A clip device

Abstract

The embodiments of the present specification provide a clip device. The clip device comprises a sheath tube, a clip arm and a locking piece, the sheath tube comprises a channel, the clip arm comprises at least two clamping parts, the at least two clamping parts comprise a locking state, the locking piece is used for limiting the relative displacement of the at least two clamping parts in the locking state, and the locking piece is released from the sheath tube together with the at least two clamping parts after locking the at least two clamping parts.

Description

Technical Field

[0001] This instruction manual relates to the field of medical devices, and in particular to a clamp device. Background Technology

[0002] Endoscopic hemostatic clips are medical devices used for hemostasis during endoscopic surgery. Due to their flexibility and ease of operation, endoscopic hemostatic clips are widely used in surgical treatments of internal organs such as the gastrointestinal tract and esophagus. Hemostatic clips control bleeding by clamping the tissue wound. However, in follow-up visits for surgical complications, cases of accidental clip dislodgement leading to poor wound healing are common. Therefore, the clamping stability and reliability of hemostatic clips have become a problem that urgently needs to be solved.

[0003] Therefore, this specification provides a clamping device that can resist external force interference in the clamped state, thereby improving the stability and reliability of the clamped state. Summary of the Invention

[0004] This specification provides one or more embodiments of a clamping device, the clamping device comprising: a sheath including a channel; a clamping arm including at least two clamping portions and at least two extension portions, each clamping portion including an interlocking structure, the extension portion being releasably connected to the interlocking structure; and a locking member releasably disposed within the channel of the sheath and located between the at least two extension portions, the locking member being used to cooperate with the interlocking structure to lock the at least two clamping portions.

[0005] This specification provides one or more embodiments of a clamping device, comprising: a sheath including a channel; a clamping arm including at least two clamping portions forming a clamping space between the at least two clamping portions, wherein an interlocking structure is provided on the side of the clamping portion facing the clamping space; and a locking member releasably disposed within the channel of the sheath, the locking member being used to cooperate with the interlocking structure to lock the at least two clamping portions; wherein the locking member includes a stop structure, the interlocking structure includes a locked portion, the locked portion being configured to elastically deform and lock with the stop structure when subjected to force in a first direction, and configured to restrict deformation when subjected to force in a second direction, the second direction being the relative movement direction of the stop structure and the locked portion, and the first direction being non-parallel to the second direction.

[0006] This specification provides one or more embodiments of a clamping device, the clamping device comprising: a clamping arm; a locking member for locking the clamping arm; and a sheath including a blocking structure for releasably limiting the locking member within a channel of the sheath, the blocking structure including a responsive part configured to disengage the blocking structure from the locking member under preset conditions, thereby releasing the locking member from the sheath.

[0007] The clamping device in the above embodiments improves the connection stability and reliability between the locking member and the clamping part and reduces the risk of accidental detachment by setting the locking member between multiple clamping parts, reducing the length of the clamping part, or changing the cooperation structure between the locking member and the clamping part. Attached Figure Description

[0008] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0009] Figure 1 These are exemplary structural diagrams of clamping devices shown in some embodiments of this specification;

[0010] Figure 2 These are exemplary structural block diagrams of clamping devices shown in some embodiments of this specification;

[0011] Figure 3 These are exemplary structural block diagrams of clamping devices shown in other embodiments of this specification;

[0012] Figure 4 This is an exemplary structural block diagram of a clamping device according to some embodiments of this specification;

[0013] Figure 5 This is a partial cross-sectional view of the clamping arm and conveying section shown in some embodiments of this specification;

[0014] Figure 6 This is an exemplary structural diagram of the extension shown in some embodiments of this specification;

[0015] Figure 7 These are exemplary structural diagrams of the clamping portion shown in some embodiments of this specification;

[0016] Figure 8 This is an exemplary structural diagram showing the cooperation of the extension and clamping parts according to some embodiments of this specification;

[0017] Figure 9 These are exemplary structural diagrams of the locking element shown in some embodiments of this specification;

[0018] Figure 10A This is an exemplary structural diagram showing the locking member and clamping part locking according to some embodiments of this specification;

[0019] Figure 10B This is a partial cross-sectional view showing the locking member and clamping part locked according to some embodiments of this specification;

[0020] Figure 11A This is an exemplary structural diagram of the distal end of the sheath shown according to some embodiments of this specification;

[0021] Figure 11B It is based on Figure 11A Partial cross-sectional view of the distal end of the sheath shown in some embodiments;

[0022] Figure 11C It is based on Figure 11A Axial views of the distal end of the sheath shown in some embodiments;

[0023] Figure 12A This is an exemplary structural diagram showing the engagement of the locking element with the sheath according to some embodiments of this specification;

[0024] Figure 12B It is based on Figure 12A Cross-sectional views of the locking element and sheath shown in some embodiments;

[0025] Figure 12C It is based on Figure 12A Axial views of the locking element and sheath shown in some embodiments;

[0026] Figure 13 This is an exemplary structural diagram of a clamping device in the open state, according to some embodiments of this specification;

[0027] Figure 14 This is an exemplary structural diagram of a clamping device in a closed state, according to some embodiments of this specification;

[0028] Figure 15A This is an exemplary structural diagram of a clamping device in a pre-locked state, according to some embodiments of this specification;

[0029] Figure 15B It is based on Figure 15A A magnified view of region A of the clamping device in the pre-locked state;

[0030] Figure 16A This is an exemplary structural diagram of the distal structure of the clamping device shown in some embodiments of this specification;

[0031] Figure 16B It is based on Figure 16AThe clamping device shown is a cross-sectional view taken along section line BB, in which the clamping arm is in a pre-locked state;

[0032] Figure 16C It is based on Figure 16A The clamping device shown is a cross-sectional view taken along section line BB, in which the clamping arm is in a locked state;

[0033] Figure 17A This is an exemplary structural diagram of the distal structure of the clamping device shown in some embodiments of this specification;

[0034] Figure 17B It is based on Figure 17A The clamping device shown is a cross-sectional view taken along section CC, wherein the extension and clamping part are in the released state;

[0035] Figure 18 This is an exemplary structural diagram of a clamping device in the released state according to some embodiments of this specification;

[0036] Figure 19 These are exemplary structural diagrams of the clamping portion shown in some embodiments of this specification;

[0037] Figure 20 These are exemplary structural diagrams of the clamping portion and the extension portion shown in some embodiments of this specification;

[0038] Figure 21 These are exemplary structural diagrams of the locking element shown in some embodiments of this specification;

[0039] Figure 22A This is an exemplary structural diagram showing the locking member and clamping part locking according to some embodiments of this specification;

[0040] Figure 22B This is a partial cross-sectional view showing the locking member and clamping part locked according to some embodiments of this specification;

[0041] Figure 23A This is an exemplary structural diagram of the distal end of the sheath shown according to some embodiments of this specification;

[0042] Figure 23B It is based on Figure 23A Partial cross-sectional view of the distal end of the sheath shown in some embodiments;

[0043] Figure 23C It is based on Figure 23A Axial views of the distal end of the sheath shown in some embodiments;

[0044] Figure 24A This is an exemplary structural diagram showing the engagement of the locking element with the sheath according to some embodiments of this specification;

[0045] Figure 24B It is based on Figure 24A Cross-sectional views of the locking element and sheath shown in some embodiments;

[0046] Figure 24C It is based on Figure 24A Axial views of the locking element and sheath shown in some embodiments;

[0047] Figure 25A This is an exemplary structural diagram of the distal structure of the clamping device shown in some embodiments of this specification;

[0048] Figure 25B It is based on Figure 25A The clamping device shown is a cross-sectional view taken along section DD, where the clamping arm is in a pre-locked state;

[0049] Figure 25C It is based on Figure 25A The clamping device shown is a cross-sectional view taken along section DD, where the clamping arm is in a locked state;

[0050] Figure 26A This is an exemplary structural diagram of the distal structure of the clamping device shown in some embodiments of this specification;

[0051] Figure 26B It is based on Figure 26A The clamping device shown is a cross-sectional view taken along section EE, wherein the extension and clamping part are in the released state;

[0052] Figure 27 This is an exemplary flowchart of a control method for a clamping device according to some embodiments of this specification.

