A clip applier

Abstract

The present invention discloses a clamping forceps, comprising a clamp feeding drive mechanism and a clamp pushing drive mechanism; the clamp feeding drive mechanism is used to drive the clamp at the farthest end of the clamp box to move forward into the jaw assembly, and the clamp pushing drive mechanism is used to drive the remaining clamps in the clamp box to move forward one station; the clamp feeding drive mechanism comprises a clamp feeding proximal drive member and a clamp feeding distal drive member connected to the clamp feeding proximal drive member, and the clamp pushing drive mechanism comprises a clamp pushing proximal drive member and a clamp pushing distal drive member connected to the clamp pushing proximal drive member; the motion trajectory of the clamp feeding proximal drive member is parallel to the motion trajectory of the clamp pushing proximal drive member, and the motion trajectory of the clamp feeding distal drive member intersects with the motion trajectory of the clamp pushing distal drive member. The clamping forceps of the present invention use different drive mechanisms to perform the clamp feeding action and the clamp pushing action in a time-sharing manner, which can realize more reliable and stable execution of the clamp feeding action and the clamp pushing action.

Description

Technical Field

[0001] The present invention relates to a clip applier. Background Art

[0002] During surgical procedures, it is common to temporarily or permanently ligate blood vessels or other tissues in the body 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 clips. The first suturing method requires the doctor 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] Typically, these clips are applied to blood vessels or other tissues using a dedicated instrument, often called a clip applier. Traditional clip appliers are single-use only. After installing a clip externally, the jaws of the clip applier are inserted into the body to apply the clip. Repeated installation of a single clip is inconvenient, leading to the development of clip appliers capable of continuous clip application.

[0004] A continuous clamping forceps is known, comprising a jaw assembly, a clamp box, a handle and a pushing mechanism. The clamp box is a long box, which contains a first clamp located at the front end and other clamps arranged one by one behind the first clamp. During use, clamp delivery, clamp pushing and clamp application are required. Clamp delivery is to push the first clamp into the jaw position, and clamp pushing is to push the other clamps to move a position toward the front end in the clamp box so that a new first clamp is added to the front end. Clamp application is to close the jaws so that the clamp located in the jaw assembly is closed. The handle provides power to drive clamp delivery, clamp pushing and clamp application. The pushing mechanism is an integrally formed thin metal strip - a pushing piece, which is installed on the side of the clamp box. A feeding piece is provided at the front end of the pushing piece, and multiple pushing pieces are provided at the middle end corresponding to the spacing of the other clamps mentioned above. The feeding piece and the pushing piece are elastically inclined to the main body of the pushing piece. The rear end of the pushing piece is connected to the handle, so that the movement of the handle drives the pushing piece to move forward or back and forth. When the pushing piece moves forward, the feeding piece is tilted from the side to press against the first clamp, and multiple pushing pieces are tilted against other clamps, and all clamps move forward at the same time.

[0005] In this integrated pushing mechanism, the clip delivery piece and the clip pushing piece must be sheet-shaped, otherwise the clip delivery piece and the clip pushing piece will collide and interfere with the clamp when retreating. However, the sheet-shaped structure is not rigid enough and is easy to bend, resulting in instability in both the clip delivery and clip pushing, which makes the clip applier unable to work normally, thereby affecting the progress of the operation. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a clip applier, which is achieved through the following technical solutions:

[0007] A clamping forceps comprises a shell, a transmission mechanism, an actuator, a jaw assembly, and a clamp accommodated in a clamp box, wherein at least part of the transmission mechanism is accommodated in the shell; the actuator is used to provide power to the transmission mechanism; it is characterized in that the transmission mechanism comprises a clamp feeding drive mechanism and a clamp pushing drive mechanism; the clamp feeding drive mechanism is used to drive the clamp at the farthest end of the clamp box to move forward into the jaw assembly, and the clamp pushing drive mechanism is used to drive the remaining clamps in the clamp box to move forward one work station; the clamp feeding drive mechanism comprises a clamp feeding proximal drive member and a clamp feeding distal drive member connected to the clamp feeding proximal drive member, the clamp pushing drive mechanism comprises a clamp pushing proximal drive member and a clamp pushing distal drive member connected to the clamp pushing proximal drive member; the motion trajectory of the clamp feeding proximal drive member is parallel to the motion trajectory of the clamp pushing proximal drive member, and the motion trajectory of the clamp feeding distal drive member intersects with the motion trajectory of the clamp pushing distal drive member.

[0008] Furthermore, the transmission mechanism also includes a jaw driving mechanism, and the clamp feeding driving mechanism and the clamp pushing driving mechanism both move within the jaw driving mechanism; the motion trajectory of the jaw driving mechanism is parallel to the motion trajectory of the clamp feeding proximal driving member or the motion trajectory of the clamp pushing proximal driving member, and intersects with the motion trajectory of the clamp feeding distal driving member or the motion trajectory of the clamp pushing distal driving member.

[0009] Furthermore, the jaw drive mechanism includes a jaw drive tube and a sleeve connected to the jaw drive tube. The jaw drive tube drives the sleeve to move, thereby driving the jaw assembly to close. The motion trajectory of the jaw drive tube and the motion trajectory of the sleeve together constitute the motion trajectory of the jaw drive mechanism.

[0010] Furthermore, the proximal end driving member for clamp delivery includes a clamp delivery driving tube, and the distal end driving member for clamp delivery includes a clamp delivery block; the clamp delivery driving tube drives the clamp delivery block to move, thereby driving the clamp to be delivered into the jaw assembly; the proximal end driving member for clamp pushing includes a matching block, and the distal end driving member for clamp pushing includes a plurality of clamp pushing blocks, and the matching block drives the plurality of clamp pushing blocks to move, thereby driving the remaining clamps in the clamp box to move forward one station; the motion trajectory of the clamp delivery driving tube is parallel to the motion trajectory of the matching block and the motion trajectory of the jaw drive mechanism, and the motion trajectory of the clamp delivery block intersects with the motion trajectory of the clamp pushing block and the motion trajectory of the jaw drive mechanism.

[0011] Furthermore, the clamp delivery drive mechanism also includes a clamp delivery rod, and the clamp delivery block is connected to the clamp delivery drive tube via the clamp delivery rod; the clamp delivery drive mechanism also includes a base fixedly connected to the shell, and the base is slidably matched with the clamp delivery rod; a guide slope is provided at the far end of the base for guiding the clamp delivery block to be pushed out from the base to drive the clamp at the farthest end of the clamp box; the movement trajectory of the clamp delivery rod is parallel to the movement trajectory of the jaw drive mechanism.

[0012] Furthermore, the push-clamp drive mechanism also includes a push-clamp rod, and the push-clamp block is connected to the matching block through the push-clamp rod. A plurality of side cavities are arranged along the rod direction of the push-clamp rod, and each side cavity is correspondingly installed with a push-clamp block; the movement trajectory of the push-clamp rod is parallel to the movement trajectory of the jaw drive mechanism.

[0013] Furthermore, the transmission mechanism also includes a switching mechanism and a matching mechanism, the switching mechanism is used to selectively drive the clamp feeding drive mechanism or the jaw drive mechanism; the matching mechanism is connected to the switching mechanism at one point and to the clamp pushing drive mechanism at another point, and there is a distance between the one point and the other point; under the action of the actuator, the switching mechanism successively drives the clamp feeding drive mechanism and the jaw drive mechanism to move in a first direction, and at the same time drives the matching mechanism to move, thereby driving the clamp pushing drive mechanism to move in a second direction to store energy, the first direction is opposite to the second direction; the clamp pushing drive mechanism includes a third reset member, and the third reset member is used to store the energy; the actuator is released, and the clamp pushing drive mechanism advances under the action of the third reset member to move the remaining clamps in the clamp box forward one station; the motion trajectory of the switching mechanism is coaxial with the motion trajectory of the jaw drive mechanism.

[0014] Furthermore, 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 push-clamp driving mechanism; the motion trajectory of the first matching part is parallel to the motion trajectory of the jaw driving mechanism, and the motion trajectory of the second matching part is parallel to the motion trajectory of the jaw driving mechanism.

[0015] Furthermore, the clamp pushing proximal end driving member is movably located in the clamp delivering proximal end driving member, and the clamp delivering distal end driving member and the clamp pushing distal end driving member are located on both sides of the clamp box.

[0016] Furthermore, the jaw drive tube is sleeved on the clamp delivery proximal end drive component, and the clamp delivery proximal end drive component is sleeved on the clamp push proximal end drive component.

[0017] Compared with the prior art, the beneficial effects of the present invention are: different driving mechanisms are used to respectively execute the clamping action and the pushing action, which increases the design space and can realize more reliable and stable execution of the clamping action and the pushing action, and the clamping action is executed earlier than the 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 clamping forceps. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective schematic diagram of a clip applier provided by a first embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A front view of the clip applier is shown with a portion of the housing hidden;

[0020] Figure 3 yes Figure 1 A perspective view of the clip applier shown with a portion of the housing hidden;

[0021] Figure 4A yes Figure 1 A schematic diagram of the front structure of the clip of the clip applier shown;

[0022] Figure 4B yes Figure 1 A schematic side view of the structure of the clip of the clip applier shown;

[0023] Figure 5 yes Figure 1 An exploded perspective view of the jaw assembly and shaft assembly of the clip applier shown;

[0024] Figure 6 yes Figure 1 A schematic structural diagram of the jaw drive mechanism of the clip applier shown;

[0025] Figure 7 yes Figure 6 An exploded perspective view of a portion of the jaw drive mechanism shown;

[0026] Figure 8 yes Figure 1 A schematic structural diagram of a clip delivery drive mechanism of the clip applier shown;

[0027] Figure 9 yes Figure 8 An exploded perspective view of the clip delivery drive mechanism of the clip applier;

[0028] Figure 10 yes Figure 1 A front view of the clamp push rod and the adapter block of the clamp push drive mechanism of the clip applier shown;

[0029] Figure 11 yes Figure 10A perspective schematic diagram of a clamp push rod of a clamp push drive mechanism of the clip applier shown;

[0030] Figures 12 to 14 yes Figure 1 A schematic diagram of state changes of the transmission mechanism of the clip applier shown;

[0031] Figure 15A yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly at MM with the wrench of the clip applier shown in the open position;

[0032] Figure 15B yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly taken at LL with the clip applier handle shown in the open position;

[0033] Figure 16A yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly at MM with the wrench of the clip applier shown in the neutral position;

[0034] Figure 16B yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly taken at LL with the clip applier wrench shown in a neutral position;

[0035] Figure 17A yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly taken at MM with the clip applier handle shown in the closed position;

[0036] Figure 17B yes Figure 1 A cross-sectional view of the jaw assembly and shaft assembly taken along line LL of the clip applier shown with the wrench in the closed position;

[0037] Figure 18 yes Figure 1 An exploded perspective view of a portion of the switching mechanism of the clip applier shown;

[0038] Figure 19 yes Figure 1 Another perspective exploded view of a portion of the switching mechanism of the clip applier shown;

[0039] Figure 20 yes Figure 1 A schematic structural diagram of the transmission mechanism of the knob assembly portion of the clip applier shown;

[0040] Figure 21 yes Figure 1 A schematic structural diagram of the coupling mechanism of the clip applier shown;

[0041] Figure 22 yes Figure 1 An exploded schematic diagram of the clip applier adapter block being assembled with the second adapter;

[0042] Figure 23A yes Figure 1 Schematic diagram of the movement process of the clip delivery block of the clip applier shown;

[0043] Figure 23B yes Figure 23A Schematic diagram of the motion trajectory of the clip delivery block of the clip applier shown;

[0044] Figure 24A yes Figure 1 Schematic diagram of the movement process of the clamp pushing block of the clip applier shown;

[0045] Figure 24B yes Figure 24A The schematic diagram of the motion trajectory of the clamp pushing block of the clip applier shown;

[0046] Figure 25 yes Figure 2 A schematic structural diagram of a wrench of the clip applier shown;

[0047] Figure 26 yes Figure 25 A schematic diagram of the structure of the guide channel of the wrench of the clip applier shown;

[0048] Figure 27 yes Figure 2 A schematic structural diagram of a guide pivot member of the clip applier shown;

[0049] Figure 28 yes Figure 2 A schematic diagram of the assembly of the guide pivot member and the wrench locking spring element of the clip applier shown;

[0050] Figure 29 yes Figure 2 A schematic structural diagram of a path switching member of a clip applier is shown;

[0051] Figure 30 yes Figure 1 A schematic diagram of the internal structure of a portion of the housing of the clip applier is shown;

[0052] Figure 31A yes Figure 2 A diagram showing a state of a wrench locking mechanism of the clip applier when the wrench is in an open position;

[0053] Figure 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;

[0054] Figure 31C yes Figure 2 A diagram showing a state of a wrench locking mechanism when the wrench of the clip applier is in a closed position;

[0055] Figure 31D yes Figure 2 The state diagram of the wrench locking mechanism of the clip applier shown is when the wrench of the clip applier is reset to the middle position;

[0056] Figure 32 yes Figure 1 A cross-sectional view of the clip applier shown from a perspective of the path switch;

[0057] Figure 33A yes Figure 1 A state diagram of the path switching member when the wrench of the clip applier is in the open position;

[0058] Figure 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;

[0059] Figure 33C yes Figure 1 A state diagram of the path switching member when the wrench of the clip applier is in the closed position;

[0060] Figure 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;

[0061] Figure 34 yes Figure 1 A schematic structural diagram of the jaw assembly of the clip applier shown;

[0062] Figure 35 yes Figure 34 A schematic structural diagram of the first clamping arm or the second clamping arm of the jaw assembly shown;

[0063] Figure 36 yes Figure 34 a cross-sectional view of the jaw assembly from one perspective;

[0064] Figure 37 yes Figure 34 A schematic diagram of the structure of the stopper and the clamp of the jaw assembly shown;

[0065] Figure 38 yes Figure 34 A schematic structural diagram of a stopper of the jaw assembly shown;

[0066] Figure 39 yes Figure 34 A cross-sectional view of the jaw assembly from another perspective;

[0067] Figure 40 yes Figure 34 A cross-sectional view of the jaw assembly assembly shown;

[0068] Figure 41 yes Figure 34 A schematic diagram of the jaw assembly shown in a closed position;

[0069] Figure 42 yes Figure 34 A schematic diagram of the jaw assembly shown in an open position;

[0070] Figures 43 to 45 1 is a schematic diagram of the state changes of a portion of the transmission mechanism of the clip applier provided by the second embodiment of the present invention;

[0071] Figure 46 is an exploded perspective view of a portion of a switching mechanism of a clip applier provided in a third embodiment of the present invention;

[0072] Figures 47 to 50 is a schematic diagram of state changes of a portion of a transmission mechanism of a surgical instrument provided by a third embodiment of the present invention;

[0073] Figure 51 is an exploded perspective view of a switching mechanism of a clip applier provided in a fourth embodiment of the present invention;

[0074] Figures 52 to 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

[0075] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present 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.

[0076] The user of the surgical instrument may be a clinician who operates the surgical instrument during surgery. 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, while the terms "distal" and "front" refer to the part relatively far away 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 only, e.g., the jaw assembly is on the "left" and the cannula 210 is on the "right." The terms "upper" and "lower" are used with reference to the relative positions of the upper and lower jaws of the jaw assembly; specifically, the upper jaw is "upper" and the lower jaw is "lower." It should be understood that the positions "proximal," "posterior," "distal," "anterior," "left," "right," "upper," and "lower" are defined for ease of description; however, surgical instruments can be used in many orientations and positions, and therefore, these terms expressing relative positional relationships are not intended to be limiting or absolute.

