Clip applier mechanism and clip applier device

Abstract

To provide, in the field of medical devices, particularly a clip applier mechanism and a clip applier apparatus thereof.SOLUTION: The clip applier mechanism includes a tube body, a main shaft, a clip-cartridge assembly, and a clip-pushing assembly. The clip applier mechanism further includes: a main-shaft connector fitted on the main shaft, connected with the main shaft, and configured to move in the same direction as the main shaft in an axial direction of the tube body; a housing configured to accommodate the main shaft and the main-shaft connector; and a locking mechanism arranged between the main-shaft connector and the housing. In response to the clip conveyed into the end effector, the main-shaft connector and the housing are locked with each other through the locking mechanism. Thereby, when the clip applier mechanism is secondarily used, a next clip can be prevented from being conveyed into the end effector to avoid damage to the end effector.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to the medical device field, and more particularly to a clip applier mechanism and a clip applier device thereof. [Background technology]

[0002] In a surgical procedure, blood vessels need to be closed using surgical instruments to prevent blood loss from an incision at a surgical site. Generally, a clip applier device includes an elongated clip applier mechanism and a handle assembly. The clip applier mechanism can be inserted deep into the human body through an auxiliary tool such as a trocar. By manipulating the handle assembly, the clip applier mechanism is controlled to deliver a ligation clip (abbreviated as "clip") to an end effector located at the tip of the clip applier mechanism, and the end effector is closed so that the clip clamps the blood vessel. Summary of the Invention [Means for solving the problem]

[0003] SUMMARY OF THE DISCLOSURE Embodiments of the present invention provide a clip applier mechanism and a clip applier device thereof.

[0004] According to a first aspect of the present invention, a clip applicator includes a tube having opposing head and distal ends, a spindle disposed adjacent the distal ends and at least a portion of which is disposed within the tube, a clip bin assembly extending through the tube and including a clip bin disposed within the tube and configured to receive a clip, and an end effector protruding from the head end, and a clip pusher assembly disposed at least a portion of the tube and configured to be pushed by the spindle toward the head end to transport a clip in the clip bin into the end effector. A clip applier mechanism for a pliers device is provided, the clip applier mechanism further comprising: a spindle connector adapted to be fitted onto and connected to the spindle and adapted to move in the same axial direction as the spindle in the axial direction of the tube; a housing adapted to accommodate the spindle and the spindle connector; and a locking mechanism provided between the spindle connector and the housing, the locking mechanism, the spindle connector, and the housing adapted such that when the clip is transported into the end effector, the spindle connector and the housing are locked to each other by the locking mechanism.

[0005] In at least some embodiments, the locking mechanism includes a first locking member on the spindle connector and a second locking member on the housing, the first locking member and the second locking member configured to lock together when the spindle and the spindle connector move toward the head end to press against the clip pushing assembly and deliver the clip into the end effector.

[0006] In at least some embodiments, the main shaft includes opposing first and second ends, the first end being proximate the head end and the second end being distal to the head end in an axial direction of the tube, the main shaft connector is a tubular member at least a portion of which is fitted onto the second end of the main shaft, the tubular member includes a tube wall including first and second end faces opposed in an extension direction of the tubular member, the first end face being proximate the head end and the second end face being distal to the head end, and the first locking member includes a protrusion extending from the first end face of the tube wall in a direction toward the head end.

[0007] In at least some embodiments, the tubular member further includes a through groove formed in the tube wall, the extension direction of the through groove being parallel to the axial direction of the tubular member, and the through groove including a slot opened in the first end face, the slot being adjacent to the protrusion.

[0008] In at least some embodiments, the tubular member includes at least two of the through grooves, and at least two slots of the at least two of the through grooves are provided on opposite sides of the projection along a circumference of the tubular member.

[0009] In at least some embodiments, the overall length of the tubular member in its extending direction is 4 to 12 times the distance in the axial direction of the tubular member between the distal end of the protrusion and the first end face.

[0010] In at least some embodiments, the first locking member further includes a first hook provided on the protrusion, the housing includes an inner wall facing the spindle connector, and the second locking member includes a second hook provided on the inner wall, the first hook and the second hook configured to engage with each other.

[0011] In at least some embodiments, the spindle connector is located between the spindle and the housing in the radial direction of the spindle, and when the locking mechanism locks the spindle connector and the housing together, the spindle and the spindle connector cannot move in the axial direction of the tube, but are capable of relative movement between them in the circumferential direction of the spindle.

[0012] In at least some embodiments, the clip applier mechanism further includes an axial engagement mechanism between the main shaft and the main shaft connector, the main shaft and the main shaft connector being connected to each other in the axial direction of the main shaft by the axial engagement mechanism but allowing relative movement between the main shaft and the main shaft connector in the circumferential direction of the main shaft.

[0013] In at least some embodiments, the axial engagement mechanism includes an engagement groove provided on the spindle and an engagement pin provided on the spindle connector and configured to move within the engagement groove circumferentially around the spindle.

[0014] In at least some embodiments, the engagement groove is an annular recessed groove extending circumferentially around the main shaft.

[0015] In at least some embodiments, the locking mechanism includes a first locking member disposed on the spindle connector and a second locking member disposed on the housing, the clip applier mechanism having an initial state and a clip feed complete state, in which in the initial state no external force is applied to either the spindle or the spindle connector, and in the clip feed complete state the clip has already been delivered into the end effector, the locking mechanism being configured to change from the initial position to a locked position when the clip applier mechanism is switched from the initial state to the clip feed complete state, in which in the initial position the first locking member and the second locking member are spaced apart axially from one another in the tubular body, the first locking member being farther from the head end than the second locking member, and in the locked position the first locking member and the second locking member are locked to one another.

[0016] In at least some embodiments, the clip applier mechanism further includes a firing assembly located at least partially within the tube and configured to be pushed by the shaft toward the head end to close the end effector and fire the clip in the end effector, the clip applier mechanism further having a fired state, a retracted state, and a rotated back state, wherein in the fired state, the clip in the end effector is fired, in the retracted state, the firing assembly moves away from the head end, and in the rotated back state, the firing assembly is returned, and wherein the locking mechanism is in three different unlocked positions when the clip applier mechanism is in the fired state, the retracted state, or the rotated back state, respectively, such that the first locking member and the second locking member are unlocked from one another.

[0017] In at least some embodiments, the clip applier mechanism further has an adjustment state, in which the clip is already delivered into the end effector and an opening and closing angle of the end effector can be adjusted, and the locking mechanism is configured to be in four different unlocked positions and the first locking member and the second locking member are unlocked from each other when the clip applier mechanism is in the adjustment state, the fired state, the retracted state and the rotated back state, respectively.

[0018] In at least some embodiments, the locking mechanism is configured to change from the locked position to a first unlocked position when the clip applier mechanism is switched from the complete clip feed state to the adjustment state, and in the first unlocked position, the first locking member and the second locking member are spaced apart a first distance axially of the tube.

[0019] In at least some embodiments, the locking mechanism is configured to transition from the first unlocked position to a second unlocked position when the clip applier mechanism is switched from the adjusted state to the fired state, wherein in the second unlocked position, the first locking member and the second locking member are spaced apart a second distance axially of the tube and a first circumferential distance circumferentially of the tube, the second distance being greater than the first distance, and the first circumferential distance being greater than zero.

[0020] In at least some embodiments, the locking mechanism is configured to transition from the second unlocked position to a third unlocked position when the clip applier mechanism is transitioned from the fired state to the retracted state, wherein in the third unlocked position, the first locking member and the second locking member are separated axially of the tube by a third distance and remain separated circumferentially of the tube by a first circumferential distance, the third distance being less than the second distance and greater than zero.

[0021] In at least some embodiments, the clip applier mechanism further includes a rotated back state in which the firing assembly is reset and the locking mechanism is configured to change from the third unlocked position to a fourth unlocked position when the clip applier mechanism is switched from the retracted state to the rotated back state, wherein in the fourth unlocked position, the first locking member and the second locking member are spaced apart about the circumference of the tube by a second circumferential distance, the second circumferential distance being less than the first circumferential distance and greater than zero.

[0022] In at least some embodiments, the locking mechanism is configured to change from the fourth unlocked position to the initial position when the clip applier mechanism is returned from the rotated back state to the initial state, and in the fourth unlocked position, the first locking member and the second locking member are separated by a fourth distance axially of the tubular body and a second circumferential distance circumferentially of the tubular body, the fourth distance being less than the third distance, and the second circumferential distance being less than the first circumferential distance and greater than zero.

[0023] In at least some embodiments, the spindle connector has an initial state and a clip feed complete state, and when the spindle connector is switched from the initial state to the clip feed complete state, the spindle connector is configured to move toward the head end, carrying the first locking member with it, to cause the locking mechanism to reach the locked position.

[0024] In at least some embodiments, the spindle connector further has a fired state, a retracted state, and a rotated back state, and the spindle connector is configured to move with the first locking member when switched between the fired state, the retracted state, and the rotated back state to cause the locking mechanism to be in three different unlocked positions, respectively.

[0025] In at least some embodiments, the spindle connector further has an adjustment state, and the spindle connector is configured to move with the first locking member when switched between the adjustment state, the fired state, the retracted state, and the rolled back state to cause the locking mechanism to be in four different unlocked positions, respectively.

[0026] In at least some embodiments, when the spindle connector is switched from the clip feed complete state to the adjustment state, it is configured to continue to move toward the head end, carrying the first locking member with it, so as to increase an axial spacing of the tubular body between the first locking member and the second locking member to a first distance.

[0027] In at least some embodiments, when the shaft connector is switched from the adjustment state to the fired state, the shaft connector is configured to continue to move toward the head end, carrying the first locking member with it, to increase the first distance to a second distance, and at the same time, to further rotate, carrying the first locking member with it, along a first rotational direction to increase a circumferential spacing between the first locking member and the second locking member around the tube to a first circumferential distance, the circumferential direction of the tube including the first rotational direction and a second rotational direction opposite to the first rotational direction.

[0028] In at least some embodiments, the spindle connector is configured to move away from the head end, carrying the first locking member with it, when switched from the fired state to the retracted state, to reduce the second distance to a third distance.

[0029] In at least some embodiments, when the main shaft connector is switched from the retracted state to the rotation return state, the main shaft connector is configured to continue to move away from the head end, taking the first locking member with it, so as to reduce the axial distance of the tube between the first locking member and the second locking member from the third distance to a fourth distance, and at the same time, to further rotate along the second rotational direction, taking the first locking member with it, so as to reduce the first circumferential distance to a second circumferential distance.

[0030] In at least some embodiments, when the spindle connector is switched from the rotation return state to the initial state, the spindle connector is configured to continue to move away from the head end, taking the first locking member with it, so as to move the first locking member to a side of the second locking member that is farther away from the head end, and at the same time, continue to rotate along the second rotational direction, taking the first locking member with it, so as to make the second circumferential distance zero.

[0031] In at least some embodiments, there are a plurality of the locking mechanisms, and the plurality of locking mechanisms are provided between the main shaft connector and the housing at equal intervals along a circumferential direction of the main shaft connector.

[0032] In at least some embodiments, the main shaft connector is a tubular member, and the plurality of locking mechanisms include two locking mechanisms disposed symmetrically in a radial direction of the tubular member. According to a second aspect of the present invention, there is provided a clip applier device including a clip applier mechanism as described above. [Brief description of the drawings]

[0033] In order to more clearly explain the technical ideas of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only related to some embodiments of the present invention and do not limit the present invention.

[0034] [Figure 1A] 1 is a schematic diagram of a clip applier device according to an embodiment of the present invention in one state. FIG. [Figure 1B] 1 is a schematic diagram of a clip applier device according to an embodiment of the present invention in another state. FIG. [Diagram 2] FIG. 2 is a schematic assembly diagram of a clip applier mechanism according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic diagram of a clip applier mechanism according to an embodiment of the present invention in an initial state A. FIG. [Figure 3A] FIG. 3A is a partial schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in an initial state A. FIG. [Figure 3B] FIG. 3B is a partial schematic diagram 2 of the clip applier mechanism according to the embodiment of the present invention in the initial state A. [Figure 3C] FIG. 3C is a partial schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in an initial state A. [Figure 3D]FIG. 3D is a cross-sectional schematic diagram of a clip applier mechanism according to an embodiment of the present invention in an initial state A. [Figure 4A] FIG. 4A is a schematic diagram 1 of a configuration of a main shaft connector according to an embodiment of the present invention. [Figure 4B] FIG. 4B is a schematic diagram of a partial configuration of the spindle connector according to the embodiment of the present invention. [Figure 4C] FIG. 4C is a schematic diagram 2 of the configuration of the spindle connector according to the embodiment of the present invention. [Figure 4D] FIG. 4D is a schematic diagram 3 of the configuration of the spindle connector according to the embodiment of the present invention. [Diagram 5] FIG. 5 is a schematic diagram showing a partial configuration of a second housing portion according to an embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram of a partial configuration of the clip applier mechanism according to the embodiment of the present invention in a clip feeding completion state B. FIG. [Figure 7A] FIG. 7A is a partial schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in an adjusted state C. [Figure 7B] FIG. 7B is a partial schematic diagram 2 of the clip applier mechanism in the adjusted state C according to the embodiment of the present invention. [Figure 7C] FIG. 7C is a partial schematic diagram 3 of a clip applier mechanism in an embodiment of the present invention in an adjusted state C. [Figure 8A] FIG. 8A is a partial schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in a completed firing state D. [Figure 8B] FIG. 8B is a partial schematic diagram 2 of the clip applier mechanism according to the embodiment of the present invention in the completed firing state D. [Figure 8C] FIG. 8C is a partial schematic diagram 3 of the clip applier mechanism in the embodiment of the present invention in the completed firing state D. [Figure 9A] FIG. 9A is a schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in a retracted state E. [Figure 9B]FIG. 9B is a schematic diagram 2 of a clip applier mechanism in accordance with an embodiment of the present invention in a retracted state E. [Figure 9C] FIG. 9C is a schematic diagram 3 of a clip applier mechanism in accordance with an embodiment of the present invention in a retracted state E. [Figure 10A] FIG. 10A is a schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in a rotated back state F. [Figure 10B] FIG. 10B is a schematic diagram 2 of the clip applier mechanism according to the embodiment of the present invention in the rotated back state F. [Figure 10C] FIG. 10C is a schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in a rotated back state F. [Figure 10D] FIG. 10D is a partially enlarged schematic diagram of the engagement mechanism in FIG. 10C. [Figure 11] FIG. 11 is a schematic diagram of a percussion connector according to an embodiment of the present invention. [Figure 12] FIG. 12 is a schematic diagram of a partial configuration of a clip applier mechanism according to an embodiment of the present invention. [Figure 13] FIG. 13 is a schematic diagram showing the configuration of an engagement mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] In order to make the purpose, technical idea and advantages of the embodiments of the present invention clearer, the technical idea of ​​the embodiments of the present invention will be described clearly and completely below with reference to the drawings according to the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments that a person skilled in the art can obtain without inventive work belong to the protection scope of the present invention.

[0036] Unless otherwise defined, technical or scientific terms used herein have the common meaning understood by those skilled in the art. The terms "first", "second" and similar terms used in the present patent application specification and claims do not imply any order, quantity or importance, but are merely used to distinguish different components. Similar terms such as "comprise" or "comprises" mean that the element or item described before "comprise" or "comprises" includes the element or item listed after "comprise" or "comprises" and their equivalents, without excluding other elements or items. Similar terms such as "connected" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Top", "bottom", "left", "right", etc. are used merely to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationships may change accordingly.