[0053] The reference numerals in the figures include:

[0054] 10. Clamping device; 20. Clamping space; 100. Clamping arm; 110. Clamping part; 110-1. First clamping part; 110-2. Second clamping part; 111. First connecting structure; 112. Interlocking structure; 113. Connecting groove; 114. Guide groove; 115. First locking groove; 116. Actuating inclined surface; 117. Fixing ring; 120. Extension part; 121. Triggering part; 122. Second connecting structure; 1221. Connecting recess; 130. Locked part; 135. Actuating part; 200. Conveying part; 210. Sheath; 211. Blocking structure; 211-1. First blocking structure; 2 11-2, Second blocking structure; 2111, Response part; 212, Second abutment part; 213, First pipe fitting; 214, Second pipe fitting; 220, Mandrel; 230, Fixed section; 240, Rotating section; 300, Control part; 310, Fixed handle; 320, Sliding handle; 400, Locking element; 440, Contact part; 450, First mating part; 460, Second mating part; 470, Main body; 471, Stop structure; 472, Guide pin; 473, Locking protrusion; 474, Limiting recess; 491, First half; 492, Second half; 493, Second locking groove; 494, Base. Detailed Implementation

[0055] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0056] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0057] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0058] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0059] Clip instruments are common surgical instruments used in endoscopy. During surgery, clip instruments achieve hemostasis by clamping tissue wounds. Traditional clip instruments consist of a sheath, a clamping part, and a retractable tube. After the clamping part clamps the tissue, the clamping part closes and moves from distal to proximal until it enters the retractable tube and locks in place. The clamping part and the retractable tube are then released from the sheath and remain in the wound position.

[0060] Traditional clamping devices, due to factors such as the long length of the clamping part and the storage tube or the insecure locking, are prone to accidental separation of the locking part from the clamping part when subjected to disturbances from the surrounding environment in a confined internal space, which is not conducive to wound healing.

[0061] In view of this, in some embodiments of this specification, it is desirable to provide a clamping device that improves the connection stability and reliability between the locking member and the clamping part and reduces the risk of accidental detachment by means of various methods such as setting the locking member between multiple clamping parts, reducing the length of the clamping part, or changing the cooperation structure between the locking member and the clamping part.

[0062] Figure 1 This is an exemplary structural diagram of the clamp device 10 shown according to some embodiments of this specification.

[0063] like Figure 1 As shown, in some embodiments, the clamping device 10 includes a clamping arm 100, a delivery section 200, and a control section 300. The control section 300 is disposed at the proximal end of the delivery section 200, and the clamping arm 100 is disposed at the distal end of the delivery section 200. The terms "proximal end" and "distal end" used in the embodiments of this specification can indicate direction, meaning that along the axial direction of the clamping device 10 (e.g., the extension direction of the sheath 210 of the delivery section 200 within the endoscope channel), the side facing the operator is "proximal end," and the side facing the insertion into the body for treatment is "distal end." "Proximal end" and "distal end" can also refer to portions of structures located in the corresponding directions and should not be construed as referring only to the ends.

[0064] In some applications, the delivery unit 200 has good maneuverability. The delivery unit 200 and its distal clamping arm 100 enter the human body through the endoscope's working channel to approach the tissue to be clamped. Here, tissue refers to the organ tissue of the human body or other organisms. The control unit 300 is located outside the human body or other organisms. The user controls the clamping arm 100 to perform surgical operations by manipulating the control unit 300. For example, the clamping arm 100 can clamp the wound of the tissue to keep the wound closed, thereby assisting wound healing.

[0065] In some embodiments, the delivery unit 200 includes a sheath 210 and a spindle 220. The spindle 220 is disposed within the channel of the sheath 210 and extends axially along the sheath 210. The proximal end of the spindle 220 is connected to the control unit 300, and the distal end of the spindle 220 is connected to the clamping arm 100. In the embodiments described herein, "axial" and "radial" can refer to directions. The "radial" direction is perpendicular to the "axial" direction, or the axial direction is the channel extension direction of the sheath 210, and the radial direction is perpendicular to the channel extension direction of the sheath 210.

[0066] In some embodiments, the sheath 210 may be flexible and bendable in any direction. In some embodiments, the control unit 300 consists of a fixed handle 310 and a sliding handle 320. The sliding handle 320 can slide axially relative to the fixed handle 310. The distal end of the sliding handle 320 is fixedly connected to the proximal end of the mandrel 220. The user controls the axial movement of the sliding handle 320 along the fixed handle 310 externally to control the axial movement of the mandrel 220 within the channel of the sheath 210, so that the clamp arm 100 can perform corresponding surgical operations, such as opening, closing, locking, and releasing.

[0067] This specification provides an exemplary clamping device 10 according to Embodiment 1. The following description, in conjunction with... Figures 2 to 18 The clamp device 10 of Embodiment 1 will be described.

[0068] Figure 2 This is an exemplary structural block diagram of the clamping device 10 shown in some embodiments of this specification.

[0069] like Figure 2 As shown, this specification provides a clamping device 10 in some embodiments, which includes a sheath 210, a clamping arm 100, and a locking member 400.

[0070] In some embodiments, the sheath 210 includes a channel. In some embodiments, the channel of the sheath 210 is used to accommodate control structures such as the spindle 220, and structures such as at least a portion of the clamping arm 100 (such as the extension 120) and the locking member 400.

[0071] In some embodiments, the clamping arm 100 includes at least two clamping portions 110 and at least two extension portions 120. The proximal end of the extension portion 120 is connected to the spindle 220 and is releasably connected to the clamping portion 110. In this specification, "releasably connected" in the embodiments can mean that the two components remain connected when a preset condition is met (e.g., when the applied external force is less than a preset threshold), and release from each other and separate when the preset condition is not met (e.g., when the applied external force is greater than a preset threshold).

[0072] In some embodiments, the extension 120 includes an extended state and a retracted state. For example, in the extended state, the distal end of the extension 120 extends outside the sheath 210 channel, maintaining a preset distance between the proximal end of the clamping portion 110 and the distal end of the sheath 210; wherein the preset distance can be determined based on the size of the ambient space, structural characteristics of the extension 120, etc. When the extension 120 extends out of the sheath 210 channel, maintaining a preset distance between the proximal end of the clamping portion 110 and the distal end of the sheath 210 optimizes the clamping space 20, for example, by providing a larger opening span for the clamping portion 110.

[0073] In some embodiments, the clamping portion 110 includes a first clamping portion 110-1 and a second clamping portion 110-2. When the clamping portion 110 is in the open state, the distal end of the first clamping portion 110-1 and the distal end of the second clamping portion 110-2 are separated. The extension portion 120 can also separate the proximal end of the first clamping portion 110-1 and the proximal end of the second clamping portion 110-2, thereby providing a sufficiently large span for the clamping portion 110 to clamp more tissue.