[0077] 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, or 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 the specific circumstances. It should be noted that when there are qualifiers before "connected" and "connection", they have the meaning 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.

[0078] The embodiments described below with reference to the accompanying drawings are exemplary and intended 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.

[0079] Figures 1 to 42 The present invention shows a surgical instrument according to a first embodiment, 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. In terms of overall positional relationship, the clamping forceps includes an operating assembly 300, a shaft assembly 200200 extending from the operating assembly 300, and a jaw assembly provided at one end of the shaft assembly 200200. In order to continuously apply multiple clips, the clamping forceps needs to perform three actions: a clamp feeding action, a jaw closing action (clamping action), and a clamp pushing action, and the clamp feeding 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.

[0080] 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, and the wrench is movably connected to the housing 321. The housing 321 is positionally divided into a head housing 321, which is generally spindle-shaped and cylindrical, and a handle housing 321 extending from the underside of the head housing 321. The handle housing 321 and the wrench constitute a handle assembly. The user can grasp the handle housing 321 with one hand and pull the wrench with their fingers to move the wrench relative to the main body 320. The clip applier also includes a transmission mechanism, part of which is housed within the housing 321 of the operating assembly 300, and part of which is located in the shaft assembly 200200.

[0081] 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.

[0082] like Figures 4A-4B As shown, the clip 10 of the clip applier forceps includes a first clamp arm 31, a second clamp arm 32, and a connecting portion 33. The connecting portion 33 is located between the first clamp arm 31 and the second clamp arm 32, and the two clamp arms can pivot relative to each other about the connecting portion 33. The first clamp arm 31 includes two first protrusions 41, and the second clamp arm 32 includes two second protrusions 42. The first clamp arm 31 also includes a first engaging portion 35, and the second clamp arm 32 also includes a second engaging portion 36. Driven by an external force, the first clamp arm 31 and the second clamp arm 32 of the clip 10 approach each other, and the first engaging portion 35 eventually engages with the second engaging portion 36 of the second clamp arm, thereby fixing the first clamp arm 31 and the second clamp arm 32 to each other and clamping the tissue located between the first clamp arm 31 and the second clamp arm 32. At this time, the first clamp arm 31 and the second clamp 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 / locked state when they are engaged with each other, and as being in an open state when they are disengaged from each other. The first engaging portion 35 is a pointed portion provided at the distal end of the first clamping arm 31, and the second engaging portion 36 is a curved C-shaped hook provided at the distal end of the second clamping arm 32.

[0083] The jaw assembly includes a first arm 31 and a second arm 32 pivotally connected to the shaft assembly 200, 200, respectively. A clip 10 is supported between the first arm 31 and the second arm 32, allowing the jaw assembly to switch between an open and closed state. In the open state, the jaw assembly clamps an open clip. Due to structural limitations, the jaw assembly cannot open indefinitely. The open state of the jaw assembly includes a fully open state, in which the vertical distance between the distal ends of the first arm 31 and the distal ends of the first arm 32 is at its maximum. In the closed state, the vertical distance between the distal ends of the first arm 31 and the second arm 32 is at its minimum. Closing the jaw assembly causes the clip 10 to transition from the open state to the closed state. The proximal jaw drive member drives the sleeve 210 (distal jaw drive member) forward and backward. The specific method is described below regarding the movement of the jaw drive mechanism. The sleeve 210 moves forward to cause the jaw assembly to close and the first and second arms to compress the clamp therein, and the sleeve 210 moves backward to cause the jaw assembly to open and the jaw assembly to open.

[0084] The shaft assembly 200200 includes a clamping box 220, a base 240, a clamp feeding assembly, a clamp pushing assembly, and a sleeve 210 sleeved on the clamping box 220, the clamp feeding assembly, and the clamp pushing assembly. The clamp feeding assembly belongs to the clamp feeding drive mechanism, the clamp pushing assembly belongs to the clamp pushing drive mechanism, and the sleeve 210 belongs to the jaw drive mechanism.

[0085] The first (distal) end of the cartridge 220 is connected to the jaw assembly, and the second (proximal) end, opposite the first end, is fixedly connected to the main body 320. The cartridge 220 can accommodate up to M clips, where M is greater than or equal to 2 and is related to the size of the cartridge 220. After the clip applier is used once, the number of clips in the cartridge 220 decreases by one. When the cartridge 220 contains N clips, where N is less than or equal to M, the N clips are arranged sequentially 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 the first to be introduced into the jaw assembly. Clips other than the first clip in the cartridge 220 are defined as "other clips." The cartridge 220 contains M workstations, arranged from the distal end to the proximal end, namely the first workstation, the second workstation, ..., the Mth workstation. The first clip is located at the frontmost workstation, and the second through Nth clips are arranged sequentially from the second to the Nth workstations.

[0086] The clamping box 220 has a bottom wall 221 with a plurality of transverse barbs 225 formed along its length. These barbs 225 are arranged evenly spaced and have angled distal ends. When the clamp moves forward axially, it slides against the front transverse barb 225, causing it to bend toward the bottom wall 221 and pass through it, allowing the clamp to move from one station to the next. The angled distal ends of the barbs 225 abut against the rear side of the clamp, preventing it from moving backward, thereby preventing it from moving from one station to the next. This indicates that the barbs 225 provide a one-way locking function, preventing the clamp from moving backward between adjacent stations.

[0087] 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 engages a first protrusion 41 behind the clip, the second transverse barb 225 engages a second protrusion 42 on the same side of the same clip behind the clip, thereby preventing the clip from moving from the current workstation to the adjacent rear-end workstation in the clip magazine 220. In this embodiment, a plurality of first transverse barbs 225 and a plurality of second transverse barbs 225 are arranged in two rows on both sides of the width of the bottom wall 221, with adjacent transverse barbs 225 in each row being equidistant in the axial direction.

[0088] 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, the specific details of which are as follows.

[0089] When the clamp is in the 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, 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 assembly and the forward length of the clamp pushing assembly do not need to be equal. The size design of the jaw assembly and the size design of the clamp box 220 can be independent of each other, providing design space for independently optimizing the structure of the jaw assembly and the clamp box 220 structure, and also providing design space for optimizing the structure of the clamp pushing assembly and the clamp feeding assembly themselves. The clamping forceps have a simple structure and a more compact size.

[0090] In the prior art, an integrated pushing piece is used, and the clamp feeding piece and the clamp pushing piece must be sheet-shaped, otherwise the clamp feeding piece and the clamp pushing piece 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 as 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 piece that pushes and feeds clamps synchronously, 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, and 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 this 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.

[0091] The first clamp arm and the second clamp arm each 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 the 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 forms a first clamping surface, and the second side surface forms a second clamping surface. The area between the first clamping surface and the second clamping surface is 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.

[0092] In this embodiment, when the clip is installed in the clip box 220, the two clip arms are respectively pressed against the first side wall 222 and the second side wall 223 and compressed, but not compressed to a closed state. The clamping plane is parallel to the bottom wall 221, and the multiple clamping surfaces of the multiple clips are in the same plane. In other embodiments, the multiple clips can be arranged at an angle in the clip box 220, so that the clamping surfaces of the multiple clips are not in the same plane, but the clamping surfaces of the multiple clips are parallel to each other. The clip feeding assembly and the clip pushing assembly are still arranged on the first side and the second side of each clamping surface.

[0093] The clamping box 220 includes a bottom wall 221 extending in its longitudinal direction, and opposing first and second side walls 222 and 223, forming a generally C-shaped structure. When the clamping box 220 accommodates a clamp, the clamp's clamping surface is parallel to the bottom wall 221. The clamp feeding assembly is located on the outside of the bottom wall 221 of the clamping box 220, while the clamp pushing assembly is located on the inside of the bottom wall 221 of the clamping box 220. In this way, the clamp feeding assembly and the clamp pushing assembly independently push the first clamp and other clamps from both sides of the clamping box 220, fully utilizing the space within the sleeve 210 and on both sides of the clamping box 220. This increases the design freedom of the clamp pushing assembly and the clamp feeding assembly, and makes the clamp applier structure more stable and compact. The inside and outside of the bottom wall 221 refer to the two sides of the plane in which the bottom wall 221 is located, and the clamp, first and second side walls 222 and 223 are located on the inside of the bottom wall 221.

[0094] The bottom wall 221 of the cartridge 220 has an opening located near the distal end of the bottom wall 221. The clip feed assembly enters the cartridge 220 through the opening and is positioned between the first and second clips. This opening ensures that the clip feed assembly can smoothly enter and exit the cartridge 220 and enter between the first and second clips, thereby abutting the first clip at its rear end to propel it forward. Preferably, a portion of the opening is located at the first station, and another portion is located at the second station.

[0095] The clamp feeding assembly includes an elastic push rod 232 and a clamp feeding block 231 connected to one end of the elastic push rod 232. The clamp feeding block 231 is used to abut and push the first clamp. The base 240 is provided with a channel for accommodating the clamp feeding assembly and allowing for axial movement thereof. The channel includes an axially extending guide groove 241 and a block groove 242 connected to the guide groove 241. The block groove 242 includes a guide bevel 498243, which is arranged at an angle to the axial direction. Specifically, when the base 240 and the clamp cartridge 220 are installed together, the guide bevel 498243 is inclined toward the distal end and toward the clamp cartridge 220. The elastic push rod 232 is composed of multiple laminated metal sheets and is elastic and bendable. Initially, the clamping block 231 and the elastic push rod 232 are axially parallel, the guide groove 241 accommodates the elastic push rod 232, and the block groove 242 accommodates the clamping block 231. The guide groove 241 guides the elastic push rod 232 to move axially, and the guide slope 498243 guides the clamping block 231 into the opening. Specifically, when the elastic push rod 232 moves axially forward along the guide groove 241, the front end of the clamping block 231 abuts the guide slope 498243, and the elastic push rod 232 begins to bend, and the clamping block 231 obliquely enters the opening of the cartridge 220 along the guide slope 498243, thereby abutting the first clamp at the rear end thereof to push it forward. 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 clamp feeding assembly, ensuring that the clamp feeding 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 excessively bending or even bending during movement, thereby blocking it in the sleeve 210 and affecting the clamp feeding function. Compared with the inclined clamp feeding piece in the prior art, the rigid guide bevel 498243 ensures the stability of the movement of the clamp feeding 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 in the clamp box 220, the guide bevel 498 is connected to the first bottom wall 221a221. The guide slope 498 is directly connected to the first bottom wall 221a221, with essentially no gap, ensuring that the clamping block 231 can enter the opening unimpeded and avoids accidental entrapment. The thickness of the clamping block 231 is greater than that of the elastic push rod 232. The elastic push rod 232 utilizes a thin and flexible structure, ensuring that it can bend along the guide slope 498243, allowing the clamping block 231 to move along the guide slope 498243.The greater thickness of the clamping block 231 provides greater strength and is less susceptible to deformation. Furthermore, due to its greater thickness, the clamping block 231 forms a first abutting surface 486 at its distal end that contacts the clamp. 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 separate components that can be fixed by welding.

[0096] The clamp feeding assembly further includes an axially extending clamp feeding rod 233, one end of which is connected to the elastic push rod 232 and the other end is connected to the operating assembly 300. The guide groove 241 accommodates the clamp feeding rod 233. The operating assembly 300 drives the clamp feeding rod 233 to move axially, thereby driving the elastic push rod 232 and the clamp feeding block 231 to move together. The clamp feeding rod 233 is a cylindrical rod or a square rod or similar structure. Unlike the elastic elastic push rod 232, the clamp feeding rod 233 is rigid and not easily deformed. This prevents the elastic push rod 232 from easily bending in the guide groove 241 during axial movement, thereby preventing the clamp feeding assembly from being blocked, thereby improving the stability of the clamp feeding assembly movement.

[0097] The guide groove 241 of the base 240 also accommodates the clamp feed rod 233 and guides the clamp feed rod 233 in axial movement. The clamp feed 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 clamp feed rod 233. The clamp push assembly is a clamp push seat 250, which includes a clamp push block 253, an elastic member 254, and a clamp push rod 251. The clamp push rod 251 is provided with a side cavity 252. The side cavity 252 or the clamp push block 253 is provided with a rotating shaft 255. The clamp push block 253 is rotatably mounted in the side cavity 252 via the rotating shaft 255. The clamping block 253 includes an abutting end that can abut and push the clip forward. The abutting end is disposed at the distal end of the clamping block 253. An elastic member 254 is connected to the clamping block 253 at one end and to the clamping rod 251 at the other end. The elastic member 254 provides a force for the clamping block 253 to rotate outward from the side cavity 252, specifically causing the abutting end of the clamping block 253 to tilt toward the clip. In this embodiment, corresponding to the plurality of workstations, the clamping rod 251 is provided with a plurality of side cavities 252 at intervals. 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 plurality of 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 dragging the clip backward when retreating. The clamping block 253 has a certain thickness, so that the abutting end of the clamping block 253 forms a second abutting surface 486 with a certain area, ensuring the stability of the abutment with the clamp. The abutting end can also be configured as a recessed portion, into which the clamp arm fits, further enhancing the stability of the abutment. The clamping assembly is the clamping distal end driver of the present invention.

[0098] The first side wall 222 and the second side wall 223 of the clamp box 220 are respectively provided with a protruding first clamping strip and a second clamping strip, and the upper and lower surfaces of the clamp pushing rod 251 of the clamp pushing seat 250 are respectively provided with a first clamping groove and a second clamping groove that cooperate with the first clamping strip and the second clamping strip, so that the clamp pushing seat 250 can be installed in the clamp box 220 in a slidable manner.

[0099] Furthermore, the operating assembly 300 also includes a coupling mechanism, and 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, and the clamp pushing assembly is linked to the second coupling member. 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 coupling mechanism's linkage with the clamp feeding assembly and the clamp pushing assembly are described in detail below, and the benefits are the same as those shown below, so they will not be repeated here.

[0100] In this embodiment, the transmission mechanism includes a clip feed drive mechanism and a jaw drive mechanism. The clip feed drive mechanism is used to drive the clip into the jaw assembly, and the jaw drive mechanism is used to drive the jaw assembly to move. The transmission mechanism also includes a switching mechanism for selectively driving the clip feed drive mechanism or the jaw drive mechanism. The transmission mechanism includes a first state and a second state. In the first state, the switching mechanism is separated from the jaw drive mechanism and coupled with the clip feed drive mechanism to drive the clip feed drive mechanism to move. In the second state, the switching mechanism is separated from the clip feed drive mechanism and coupled with the jaw drive mechanism to drive the jaw drive mechanism to move. In this embodiment, when the switching mechanism drives the clip feed drive mechanism to move, the jaw drive mechanism is not driven and is in a stationary state. When the switching mechanism is separated from the clip feed drive mechanism, the clip feed drive mechanism no longer advances, and the switching mechanism is coupled with the jaw drive mechanism to drive the jaw drive mechanism to move. During this process, energy is selectively transferred to either the clip feed drive mechanism or the jaw drive mechanism. Therefore, energy consumption is reduced, and the force required by the physician to operate the actuator 330 is correspondingly reduced, resulting in more comfortable operation, better operation of the clip applier, and an enhanced 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.