[0037] Before clamping a blood vessel with a clip, the clip must be delivered into an end effector located at the tip of the clip applier mechanism, and then the handle assembly must be operated to fire the clip. If the clip has already been delivered into the end effector, and the operator finds that the clip is not appropriate (e.g., the size or shape of the clip), the operator must remove the entire clip applier mechanism from the handle assembly and attach another clip applier mechanism with an appropriate clip. During the use of the clip applier device, the size of the clip must be adjusted from time to time, so that the replaced clip applier mechanism may be reattached and used again. Since the end effector of the replaced clip applier mechanism already has a clip in it, when the clip applier mechanism is reattached to the handle assembly, the handle assembly cannot recognize that a clip exists in the end effector. In this case, if another clip is transported into the end effector, the end effector will be damaged and the clip applier mechanism cannot be used for a second time.

[0038] Therefore, embodiments of the present invention provide a clip applier mechanism for a clip applier device and a clip applier device including the same, which aims at least to avoid damage to an end effector when replacing the clip applier mechanism.

[0039] For example, a clip applier mechanism of a clip applier device according to an embodiment of the present invention includes a tube, a spindle, a clip bin assembly, and a clip pusher assembly. The tube includes opposing head and distal ends, the spindle is disposed proximate the distal end and at least partially disposed within the tube, the clip bin assembly extends through the tube and includes a clip bin disposed within the tube and configured to receive a clip, and an end effector protruding from the head end, and the clip pusher assembly is disposed at least partially within the tube and configured to be pushed by the spindle toward the head end to transport a clip in the clip bin into the end effector. The clip applier mechanism further includes a spindle connector, a housing, and a locking mechanism. The spindle connector is fitted over and connected to the spindle and configured to move in the same direction as the spindle in the axial direction of the tube, the housing is configured to receive the spindle and the spindle connector, and the locking mechanism is disposed between the spindle connector and the housing. The locking mechanism, the spindle connector, and the housing are configured such that when the clip is delivered into the end effector, the spindle connector and the housing are locked together by the locking mechanism.

[0040] In the clip applier mechanism according to the embodiment of the present invention, a spindle connector is provided to be connected to the spindle, and a locking mechanism is provided between the spindle connector and the housing, so that when a clip is transported into an end effector, the spindle connector and the housing are locked by the locking mechanism. In this way, when the clip applier mechanism is detached, the positions of the spindle connector and the spindle relative to the housing are locked, so that they cannot move in the axial direction of the tube. This prevents the next clip from being transported to the end effector and the end effector from being damaged when the clip applier mechanism is used for a second time, which is advantageous for long-term use of the clip applier mechanism.

[0041] Hereinafter, the present invention will be described in some specific embodiments. In order to maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components may be omitted. If any component of the embodiments of the present invention appears in more than one drawing, the component may be indicated by the same reference numeral in each drawing.

[0042] 1A and 1B are schematic diagrams of a clip applier device according to an embodiment of the present invention in two states. FIG. 2 is an assembled schematic diagram of a clip applier mechanism according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a clip applier mechanism according to an embodiment of the present invention in an initial state. FIG. 3A is a partial schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in an initial state. FIG. 3B is a partial schematic diagram 2 of a clip applier mechanism according to an embodiment of the present invention in an initial state. FIG. 3C is a partial schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in an initial state.

[0043] 1A and 1B, a clip applier device 900 according to an embodiment of the present invention includes a clip applier mechanism 91 and a handle assembly 92. For example, the clip applier mechanism 91 is detachably connected to the handle assembly 92. When operating the clip applier device 900, an operator can quickly detach or attach the clip applier mechanism 91 from the handle assembly 92 according to actual needs.

[0044] The handle assembly 92 is configured to control and drive the clip applier mechanism 91 to perform operations including, but not limited to, delivering a clip, firing a clip, resetting the firing assembly, and resetting the clip pusher assembly.

[0045] 1B, clip applier mechanism 91 includes a tube 90 having opposed head and distal ends 90A and 90B, i.e., in an axial direction Z of tube 90, head end 90A is opposed to distal end 90B, with head end 90A being the distal end that is farther away from handle assembly 92 or an operator, and distal end 90B being the proximal end that is closer to handle assembly 92 or an operator.

[0046] In an embodiment of the present invention, the extension direction of tube 90 is defined as an axial direction Z including a +Z direction toward head end 90A and a -Z direction away from head end 90A, as shown in Figure 1B. For example, in an embodiment of the present invention, when a part or assembly moves toward head end 90A, it can be understood to move along the +Z direction, and when a part or assembly moves away from head end 90A, it can be understood to move along the -Z direction.

[0047] In the embodiment of the present invention, the circumferential direction of the tube 90 is the direction in which the tube 90 rotates around its rotation axis 90X, and as shown in Fig. 1B, this circumferential direction R includes a first rotation direction +R and a second rotation direction -R that are opposite to each other. For example, when viewed from the head end 90A to the distal end 90B, the first rotation direction +R is a counterclockwise direction, and the second rotation direction -R is a clockwise direction.

[0048] 2 and 3A, the clip applier mechanism 91 includes a spindle 1, a spindle connector 2, a percussion connector 3, a clip bin assembly, a clip pusher assembly, a percussion assembly, a housing 6, a push rod 7, and an end cap 12. The percussion assembly includes, for example, a percussion rod body 4 and a percussion sleeve 5. The clip bin assembly includes, for example, a clip bin 9 and a clamp forceps 11 (also called an end effector). The clip pusher assembly includes, for example, a push block 8 and a clip pusher plate 10.

[0049] In at least some embodiments, the tube 90 is hollow, and at least a portion of the spindle 1, the clip bin assembly, the clip pusher assembly, and the firing assembly are disposed within the tube 90.

[0050] For example, the main shaft 1 is disposed adjacent to the distal end 90B of the tube 90 and at least partially within the tube 90. For example, the main shaft 1 includes opposing first and second ends 1A and 1B, with the first end 1A being adjacent to the head end 90A and the second end 1B being remote from the head end 90A in the axial direction Z. The first end 1A may be located within the tube 90 during actuation of the clip applier mechanism.

[0051] For example, the clip bin assembly extends through the tube 90. A clip bin 9 is provided within the tube 90 for storing a plurality of clips. The clamp forceps 11 protrude from the head end 90A. In one example, a plurality of clips are aligned within the clip bin 9 along the axial direction Z.

[0052] For example, the clip pressing assembly is at least partially disposed within the tube 90 and configured to be pushed toward the head end 90A by the spindle 1 to transport the clips in the clip bin 9 into the clamp forceps 11. In one example, the pressing block 8 is movable toward the head end 90A, taking the clip pressing plate 10 with it to sequentially press the clips in the clip bin 9 into the clamp forceps 11.

[0053] For example, the firing assembly is at least partially located within the tube 90 and configured to be pushed by the shaft 1 toward the head end 90A to close the clamping forceps 11 and fire a clip within the clamping forceps 11.

[0054] For example, the firing sleeve 5 functions as a tube 90, and the clamping forceps 11 protrudes from the head end of the firing sleeve 5. When the firing sleeve 5 moves along the +Z direction, the firing sleeve 5 moves the two clamp arms of the clamping forceps 11 toward each other to close the clamping forceps 11, and the clip is fired at this time. When the firing sleeve 5 moves along the -Z direction, the two clamp arms of the clamping forceps 11 move away from each other to open the clamping forceps 11, and wait for the next clip feed.

[0055] 3B and 3C, the spindle connector 2 is fitted onto the spindle 1 and connected to the spindle 1, and is configured to move in the same direction as the spindle 1 in the axial direction Z. For example, the spindle connector 2 is fitted onto the second end 1B of the spindle 1 and connected to the second end 1B, and when the spindle 1 moves along the +Z or -Z direction, the spindle connector 2 also moves together with the spindle 1 along the +Z or -Z direction.

[0056] 3B and 3C , for example, the clip applier mechanism 91 further includes an axial engagement mechanism 22 provided between the spindle 1 and the spindle connector 2. In one example, the axial engagement mechanism 22 includes an engagement groove 221 provided in the spindle 1, and engagement pins 222a, 222b provided in the spindle connector 2 and configured to move within the engagement groove 221 along the circumferential direction of the spindle 1.

[0057] In this manner, by providing the axial engagement mechanism 22 and engaging and connecting the spindle 1 and the spindle connector 2 with each other in the axial direction of the spindle 1, both can be moved in the same direction and simultaneously in the axial direction Z, while one of the spindle 1 and the spindle connector 2 can be made to perform relative movement, such as relative rotation, with respect to the other in the circumferential direction of the spindle 1.

[0058] For example, the engagement groove 221 is an annular recessed groove extending along the circumferential direction of the main shaft 1, and in this way, the engagement pins 222a, 222b can be rotated 360 degrees within the engagement groove 221. In one example, when the main shaft 1 rotates within the main shaft connector 2, the rotation of the clamping forceps 11 can be controlled to improve the flexibility of the rotation angle of the clamping forceps 11.

[0059] Although the embodiment of the present invention will be described using two engagement pins 222a, 222b as an example, it should be understood that the number of engagement pins may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0060] When there are multiple engagement pins, the multiple engagement pins are arranged at equal intervals around the periphery of the spindle 1, so that the force received by the spindle 1 or the spindle connector 2 can be made uniform, thereby avoiding damage to the spindle 1 and the spindle connector 2 when the clip applier mechanism is operated.

[0061] For example, as shown in FIG. 3C, two engaging pins 222a, 222b are arranged symmetrically in the radial direction of the spindle 1. In this way, the force received by the spindle 1 or the spindle connector 2 can be ensured to be uniform, while the number of engaging pins can be minimized, which saves manufacturing costs and reduces processing difficulty.

[0062] In an embodiment of the present invention, the main shaft 1 may be arranged parallel to the tube body 90, so that the axial direction of the main shaft 1 can be referred to as the axial direction Z of the tube body 90, the circumferential direction of the main shaft 1 can be referred to as the circumferential direction R of the tube body 90, and the radial direction of the main shaft 1 can be referred to as the radial direction P of the tube body 90 shown in FIG. 3D.

[0063] Fig. 3D is a schematic cross-sectional view of a clip applier mechanism according to an embodiment of the present invention in an initial state. Referring to Figs. 2, 3 and 3D, the housing 6 is provided at the end 90B of the tube 90 and configured to accommodate the main shaft 1 and the main shaft connector 2. That is, the main shaft 1 and the main shaft connector 2 are provided in the housing 6. The main shaft 1 and the main shaft connector 2 are movable in the axial direction Z or rotatable in the circumferential direction R within the housing 6.

[0064] As shown in FIG. 2, in the radial direction P of the spindle 1, the spindle connector 2 is located between the spindle 1 and the housing 6. For example, the housing 6 includes a first housing part 61 close to the head end 90A and a second housing part 62 far from the head end 90A and connected to the first housing part 61 in the axial direction Z. The first housing part 61 is configured to be rotatable in the circumferential direction R relative to the second housing part 62. For example, the first housing part 61 is fixedly connected to the clip pressing assembly and the firing assembly, and the operator can adjust the angle of the clamp feeding assembly and the firing assembly by rotating the first housing part 61. The second housing part 62 is fixed relative to the first housing part 61, which is advantageous for realizing a lock between the second housing part 62 and the spindle connector 2.

[0065] In at least some embodiments, the locking mechanisms 21a, 21b are provided between the spindle connector 2 and the housing 6. For example, as shown in FIG. 3A and FIG. 3B, the locking mechanisms 21a, 21b are provided between the spindle connector 2 and the second housing part 62. When a clip is transported into the clamping forceps 11, the spindle connector 2 and the second housing part 62 are locked to each other by the locking mechanisms 21a, 21b. That is, the spindle connector 2 and the second housing part 62 remain fixed in both the axial direction Z and the circumferential direction R, and thus the spindle 1 and the spindle connector 2 cannot move in the Z direction.

[0066] In at least some embodiments, the locking mechanisms 21a, 21b include first locking members 211a, 211b provided on the spindle connector 2 and second locking members 212a, 212b provided on the housing 6. For example, as shown in Figures 3A and 3B, the locking mechanism 21a includes a first locking member 211a provided on the spindle connector 2 and a second locking member 212a provided on the second housing part 62, and the locking mechanism 21b includes a first locking member 211b provided on the spindle connector 2 and a second locking member 212b provided on the second housing part 62. The first locking member 211a and the second locking member 212a are configured such that, when the spindle 1 and the spindle connector 2 move along the +Z direction to press the clip pressing assembly and transport a clip into the clamp forceps 11, the first locking member 211a and the second locking member 212a are locked to each other, and the first locking member 211b and the second locking member 212b are locked to each other.

[0067] During the course of using the clip applier device, a clip of a different model number may be required. For example, if an operator finds that the size of the clip in the clamp forceps 11 is not appropriate, the clip applier mechanism 91 must be removed from the handle assembly 92 and another clip applier mechanism having a clip of the appropriate size must be attached. When the clip applier mechanism 91 is reattached to the handle assembly 92, the handle assembly 92 will not recognize that a clip was already present in the clamp forceps 11, and will transfer the clip in the clip bin 9 back into the clamp forceps 11, damaging the clamp forceps 11 and affecting the secondary use of the clip applier mechanism.

[0068] In the embodiment of the present invention, by using the locking mechanisms 21a, 21b provided between the shaft connector 2 and the housing 6, the shaft 1 and the shaft connector 2 are fixed in the axial direction Z of the tube 90 relative to the housing 6 when a clip is transported into the clamp forceps 11. This prevents the shaft 1 from driving the clip pressing assembly and continuously sending clips to the clamp forceps 11. On the other hand, it is possible to prevent unexpected events such as erroneous firing due to movement of the shaft 1 or the shaft connector during the removal process, thereby improving operational safety.

[0069] As shown in FIG. 2, the main shaft 1 includes opposing first and second ends 1A and 1B, with the first end 1A being close to the head end 90A and the second end 1B being far from the head end 90A in the axial direction Z of the tube body 90.

[0070] FIG. 4A is a schematic diagram 1 of a configuration of a spindle connector according to an embodiment of the present invention, FIG. 4B is a schematic diagram of a portion of the configuration of the spindle connector according to an embodiment of the present invention, FIG. 4C is a schematic diagram 2 of a configuration of the spindle connector according to an embodiment of the present invention, and FIG. 4D is a schematic diagram 3 of a configuration of the spindle connector according to an embodiment of the present invention.

[0071] 2, the spindle connector 2 is a tubular member 20, and at least a portion of the tubular member 20 is fitted onto the second end 1B of the spindle 1. As shown in FIG. 3D, the tubular member 20 has a chamber in which the spindle 1 is provided, and an axial engagement mechanism 22 is provided on the tubular member 20 so that the spindle 1 and the spindle connector 2 are engaged with each other in the Z direction.

[0072] In an embodiment of the present invention, the tubular member 20 (i.e., the main shaft connector 2) may be arranged parallel to the tube 90, so that the extension direction or axial direction of the tubular member 20 can be referred to as the axial direction Z of the tube 90, the circumferential direction of the tubular member 20 can be referred to as the circumferential direction R of the tube 90, and the radial direction of the tubular member 20 can be referred to as the radial direction P of the tube 90.

[0073] 4A, for example, tubular member 20 includes a tube wall 203 that defines a chamber of tubular member 20. Tube wall 203 includes a first end face 201 and a second end face 202 that face each other in the extension direction of tubular member 20, with first end face 201 proximal to head end 90A and second end face 202 distal to head end 90A.

[0074] For example, the first locking member 211a includes a protrusion 2112a extending from the first end face 201 of the tube wall 203 toward the head end 90A and a first hook 2111a provided on the protrusion 2112a, and the first locking member 211b includes a protrusion 2112b extending from the first end face 201 of the tube wall 203 toward the head end 90A and a first hook 2111b provided on the protrusion 2112b.

[0075] In at least some embodiments, the housing 6 includes an inner wall facing the spindle connector 2, and the second locking member includes a second hook provided on the inner wall, and the first hook and the second hook are configured to engage with each other.

