Clip applier

Abstract

Disclosed is a clip applier. A jaw assembly is provided with a closed elastic member connected to two clip arms, and the closed elastic member provides a force for the two clip arms to get close to each other. In a clip feeding state, a clip applying mechanism moves distally, enabling the closed elastic member to release energy, thereby allowing the jaw assembly to close. As a clip moves from a clip cartridge to the jaw assembly, the clip gradually releases energy from a semi-closed state to gradually open to an open state. In the process of the clip gradually opening, the clip resists the elastic force of the closed elastic member, enabling the jaw assembly to open again. The elastic force of the closed elastic member can slow down the opening speed of the clip and increase the pressure between the clip and the clip arms, thereby preventing the clip from detaching from and flying out of the jaw assembly, and reducing the failure rate of the clip applier. In addition, a first sleeve can not only keep the jaw assembly open in an initial state, but also allow the jaw assembly to close in a clip applying state, such that the structure of the clip applier is relatively simple.

Description

clamping forceps

[0001] This application claims priority to Chinese Patent Application No. 202411930105.7, filed on December 25, 2024, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] This disclosure relates to a clamping clamp. Background Technology

[0003] During surgical procedures, it is necessary to ligate severed tissues or blood vessels to stop bleeding. A common method is to use clamps to apply clamps to the tissues or blood vessels.

[0004] A clamping forceps consists of a clamping chamber and an end effector. The clamping chamber stores clamps. A complete clamping process typically includes a clamping action and a clamping action. When using a clamping forceps, the forceps perform the clamping action to deliver the clamps stored in the clamping chamber to the end effector. The forceps then perform the clamping action to drive the end effector to close, causing the clamps in the end effector to close and clamp onto tissue or blood vessels, thereby blocking blood flow. After a complete clamping process, the internal motion units of the forceps must be reset before the forceps can perform the next clamping process. Summary of the Invention

[0005] In view of the shortcomings of the prior art, this disclosure aims to provide a clamping clamp.

[0006] This disclosure is achieved through the following technical solution:

[0007] A clamping pliers includes a main body, a clamp body assembly, and a jaw assembly;

[0008] The main body is connected by a fixed structure;

[0009] The jaw assembly includes two jaw arms and a closing elastic member, at least one of the jaw arms is rotatably connected to the fixed structure, the closing elastic member is connected to the two jaw arms, and the closing elastic member is configured to provide a force that brings the two jaw arms closer to each other; the jaw assembly has an open state and a closed state.

[0010] The clamp body assembly is connected to the main body. The clamp body assembly includes a clamp feeding mechanism and a clamping mechanism. The clamp body assembly is configured to install a clamping chamber for accommodating clamps. The clamps have an open state, a semi-closed state, and a closed state. The clamps in the clamping chamber are in the semi-closed state. The clamping mechanism includes a first sleeve, which is sleeved on the fixed structure.

[0011] The clamping clamp has an initial state and a clamping state;

[0012] In the initial state, the first sleeve abuts against the clamp arm, causing the jaw assembly to be in the open state, and the closing elastic element stores energy.

[0013] In the clamping state, in response to the clamping mechanism being driven, the clamping mechanism moves distally, causing the first sleeve to disengage from the clamp arm, and the closing elastic member releases energy, causing the two clamp arms to move closer to each other, thereby switching the jaw assembly from the open state to the closed state; in response to the clamping mechanism moving distally along the axial direction of the clamp body assembly, the clamping mechanism drives the clamp in the clamping chamber to enter the jaw assembly, causing the clamp to open from the semi-closed state to the open state, thereby switching the jaw assembly from the closed state to the open state.

[0014] For example, the first sleeve has a first limiting part, and the clamp arm has a second limiting part;

[0015] In the initial state, the first limiting part is located on the rotation path of the second limiting part when the jaw assembly switches from the open state to the closed state, and the first limiting part abuts against the second limiting part, so that the jaw assembly remains in the open state;

[0016] In the clamping state, in response to the clamping mechanism being driven, the first sleeve moves distally, causing the first limiting part to disengage from the second limiting part and move to a position outside the rotational path of the second limiting part as the jaw assembly switches from the open state to the closed state. As a result, the closing elastic member releases energy, causing the two jaw arms to move closer to each other until the jaw assembly switches to the closed state.

[0017] For example, the second limiting part is located near the rotation axis of the clamp arm, the second limiting part of each clamp arm protrudes away from the other clamp arm, and the first limiting part protrudes relative to the inner wall of the first sleeve.

[0018] In the initial state, the first limiting portion abuts against the second limiting portion on the side of each clamp arm away from the other clamp arm.

[0019] For example, the first limiting part has a first abutting part, and the second limiting part has a second abutting part. In the direction from near to far, at least one of the first abutting part and the second abutting part extends obliquely toward the rotation axis of the clamp arm.

[0020] In the initial state, the first abutting part abuts against the second abutting part;

[0021] In the clamping state, in response to the clamping mechanism being driven, the first sleeve moves distally, causing the first abutment portion to slide relative to the second abutment portion until the first abutment portion disengages from the second abutment portion.

[0022] For example, the closing elastic member has a first connecting structure and a second connecting structure, the first connecting structure abutting against one of the clamp arms and the second connecting structure abutting against the other clamp arm, the first connecting structure and the second connecting structure being configured to have a tendency to move relatively closer or further apart in the initial state, so that the two clamp arms move closer to each other when the closing elastic member releases energy.

[0023] For example, the closing elastic member includes a first abutting section, a connecting section, and a second abutting section. The first abutting section and the second abutting section are both connected to the connecting section. The first abutting section and the second abutting section both extend in a direction from near to far. The first abutting section has the first connecting structure, the second abutting section has the second connecting structure, and the connecting section is elastic.

[0024] For example, the clamp arm includes a body and a limiting protrusion, the limiting protrusion being connected to the side of the body and protruding relative to the body, and the closing elastic element being wound around the limiting protrusion.

[0025] For example, the clamp arm further includes a stop block, which defines a limiting space between itself and the body, and both the first abutting segment and the second abutting segment are at least partially accommodated in the limiting space.

[0026] For example, the closing elastic element is a spring, one end of which has the first connecting structure and the other end has the second connecting structure.

[0027] For example, the clamping pliers also have a clamping state;

[0028] In the clamping state, in response to the clamping mechanism continuing to move distally along the axial direction of the clamp body assembly, the first sleeve moves distally and accommodates at least a portion of each of the clamp arms, causing the jaw assembly to switch from the open state to the closed state, thereby closing the clamps in the jaw assembly from the open state to the closed state.