[0101] The switching mechanism includes a first clutch mechanism and a second clutch mechanism. The first clutch mechanism is connected to the second clutch mechanism. When the switching mechanism moves under the action of the actuator 330, the first clutch mechanism and the second clutch mechanism move together. In a first state, the first clutch mechanism is coupled to the clamp feed drive mechanism to drive the clamp feed drive mechanism, while the second clutch mechanism is separated from the jaw drive mechanism. In a second state, the first clutch mechanism is separated from the clamp feed drive mechanism, while the second clutch mechanism is coupled to the jaw drive mechanism to drive the jaw drive mechanism. 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 coupled to the clamp feed drive mechanism. In the second state, the first clutch member is separated from the clamp feed drive mechanism. The second clutch mechanism includes a second clutch member, which is coupled to the first clutch mechanism. To simplify and compact the switching mechanism, the second clutch member is a distal end of the first clutch mechanism, specifically, a 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 engaged 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 from its distal end, and the proximal end of the jaw drive mechanism is provided with a groove 314 that matches the hook. In the first state, the hook is not inserted into the groove 314 of the jaw drive mechanism. 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.

[0102] 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 coupled state to a separated state. Specifically, the moving part is a guide post 490 connected to the first clutch, and the moving guide is a guide rail provided in the shell 321, and the guide post 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 post 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 that is higher than the first guide surface 494. The guide post 490 is located on the first guide surface 494 in the first position and on the second guide surface 496 in the second position. The first guide surface 494 is smoothly connected to the second guide surface 496 via an inclined surface 498, which facilitates smoother movement of the moving part. The guide post 490 can follow the movement of the first clutch member and move on the guide rail. When the guide post 490 moves on the first guide surface 494, the first clutch member remains engaged with the clamp feed drive mechanism. Because the guide rails provided in the housing 321 have different heights, when the moving part moves onto the second guide surface 496 of the guide rail, it drives the first clutch member to move upward until it is separated from the clamp feed drive mechanism. When the first clutch member is separated from the clamp feed drive mechanism, the distal end of the first clutch mechanism engages with the proximal end of the jaw drive mechanism to drive the jaw drive mechanism to move. The advantages of this arrangement 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 shell 321, with a compact structure; on the other hand, it has low power consumption and smooth and labor-saving operation.

[0103] The switching mechanism comprises a switching mechanism body 320. To achieve a more compact overall structure, fully utilize the space within the clip applier, and ensure smoother movement, a portion of the first clutch mechanism is housed within this body 320. Specifically, this body 320 includes a proximal surface 502, a distal surface 508, a first through-hole 404510 extending through the proximal and distal surfaces 502 and 508, and a second through-hole 404512 extending through the upper surface of the switching mechanism and the upper curved surface of the first through-hole 404510. The first through-hole 404510 allows for passage of the clip feed drive mechanism, while the second through-hole 404512 accommodates the first clutch member. The second clutch member is the distal end of the switching mechanism body 320, which, as described above, can be the distal surface 508. 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 mated with the proximal end of the jaw drive mechanism. The first clutch member includes a clamping block 482 received in the second through hole 404512. The clamp feed drive mechanism includes a clamping slot, and the clamping block 482 cooperates with the clamping slot to couple the first clutch member to the clamp feed drive mechanism. The clamping block 482 includes a first end and a second end extending perpendicularly from the first end in a longitudinal direction; the first end is connected to the guide post 490, and the second end is detachably connected to the clamping slot. The first clutch member also includes an elastic element, such as a spring. In the first state, the elastic element applies a downward force to the clamping block 482, causing the clamping block 482 to abut against the clamping slot, thereby enabling the first clutch member to be well coupled to the clamp feed drive mechanism and improving the stability of the clamp feed action. In this embodiment, to make the overall structure simpler and more compact, the clamping groove is an annular groove 438 provided on the outer peripheral surface of the proximal end of the clamp feeding drive mechanism. The second end of the clamping block 482 includes an arcuate surface 484 that matches the bottom surface of the annular groove 438, and an abutting surface 486 connected to the arcuate surface 484. The abutting surface 486 abuts the end surface of the annular groove 438. The engagement of the arcuate surface 484 with the bottom surface of the annular groove 438, and the engagement of the abutting surface 486 with the end surface of the annular groove 438, enables the clamping block 482 to better push the clamp feeding drive mechanism. Of course, in other embodiments, the first clutch member may also include a groove 314, and the clamp feeding drive member may include a protrusion 440 that matches the groove 314.

[0104] In this embodiment, the switching mechanism is arranged on the clamp feeding drive mechanism. In the first state, the switching mechanism and the jaw driving mechanism are spaced apart. Under the action of external force, the clamp feeding drive mechanism is pushed forward, 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 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.

[0105] The actuator 330 is used to provide power to the transmission mechanism. Specifically, the actuator 330 abuts the switching mechanism, thereby driving the switching mechanism to move. The switching mechanism then transmits this power to either the clamp feed drive mechanism or the jaw drive mechanism. The proximal end of the switching mechanism has a driving surface 504 and a stopper 506. The driving surface 504 abuts the actuator 330 to receive the power, and the stopper 506 is used to limit the position of the actuator 330. The driving surface 504 is a recessed surface formed by the stopper 506 and the surface of the switching mechanism, and the head of the actuator 330 abuts this recessed surface. To ensure that the force applied by the actuator 330 to the switching mechanism is more uniform and promotes smooth movement, the stopper 506 is symmetrically positioned on either side of the proximal end of the switching mechanism in its direction of travel. Accordingly, the actuator 330 has a gripping portion and symmetrically arranged push claws extending from the gripping portion into the interior of the housing 321. The two push claws abut the driving surface 504 on either side of the switching mechanism. The stop portion 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 that match the stop portion 506. The stop portion 506 can move in the longitudinal direction in the guide groove, and the guide groove can limit the height direction of the stop portion 506. This can effectively reduce the shaking of the switching mechanism during movement, making the transmission more stable and reliable.

[0106] The clip applier further includes a clip delivery and retraction prevention mechanism, which includes a bias spring and a guide pivot member 350. The guide pivot member 350 is a guide pivot member 350 described below and includes a retraction prevention end 354. The guide pivot member 350 includes a pivot end 352 pivotally connected to the housing 321, and a guide member 351 and a retraction prevention end 354 extending outward from the pivot end 352. The guide member 351 is movably connected to the actuator 330. Movement of the actuator 330 drives the guide member 351 and the retraction prevention end 354 to move about the pivot end 334 under the action of the bias spring. In a first state, the retraction prevention end 354 gradually approaches the proximal end of the clip delivery drive mechanism. In a second state, the retraction prevention end 354 abuts the proximal end of the clip delivery drive mechanism to prevent the clip delivery drive mechanism from retracting.

[0107] The clamp feed stop mechanism can move its stop end 354 to the proximal end of the clamp feed drive mechanism at the moment the switching mechanism is separated from the clamp feed drive mechanism, and abut against the clamp feed drive mechanism to prevent the clamp feed drive mechanism from retreating. However, to prevent the clamp feed stop mechanism from being unable to abut against the clamp feed drive mechanism due to component dimensional deviation, motion error, etc., thereby causing the clamp to retreat, the stop end 354 of the clamp feed stop mechanism can move to the proximal end of the clamp feed drive mechanism before the switching mechanism is separated from the clamp feed drive mechanism. After the switching mechanism is separated from the clamp feed drive mechanism, the clamp feed drive mechanism retreats a short distance under the action of the first reset member 418 until it abuts against the stop end 354 of the clamp feed stop mechanism, thereby preventing the clamp feed drive mechanism from retreating further and causing the clamp to retreat. Since the elastic push rod 232 of the clamp feeding drive mechanism is elastic and is compressed when the clamp feeding drive mechanism moves forward, the elastic push rod 232 gradually recovers its deformation when the clamp feeding drive mechanism retreats a short distance under the action of the first reset member 418. At this time, the clamp feeding block 231 still presses against the clamp, so the clamp will not retreat when the clamp feeding drive mechanism retreats a short distance.

[0108] 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 presence of the clamp delivery and retraction prevention mechanism can prevent the clamp located in the jaw assembly from retracting and causing the clamp to be unable to clamp the blood vessel or tissue, thereby improving the reliability and safety of the operation. A more detailed description of the actuator 330 will be expanded later.

[0109] The jaw drive mechanism includes a proximal jaw drive member and a distal jaw drive member connected to the proximal jaw drive member. In the second state, the switching mechanism drives the proximal jaw drive member, which in turn drives the distal jaw drive member. In this embodiment, the proximal jaw drive member is a jaw drive tube 432, and the distal jaw drive member is a sleeve 210. The sleeve 210 is connected to the jaw drive tube 432 at one end and engages with the jaw assembly at the other end. In the second state, the switching mechanism engages with the jaw drive tube 432 to drive the jaw drive tube 432, which in turn drives the sleeve 210 to close the jaw assembly. Ribs 436 are spaced apart on the distal inner wall of the jaw drive tube 432. Adjacent ribs 436 and the inner wall of the jaw drive tube 432 form annular grooves 438. An annular plate 442 is provided on the proximal outer periphery of the sleeve 210. This annular plate 442 fits into the annular groove 438, with the ribs 436 abutting against the annular plate 442. The annular plate 442 is symmetrically provided with recesses 444 circumferentially. A protrusion 440 is provided within the annular groove 438 to match the recesses 444. The protrusion 440, in combination with the recess 444, secures the sleeve 210 in place and secures it within 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 over the jaw drive tube 432, with one end abutting against a baffle 434 on the outer surface of the jaw drive tube 432 and the other end extending forward to abut against the inner wall of the clip applier housing 321. The elastic element is used to store energy when the jaw drive mechanism advances, and releases this energy when it recovers its shape, thereby providing power for the jaw drive mechanism to return to its original position.

[0110] The clamp feeding drive mechanism includes a proximal clamp feeding drive member and a distal clamp feeding drive member connected to the proximal clamp feeding drive member; when the switching mechanism is in the first state, the proximal clamp feeding drive member is driven to move, thereby driving the distal clamp feeding drive member to move. The distal clamp feeding drive member includes a base 240 and a clamp feeding assembly, and a channel is provided in the base 240; when the switching mechanism is in the first state, the proximal clamp feeding drive member is combined with the proximal clamp feeding drive member to drive the proximal clamp feeding drive member to move, thereby driving the clamp feeding assembly to move in the channel, thereby driving the clamp to enter the jaw assembly. More specifically, a guide slope 498243 is provided at the distal end of the channel, and the proximal clamp feeding drive member drives the clamp feeding assembly to move in the channel and moves through the guide slope 498243 to abut against the first clamp in the clamp box 220, thereby driving the first clamp to enter the jaw assembly. In this embodiment, the proximal clamp delivery drive member is a clamp delivery drive tube 402, which is fixedly connected to the clamp delivery assembly. The clamp delivery drive tube 402 is partially located within the jaw drive tube 432 and is capable of moving within the jaw drive tube 432. The base 240 is located outside the cartridge 220, with a first end fixedly connected to the housing 321 and located within the clamp delivery drive tube 402. The second end extends from the first end to the distal end and is fixedly connected to a tab on the outside of the cartridge 220 via a pin 316. The clamp feeding assembly includes a clamp feeding rod 233, an elastic push rod 232 and a clamp feeding block 231 connected in sequence. Specifically, the proximal end of the clamp feeding rod 233 has a bent portion 406, and the distal end of the clamp feeding drive tube 402 has a hole 404 that matches the bent portion 406 for accommodating the bent portion 406 of the clamp feeding rod 233. The bent portion 406 at the proximal end of the clamp feeding rod 233 passes through the proximal end of the channel of the base 240 and is installed in the hole 404 at the distal end of the clamp feeding drive tube 402 that matches the bent portion 406. The distal end of the clamping 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 connect the elastic push rod 232 with the clamping rod 233. The distal end of the elastic push rod 232 has an arcuate recess 412, and the lug 414 at the proximal end of the clamping block 231 cooperates with the arcuate recess 412 to connect the elastic push rod 232 with the clamping head. The channel of the base 240 provides space for accommodating the clamping assembly on the one hand, and also facilitates the movement of the clamping assembly in the channel on the other hand. The clamping drive tube 402 drives the clamping block 231 to move in the channel and move through the guide slope 498243 until it abuts against the clamp, thereby driving the clamp into the jaw assembly. 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, each of which is composed of multiple stacked pieces. The elastic push rod 232 itself is elastic and can deform and bend, thereby enabling the clip delivery block 231 to deliver the clip into place. The corresponding structures of the clip delivery block 231, the clip, and the clip box 220 are described in detail above and 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 near 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 the reset of the clamp delivery drive mechanism.

[0111] The clip applier also includes a knob 310, wherein the proximal end of the knob 310 has a protrusion 312. The distal end of the operating assembly 300 is provided with a recessed portion that matches the protrusion 312. The recessed portion and the protrusion 312 cooperate with each other to assemble the knob 310 and the operating assembly 300 together. A pin 316 is provided in the knob 310. 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. The pin 316 and the first pin hole 416 404 cooperate to securely mount the base 240 and the knob 310. The proximal end of the cartridge 220 is also housed within the clip delivery drive tube 402 and is provided with a second pin hole 404. The pin 316 cooperates with the second pin hole 404 to securely attach the cartridge 220 to the knob 310. One end of the pin 316 is mounted at a first location on the sidewall of the knob 310, while the other end passes through the second waist-shaped hole 404, the first pin hole 416, the second pin hole 404, and the first waist-shaped hole 420, and is then mounted at another location on the sidewall of the knob 310 symmetrical to the first location. Rotating the knob 310 drives the jaw drive tube 432, the clip delivery drive tube 402, the base 240, and the cartridge 220, thereby driving the cannula 210, the jaw assembly, and the clip delivery assembly to rotate, allowing the physician to adjust the angle to a suitable clamping angle for the blood vessel or tissue. Furthermore, the presence of the first and second kidney-shaped holes 420, 404, 448 prevents the forward movement of the clip-feeding drive tube 402 and the jaw-feeding drive tube 432 from being affected by the pin 316. The knob 310 drives the clip-feeding drive mechanism and the jaw-feeding drive mechanism to rotate 360 ​​degrees. To enhance the physician's feel when turning the knob 310 and ensure that it remains in its current position after rotation at any angle, facilitating operation, a damping member 318 is provided at the junction of the knob 310 and the handle assembly. More specifically, a groove 314 is provided on the outer periphery of the protruding portion 312 at the proximal end of the knob 310. The damping member 318 is internally received within the groove 314 and externally abuts against a recessed portion of the handle assembly. The friction between the damping member 318 and the handle assembly increases the force required to turn the knob 310 and ensures that it remains in its current position after rotation at any angle. The damping member 318 is a rubber ring.