[0076] 5 is a schematic diagram of a part of the second housing part according to an embodiment of the present invention. As shown in FIG. 3B and FIG. 5, for example, the second housing part 62 is substantially cylindrical and includes an inner wall 621 facing the main shaft connector 2, the second locking member 212a includes a second hook 2121a provided on the inner wall 621, and the second locking member 212b includes a second hook 2121b provided on the inner wall 621. The first hook 2111a and the second hook 2121a are configured to be engaged with each other, and the first hook 2111b and the second hook 2121b are configured to be engaged with each other.

[0077] In this manner, the mutual engagement between the first hook 2111a and the second hook 2121a realizes the interlocking of the first locking member 211a and the second locking member 212a, and the mutual engagement between the first hook 2111b and the second hook 2121b realizes the interlocking of the first locking member 211b and the second locking member 212b.

[0078] In an embodiment of the present invention, the first hooks 2111a, 2111b are provided on the protrusions 2112a, 2112b extending from the first end face 201, which makes it more advantageous for the protrusions 2112a, 2112b to bounce to a certain extent in the radial direction of the tubular member 20, making it easier for the first hooks 2111a, 2111b to engage with the second hooks 2121a, 2121b.

[0079] As shown in Fig. 4A, if the first hook 2111a is provided directly on the first end surface 201 (instead of on the protrusion 2112a), the first hook 2111a has no room for rebound when the first hook 2111a and the second hook 2121a of Fig. 3B are engaged with each other, so a large force may be required to push the main shaft connect to engage the first hook 2111a with the second hook 2121a. However, in the embodiment of the present invention, the protrusion 2112a extends from the first end surface of the pipe wall 203 by one step, so it is no longer restrained by the pipe wall 203 and has room for rebound, which can reduce the resistance when the first hook 2111a and the second hook 2121a are engaged with each other.

[0080] FIG. 4B shows the positional relationship between the first end surface 201 of the tube wall 203, the first hook 2111a, and the protrusion 2112a. As shown in FIG. 4B, the distance in the Z direction between the end of the protrusion 2112a and the first end surface 201 is D, and the total length of the tubular member 20 in the Z direction is L, and L is 4 to 12 times D. By setting the above parameters, the space occupied by the main shaft connector 2 in the housing is reduced as much as possible, and the structure of the clip applier mechanism is made more compact, on the premise that the first hook and the second hook are guaranteed to be more easily engaged. For example, L is 25 mm to 35 mm, and D is 3 mm to 6 mm, and preferably L is about 30 mm, and D is 4 mm to 6 mm.

[0081] 4A, the tubular member 20 further includes two through grooves 2031, 2032 provided in the tube wall 203. The two through grooves 2031, 2032 extend substantially along the Z direction, and thus the extension directions of the two through grooves 2031, 2032 are parallel to the Z direction.

[0082] In the embodiment of the present invention, the shapes of the two through grooves 2031, 2032 may be the same or different. If they are the same, the manufacturing process is simplified, which is preferable. The embodiment of the present invention will be described taking the case where they are the same as an example.

[0083] 4B is taken as an example, the through groove 2031 includes a slot 2031o opened in the first end face 201. The slot 2031o is in contact with the protrusion 2112a, that is, in the circumferential direction of the tubular member 20, the slot 2031o and the protrusion 2112a are adjacent to each other.

[0084] 3B and 4A, when the first hook 2111a approaches the second hook 2121a so as to be engaged with each other, the protrusion 2112a may move in the radial direction P of the tubular member 20 (i.e., bouncing may occur). In an embodiment of the present invention, the slot 2031o and the protrusion 2112a are adjacent to each other, so that the movement range and bouncing space of the protrusion 2112a can be increased, and the resistance force when the first hook 2111a and the second hook 2121a are engaged with each other can be further reduced.

[0085] 4A, the two through grooves 2031, 2032 are provided on both opposing sides of the protruding portion 2112a, respectively, as two slots, and are provided adjacent to each other on both opposing sides of the protruding portion 2112a in the circumferential direction of the tubular member 20. Similarly, two through grooves are provided on both opposing sides of the protruding portion 2112b along the circumferential direction of the tubular member 20, but their description will be omitted here.

[0086] In at least some examples, clip applier mechanism 91 further includes a return member, e.g., within the housing, for returning clip applier mechanism 91. As shown in Figures 3 and 3D, for example, clip applier mechanism 91 includes a first spring 13a (i.e., a first return member) within first housing portion 61 and a second spring 13b (i.e., a second return member) within second housing portion 62.

[0087] As shown in FIG. 3D, for example, the first spring 13a is fitted onto the firing rod body 4 and abuts between the first housing portion 61 and the firing rod body 4, and is used to reset the firing assembly.

[0088] 3D, for example, the second spring 13b is fitted onto the percussion connector 3 and abuts between the second housing part 62 and the shaft connector 2, and is used to return the grip pressing assembly, the shaft 1, and the shaft connector 2. For example, a step 204 is provided in the shaft connector 2, and the second spring 13b abuts between the inner surface of the second housing part 62 and the step 204 of the shaft connector 2.

[0089] When the clip applier mechanism 91 performs each operation, the clip applier mechanism has a number of different operating states. For ease of understanding, in the embodiment of the present invention, the clip applier mechanism 91 is set to have the following states:

[0090] 1) Initial state A: No external force is applied to either the spindle 1 or the spindle connector 2.

[0091] 2) Clip feeding completion state B: An external force is applied to move the main shaft 1 and the main shaft connector 2 along the +Z direction, and the main shaft 1 pushes the clip pressing assembly to transport the clip into the clamp forceps 11.

[0092] 3) Adjustment state C: An external force is continued to be applied, and the main shaft 1 and the main shaft connector 2 continue to move along the +Z direction, so that the main shaft 1 pushes the firing assembly to adjust the opening and closing angle of the clamp forceps 11.

[0093] 4) Trigger completion state D: The external force is continued to be applied, and the main shaft 1 and the main shaft connector 2 are continued to move along the +Z direction so as to trigger the clip in the clamp forceps 11, and the main shaft connector 2 rotates along the first rotation direction R during the movement process.

[0094] 5) Retracted state E: Apply an external force to move the main shaft 1 and the main shaft connector 2 along the -Z direction, and the main shaft connector 2 moves in the -Z direction, taking the firing assembly with it during the movement process.

[0095] 6) Rotation return state F: Due to the action of the first return member, the main shaft 1 and the main shaft connector 2 move along the -Z direction, and the main shaft connector 2 rotates along the second rotation direction -R during the movement process, and the firing assembly is returned.

[0096] 7) Return to initial state G: Due to the action of the second returning member, the spindle 1 and the spindle connector 2 continue to move along the -Z direction, and the spindle connector 2 rotates along the second rotation direction -R in the process of moving, so that the clip pressing assembly, the spindle 1, and the spindle connector 2 are all returned to their original state.

[0097] In the embodiment of the present invention, the term "external force" refers to a force that is not caused by the part itself, and may refer to a force from outside the clip applier mechanism (e.g., a driving force provided by the handle assembly or a force directly applied to the clip applier mechanism by an operator), or may refer to a force caused by other parts in the clip applier mechanism. For example, when an external force is applied to the spindle connector 2, it may be a pressing force from the pressing rod 7, a force caused by the movement of the spindle 1, or a return force caused by a return member.

[0098] In an embodiment of the present invention, adjustment state C is a selectable state, i.e., clip applier mechanism 91 may or may not have adjustment state C. In some cases, whether clip applier mechanism 91 has an adjustment state may be determined based on the recoil performance of the clip.

[0099] In some embodiments, when the clip has a good rebound performance, the clip applier mechanism 91 may have the adjustment state C. For example, when the width of the clip in the clamp forceps 11 is larger than the diameter of the puncture tool (the puncture tool is, for example, a round pipe having a diameter), the adjustment state C can reduce the opening and closing angle of the clamp forceps 11 to reduce the width of the clip, making it easier for the clip applier mechanism 91 to penetrate the puncture tool. In one example, the clip in the clamp forceps 11 is a plastic clip with a width of about 17.5 mm, and the diameter of the puncture tool is about 10 mm. The adjustment state C can reduce the width of the clip from 17.5 mm to about 10 mm, allowing the clamp forceps 11 of the clip applier mechanism 91 to smoothly penetrate the puncture tool.

[0100] In some other embodiments, when the clip has poor rebound performance, the clip applier mechanism 91 may not have the above-mentioned adjustment state C. For example, when the clip is a metal clip, the elasticity is low, and when the opening and closing angle of the clamp forceps 11 is reduced, the metal clip cannot rebound and cannot be used normally. In one example, the width of the metal clip is about 5.6 mm, which allows the clip to pass through the puncture tool smoothly, so there is no need to adjust the opening and closing angle of the clamp forceps 11.

[0101] In this embodiment, in order to describe each state of the clip applier mechanism in detail, a clip applier mechanism 91 having an adjustment state C will be taken as an example.

[0102] As previously mentioned, the clip applier mechanism 91 in FIGS.

[0103] Fig. 6 is a partial schematic diagram of a clip applier mechanism according to an embodiment of the present invention in a clip feed completion state B. Fig. 7A is a partial schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in an adjustment state C. Fig. 7B is a partial schematic diagram 2 of a clip applier mechanism according to an embodiment of the present invention in an adjustment state C. Fig. 7C is a partial schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in an adjustment state C.

[0104] FIG 8A is a partial schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in a fully-performed state D. FIG 8B is a partial schematic diagram 2 of a clip applier mechanism according to an embodiment of the present invention in a fully-performed state D. FIG 8C is a partial schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in a fully-performed state D.

[0105] Fig. 9A is a schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in a retracted state E. Fig. 9B is a schematic diagram 2 of a clip applier mechanism according to an embodiment of the present invention in a retracted state E. Fig. 9C is a schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in a retracted state E.

[0106] Fig. 10A is a schematic diagram 1 of a clip applier mechanism according to an embodiment of the present invention in a rotated back state F. Fig. 10B is a schematic diagram 2 of a clip applier mechanism according to an embodiment of the present invention in a rotated back state F. Fig. 10C is a schematic diagram 3 of a clip applier mechanism according to an embodiment of the present invention in a rotated back state F.

[0107] It should be noted that when the clip applier mechanism 91 is switched between different states, the positions of parts or components (including but not limited to the spindle connector 2 and the locking mechanisms 21a, 21b) in the clip applier mechanism 91 also change accordingly. For ease of understanding, hereinafter, the spindle connector 2 is also assumed to have an initial state A, a clip feed complete state B, an adjustment state C, a firing complete state D, a retraction state E, a rotation return state F, and an initial state return G to show that it is synchronized with the above seven states of the clip applier mechanism.

[0108] The locking mechanism, the first locking member, the second locking member, the main shaft, the main shaft connector, etc. when the clip applier is in different states will be described below with reference to the drawings.

[0109] 3A and 3B, when the clip applier mechanism is in the initial state A, no external force is applied to the spindle 1 and the spindle connector 2, the spindle connector 2 is in the initial state A, and the locking mechanisms 21a and 21b are in their initial positions. At this time, the first locking member 211a and the second locking member 212a are spaced apart from each other in the Z direction, the first locking member 211a is farther from the head end 90A than the second locking member 212a, and the first locking member 211b and the second locking member 212b are spaced apart from each other in the Z direction, and the first locking member 211b is farther from the head end 90A than the second locking member 212b.

[0110] 6, when the clip applier mechanism 91 is switched from the initial state A to the clip feed completion state B, the spindle connector 2 is switched from the initial state A to the clip feed completion state B, and the locking mechanisms 21a and 21b are changed from the initial positions to the locked positions. In the locked positions, the first locking member 211a and the second locking member 212a are locked to each other, and the first locking member 211b and the second locking member 212b are locked to each other.

[0111] For example, the above-mentioned switching process from the initial state A to the clip forwarding completion state B can be realized by the following method.

[0112] As shown in Figures 3A and 6, an external force is applied to move the spindle 1 and the spindle connector 2 along the +Z direction. During the movement process, the spindle 1 pushes the clip pressing assembly to transport the clip into the clamp forceps 11, and the spindle connector 2 moves along the +Z direction together with the first locking members 211a and 211b, and locks with the second locking members 212a and 212b respectively.

[0113] It should be noted that the second housing portion 62 and the second locking members 212a, 212b remain fixed in all states of the clip applier mechanism 91.

[0114] In the embodiment of the present invention, the circumferential distance in the R direction between the first locking member 211a and the second locking member 212a in the locked state is defined as zero, and the angle in the R direction between the first locking member 211a and the second locking member 212a in the locked state is defined as zero. The definitions of the first locking member 211b and the second locking member 212b are the same as those described above and will not be repeated here.

[0115] 7A and 7B, when the clip applier mechanism 91 is switched from the clip feed completion state B to the adjustment state C, the spindle connector 2 is switched from the clip feed completion state B to the adjustment state C, and the locking mechanisms 21a, 21b are changed from the locked position to the first unlocked position. In the first unlocked position, the first locking member 211a and the second locking member 212a are spaced apart by a first distance d1 in the Z direction, and the first locking member 211b and the second locking member 212b are spaced apart by the first distance d1 in the Z direction.

[0116] For example, the above-mentioned switching process from the clip feeding completion state B to the adjustment state C can be realized in the following manner.

[0117] The external force is continuously applied, and the main shaft 1 and the main shaft connector 2 continue to move along the +Z direction. In the moving process, the main shaft 1 transmits the external force to the percussion sleeve 5, and the percussion sleeve 5 moves along the +Z direction. The movement of the percussion sleeve 5 brings the two clamp arms of the clamp forceps 11 closer to each other so as to reduce the included angle between them, thereby achieving the purpose of adjusting the opening and closing angle of the clamp forceps 11. The main shaft connector 2 continues to move along the +Z direction, taking the first locking members 211a, 211b with it, so as to increase the distance in the Z direction between the first locking members 211a, 211b and the second locking members 212a, 212b to a first distance d1, as shown in FIG. 7A.

[0118] In an embodiment of the present invention, the above adjustment to the clamp forceps 11 is particularly applicable when the clip applier mechanism 91 passes through an elongated piercing tool, to protect the clamp forceps 11 from damage when passing through the piercing tool.

[0119] As shown in Figures 8A and 8B, when the clip applier mechanism 91 is switched from the adjusted state C to the fired state D, the spindle connector 2 is switched from the adjusted state C to the fired state D, and the locking mechanism 21a, 21b is changed from the first unlocked position to the second unlocked position. In the second unlocked position, the first locking member 211a and the second locking member 212a are separated by a second distance d2 in the Z direction, and the first locking member 211b and the second locking member 212b are separated by a second distance d2 in the Z direction, and the first locking member 211b and the second locking member 212b are separated by a first circumferential distance R1 in the circumferential direction R. For example, the second distance d2 is greater than the first distance d1, and the first circumferential distance R1 is greater than zero.

[0120] For example, the switching process from the adjustment state C to the firing completion state D can be realized in the following manner.

[0121] The external force continues to be applied, causing the spindle 1 and the spindle connector 2 to continue to move along the +Z direction, while the spindle connector 2 is rotated along the first rotation direction +R.

[0122] In the process of moving, the main shaft 1 continues to push the firing sleeve 5 to move along the +Z direction so as to close the clamp forceps 11 and fire the clip.

[0123] In the process of movement, the main shaft connector 2 continues to move along the +Z direction with the first locking members 211a and 211b so as to increase the first distance d1 to the second distance d2 as shown in Fig. 8A. At the same time, the main shaft connector 2 further rotates along the first rotation direction +R by a certain angle (for example, this angle a1 is about 32°) with the first locking members 211a and 211b so as to increase the interval between the first locking member 211a and the second locking member 212a in the circumferential direction R to the first circumferential distance R1 and to increase the interval between the first locking member 211b and the second locking member 212b in the circumferential direction R to the first circumferential distance R1. That is, in the circumferential direction R, the first locking member 211a and the second locking member 212a are shifted by a certain rotation angle, and the first locking member 211b and the second locking member 212b are also shifted by the same rotation angle. In the embodiment of the present invention, the circumferential distance between the first locking member and the second locking member when they are locked to each other is set to zero, so the first circumferential distance R1 is greater than zero.