[0029] For example, the clamp further includes a pre-push assembly, which includes a pre-push member movably connected to the body, the pre-push member having a first position and a second position, the second position being located distal to the first position;

[0030] In the initial state, the pre-push member is located in the first position;

[0031] In the clamping state, in response to the pre-push member being driven, the pre-push member abuts against the clamping mechanism and moves from the first position to the second position, causing the clamping mechanism to move distally, thereby switching the jaw assembly from the open state to the closed state; in response to the clamping mechanism moving distally along the axial direction of the jaw assembly, the pre-push member remains in the second position, and the clamping mechanism drives the clamp into the jaw assembly. Attached Figure Description

[0032] Figure 1 is a perspective view of the clamping forceps provided in some embodiments of this disclosure;

[0033] Figure 2 is a cross-sectional view of a portion of the clamp body assembly and jaw assembly of the clamp shown in Figure 1, wherein the clamp is in its initial state;

[0034] Figure 3 is a cross-sectional view of a portion of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1. In the figure, the clamping pliers are in the clamping state, the clamping mechanism has disengaged from the drive unit, and the clamp has not yet reached the jaw assembly.

[0035] Figure 4 is a cross-sectional view of a portion of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the clamps have reached the jaw assembly;

[0036] Figure 5 is a cross-sectional view of a portion of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the jaw assembly is completely closed;

[0037] Figure 6 is a cross-sectional view of the clamp body assembly and jaw assembly of the clamp shown in Figure 1, wherein the clamp is in the initial state;

[0038] Figure 7 is a cross-sectional view of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1. In the clamping pliers, the clamping mechanism has disengaged from the drive unit and the clamp has not yet reached the jaw assembly.

[0039] Figure 8 is a cross-sectional view of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the clamps have reached the jaw assembly.

[0040] Figure 9 is a cross-sectional view of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the jaw assembly is completely closed;

[0041] Figure 10 is a three-dimensional schematic diagram of the first sleeve of the clamping mechanism of the clamping pliers shown in Figure 1;

[0042] Figure 11 is a three-dimensional schematic diagram of the jaw assembly of the clamping pliers shown in Figure 1;

[0043] Figure 12 is a three-dimensional schematic diagram of the closing elastic element of the jaw assembly of the clamping pliers shown in Figure 1;

[0044] Figure 13-A is a cross-sectional view of a portion of the clamp body assembly and jaw assembly of a clamping pliers provided in some other embodiments of the present disclosure, wherein the clamping pliers are in an initial state;

[0045] Figure 13-B is a cross-sectional view of a portion of the clamp body assembly and jaw assembly shown in Figure 13-A, wherein the clamping clamp is in the clamping state and the clamp has not yet reached the jaw assembly;

[0046] Figure 14-A is a schematic diagram of the jaw assembly of a clamping pliers provided in some other embodiments of the present disclosure, wherein the clamping pliers are in an initial state;

[0047] Figure 14-B is a schematic diagram of the jaw assembly shown in Figure 14-A, wherein the clamping pliers are in the clamping state and the clamps have not yet reached the jaw assembly;

[0048] Figure 15-A is a schematic diagram of the jaw assembly of a clamping pliers provided in some other embodiments of the present disclosure, wherein the clamping pliers are in an initial state;

[0049] Figure 15-B is a schematic diagram of the jaw assembly shown in Figure 15-A, wherein the clamping pliers are in the clamping state and the clamps have not yet reached the jaw assembly;

[0050] Figure 16-A is a schematic diagram of the jaw assembly of a clamping pliers provided in some other embodiments of the present disclosure, wherein the clamping pliers are in an initial state;

[0051] Figure 16-B is a schematic diagram of the jaw assembly shown in Figure 16-A, wherein the clamping pliers are in the clamping state and the clamps have not yet reached the jaw assembly;

[0052] Figure 17 is a schematic diagram of a portion of the clamp shown in Figure 1, in which the clamp is in its initial state;

[0053] Figure 18 is a partial schematic diagram of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state, the clamping mechanism has disengaged from the drive component, and the clamp has not yet reached the jaw assembly.

[0054] Figure 19 is a schematic diagram of a portion of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the clamps have reached the jaw assembly;

[0055] Figure 20 is a partial schematic diagram of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the jaw assembly is not yet fully closed;

[0056] Figure 21 is a schematic diagram of a portion of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state and the jaw assembly is completely closed;

[0057] Figure 22 is a schematic diagram of a portion of the clamp shown in Figure 1, wherein the clamp is in the reset state;

[0058] Figure 23 is a three-dimensional schematic diagram of a portion of the clamp shown in Figure 1, wherein the clamp is in its initial state;

[0059] Figure 24 is a three-dimensional schematic diagram of a portion of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state, the clamping mechanism has disengaged from the drive component, and the clamp has not yet reached the jaw assembly.

[0060] Figure 25 is a cross-sectional view of a portion of the clamping pliers shown in Figure 1, wherein the clamping pliers are in the clamping state, the clamping mechanism has disengaged from the drive unit, and the clamp has not yet reached the jaw assembly.

[0061] Figure 26 is a three-dimensional schematic diagram of the drive component of the pre-push assembly of the clamping clamp shown in Figure 1;

[0062] Figure 27 is a three-dimensional schematic diagram of the clamping chamber installed in the clamping clamp shown in Figure 1;

[0063] Figure 28 is a three-dimensional schematic diagram of the clamping compartment shown in Figure 27 from another angle;

[0064] Figure 29 is a schematic diagram of the clamp stacking in the clamping compartment shown in Figure 27;

[0065] Figure 30 is a top view of the clamp and clip shown in Figure 29;

[0066] Figure 31 is a partial cross-sectional view of the clamp body assembly and jaw assembly of the clamp shown in Figure 1 from another direction, wherein the clamp is in the initial state;

[0067] Figure 32 is a partial cross-sectional view of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1 from another direction, wherein the clamping pliers are in the clamping state and the clamping mechanism begins to move to the distal side.

[0068] Figure 33 is a partial cross-sectional view of the clamp body assembly and jaw assembly of the clamping pliers shown in Figure 1 from another direction, wherein the clamping pliers are in the clamping state and the clamping mechanism moves to the extreme position to the far side.