[0074] In some embodiments, in the retracted state, the extension 120 is received within the channel of the sheath 210, causing at least two clamping portions 110 to close. For example, the extension 120 moves from the distal end to the proximal end, and the sheath 210 compresses the clamping portions 110 together by squeezing the extension 120 until the clamping portions 110 are closed.

[0075] In some embodiments, when the clamping portion 110 is closed or locked, the distal ends of the first clamping portion 110-1 and the second clamping portion 110-2 abut against each other (or against the clamped tissue) and close, and the proximal ends of the first clamping portion 110-1 and the second clamping portion 110-2 also abut against each other and close. In some embodiments, after the clamping portion 110 is locked, the extension portion 120 can be released from the clamping portion 110, and the extension portion 120 and the sheath 210 can be withdrawn from the body through the endoscope channel, while the clamping portion 110 and the locking portion remain in the body. The releasable connection between the clamping portion 110 and the extension portion 120 allows the extension portion 120 and the delivery portion 200, which do not contact the tissue, to be withdrawn from the body, while the clamping portion 110 remains in the body and continuously clamps the wound, promoting wound healing.

[0076] In some embodiments, each clamping portion 110 includes an interlocking structure 112, and the extension 120 is releasably connected to the interlocking structure 112. For example, at least a portion of the distal end of the extension 120 is releasably connected to the interlocking structure 112. For more exemplary embodiments involving interlocking structures, please refer to... Figure 7 And its related descriptions.

[0077] In some embodiments, the locking member 400 is releasably disposed within the channel of the sheath 210 and located between at least two extensions 120. In some embodiments, the locking member 400 is configured to cooperate with an interlocking structure 112 of at least two clamping portions, such that at least two clamping portions 110 remain relatively stationary and are in a locked state.

[0078] In some embodiments, the locking member 400 is releasably engaged with the sheath 210, and when subjected to external force, the locking member 400 can be released from the sheath 210 and disengage from the sheath 210 channel. In some embodiments, at least two passages are formed between the two sides of the locking member 400 and the inner wall of the sheath 210 channel, each passage allowing the extension 120 to extend from inside the sheath 210 channel to outside the sheath 210 channel.

[0079] According to the scheme in the above embodiments, by setting the interlocking structure 112 to cooperate with both the extension 120 and the locking member 400, the functions of connection and locking are integrated into the interlocking structure 112, making the overall structure more compact and the clamping part 110 smaller. Furthermore, by placing the locking member 400 within the channel of the sheath tube 210, the size of the locking member 400 is reduced, and the size of the locking member 400 after cooperating with the clamping part 110 is also smaller. Compared to the conventional clamping part 110, the retention length of the locking member 400 and the clamping part 110 can be reduced by 30% to 70%. The small-sized locking member 400 and clamping part 110 are less likely to be disturbed by the environment in the confined space inside the body, thereby preventing the clamping part from being accidentally separated due to external force; in addition, the locking member 400 is located inside the extension part 120, which solves the problem of the limited opening angle of the extension part 120, that is, the opening angle of the extension part 120 is not limited by the locking member 400, so that the clamping part 110 can obtain a larger clamping space 20.

[0080] Figure 3 This is an exemplary structural block diagram of the clamp device 10 shown in other embodiments of this specification.

[0081] like Figure 3 As shown, this specification provides a clamping device 10 in some embodiments, which includes a sheath 210, a clamping arm 100, and a locking member 400.

[0082] In some embodiments, the sheath 210 includes a channel. In some embodiments, the channel of the sheath 210 is used to receive the mandrel 220 (the mandrel 220 is in...). Figure 5 (as shown in the figure) control structures, as well as structures for accommodating at least a portion of the clamping arm 100, locking member 400, etc.

[0083] In some embodiments, the clamping arm 100 includes at least two clamping portions 110, forming a clamping space 20 between the at least two clamping portions 110. In some embodiments, the clamping arm 100 includes an open state and a closed state. In the open state, the at least two clamping portions 110 are spaced apart, allowing tissue (such as human organ tissue) to enter the clamping space 20. In the closed state, the at least two clamping portions 110 are close together, confining the tissue within the reduced clamping space 20 and promoting the closure of tissue wounds.

[0084] In some embodiments, the clamping portion 110 is provided with an interlocking structure 112 on the side facing the clamping space 20. A locking member 400 is releasably disposed within the channel of the sheath tube 210 and is used to cooperate with the interlocking structure 112 to lock at least two clamping portions 110 in a locked state. Since the interlocking structure 112 is disposed on the side of the clamping portion 110 facing the clamping space 20, that is, the locking member 400 locks the interlocking structure 112 inside at least two clamping portions 110, it does not occupy the space outside the clamping portion 110, making the structure of the clamping portion 110 more compact and smaller after closing, thereby reducing the probability of the clamping portion 110 being disturbed by external forces in the narrow space inside the body.

[0085] In some embodiments, the locking member 400 includes a stop structure 471, and the interlocking structure 112 includes a locked portion 130. The stop structure 471 can be a structure for restricting the locked portion 130 within a preset relative position or a preset relative movement range. The stop structure 471 includes, but is not limited to, various types of structures such as protrusions, blocks, limit pins, spring clips, and limit grooves.

[0086] In some embodiments, the locked portion 130 is configured to be elastically deformed and locked by the stop structure 471 when subjected to force in a first direction, and is configured to restrict deformation when subjected to force in a second direction. The second direction is the relative movement direction between the stop structure 471 and the locked portion 130, such as the axial direction of the sheath 210. The first direction is not parallel to the second direction; for example, the first direction includes any direction perpendicular to the second direction, or can be understood as the width or thickness direction of the clamping portion 110.

[0087] Through the cooperation of the locking member 400 and the interlocking structure 112 in the above embodiments, after the locking member 400 and the interlocking structure 112 are engaged, the clamping part 110 is locked. If the clamping part 110 is disturbed by external force and the locking member 400 tends to separate from the clamping part 110, the locking member 400 tends to move relative to the clamping part 110 in the second direction. The locked part 130 will not deform even if it is subjected to force in the second direction, so that the stop structure 471 cannot separate from the locked part 130, and the locking member 400 and the clamping part 110 remain engaged. In summary, through the structure of the stop structure 471 and the locked part 130, the reliability and stability of the engagement between the locking member 400 and the clamping part 110 can be improved, and the ability of the clamping part 110 and the locking member 400 to resist external disturbances can be enhanced.

[0088] Figure 4 This is an exemplary structural block diagram of the clamping device 10 according to some embodiments of this specification.

[0089] like Figure 4 As shown, this specification provides a clamping device 10 in some embodiments, which includes a sheath 210, a clamping arm 100, and a locking member 400.

[0090] In some embodiments, the sheath 210 includes a channel. In some embodiments, the channel of the sheath 210 is used to receive the mandrel 220 (the mandrel 220 is in...). Figure 5 (as shown in the figure) control structures, as well as structures for accommodating at least a portion of the clamping arm 100, locking member 400, etc.

[0091] In some embodiments, the clamping arm 100 is used to clamp the tissue wound, and the locking member 400 is used to lock the clamping arm 100 to keep the tissue wound closed.