[0124] In the embodiment of the present invention, the first locking member rotates relative to the second locking member and shifts in the circumferential direction by moving and rotating the main shaft connector 2, so that when the firing assembly returns in the -Z direction, the first locking member and the second locking member can be effectively prevented from colliding with each other, and the formation of an obstacle in the returning process of the firing assembly can be prevented.

[0125] When the clip applier mechanism is in the fired state D, the shaft connector 2 and the shaft 1 are furthest from the handle assembly 92. The distance in the Z direction between the first locking member 211a and the second locking member 212a and the distance in the Z direction between the first locking member 211b and the second locking member 212b reach a maximum value.

[0126] As shown in Figures 9A and 9B, when the clip applier mechanism 91 is switched from the firing state D to the retracted state E, the main shaft connector 2 is switched from the firing state D to the retracted state E, and the locking mechanism 21a, 21b is changed from the second unlocked position to the third unlocked position. In the third unlocked position, the first locking member 211a and the second locking member 212a are separated by a third distance d3 in the Z direction, and the first locking member 211b and the second locking member 212b are separated by a third distance d3 in the Z direction, and the first locking member 211b and the second locking member 212b are separated by a first circumferential distance R1 in the R direction. The third distance d3 is smaller than the second distance d2 and larger than zero.

[0127] For example, the switching process from the firing completion state D to the retreat state E can be realized in the following manner.

[0128] An external force is applied to move the spindle 1 and the spindle connector 2 along the -Z direction.

[0129] In the moving process, the main shaft connector 2 moves along the -Z direction with the percussion connector 3, the percussion connector 3 moves along the -Z direction with the percussion rod body 4, and the percussion rod body 4 moves along the -Z direction with the percussion sleeve 5, that is, the percussion sleeve 5 retreats a certain distance. With the retreat of the percussion sleeve 5, the two clamp arms of the clamp forceps 11 are separated from each other, and the included angle between the two clamp arms gradually increases. At the same time, the main shaft connector 2 further moves along the -Z direction with the first locking members 211a and 211b, so that the distance between the first locking member 211a and the second locking member 212a in the Z direction decreases from the second distance d2 to the third distance d3, and the distance between the first locking member 211b and the second locking member 212b in the Z direction decreases from the second distance d2 to the third distance d3.

[0130] In the clip applier device, after the clip is fired, the firing sleeve 5 may get caught on the clamp forceps 11, making it difficult to move the firing sleeve 5 backward (i.e., along the -Z direction) using only the restoring force of the first spring 13a.

[0131] In the embodiment of the present invention, by providing the above-mentioned retreat state, the external force applied to the main shaft connector 2 is finally transmitted to the percussion sleeve 5, and the percussion sleeve 5 is forced to retreat a certain distance (because the main shaft connector 2 can move together with the percussion connector 3, the percussion connector 3 can move together with the percussion rod body 4, and the percussion rod body 4 can move together with the percussion sleeve 5), thus avoiding the problem that the percussion sleeve 5 is stuck and cannot return.

[0132] In an embodiment of the present invention, the third distance d3 and the first distance d1 may be the same or different, and the specific numerical values ​​are determined as needed, and the embodiment of the present invention is not limited thereto.

[0133] As shown in FIG. 10A and FIG. 10B, when the clip applier mechanism 91 is switched from the retreated state E to the rotated back state F, the spindle connector 2 is switched from the retreated state E to the rotated back state F, and the locking mechanisms 21a, 21b are changed from the third unlocked position to the fourth unlocked position. In the fourth unlocked position, the first locking member 211a and the second locking member 212a are separated by a fourth distance d4 in the Z direction, and the two are separated by a second circumferential distance R2 in the R direction, and the first locking member 211b and the second locking member 212b are separated by a fourth distance d4 in the Z direction, and the two are separated by a second circumferential distance R2 in the R direction. The fourth distance d4 is smaller than the third distance d3, and the second circumferential distance R2 is smaller than the first circumferential distance R1 and larger than zero. For example, the fourth distance d4 is equal to zero.

[0134] For example, the above-mentioned switching process from the retreating state E to the rotating back state F can be realized in the following manner.

[0135] Due to the action of the restoring force of the first spring 13a, the spindle 1 and the spindle connector 2 are moved along the -Z direction, and the spindle connector 2 is simultaneously rotated along the second rotation direction -R.

[0136] In the process of movement, as shown in FIG. 10B, the spindle connector 2 moves along the -Z direction with the first locking members 211a and 211b so that the distance between the first locking member 211a and the second locking member 212a in the Z direction decreases from the third distance d3 to the fourth distance d4, and the distance between the first locking member 211b and the second locking member 212b in the Z direction decreases from the third distance d3 to the fourth distance d4, and at the same time, the spindle connector 2 further rotates along the second rotation direction -R with the first locking members 211a and 211b by an angle a2 so that the first circumferential distance R1 decreases to the second circumferential distance R2. The second rotation direction -R is opposite to the first rotation direction +R. For example, the second circumferential distance R2 is smaller than the first circumferential distance R1.

[0137] In the embodiment of the present invention, angle a2 is smaller than angle a1 and greater than zero. Thus, in the rotation return state, the first locking member and the second locking member remain circumferentially offset, preventing the first locking member and the second locking member from colliding with each other when the locking mechanism returns to its initial position.

[0138] For example, angle a2 may be 1 / 2 to 1 / 3 of angle a1. In one example, a1 is about 32° and a2 is about 16°.

[0139] In the embodiment of the present invention, the distance in the Z direction between the first hook of the first locking member and the second hook of the second locking member is defined as the distance in the Z direction between the first locking member and the second locking member, and for example, when the locking mechanism is in the locked state, if the distance in the Z direction between the first hook 2111a and the second hook 2121a in Fig. 3B is zero, the distance in the Z direction between the first locking member 211a and the second locking member 212a in Fig. 6 is also zero. As shown in Figs. 7B, 8B, 9B, and 10B, when the distance in the Z direction between the first hook 2111a and the second hook 2121a is d1, d2, d3, or d4, respectively, the distance in the Z direction between the first locking member 211a and the second locking member 212a is also d1, d2, d3, or d4. 7B, 8B, 9B and 10B, the first hook 2111a is closer to the head end 90A than the second hook 2121a in the Z direction. In one example, the fourth distance d4 may be equal to zero.

[0140] When the clip applier mechanism 91 is returned from the rotated back state F in FIG. 10A to the initial state A in FIG. 3A, the spindle connector 2 is returned from the rotated back state F to the initial state A, and the locking mechanisms 21a, 21b are changed from the fourth unlocked position to their initial positions.

[0141] For example, the above-mentioned switching process from the rotation return state F to the initial state A can be realized in the following manner.

[0142] Due to the action of the restoring force of the second spring 13b, the spindle 1 and the spindle connector 2 continue to move along the -Z direction, while the spindle connector 2 simultaneously continues to rotate along the second rotation direction -R until it returns to its initial position.

[0143] In the process of movement, the main shaft connector 2 continues to move along the -Z direction with the first locking members 211a, 211b so as to move the first locking members 211a, 211b to the side farther away from the head ends 90A of the second locking members 212a, 212b, thereby causing the locking mechanisms 21a, 21b to return to their initial positions. Compared to the case in Fig. 7B, Fig. 8B, Fig. 9B and Fig. 10B where the first hook 2111a is closer to the head end 90A than the second hook 2121a, in Fig. 3B, the first hook 2111a has returned to its initial position, so the first locking members 211a, 211b are located on the side farther away from the head ends 90A of the second locking members 212a, 212b.

[0144] At the same time, the spindle connector 2 continues to rotate the first locking members 211a, 211b along the second rotational direction −R by an angle a3 to reduce the second circumferential distance R2 to zero.

[0145] In the embodiment of the present invention, the angle a3 is the angle a1 minus the angle a2, i.e. a3=a1-a2. In this way, both the first locking member and the second locking member can be rotated back to the initial position. For example, the angle a3 is about 16°.

[0146] The embodiment of the present invention will be described using two locking mechanisms 21a, 21b as an example, however, it should be understood that the number of locking mechanisms may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0147] When there are multiple locking mechanisms, the multiple locking mechanisms are provided at equal intervals along the circumferential direction of the spindle connector 2 between the spindle connector 2 and the housing 6, thereby making the force received by the spindle connector 2 or the housing 6 uniform and improving the effect of locking in a predetermined position.

[0148] For example, the spindle connector 2 is a tubular member 20, and the two locking mechanisms 21a, 21b are arranged symmetrically in the radial direction of the tubular member 20. In this way, the force received by the spindle connector 2 or the housing 6 can be ensured to be uniform, while the number of locking mechanisms can be minimized, which saves manufacturing costs and reduces processing difficulty.

[0149] In the clip applier device, after the clip is fired, the firing sleeve may get caught on the clamp forceps. When the firing sleeve gets caught, it becomes difficult to retract and return the firing sleeve only by the restoring force of the restoring member, which affects the next clip transport and clip firing operations.

[0150] Accordingly, another embodiment of the present invention aims to provide a clip applier mechanism of a clip applier apparatus that at least forces the firing sleeve to retract a distance after a clip has been fired to assist in the return of the firing sleeve.

[0151] For example, a clip applier mechanism of a clip applier device according to another embodiment of the present invention includes a tube, a shaft, a clip bin assembly, a clip pusher assembly, and a firing assembly, the tube having opposed head and distal ends, the shaft disposed proximate the distal end and at least partially disposed within the tube, the clip bin assembly extending through the tube and including a clip bin disposed within the tube and configured to receive a clip, and an end effector extending from the head end, the clip pusher assembly disposed at least partially within the tube and configured to be pushed by the shaft toward the head end to transport a clip in the clip bin into the end effector, and the firing assembly disposed at least partially within the tube and configured to be pushed by the shaft toward the head end to close the end effector and fire the clip in the end effector. Additionally, the clip applier mechanism further includes a shaft connector, a firing connector, and an engagement mechanism. The shaft connector is connected to the shaft, the percussion connector is connected to the percussion assembly, and the engagement mechanism is disposed between the shaft connector and the percussion connector, and the engagement mechanism, the percussion connector, the shaft connector, and the percussion assembly are configured such that after the clip is fired, the shaft connector moves away from the head end, taking the percussion connector with it by the engagement mechanism, and the percussion connector moves in the same direction, taking the percussion assembly with it, to partially open the end effector.

[0152] In the clip applier mechanism according to the embodiment of the present invention described above, a main shaft connector is provided to be connected to the main shaft, and a firing connector is provided to be connected to the main shaft connector and the firing assembly, respectively. After the clip is fired, the main shaft connector, the engagement mechanism and the firing connector are used to pull the firing assembly back along the direction away from the head end, which is favorable for the return of the firing sleeve and avoids affecting the subsequent operation.

[0153] Next, the above-mentioned clip applier mechanism and clip applier device will be described with reference to Figures 1A to 10C. In order to maintain the clarity and conciseness of the present invention, the same parts as those in the above-mentioned embodiment will be omitted from the redundant description, and the related configurations and arrangements can be referred to the description of the above-mentioned embodiment.

[0154] As shown in FIGS. 1A, 1B and 2, a clip applier device 900 according to yet another embodiment of the present invention includes a clip applier mechanism 91 and a handle assembly 92.

[0155] For example, clip applier mechanism 91 is removably connected to handle assembly 92. Clip applier mechanism 91 includes tube 90, shaft 1, shaft connector 2, percussion connector 3, clip bin assembly, clip pusher assembly, percussion assembly, housing 6, push rod 7, and end cap 12. The percussion assembly includes, for example, percussion rod body 4 and percussion sleeve 5. The clip bin assembly includes, for example, clip bin 9 and clamp forceps 11 (also referred to as end effector). The clip pusher assembly includes, for example, push block 8 and clip pusher plate 10.

[0156] For example, the tube 90 includes opposing head end 90A and distal end 90B. The shaft 1 is disposed adjacent to the distal end 90B and is at least partially located within the tube 90. The clip bin assembly extends through the tube 90 and includes a clip bin disposed within the tube 90 and configured to hold clips therein, and a clamp forceps 11 protruding from the head end 90A. The clip pushing assembly is disposed at least partially within the tube 90 and configured to be pushed toward the head end 90A by the shaft 1 to transport a clip in the clip bin into the clamp forceps 11. The firing assembly is disposed at least partially within the tube 90 and configured to be pushed toward the head end 90A by the shaft 1 to close the clamp forceps 11 and fire a clip in the clamp forceps 11.

[0157] As shown in Figures 3B, 3C, 4A, 7C, 8C, 9C and 10C, for example, the grip applier mechanism 91 further includes engagement mechanisms 31a, 31b provided between the spindle connector 2 and the percussion connector 3. After the clip is fired, the spindle connector 2 moves along the -Z direction with the percussion connector 3 by the engagement mechanisms 31a, 31b, and the percussion connector 3 moves along the same direction with the percussion assembly, causing the clamp forceps 11 to be partially opened.

[0158] As shown in FIG. 3C, for example, the spindle connector 2 and the spindle 1 are connected by an axial engagement mechanism 22.

[0159] As shown in FIGS. 2, 3 and 3A, for example, the firing assembly includes a firing sleeve 5 and a firing rod body 4 positioned at least partially within the firing sleeve 5.

[0160] For example, the firing sleeve 5 is used as the tube 90 and is connected to the firing rod body 4, so that when the firing rod body 4 moves in the Z direction, the firing sleeve 5 also moves in the Z direction. For example, when the firing rod body 4 moves along the -Z direction, it can retract along the -Z direction taking the firing sleeve 5 with it, thereby partially opening the clamp forceps 11.

[0161] For example, the percussion rod body 4 is connected to the percussion connector 3, and thus, when the percussion connector 3 moves in the Z direction, the percussion rod body 4 also moves in the Z direction. For example, when the percussion connector 3 moves along the -Z direction, it can move back along the -Z direction, taking the percussion rod body 4 with it.

[0162] For example, the firing rod body 4 includes a first rod-shaped portion 4A close to the head end 90A and a second rod-shaped portion 4B far from the head end 90A in the extending direction. The firing sleeve 5 is fitted onto and connected to the first rod-shaped portion 4A, and the firing connector 3 is fitted onto and connected to the second rod-shaped portion 4B.

[0163] In the present embodiment, the term "rod body" or "rod-like portion" does not mean that the rod body or rod-like portion is a solid structure, but rather that the rod body or rod-like portion has an elongated shape. For example, as shown in FIG. 3D, the firing rod body 4 may be hollow to form a chamber capable of receiving the main shaft 1.

[0164] As shown in Figures 3B, 3C, 4A, 7C, 8C, 9C and 10C, the engagement mechanism 31a includes an engagement pin 311a (i.e., a first engagement member) provided on the spindle connector 2 and an engagement groove 312a (i.e., a second engagement member) provided on the percussion connector 3, and the engagement mechanism 31b includes an engagement pin 311b (i.e., a first engagement member) provided on the spindle connector 2 and an engagement groove 312b (i.e., a second engagement member) provided on the percussion connector 3.

[0165] For example, the engagement mechanisms 31a, 31b have a spaced state, a released state, and a locked state.

[0166] In the separated state, engagement pin 311a and engagement groove 312a are separated from each other, and engagement pin 311a is located outside engagement groove 312a, and engagement pin 311b and engagement groove 312b are separated from each other, and engagement pin 311b is located outside engagement groove 312b. As shown in Figures 3 to 3C, for example, when clip applier mechanism 91 is in initial state A, engagement mechanisms 31a, 31b are in the separated state.