[0069] Figure 34 is a partial cross-sectional view of the clamp body assembly and jaw assembly of the clamp shown in Figure 1 from another direction, wherein the clamp is in the reset state;

[0070] Figure 35 is a three-dimensional schematic diagram of the hidden clamping component of the clamping pliers shown in Figure 1;

[0071] Figure 36 is a front view of the clamping clamp with the clamping component hidden in Figure 1;

[0072] Figure 37 is a schematic diagram of a portion of the area where the clamping clamp conceals the clamping component shown in Figure 1.

[0073] Reference numerals in the above figures: 100-main body, 110-guide part, 120-clamping member, 130-guide shaft, 140-fixing structure, 141-first fixing member, 142-second fixing member, 142a-mounting groove; 200-clamp body assembly, 210-clamping chamber, 211-clamp, 211a-first clamp, 212-clamping channel, 212a-inlet, 212b-outlet, 213-biasing member, 214-support member, 220-clamping mechanism, 221-first pushing member, 221a-fitting part, 221b-second ratchet, 221c-first driving part, 221d-second abutting structure, 221e-second sliding surface, 221f-second abutting surface, 221g-pushing part, 221 h - Second pushing structure, 222 - Feeding clamp, 222a - First pushing part, 222b - Second pushing part, 222c - Feeding clamp, 223 - First resetting part, 230 - Clamping mechanism, 231 - Second pushing part, 231a - Second driving part, 231b - Fourth abutting structure, 232 - Clamping part, 232a - Second sleeve, 232b - First sleeve, 232c - Pivoting part, 232d - First limiting part, 232e - First abutting part, 233 - Second resetting part; 300-jaw assembly, 310-jaw arm, 311-second limiting part, 311a-second abutting part, 312-body, 313-limiting protrusion, 314-stop block, 315-mounting hole, 320-closing elastic element, 321-first connecting structure, 322-second connecting structure, 323-first abutting section, 324-connecting section, 325-second abutting section; 400-operating assembly, 410-clamping handle, 420-clamping handle; 600-pre-push assembly, 610-pre-push element, 611-first pushing structure, 612-guide groove, 613-mounting protrusion, 620-driving element, 621-stopping structure, 630-first elastic element, 640-second elastic element. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0075] It is important to understand that the terms "proximal," "posterior," "distal," and "anterior" used in this article are relative to the clinician manipulating the handle assembly of the clamp. "Proximal" and "posterior" refer to the portion closer to the clinician, while "distal" and "anterior" refer to the portion farther from the clinician. That is, the manipulator is the proximal end, and the end effector is the distal end. For example, the proximal end of a component refers to the end relatively closer to the manipulator, while the distal end refers to the end relatively closer to the end effector.

[0076] In this disclosure, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluding cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding an integral part, but movable connections are not excluded.

[0077] The term "axial" refers to the length direction of the guide shaft 130.

[0078] The clamping forceps are used to apply clamps 211 to blood vessels or tissues. The clamps 211 are stored in a clamping chamber 210, where they are in a semi-closed state, between an open and closed state. During operation, the clamping forceps first perform a clamping action, delivering the clamps 211 from the clamping chamber 210 to the jaw assembly 300, switching the clamps 211 from the semi-closed state to the open state. Then, the clamping action is performed to close the jaw assembly 300, switching the clamps 211 from the open state to the closed state.

[0079] During the process of switching from a semi-closed state to an open state, the clamp 211 opens and releases energy under its own elasticity. If the opening speed is too fast, the clamp 211 will fall off from the jaw assembly 300 and fly out, thus causing the clamp to malfunction.

[0080] Based on this, referring to Figures 1 to 9, this disclosure provides a clamping pliers, including a main body 100, a clamp body assembly 200, and a jaw assembly 300. The main body 100 is connected to a fixed structure 140; the jaw assembly 300 includes two jaw arms 310 and a closing elastic member 320, at least one jaw arm 310 is rotatably connected to the fixed structure 140, the closing elastic member 320 is connected to the two jaw arms 310, and the closing elastic member 320 is configured to provide a force to bring the two jaw arms 310 closer to each other, the jaw assembly 300 has an open state and a closed state; the jaw body assembly 200 is connected to the main body 100, the jaw body assembly 200 includes a clamping mechanism 220 and a clamping mechanism 230, the jaw body assembly 200 is configured to install a clamping chamber 210 for accommodating a clamp 211; the clamp 211 has an open state, a semi-closed state and a closed state, the clamp 211 in the clamping chamber 210 is in a semi-closed state; the clamping mechanism 230 includes a first sleeve 232b, the first sleeve 232b is sleeved on the fixed structure 140.

[0081] The clamping pliers have an initial state, a clamping state, and a clamping state. One working process of the clamping pliers includes at least the following actions:

[0082] Referring to Figures 2 and 6, in the initial state, the first sleeve 232b abuts against the clamp arm 310, causing the jaw assembly 300 to be in an open state, and the closing elastic element 320 stores energy.

[0083] Referring to Figures 3 and 7, in the clamping state, in response to the clamping mechanism 230 being driven, the clamping mechanism 230 moves distally, causing the first sleeve 232b to disengage from the clamp arm 310. The closing elastic element 320 releases energy, causing the two clamp arms 310 to move closer to each other, thereby switching the jaw assembly 300 from the open state to the closed state. Referring to Figures 4 and 8, in response to the clamping mechanism 220 moving distally along the axial direction of the jaw assembly 200, the clamping mechanism 220 drives the clamp 211 in the clamping chamber 210 to enter the jaw assembly 300, causing the clamp 211 to open from the semi-closed state, thereby switching the jaw assembly 300 from the closed state to the open state.

[0084] Referring to Figures 5 and 9, in the clamping state, in response to the clamping mechanism 230 continuing to move distally along the axial direction of the clamp body assembly 200, the first sleeve 232b moves distally and accommodates a portion of each clamp arm 310, causing the jaw assembly 300 to switch from the open state to the closed state, thereby causing the clamp 211 in the jaw assembly 300 to close from the open state to the closed state.