[0112] The following is a detailed description of the working process of the clip applier of this embodiment to achieve clip delivery and jaw assembly closing:

[0113] The operator presses the actuator 330, causing it to move from the open position toward the intermediate position, thereby pushing the switching mechanism to drive the clip feed drive mechanism forward. The proximal end of the clip feed 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 intermediate position, the moving member of the switching mechanism moves onto the second guide surface 496 within the housing 321, disengaging the latching block 482 from the latching slot of the clip feed drive tube 402. The switching mechanism is separated from the clip feed drive mechanism, completing the forward stroke of the clip feed drive mechanism. The clip at the distal end of the clip cartridge 220 is delivered into the jaw assembly (the clip delivery action is completed), and the distal end surface 508 of the switching mechanism abuts the proximal end surface 502 of the jaw drive mechanism. After the switching mechanism is separated from the clip feed drive mechanism, the stop end 354 of the clip feed stop mechanism abuts the clip feed drive tube 402 to prevent the clip in the jaw assembly from retreating due to the retreat of the clip feed drive mechanism. The actuator 330 continues to be pressed, causing it to move from the intermediate position toward the closed position, gradually disengaging the clip delivery stop mechanism from the clip delivery drive tube 402. The switching mechanism, under the action of the actuator 330, pushes the jaw drive mechanism forward, and the jaw drive tube 432 drives the sleeve 210 forward to close the jaw assembly. When the actuator 330 is pressed and moved to the closed position, the jaw drive mechanism's forward stroke ends (the jaw closing action is complete), and the clip delivery stop mechanism completely disengages the clip delivery drive tube 402. The clip delivery drive tube 402 is then 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 retraction 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. On the other hand, after operating the clamp applier to complete the clamp delivery action, there is no need to keep pressing the actuator 330. The doctor can stop to find the blood vessel or tissue and then continue to operate the actuator 330 to perform the jaw closing action.

[0114] In this embodiment, the transmission mechanism further includes a push-clip drive mechanism. The transmission mechanism also includes a third state, optionally having a first state and a third state. In the first state, the clip delivery drive mechanism drives the farthest clip of the clip cartridge 220 forward into the jaw assembly. In the third state, the push-clip drive mechanism drives the remaining clips in the clip cartridge 220 forward one position. Here, the "farthest clip" refers to the aforementioned "first clip," and the "remaining clips" refer to the aforementioned "other clips." In this embodiment, the clip applier not only enables continuous clip application, but also, because the first and third states occur at different times, the clip delivery action of the clip delivery drive mechanism and the push-clip drive mechanism execute asynchronized clamping actions, effectively avoiding interference between the clip delivery and push-clip actions. Furthermore, because the clip delivery drive mechanism and the push-clip drive mechanism are independent drive mechanisms, design space is increased, and the structures of the clip delivery drive mechanism and the push-clip drive mechanism are stable and reliable. Therefore, the technical solution of this embodiment provides more stable and reliable clip delivery and push-clip actions, improving the safety of the clip applier.

[0115] In this embodiment, the transmission mechanism includes a driver and a coupling mechanism. The driver abuts against the actuator 330 to receive power. The coupling mechanism is connected to the driver at one point and to the clamp-pushing drive mechanism at another point, with a distance between one point and the other point of the coupling mechanism. The driver is used to drive the clip-feeding drive mechanism forward to push the clip at the farthest end of the cartridge 220 forward into the jaw assembly, and also to drive the coupling mechanism to move the clamp-pushing drive mechanism backward to store energy. The clamp-pushing drive mechanism includes a third reset element for storing this energy. Upon releasing this energy, the clamp-pushing drive mechanism advances under the action of the third reset element to move the remaining clips in the cartridge 220 forward one station. In other words, when the clamp-feeding drive mechanism advances via the coupling mechanism, the clamp-pushing drive mechanism retreats to store energy, resulting in asynchronous clip-feeding and clamp-pushing actions performed by the clamp-feeding drive mechanism. The driver is the aforementioned switching mechanism, which is used to selectively drive either the clip-feeding drive mechanism or the jaw drive mechanism. In the first state, the driving member is separated from the jaw drive mechanism and coupled with the clip feeding drive mechanism to drive the clip feeding drive mechanism forward, while driving the coupling mechanism to move the clip pushing drive mechanism backward to store a first energy. In the second state, the driving member is coupled with the jaw drive assembly to drive the jaw drive mechanism forward and separated from the clip feeding drive mechanism, while driving the coupling mechanism to move the clip pushing drive mechanism backward to store a second energy. The first energy and the second energy together constitute the aforementioned energy. In the third state, the clip pushing drive mechanism advances under the action of the energy to move the remaining clips in the clip cartridge 220 forward one station. In other words, the clip pushing drive mechanism is connected to the switching mechanism via the coupling mechanism, and the clip pushing drive mechanism moves in opposite directions to the switching mechanism. Under the action of the actuating member 330, the switching mechanism first separates from the jaw drive mechanism and couples with the clip feeding drive mechanism to drive the clip feeding drive mechanism forward to perform the clip feeding action. Thereafter, the switching mechanism separates from the clip feeding drive mechanism and couples with the jaw drive mechanism to drive the jaw drive mechanism forward to perform the jaw closing action. When the switching mechanism drives the clamp feed drive mechanism and the jaw drive mechanism forward, it simultaneously drives the coupling mechanism to move the clamp push mechanism backward and store energy. When the actuator 330 is released, the clamp push mechanism advances under the action of the third reset member to perform the clamp push action. How the switching mechanism achieves engagement and disengagement with the clamp feed drive mechanism and the jaw drive mechanism has been described above and will not be repeated here.

[0116] In another embodiment, the drive member lacks a clutch function and is connected to the clip feed drive mechanism and the clip push drive mechanism, respectively. The actuator 330 includes a first actuator 330 and a second actuator 330. The first actuator 330 abuts the drive member, while the second actuator 330 abuts the jaw drive mechanism. In a first state, the drive member, under the action of the first actuator 330, drives the clip feed drive mechanism forward to advance the clip at the farthest end of the cartridge 220 into the jaw assembly. Simultaneously, it drives the mating mechanism to move the clip push drive mechanism backward to store energy. The clip push drive mechanism includes a third reset element for storing this energy. In a third state, the first actuator 330 is released, and the clip push drive mechanism, under the action of the third reset element, advances to advance the remaining clips in the cartridge 220 by one position. After the first actuator 330 is released, the second actuator 330 is pressed to drive the jaw drive assembly to close the jaw assembly. Of course, before releasing the first actuator 330 and after the clamp feeding 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, so that the clamp pushing drive mechanism moves forward under the action of the above-mentioned third reset member to move the remaining clamps in the clamp box 220 forward one station.

[0117] The jaw drive mechanism is sleeved on the clamp feeding drive mechanism. In a first state, the proximal end surface 502 of the clamp feeding 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 a second state, the proximal end surface 502 of the jaw drive mechanism gradually moves away from the proximal end surface 502 of the clamp feeding drive mechanism, and the distal end surface 508 of the driving member abuts the proximal end surface 502 of the jaw drive mechanism. The structure and positional relationship of the jaw drive mechanism and the clamp feeding drive mechanism are described above and will not be repeated here.

[0118] The coupling mechanism includes a first coupling member, an intermediate member, and a second coupling member. The first coupling member is connected to the aforementioned drive member, while the second coupling member is connected to the push-and-clamp drive mechanism. The first coupling member drives the second coupling member through the intermediate member in a direction opposite to the second coupling member's movement. The drive member drives the first coupling member forward. As the first coupling member advances, the second coupling member retracts, driving the push-and-clamp drive mechanism backward. The coupling mechanism's structure will be described in detail below.

[0119] The push-clip drive mechanism also includes a push-clip drive member. The push-clip drive 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 is understandable that the third reset member can also be directly connected to the push-clip drive member. 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 spaced apart along the longitudinal direction, each of which is correspondingly provided with a push-clip block 253. Under the action of the third reset member, the push-clip drive member drives the push-clip block 253 to move the remaining clips in the clip box 220 forward one station. More specifically, the push-clip drive member includes a push-clip proximal drive member and a push-clip distal drive member. The push-clip distal drive member herein is the aforementioned push-clip assembly or push-clip seat 250. The third reset member can be an elastic element, such as a spring. In this embodiment, the proximal push-clamp driver is a coupling block 452, and the distal push-clamp driver includes a push-clamp rod 251 and a clamping block 253. The proximal end of the coupling block 452 is connected to the distal end of the second coupling member, and the distal end of the coupling block 452 is connected to the push-clamp rod 251. Multiple side cavities 252 are evenly spaced along the shaft of the push-clamp rod 251, with each corresponding clamping block 253 mounted therein. It is understood that these side cavities 252 may also be arranged at unequal intervals. Each clamping block 253 is pivotally mounted within a corresponding side cavity 252 of the push-clamp rod 251 via an elastic member 254 (e.g., a spring). Specifically, the proximal ends of the clamping blocks 253 are mounted within pin holes 404 on the upper and lower walls of the side cavities 252 via a rotating shaft 255. The elastic member 254 is disposed within the side cavities 252, with its proximal end connected to the proximal end of the side cavities 252 and its distal end connected to the proximal end of the clamping block 253. In the initial state, the distal end of the clamping block 253 is tilted downwardly away from the rod 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 cartridge 220. As the clamping rod 251 retreats, the clamping block 253 is subjected to the upward force of the clip and rotates upward around the rotation axis 255 toward the rod of the clamping rod 251. Therefore, when the clamping rod 251 retreats, the clamping block 253 does not interfere with the clip. When the clamping rod 251 completes its retreat, each clamping block 253 moves to abut against the tail end 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 forward. As the clamping block 253 advances, it pushes the remaining clips in the cartridge 220 forward one station, preparing for the next clip delivery.

[0120] 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.

[0121] 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. 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 clip at the farthest end of the clip cartridge 220 into the jaw assembly. To make the overall structure of the transmission mechanism more compact, fully utilize space, and reduce the overall size of the clip applier forceps, 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 clamp feed drive tube 402 on a plane perpendicular to the longitudinal direction lies within the projection of the jaw drive tube 432 on this plane. The clamp feed drive mechanism is capable of longitudinal movement within the jaw drive mechanism. The projection of the jaw drive tube 432 on a plane perpendicular to the longitudinal direction lies within the projection of the drive element (i.e., the switching mechanism) on this plane. The projection of the proximal clamp push drive element on this plane lies within the projection of the clamp feed drive tube 402 on this plane. The clamp push drive mechanism is capable of longitudinal movement within the clamp feed drive mechanism. The distal clamp push drive element and the clamp feed assembly are located on either side of the clamp cartridge 220. Furthermore, the proximal clamp feed drive element, the proximal clamp push drive element, and the jaw drive tube 432 are coaxial. Specifically, the clip delivery drive tube 402 is located within the jaw drive tube 432, the proximal end of the clip push drive member is located within the clip delivery drive tube 402 and is capable of moving within the clip delivery drive tube 402. More specifically, the proximal end of the adapter block 452 is located within the clip delivery drive tube 402, and the clip push rod 251 and the clip delivery assembly are located on both sides of the cartridge 220. The structure and position of the cartridge 220 are described above and will not be repeated here.

[0122] From the above description, it can be seen that the clamp includes a knob 310, and a pin 316 is provided in 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 drive member of the jaw drive mechanism, the proximal drive member of the clamp feeding drive mechanism, the base 240, and the clamp box 220 and is installed at another position on the side wall of the knob 310 that is symmetrical to the first position; the proximal drive member of the jaw drive mechanism is provided with a second waist-shaped hole 404448, the proximal drive member of the clamp feeding drive mechanism is provided with a first waist-shaped hole 420 404, 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 place on the side wall of the knob 310, and the other end passes through the first waist-shaped 420 hole 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 installed at another place on the side wall of the knob 310 that is symmetrical to the first place, 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.

[0123] The following is a detailed description of the working process of the clip applier to achieve clip delivery, jaw assembly closing, and clip pushing:

[0124] 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 drive member gradually approach the proximal end of the jaw driving tube 432; when the actuator 330 moves to the intermediate position, the moving part of the drive member runs to the second guide surface 496 in the shell 321, the card block 482 disengages from the card slot of the clamp feeding drive tube 402, the drive 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 fed into the jaw assembly (the clamp feeding action is completed), and the distal end surface 508 of the drive member abuts against the proximal end surface 502 of the jaw driving mechanism. After the driver is separated from the clamp feed drive mechanism, the stop end 354 of the clamp feed stop mechanism can abut against the clamp feed drive tube 402 to prevent the clamp in the jaw assembly from retreating due to the retreat of the clamp feed drive mechanism. Continuing to press the actuator 330, the actuator 330 moves from the intermediate position toward the closed position, and the clamp feed stop mechanism gradually disengages from the clamp feed drive tube 402. Under the action of the actuator 330, the driver pushes the jaw drive mechanism forward while continuing to drive the coupling mechanism to retreat the clamp push drive mechanism. As the clamp push drive mechanism retreats, its third reset member continues to accumulate energy, and the jaw drive tube 432 drives the sleeve 210 forward to close the jaw assembly. When the actuator 330 is pressed to the closed position, the jaw drive mechanism completes its forward travel (the jaw closing action is completed), the third reset member stops accumulating energy, and the clamp feed stop mechanism completely disengages from the clamp feed drive tube 402. The clamp feed drive tube 402 is then 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 clamp push drive mechanism advances under the action of the third reset member to move the remaining clamps in the clamp box 220 forward one station (the clamp push action is completed).

[0125] The above-mentioned matching mechanism is described in detail below.

[0126] The coupling mechanism includes a first coupling part, an intermediate part and a second coupling part, and 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 feeding drive mechanism and the jaw driving mechanism, which are used to complete the clamp feeding 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 feeding 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 feeding and clamp pushing actions. The clamp pushing action is asynchronous with the clamp feeding action and the clamping action through the coupling mechanism, effectively avoiding the interference problem of the clamp feeding action and the clamp pushing action, thereby effectively improving the safety and reliability of the clamping forceps.

[0127] 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, while driving 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; when the actuator 330 is released, the continuous firing drive mechanism advances under the action of the third reset member to perform the clamping action. The structure, positional relationship, connection relationship, etc. of the switching mechanism, clamp feeding drive mechanism, jaw driving mechanism and clamping pushing drive mechanism are the same as those described above and will not be repeated here.

[0128] The first connecting member includes an upper rack 462, the second connecting member includes a lower rack 468, and the intermediate member includes a first gear 464 and a second gear 466. The upper rack 462 meshes with the first gear 464, and 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 larger than the diameter of the second gear 466. In other words, the firing drive mechanism is connected to the upper rack 462 through a switching mechanism, and the continuous firing drive mechanism is connected to the lower rack 468. The upper rack 462 and the lower rack 468 move in opposite directions. When the upper rack 462 moves a first distance in a first direction, the lower rack 468 moves a second distance in a direction opposite to the first direction. In other words, when the firing drive mechanism moves a first distance in the first direction, the continuous firing drive mechanism moves a second distance in a second direction opposite to the first direction, and the first distance is greater than the second distance. 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 clamps 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 continuous clamping applications is increased to meet the doctor's surgical needs.

[0129] 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 along a direction perpendicular to the longitudinal direction.

[0130] To achieve a more compact overall structure, the rapid-fire drive mechanism and the second connector move longitudinally within the clamp-feed drive mechanism. The axis of the first connector is perpendicular to the axis of the intermediate member and parallel to the axis of the second connector. The axis of the second connector is coaxial with the axis of the proximal drive member (connecting block 452) of the rapid-fire drive mechanism and the axis of the proximal drive member (clip-feed drive tube 402 and jaw drive tube 432) of the firing drive mechanism. To ensure smooth and stable movement of the first and second connectors, a first guide slot 472 and a second guide slot 474 are provided within the housing 321. The first connector moves within the first guide slot 472, and the second connector moves within the second guide slot 474.

[0131] As can be seen from the foregoing, the burst drive mechanism includes a push-and-clamp drive member and a third reset member. The push-and-clamp drive member is connected to the distal end of the second connecting member. The push-and-clamp drive member is longitudinally spaced apart with multiple side cavities 252, each of which houses a corresponding push-and-clamp block 253. The push-and-clamp drive member, under the action of the third reset member, moves, causing the push-and-clamp block 253 to move, thus performing the push-and-clamp action. This third reset member stores energy when the burst drive mechanism retreats. To achieve a more compact overall structure and maximize space utilization, the third reset member of the burst drive mechanism is located within the second guide slot 474, with one end connected to the proximal end of the second connecting member and the other end connected to the housing 321 located proximal to the second guide slot 474.