[0092] In some embodiments, the sheath 210 includes a stop structure 211, through which the locking member 400 is releasably disposed within the channel of the sheath 210. In some embodiments, the stop structure 211 can restrict the movement of the locking member 400 along the axial direction of the sheath 210. The stop structure 211 is configured to fail to limit the movement of the locking member 400 from the proximal end to the distal end due to breakage, displacement, or deformation, allowing the locking member 400 to be released from the sheath 210. By disposing the locking member 400 within the channel of the sheath 210, the locking member 400 is miniaturized, reducing the probability of external environmental disturbances affecting the locking member 400. Furthermore, since the locking member 400 cooperates with the sheath 210 through the stop structure 211, the clamping part 110 does not contact the locking member 400 during opening or closing operations, and the movement of the clamping part 110 or other components (such as the extension 120) does not affect the connection stability of the locking member 400.

[0093] In some embodiments, the blocking structure 211 includes a response unit 2111, which is configured to drive the blocking structure 211 to disengage from the locking member 400 under preset conditions, thereby releasing the locking member 400 from the sheath 210. By providing the response unit 2111, the locking member 400 is only released when the preset conditions are met, avoiding accidental release and improving the safety of the clamping device 10. Furthermore, in some application scenarios, the response unit 2111 is only triggered to meet the preset conditions after the clamping arm 100 is in the closed state or before the locked state, causing the locking member 400 to release from the sheath 210. This facilitates precise control of the operation steps of the clamping device 10 and reduces operational complexity.

[0094] In some embodiments, the preset conditions include, but are not limited to: the responding part 2111 is subjected to a force greater than a second preset force value along the radial direction of the sheath 210; the area of ​​the responding part 2111 being compressed is greater than a preset area, etc. In some embodiments, when the responding part 2111 meets the preset conditions, the blocking structure 211 deforms outward along the radial direction of the sheath 210, and the blocking structure 211 is released from engagement with the locking member 400. For more exemplary embodiments of the responding part 2111, please refer to... Figures 11A to 12C And its related descriptions.

[0095] The following is combined with Figures 5 to 18 Some exemplary structures of the clamp device 10 of Embodiment 1 are described in detail. It should be noted that those skilled in the art can make various combinations and modifications of the features in the various embodiments described below and above, guided by this specification, and these combinations and modifications are still within the scope of this specification. Furthermore, some embodiments described below are merely illustrative and do not limit the scope of this specification.

[0096] Figure 5 This is a partial cross-sectional view of the clamping arm 100 and the conveying section 200 shown in some embodiments of this specification.

[0097] like Figure 5 As shown, the clamping arm 100 includes at least two clamping portions 110, at least two extensions 120, and a locking member 400. The delivery portion 200 includes a sheath 210 and a spindle 220. In some embodiments, the locking member 400 is releasably disposed within a channel of the sheath 210. In some embodiments, the clamping portions 110 and the extensions 120 are releasably connected. In some embodiments, the clamping portions 110 and the extensions 120 are integrally formed.

[0098] In some embodiments, when the clamping arm 100 is in the open state, at least two clamping portions 110 are spaced apart from each other, and the distal end of the extension 120 extends outside the sheath tube 210 channel, so that the clamping portions 110 are located outside the sheath tube 210 channel. The locking member 400 is releasably engaged with the sheath tube 210 via the abutment structure 211 and is located within the sheath tube 210 channel. In some embodiments, when the clamping arm 100 is in the open state, the interlocking structure 112 and the extension 120 are connected and located outside the sheath tube 210 channel, while the locking member 400 is located within the sheath tube 210 channel.

[0099] In some embodiments, when the clamping arm 100 is in the closed state, at least two clamping portions 110 are close to each other and in contact with the locking member 400. The interlocking structure 112 and the extension 120 are connected. At least a portion of the extension 120 is located outside the sheath tube 210 channel, and at least a portion of the extension 120 is retracted into the sheath tube 210 channel. At least two clamping portions 110 remain outside the sheath tube 210 channel. During the operation of clamping the tissue with the clamping portions 110, the clamping portions 110 are always located outside the sheath tube 210 channel, which can prevent the distal end of the sheath tube 210 from contacting the tissue, thereby improving the clamping stability of the tissue in the clamping space 20.

[0100] In some embodiments, when the clamping arm 100 is in the locked state, at least a portion of at least two clamping portions 110 extend into the channel of the sheath 210, and at least two clamping portions 110 cooperate with the locking member 400. For example, the interlocking structure 112 of the clamping portion 110 forms a limiting cooperation with the locking member 400, thereby locking at least two clamping portions 110. In some embodiments, when the clamping arm 100 is in the locked state, the interlocking structure 112 is simultaneously connected to the extension portion 120 and the locking member 400, and both the interlocking structure 112 and the locking member 400 are located within the channel of the sheath 210. In some embodiments, the locking process of the clamping arm 100 includes: when the extension portion 120 cooperates with the interlocking structure 112, the extension portion 120 drives the interlocking structure 112 to move from the distal end to the proximal end until at least a portion of the interlocking structure 112 cooperates with the locking member 400.

[0101] In some embodiments, the clamp arm 100 includes a pre-release state, which is performed before, simultaneously with, or after the locking state. The pre-release state includes: the interlocking structure 112 and the extension 120 are connected; the locking member 400 is disengaged from the blocking structure 211 of the sheath 210; the locking member 400 is released from the sheath 210; and the interlocking structure 112 and the locking member 400 remain within the channel of the sheath 210.

[0102] In some embodiments, when the clamping arm 100 is in the released state, the locking member 400 is disengaged from the blocking structure 211 of the sheath 210, the interlocking structure 112 is disconnected from the extension 120, the extension 120 is released from the clamping part 110, and the locking member 400 engages with the interlocking structure 112, so that at least two clamping parts 110 are released from the distal end of the sheath 210 to the outside of the sheath 210 channel in the locked state and remain at the tissue wound site, and other components such as the extension 120, sheath 210, and spindle 220 are withdrawn from the human body.

[0103] In some embodiments, the sheath 210 includes a fixed section 230 and a rotating section 240, the proximal end of the rotating section 240 being rotatably connected to the distal end of the fixed section 230, and the rotating section 240 being configured to rotate about the axis of the sheath 210. In some embodiments, one of the rotating section 240 and the fixed section 230 is provided with an annular groove, and the other is provided with a slider, the annular slider and the annular groove being slidably engaged, allowing the rotating section 240 to rotate relative to the fixed section 230. In some embodiments, the annular groove extends along the circumferential direction of the sheath 210, and the annular slider is embedded in the annular groove to limit the axial displacement of the rotating section 240 and the fixed section 230 relative to the sheath 210. In some embodiments, an operating handle controls the rotation of the spindle 220, and the rotation of the spindle 220 causes the clamping arm 100 and the rotating section 240 to rotate simultaneously relative to the fixed section 230. By setting the rotating section 240 so that the clamping arm 100 can rotate around the axis of the sheath tube 210, it is easier to adjust the closing direction of at least two clamping parts 110 to be consistent with the closing direction of the tissue wound, thereby improving the accuracy of clamping the tissue wound.

[0104] In some embodiments, the sheath 210 is a one-piece molded structure, which facilitates processing and saves costs.

[0105] Figure 6 This is an exemplary structural diagram of the extension 120 shown according to some embodiments of this specification. Figure 7 This is an exemplary structural diagram of the clamping part 110 shown according to some embodiments of this specification. Figure 8 This is an exemplary structural diagram showing the cooperation of the extension 120 and the clamping part 110 according to some embodiments of this specification.