[0085] In the clamping pliers provided in this embodiment, the jaw assembly 300 is provided with a closing elastic member 320 connected to two jaw arms 310. The closing elastic member 320 provides a force that brings the two jaw arms 310 closer together. In the clamping state, the clamping mechanism 230 moves distally, causing the closing elastic member 320 to release energy, thereby closing the jaw assembly 300. As the clamp 211 moves from the clamping chamber 210 to the jaw assembly 300, the clamp 211 gradually releases energy from the semi-closed state to gradually open to the open state. During the gradual opening of the clamp 211, the elastic force of the clamp 211 against the closing elastic member 320 causes the jaw assembly 300 to open again. The elastic force of the closing elastic member 320 can slow down the opening speed of the clamp 211 and increase the opening speed. The pressure between the clamp 211 and the jaw arm 310 prevents the clamp 211 from falling out of the jaw assembly 300, reducing the failure rate of the clamping pliers. In addition, in the initial state, the first sleeve 232b abuts against the jaw arm 310 to keep the jaw assembly 300 in an open state. In the clamping state, the first sleeve 232b releases from the jaw arm 310 to close the jaw assembly 300. In the clamping state, the first sleeve 232b continues to move distally to close the jaw assembly 300, which was opened by the clamp 211. The first sleeve 232b can both keep the jaw assembly 300 open in the initial state and close the jaw assembly 300 in the clamping state. The structure of the clamping pliers is relatively simple.

[0086] It should be noted that, by way of example, referring to Figures 1, 6 to 9, and 27 to 34, the clamping chamber 210 can be detachably connected to the clamping body assembly 200, and the clamping chamber 210 and the clamping pliers can be independent of each other; alternatively, the clamping chamber 210 can be fixed in the clamping body assembly 200 as part of the clamping pliers. The specific form of the clamping chamber 210 does not affect the operation of the pre-pushing component 600 in the embodiments of this disclosure. The following description uses the example of the clamping chamber 210 being detachably connected to the clamping body assembly 200 to illustrate how the function of the pre-pushing component 600 in this disclosure is realized in a specific application scenario, and should not be construed as a limitation on the concept of this disclosure.

[0087] In some embodiments, referring to FIG10, the first sleeve 232b has a first limiting portion 232d, and referring to FIG11, the clamp arm 310 has a second limiting portion 311. Referring to Figure 2, in the initial state, the first limiting part 232d is located on the rotational path of the second limiting part 311 as the jaw assembly 300 switches from the open state to the closed state. The first limiting part 232d abuts against the second limiting part 311, keeping the jaw assembly 300 in the open state. The first limiting part 232d directly blocks the second limiting part 311 on its rotational path. Referring to Figure 3, in the clamping state, in response to the clamping mechanism 220 being driven, the first sleeve 232b moves distally, causing the first limiting part 232d to disengage from the second limiting part 311 and move to a position outside the rotational path of the second limiting part 311 as the jaw assembly 300 switches from the open state to the closed state, thereby releasing the limiting on the jaw arm 310. This allows the closing elastic element 320 to release energy, causing the two jaw arms 310 to move closer to each other until the jaw assembly 300 switches to the closed state.

[0088] For example, referring to Figures 2 to 5, the second limiting portion 311 is located near the rotation axis of the clamp arm 310. The second limiting portion 311 of each clamp arm 310 protrudes away from the other clamp arm 310, and a first clearance space is formed on the far side of the second limiting portion 311. The first limiting portion 232d protrudes relative to the inner wall of the first sleeve 232b, and a second clearance space is formed near the first limiting portion 232d. Referring to Figure 2, in the initial state, the first limiting portion 232d abuts against the second limiting portion 311 on the side of each clamp arm 310 away from the other clamp arm 310. Referring to Figure 3, in the clamping state, the first sleeve 232b moves to the distal side, causing the first limiting part 232d to move to the distal side of the second limiting part 311. The first limiting part 232d and the second limiting part 311 are offset from each other. The first limiting part 232d enters the second clearance space, and the second limiting part 311 enters the first clearance space, so that the clamp arm 310 can rotate smoothly to put the jaw assembly 300 into the closed state.

[0089] Referring to Figures 2 to 5, 10, and 11, the first limiting portion 232d has a first abutting portion 232e, and the second limiting portion 311 has a second abutting portion 311a. In a direction from near to far, for example, the second abutting portion 311a extends obliquely towards the rotation axis of the clamp arm 310. Referring to Figure 2, in the initial state, the first abutting portion 232e abuts against the second abutting portion 311a. Referring to Figure 3, in the clamping state, in response to the clamping mechanism 230 being driven, the first sleeve 232b moves distally, causing the first abutting portion 232e to slide relative to the second abutting portion 311a until the first abutting portion 232e disengages from the second abutting portion 311a. During this process, the clamp arm 310 gradually rotates as the first abutting portion 232e slides relative to the second abutting portion 311a until the jaw assembly 300 enters the closed state. The movement of the clamp arm 310 is relatively smooth and has high stability.

[0090] For example, referring to Figures 13-A and 13-B, the first abutting portion 232e can be provided to extend obliquely toward the rotation axis of the clamp arm 310; or, the second abutting portion 311a can be provided to extend obliquely toward the rotation axis of the clamp arm 310, and the first abutting portion 232e can extend obliquely toward the rotation axis of the clamp arm 310, both of which can achieve the effects of the above embodiments.

[0091] In other embodiments, the first limiting part 232d may be positioned on one side of the second limiting part 311 in the direction of its rotation axis in the initial state, and the first limiting part 232d abuts against the second limiting part 311, so that a frictional force is generated between them that can prevent the second limiting part 311 from rotating, thereby keeping the jaw assembly 300 in an open state.

[0092] Referring to Figures 2 to 5 and Figures 14-A to 16-B, the closing elastic member 320 has a first connecting structure 321 and a second connecting structure 322. The first connecting structure 321 abuts against one of the clamping arms 310, and the second connecting structure 322 abuts against the other clamping arm 310. The first connecting structure 321 and the second connecting structure 322 are configured to tend to move closer or further apart in the initial state, so that the two clamping arms 310 move closer to each other when the closing elastic member 320 releases energy.

[0093] For example, referring to Figures 2 to 5, Figures 14-A and 14-B, a first connecting structure 321 abuts against one of the clamp arms 310 on the far side of its rotation axis, and a second connecting structure 322 abuts against the other clamp arm 310 on the far side of its rotation axis. The first connecting structure 321 and the second connecting structure 322 are configured to have a tendency to be relatively close in the initial state so that the jaw assembly 300 can enter the closed state when the clamp arm 310 is unconstrained.

[0094] For example, referring to Figures 15-A to 15-B, a first connecting structure 321 abuts against one of the jaw arms 310 near its axis of rotation, and a second connecting structure 322 abuts against the other jaw arm 310 near its axis of rotation. The first connecting structure 321 and the second connecting structure 322 are configured to tend to be relatively far apart in the initial state, so that the jaw assembly 300 can close when the jaw arms 310 are unconstrained.