[0132] In order to prevent the second connecting member connected to the continuous driving mechanism from rotating when the knob 310 rotates, the distal end of the second connecting member has a accommodating space. In order to facilitate installation, the accommodating space has an opening, and the proximal end of the push-and-clamp driving member is accommodated in the accommodating space through the opening and can rotate in the accommodating space; the proximal end of the push-and-clamp driving member has a stop portion 506, which abuts against the limiting surface 470 in the accommodating space to axially fix the continuous driving mechanism and the distal end of the second connecting member.

[0133] The following is a detailed description of the working process of the transmission mechanism of the clamp applicator to perform the clamp feeding action, clamping action, and clamp pushing action in combination with the matching mechanism:

[0134] 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 is disengaged from the card 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). After the switching mechanism is separated from the clamp driving mechanism, the stopper end 354 of the clamp feeding stopper mechanism can abut against the clamp feeding drive tube 402 to prevent the clamp in the jaw assembly from retreating due to the retreat of the clamp feeding drive mechanism. The actuator 330 is continuously pressed, causing the actuator 330 to move from the intermediate position toward the closed position, and the clamp feeding stopper mechanism gradually disengages from the clamp feeding drive tube 402. Under the action of the actuator 330, the switching mechanism continues to push the jaw driving mechanism and the first connecting member forward. Simultaneously, the first connecting member continues to drive the second connecting member backward through the intermediate member. Since the second connecting member is connected to the clamp pushing drive mechanism, the clamp pushing drive mechanism continues to retreat. As the clamp pushing drive mechanism retreats, its third reset member 456 continues to accumulate energy, and the jaw driving tube 432 drives the sleeve 210 forward to close the jaw assembly (clamping action is completed). The third reset member 456 completes its energy accumulation, and the clamp feeding stopper mechanism completely disengages from the clamp feeding drive tube 402. The clamp feeding drive tube 402 is reset under the action of the first reset member 418. The actuating member 330 is released, and the jaw drive mechanism is reset under the action of the second reset member 446. The clamp push drive mechanism advances under the action of its third reset member 456 to move the remaining clamps in the clamp box 220 forward one station (the clamp push action is completed).

[0135] In this embodiment, the clip feeding drive mechanism is used to drive the clip at the farthest end of the clip cartridge 220 forward into the jaw assembly, and the clip pushing drive mechanism is used to drive the remaining clips in the clip cartridge 220 forward one station. The clip feeding drive mechanism includes a proximal clip feeding drive member and a distal clip feeding drive member connected to the proximal clip feeding drive member, and the clip pushing drive mechanism includes a proximal clip pushing drive member and a distal clip pushing drive member connected to the proximal clip pushing drive member. The motion trajectory of the proximal clip feeding drive member is parallel to the motion trajectory of the proximal clip pushing drive member, and the motion trajectory of the distal clip feeding drive member intersects with the motion trajectory of the distal clip pushing drive member. Using different drive mechanisms to respectively perform the clip feeding action and the clip pushing action increases design space and enables more reliable and stable execution of the clip feeding action and the clip pushing action. Furthermore, the clip feeding action is executed earlier than the clip pushing action, and the two actions are asynchronous and do not interfere with each other, thereby effectively improving the safety and reliability of the clip applier.

[0136] It should be noted that, in this implementation,

[0137] A motion trajectory is the path formed by the motion of each point on a component. When the motion trajectories of component A and component B are both straight lines, if at least one line in component A's trajectory is collinear with at least one line in component B's trajectory, the trajectories of component A and component B are said to be "coaxial." If all lines in component A's trajectory are parallel to all lines in component B's trajectory, the trajectories of component A and component B are said to be "parallel." A component's motion trajectory refers to the trajectory formed within a single execution cycle.

[0138] In this embodiment, the proximal clamp-pushing driver is movably positioned within the proximal clamp-feeding driver, and the distal clamp-feeding driver and the distal clamp-pushing driver are positioned on opposite sides of the clip cartridge 220. Specifically, the distal clamp-pushing driver is positioned on the side of the clip cartridge 220 that accommodates the clips (the inner side of the clip cartridge 220), while the distal clamp-feeding driver is positioned on the side of the clip cartridge 220 that does not accommodate the clips (the outer side of the clip cartridge 220). As can be seen from the foregoing, the proximal clamp-feeding driver advances in the longitudinal direction and drives the distal clamp-feeding driver to move from the outer side of the clip cartridge 220 to the plane where the clips are located, where the driver abuts against the clip at the farthest end of the clip cartridge 220, thereby pushing the clip forward to the jaw assembly. When the clip-feeding driver mechanism retracts, the proximal clamp-feeding driver drives the distal clamp-feeding driver to return along the original path to its initial position. The proximal-end driving member for pushing the clamp retreats in the longitudinal direction and drives the distal-end driving member for pushing the clamp backward. When the distal-end driving member for pushing the clamp retreats, its distal end moves from a position abutting against the corresponding clamp on the inner side of the clamp box 220 toward the rear of the clamp adjacent to its proximal end, away from the bottom wall 221 of the clamp box 220. When the proximal-end driving member for pushing the clamp advances in the longitudinal direction, it drives the distal-end driving member for pushing the clamp forward to push the remaining clamps in the clamp box 220 forward one station. Therefore, during the movement of the transmission mechanism, the motion trajectory of the distal-end driving member for feeding the clamp intersects with the motion trajectory of the distal-end driving member for pushing the clamp. The intersection of the motion trajectories of the components includes the intersection of the motion trajectories of the components themselves and the intersection of the extension lines of the motion trajectories of the components. The motion trajectory of the proximal-end driving member for feeding the clamp is parallel to the motion trajectory of the proximal-end driving member for pushing the clamp.

[0139] In this embodiment, the proximal-end driving member for feeding the clamp is sleeved on the proximal-end driving member for pushing the clamp, so that the structure of the transmission mechanism is more compact and space is fully utilized. The feeding driving mechanism and the pushing driving mechanism can move within the jaw driving mechanism. The jaw driving mechanism moves forward or backward in the longitudinal direction, and its motion trajectory is parallel to the motion trajectory of the proximal-end driving member for feeding the clamp or the motion trajectory of the proximal-end driving member for pushing the clamp, and intersects with the motion trajectory of the distal-end driving member for feeding the clamp or the motion trajectory of the distal-end driving member for pushing the clamp. The jaw driving mechanism includes a jaw driving tube 432 and a sleeve 210 connected thereto. The jaw driving tube 432 drives the sleeve 210 to move so that the jaw assembly is closed. The motion trajectory of the jaw driving tube 432 and the motion trajectory of the sleeve 210 together constitute the motion trajectory of the jaw driving mechanism. Such a design makes the layout of the transmission mechanism reasonable and the structure compact.

[0140] The proximal-end driving member for clip delivery includes a clip delivery drive 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 into the jaw assembly; the proximal-end driving member for clip pushing includes a coupling block 452, and the distal-end driving member for clip pushing includes a clip pushing block 253, which is used to drive the remaining clips in the clip box 220 to move forward one station; the motion trajectory of the clip delivery drive tube 402 is parallel to the motion trajectory of the coupling block 452 and the motion trajectory of the jaw drive mechanism, and the motion trajectory of the clip delivery block 231 intersects with the motion trajectory of the clip pushing block 253 and the motion trajectory of the jaw drive mechanism. In order to make the overall structure more compact, the coupling block 452 is partially located in the clip delivery drive tube 402 and can move in the longitudinal direction within the clip delivery drive tube 402. The proximal end of the clip delivery drive tube 402 is located in the jaw drive tube 432 and can move in the longitudinal direction within the jaw drive tube 432.

[0141] The clamp feed block 231 is connected to the clamp feed drive tube 402 via the clamp feed rod 233. The clamp feed drive mechanism also includes a base 240 fixed to the housing 321, and the base 240 is slidably connected to the clamp feed rod 233. The distal end of the base 240 is provided with a guide ramp 498243 for guiding the clamp feed block 231 out of the base 240 to drive the clamp at the farthest end of the clamp box 220. The movement trajectory of the clamp feed 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 via the clamp push rod 251. Multiple 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. This design makes the overall layout of the machine reasonable and fully utilizes space.

[0142] The following details the motion trajectory of the clamping block 231 and the motion trajectory of the clamping block 253. Figure 23A and Figure 23B, is a schematic diagram of the movement process and movement trajectory of the clamp feeding block 231 when the clamp feeding drive mechanism moves forward; As can be seen from the above, the clamp feeding block 231 moves on the first plane where the base 240 is located to the guide slope 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 follows Figure 23A As shown, we can derive the motion trajectory diagram of any point on it as follows Figure 23B As shown. Figure 24A and Figure 24B The figure shows the motion process and trajectory of the clamping block 253 when the clamping drive mechanism retreats. As can be seen from the above, the clamping block 253 retreats with the clamping drive mechanism. When it retreats to the clamp adjacent to its proximal end, the distal end of the clamping block 253 is forced upward by the clamp to flip upward around the rotation axis 255. When the distal end of the clamping block 253 continues to retreat and reaches the rear of the clamp adjacent to its proximal end, the distal end of the clamping block 253 flips downward to its original position under the action of the spring. The motion process is shown in FIG. Figure 24A As shown, the motion trajectory of the clamping block 253 can be obtained. Taking the distal end point E of the clamping block 253 as an example, the motion trajectory diagram formed is shown as follows: Figure 24B It should be noted that this is only a schematic indication, and the motion trajectory may be adjusted according to the actual specific design, such as the curvature of the curve. It can be seen that during the movement of the transmission mechanism, the motion trajectory of the clamping block 231 intersects with the motion trajectory of the clamping push block 253.

[0143] The transmission mechanism also includes a switching mechanism and a matching mechanism. The switching mechanism is used to selectively drive the clip feeding drive mechanism or the jaw drive mechanism. The matching mechanism is connected to the switching mechanism at one point and to the clamp pushing drive mechanism at another point, with a distance between the one point and the other point. Under the action of the actuator 330, the switching mechanism sequentially drives the clip feeding drive mechanism and the jaw drive mechanism to move in a first direction, while simultaneously driving the matching mechanism to drive the clamp pushing drive mechanism to move in a second direction to store energy, wherein the first direction is opposite to the second direction. The clamp pushing drive mechanism includes a third reset member 456 for storing this energy. When the actuator 330 is released, the clamp pushing drive mechanism advances under the action of the third reset member 456 to move the remaining clips in the clip cartridge 220 forward one station. The motion trajectory of the switching mechanism is coaxial with the motion trajectory of the jaw drive mechanism, making full use of space and a more compact structure. The coupling mechanism includes a first coupling member and a second coupling member driven by the first coupling member. The first coupling member is connected to the switching mechanism, and the second coupling member is connected to the push-and-clamp drive mechanism. The motion trajectory of the first coupling member is parallel to that of the jaw drive mechanism, and the motion trajectory of the second coupling member is parallel to that of the jaw drive mechanism. This makes the overall transmission mechanism more compact and fully utilizes space.

[0144] In this embodiment, Figures 25 to 33D As shown, the clip applier also has a structural design that allows the wrench to be locked in a special position, the specific details of which are as follows.

[0145] In this embodiment, the wrench is movably connected to the shell 321 of the main body 320, and the wrench can move to three special positions: at the initial moment, the user does not operate the wrench, and the position of the wrench is the open position; when the user operates the wrench and the clamp feeding is completed, the position of the wrench is the middle position; when the user operates the wrench and the clamp application is completed, the position of the wrench is the closed position, 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. 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's first forward motion is defined as the wrench's movement from the open position to the intermediate position; the wrench's second forward motion is defined as the wrench's movement from the intermediate position to the closed position; the wrench's second reset motion is defined as the wrench's movement from the closed position to the intermediate position; and the wrench's first reset motion is defined as the wrench's movement from the intermediate position to the open position. The user operates the wrench to perform forward motion, and in response to the user's operation, the wrench moves from the open position to the intermediate position and then to the closed position.

[0146] According to the above, at least part of the clamp feeding drive mechanism and at least part of the jaw driving mechanism are housed in the housing 321, such as the clamp feeding proximal drive member and the jaw proximal drive member mentioned above. The clamp feeding drive mechanism and the jaw driving mechanism are connected to the wrench and driven by the wrench to move forward. The clamp feeding drive mechanism drives the clamp 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 in the middle position, the clamp is in the ready position, that is, the first section of the forward movement of the wrench drives the clamp feeding action and realizes the clamp feeding into place. The ready position is a position where the first clamp is stably clamped by the jaw assembly and can be effectively compressed to a closed state. If the clamp slides in the jaw assembly so that it is not in the ready position, insufficient support for the clamp will be caused during the clamping process, causing the clamp to automatically pop out or twist, resulting in poor compression effect. The jaw drive mechanism drives the jaw drive mechanism to move forward in response to the movement of the wrench from the 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 movement of the wrench drives the closing action and realizes the jaw closing to the bottom and clamping in place. Clamping in place means that the clamp in the jaw assembly is compressed to a closed state.

[0147] The clip applier of this embodiment is capable of applying multiple clips continuously. To achieve this, the wrench must be reset to the open position to prepare for the next application. Resetting the wrench is cumbersome and results in a poor user experience if the user still has to perform this operation. In this embodiment, the clip applier also includes a wrench reset mechanism connected to the wrench. When the user stops operating the wrench, the wrench reset mechanism drives the wrench to reset in the opposite direction of its forward motion. The wrench reset mechanism includes an elastic element. During forward motion of the wrench, the elastic element is compressed and deformed, storing energy. When the wrench is not in operation, the elastic element returns to its original shape due to the accumulated energy, providing a reset force that causes the wrench to reset. 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, through the aforementioned coupling structure, drives the input member backward, thereby causing the input member's drive surface 504 to push the wrench to reset. In another embodiment, the wrench reset mechanism includes, in addition to the third reset member 456, a second reset member 446 of the jaw drive mechanism. During the movement of the wrench from the closed position to the intermediate position, in addition to the third reset member 456 providing a reset force to the handle, the second reset member 446 also provides a reset force to the handle. Specifically, during the movement of the wrench from the closed position to the intermediate position, the jaw drive tube 432 and the input member always remain in contact. During the reset movement of the second reset member 446 itself, the jaw drive tube 432 is driven to retreat, and the jaw drive tube 432 pushes the input member to retreat, so that the driving surface 504 of the input member pushes the wrench to perform a reset movement until the jaw drive tube 432 returns to the initial position and disengages from the input member. From this moment on, the third reset mechanism will provide the reset force to the wrench alone.

