, and the push-clip driving mechanism moves forward under the action of the third reset member 456 to perform the push-clip action. The structures, positional relationships, connection relationships, and movement relationships of the switching mechanism, the clamp feeding driving mechanism, the jaw driving mechanism, and the push-clip driving mechanism are the same as those of the first embodiment, and are not repeated here.

[0218] It can be known from the description of the second embodiment that under the action of the actuator 330, the switching mechanism is first separated from the jaw drive mechanism and the push-clip drive mechanism, and is combined with the clamp feeding drive mechanism to drive the clamp feeding drive mechanism to move, and then separated from the clamp feeding drive mechanism, and is combined with the jaw drive mechanism and the push-clip drive mechanism at the same time to drive the jaw drive mechanism and the push-clip drive mechanism to move synchronously; or the switching mechanism is first separated from the jaw drive mechanism and the push-clip drive mechanism, and is combined with the clamp feeding drive mechanism to drive the clamp feeding drive mechanism to move, and then separated from the clamp feeding drive mechanism, and is combined with the push-clip drive mechanism to drive the push-clip drive mechanism to move until it is combined with the jaw drive mechanism, and then drives the jaw drive mechanism and the push-clip drive mechanism to move synchronously. The structure, positional relationship, connection relationship, movement relationship, etc. of the switching mechanism, the clamp feeding drive mechanism, the jaw drive mechanism, and the push-clip drive mechanism are the same as those of the third embodiment, and will not be repeated here.

[0219] In addition, the structure of the actuating member 330 is the same as described above and will not be described again herein.

[0220] Combination Figures 46 to 50 , which is the third embodiment of the present invention, is the same as the above-mentioned embodiment, and this embodiment relates to a clamp.

[0221] Compared with the above-mentioned embodiments, the present embodiment is different in that the structure of the first clutch mechanism of the switching mechanism is different. In the present embodiment, the height difference between different parts of the guide rail is used to force the first clutch member to flip to engage different drive mechanisms, so as to achieve the switching between different clamp feeding actions and jaw closing actions. The first clutch member includes a pivot block 514, and the clutch switching mechanism is the same as the above-mentioned. The proximal end of the clamp feeding drive mechanism is provided with a first groove 314524, and the pivot block 514 cooperates with the first groove 314524 to combine the first clutch member with the clamp feeding drive mechanism. The second clutch member is the distal end surface 508 of the body of the switching mechanism. The pivot block 514 is pivotally arranged on the body of the switching mechanism, and includes a block body 516, a first engaging recess 518 at the lower end of the block body 516, and a first rotating shaft 520255 at the rear end of the block body 516. The pivot block 514 is pivotally connected to the switching mechanism body 500 via the first rotating shaft 520255. The upper end of the pivot block 514 is provided with a hole 404 for installing the guide column 490. The pivot block 514 is slidably matched with the guide rail in the housing 321 via the guide column 490. The first clutch member also includes a spring sheet 522 arranged above the first guide surface 494, and the spring sheet 522 applies a downward force to the guide column 490, so that the first clutch member can be better combined with the clamp feeding drive mechanism. In the initial state, the first engaging recess 518 of the pivot block 514 remains engaged with the first groove 314524 of the clamp delivery drive mechanism, and the actuator 330 drives the switching mechanism forward, and the pivot block 514 moves forward accordingly and drives the clamp delivery drive mechanism to move toward the distal end to perform the clamp delivery action. When the guide column 490 moves along the inclined surface 498 to the second guide surface 496, the pivot block 514 flips upward around the first rotating shaft 520255 to lift the first engaging recess 518, thereby disengaging it from the first groove 314524, that is, separating it from the clamp delivery drive tube 402. At this time, the distal surface 508 of the main body of the switching mechanism is combined with the proximal end of the jaw drive mechanism, thereby driving the jaw drive mechanism to move to perform the jaw closing action. Of course, it is easy to think that the flipping angle of the pivot block 514 can also be adjusted so that when the first engaging recess 518 of the pivot block 514 is separated from the first groove 314524 on the clamp driving tube 402, the first engaging recess 518 is combined with the proximal end of the jaw driving mechanism, thereby driving the jaw driving mechanism to move.

[0222] Combination Figure 51 to Figure 54 , which is the fourth embodiment of the present invention, is the same as the above-mentioned embodiment and relates to a clamp.