[0095] For example, referring to Figures 16-A to 16-B, a first connecting structure 321 abuts against one of the jaw arms 310 near its axis of rotation, and a second connecting structure 322 abuts against the other jaw arm 310 near its axis of rotation. The first connecting structure 321 and the second connecting structure 322 are configured to have a tendency to be relatively close in the initial state so that the jaw assembly 300 can close when the jaw arm 310 is unconstrained.

[0096] The closing elastic member 320 has various structural forms. In some embodiments, the closing elastic member 320 includes a first abutting section 323, a connecting section 324 and a second abutting section 325. The first abutting section 323 and the second abutting section 325 both extend in a direction from near to far. The first abutting section 323 has a first connecting structure 321, the second abutting section 325 has a second connecting structure 322, and the connecting section 324 is elastic.

[0097] The connecting segment 324 can have various structural forms. For example, referring to Figures 2 to 5 and Figure 12, the first abutting segment 323, the connecting segment 324, and the second abutting segment 325 are connected sequentially and bent relative to each other. The closing elastic element 320 occupies less space, which is beneficial to reducing the size of the jaw assembly 300. For example, referring to Figures 14-A and 14-B, the connecting segment 324 is spiral-shaped. The central axis of the connecting segment 324 is parallel to the rotation axis of the jaw arm 310. One end of the connecting segment 324 is connected to the first abutting segment 323 and the other end is connected to the second abutting segment 325. That is, the closing elastic element 320 is a torsion spring. The spiral connecting segment 324 can provide greater elastic force and has a longer service life.

[0098] Referring to Figures 2 to 5 and Figure 11, the clamp arm 310 includes a body 312 and a limiting protrusion 313. The limiting protrusion 313 is connected to the side of the body 312 and protrudes relative to the body 312. The closing elastic member 320 is wrapped around the limiting protrusion 313. The limiting protrusion 313 can provide an installation position for the closing elastic member 320 and support the first abutting section 323 and the second abutting section 325 to ensure the stability of the installation of the closing elastic member 320.

[0099] Referring to Figure 11, the clamp arm 310 also includes a stop block 314. The stop block 314 is connected to the side of the limiting protrusion 313 away from the body 312. A limiting space is defined between the stop block 314 and the body 312. The first abutting section 323 and the second abutting section 325 are at least partially accommodated in the limiting space. The stop block 314 and the body 312 can limit the first abutting section 323 and the second abutting section 325 on opposite sides, so that the first abutting section 323 and the second abutting section 325 abut the clamp arm 310 more stably, thereby improving the stability of the closure elastic member 320 installation.

[0100] Referring to Figure 11, the clamp arm 310 has a mounting hole 315. Referring to Figures 2 to 5, a first connecting structure 321 is inserted into the mounting hole 315 of one of the clamp arms 310, and a second connecting structure 322 is inserted into the mounting hole 315 of the other clamp arm 310. The first connecting structure 321 and the second connecting structure 322 abut against the inner wall of the mounting hole 315 to apply a force that brings the two clamp arms 310 closer to each other. The mounting hole 315 can provide reliable limiting for the first connecting structure 321 and the second connecting structure 322 to improve the stability of the closure elastic member 320 during installation.

[0101] In other embodiments, referring to Figures 15-A and 15-B, and Figures 16-A and 16-B, the closing elastic element 320 may also be a spring, with one end of the spring having a first connecting structure 321 and the other end having a second connecting structure 322.

[0102] The following description, in conjunction with Figures 6 to 9 and Figures 17 to 25, illustrates how the clamping clamp, according to some embodiments of this disclosure, drives the clamping mechanism 230 to move distally in the clamping state. It should be noted that the following content is merely illustrative and not intended to limit the scope of this disclosure.

[0103] Referring to Figures 17 to 25, the clamp also includes a pre-push assembly 600, which includes a pre-push member 610 movably connected to the body 100. The pre-push member 610 has a first position and a second position, with the second position located distal to the first position.

[0104] The clamping pliers have an initial state, a clamping state, and a clamping state. A single operation of the clamping pliers includes at least the following actions:

[0105] Referring to Figure 17, in the initial state, the pre-push member 610 is located in the first position;

[0106] Referring to Figures 17-18, 2-3, and 6-7, in the clamping state, in response to the pre-push member 610 being driven, the pre-push member 610 pushes against the clamping mechanism 230 and moves from the first position to the second position, causing the clamping mechanism 230 to move to the distal side and close the jaw assembly 300; referring to Figures 18-19, 3-4, and 7-8, in response to the clamping mechanism 220 moving to the distal side along the axial direction of the jaw assembly 200, the pre-push member 610 remains in the second position, and the clamping mechanism 220 drives the clamp 211 to continue moving to the distal side to enter the jaw assembly 300;

[0107] Referring to Figures 19 to 21, 4 to 5, and 8 to 9, in the clamping state, in response to the clamping mechanism 230 being driven, the clamping mechanism 230 moves distally along the axial direction of the clamp body assembly 200, causing the jaw assembly 300 to close, thereby causing the clamp 211 in the jaw assembly 300 to close.

[0108] Referring to Figures 17 to 25, the pre-push assembly 600 further includes a drive member 620, which is rotatably connected to the main body 100. Referring to Figures 17 to 19 and Figures 23 to 25, in the clamping state, in response to the clamping mechanism 220 moving distally along the axial direction of the clamp body assembly 200, the clamping mechanism 220 pushes against the drive member 620, causing the drive member 620 to rotate, thereby abutting the pre-push member 610 and moving the pre-push member 610 from a first position to a second position.

[0109] Referring to FIG26, the drive member 620 has a stop structure 621. Referring to FIGS. 17 and 23, in the initial state, the drive member 620 is in the initial position; referring to FIGS. 17 to 19 and FIGS. 23 to 25, in the clamping state, in response to the drive member 620 being driven to rotate from the initial position to the stop position, the stop structure 621 abuts against the pre-push member 610. Referring to FIG25, in the projection along the extension direction of the rotation axis of the drive member 620, the line connecting at least one point on the stop structure 621 to the rotation axis of the drive member 620 (i.e., the dashed line shown in FIG25) is parallel to the axial direction of the clamp body assembly 200. At this time, the drive member 620 can be held in the stop position without external force, so that the pre-push member 610 is held in the second position stop structure.