[0106] like Figures 6 to 8 As shown, in some embodiments, the clamping part 110 includes an interlocking structure 112, the interlocking structure 112 includes a first connecting structure 111, and the extension part 120 includes a second connecting structure 122. The first connecting structure 111 and the second connecting structure 122 are releasably connected, so that the clamping part 110 can be released from the extension part 120.

[0107] In some embodiments, the second connecting structure 122 includes two elastic arms, each elastic arm including a distal end, a middle portion, and a proximal end, the middle portion of the elastic arm being configured as a connecting recess 1221. In some embodiments, the interlocking structure 112 includes two interlocking plates, the two interlocking plates respectively starting from the two sides of the proximal end of the clamping portion 110 and rolled towards the central axis of the clamping portion 110, a connecting groove 113 being formed between the interlocking plates and the clamping portion 110, the connecting groove 113 constituting the first connecting structure 111. The central axis of the clamping portion 110 refers to the axis extending along the length direction of the clamping portion 110 and located in the middle of the clamping portion 110. In some embodiments, when the first connecting structure 111 is connected to the second connecting structure 122, the two elastic arms pass through the connecting groove 113, causing the connecting recess 1221 of the elastic arm to engage with the connecting groove 113. The inner surface of the distal end of the connecting recess 1221 is fitted and limited against the distal surface of the connecting groove 113, and the inner surface of the proximal end of the connecting recess 1221 is fitted and limited against the proximal surface of the connecting groove 113. In some embodiments, a bevel is formed at the distal end of the elastic arm, which is used to guide the extension 120 into the connecting groove 113, making it easier for the extension 120 to engage with the clamping part 110.

[0108] In some embodiments, the inner surface of the distal end of the connecting recess 1221 and the distal surface of the connecting groove 113 are both perpendicular to the axial direction of the extension 120, and / or, the inner surface of the proximal end of the connecting recess 1221 and the proximal surface of the connecting groove 113 are both perpendicular to the axial direction of the extension 120. The axial direction of the extension 120 may be... Figure 8 The direction indicated by the middle arrow D2. When the extension 120 moves from the distal end to the proximal end, the connecting recess 1221 and the connecting groove 113 form a limit, keeping the clamping part 110 and the extension 120 connected, and preventing the clamping part 110 and the extension 120 from being accidentally separated due to being pulled apart by axial force.

[0109] In some embodiments, the extension 120 or the clamping portion 110 includes a trigger portion 121, which is configured to trigger the release of the extension 120 from the clamping portion 110 when subjected to a force in a first direction greater than a first preset force value; wherein the first direction is not parallel to the movement direction of the extension 120, for example, the first direction may be an adjacent direction. Figure 8The direction indicated by the middle arrow D1, or the first direction, can be the width direction of the clamping part 110, or the first direction can be an angled direction to the width direction of the clamping part 110. During the process of the extension part 120 moving the clamping part 110 from the distal end to the proximal end, when the clamping part 110 is locked and the locking member 400 is released from the sheath 210, a pulling force is generated between the extension part 120 and the clamping part 110 along the movement direction of the extension part 120. By providing the trigger part 121, the extension part 120 can only be released from the clamping part 110 when triggered by the trigger part 121, which can avoid accidental dislodgement of the two due to the pulling force between the extension part 120 and the clamping part 110 along the movement direction, and reduce surgical risks.

[0110] In some embodiments, the trigger portion 121 is provided on the second connection structure 122. For example, the proximal end of the elastic arm is provided with a slope, which constitutes the trigger portion 121.

[0111] In some embodiments, the locking member 400 includes a first abutment portion 480 (e.g., Figure 9 As shown, the first abutment portion 480 is used to drive the trigger portion 121, causing the distal end of the extension portion 120 to break, deform, or displace and release from the clamping portion 110. For example, the first abutment portion 480 may be a protrusion located near the end of the locking member 400. When the trigger portion 121 contacts the first abutment portion 480, that is, when the protrusion of the locking member 400 contacts the inclined surface near the end of the elastic support arm of the extension portion 120, the force applied by the protrusion to the inclined surface can deform the two elastic support arms and bring them closer together, causing the connecting recess 1221 on the elastic support arm to disengage from the connecting groove 113 of the interlocking structure 112, and releasing the extension portion 120 from the clamping portion 110. In other embodiments, the first abutment portion 480 may also include, but is not limited to, the end face of the distal end of the sheath 210 or a protrusion (such as a blocking structure) located within the channel of the sheath 210.

[0112] In some embodiments, a gap is formed between the two elastic arms of the extension 120, and the proximal end of the gap is formed into a V-groove, which makes it easier for the two elastic arms to deform and for the extension 120 and the clamping portion 110 to be released.

[0113] Figure 9 This is an exemplary structural diagram of the locking member 400 shown according to some embodiments of this specification. Figure 10A This is an exemplary structural diagram showing the locking member 400 locking with the clamping part 110 according to some embodiments of this specification. Figure 10B This is a partial cross-sectional view showing the locking member 400 locked with the clamping part 110 according to some embodiments of this specification.

[0114] like Figure 7 , Figures 9 to 10BAs shown, in some embodiments, the interlocking structure 112 further includes a locked portion 130 for locking with the locking member 400. In some embodiments, the interlocking structure 112 includes two interlocking plates rolled up from both sides of the clamping portion 110, the ends of the two interlocking plates forming the locked portion 130. In some embodiments, the interlocking structure 112 is configured to have a wider dimension in the second direction, so that the locked portion 130 also has a wider dimension in the second direction, thereby improving the stability of the locking.

[0115] In some embodiments, the size of the clamping part 110 in the second direction is approximately in the range of 4mm to 15mm. If the size of the clamping part 110 in the second direction is less than 4mm, it is difficult to close the wound; if the size of the clamping part 110 in the second direction is greater than 15mm, it is difficult to pass through the endoscope delivery channel. Therefore, setting the size of the clamping part 110 in the second direction within the above-mentioned range can effectively close the wound while allowing it to pass smoothly through the endoscope delivery channel. In some embodiments, the size of the clamping part 110 in the second direction can be set to approximately 6.5mm, balancing clamping reliability and structural compactness. In other embodiments, the size of the clamping part 110 in the second direction can be set to 8mm, 10mm, 12mm, etc.

[0116] In some embodiments, the dimension of the interlocking structure 112 in the second direction is approximately in the range of 0.5 mm to 4 mm. If the dimension of the interlocking structure 112 in the second direction is less than 0.5 mm, it will affect the connection stability between the first connecting structure 111 and the second connecting structure 122 of the extension 120, as well as the reliability of the engagement between the locked part 130 and the locking member 400. If the dimension of the interlocking structure 112 in the second direction is greater than 4 mm, it will occupy the clamping space 20 between the clamping parts 110, affecting the clamping part 110 from clamping a sufficient amount of tissue. Based on this, setting the dimension of the interlocking structure 112 in the second direction within the above-mentioned range can ensure the connection stability between the first connecting structure 111 and the second connecting structure 122 of the extension 120, as well as the reliability of the engagement between the locked part 130 and the locking member 400, while also providing the clamping part 110 with sufficient clamping space 20 to clamp a sufficient amount of tissue, thereby improving the connection stability between the clamping part 110 and the tissue. In some embodiments, the interlocking structure 112 may be 1 mm in size in the second direction. This ensures both the stability and reliability of the connection with the extension 120 and the locking member 400, and also provides a sufficiently large clamping space 20 for the clamping part 110 to hold a sufficient amount of tissue and effectively close the wound. In other embodiments, the interlocking structure 112 may be 2 mm, 3 mm, etc., in size in the second direction.