[0223] Compared with the above-mentioned embodiments, the present embodiment is different in that the structure of the switching mechanism is different. In the present embodiment, the switching mechanism does not include a moving part and a moving guide part, and the switching mechanism includes a rotating arm 526 pivotally arranged on the switching mechanism body 500, wherein the rotating arm 526 includes a rotating arm body 528, a second engaging recess 530 at the lower end of the rotating arm body 528, and a second rotating shaft at the rear end of the block body 516, and the rotating arm 526 is pivotally connected to the switching mechanism body 500 through the second rotating shaft, and the switching mechanism body 500 is sleeved on the clamp feeding drive mechanism. In the initial state, the second engaging recess 530 of the rotating arm 526 is engaged with the second groove 534 of the clamp feeding drive mechanism; the actuator 330 drives the switching mechanism forward to drive the clamp feeding drive mechanism to move to the distal end to perform the clamp feeding action. When the rotating arm 526 moves to the proximal end of the jaw driving mechanism, the switching mechanism is continued to be driven, and the inclined surface 498 of the rotating arm 526 is turned upward under the guidance of the proximal guide surface of the jaw driving mechanism, so that the second engaging 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 combine with the jaw driving mechanism, thereby driving the jaw driving mechanism forward. The advantage of this design is that the structure of the switching mechanism is simplified, making the overall structure more compact.

[0224] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0225] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clip applier, characterized in that: The clip applier comprises: A housing and a user-operated wrench, the wrench being movably connected to the housing, the user operating the wrench to perform a forward motion, and in response to the user operation, the wrench moving from an open position to an intermediate position and then to a closed position; A clip box connected to the housing, the clip box comprising a plurality of clips; A jaw assembly connected to the clamping box; A clip feeding drive mechanism and a jaw driving mechanism are connected to the wrench, at least part of the clip feeding drive mechanism and at least part of the jaw driving mechanism are accommodated in the housing, the clip feeding drive mechanism drives the farthest clip to move forward and enter the jaw assembly in response to the wrench moving from the open position to the intermediate position, and when the wrench is in the intermediate position, the clip is in the ready position; the jaw driving mechanism drives the jaw driving mechanism to move forward in response to the wrench moving from the intermediate position to the closed position, thereby driving the jaw assembly to close, and when the wrench is in the closed position, the jaw assembly is in a closed state; A wrench reset mechanism is connected to the wrench. When the user does not operate the wrench, the wrench reset mechanism drives the wrench to perform a reset movement, and the direction of the reset movement is opposite to the forward movement; A wrench locking mechanism, comprising a guide member and a guide channel disposed on the wrench and moving with the wrench, the guide channel comprising a starting point, a locking point and an end point, at least a portion of the guide member being accommodated in the guide channel, and the guide member and the guide channel moving relative to each other; The guide member moves from the starting point to the locking point in response to the wrench moving from the open position to the middle position, and the guide member moves from the locking point to the end point in response to the wrench moving from the middle position to the closed position; when the user operates the wrench to make a forward movement, if the wrench is located in the middle position when the wrench is not operated, the guide member prevents the wrench from making a reset movement at the locking point.

2. The clip applier according to claim 1, wherein: In the guide channel, only when the guide member is located at the locking point, the guide member prevents the wrench from resetting.

3. The clip applier according to claim 2, wherein: The wrench moves forward between the intermediate position and the closed position before reaching the closed position. When the operation of the wrench stops, the wrench reset mechanism drives the wrench to reset to the intermediate position, the guide moves to the locking point, and the guide prevents the wrench from continuing to reset at the locking point.

4. The clip applier according to claim 1, wherein: The guiding channel is a closed groove.

5. The clip applier according to claim 1 or 4, characterized in that: The wrench includes a wrench body, a user-operated pressing portion arranged at one end of the wrench body, and a pushing portion arranged at the other end of the trigger body, wherein the pushing portion drives the clamp feeding drive mechanism or the jaw driving mechanism to move; the wrench body is provided with a pivot end pivotally connected to the shell; the guide channel is located in the wrench body and between the pivot end and the pushing portion.

6. The clip applier according to claim 1, wherein: The guide channel comprises a main channel and only one slave channel extending from an opening of the main channel, the opening is located between two ends of the main channel, the two ends of the main channel are respectively provided with the starting point and the end point, and the end of the slave channel away from the opening is provided with the locking point; The wrench locking mechanism also includes a wrench locking elastic element, and the wrench locking elastic element drives the guide member to separate from the main channel and enter the slave channel.

7. The clip applier according to claim 6, wherein: The slave channel includes a blocking wall. When the wrench is not operated and the guide member is located at the locking point, the guide member abuts against the blocking wall in the reset movement direction of the wrench, thereby preventing the wrench from performing reset movement at the locking point.

8. The clip applier according to claim 7, wherein: The main channel includes a first wall extending from a starting point to a first wall connected to the barrier wall, wherein the first wall and the barrier wall form a right angle or an acute angle.

9. The clip applier according to claim 7, wherein: The slave channel further includes a guide wall connected to the blocking wall, and the guide wall guides the guide member to move bidirectionally between the locking point and the end point.