[0110] Referring to FIG25, in the clamping state, in response to the drive member 620 being driven to rotate from the initial position to the stop position, in the projection along the extension direction of the rotation axis of the drive member 620, the line connecting the contact position of the stop structure 621 of the drive member 620 and the pre-push member 610 in the stop position is perpendicular to the axial direction of the clamp body assembly 200, so that the drive member 620 can be held more stably in the stop position.

[0111] Referring to Figures 17 to 22 and Figures 6 to 9, the clamping mechanism 230 includes a second reset member 233 and a second pusher member 231. The second pusher member 231 is movably connected to the main body 100 and is configured to move distally to close the jaw assembly 300. For example, referring to Figures 6 to 9, the clamping mechanism 230 also includes a clamping member 232 connected to the second pusher member 231. When the second pusher member 231 moves distally, it can drive the clamping member 232 to move distally, causing the jaw assembly 300 to close. The second reset member 233 is disposed between the main body 100 and the second pusher member 231 and is configured to store energy when the second pusher member 231 moves distally. The clamping jaw includes a pushing portion 221g, which is disposed on a component for driving the pre-push member 610.

[0112] Referring to Figures 2 to 9, the pre-push member 610 is driven by the clamping mechanism 220 to move from the first position to the second position. Referring to Figure 20, the pushing part 221g is disposed on the clamping mechanism 220.

[0113] In the clamping state, referring to Figures 17 and 18, in response to the clamping mechanism 220 moving distally along the axial direction of the clamp body assembly 200, the clamping mechanism 220 pushes the drive member 620, causing the drive member 620 to rotate distally from its initial position to a stop position, so that the pre-push member 610 moves from a first position to a second position, thereby causing the pre-push member 610 to drive the clamping mechanism 230 to move distally. The second reset member 233 stores energy. At this time, the distal side of the pre-push member 610 abuts against the second push member 231. The second push member 231 transmits the spring force generated by the second reset member 233 toward the proximal side to the pre-push member 610. The proximal side of the pre-push member 610 abuts against the stop structure 621. The drive member 620 applies a force distally to the pre-push member 610. The pre-push member 610 and the drive member 231 move distally. 20. All three components of the clamping mechanism 230 are in force balance. Therefore, referring to Figures 18 to 19, in response to the clamping mechanism 220 continuing to move distally along the axial direction of the clamp body assembly 200, the clamping mechanism 220 disengages from the drive member 620 and continues to push the clamp 211 into the jaw assembly 300. The drive member 620 remains in the stop position, the pre-push member 610 remains in the second position, and the clamping mechanism 230 remains in the position after being pushed by the pre-push member 610. The stable position of the clamping mechanism 230 can prevent the clamping mechanism 230 from accidentally moving and causing the jaw assembly 300 to open during the movement of the clamp 211 towards the jaw assembly 300. Therefore, the reliability of the clamping mechanism 300's constraint on the clamp 211 during the movement of the clamp 211 towards the jaw assembly 300 can be guaranteed.

[0114] Referring to Figures 17 to 22, the pre-push assembly 600 further includes a first elastic member 630. One end of the first elastic member 630 is connected to the main body 100, and the other end of the first elastic member 630 is connected to the pre-push member 610. For example, the pre-push member 610 is provided with a mounting protrusion 613, and the other end of the first elastic member 630 is connected to the mounting protrusion 613.

[0115] Referring to Figure 17, in the initial state, the first elastic member 630 stores energy. For example, the first elastic member 630 may be in a stretched state or a compressed state in the initial state. At this time, the pre-push member 610 is simultaneously subjected to a force applied by the second reset member 233 toward the proximal side and a force applied by the first elastic member 630 toward the distal side. The two forces make the pre-push member 610 subject to force balance.

[0116] Referring to Figures 17 to 19, in the clamping state, in response to the pre-push member 610 pushing against the clamping mechanism 230 and moving from the first position to the second position, the clamping mechanism 230 moves to the distal side, and the first elastic member 630 releases some energy. Compared with the initial state, the force exerted by the first elastic member 630 on the pre-push member 610 towards the distal side is smaller. The pre-push member 610 is simultaneously subjected to the force exerted by the first elastic member 630 towards the distal side, the force exerted by the drive member 620 towards the distal side, and the force exerted by the second reset member 233 towards the proximal side. The above three forces make the pre-push member 610 subject to force balance, so that the pre-push member 610 can be maintained in the second position.

[0117] Referring to Figures 19 to 21, in the clamping state, in response to the clamping mechanism 230 continuing to move distally along the axial direction of the clamp body assembly 200, the clamping mechanism 230 disengages from the pre-push member 610, breaking the force balance state of the pre-push member 610 in the clamping state. At this time, the first elastic member 630 releases energy, causing the pre-push member 610 to move distally from the second position, thereby causing the pre-push member 610 to disengage from the stop structure 621. The drive member 620 loses its constraint and moves from the stop position to the initial position, thereby making room for the reset of the pre-push member 610 and preparing for the reset state of the clamping clamp.

[0118] Referring to Figures 21, 22 and 17, in the reset state, in response to the clamping mechanism 230 and the feeding mechanism 220 moving proximally, the clamping mechanism 230 pushes the pre-push member 610, causing the pre-push member 610 to move to the first position. The first elastic member 630 stores energy again, and the pushing part 221g pushes the driving member 620, causing the driving member 620 to move from the initial position to the avoidance position. Then, the pushing part 221g disengages from the driving member 620, and the driving member 620 moves from the avoidance position back to the initial position.

[0119] The first elastic element 630 is set so that the pre-push element 610 can maintain the position of the clamping mechanism 230 in the clamping state and can also be reset smoothly in the reset state, thus ensuring that the clamping clamp can smoothly complete the cyclic execution action sequence.

[0120] Referring to Figures 17 to 22, the pre-pushing assembly 600 further includes a second elastic member 640, one end of which is connected to the main body 100 and the other end of which is connected to the drive member 620. For example, the second elastic member 640 may be a torsion spring.

[0121] Referring to Figures 17 to 19, in the clamping state, in response to the pushing part 221g pushing drive 620, the drive 620 moves from the initial position to the stop position, and the second elastic member 640 stores energy.