[0167] In the released state, the engagement pins 311a, 311b are located in the engagement grooves 312a, 312b, respectively, and can be disengaged from the engagement grooves 312a, 312b. As shown in Figures 6, 7C, and 10C, when the clip applier mechanism 91 is in the clip feed completion state B, the adjustment state C, or the rotation return state F, the engagement mechanisms 31a, 31b are in the released state.

[0168] In the locked state, the engagement pins 311a, 311b are locked to each other in the engagement grooves 312a, 312b, respectively. In the locked state, the relative positions of the main shaft connector 2 and the percussion connector 3 remain fixed in either the Z direction or the R direction, so that the main shaft connector 2 can move in the Z direction together with the percussion connector 3. As shown in Figures 8C and 9C, when the clip applier mechanism 91 is in the percussion completion state D or the retracted state E, the engagement mechanisms 31a, 31b are in the locked state.

[0169] After the clip is fired (i.e., in the firing completion state D and the retracted state E), the engagement mechanisms 31a and 31b are in a locked state, and the percussion connector 3 and the main shaft connector 2 are locked to each other. Then, by applying an external force to the main shaft connector 2, the main shaft connector 2 is moved in the -Z direction, and the percussion connector 3 is retracted in the -Z direction along with the main shaft connector 2, and finally the percussion sleeve 5 is also retracted. By setting the engagement mechanisms 31a and 31b to be in a locked state in the firing completion state D and the retracted state E, it is ensured that the percussion connector 3 and the main shaft connector 2 do not separate from each other at least in the firing process and the retracted process, and the occurrence of unexpected events in the above two processes is avoided.

[0170] In the embodiment of the present invention, the engagement mechanisms 31a and 31b may have the same or different configurations, and it is preferable that they are the same because this simplifies the manufacturing process. The embodiment of the present invention will be described taking as an example a case where the engagement mechanisms 31a and 31b have the same configuration.

[0171] Fig. 10D is a partially enlarged schematic diagram of the engagement mechanism in Fig. 10C. The following describes engagement mechanism 31a as an example. As shown in Fig. 10D, engagement groove 312a includes release position 312p1 and lock position 312p2, and engagement pin 311a is movable between release position 312p1 and lock position 312p2.

[0172] For example, when the engagement mechanism 31a is in a locked state, the engagement pin 311a is located at a locked position 312p2. When the engagement mechanism 31a is in a released state, the engagement pin 311a is located at a released position 312p1 and can be disengaged from the engagement groove 312a. When the engagement mechanism 31a is in a disengaged state, the engagement pin 311a is located outside the engagement groove 312a and is therefore not located at the released position 312p1 or the locked position 312p2.

[0173] The engagement mechanism, the percussion connector, the spindle connector, etc., when the clip applier mechanism is in different states will now be described with reference to the drawings.

[0174] 3A to 3C, when the clip applier mechanism 91 is in the initial state A, the spindle connector 2 is in the initial state A, the engagement mechanism 31a is in the separated state, and the engagement pin 311a is located outside the engagement groove 312a. For example, the engagement pin 311a is located on the side of the engagement groove 312a farther away from the head end 90A.

[0175] 6, when the clip applier mechanism 91 is switched from the initial state A to the clip feed completion state B, the spindle connector 2 moves along the +Z direction to move the engagement pin 311a to the release position 312p1 of the engagement groove 312a, and moves along the +Z direction with the engagement pin 311a, thereby releasing the engagement mechanism 31a. By moving the engagement pin 311a to the release position 312p1 of the engagement groove 312a, it is advantageous that when the spindle connector 2 is subsequently pushed along the +Z direction, the percussion connector 3 can be pushed along the +Z direction at the same time.

[0176] As shown in FIGS. 7A to 7C, when the clip applier mechanism 91 is switched from the clip feeding completion state B to the adjustment state C, the spindle connector 2 continues to move along the +Z direction with the engagement pin 311a.

[0177] 8A to 8C, when the clip applier mechanism 91 is switched from the adjustment state C to the firing completion state D, the spindle connector 2 continues to move along the +Z direction and rotates along the first rotation direction +R at the same time. Accompanied by the spindle connector 2, the engagement pin 311a also continues to move along the +Z direction and rotates along the first rotation direction +R from the release position 312p1 to the lock position 312p2 at the same time. At this time, the engagement mechanism 31a is in a locked state, and the relative position between the spindle connector 2 and the firing connector 3 is locked, preparing for the subsequent retreat of the firing assembly.

[0178] As shown in Figures 9A to 9C, when the clip applier mechanism 91 is switched from the firing completion state D to the retreated state E, the main shaft connector 2 moves along the -Z direction with the firing connector 3, the firing connector 3 moves along the -Z direction with the firing rod body 4, the firing rod body 4 moves along the -Z direction with the firing sleeve 5, and finally, the firing sleeve 5 retreats a certain distance. Through the above operation, the firing sleeve 5 can be forcibly retreated by an external force, which solves the problem that the firing sleeve 5 is caught by the clamp forceps 11. At this time, the engagement mechanism 31a remains in the locked state.

[0179] 10A to 10C, when the clip applier mechanism 91 is switched from the retracted state E to the rotated back state F, the spindle connector 2 moves along the -Z direction and simultaneously rotates along the second rotation direction -R. Accompanied by the spindle connector 2, the engagement pin 311a also moves along the -Z direction and simultaneously rotates back along the second rotation direction -R from the locked position 312p2 to the released position 312p1. At this time, the engagement mechanism 31a is in the released state.

[0180] Next, when the clip applier mechanism 91 returns from the rotation return state F in Fig. 10A to the initial state A in Fig. 3A, the spindle connector 2 continues to move along the -Z direction and simultaneously continues to rotate along the second rotation direction -R. Accompanied by the spindle connector 2, the engagement pin 311a also continues to move along the -Z direction and simultaneously separates from the engagement groove 312a. At this time, the engagement mechanism 31a is in the initial separated state.

[0181] As can be seen from the above process, the embodiment of the present invention utilizes the shaft connector 2, the percussion connector 3 and the engagement mechanism 31 to forcibly return the percussion sleeve 5 a certain distance after the percussion is completed, effectively avoiding the problem of the percussion sleeve 5 being caught by the clamping forceps 11 and being difficult to return, and ensuring that the percussion sleeve can return more smoothly.

[0182] As shown in Fig. 8C, for example, the percussion connector 3 is a tubular member, the engagement grooves 312a, 312b are through-grooves provided in the tubular member, the slots of the engagement grooves 312a, 312b are opened toward the -Z direction, and the release position 312p1 is located at the bottom of the engagement grooves 312a, 312b. By opening the slots of the engagement grooves 312a, 312b toward the -Z direction, it is advantageous for the engagement pins 311a, 311b to quickly enter the release position of the engagement grooves when moving along the +Z direction. In one example, the engagement grooves 312a, 312b are L-shaped grooves.

[0183] Although the embodiment of the present invention will be described using two engagement mechanisms 31a, 31b as an example, it should be understood that the number of engagement mechanisms may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0184] When there are multiple engaging mechanisms, the multiple engaging mechanisms are provided between the main shaft connector 2 and the percussion connector 3 at equal intervals along the circumferential direction of the main shaft connector 2, so that the force received by the main shaft connector 2 or the percussion connector 3 can be made uniform, and the effect of engagement can be improved.

[0185] For example, the spindle connector 2 is a tubular member 20, and the two engaging mechanisms 31a, 31b are arranged symmetrically in the radial direction of the tubular member 20, thus ensuring that the force received by the spindle connector 2 or the percussion connector 3 is uniform, while minimizing the number of engaging mechanisms, thereby saving manufacturing costs and reducing processing difficulty.

[0186] As shown in FIG. 2 and FIG. 3C, the clip applier mechanism 91 further includes an axial engagement mechanism 32 provided between the percussion connector 3 and the percussion rod body 4. The percussion connector 3 and the percussion rod body 4 are engaged with each other in the axial direction of the percussion connector 3 by the axial engagement mechanism 32, but are configured to be movable relative to each other in the circumferential direction of the percussion connector 3.

[0187] In the embodiment of the present invention, the percussion connector 3 and the tube 90 may be arranged parallel to each other, so that the axial direction of the percussion connector 3 can be referred to as the axial direction Z of the tube 90, the circumferential direction of the percussion connector 3 can be referred to as the circumferential direction R of the tube 90, and the radial direction of the percussion connector 3 can be referred to as the radial direction P of the tube 90 shown in FIG. 3D.

[0188] 11 is a schematic diagram of the configuration of the percussion connector according to the embodiment of the present invention. As shown in Fig. 2 and Fig. 11, for example, the axial engagement mechanism 32 includes an engagement groove 321 provided in the percussion rod body 4 and snaps 322a and 322b provided in the percussion connector 3. The snaps 322a and 322b are configured to move in the engagement groove 321 along the circumferential direction of the percussion connector 3.

[0189] In the embodiment of the present invention, the axial engagement mechanism 32 is provided between the percussion connector 3 and the percussion rod body 4. This is advantageous for the percussion connector 3 to move in the Z direction together with the percussion rod body 4 while maintaining the relative positions of the percussion connector 3 and the percussion rod body 4 in the Z direction. Meanwhile, the percussion rod body 4 can rotate in the R direction relative to the percussion connector 3, which is advantageous for the rotation of the percussion assembly or the clip pressing assembly, and therefore the rotation angle of the clamp forceps 11 or the percussion sleeve 5 can be controlled.

[0190] For example, the percussion connector 3 can be connected to the first housing part 61 by another engagement mechanism, and when the first housing part 61 rotates, the percussion connector 3 rotates with it, thereby controlling the rotation angle of the clamp forceps 11 or the percussion sleeve 5.

[0191] For example, the engagement groove 321 is an annular recessed groove extending along the circumferential direction. In this manner, the snaps 322a and 322b can be rotated 360 degrees in the engagement groove 321, improving the flexibility of the rotation angle.

[0192] Although the embodiment of the present invention will be described using two snaps 322a, 322b as an example, it should be understood that the number of snaps may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0193] When there are multiple snaps, the snaps are arranged at equal intervals around the circumference of the percussion connector 3, so that the force received by the percussion connector 3 or the percussion rod body 4 can be uniformed, and the percussion connector 3 or the percussion rod body 4 can be prevented from being damaged when the clip applier mechanism is operated.

[0194] As shown in FIG. 3C, for example, the percussion connector 3 is a tubular member, and two snaps 322a, 322b are arranged symmetrically in the radial direction of the tubular member, thus ensuring that the force received by the percussion connector 3 or the percussion rod body 4 is uniform, while minimizing the number of snaps, thereby saving the manufacturing cost and reducing the processing difficulty.

[0195] As shown in FIG. 2 , for example, the housing 6 is used to accommodate at least a portion of the shaft 1, the shaft connector 2, and the percussion connector 3, i.e., the shaft 1, the shaft connector 2, and the percussion connector 3 are all located within the housing 6.

[0196] In at least some embodiments, the clip applier mechanism 91 further includes a circumferential engagement mechanism 33 disposed between the percussion connector 3 and the housing 6. The percussion connector 3 and the housing 6 are engaged with each other in the R direction by the circumferential engagement mechanism 33, but are allowed to move relative to each other in the Z direction. For example, the percussion connector 3 can move in the +Z direction or the -Z direction relative to the housing 6.

[0197] 3C and 5, for example, the circumferential engagement mechanism 33 is provided between the percussion connector 3 and the second housing part 62. The circumferential engagement mechanism 33 includes a plurality of protrusions 331 (i.e., snaps, as shown in FIG. 5) provided on the second housing part 62 and a plurality of grooves 332 (i.e., engagement grooves, as shown in FIG. 11) provided on the percussion connector 3, and the plurality of protrusions 331 and the plurality of grooves 332 are provided in one-to-one correspondence and configured to be engaged with each other.

[0198] For example, the second housing part 62 includes an opening 622 located on the side close to the head end 90A in the axial direction, and a plurality of protrusions 331 are equally spaced along the periphery of the opening 622. A plurality of grooves 332 are located on the outer surface of the percussion connector 3 and are equally spaced along the circumferential direction of the percussion connector 3. In this way, the percussion connector 3 and the second housing part 62 receive a more uniform force when connected to each other.

[0199] In the embodiment of the present invention, the percussion connector 3 and the second housing part 62 are relatively fixed in the R direction by providing a plurality of protrusions 331 and a plurality of grooves 332, so that the percussion connector 3 can be ensured not to rotate when the percussion sleeve 5 is advanced in the +Z direction or retreated in the -Z direction, and the safety of the operation can be improved.

[0200] Although the embodiment of the present invention is described by taking a plurality of protrusions and a plurality of grooves as an example, it should be understood that the number of protrusions and grooves can be set according to actual needs, and the present invention is not limited thereto. Also, although the embodiment of the present invention is described by taking a protrusion and grooves as an example, it should be understood that in other embodiments, engagement grooves and engagement pins can also be used, and the present invention is not limited thereto.

[0201] In the clip applier device, the handle assembly is used to drive the clip applier mechanism to perform various operations, such as delivering a clip, firing a clip, resetting the firing assembly, resetting the clip pressing assembly, etc. When the clip applier mechanism performs the above operations, the main shaft moves axially relative to the housing, and the main shaft connector is also accompanied by the main shaft to reach different positions. To ensure the operational stability and safety of the clip applier device, it is necessary to ensure that the main shaft or the main shaft connector is quickly and accurately positioned when performing each operation.

[0202] Therefore, another embodiment of the present invention aims to provide a clip applier mechanism of a clip applier device, which can guide at least the main shaft and the main shaft connector during the moving process, and can ensure that the main shaft and the main shaft connector are quickly and accurately positioned, thereby ensuring the operational stability and safety of the clip applier mechanism.

[0203] For example, a clip applier mechanism of a clip applier device according to yet another embodiment of the present invention includes a tube, a shaft, a clip bin assembly, a clip pusher assembly, and a firing assembly, the tube having opposing head and distal ends, the shaft disposed proximate the distal end and at least partially disposed within the tube, the clip bin assembly extending through the tube and including a clip bin disposed within the tube and configured to hold a clip, and an end effector extending from the head end, the clip pusher assembly disposed at least partially within the tube and configured to be pushed by the shaft toward the head end to transport a clip in the clip bin into the end effector, and the firing assembly disposed at least partially within the tube and configured to be pushed by the shaft toward the head end to close the end effector and fire the clip in the end effector. The clip applier mechanism further includes a shaft connector, a housing, and a first guide mechanism. The spindle connector is fitted onto and connected to the spindle, the housing is configured to accommodate the spindle and the spindle connector, the spindle connector is configured to move relative to the housing in the axial direction of the tube and the circumferential direction of the tube, and the first guide mechanism is provided between the spindle connector and the housing and configured to guide the movement of the spindle connector relative to the housing.

[0204] In the clip applier mechanism according to the embodiment of the present invention described above, a first guide mechanism is provided between the main shaft connector and the housing, so that the main shaft connector is guided by the first guide mechanism during the moving or rotating process, and the main shaft connector is also connected to the main shaft, so that it is possible to ensure that both the main shaft and the main shaft connector are quickly and accurately positioned when the clip applier mechanism performs each operation.

[0205] Next, the above-mentioned clip applier mechanism and clip applier device will be described with reference to Figures 1A to 11. In order to maintain the clarity and conciseness of the present invention, the same parts as those in the above-mentioned embodiment will not be described in detail, and the related configurations and arrangements may refer to the description of the above-mentioned embodiment.

[0206] As shown in FIGS. 1A, 1B and 2, a clip applier device 900 according to yet another embodiment of the present invention includes a clip applier mechanism 91 and a handle assembly 92.