[0148] The doctor operates the wrench in forward motion to sequentially deliver and apply the clip. If there is no clear pause or boundary between the delivery and application of the clip, the doctor will experience poor user experience. The clip applier forceps of this embodiment also include a wrench locking mechanism. The wrench locking mechanism includes a guide member 351 and a guide channel 340 disposed on the wrench and moving with the wrench. The guide channel 340 includes a starting point a, a locking point b, and an end point. At least a portion of the guide member 351 is accommodated in the guide channel 340, and the guide member 351 moves relative to the guide channel 340. In response to the wrench moving from the open position to the intermediate position, the guide member 351 moves relative to the guide channel 340 from the starting point a to the locking point b. In response to the wrench moving from the intermediate position to the closed position, the guide member 351 moves relative to the locking point b to the end point. During the user's forward motion of the wrench, if the wrench is in the intermediate position when not being operated, the guide member 351 prevents the wrench from returning to its original position at the locking point b. The user operates the wrench to move the wrench, driving the guide channel 340 to move, thereby causing the guide channel 340 to move relative to the guide member 351, also referred to as the guide member 351 moving relative to the guide channel 340 or the guide member 351 moving relative to the guide channel 340. The guide channel 340 is a closed channel provided on the wrench, and the guide member 351 cannot escape from the guide channel 340, and thus cannot escape from the wrench. Thus, the locking point b of the wrench locking mechanism can provide a pause point for the clamping and clamping actions. The doctor can observe at this pause point whether the position of the jaw assembly is suitable for the tissue to be clamped, and can adjust the position of the jaw assembly if necessary, thereby improving the user experience; the locking point b is provided by the wrench's own structure, and the structure is simple; the guide channel 340 on the wrench is a closed channel, the moving channel of the guide member 351 is stable, and the locking effect of the wrench is stable.

[0149] Furthermore, in guide channel 340, guide member 351 prevents the wrench from resetting only when it is at locking point b. That is, guide channel 340 provides only one locking point b, which prevents the wrench from resetting. During forward movement, if the wrench is in any position other than the open or intermediate position when operation stops, the wrench reset mechanism will actuate the wrench to reset. This ensures that during operation, the wrench is locked only in the intermediate position to indicate the completion of clamp delivery, without being disturbed by other positions, thus improving the user experience.

[0150] Furthermore, before reaching the closed position, the wrench 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. In response to the wrench's reset to the intermediate position, the guide member 351 moves to the locking point b. At the locking point b, the guide member 351 prevents the wrench from further reset. This further utilizes the single locking point provided by the guide channel 340 to prevent the wrench from resetting. If the wrench is stopped during the clip application process, the wrench will stop at the intermediate position where clip delivery is complete, rather than directly resetting to the open position. This prevents the user from operating the wrench beyond the intermediate position and being unable to verify the completion of clip delivery. This provides the user with the opportunity to observe the surgical progress and adjust the clamping position of the jaw assembly before clip delivery is complete, thereby improving the user experience.

[0151] Furthermore, when the wrench reset mechanism drives the wrench to reset to the intermediate position, it also simultaneously drives the jaw drive mechanism backward, thereby causing the jaw assembly to open. Whether before or after the wrench reaches the closed position, if the second reset movement occurs, the jaw drive mechanism will be driven backward and the jaw assembly will open. In particular, if the clip applier has begun clamping but has not completed it, the wrench has not reached the closed position, the jaw assembly has not fully closed, and the clamp has not been compressed to the closed state, releasing the wrench at this time can abandon the clamping process, return the jaw assembly to the fully open state, and restore the clamp to the open state. Subsequent adjustment of the jaw assembly's position on the tissue will not damage the tissue, making this design safer and more user-friendly.

[0152] 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 within 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 movement channel for the guide member 351, which has strong movement stability, and thus 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 Figure 25 As shown, the closed groove is a closed groove that passes through 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 pass through the wrench main body 331320, and only a closed channel for the guide member 351 to move therein is required.

[0153] In this embodiment, Figure 25As shown, the wrench includes a wrench body 331320, a user-operated pressing portion 332 disposed at one end of the wrench body 331320, and a pushing portion 333 disposed at the other end of the trigger body 320. The pushing portion 333 abuts against and pushes the clamp feed 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. A 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 located in the middle of the wrench, further improving the stability of the movement of the guide member 351. No additional structure is required to provide the guide channel 340, resulting in a compact structure of the wrench locking mechanism.

[0154] In this embodiment, Figure 26 As shown, the guide channel 340 includes a main channel 341 and only one slave channel 343 extending from the opening portion 342 of the main channel 341, the opening portion 342 is located between the two ends of the main channel 341, and the two ends of the main channel 341 are respectively provided with a starting point a and an end point, and the end of the slave channel 343 away from the opening portion 342 is provided with a locking point b; 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 this structure, guide channel 340 provides only a locking point to prevent the wrench from resetting. If the wrench is released during the first forward movement before reaching the wrench's intermediate position, the wrench will reset to the open position and stop. If the wrench is released after leaving the intermediate position and continuing forward movement before reaching the closed position, the wrench will reset to the intermediate position and be locked in this position by the locking point b of the wrench locking mechanism, preventing further reset movement. Thus, from the moment the clip delivery action is completed to the moment the clip application action is completed, the user will clearly feel the wrench pause at the intermediate position when the wrench is released. This pause is unique and undisturbed, notifying the user that clip delivery has been completed but clip application has not yet been completed. The user can also adjust the position of the clip applier, providing a good user experience.

[0155] Slave channel 343 includes a blocking wall 344. When the wrench is not being operated and guide member 351 is at locking point b, guide member 351 abuts against blocking wall 344 in the direction of the wrench's return movement, thereby preventing the wrench from returning at locking point b. In other words, blocking wall 344 prevents guide member 351 at locking point b from moving toward starting point a. The simple channel wall design of slave channel 343 achieves locking at locking point b without requiring additional locking components, resulting in a simple and compact structure.

[0156] Main channel 341 includes a first wall extending from starting point a to a connection with blocking wall 344, with the first wall and blocking wall 344 forming a right or acute angle. This simple angled design of the guide channel ensures that blocking wall 344 effectively prevents guide member 351 from disengaging from locking point b in slave channel 343. Furthermore, when guide member 351 passes through the right or acute angle point during forward movement from main channel 341 into slave channel 343, it makes a clattering sound, clearly alerting the user that the wrench has reached the intermediate position and that the clamp is now in place.

[0157] Slave channel 343 also includes a guide wall 345 connected to blocking wall 344. Guide wall 345 guides bidirectional movement of guide member 351 between locking point b and the end point. The simple channel wall structure of slave channel 343 enables bidirectional movement between locking point b and the end point. The wrench will not be locked in either direction, allowing the user to smoothly operate it to the closed position or return it to the intermediate position without the need for additional guiding elements, resulting in a simple and compact structure.

[0158] 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. This 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 either direction.

[0159] Specifically, such as Figure 25As shown, the main channel 341 is a circular arc channel with the pivot end 334 of the wrench as its center, and the slave channel 343 extends from the opening 342 of the main channel 341 in a direction away from the pivot end 334, that is, the distance between the 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 circular 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 continuously increases and is always greater than X. In particular, the distance Y0 is the maximum when the guide member 351 is located at the locking point b. As can be seen from the above, when the wrench is moved and the guide member 351 moves only within the main channel 341, the guide member 351 does not actually move relative to the housing 321. In the present application, the guide channel 340 is not limited to the above-described shape. In other embodiments, for example, the main channel 341 is an arcuate channel with different distances from the pivot end 334 at both ends of the arcuate channel, but the aforementioned X of the arcuate channel is still less than Y, and the aforementioned wrench locking function is still achieved. Any guide channel 340 structure that can ensure that the locking point b is achieved by cooperating with the slave channel 343 and is locked is within the scope of protection of the present application.

[0160] 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 the force-bearing end 353, and the other end abuts 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 circular 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.

[0161] Specifically, such as Figure 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 the 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. 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 Figure 27 The horizontally connected lever shown can also be an angled lever. The above is a specific embodiment of the guide pivot member 350 - a lever. The structure of the guide pivot member 350 is not limited thereto. For example, in other embodiments, a first rotating arm 526 extends from the pivot end 352 of the guide pivot member 350, and the guide member 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 achieve the wrench locking elastic element 355 applying a force to the guide member 351 through the guide pivot member 350 to separate from the main channel 341 and enter the slave channel 343, all of which are within the scope of protection of the present invention.

[0162] In the above method, 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 housing 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. The bending of the guide member 351 provides a "force to separate from the main channel 341 and enter the slave channel 343", but such a rigid "V"-shaped rod is prone to wear and breakage. In another embodiment, the wrench locking elastic element 355 is formed of an elastic material that can undergo large deformation. The wrench locking elastic element 355 is, for example, a "V"-shaped metal spring 522 or a spring, one end of which is fixedly connected to the housing 321 and the other end is provided with the guide member 351. Due to the large elasticity of the locking elastic element, the stability of the guide member 351 connected thereto in the movement within the channel is poor, and the function of locking the wrench in the middle position cannot be well achieved. In summary, 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 adopted in this embodiment has the following benefits in addition to the above-mentioned benefits: it is not easy to cause the problem of component damage or breakage, ensures the stability of the movement of the guide member 351, and further ensures the stability of the wrench locking mechanism. Preferably, in this embodiment, the wrench locking elastic element 355 is a spring.

[0163] 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 feeding drive mechanism; before the wrench moves from the middle position to the closed position, the stop end 354 remains in contact with the clamp feeding drive mechanism to prevent the clamp feeding drive mechanism from retreating.

[0164] Specifically, such as Figure 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 the stop end 354 , so that the guide member 351 , the stop end 354 and the force-bearing end 353 all move around the pivot end 352 . At the initial moment, when the clamping forceps are not in use, the wrench is in the open position, the guide pivot 350 is located below the clamp feeding drive mechanism, and the backstop 354 has no contact with the clamp feeding drive mechanism; when the wrench moves forward and the guide 351 moves toward the opening 342 in the main channel 341, the clamp feeding drive mechanism moves forward, and the backstop 354 still has no contact with the clamp feeding drive mechanism; when the guide 351 enters the slave channel 343 and moves toward the locking point b, the distance between the backstop 354 and the end of the clamp feeding drive mechanism gradually decreases until it abuts against the end, preventing it from retreating; when the guide 351 exits the slave channel 343 along the guide wall 345 and returns to the main channel 341, the jaw drive mechanism is clamping, and the backstop 354 always maintains abutment with the end of the clamp feeding drive mechanism to prevent it from retreating, thereby ensuring that the clamp located in the jaw assembly will never retreat during the clamping process, thereby ensuring the stability of the clamping. Specifically, as Figures 25-26 As shown, the slave channel 343 extends from the opening 342 of the main channel 341 toward the direction away from the pivot end 334 of the wrench, and the distances from the starting point a and the end point to the pivot end 334 of the wrench are both smaller than the distance from the locking point b to the pivot end 334 of the wrench.

[0165] like Figure 26 As shown, the guide member 351 has a first motion path when the wrench moves forward and a second motion path when the wrench returns to the closed position. The first motion path includes the main channel 341 and the slave channel 343, and the second path includes the main channel 341 and does not include the slave channel 343. The above motion path is the path of relative movement of the guide member 351. The motion path is the path formed by the channel reached during the movement. When the wrench reaches the closed position, the user releases the wrench, and the wrench returns to the open position under the action of the wrench reset mechanism. During this period, no stopping is required. The second motion path shields the slave channel 343, preventing the guide member 351 from entering the slave channel 343 and being locked by the locking point b during the reset movement. That is, the wrench locking mechanism, which plays an important role in the forward movement, is prevented from playing a reverse role in the reset movement, thereby achieving a one-step reset of the wrench.

[0166] Further, if Figure 29-33DAs shown, to achieve the aforementioned shielding of the slave channel 343, the clip applier further includes a path switching member 360 for switching between a first motion path and a second motion path. The path switching member 360 is located within the housing 321 and has two states. When the path switching member 360 is in the first state, the path switching member 360 clears 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 column extending radially and passing through the guide channel 340. The guide member 351 includes a first part and a second part connected to each other. 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, it can prevent the guide member 351 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, it prevents the first part of the guide member 351 from entering the slave channel 343, that is, it can also prevent the guide member 351 from entering the slave channel 343.

[0167] 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 area between the starting point 342a and the ending point b is 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 always 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.

[0168] In this embodiment, Figures 31A-31D As shown, the path switching member 360 has the following state logic that is relatively easy to implement: during the period when the wrench is moving forward and moves from the open position to the closed position, the path switching member 360 is in the first state, so that the guide member 351 can smoothly enter and exit the slave channel 343 during the forward movement; when the wrench is moving forward and reaches the closed position, the path switching member 360 switches from the first state to the second state. After the wrench reaches the closed position, it makes a reset movement and moves from the closed position to the intermediate position. During the reset movement from the closed position, the path switching member 360 is in the second state, so that the guide member 351 cannot enter the slave channel 343 at all times. The state control logic of the path switching member 360 of this embodiment controls the state of the path switching member 360 based on the position of the wrench, achieving the same function with greater stability and a simpler design.

[0169] Furthermore, when the wrench reaches the closed position and begins to reset, the path switching member 360 is in the first state when it is in the open position. 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. Thus, at the end of a cycle of continuous application of the clip applier, the path switching member 360 returns to its initial state, allowing it to function normally in the next cycle.

[0170] 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.

[0171] Furthermore, to achieve state switching of the path switching member 360, the clamp applier also includes a path driving member 370 located within the housing 321. The path switching member 360 is disposed in one of the wrench and the main body 320, while the path driving member 370 is disposed in the other of the wrench and the main body 320. Specifically, the path switching member 360 is disposed in one of the main housing 321 of the wrench and the main body 320, while the path driving member 370 is disposed in the other of the main housing 321 of the wrench and the main body 320. During forward or return motion of the wrench, when the path driving member 370 abuts against the path switching member 360, it drives the path switching member 360 to move, thereby switching the path switching member 360 between the first and second states. The movement of the wrench drives the path driving member 370, which in turn drives the path switching member 360 to change its state, ultimately returning to switching the motion path of the wrench's guide channel 340. The movement of the wrench is the power source for switching the wrench's motion path, creating an internal loop that is simple and reliable, without requiring an additional power source to change the motion path.

[0172] 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 it moves to a certain position, switching between the first state and the second state occurs.

[0173] Specifically, in this embodiment, Figure 29 As shown, the path switching member 360 includes a pivot portion 361, a trigger portion and an execution portion 363. The path switching member 360 rotates around the pivot portion 361. The trigger portion includes a first trigger portion 362a and a second trigger portion 362b respectively arranged on both sides of the pivot 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 in front of the first trigger portion 362a, and the second guide rib 372 is located behind the second trigger portion 362b. 2a abuts against the first guide rib 371 and moves along the first guide inclined surface 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 inclined surface 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.

[0174] During the forward movement of the wrench, the path switching member 360 and the path driving member 370 move relative to each other. 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 path switching member 360 in the relative movement direction 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 path switching member 360 in the relative movement direction relative to the path driving member 370.

[0175] like Figure XAs shown, in this embodiment, the pivot portion 361 is a rotating shaft 255, fixed in a horizontal pin hole 404 of the wrench main component. The first trigger portion 362a and the second trigger portion 362b are two plates extending from the rotating shaft 255, namely a first plate 362a' and a second plate 362b', which form an obtuse angle. The actuator 363 is a rib connected to the first plate 362a'. The pivot portion 361 of the path switching member 360 is connected to the wrench, specifically at a position on the wrench body 331320 near the slave channel 343. The obtuse angle of the first plate 362a' and the second plate 362b' faces the inside of the main housing 321. The guide rib is provided on the inside of the main housing 321, and the inclined surfaces 498 of the first guide bevel 498372 and the second guide bevel 498374 face the wrench body 331320. In other embodiments, the first plate 362a' and the second plate 362a' may form an acute angle or a right angle.