[0117] In some embodiments, the ratio of the size of the interlocking structure 112 to the size of the clamping portion 110 in the second direction is in the range of 0.05 to 0.5. In some embodiments, the ratio of the size of the interlocking structure 112 to the size of the clamping portion 110 in the second direction is in the range of 0.1 to 0.3. In some embodiments, the ratio of the size of the interlocking structure 112 to the size of the clamping portion 110 includes, but is not limited to, 0.15, 0.2, 0.25, 0.3, 0.35, etc. By adjusting the ratio of the interlocking structure 112 and the clamping portion 110 within the above ranges, the functions of the interlocking structure 112 and the clamping portion 110 are ensured, while the overall structure is made more compact and small. For example, the interlocking structure 112 and the extension portion 120 have strong connection stability, the interlocking structure 112 also has high reliability in cooperation with the locking member 400, and there is sufficient control between the two clamping portions 110 to clamp the tissue, thereby achieving effective closure of the tissue wound.

[0118] In some embodiments, the locked portion 130 of the interlocking structure 112 is configured to undergo elastic deformation and lock with the stop structure 471 when subjected to force in a first direction, and is configured to restrict deformation when subjected to force in a second direction. The second direction is the adjacent direction. Figure 7 The direction indicated by the middle arrow D2 can be understood as the length direction of the clamping part 110. The first direction includes any direction perpendicular to the second direction, as shown in the attached figure. Figure 7 The direction indicated by the middle arrow D1 can be understood as the width or thickness direction of the clamping part 110, etc.

[0119] In some embodiments, the locking member 400 includes a main body 470 and stop structures 471 respectively disposed on both sides of the main body 470. The stop structures 471 are used to form a limiting engagement with the locked portion 130, thereby locking the clamping portion 110 with the locking member 400. In some embodiments, the stop structure 471 includes a guide pin 472 and at least one locking protrusion 473. The guide pin 472 is arranged along a second direction to guide the stop structure 471 into the locked portion 130 along the second direction and to form a limiting engagement with the locked portion 130 in a first direction. The locking protrusion 473 protrudes from at least one side of the guide pin 472 along the first direction. After engaging with the locked portion 130, the locking protrusion 473 can limit the relative displacement in the second direction. In some embodiments, at least one locking protrusion 473 is formed on each side of the guide pin 472. The positions of the locking protrusions 473 on opposite sides can correspond in the second direction or can be staggered. In some embodiments, the locking protrusion 473 is formed on one side of the guide pin 472. The number of locking protrusions 473 includes, but is not limited to, 1, 2, 3, 4, etc.

[0120] In some embodiments, the distal and proximal surfaces of the locking protrusion 473 are perpendicular to the second direction. When the locking protrusion 473 engages with the locked portion 130, the interaction force between the locking protrusion 473 and the locked portion 130 is perpendicular to the distal and proximal surfaces, that is, the interaction force is perpendicular to the second direction. It is configured to be subjected to force along the second direction to limit deformation, thereby preventing the locking protrusion 473 from disengaging from the locked portion 130 and improving the locking firmness and stability.

[0121] In some embodiments, the interlocking structure 112 includes interlocking pieces located on both sides of the clamping portion 110. Each interlocking piece includes a fixed end connected to the side of the clamping portion 110 and a suspended end facing the central axis of the clamping portion 110. A guide groove 114 and a first locking groove 115 are formed between the two suspended ends. The guide groove 114 is adapted to the guide pin 472, and the first locking groove 115 is adapted to the locking protrusion 473. Here, "adapted" can be understood as matching physical characteristics such as size, shape, and fixing method. For example, the size and shape of the guide groove 114 are designed to fit the guide pin 472, and the size and shape of the first locking groove 115 are designed to fit the locking protrusion 473. Through the cooperation of the guide pin 472 and the guide groove 114, and the cooperation of the locking protrusion 473 and the locking member, the displacement of the locking member 400 and the clamping portion 110 in the first and second directions can be restricted, improving locking stability.

[0122] In some embodiments, the suspension end is provided with an actuating ramp 116, which is arranged towards the proximal end of the clamping portion 110. When the guide pin 472 of the locking member 400 enters the guide groove 114, the locking protrusion 473 contacts the actuating ramp 116, and the clamping portion 110 continues to move closer to the locking member 400, so that the locking protrusion 473 applies force to the actuating ramp 116. When the force on the actuating ramp 116 in the first direction is greater than a preset force value, it can drive the two interlocking pieces to undergo elastic deformation in the first direction, so that the size of the guide groove 114 in the first direction widens. At this time, the locking protrusion 473 can enter the guide groove 114 and continue to enter the locking groove. After the locking protrusion 473 engages with the locking groove, the two interlocking pieces return to their original shape, so that the guide groove 114 and the guide pin 472 are in a limited engagement, and the locking groove and the locking protrusion 473 are in a limited engagement, thus locking the locking member 400 and the clamping portion 110.

[0123] In some embodiments, the clamping portion 110 includes a retaining ring 117 disposed on the distal end of the interlocking structure 112, and the locking member 400 includes a limiting recess 474. When the clamping portion 110 is locked with the locking member 400, the retaining rings 117 of at least two clamping portions 110 are engaged within the limiting recess 474. In some embodiments, the limiting recess 474 is disposed on the body 470 of the locking member 400 and is recessed from the distal surface of the body 470 towards the proximal end. By providing the retaining ring 117 and the limiting recess 474 to engage, at least two clamping portions 110 can be confined within the same limiting recess 474, ensuring stable locking of at least two clamping portions 110 and improving the reliability of the locking member 400.

[0124] In some embodiments, the locking member 400 includes a contact portion 440 located at the distal end of the locking member 400, the contact portion 440 being used to provide feedback resistance to prompt the operator to enter the locked state. In some embodiments, the locking protrusion 473 of the locking member 400 is configured as the contact portion 440, which is used to contact the actuating ramp 116 of the interlocking structure 112 and generate feedback resistance.

[0125] In some embodiments, the clamping arm 100 is in a pre-locked state when the resistance between the contact portion 440 and the actuating inclined surface 116 is less than a resistance threshold. The clamping arm 100 is in a locked state when the resistance between the contact portion 440 and the actuating inclined surface 116 is greater than or equal to the resistance threshold. In some embodiments, the resistance threshold ranges from 30N to 80N, and more specifically, from 40N to 60N. This resistance threshold range allows the operator to more easily perform the locking process.

[0126] In some embodiments, the clamping arm 100 includes a pre-locked state and a final locked state.

[0127] In the pre-locked state, the actuating ramp 116 of the locked part 130 abuts against the contact part 440 (e.g., locking protrusion 473) of the locking member 400, generating feedback resistance that prevents the clamping part 110 from moving from the distal end to the proximal end. This feedback resistance is fed back to the operator through the spindle 220, indicating to the operator that the clamping part 110 is about to enter the locked state. In some embodiments, after feeling the feedback resistance, the operator can reconfirm the clamping status of the clamping part 110 on the tissue. If the clamping part 110 does not clamp the tissue properly, the operator pushes the spindle 220 from the proximal end to the distal end, causing the clamping part 110 to change from the closed state to the open state, and re-clamping the tissue. If the clamping part 110 clamps the tissue properly, the operator pulls the spindle 220 from the distal end to the proximal end, causing the actuating ramp 116 to pass over the locking protrusion 473, and the locking protrusion 473 to enter the locking groove 115, and the clamping part 110 enters the final locked state. By setting the contact part 440 and the actuating inclined surface 116 to form feedback resistance, the operator can be prompted to confirm the tissue clamping status before locking, thus reducing surgical errors.