[0207] For example, clip applier mechanism 91 is removably connected to handle assembly 92. Clip applier mechanism 91 includes tube 90, shaft 1, shaft connector 2, percussion connector 3, clip bin assembly, clip pusher assembly, percussion assembly, housing 6, push rod 7, and end cap 12. The percussion assembly includes, for example, percussion rod body 4 and percussion sleeve 5. The clip bin assembly includes, for example, clip bin 9 and clamp forceps 11 (also referred to as end effector). The clip pusher assembly includes, for example, push block 8 and clip pusher plate 10.

[0208] For example, the tube 90 includes opposing head end 90A and distal end 90B. The shaft 1 is disposed adjacent to the distal end 90B and at least partially disposed within the tube 90. The clip bin assembly extends through the tube 90 and includes a clip bin disposed within the tube 90 and configured to hold clips therein, and a clamp forceps 11 protruding from the head end 90A. The clip pushing assembly is disposed at least partially within the tube 90 and configured to be pushed toward the head end 90A by the shaft 1 to transport a clip in the clip bin into the clamp forceps 11. The firing assembly is disposed at least partially within the tube 90 and configured to be pushed toward the head end 90A by the shaft 1 to close the clamp forceps 11 and fire a clip in the clamp forceps 11.

[0209] For example, the spindle connector 2 is fitted onto the spindle 1 and connected to the spindle 1. The housing 6 is configured to accommodate at least a portion of the spindle 1 and the spindle connector 2. The spindle connector 2 is configured to be movable relative to the housing 6 in the axial direction of the tube 90 (e.g., the Z direction shown in the figure) and in the circumferential direction of the tube 90 (e.g., the R direction shown in the figure).

[0210] As shown in FIGS. 3A, 3B, and 5, for example, the clip applier mechanism 91 further includes first guide mechanisms 41a, 41b provided between the spindle connector 2 and the housing 6, and the first guide mechanisms 41a, 41b are configured to guide the movement of the spindle connector 2 relative to the housing 6, for example, to guide the movement of the spindle connector 2 relative to the housing 6 in the R direction and the Z direction.

[0211] As shown in Figures 3A, 3B, 4A to 4D, and 5, the first guide mechanism 41a includes a first guide 412a provided in the housing 6 and a first guide groove 411a provided in the spindle connector 2. The first guide mechanism 41b includes a first guide 412b provided in the housing 6 and a first guide groove 411b provided in the spindle connector 2. The first guide groove 411a may be mutually engaged with the first guide 412a, and the first guide groove 411b may be mutually engaged with the first guide 412b.

[0212] For example, the first guides 412a, 412b are both provided on the second housing part 62 of the housing 6. When the clip applier mechanism 91 performs each operation, the second housing part 62 remains fixed, and the spindle connector 2 moves or rotates relative to the second housing part 62. By providing the first guide grooves 411a, 411b on the spindle connector 2 and the first guide 412a on the second housing part 62, the mutual engagement between the first guides 412a, 412b and the first guide grooves 411a, 411b can guide the trajectory of the movement of the spindle connector 2 in the Z direction or R direction, thereby quickly and accurately positioning the spindle 1 and the spindle connector 2.

[0213] In the embodiment of the present invention, the configurations of the two first guide mechanisms 41a, 41b may be the same or different. If they are the same, the manufacturing process is simplified, which is preferable. In the embodiment of the present invention, an example in which the two are the same will be described. The following description will be given using the first guide mechanism 41a as an example.

[0214] For example, the spindle connector 2 has an initial state A and a number of non-initial states including, for example, a clip feed complete state B, an adjustment state C, a firing complete state D, a retraction state E, and a rotation return state F.

[0215] In the embodiment of the present invention, the initial state A, the clip feed completion state B, the adjustment state C, the firing completion state D, the retracted state E, and the rotation return state F of the main shaft connector 2 correspond to the initial state A, the clip feed completion state B, the adjustment state C, the firing completion state D, the retracted state E, and the rotation return state F of the clip applier mechanism 91 described in the above-mentioned embodiment, and the description will not be repeated here.

[0216] As shown in FIG. 3A, when the spindle connector 2 is in the initial state A, no external force is applied to the spindle connector 2, and the first guide 412a is located outside the first guide groove 411a.

[0217] When the spindle connector 2 is in each of the clip feed completion state B, the adjustment state C, the firing completion state D, the retreat state E or the rotation return state F, an external force is applied to the spindle connector 2, so that the first guide 412a is located in the first guide groove 411a and moves between different positions in the first guide groove 411a.

[0218] In at least some embodiments, the first guide groove 411a includes a plurality of different positions that correspond one-to-one to a plurality of different states, and when the spindle connector 2 is in one of the plurality of different states, the first guide 412a is in a position of the first guide groove 411a that corresponds to that state.

[0219] As shown in Figures 6, 7A, 8A, 9A and 10A, for example, the first guide groove 411a has five different positions, a first position S1, a second position S2, a third position S3, a fourth position S4 and a fifth position S5, which correspond to a clip feed completion state B, an adjustment state C, a firing completion state D, a retreat state E and a rotation return state F, respectively.

[0220] When the first guide 412a is in any one of the first position S1, the second position S2, the third position S3, the fourth position S4 and the fifth position S5, the spindle connector 2 is in a state corresponding to the above positions, among the clip feed completion state B, the adjustment state C, the firing completion state D, the retreat state E and the rotation return state F.

[0221] For example, the first guide groove 411a has multiple walls connected to each other, and a certain angle is formed between two adjacent walls so as to form the second position S2, the third position S3, the fourth position S4 and the fifth position S5 described above.

[0222] 12 is a schematic diagram of a part of a clip applier mechanism according to an embodiment of the present invention. As shown in FIG. 12, for example, the first guide groove 411a includes a first wall W1, a second wall W2, a third wall W3, a fourth wall W4, and a fifth wall W5, and two adjacent walls among the first wall W1, the second wall W2, the third wall W3, the fourth wall W4, and the fifth wall W5 form a certain angle so as to define the second position S2, the third position S3, the fourth position S4, and the fifth position S5. In this way, after the first guide 412a enters the first guide groove 411a, it is guided by the first wall W1, the second wall W2, the third wall W3, the fourth wall W4, and the fifth wall W5, so that the first guide 412a arrives at the first position S1, the second position S2, the third position S3, the fourth position S4, and the fifth position S5 in order.

[0223] 12, for example, the first guide groove 411a further includes a first slot 411a1 and a second slot 411a2, which are respectively used as an inlet and an outlet of the first guide groove 411a. That is, the first guide 412a enters the first guide groove 411a from the first slot 411a1 and leaves the first guide groove 411a from the second slot 411a2.

[0224] As described above, when the shaft connector 2 is switched from the adjustment state C to the firing completion state D, the shaft connector 2 rotates along the first rotation direction +R by an angle a1, and when the shaft connector 2 is switched from the retreat state E to the rotation return state F, the shaft connector 2 rotates along the second rotation direction -R by an angle a2. If the first guide groove 411a has only one slot (for example, only the first slot 411a1), and this slot serves as both an entrance and an exit, the rotation return angle a2 of the shaft connector 2 needs to be equal to the rotation angle a1 to leave the first slot 411a1. However, with such an arrangement, the first locking members 211a, 211b are likely to be locked by the second locking members 212a, 212b before the shaft connector 2 returns to its initial position.

[0225] Therefore, in the embodiment of the present invention, the first guide groove has two slots, which are used as an inlet and an outlet, respectively, to prevent erroneous locking by the locking mechanism during the return process of the spindle connector 2.

[0226] 12, the first slot 411a1 and the second slot 411a2 are both located on the same side of the first guide groove 411a, close to the head end 90A, which is more advantageous for the return of the spindle connector 2.

[0227] 3A, 6, and 12, when the clip applier mechanism 91 is switched from the initial state A to the clip feed completion state B, an external force is applied to the spindle connector 2 so as to move along the +Z direction. In the process of moving the spindle connector 2, the first guide 412a enters the first guide groove 411a from the first slot 411a1, and the first wall W1 guides the first guide 412a to the first position S1 shown in FIG. 6 so as to switch the spindle connector 2 from the initial state A to the clip feed completion state B.

[0228] 7A, 7B and 12, when the clip applier mechanism 91 is switched from the clip feeding completion state B to the adjustment state C, an external force is applied to the spindle connector 2 to keep moving along the +Z direction. The first wall W1 guides the first guide member 412a from the first position S1 to the second position S2 to switch the spindle connector 2 from the clip feeding completion state B to the adjustment state C.

[0229] For example, the extension direction of the second wall W2 is different from the extension direction of the first wall W1, and the second position S2 is located at the connection point between the first wall W1 and the second wall W2, and in this manner, the first guide 412a can be restricted to the second position S2 by the second wall W2.

[0230] As shown in FIG. 8A, FIG. 8B and FIG. 12, when the clip applier mechanism 91 is switched from the adjustment state C to the firing state D, an external force is applied to the spindle connector 2 so that the spindle connector 2 continues to move along the +Z direction. The second wall W2 guides the first guide 412a from the second position S2 to the third position S3. The extension direction of the third wall W3 is different from the extension direction of the second wall W2, and the movement direction of the first guide 412a in the first guide groove 411a is changed, which causes the spindle connector 2 to rotate by an angle a1 along the first rotation direction +R while moving along the +Z direction. Finally, the spindle connector 2 is switched from the adjustment state C to the firing state D.

[0231] For example, the extension direction of the third wall W3 is different from the extension direction of the second wall W2, and the third position S3 is located between the second wall W2 and the third wall W3, and in this manner, the first guide 412a can be restricted to the third position S3 by the third wall W3.

[0232] For example, in Fig. 12, there is a certain gap between the second wall W2 and the third wall W3. It should be understood that in other embodiments, the second wall W2 and the third wall W3 may be connected to each other to better define the third position.

[0233] 9A, 9B and 12, when the clip applier mechanism 91 is switched from the firing state D to the retracted state E, an external force is applied to the main shaft connector 2 to move along the -Z direction. The third wall W3 guides the first guide member 412a from the third position S3 to the fourth position S4 to switch the main shaft connector 2 from the firing state D to the retracted state E.

[0234] For example, the extension direction of the fourth wall W4 is different from the extension direction of the third wall W3, and the fourth position S4 is located at the connection point between the third wall W3 and the fourth wall W4, and in this manner, the first guide 412a can be restricted to the fourth position S4 by the fourth wall W4.

[0235] As shown in FIG. 10A, FIG. 10B and FIG. 12, when the clip applier mechanism 91 is switched from the retreated state E to the rotation return state F, the spindle connector 2 moves along the -Z direction under the action of the return force of the first spring 13a, and the fourth wall W4 guides the first guide 412a from the fourth position S4 to the fifth position S5. The extension direction of the fifth wall W5 is different from the extension direction of the fourth wall W4, and the movement direction of the first guide 412a in the first guide groove 411a is changed, and thus the spindle connector 2 is rotated back by an angle a1 along the second rotation direction -R while moving along the -Z direction. For example, the angle a2 is smaller than the angle a1. Finally, the spindle connector 2 is switched from the retreated state E to the rotation return state F.

[0236] 3A and 12, when the clip applier mechanism 91 is switched from the rotation return state F to the initial state A, the spindle connector 2 continues to move along the -Z direction under the action of the restoring force of the second spring 13b, and at this time, the fifth wall W5 guides the first guide 412a from the fifth position P5 to the outside of the first guide groove 411a, and causes the first guide 412a to move away from the first guide groove 411a from the second slot 411a2. As the first guide 412a moves away from the first guide groove 411a, the spindle connector 2 continues to rotate by an angle a3 along the second rotation direction -R, and finally returns from the rotation return state F to the initial state A.

[0237] In the embodiment of the present invention, the fifth wall W5 can move the first guide 412a a certain distance in the Z direction, and can effectively prevent the first locking member and the second locking member from locking each other during the return process of the clip applier mechanism. It should be understood that in other embodiments, the first guide groove 411a does not need to include the fifth wall W5, i.e., the second slot 411a2 is located at the fifth position S5, in which case the fourth wall W4 can directly guide the first guide 412a from the fourth position P4 to the outside of the first guide groove 411a, thereby also achieving the object of the present invention.

[0238] As shown in FIG. 12, for example, the extension directions of the first wall W1, the third wall W3 and the fifth wall W5 are each substantially parallel to the Z direction, which is advantageous for guiding the movement of the spindle connector 2 in the Z direction.

[0239] In the embodiments of the present invention, the term "approximately parallel" means approximately parallel or substantially parallel, and allows for process and measurement errors. In the embodiments of the present invention, the term "about" does not require a strict numerical limit, and may be understood as a numerical value within the range of allowable process and measurement errors.

[0240] As shown in FIG. 12, for example, the extension directions of the second wall W2 and the fourth wall W4 are inclined with respect to the Z direction, which is advantageous for guiding the movement of the spindle connector 2 in the Z direction and the rotation in the R direction.

[0241] 12, for example, there is a first inclination angle b1 between the second wall W2 and the Z direction, and there is a second inclination angle b2 between the fourth wall W4 and the Z direction, and the first inclination angle b1 is greater than the second inclination angle b2. By making the first inclination angle b1 greater than the second inclination angle b2, it is possible to prevent the spindle connector 2 from being locked by the locking mechanism during the return process.

[0242] In the embodiment of the present invention, the values ​​of the first inclination angle b1 and the second inclination angle b2 are related to the friction coefficients between the first guide 412a and the second wall W2 and the fourth wall W4, and can be determined by those skilled in the art according to actual needs.

[0243] For example, the first inclination angle b1 is 10° to 70°, and the second inclination angle b2 is 10° to 70°. If the first inclination angle b1 and the second inclination angle b2 are less than 10°, the first guides 412a and 412b can easily guide the spindle connector 2, but the overall length of the spindle connector 2 will be long, and the entire device will also be long. If the first inclination angle b1 and the second inclination angle b2 are 70° or more, the first guides 412a and 412b may get caught and self-lock, making it impossible to guide the spindle connector 2.

[0244] In this embodiment, in order to make the sliding of the first guide 412a in the first guide groove 411a smoother, the second wall W2 and the fourth wall W4 may be provided as spiral surfaces that spirally rise along the tubular member 20 of the spindle connector 2, and the above-mentioned first inclination angle b1 is the approach angle of the second wall W2, and the above-mentioned second inclination angle b2 is the approach angle of the fourth wall W4.

[0245] In the embodiment of the present invention, the material of the clip may be various, and the size of the clip may be designed to be different according to the specific material. The length of the first guide groove 411a, 411b is determined according to the material and size of the clip. For example, the clip can be made of absorbent material or non-absorbent material including but not limited to plastic or metal. If the clip is a plastic clip, the length of the plastic clip is long, and therefore the firing distance of the plastic clip is long (about 10mm), so the length of the first guide groove 411a, 411b should be set long. If the clip is a metal clip (such as a titanium clip), the length of the titanium clip is short, and therefore the firing distance of the titanium clip is short (about 6mm), so the length of the first guide groove 411a, 411b should be set short.

[0246] 12, for example, the first guide mechanism 41a further includes a partition wall W0 provided in the first guide groove 411a, and the partition wall W0 extends along the Z direction to define the first slot 411a1 and the second slot 411a2. By providing the partition wall W0 in the first guide groove 411a, it is more advantageous to form the first slot 411a1 and the second slot 411a2.

[0247] The embodiment of the present invention will be described using two first guide mechanisms 41a, 41b as an example, however, it should be understood that the number of first guide mechanisms may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0248] When the number of the first guide mechanisms is multiple, the multiple first guide mechanisms are provided between the spindle connector 2 and the housing 6 at equal intervals along the circumferential direction of the spindle connector 2, thus making the force received by the spindle connector 2 or the housing 6 uniform and enhancing the effect of locking in a predetermined position.

[0249] For example, the spindle connector 2 is a tubular member 20, and the two first guide mechanisms 41a, 41b are arranged symmetrically in the radial direction of the tubular member 20. In this way, the number of the first guide mechanisms can be minimized while ensuring that the force received by the spindle connector 2 or the housing 6 is uniform, thereby saving manufacturing costs and reducing processing difficulty.