10. The clip applier according to claim 9, wherein: The main channel further includes a second wall extending from the end point to be connected to the guide wall, wherein the second wall forms an obtuse angle with the guide wall.

11. The clip applier according to claim 6, wherein: The wrench locking mechanism also includes a guide pivot member, which includes a pivot end pivotally connected to the shell, the guide member extending from the pivot end, and a force-bearing end. One end of the wrench locking elastic element abuts the force-bearing end, and the other end abuts the shell.

12. The clip applier according to claim 11, wherein: The wrench locking elastic element is a spring.

13. The clip applier according to claim 11, wherein: The guide pivot member further includes a stop end extending from the pivot end; Before the wrench moves from the open position to the intermediate position, the stop end remains disengaged from the clamp feeding drive mechanism; Before the wrench moves from the intermediate position to the closed position, the stop end maintains an abutment state with the clamp feeding drive mechanism to prevent the clamp feeding drive mechanism from retreating.

14. The clip applier according to claim 6, wherein: The guide member has a first movement path when the wrench moves forward and a second movement path when the wrench moves back to the closed position, the first movement path includes the main channel and the slave channel, the second movement path includes the main channel but does not include the slave channel; the clamp also includes a path switching member, which is used to switch the first movement path and the second movement path.

15. The clip applier according to claim 14, wherein: The path switching member has two states. When the path switching member is in a first state, the path switching member opens the slave channel to allow the guide member to enter or exit the slave channel. When the path switching member is in a second state, the path switching member blocks the guide member from entering the slave channel.

16. The clip applier according to claim 15, wherein: The opening of the main channel includes a starting point and an end point; when the wrench moves forward, when the guide member is located at the starting point of the opening, the path switching member is in the first state; when the guide member enters the slave channel and the guide member moves from the slave channel to the end point of the opening, the path switching member is in the first state; The wrench performs a reset movement after reaching the closed position, and when the guide member is located at the end point of the opening, the path switching member is in the second state and maintains the second state until the guide member moves to the starting point of the opening.

17. The clip applier according to claim 15, wherein: During the period when the wrench moves forward from the open position to the closed position, the path switching member is in the first state; When the wrench moves forward and reaches the closed position, the path switching member switches from the first state to the second state. After the wrench reaches the closed position, it performs a reset movement and moves from the closed position to the intermediate position, and the path switching member is in the second state.

18. The clip applier of claim 17, wherein: The wrench performs a reset movement after reaching the closed position, and when located at the open position, the path switching member is in the first state.

19. The clip applier of claim 15, wherein: The clip applier further includes a path driver, the path switch is disposed in one of the wrench and the housing, and the path driver is disposed in the other of the wrench and the housing; When the wrench is in forward motion or in resetting motion, the path driving member abuts against the path switching member to drive the path switching member to move, so that the path switching member switches between the first state and the second state.

20. The clip applier of claim 19, wherein: The path switching member includes a pivoting portion, a triggering portion and an executing portion, the path switching member rotates around the pivoting portion as an axis, and the triggering portion includes a first triggering portion and a second triggering portion respectively arranged on both sides of the pivoting portion; The path driving member is a guide rib, the guide rib includes a first guide rib and a second guide rib, the first guide rib has a first guide slope, the second guide rib has a second guide slope, the first guide rib is located at the front side of the first triggering portion, and the second guide rib is located at the rear side of the second triggering portion; When the path switching member is in the first state and the first triggering portion abuts against the first guide rib and moves along the first guide inclined surface, the path switching member rotates toward the first direction, and the path switching member switches from the first state to the second state; when the path switching member is in the second state and the second triggering portion abuts against the second guide rib and moves along the second guide inclined surface, the path switching member rotates toward the second direction, and the path switching member switches from the second state to the first state; The first direction is opposite to the second direction; When the path switching member is in the first state, the executing part makes way for the slave channel to allow the guide member to enter or exit the slave channel, and when the path switching member is in the second state, the executing part blocks the guide member from entering the slave channel.

21. The clip applier of claim 20, wherein: The pivoting portion of the path switching member is connected to the wrench, and the guide rib is arranged on the inner side of the housing.

22. The clip applier of claim 21, wherein: The clip applier further comprises a positioning mechanism, the positioning mechanism comprising a first positioning member and a second positioning member, the first positioning member being disposed at a pivoting portion of the path switching path, the second positioning member comprising a first recess, a second recess and a protrusion disposed on the wrench, one of the first positioning member and the protrusion being an elastic element, and when the first positioning member is located at the first recess, the path switching member is in the first state; When the second positioning member is located in the second pit, the path switching member is in the second state.

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