[0122] Referring to Figures 19 to 21, in the clamping state, in response to the clamping mechanism 230 moving distally along the axial direction of the clamp body assembly 200, the first elastic member 630 releases energy, causing the pre-push member 610 to move distally from the second position, thereby disengaging the pre-push member 610 from the stop structure 621a, and the second elastic member 640 releases energy, causing the drive member 620 to move from the stop position to the initial position;

[0123] Referring to Figures 21, 22 and 17, in the reset state, in response to the clamping mechanism 230 and the feeding mechanism 220 moving towards the proximal side, the pushing part 221g pushes the driving member 620, causing the driving member 620 to move from the initial position to the avoidance position. The second elastic member 640 stores energy, and then the pushing part 221g disengages from the driving member 620, and the second elastic member 640 releases energy, causing the driving member 620 to move from the avoidance position to the initial position.

[0124] Referring to Figures 17 to 24, the pre-push member 610 has a guide groove 612, and the main body 100 is connected to a guide portion 110, which is accommodated in the guide groove 612. The extending direction of the guide groove 612 is parallel to the axial direction of the clamp assembly 200. When the pre-push member 610 moves relative to the main body 100, the guide groove 612 moves relative to the guide portion 110. The cooperation between the two can guide the movement of the pre-push member 610, thereby improving the stability of the movement of the pre-push member 610.

[0125] The following description, in conjunction with Figures 6 to 9 and Figures 27 to 37, introduces the structure and operation of the fixing structure 140, clamping mechanism 220, clamping mechanism 230, and clamping chamber 210 in some embodiments of the present disclosure. It should be noted that the following content is merely illustrative and is not intended to limit the scope of this disclosure.

[0126] Referring to Figures 6 to 9, the clamping member 222 includes a first pushing part 222a, a second pushing part 222b, and a clamping part 222c connected sequentially from the proximal side to the distal side. The first pushing part 222a is connected to the first pushing member 221, the second pushing part 222b has elastic deformation capability, and the clamping part 222c is used to push the clamp 211. The clamping member 232 includes a first sleeve 232b, a second sleeve 232a, and a pivoting part 232c. The first sleeve 232b... 32b is rotatably connected to the second sleeve 232a via the pivot 232c. When the second sleeve 232a rotates relative to the first sleeve 232b, the second pushing part 222b can deform. The first sleeve 232b is connected to the second pushing member 231. The jaw assembly 300 is located at the far end of the second sleeve 232a. The clamping member 222 is accommodated inside the clamping member 232. The axial direction of the jaw assembly 200 is the length direction of the first sleeve 232b.

[0127] Referring to Figures 2 to 7, the clamping mechanism 220 and the clamping mechanism 230 are driven by the operating component 400. The operating component 400 includes a clamping handle 410 and a clamping handle 420, both of which are movably connected to the main body 100.

[0128] Referring to Figures 27 and 28, the clamping chamber 210 has a clamping channel 212, with an inlet 212a and an outlet 212b respectively at opposite ends. The clamping chamber 210 stores a plurality of clamps 211, which are stacked sequentially in a direction perpendicular to the inlet 212a to the outlet 212b, with one clamp 211 located in the clamping channel 212. The clamping chamber 210 is also provided with a biasing member 213 and a support member 214. The support member 214 is movably disposed inside the clamping chamber 210 and has a groove for accommodating a single clamp 211. The support member 214 can maintain the orderly stacking of the plurality of clamps 211. One end of the biasing member 213 abuts against the support member 214 to apply a force toward the clamping channel 212 to the plurality of clamps 211 in the clamping chamber 210.

[0129] Referring to Figures 6 to 9, the main body 100 is connected to a fixing structure 140. Referring to Figures 35 to 37, the fixing structure 140 includes a first fixing member 141 and a second fixing member 142. The second fixing member 142 is rotatably connected to the first fixing member 141, and the first fixing member 141 is connected to the main body 100. The jaw assembly 300 includes two jaw arms 310, each of which is rotatably connected at one end to the second fixing member 142. Referring to Figure 37, the second fixing member 142 has a mounting groove 142a for accommodating the clamping chamber 210. Referring to Figure 1, the first sleeve 232b and the second sleeve 232a of the clamping member 232 are both sleeved on the fixing structure 140. The first pushing part 222a, the second pushing part 222b, and the clamping part 222c of the clamping member 222 are all accommodated inside the fixing structure 140. The fixed structure 140 provides an installation base for the clamping member 232 and the feeding member 222, guides the movement of the clamping member 232 and the feeding member 222, and provides installation space for the clamping chamber 210.

[0130] Referring to Figures 6 to 9 and Figures 27 to 28, the clamping chamber 210 is installed on the second sleeve 232a, the inlet 212a of the clamping channel 212 is used to supply the clamping piece 222 into the clamping chamber, and the outlet 212b is connected to the jaw assembly 300.

[0131] In the initial state, referring to Figures 6 and 31, one of the clamps 211 in the clamping chamber 210 is located in the clamping channel 212. For ease of description, this clamp 211 is named the first clamp 211a. The clamping part 222c of the clamping member 222 is located at the inlet 212a of the clamping chamber 210.

[0132] The clamping pliers enter the firing state. Referring to Figures 7 and 8, and Figures 32 and 33, the clamping handle 410 moves relative to the main body 100 and abuts against the first pusher 221, driving the first pusher 221 to move distally. This causes the clamping member 222 to move distally, and the clamping part 222c moves distally along the clamping channel 212 and abuts against the first clamp 211a located in the clamping channel 212. The clamping part 222c continues to move distally so that the first clamp 211a in the clamping channel 212 passes through the outlet 212b and enters... The clamp is inserted into the jaw assembly 300; then, referring to FIG9, the clamping handle 420 moves relative to the main body 100 and abuts against the second pusher 231 to drive the second pusher 231 to move distally, so that the clamping member 232 moves distally, the first sleeve 232b pushes the second sleeve 232a to move distally through the pivot part 232c, and the second sleeve 232a houses part of the clamp arm 310 inside, so that the two clamp arms 310 come closer to each other, thereby causing the first clamp 211a in the jaw assembly 300 to close;

[0133] The clamping clamp enters the reset state. Referring to Figure 34, the clamping member 222 moves to the proximal side, so that the clamping part 222c returns to its initial position after passing through the clamping channel 212. The clamping channel 212 is emptied. The biasing member 213 releases energy and pushes the support member 214 to move in the direction of the clamping channel 212, so that the remaining clamps 211 in the clamping chamber 210 move in the direction of the clamping channel 212 until one clamp 211 reaches the clamping channel 212, preparing for the next firing. The clamping handle 410 and the clamping handle 420 are both reset to their initial positions.