[0128] In the final locked state, the actuating ramp 116 passes over the contact portion 440, causing the locked portion 130 to engage with the stop structure 471, that is, the locking protrusion 473 engages with the locking groove 115, the guide pin 472 engages with the guide groove 114, and at least two clamping portions 110 are locked.

[0129] In some embodiments, the interlocking structure 112 is made of a metallic material such as stainless steel, which has advantages such as low cost and corrosion resistance. In other embodiments, the interlocking structure 112 may also be made of a non-metallic composite material such as medical plastic. The material selection of the interlocking structure 112 can ensure that the elastic modulus of the interlocking structure 112 meets a preset condition. The preset condition includes that when the force on the interlocking plate is greater than or equal to a resistance threshold, the interlocking plate undergoes elastic deformation along a first direction, causing the locking member 400 to pass over the actuating inclined surface 116 and enter the locking groove.

[0130] Figure 11A This is an exemplary structural diagram of the distal end of the sheath 210 according to some embodiments of this specification. Figure 11B It is based on Figure 11A Partial cross-sectional view of the distal end of the sheath 210 shown in some embodiments. Figure 11C It is based on Figure 11A Axial view of the distal end of the sheath 210 shown in some embodiments. Figure 12A This is an exemplary structural diagram showing the engagement of the locking member 400 with the sheath tube 210 according to some embodiments of this specification. Figure 12B It is based on Figure 12A A cross-sectional view of the locking member 400 after it is engaged with the sheath tube 210, as shown in some embodiments. Figure 12C It is based on Figure 12A An axial view of the locking member 400 after it is engaged with the sheath tube 210, as shown in some embodiments.

[0131] like Figure 9 , Figures 11A to 12C As shown, in some embodiments, the sheath 210 includes at least one abutment structure 211 for limiting the locking member 400 within the channel of the sheath 210.

[0132] In some embodiments, the sheath 210 includes a first abutment structure 211-1, and the locking member 400 includes a first mating portion 450. The first abutment structure 211-1 and the first mating portion 450 cooperate to restrict the movement and rotation of the locking member 400 relative to the sheath 210 from the distal end to the proximal end, so that the locking member 400 can be held in a desired position, such as the distal end of the sheath 210.

[0133] In some embodiments, the first abutment structure 211-1 includes a limiting step, and the first mating part 450 includes a limiting protrusion. The limiting step includes a U-shaped stepped surface with an opening facing the distal end, and the proximal end and sidewall of the limiting protrusion mate with the U-shaped stepped surface. The bottom wall of the U-shaped stepped surface restricts the movement of the locking member 400 relative to the sheath 210 from the distal end to the proximal end, and the sidewall of the U-shaped stepped surface restricts the rotational movement of the locking member 400 relative to the sheath 210. By providing the U-shaped stepped surface, the locking member 400 is prevented from wobbling within the sheath 210, thereby improving the locking accuracy between the interlocking structure 112 and the stop structure 471.

[0134] In some embodiments, the sheath 210 includes a first fitting 213 and a second fitting 214. The distal end of the first fitting 213 is located inside the second fitting 214, and the distal end of the first fitting 213 is provided with a first abutment structure 211-1. By providing the first fitting 213 and the second fitting 214 to cooperate, it is convenient to process the first abutment structure 211-1 at the distal end of the first fitting 213, and then assemble the distal end of the first fitting 213 into the second fitting 214, thereby simplifying the processing difficulty. In some embodiments, a portion of the distal end face of the first fitting 213 is recessed along the axial direction to form a U-shaped stepped surface, or a portion of the distal end face of the first fitting 213 has two axially protruding sides to form a U-shaped stepped surface.

[0135] In some embodiments, the limiting protrusion of the first mating portion 450 protrudes from the body 470 of the locking member 400, and the limiting protrusion is located at the proximal end of the locking member 400 so as to be able to adapt to the U-shaped stepped surface.

[0136] In some embodiments, the sheath 210 includes a second abutment structure 211-2, and the locking member 400 includes a second mating portion 460. The second abutment structure 211-2 and the second mating portion 460 are releasably connected to restrict the movement of the locking member 400 relative to the sheath 210 from the proximal end to the distal end. When the locking member 400 locks at least two clamping portions 110, the second abutment structure 211-2 separates from the second mating portion 460, and the locking member 400 is released from the sheath 210.

[0137] In some embodiments, the second blocking structure 211-2 includes at least one limiting spring piece, one end of which is connected to the inner wall of the sheath 210, and the other end protrudes radially inward from the inner wall of the sheath 210. The second mating part 460 includes at least one limiting surface facing the distal end, and the end of the limiting spring piece protruding from the inner wall of the sheath 210 is releasably connected to the limiting surface.

[0138] In some embodiments, the distal end of the limiting spring is connected to the inner wall of the sheath 210, and the proximal end protrudes radially inward from the inner wall of the sheath 210. The distal surface of the first mating part 450 forms a limiting surface (i.e., the second mating part 460), and the proximal end of the limiting spring is releasably connected to the limiting surface. In some embodiments, the proximal end of the main body 470 of the locking member 400 is provided with a plurality of (e.g., four) limiting protrusions spaced circumferentially. Correspondingly, the sheath 210 includes a plurality of (e.g., four) limiting springs spaced circumferentially, each limiting spring engaging with a limiting surface. By having multiple limiting springs engage with multiple limiting protrusions circumferentially in the sheath 210, the connection stability of the locking member 400 within the sheath 210 can be improved.

[0139] Combination Figure 7 As shown, in some embodiments, the clamping arm 100 includes an actuation part 135, which is configured to actuate the second blocking structure 211-2 and the second mating part 460 to release when moving from the distal end to the proximal end, thereby releasing the locking member 400 from the sheath 210. The actuation part 135 refers to a component or part that can directly or indirectly cause the second blocking structure 211-2 and the second mating part 460 to release. By providing the actuation part 135 to actuate the locking member 400 from the sheath 210, disturbances to the locking member 400 by other components or parts during movement can be avoided, reducing the risk of accidental release of the locking member 400.

[0140] In some embodiments, the blocking structure 211 includes a response portion 2111, which is configured to disengage the blocking structure 211 from the locking member 400 under preset conditions, thereby releasing the locking member 400 from the sheath 210. In some embodiments, the actuating portion 135 is configured to contact the response portion 2111 and cause the response portion 2111 to satisfy the preset conditions when moving from the distal end to the proximal end. In some embodiments, the preset conditions include, but are not limited to, the response portion 2111 being subjected to a force greater than a second preset force value along the radial direction of the sheath 210.

[0141] In some embodiments, the responsive part 2111 is disposed on the second abutment structure 211-2 and protrudes radially inward from the second abutment structure 211-2 along the sheath tube 210. Alternatively, in some embodiments, a portion of the second abutment structure 211-2 is configured as the responsive part 2111. In some embodiments, the proximal end of the limiting spring is configured as the responsive part 2111. When the clamping arm 100 moves from the distal end to the proximal end, the actuating part 135 can contact the responsive part 2111 and generate a force on the responsive part 2111 that is radially greater than the second preset force value along the sheath tube 210. The actuating part 135 drives the responsive part 2111 to deform the second abutment structure 211-2 radially outward along the sheath tube 210, and the second abutment structure 211-2 disengages from the limiting surface of the locking member 400, releasing the locking member 400 from the sheath tube 210.