[0176] 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 positions of the wrench also include a first adjacent position located between the intermediate position and the closed position and close to the closed position, and a second adjacent position located between the open position and the intermediate position and 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 pivot 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 trigger 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 pivot 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 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 pivot portion 361 relative to itself is in the second position, and the path switching member 360 switches 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 trigger 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 pivot 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 toward 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 A angle 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.

[0177] In other embodiments, unlike this embodiment, the position of the wrench further includes a third proximal position and a fourth proximal position located between the open position and the intermediate position, with the fourth proximal position being closer to the open position. Prior to the wrench's reset movement reaching the third proximal position, the second trigger portion 362b is disengaged from the second guide rib 372. The specific position, movement, and state of the path switching member 360 are the same as described above and are not further described. During the movement of the wrench from the third proximal position to the fourth proximal position, the second trigger portion 362b abuts the second guide rib 372 and rotates in the second direction along the second guide slope 498-374. When the wrench is in the fourth proximal position, the path switching member 360 returns to the first position and the first state, as described above. During subsequent movement of the wrench from the fourth proximal 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. This method also allows the path switching member 360 to return to its initial state, allowing it to function normally during the next cycle of continuous application of the clip applier.

[0178] In this embodiment, the clip applier further includes a positioning mechanism, such as Figure 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, which are arranged on the wrench. 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. In 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 in other positions. Therefore, the path switching member 360 is positioned relative to its own pivot portion 361 and can only be located in two fixed positions, such as the first position and the second position mentioned above, and when in the first position, the path switching member 360 is in the first state, and when in the second position, the path switching member 360 is in the second state.

[0179] The first positioning member 381 is located in the first recess 383. When the user operates the wrench to rotate the path switching member 360 in the first direction, the first positioning member 381 also rotates in the first direction, abutting against the protrusion 440 portion 385. Since one of the first positioning member 381 is an elastic element that can be compressed, the first positioning member 381 can smoothly pass over the protrusion 440 portion 385 and enter the second recess 384. If the user stops operating the wrench while passing over the protrusion 440 portion 385, the first positioning member 381 can return to the first recess 383 due to the reaction force of the elastic element. Similarly, the first positioning member 381 can smoothly pass over the protrusion 440 portion 385 from the second recess 384 and enter the first recess 383. This will not be repeated here.

[0180] According to the above, the path switching member 360 and the path driving member 370 can be in a disengaged state. Without the aforementioned positioning mechanism, the path switching member 360 can freely move relative to its own pivot portion 361. When the clip applier is vibrated or shaken, the path driving member 370 will freely rotate in the first direction or the second direction, thereby accidentally entering the second state when the clip applier is required to be in the first state. If the path switching member 360 accidentally enters the first state when the clip applier is required to be in the second state, the first motion path for the forward motion and the second motion path for the return motion of the clip applier will be disrupted, and the clip applier cannot be used normally. Therefore, the aforementioned positioning mechanism prevents the path switching member 360 from accidentally moving, ensuring the normal motion path of the clip applier.

[0181] The first positioning member 381 may be a first rib 436, facing away from the obtuse angle and protruding from the pivot 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.

[0182] 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.

[0183] 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 the structure of the first jaw arm. Figure 34As shown, the first pliers arm comprises a base, a first side portion, and a second side portion. The base, first side portion, and second side portion give the first pliers arm a roughly U-shaped cross-section. The first side portion comprises a first guide portion and a first accommodating portion, both located on the inner wall of the first side portion. The second side portion comprises a second guide portion and a second accommodating portion, both located on the inner wall of the second side portion. The base is located between the first and second guide portions, with a gap formed between the first and second accommodating portions. The first and second guide portions have identical structures, and the first and second accommodating portions have identical structures. This disclosure focuses on the structures of the first and second guide portions. The first guide portion comprises a guide surface, at least the second portion of which is roughly arc-shaped. The guide surface comprises a first portion flush with the upper surface of the base portion and a second portion higher than the upper surface of the base portion. The second portion is formed by extending the first portion along a roughly arc-shaped direction, creating a smooth transition between the first and second portions. The first accommodating portion is located distal to the first guide portion and is recessed. The first receiving 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, which is the distal end of the second portion.

[0184] The jaw assembly also includes a stopper. There are four stoppers in total, which are provided on the first and second jaw arms and respectively cooperate with the first and second guide portions 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 will be described using 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. The first stopper comprises a base and a movable portion. The movable portion comprises an end portion and a middle portion, with the middle portion located between the end portion and the base. The base portion is larger than the middle portion and the end portion and engages with a groove provided in the first side portion, thereby securing the base to the first side portion. Both the middle portion and the end portion are located on the inner side of the inner wall of the first side portion. The movable portion is movable in both the upward and downward directions. Thus, the first guide portion and the first stopper together form a guide space for the clamp. Similar in structure, the first and second clamp arms also have three guide spaces. These four guide spaces correspond to the four protrusions of the clamp. In the initial state, the first stopper does not engage with the protrusions of the clamp, and the distance between the second portion of the guide surface and the first stopper decreases toward the distal end of the guide surface. This distance is minimized at the intersection with the first stopper. The above distance may be determined, for example, by using the minimum distance between a certain point along the second portion and the lower surface of the first stopper, where the minimum distance decreases toward the distal end of the guide surface.

[0185] The stopper is elastic, including the following two methods. In one method shown in this embodiment, the stopper is made of an elastic material, including but not limited to metal, so that the stopper tends to maintain its original position. In another method shown in other embodiments, at least a portion 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 tends to approach the guide surface. The stopper is elastic, so that the protrusion of the clip is constrained by the stopper in the guide space, thereby ensuring that the clip remains in the guide space during its distal movement, thereby causing the clip to gradually open. Based on the elasticity of the stopper, the stopper includes a base and a movable portion. The movable portion can move up and down in two ways: in one way shown in this embodiment, the base is connected to the clamp arm, and the movable portion can move up and down due to the elasticity of the material of the stopper; in another way shown in other embodiments, the base is pivotally connected to the clamp arm, and the movable portion 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 portion, so that the movable portion has a tendency to move toward the guide surface. The movable portion can move up and down, making room for the protrusion to smoothly leave the guide space and enter the accommodating portion.

[0186] The maximum dimension of the first protrusion 36 is substantially the same as the maximum dimension of the second protrusion 37. The shape of the first protrusion 36 and the shape of the second protrusion 37 can be the same or different. Thus, the first protrusion 36 and the second protrusion 37 can fit into substantially the same guide space. It should be noted that the dimensions of the first protrusion 36 and the second protrusion 37 can also be set to be different, or even the dimensions of the two first protrusions 36 and the two second protrusions 37 can be set to be different. In this case, the guide space in which the protrusions cooperate can be appropriately modified, that is, the relative position, shape, and / or size of the guide portion and the stopper can be appropriately modified.

[0187] When the jaw assembly is fully opened, the clip is propelled distally from the cartridge 220 into the jaw assembly by the clip delivery drive mechanism. The first and second protrusions of the clip each enter the corresponding guide spaces and move distally within the corresponding guide spaces until the clip is positioned at the distal end of the jaw assembly. At least a portion of the first and second protrusions each enter and are contained within the receptacle. The first and second protrusions are guided by the guides, thereby moving along the guide surfaces under the restraint of the stopper, allowing the clip to move in the desired direction. Prior to entry into the jaw assembly, the clip is partially compressed and stored within the cartridge 220 due to the size and internal space of the cartridge 220. This partially compressed state requires external force to return the clip to its original, open shape after it is released from the sleeve 210. Compressed refers to the clip's two arms approaching each other but not engaging. Because the clip remains in a compressed state for a period of time between assembly and use, the compression during this period causes the clip to tend to maintain its compressed shape. The first and second protrusions are also constrained by a stopper, which prevents them from maintaining their compressed shape during distal movement within the guide space. This allows the first and second arms of the clip to gradually open during distal movement until they return to their original shapes or align with the angle of the jaw assembly's opening. This return to its original shape or alignment with the angle of the jaw assembly's opening maximizes the clamping space between the two arms of the clip, facilitating the accommodating of tissue to be clamped. In the initial state, the protrusions of the clip have not entered the guide space and are therefore not constrained by the stopper. At this point, the distance between the second portion of the guide surface and the corresponding stopper decreases toward the distal end of the guide surface until the distance between the distal end of the second portion (i.e., the distal end of the guide surface) and the stopper reaches a minimum. Because the aforementioned distance decreases in the direction toward the distal end of the guide surface, the first and second protrusions of the clip gradually approach the exit (i.e., the intersection) of the guide space and the entrance of the accommodating portion as they move toward the distal end of the guide surface, thereby enabling the first and second protrusions to smoothly enter the accommodating portion. The aforementioned distance decreases in the direction toward the distal end of the guide surface, for example, by having at least the second portion of the guide surface be substantially arc-shaped. As the first and second protrusions move distally within the guide space, the restraining force they are subjected to increases, causing the protrusions of the clip to be guided by the second portion of the guide surface while being further restrained by the stopper, thereby suppressing the movement speed of the protrusions of the clip and preventing the protrusions from passing over the entrance of the accommodating portion due to excessive speed after leaving the guide space and thus failing to enter the accommodating portion.Furthermore, 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 portion of the guide surface), they will not continue to move in the original direction under the restraining action of the stopper and will not enter the receiving portion. After the first protrusion and the second protrusion cross the intersection and enter the receiving portion, the clamp is moved into position and is in the above-mentioned preparation position, completing the clamp feeding. Since the movable portion of the stopper can move up and down, when the distance between the second portion of the guide surface and the corresponding stopper decreases in the direction toward the distal end of the guide surface, while the stopper restrains the protrusion of the clamp, the movable portion of the stopper can make room for the protrusion of the clamp through movement, 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 clamp 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 fall out. Furthermore, the first protrusion and the second protrusion accommodated in the accommodating portion are both subjected to the force exerted 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 generally downward and upward force, or a generally distal force, 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 clip maintains a stable position during the closing process of the jaws, thereby ensuring the clamping effect. It should be noted that the present invention also includes a clamp feeding and retreating mechanism for preventing the clamp feeding drive mechanism from retreating, and thereby preventing the clip from retreating. The function of the accommodating portion and the stopper is to keep the position of the clip at the distal end of the jaw assembly stable so as to facilitate smooth clamping.

[0188] Subsequently, the jaw assembly enters a closing process, with the first and second arms approaching each other until they reach the end of their travel, at which point the jaw assembly completes closing. During the closing process of the jaw assembly, if the first protrusion and / or the second protrusion is not accommodated in the accommodating portion, the jaw arm will be unable to apply force to at least one of the protrusions through the accommodating portion, causing the clamp to twist or move out of the correct position, resulting in the two clamp arms being unable to engage, thereby causing clamping failure. At least a portion of the first protrusion and at least a portion of the second protrusion are both accommodated in the accommodating portion. Thus, during the closing process of the jaw assembly, the first arm drives the first clamp arm, and the second arm drives the second clamp arm to rotate about the connecting portion, thereby bringing the first and second clamp arms closer to each other. Ultimately, the first engaging portion of the first clamp arm engages the second engaging portion of the second clamp arm, securing the first and second clamp arms to each other. During the closing process of the jaw assembly, the clamps maintain a stable position, preventing undesirable movement or twisting of the clamps, which could result in engagement failure and clamping failure. After the protrusion is accommodated in the accommodating portion, further, the two first protrusions are both abutted by the stopper, and the two second protrusions are also both abutted by the stopper, further ensuring that the protrusion is accommodated in the accommodating portion and will not fall off from the accommodating portion.

[0189] In another embodiment, the structure of the first clamp arm is different from the structure of the second clamp arm. The structure of the first clamp arm is the same as that of the previous embodiment. The difference in structure between the second clamp arm and the first clamp arm is that the first part of the guide surface of the first guide portion of the second clamp arm includes a stroke extension structure, and the first part of the guide surface of the second guide portion of the second clamp arm also includes a stroke extension structure. Preferably, the stroke extension structure is a pit. The stroke extension structure lengthens the stroke of the first clamp arm of the clamp, and in the same time, the distance the second clamp arm moves toward the distance is greater than the distance the first clamp arm moves toward the distance, thereby allowing the clamp to move along the distance during the movement. Figure X The counterclockwise rotation in X causes the first and second protrusions of the clamp to be located on the same vertical line, thus changing the state in which the first and second protrusions are not on the same vertical line when compressed. This prevents the clamp from moving smoothly due to uneven force during movement and avoids the impact caused by the first protrusion of the first clamp arm entering the accommodating portion first. It should be noted that when the asymmetric clamp is compressed in the clamp box 220, due to the different curvatures of the two clamp arms, the first protrusion of the first clamp arm is located farther than the second protrusion of the second clamp arm. In this embodiment, the first portion of the guide surface of the first guide portion and the second guide portion of the second clamp arm, excluding the stroke extension structure, can be flush with the upper surface of the bottom.

[0190] The clip applier further comprises 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 for accommodating 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, 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 in the fully opened state). 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 Figure X As shown in FIG. 1 , the distal end of sleeve 210 engages with the lower surface of the first arm and the upper surface of the second arm. Sleeve 210 is driven by the jaw drive mechanism to move, and the distal end of sleeve 210 also moves accordingly. As the distal end of sleeve 210 moves distally, it engages with the lower surface of the first arm and the upper surface of the second arm, driving the first and second arms to pivot toward each other, thereby closing the jaw assembly. After the jaw assembly is closed, the first elastic element is compressed, storing energy. As sleeve 210 moves proximally, the distal end of sleeve 210 moves proximally, releasing the energy accumulated in the compressed first elastic element. The elastic force of the first elastic element forces the proximal ends of the first and second arms away from each other, thereby opening the first and second arms. Using the first elastic element to open the jaw assembly avoids the need for 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 move closer to each other to store energy. 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.

[0191] 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.

[0192] Combine Figures 43 to 45 , which is the second embodiment of the present invention, is the same as the first embodiment, and this embodiment relates to a clip applier.

[0193] Compared with the first embodiment, this embodiment differs 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 pushing drive mechanism and combined with the clamp feeding 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 this 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 in the initial position without any movement; this effectively ensures that the clamp feeding action and the clamp pushing action are asynchronous and do not interfere with each other. Compared with the first embodiment, while effectively ensuring the safety and reliability of the clamp applier, the overall structure of the clamp applier is simpler.

[0194] The jaw drive mechanism is sleeved within the clamp feed drive mechanism and the clamp push drive mechanism and is used to drive the jaw assembly to close. In the third state, the drive member engages with both the jaw drive mechanism and the clamp push drive mechanism simultaneously to drive the jaw drive mechanism and the clamp push drive mechanism to move synchronously. In this embodiment, since the jaw drive mechanism and the clamp push drive mechanism move synchronously, the transmission mechanism does not have a second state, as compared to the first embodiment. The clamp feeding drive mechanism includes a clamp feeding drive tube 402 and a clamp feeding assembly connected to the clamp feeding drive tube 402. The clamp feeding drive tube 402 drives the clamp feeding assembly to move, thereby driving the clamp into the jaw assembly. The specific structure is the same as described above. The jaw driving mechanism includes a jaw driving tube 432 and a sleeve 210 connected to the jaw driving tube 432. The specific structure is the same as described above. The clamp pushing drive mechanism includes a clamp pushing drive tube 459 and a clamp pushing drive member connected to the clamp pushing drive tube 459. The clamp pushing drive member is provided with a plurality of side cavities 252 spaced apart in the longitudinal direction. Each side cavity 252 is correspondingly provided with a clamp pushing block 253. The clamp pushing drive member drives the clamp pushing block 253 to move. In this embodiment, the clamp pushing drive member is a clamp pushing rod 251. The specific structure of the clamp pushing rod 251 is the same as described above. The structure of the driving member is the same as that of the switching mechanism described above or below, and will not be described in detail here. In order to make the overall structure more compact, the clamp push drive tube 459 is sleeved on the clamp delivery drive tube 402, and the clamp push drive tube 459 is coaxial with the clamp delivery drive tube 402. The clamp delivery assembly and the clamp push 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 clamp push 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 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 the jaw driving tube 432 to the jaw driving tube 432.