[0134] In summary, in the clamping pliers provided in this embodiment, the jaw assembly 300 is provided with a closing elastic member 320 connected to the two jaw arms 310. The closing elastic member 320 provides a force that brings the two jaw arms 310 closer to each other. In the clamping state, the clamping mechanism 230 moves to the distal side, causing the closing elastic member 320 to release energy, thereby closing the jaw assembly 300. As the clamp 211 moves from the clamping chamber 210 to the jaw assembly 300, the clamp 211 gradually releases energy from the semi-closed state to gradually open to the open state. During the gradual opening of the clamp 211, the elastic force of the clamp 211 against the closing elastic member 320 causes the jaw assembly 300 to open again. The elastic force of the closing elastic member 320 can slow down the opening speed of the clamp 211 and increase the pressure between the clamp 211 and the jaw arms 310, thereby preventing the clamp 211 from falling out of the jaw assembly 300 and reducing the failure rate of the clamping pliers.

[0135] It should be understood that although this disclosure describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0136] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this disclosure and are not intended to limit the scope of protection of this disclosure. All equivalent implementations or modifications made without departing from the spirit of the art of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A clamping pliers, comprising a main body, a clamp body assembly, and a jaw assembly; The main body is connected by a fixed structure; The jaw assembly includes two jaw arms and a closing elastic member, at least one of the jaw arms is rotatably connected to the fixed structure, the closing elastic member is connected to the two jaw arms, and the closing elastic member is configured to provide a force that brings the two jaw arms closer to each other; the jaw assembly has an open state and a closed state. The clamp body assembly is connected to the main body. The clamp body assembly includes a clamp feeding mechanism and a clamping mechanism. The clamp body assembly is configured to install a clamping chamber for accommodating clamps. The clamps have an open state, a semi-closed state, and a closed state. The clamps in the clamping chamber are in the semi-closed state. The clamping mechanism includes a first sleeve, which is sleeved on the fixed structure. The clamping clamp has an initial state and a clamping state; In the initial state, the first sleeve abuts against the clamp arm, causing the jaw assembly to be in the open state, and the closing elastic element stores energy. In the clamping state, in response to the clamping mechanism being driven, the clamping mechanism moves distally, causing the first sleeve to disengage from the clamp arm, and the closing elastic member releases energy, causing the two clamp arms to move closer to each other, thereby switching the jaw assembly from the open state to the closed state; in response to the clamping mechanism moving distally along the axial direction of the clamp body assembly, the clamping mechanism drives the clamp in the clamping chamber to enter the jaw assembly, causing the clamp to open from the semi-closed state to the open state, thereby switching the jaw assembly from the closed state to the open state.

2. The clip applier of Claim 1, wherein, The first sleeve has a first limiting part, and the clamp arm has a second limiting part; In the initial state, the first limiting part is located on the rotation path of the second limiting part when the jaw assembly switches from the open state to the closed state, and the first limiting part abuts against the second limiting part, so that the jaw assembly remains in the open state; In the clamping state, in response to the clamping mechanism being driven, the first sleeve moves distally, causing the first limiting part to disengage from the second limiting part and move to a position outside the rotational path of the second limiting part as the jaw assembly switches from the open state to the closed state. As a result, the closing elastic member releases energy, causing the two jaw arms to move closer to each other until the jaw assembly switches to the closed state.

3. The clip applier of Claim 2, wherein, The second limiting part is located near the rotation axis of the clamp arm, and the second limiting part of each clamp arm protrudes away from the other clamp arm, while the first limiting part protrudes relative to the inner wall of the first sleeve. In the initial state, the first limiting portion abuts against the second limiting portion on the side of each clamp arm away from the other clamp arm.

4. The clip applier of Claim 3, wherein, The first limiting part has a first abutting part, and the second limiting part has a second abutting part. In the direction from near to far, at least one of the first abutting part and the second abutting part extends obliquely toward the rotation axis of the clamp arm. In the initial state, the first abutting part abuts against the second abutting part; In the clamping state, in response to the clamping mechanism being driven, the first sleeve moves distally, causing the first abutment portion to slide relative to the second abutment portion until the first abutment portion disengages from the second abutment portion.

5. The clip applier of any one of Claims 1-4, wherein, The closing elastic member has a first connecting structure and a second connecting structure, the first connecting structure abutting against one of the clamp arms and the second connecting structure abutting against the other clamp arm, the first connecting structure and the second connecting structure being configured to have a tendency to move relatively closer or further apart in the initial state, so that the two clamp arms move closer to each other when the closing elastic member releases energy.

6. The clip applier of Claim, wherein, The closed elastic member includes a first abutting section, a connecting section, and a second abutting section. The first abutting section and the second abutting section are both connected to the connecting section. The first abutting section and the second abutting section extend in a direction from near to far. The first abutting section has the first connecting structure, and the second abutting section has the second connecting structure. The connecting section is elastic.

7. The clip applier of Claim 6, wherein, The clamp arm includes a body and a limiting protrusion. The limiting protrusion is connected to the side of the body and protrudes relative to the body. The closing elastic element is wrapped around the limiting protrusion.

8. The clamping forceps according to claim 7, wherein, The clamp arm also includes a stop block, which defines a limiting space between itself and the body. Both the first abutting section and the second abutting section are at least partially accommodated in the limiting space.

9. The clip applier of any one of Claims 5-8, wherein, The closed elastic element is a spring, one end of which has the first connecting structure and the other end has the second connecting structure.

10. The clip applier of any one of Claims 1-9, wherein, The clamping pliers also have a clamping state; In the clamping state, in response to the clamping mechanism continuing to move distally along the axial direction of the clamp body assembly, the first sleeve moves distally and accommodates at least a portion of each of the clamp arms, causing the jaw assembly to switch from the open state to the closed state, thereby closing the clamps in the jaw assembly from the open state to the closed state.

11. The clamping forceps according to any one of claims 1-10, further comprising a pre-push assembly, the pre-push assembly including a pre-push member movably connected to the body, the pre-push member having a first position and a second position, the second position being located distal to the first position; In the initial state, the pre-push member is located in the first position; In the clamping state, in response to the pre-push member being driven, the pre-push member abuts against the clamping mechanism and moves from the first position to the second position, causing the clamping mechanism to move distally, thereby switching the jaw assembly from the open state to the closed state; in response to the clamping mechanism moving distally along the axial direction of the jaw assembly, the pre-push member remains in the second position, and the clamping mechanism drives the clamp into the jaw assembly.

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