[0250] As shown in Figures 4A, 4C and 5, the clip applier mechanism 91 further includes second guide mechanisms 42a, 42b provided between the spindle connector 2 and the housing 6, and the second guide mechanisms 42a, 42b are different from the first guide mechanisms 41a, 41b.

[0251] In this embodiment of the present invention, the second guide mechanisms 42a, 42b differ in construction and position from the first guide mechanisms 41a, 41b.

[0252] For example, the second guide mechanism 42a includes a second guide 422a provided in the housing 6 and a second guide groove 421a provided in the spindle connector 2, and the second guide mechanism 42b includes a second guide 422b provided in the housing 6 and a second guide groove 421b provided in the spindle connector 2.

[0253] For example, the second guide grooves 421a, 421b are positioned differently from the first guide grooves 411a, 411b in the spindle connector 2. In the housing 6, the second guides 422a, 422b are also positioned differently from the first guides 412a, 412b.

[0254] In the embodiment of the present invention, the configurations of the two second guide mechanisms 42a, 42b may be the same or different. If they are the same, the manufacturing process is simplified, which is preferable. The embodiment of the present invention will be described taking the case where the two are the same as an example.

[0255] 4A, the opening direction of the slot of the first guide groove 411a is the +Z direction, but the opening direction of the slot of the second guide groove 421a is the -Z direction, so that the opening direction of the slot of the second guide groove 421a is opposite to the opening direction of the slot of the first guide groove 411a. By providing the second guide mechanism and reversing the opening directions of the first guide groove 411a and the second guide groove 421a, it is advantageous to guide the spindle connector 2 from the rotation return state F to return to the initial state A.

[0256] For example, in the process in which the spindle connector 2 returns from the rotation return state F to the initial state A, the first guide 412a moves away from the first guide groove 411a. Without the second guide mechanism, the spindle connector 2 would not be controlled when attempting to rotate by the angle a3, and as a result, the actual rotation angle may be greater than a3.

[0257] In the embodiment of the present invention, by providing a second guide mechanism, the second guide 422a is inserted into the second guide groove 421a in the process of the spindle connector 2 returning from the rotation return state F to the initial state A. Since the second guide groove 421a can determine the moving direction of the second guide 422a, the spindle connector 2 continues to rotate by an angle α3 along the second rotation direction -R while being guided to move toward the -Z direction, and finally the spindle connector 2 is returned from the rotation return state F to the initial state A.

[0258] Although the embodiment of the present invention will be described using two first guide mechanisms 42a, 42b as an example, it should be understood that the number of first guide mechanisms may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0259] When the number of the first guide mechanisms is multiple, the multiple first guide mechanisms are provided between the spindle connector 2 and the housing 6 at equal intervals along the circumferential direction of the spindle connector 2, thereby making the force received by the spindle connector 2 or the housing 6 uniform and enhancing the guiding effect.

[0260] For example, the spindle connector 2 is a tubular member 20, and the two first guide mechanisms 42a, 42b are arranged symmetrically in the radial direction of the tubular member 20. In this way, the number of the first guide mechanisms can be minimized while ensuring that the force received by the spindle connector 2 or the housing 6 is uniform, thereby saving manufacturing costs and reducing processing difficulty.

[0261] In the clip applier device, the main shaft connector moves to different positions under the action of external force, and in the process of moving, the main shaft connector can be guided in its moving direction by a guide mechanism. After a period of use, the guide groove or guide may be worn out, which may affect the switching between different positions of the main shaft connector.

[0262] Therefore, yet another embodiment of the present invention aims to provide a clip applier mechanism of a clip applier device, which can be quickly switched between different positions with the assistance of at least a main shaft connector, thereby further ensuring the operational stability and safety of the clip applier mechanism.

[0263] For example, a clip applier mechanism of a clip applier device according to yet another embodiment of the present invention includes a tube, a shaft, a clip bin assembly, a clip pusher assembly, and a firing assembly, the tube having opposing head and distal ends, the shaft disposed proximate the distal end and at least partially disposed within the tube, the clip bin assembly extending through the tube and including a clip bin disposed within the tube and configured to hold a clip, and an end effector extending from the head end, the clip pusher assembly disposed at least partially within the tube and configured to be pushed by the shaft toward the head end to transport a clip in the clip bin into the end effector, and the firing assembly disposed at least partially within the tube and configured to be pushed by the shaft toward the head end to close the end effector and fire the clip in the end effector. Additionally, the clip applier mechanism further includes a shaft connector, a housing, and a position limiting mechanism. A main shaft connector is fitted onto the main shaft and connected to the main shaft, a housing is configured to accommodate the main shaft and the main shaft connector, the main shaft connector is configured to move relative to the housing in the axial direction of the tube and in the circumferential direction of the tube, and a position limiting mechanism is provided between the main shaft connector and the housing and configured to limit a range of movement of the main shaft connector relative to the housing.

[0264] In the clip applier mechanism according to the above embodiment of the present invention, a position limiting mechanism is provided between the main shaft connector and the housing, which can limit the position of the movement range of the main shaft connector within the housing, assisting the main shaft connector in switching between different positions, and thus further ensuring the operational stability and safety of the clip applier mechanism.

[0265] Next, the above-mentioned clip applier mechanism and clip applier device will be described with reference to Figures 1A to 12. In order to maintain the clarity and conciseness of the present invention, the same parts as those in the above-mentioned embodiment will not be described in detail, and the related configurations and arrangements may refer to the description of the above-mentioned embodiment.

[0266] As shown in FIGS. 1A, 1B and 2, a clip applier device 900 according to yet another embodiment of the present invention includes a clip applier mechanism 91 and a handle assembly 92.

[0267] For example, clip applier mechanism 91 is removably connected to handle assembly 92. Clip applier mechanism 91 includes tube 90, shaft 1, shaft connector 2, percussion connector 3, clip bin assembly, clip pusher assembly, percussion assembly, housing 6, push rod 7, and end cap 12. The percussion assembly includes, for example, percussion rod body 4 and percussion sleeve 5. The clip bin assembly includes, for example, clip bin 9 and clamp forceps 11 (also referred to as end effector). The clip pusher assembly includes, for example, push block 8 and clip pusher plate 10.

[0268] For example, the tube 90 includes opposing head end 90A and distal end 90B. The shaft 1 is disposed adjacent to the distal end 90B and at least partially disposed within the tube 90. The clip bin assembly extends through the tube 90 and includes a clip bin disposed within the tube 90 and configured to hold clips therein, and a clamp forceps 11 protruding from the head end 90A. The clip pushing assembly is disposed at least partially within the tube 90 and configured to be pushed toward the head end 90A by the shaft 1 to transport a clip in the clip bin into the clamp forceps 11. The firing assembly is disposed at least partially within the tube 90 and configured to be pushed toward the head end 90A by the shaft 1 to close the clamp forceps 11 and fire a clip in the clamp forceps 11.

[0269] For example, the spindle connector 2 is fitted onto the spindle 1 and connected to the spindle 1. The housing 6 is configured to accommodate at least a portion of the spindle 1 and the spindle connector 2, and the spindle connector 2 is configured to be movable relative to the housing 6 in the axial direction of the tube 90 (e.g., the Z direction shown in the figure) and in the circumferential direction of the tube 90 (e.g., the R direction shown in the figure).

[0270] For example, the clip applier mechanism 91 further includes position limiting mechanisms 51a, 51b provided between the spindle connector 2 and the housing 6, and the position limiting mechanisms 51a, 51b are configured to limit the range of movement of the spindle connector 2 relative to the housing 6.

[0271] 5 and 12, the position limiting mechanism 51a includes a position limiting protrusion 511a provided on the spindle connector 2 and a position limiting groove 512a provided on the housing 6. The position limiting mechanism 51b (not shown) includes a position limiting protrusion 511b provided on the spindle connector 2 and a position limiting groove 512b (not shown) provided on the housing 6. The position limiting protrusion 511a is movable within the position limiting groove 512a, and the position limiting protrusion 511b is movable within the position limiting groove 512b.

[0272] For example, the position limiting grooves 512a and 512b are both provided in the second housing part 62 of the housing 6. When the clip applier mechanism 91 performs each operation, the second housing part 62 remains fixed, and the main shaft connector 2 moves or rotates relative to the second housing part 62. By providing the position limiting grooves 512a and 512b in the second housing part 62 and providing the position limiting protrusions 511a and 511b in the main shaft connector 2, the position of the movement range of the main shaft connector 2 in the housing 6 can be limited by the fitting relationship between the position limiting protrusions 511a and 511b and the position limiting grooves 512a and 512b, thereby assisting the switching between different positions of the main shaft connector, and thus further ensuring the stability and safety of the clip applier mechanism 91 in operation.

[0273] In the embodiment of the present invention, the configurations of the two position limiting mechanisms 51a, 51b may be the same or different. If they are the same, it is preferable because the manufacturing process is simplified. The embodiment of the present invention will be described using an example in which the two are the same. Below, the position limiting mechanism 51a will be described as an example.

[0274] 5, for example, in the position limiting mechanism 51a, the position limiting groove 512a includes a first position limiting sub-groove 512a1 and a second position limiting sub-groove 512a2. The second position limiting sub-groove 512a2 is connected to the first position limiting sub-groove 512a1 and is located more cranially than the first position limiting sub-groove 512a1. The first position limiting sub-groove 512a1 is configured to limit the movement of the position limiting protrusion 511a in the Z direction, and the second position limiting sub-groove 512a2 is configured to limit the movement of the position limiting protrusion 511a in the Z direction and / or the circumferential direction.

[0275] 5, for example, the extension direction of the first position limiting sub-groove 512a1 is parallel to the Z direction, i.e., the length direction of the first position limiting sub-groove 512a1 is parallel to the Z direction, and the extension direction of the second position limiting sub-groove 512a2 is parallel to the Z direction, i.e., the length direction of the second position limiting sub-groove 512a2 is parallel to the Z direction. For example, the first position limiting sub-groove 512a1 has a first width a1w in the R direction, and the second position limiting sub-groove 512a2 has a second width a2w in the R direction. The second width a2w is larger than the first width a1w so that the position limiting protrusion 511a can move simultaneously along the Z direction and the R direction in the second position limiting sub-groove 512a2.

[0276] As shown in Figures 3A, 5 and 6, when the spindle connector 2 is switched from the initial state A to the clip feed completion state B, the position limiting protrusion 511a moves along the +Z direction within the first position limiting sub-groove 512a1, and at this time, the position limiting protrusion 511a only moves along the +Z direction but does not rotate in the R direction.

[0277] For example, the width of the position limiting protrusion 511a in the R direction is approximately equal to the first width a1w of the first position limiting sub-groove 512a1, and in this way, it is possible to prevent the position limiting protrusion 511a from slipping out of the first position limiting sub-groove 512a1.

[0278] As shown in Figures 5 and 7A, when the spindle connector 2 is switched from the clip feed completion state B to the adjustment state C, the position limiting protrusion 511a continues to move along the +Z direction and enters from the first position limiting sub-groove 512a1 into the second position limiting sub-groove 512a2.

[0279] 5 and 8A, when the spindle connector 2 is switched from the adjustment state C to the firing completion state D, the position limiting protrusion 511a moves in the second position limiting sub-groove 512a2 along the +Z direction and simultaneously rotates in the first rotation direction +R by an angle a1. During this process, since the second width a2w of the second position limiting sub-groove 512a2 is greater than the first width a1w of the first position limiting sub-groove 512a1, the position limiting protrusion 511a can move in the +Z direction and rotate in the +R direction at the same time.

[0280] As shown in FIGS. 5 and 9A, when the spindle connector 2 is switched from the firing state D to the retracted state E, the position limiting protrusion 511a moves along the −Z direction within the second position limiting sub-groove 512a2.

[0281] As shown in Figures 5 and 10A, when the spindle connector 2 is switched from the retracted state E to the rotation return state F, the position limiting protrusion 511a continues to move along the -Z direction and at the same time rotates by an angle a2 along the second rotation direction -R to disengage from the second position limiting sub-groove 512a2.

[0282] 3A and 5, when the spindle connector 2 returns from the rotation return state F to the initial state A, the position limiting protrusion 511a continues to move along the -Z direction and simultaneously continues to rotate by the angle a3 along the second rotation direction -R to return to the first position limiting sub-groove 512a1. At this time, the position limiting protrusion 511a returns to the initial position.

[0283] As shown in FIG. 5, the second position limiting sub-groove 512a2 includes a first side wall 5121 and a second side wall 5122 opposed to each other in the Z direction, the first side wall 5121 being close to the head end 90A, and the second side wall 5122 being far from the head end 90A. At least one of the first side wall 5121 and the second side wall 5122 is provided so as to be inclined with respect to the bottom surface of the second position limiting sub-groove 512a2. For example, in FIG. 5, the second side wall 5122 is provided so as to be inclined with respect to the bottom surface of the second position limiting sub-groove 512a2 so as to form an inclined surface, and thus, when the position limiting protrusion 511a is released from the second position limiting sub-groove 512a2, it is possible to avoid the position limiting protrusion 511a being caught by the second side wall 5122 and being stuck there.

[0284] 12, for example, the spindle connector 2 further includes elastic members 513a, 513b that are provided on the side of the spindle connector 2 facing the housing 6 and are configured to be elastically deformable in the radial direction of the spindle connector 2, and the position limiting protrusions 511a, 511b are provided on the elastic members 513a, 513b, respectively. By providing the elastic members 513a, 513b on the spindle connector 2, the position limiting protrusions 511a, 511b can have a certain displacement space in the radial direction of the spindle connector 2, which is advantageous for maintaining tight engagement between the position limiting protrusions 511a, 511b and the position limiting grooves 512a, 512b.

[0285] For example, when the first position limiting sub-groove 512a1 and the second position limiting sub-groove 512a2 have different depths, the position limiting protrusion 511a can remain in sufficient contact with the first position limiting sub-groove 512a1 and the second position limiting sub-groove 512a2, respectively, via the elastic member 513a, thereby achieving a tight engagement.

[0286] As shown in Fig. 12, the main shaft connector 2 is a tubular member 20, and the elastic member 513b protrudes from the side of the tubular member 20 facing the housing 6 and includes a hollow portion 514b. By providing the hollow portion 514b in the elastic member 513b, the elastic space of the elastic member 513b can be further increased. Although Fig. 12 shows only the hollow portion 514b of the elastic member 513b, it should be understood that the elastic member 513a also has a similar hollow portion.

[0287] Although the embodiment of the present invention will be described using two position limiting mechanisms 51a, 51b as an example, it should be understood that the number of position limiting mechanisms may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0288] When there are multiple position limiting mechanisms, the multiple position limiting mechanisms are provided at equal intervals along the circumferential direction of the spindle connector 2 between the spindle connector 2 and the housing 6, thereby making the force received by the spindle connector 2 or the housing 6 uniform and enhancing the effect of position limiting.

[0289] For example, the spindle connector 2 is a tubular member 20, and the two position limiting mechanisms 51a, 51b are arranged symmetrically in the radial direction of the tubular member 20. In this way, the number of position limiting mechanisms can be minimized while ensuring that the force received by the spindle connector 2 or the housing 6 is uniform, thereby saving manufacturing costs and reducing processing difficulty.

[0290] 1A and 3 to 3C, the push rod 7 is located within the handle assembly 92 and is detachably connected to the spindle connector 2, and is configured to drive the spindle 1 and the spindle connector 2 to move in the Z direction, e.g., in the +Z direction or the -Z direction. The detachable connection between the push rod 7 and the spindle connector 2 allows the clip applier mechanism 91 to be quickly removed from the handle assembly 92, which is advantageous for replacing the clip applier mechanism 91 with a clip of a different size.