[0195] Of course, in another embodiment, in the third state, the driving member first drives the clamp pushing drive mechanism to move until it is coupled with the jaw driving mechanism, and then drives the jaw driving mechanism and the clamp pushing drive mechanism to move synchronously. The jaw driving mechanism is sleeved on the clamp feeding drive mechanism and the clamp pushing drive mechanism. In the initial state, the distance from the proximal end of the clamp pushing drive tube 459 to the distal end of the driving member is smaller than the distance from the proximal end of the jaw driving tube 432 to the distal end of the driving member. In this way, during the movement of the driving member, it first engages with the clamp pushing drive tube 459, pushes the clamp pushing drive tube 459 to move until it is coupled with the jaw driving tube, and then pushes the jaw driving tube 432 and the clamp pushing drive tube 459 to move together. Similarly, in order to make the overall structure more compact, the clamp pushing drive tube 459 is sleeved on the clamp feeding drive tube 402.

[0196] The jaw drive mechanism also includes a second reset member 446, such as an elastic element. This elastic element is sleeved over the jaw drive tube 432. One end of the elastic element abuts the baffle 434 on the outer surface of the jaw drive tube 432, and the other end extends forward to abut the inner wall of the clip applier housing 321. The elastic element is used to store energy when the jaw drive mechanism advances, and then release this energy by restoring its shape, thereby providing power for resetting 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 the inner wall of the clip applier housing 321, and the other end extends rearward to abut 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 then release this energy by restoring its shape, thereby providing power for resetting 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 rib 436 on the inner wall of the clamp pushing drive tube 459, and the other end extends backward and abuts against the distal end surface 508 of the clamp feeding drive tube 402. The elastic element is used to store energy when the clamp feeding drive mechanism moves forward. The elastic element restores its deformation and releases the energy, thereby providing power for the reset of the clamp feeding drive mechanism.

[0197] The following describes in detail the working process of the clamp applier to deliver the clip, close the jaw assembly, and push the clip, taking the third state as an example, in which the driving member is simultaneously engaged with the jaw driving mechanism and the clamp pushing mechanism to drive the jaw driving mechanism and the clamp pushing mechanism to move synchronously.

[0198] 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 driving member drives the clamp feeding drive mechanism forward, and 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 and the clamp pushing drive tube 459; when the actuator 330 moves to the middle position, the guide 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 tube 432 and the proximal end surface 502 of the clamp pushing drive tube 459. After the switching mechanism is separated from the clamp feeding drive mechanism, the stopper end 354 of the clamp feeding stopper mechanism can abut against the clamp feeding drive tube 402 to prevent the clamps in the jaw assembly from retreating due to the retreat of the clamp feeding drive mechanism. Continuing to press the actuator 330, the actuator 330 moves from the intermediate position toward the closed position, and the clamp feeding stopper mechanism gradually disengages from the clamp feeding drive tube 402. Under the action of the actuator 330, the driver pushes the jaw driving mechanism and the clamp pushing drive mechanism forward. The jaw driving tube 432 drives the sleeve 210 forward to close the jaw assembly. The clamp pushing drive mechanism advances to move the remaining clamps in the clamp cartridge 220 forward one position. When the actuator 330 moves to the closed position, the jaw assembly closes (the jaw closing action is completed) and the remaining clamps in the clamp cartridge 220 are all moved forward one position (the clamp pushing action is completed). The clamp feeding stopper mechanism completely disengages from the clamp feeding drive tube 402, and the clamp feeding drive tube 402 is reset under the action of the first reset member 418. When the actuating member 330 is released, the jaw drive mechanism is reset under the action of the second reset member 446, and the push-clamp drive mechanism is reset under the action of the third reset member 456. In other words, during this operation, the switching mechanism is first separated from the jaw drive mechanism and the push-clamp drive mechanism, and then combined with the clamp feed drive mechanism to drive the clamp feed drive mechanism to move. Then, the switching mechanism is separated from the clamp feed drive mechanism, and then combined with the jaw drive mechanism and the push-clamp drive mechanism to drive the jaw drive mechanism and the push-clamp drive mechanism to move synchronously.

[0199] The following is a detailed description of the working process of the clip applier of the present invention in which one actuator 330 drives three drive mechanisms.

[0200] The switching mechanism is respectively connected to the clamp feeding drive mechanism, the jaw drive 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 drive 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.

[0201] The advantage of this design is that the surgeon operates a single actuator 330, which in turn acts on the switching mechanism, which in turn acts on three different drive mechanisms—the clip delivery drive mechanism, the jaw drive mechanism, and the clamp push drive mechanism—allowing the three different drive mechanisms to perform their corresponding actions in a pre-set sequence. In other words, the surgeon can operate a single actuator 330 to perform the clip delivery, jaw closing, and clamp push actions, all in a pre-set sequence without interfering with each other. This ensures the safety and smoothness of the surgeon's surgical operation, and the operation is simple and user-friendly.

[0202] Due to the working mode of the clip applier, the jaw closing action, the clamp delivery action, and the clamp pushing action cannot be performed simultaneously. In this embodiment, the three actions are arranged in a predetermined order such that the clamp delivery action is performed before the jaw closing action and the clamp pushing action. In other words, the clamp delivery action is performed first, followed by the jaw closing action and the clamp pushing action. The order of the three actions can be: the clamp delivery action is performed first, the jaw closing action is performed second, and the clamp pushing action is performed last, as in the first embodiment; or the clamp delivery action is performed first, followed by the jaw closing action and the clamp pushing action, as in the second embodiment. The jaw closing action and the clamp pushing action can be performed simultaneously, or the clamp pushing action can be performed first and then the jaw closing action and the clamp pushing action are performed simultaneously. Specifically, as described in the first embodiment, the push-clip drive mechanism is connected to the switching mechanism via a matching mechanism, and the push-clip drive mechanism and the switching mechanism move in opposite directions. When the actuator 330 is pressed, the switching mechanism, under the action of the actuator 330, first separates from the jaw drive mechanism and combines with the clamp feed drive mechanism to drive the clamp feed drive mechanism forward to perform the clamp feed action. Thereafter, the switching mechanism separates from the clamp feed drive mechanism and combines with the jaw drive mechanism to drive the jaw drive mechanism forward to perform the jaw closing action. When the switching mechanism drives the clamp feed drive mechanism and the jaw drive mechanism forward, it simultaneously drives the matching mechanism to move to drive the push-clip drive mechanism backward and store energy. The push-clip drive mechanism includes a third reset member 456 for storing this energy. When the actuator 330 is released, the push-clip drive mechanism advances 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, clamp feed drive mechanism, jaw drive mechanism, and push-clip drive mechanism are the same as those of the first embodiment and will not be described in detail here.

[0203] As can be seen from the description of the second embodiment above, 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 simultaneously combined with the jaw drive mechanism and the push-clip drive mechanism 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, thereby driving the jaw drive mechanism and the push-clip drive mechanism to move synchronously. The structure, positional relationship, connection relationship, and movement relationship 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.

[0204] In addition, the structure of the actuating member 330 is the same as described above and will not be described again here.

[0205] Combine Figures 46 to 50 , which is the third embodiment of the present invention, is the same as the above embodiment, and this embodiment relates to a clip applier.

[0206] This embodiment differs from the previous embodiment in the structure of the first clutch mechanism of the switching mechanism. In this embodiment, the height difference between different portions of the guide rail is utilized to force the first clutch member to flip and engage different drive mechanisms, thereby achieving switching between different clamp feeding and jaw closing actions. The first clutch member includes a pivot block 514, and the clutch switching mechanism is the same as described above. The proximal end of the clamp feeding drive mechanism is provided with a first groove 314524, and the pivot block 514 cooperates with this first groove 314524 to couple the first clutch member with the clamp feeding drive mechanism. The second clutch member is the distal end surface 508 of the switching mechanism body. The pivot block 514 is pivotally mounted on the switching mechanism body. The pivot block 514 includes a block-shaped 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. A hole 404 for mounting the guide post 490 is located at the upper end of the pivot block 514. The pivot block 514 slidably engages with the guide rail within the housing 321 via the guide post 490. The first clutch member also includes a spring 522 disposed above the first guide surface 494. The spring 522 applies a downward force to the guide post 490, enabling the first clutch member to better engage with the clamp feed 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 feeding drive mechanism, and the actuator 330 drives the switching mechanism forward, and the pivot block 514 moves forward accordingly and drives the clamp feeding drive mechanism to move toward the distal end to perform the clamp feeding 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 feeding 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 driving mechanism, thereby driving the jaw driving 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.

[0207] Combine Figures 51 to 54 , which is the fourth embodiment of the present invention, is the same as the above-mentioned embodiment and relates to a clip applier.

[0208] This embodiment differs from the previous embodiment in the structure of the switching mechanism. In this embodiment, the switching mechanism does not include a moving part or a motion guide. Instead, the switching mechanism comprises a rotating arm 526 pivotally mounted on a switching mechanism body 500. The rotating arm 526 comprises 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. The rotating arm 526 is pivotally connected to the switching mechanism body 500 via the second rotating shaft. The switching mechanism body 500 is sleeved onto the clamp feed drive mechanism. In the initial state, the second engaging recess 530 of the rotating arm 526 engages 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 distally 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. The inclined surface 498 of the rotating arm 526 is guided by the proximal guide surface of the jaw driving mechanism to flip upward, thereby disengaging the second engaging recess 530 of the rotating arm 526 from the second groove 534. At this time, the distal end surface 508 of the switching mechanism moves to engage with the jaw driving mechanism, thereby driving the jaw driving mechanism forward. The advantage of this design is that it simplifies the structure of the switching mechanism and makes the overall structure more compact.

[0209] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0210] 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 comprising a housing, a transmission mechanism, an actuator, a jaw assembly, and a clip housed in a clip cartridge, wherein at least a portion of the transmission mechanism is housed in the housing; the actuator is configured to provide power to the transmission mechanism; and wherein: The transmission mechanism includes a clamp feeding drive mechanism and a clamp pushing drive mechanism; the clamp feeding drive mechanism is used to drive the clamp at the farthest end of the clamp box to move forward into the jaw assembly, and the clamp pushing drive mechanism is used to drive the remaining clamps in the clamp box to move forward one work station; the clamp feeding drive mechanism includes a clamp feeding proximal end drive member and a clamp feeding distal end drive member connected to the clamp feeding proximal end drive member, and the clamp pushing drive mechanism includes a clamp pushing proximal end drive member and a clamp pushing distal end drive member connected to the clamp pushing proximal end drive member; the motion trajectory of the clamp feeding proximal end drive member is parallel to the motion trajectory of the clamp pushing proximal end drive member, and the motion trajectory of the clamp feeding distal end drive member first intersects with and then becomes parallel to the motion trajectory of the clamp pushing distal end drive member.

2. The clip applier according to claim 1, wherein: The transmission mechanism also includes a jaw driving mechanism, and the clamp feeding driving mechanism and the clamp pushing driving mechanism both move within the jaw driving mechanism; the motion trajectory of the jaw driving mechanism is parallel to the motion trajectory of the clamp feeding proximal driving member or the motion trajectory of the clamp pushing proximal driving member, and intersects with the motion trajectory of the clamp feeding distal driving member or the motion trajectory of the clamp pushing distal driving member.

3. The clip applier according to claim 2, wherein: The jaw drive mechanism includes a jaw drive tube and a sleeve connected to the jaw drive tube. The jaw drive tube drives the sleeve to move, thereby driving the jaw assembly to close. The motion trajectory of the jaw drive tube and the motion trajectory of the sleeve together constitute the motion trajectory of the jaw drive mechanism.

4. The clip applier according to claim 2, wherein: The proximal end driving member for delivering the clip includes a clip delivering driving tube, and the distal end driving member for delivering the clip includes a clip delivering block; the clip delivering driving tube drives the clip delivering block to move, thereby driving the clip to be delivered into the jaw assembly; The proximal push-clamp drive member includes a matching block, and the distal push-clamp drive member includes multiple push-clamp blocks. The matching block drives the multiple push-clamp blocks to move, thereby driving the remaining clamps in the clamp box to move forward one workstation; the movement trajectory of the clamp feeding drive tube is parallel to the movement trajectory of the matching block and the movement trajectory of the jaw driving mechanism, and the movement trajectory of the clamp feeding block intersects with the movement trajectory of the push-clamp block and the movement trajectory of the jaw driving mechanism.

5. The clip applier according to claim 4, wherein: The clamp delivery drive mechanism also includes a clamp delivery rod, and the clamp delivery block is connected to the clamp delivery drive tube via the clamp delivery rod; the clamp delivery drive mechanism also includes a base fixedly connected to the shell, and the base is slidably matched with the clamp delivery rod; a guide slope is provided at the far end of the base for guiding the clamp delivery block to be pushed out from the base to drive the clamp at the farthest end of the clamp box; the movement trajectory of the clamp delivery rod is parallel to the movement trajectory of the jaw drive mechanism.

6. The clip applier according to claim 4, wherein: The push-clamp driving mechanism also includes a push-clamp rod, and the push-clamp block is connected to the matching block through the push-clamp rod. A plurality of side cavities are arranged along the rod body of the push-clamp rod, and each side cavity is correspondingly installed with a push-clamp block; the movement trajectory of the push-clamp rod is parallel to the movement trajectory of the jaw driving mechanism.

7. The clip applier according to claim 2, wherein: The transmission mechanism further includes a switching mechanism and a matching mechanism, wherein the switching mechanism is used to selectively drive the clamp feeding drive mechanism or the jaw driving mechanism; one portion of the matching mechanism is connected to the switching mechanism, and another portion is connected to the clamp pushing drive mechanism, with a distance between the one portion and the other portion; under the action of the actuating member, the switching mechanism sequentially drives the clamp feeding drive mechanism and the jaw driving mechanism to move in a first direction, and simultaneously drives the matching mechanism to move, thereby driving the clamp pushing drive mechanism to move in a second direction to store energy, the first direction being opposite to the second direction; The push-clamp drive mechanism includes a third reset member, which is used to store the energy; when the actuator is released, the push-clamp drive mechanism advances under the action of the third reset member to move the remaining clips in the clip box forward one station; the motion trajectory of the switching mechanism is coaxial with the motion trajectory of the jaw drive mechanism.

8. The clip applier according to claim 7, wherein: 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 push-clamp drive mechanism; the movement trajectory of the first matching part is parallel to the movement trajectory of the jaw drive mechanism, and the movement trajectory of the second matching part is parallel to the movement trajectory of the jaw drive mechanism.

9. The clip applier according to claim 1, wherein: The clamp pushing proximal end driving member is movably located in the clamp delivering proximal end driving member, and the clamp delivering distal end driving member and the clamp pushing distal end driving member are located on both sides of the clamp box.

10. The clip applier according to claim 3, wherein: The jaw drive tube is sleeved on the clamp delivery proximal end drive component, and the clamp delivery proximal end drive component is sleeved on the clamp push proximal end drive component.

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