[0291] 3C and 7C, for example, the grip applier mechanism 91 further includes engagement mechanisms 52a, 52b provided between the spindle connector 2 and the pressing rod 7. The engagement mechanism 52a includes an engagement pin 521a provided on the spindle connector 2 and an engagement groove 522a provided on the pressing rod 7, and the engagement pin 521a is configured to be mutually engaged with the engagement groove 522a so as to realize a connection between the pressing rod 7 and the spindle connector 2.

[0292] In the embodiment of the present invention, the configurations of the two engagement mechanisms 52a, 52b may be the same or different. If the two are the same, the manufacturing process is simplified, which is preferable. The embodiment of the present invention will be described using an example in which the two are the same. Below, the engagement mechanism 52a will be described as an example.

[0293] For example, the engagement mechanism 52a has a separated state, a released state, and a locked state. In the separated state, the engagement pin 521a and the engagement groove 522a are separated from each other, and the engagement pin 521a is located outside the engagement groove 522a. In the released state, the engagement pin 521a is located within the engagement groove 522a and can be removed from the engagement groove 522a. In the locked state, the engagement pin 521 is locked to the engagement groove 522a.

[0294] Fig. 13 is a schematic diagram of an engagement mechanism according to an embodiment of the present invention. As shown in Fig. 13, for example, the engagement groove 522a includes a release position 522p1 and a lock position 522p2, and the engagement pin 521a is movable between the release position 522p1 and the lock position 522p2.

[0295] For example, when the engagement mechanism is in a locked state, the engagement pin 521a is located at a locked position 522p2. When the engagement mechanism is in a released state, the engagement pin 521a is located at a released position 522p1 and can be disengaged from the engagement groove 522a. When the engagement mechanism is in a disengaged state, the engagement pin 521a is located outside the engagement groove 522a and is therefore not located at the released position 522p1 or the locked position 522p2.

[0296] As shown in Figures 3 to 3C, when the clip applier mechanism 91 is in the initial state A, the engagement mechanism 52a is in the disengaged state. As shown in Figures 6, 7C and 10C, when the clip applier mechanism 91 is in the clip advance state B, the adjustment state C or the rotation back state F, the engagement mechanism 52a is in the released state. As shown in Figures 8C and 9C, when the clip applier mechanism 91 is in the firing state D or the retracted state E, the engagement mechanism 52a is in the locked state.

[0297] After the clip is fired (i.e., in the fired state D and the retracted state E), the engagement mechanism 52a is in a locked state, and the pressing rod 7 and the spindle connector 2 are locked to each other. Then, by applying an external force to the spindle connector 2, the spindle connector 2 is moved in the -Z direction, and the pressing rod 7 is retracted in the -Z direction along with the spindle connector 2. By setting the engagement mechanism 52a to be in a locked state in the fired state D and the retracted state E, it is ensured that the pressing rod 7 and the spindle connector 2 do not separate from each other at least during the firing process and the retracted process, and the occurrence of unexpected events is avoided during the above two processes.

[0298] Although the embodiment of the present invention will be described using two engagement mechanisms 52a, 52b as an example, it should be understood that the number of engagement mechanisms may be one or more, for example, three, and the embodiment of the present invention is not limited thereto.

[0299] When the number of engagement mechanisms 52a is multiple, the multiple engagement mechanisms are provided at equal intervals along the circumferential direction of the spindle connector 2 between the spindle connector 2 and the pressing rod 7, thereby making the force received by the spindle connector 2 or the pressing rod 7 uniform and enhancing the effect of engagement.

[0300] For example, the spindle connector 2 is a tubular member 20, and the two engaging mechanisms 52a, 52b are arranged symmetrically in the radial direction of the tubular member 20. In this way, the force received by the spindle connector 2 or the pressing rod 7 can be ensured to be uniform, while the number of engaging mechanisms can be minimized, thereby saving manufacturing costs and reducing processing difficulty.

[0301] 3D, the tubular member 20 includes a first tubular portion 20A and a second tubular portion 20B in the Z direction. The first tubular portion 20A and the second tubular portion 20B have different inner diameters to accommodate different components.

[0302] For example, the first tubular portion 20A and the second tubular portion 20B are connected to each other, the first tubular portion 20A is close to the head end 90A, and the second tubular portion 20B is far from the head end 90A, and the inner diameter of the first tubular portion 20A is larger than the inner diameter of the second tubular portion 20B, so that the first tubular portion 20A can accommodate the main shaft 1, the percussion connector 3, and the percussion rod body 4, and the second tubular portion 20B can accommodate the main shaft 1 and the push rod 7. By providing the first tubular portion 20A and the second tubular portion 20B with different inner diameters, the position and relative movement of other components can be prevented from being affected when connecting the main shaft connector 2 to the push rod 7.

[0303] In the clip applier mechanism and clip applier device according to the above-described embodiments of the present invention, at least the following beneficial effects can be achieved.

[0304] 1) By providing a spindle connector connected to the spindle and providing a locking mechanism between the spindle connector and the housing, it is possible to ensure that the spindle connector and the housing are locked by the locking mechanism when a clip is transported into the end effector, thereby avoiding damage to the end effector during secondary use of the clip applier mechanism.

[0305] 2) By providing a main shaft connector connected to the main shaft and a percussion connector connected to the main shaft connector and the percussion assembly respectively, after the clip is fired, the main shaft connector, the engagement mechanism and the percussion connector are used to pull the percussion assembly back in a direction away from the head end, which is favorable for the return of the firing sleeve and avoids affecting subsequent operations.

[0306] 3) By providing a first guide mechanism between the spindle connector and the housing, the spindle connector is guided by the first guide mechanism during the moving or rotating process, and the spindle connector is also connected to the spindle, so that it can ensure that both the spindle and the spindle connector are quickly and accurately positioned when the clip applier mechanism performs each operation.

[0307] 4) By providing a position limiting mechanism between the spindle connector and the housing, the position of the movement range of the spindle connector within the housing can be limited, which assists in switching between different positions of the spindle connector, and thus further ensures the operational stability and safety of the clip applier mechanism.

[0308] In this specification, the following points should be noted.

[0309] (1) The drawings of the embodiments of the present invention relate only to the configuration of the embodiments of the present invention, and reference may be made to the general design for other configurations.

[0310] (2) As long as there is no contradiction, the embodiments of the present invention and the features of the embodiments can be combined with each other to obtain new embodiments.

[0311] (3) The above are merely exemplary embodiments of the present invention, and do not limit the scope of the present invention, the protection scope of the present invention being determined by the appended claims.

[0312] The above is merely a specific embodiment of the present invention, and the scope of the present invention is not limited thereto, and any modifications or replacements that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be in accordance with the scope of protection of the claims.

Claims

1. a tubular body including opposed head and distal ends; a main shaft disposed adjacent the distal end and at least a portion of the main shaft disposed within the tube; a clip bin assembly extending through the tube and including a clip bin disposed within the tube and configured to receive a clip and an end effector extending from the head end; a clip pushing assembly at least partially disposed within the tube, the clip pushing assembly being configured to be pushed by the spindle toward the head end to transport clips in the clip bin into the end effector; A clip applier mechanism of a clip applier apparatus, comprising: The clip applier mechanism comprises: a main shaft connector that is fitted onto the main shaft and connected to the main shaft, the main shaft connector being configured to move in the same direction as the main shaft in the axial direction of the tube; a housing configured to receive the spindle and the spindle connector; a lock mechanism provided between the spindle connector and the housing; Further comprising: the locking mechanism, the spindle connector, and the housing are configured such that, when the clip is transported into the end effector, the spindle connector and the housing are locked to each other by the locking mechanism; The locking mechanism includes: a first locking member provided on the main shaft connector; a second locking member provided on the housing; Including, the clip applier mechanism has an initial state and a clip feed complete state, in which no external force is applied to either the spindle or the spindle connector in the initial state, and in which the clip has already been delivered into the end effector in the clip feed complete state; the locking mechanism is configured to be changed from an initial position to a locked position when the clip applier mechanism is switched from the initial state to the clip feeding completion state, and in the initial position, the first locking member and the second locking member are spaced apart from each other in an axial direction of the tubular body, and the first locking member is farther from the head end than the second locking member, and in the locked position, the first locking member and the second locking member are locked to each other; the clip applier mechanism further includes a firing assembly located at least partially within the tube and configured to be pushed by the shaft toward the head end to close the end effector and fire the clip within the end effector; the clip applier mechanism further has a fired state, a retracted state, and a rotated back state, in which in the fired state, the clip in the end effector is fired, in the retracted state, the firing assembly moves away from the head end, and in the rotated back state, the firing assembly is returned; When the clip applier mechanism is in the fired state, the retracted state, or the rotated back state, the locking mechanism is configured to be in three different unlocked positions, and the first locking member and the second locking member are configured to be unlocked from each other. A clip applier mechanism of a clip applier device.

2. The spindle and the spindle connector press the clip pressing assembly to transport the clip into the end effector, and when the clip is transported into the end effector, the first locking member and the second locking member are locked to each other. The clip applier mechanism of the clip applier apparatus of claim 1 .

3. the main shaft includes opposed first and second ends, the first end being proximate the head end and the second end being distal to the head end in an axial direction of the tube; the main shaft connector is a tubular member, at least a portion of which is fitted onto the second end of the main shaft, the tubular member including a wall having a first end face and a second end face opposed to each other in an extension direction of the tubular member, the first end face being adjacent to the head end and the second end face being remote from the head end; the first locking member includes a projection extending from a first end surface of the tube wall toward the head end; A clip applier mechanism of the clip applier apparatus of claim 2.

4. The tubular member includes: a through groove provided in the tube wall, the extending direction of the through groove being parallel to an axial direction of the tubular member, the through groove including a slot opened in the first end face, the slot being adjacent to the protrusion; A clip applier mechanism of the clip applier apparatus of claim 3.

5. the tubular member includes at least two of the through grooves, and at least two slots of the at least two through grooves are provided on opposite sides of the protrusion along a circumferential direction of the tubular member, A clip applier mechanism of the clip applier apparatus of claim 4.

6. the first locking member further includes a first hook provided on the protrusion, the housing includes an inner wall facing the main shaft connector, the second locking member includes a second hook provided on the inner wall, The first hook and the second hook are configured to be engaged with each other. A clip applier mechanism of the clip applier apparatus of claim 3.

7. the spindle connector is located between the spindle and the housing in a radial direction of the spindle, When the spindle connector and the housing are locked to each other by the locking mechanism, the spindle and the spindle connector move simultaneously in the same direction as the axial direction, but the spindle and the spindle connector are configured to be capable of relative movement in a circumferential direction of the spindle. The clip applier mechanism of the clip applier apparatus of claim 1 .

8. The clip applier mechanism includes: The present invention further includes an axial engagement mechanism provided between the spindle and the spindle connector, and the spindle and the spindle connector are connected to each other in the axial direction of the spindle by the axial engagement mechanism, but are configured so that the two can move relatively in the circumferential direction of the spindle. A clip applier mechanism of the clip applier apparatus of claim 7.

9. The axial engagement mechanism includes: An engagement groove provided in the main shaft; an engagement pin provided in the spindle connector and configured to move within the engagement groove along a circumferential direction of the spindle; A clip applier mechanism of the clip applier apparatus of claim 8.

10. the clip applier mechanism further has an adjustment state, in which the clip is already loaded into the end effector and an opening and closing angle of the end effector is adjustable; the locking mechanism is configured to be in four different unlocked positions such that the first locking member and the second locking member are unlocked from each other when the clip applier mechanism is in the adjusted state, the fired state, the retracted state, and the rotated back state, respectively. The clip applier mechanism of the clip applier apparatus of claim 1 .

11. the locking mechanism is configured to be changed from the locked position to a first unlocked position when the clip applier mechanism is switched from the clip feeding completion state to the adjustment state, and in the first unlocked position, the first locking member and the second locking member are spaced apart from each other by a first distance in an axial direction of the tubular body. A clip applier mechanism of the clip applier apparatus of claim 10.

12. the locking mechanism is configured to change from the first unlocked position to a second unlocked position when the clip applier mechanism is switched from the adjusted state to the fired state, and in the second unlocked position, the first locking member and the second locking member are spaced apart a second distance in an axial direction of the tube and a first circumferential distance in a circumferential direction of the tube, the second distance being greater than the first distance and the first circumferential distance being greater than zero; A clip applier mechanism of the clip applier apparatus of claim 11.

13. the locking mechanism is configured to be changed from the second unlocked position to a third unlocked position when the clip applier mechanism is switched from the fired state to the retracted state, and in the third unlocked position, the first locking member and the second locking member are spaced apart a third distance in the axial direction of the tube and remain spaced apart a first circumferential distance in the circumferential direction of the tube, the third distance being smaller than the second distance and greater than zero; A clip applier mechanism of the clip applier apparatus of claim 12.

14. the locking mechanism is configured to be changed from the third unlocked position to a fourth unlocked position when the clip applier mechanism is switched from the retracted state to the rotated back state, and in the fourth unlocked position, the first locking member and the second locking member are separated from each other by a second circumferential distance in a circumferential direction of the tube, the second circumferential distance being smaller than the first circumferential distance and larger than zero; A clip applier mechanism of the clip applier apparatus of claim 13.

15. the spindle connector has an initial state and a clip feed completion state; When the main shaft connector is switched from the initial state to the clip feed completion state, the main shaft connector is configured to move toward the head end together with the first locking member so as to cause the locking mechanism to reach the locking position. The clip applier mechanism of the clip applier apparatus of claim 1 .

16. The main shaft connector further has a firing state, a retracted state, and a rotation return state; The spindle connector is configured to move with the first locking member when switched between the fired state, the retracted state, and the rotated back state, such that the locking mechanism is in three different unlocked positions, respectively. A clip applier mechanism of the clip applier apparatus of claim 15.

17. The spindle connector further has an adjustment state; the spindle connector is configured to move with the first locking member when switched between the adjustment state, the firing state, the retracted state, and the rotation back state such that the locking mechanism is in four different unlocked positions, respectively.

17. A clip applier mechanism of the clip applier apparatus of claim 16.

18. When the main shaft connector is switched from the clip feed completion state to the adjustment state, it is configured to continue to move toward the head end, taking the first locking member with it, so as to increase the axial distance between the first locking member and the second locking member to a first distance.

20. A clip applier mechanism of the clip applier apparatus of claim 17.

19. When the main shaft connector is switched from the adjustment state to the firing completion state, it is configured to continue to move toward the head end together with the first locking member so as to increase the first distance to a second distance, and at the same time, to further rotate together with the first locking member along a first rotational direction so as to increase the circumferential distance between the first locking member and the second locking member in the circumferential direction of the tube body to a first circumferential distance, the circumferential direction of the tube body including the first rotational direction and a second rotational direction opposite to the first rotational direction; 20. A clip applier mechanism of the clip applier apparatus of claim 18.

20. The main shaft connector is configured to move away from the head end, taking along the first locking member, so as to reduce the second distance to a third distance when the main shaft connector is switched from the firing state to the retracted state.

20. A clip applier mechanism of the clip applier apparatus of claim 19.

21. When the main shaft connector is switched from the retracted state to the rotation return state, it is configured to continue to move away from the head end, taking the first locking member with it, so as to reduce the axial distance of the tube between the first locking member and the second locking member from the third distance to a fourth distance, and at the same time, to further rotate along the second rotational direction, taking the first locking member with it, so as to reduce the first circumferential distance to a second circumferential distance; 21. A clip applier mechanism of the clip applier apparatus of claim 20.

22. The spindle connector is configured, when switched from the rotation return state to the initial state, to continue to move away from the head end, taking the first locking member with it, so as to move the first locking member to a side of the second locking member far away from the head end, and at the same time, to continue to rotate along the second rotation direction, taking the first locking member with it, so as to make the second circumferential distance zero.

22. A clip applier mechanism of the clip applier apparatus of claim 21.

23. 13. A clip applier mechanism comprising: Clip applier device.

Images