[0142] In some embodiments, the actuating part 135 is provided on the locked part 130. For example, the actuating part 135 is provided on the interlocking structure 112 of the locked part 130, and at least a portion of the fixed end of the interlocking piece of the interlocking structure 112 constitutes the actuating part 135 to improve the strength of the actuating part 135.

[0143] In some embodiments, at least two clamping portions 110 further include a pre-release state, which is performed before, simultaneously with, or after the locking state. The pre-release state includes: the interlocking structure 112 and the extension 120 being connected, and the locking member 400 being released from the sheath 210. The interlocking structure 112 and the locking member 400 are located within the channel of the sheath 210. In some embodiments, the pre-release state is performed before the locking state. The locking member 400 is first released from the sheath 210, and then the locking member 400 locks with the clamping portion 110, so that the locking member 400 can be directly separated from the sheath 210 after locking with the clamping portion 110, improving operational safety and reducing clinical risks. In other embodiments, the pre-release state is performed simultaneously with or after the locking state, that is, the locking member 400 is first locked with the clamping portion 110, and then the locking member 400 is released from the sheath 210. In some embodiments, the order of the pre-release state and the locking state can be determined according to the setting position of the response unit 2111 on the second blocking structure 211-2. When the interlocking structure 112 approaches the locking member 400, after the response unit 2111 contacts the actuating unit 135, the stop structure 471 cooperates with the locked part 130, and the pre-release state is executed before the locking state.

[0144] Figures 13 to 18 This is a schematic diagram of the operation process according to some embodiments of this specification.

[0145] like Figure 13 As shown, the clamping arm 100 is in the open state. In some embodiments, the operating unit controls the mandrel 220 to move from the proximal end to the distal end, and the mandrel 220 drives the extension 120 and the clamping part 110 to move from the proximal end to the distal end, so that the distal end of the extension 120 extends out of the sheath 210 channel, at least two clamping parts 110 are far apart from each other and are in an open state, and a clamping space 20 for clamping tissue is formed between the at least two clamping parts 110.

[0146] like Figure 14 As shown, the clamping arm 100 is in a closed state. In some embodiments, the operating unit controls the mandrel 220 to move from the distal end to the proximal end, and the mandrel 220 drives the extension 120 and the clamping part 110 to move from the distal end to the proximal end, so that the distal end of the extension 120 is retracted into the channel of the sheath 210, and at least two clamping parts 110 are close to each other in a closed state, and the tissue is clamped between the at least two clamping parts 110.

[0147] like Figure 15A and Figure 15BAs shown, the clamping arm 100 is in a pre-locked state. The extension 120 drives the interlocking structure 112 of the clamping part 110 to approach the locking member 400. When the actuating inclined surface 116 of the interlocking structure 112 abuts against the contact part 440 of the locking member 400, a feedback resistance is generated to prevent the clamping part 110 from moving from the distal end to the proximal end. This feedback resistance is fed back to the operator through the spindle 220, prompting the operator that the clamping part 110 is about to enter the locked state.

[0148] like Figures 16A to 16C As shown, the clamping arm 100 enters the locked state from the pre-locked state, and the locking member 400 and the sheath 210 are released.

[0149] The process of the clamping arm 100 entering the locked state from the pre-locked state is as follows: The extension 120 drives the clamping part 110 to continue moving from the distal end to the proximal end. In the pre-locked state, the guide pin 472 of the stop structure 471 enters the guide groove 114 of the interlocking structure 112. The locking protrusion 473 of the stop structure 471 abuts against the actuating inclined surface 116, so that an interaction force is generated between the locking protrusion 473 and the actuating inclined surface 116. This interaction force can serve as feedback resistance to prompt the operator. When the interaction force increases to reach the resistance threshold, the interlocking structure 112 undergoes elastic deformation along the first direction, so that the locking protrusion 473 crosses the actuating inclined surface 116 and enters the locking groove. At least two clamping parts 110 are locked with the locking member 400.

[0150] The process of releasing the locking member 400 from the sheath tube 210 is as follows: When the clamping part 110 is in the pre-locked state, the extension part 120 drives the clamping part 110 to move from the distal end to the proximal end. The actuating part 135 of the interlocking structure 112 actuates the responding part 2111 of the second blocking structure 211-2, causing the second blocking structure 211-2 to deform radially outward relative to the sheath tube 210, thereby releasing the limiting surface of the second blocking structure 211-2 and the locking member 400 from the engagement, and releasing the locking member 400 from the sheath tube 210.

[0151] like Figure 17A and 17B As shown, the extension and clamping portions are released. In some embodiments, the extension 120 continues to move from the distal end to the proximal end, and the first abutting portion 480 of the locking member 400 abuts against the trigger portion 121, causing the trigger portion 121 to trigger the second connecting structure 122 of the extension 120 to break, deform, or displace, thus releasing it from the interlocking structure 112. At this time, the extension 120 and clamping portion 110 are released. Specifically, after the protrusion of the locking member 400 contacts the inclined surface of the proximal end of the elastic support arm of the extension 120, the force applied by the protrusion to the inclined surface can cause the two elastic support arms to deform and move closer to each other, causing the connecting recess 1221 on the elastic support arm to disengage from the connecting groove 113 of the interlocking structure 112, and the extension 120 and clamping portion 110 are released.

[0152] like Figure 18 As shown, the clamping part 110 and the locking member 400 are released together from the sheath 210. At least two clamping parts and the locking member remain locked, and the whole assembly is released from the sheath channel, remaining at the tissue wound site to assist in the closure of the tissue wound. Meanwhile, the sheath and other components such as the extension 120 are withdrawn from the body.

[0153] This specification provides an exemplary clamping device 10 according to Embodiment 2. The following description, in conjunction with... Figures 19 to 26B The clamp device 10 of Embodiment 2 will be described. In the following description, only the parts of the clamp device 10 of Embodiment 2 that differ from those of the clamp device 10 of Embodiment 1 will be described, and the rest of the parts not mentioned will refer to the exemplary embodiment of the clamp device 10 of Embodiment 1.

[0154] Figure 19 This is an exemplary structural diagram of the clamping part shown in some embodiments of this specification.

[0155] like Figure 19 As shown, compared to Embodiment 1, Embodiment 2 modifies the interlocking structure 112 of the clamping part 110. In some embodiments, the interlocking structure 112 includes two interlocking pieces bent into a C-shape. The C-shape includes a fixed end and a suspended end. The fixed end is connected to the side of the clamping part 110, and the opening of the C-shape is away from the central axis of the clamping part 110. The central axis of the clamping part 110 is as follows: Figure 20 As shown on the axis. In some embodiments, a connecting groove 113 is formed between the C-shaped structure and the clamping portion 110, the connecting groove 113 being used to engage with the extension portion 120. In some embodiments, the suspended end of the C-shaped structure constitutes a locking portion 130, the locking portion 130 being used to engage with the locking member 400.

[0156] Figure 20 This is an exemplary structural diagram of the clamping portion 110 and the extension portion 120 shown in some embodiments of this specification.

[0157] like Figure 6 , Figure 19 and Figure 20 As shown, in some embodiments, two interlocking plates are bent multiple times from both sides of the clamping portion 110 to form a C-shaped structure. A gap is formed between the C-shaped structure and the clamping portion 110, which constitutes a connecting groove 113. The connecting recess 1221 at the distal end of the extension portion 120 engages with the connecting groove 113, allowing the extension portion 120 and the connecting groove 113 to be releasably connected.

[0158] In some embodiments, the extension 120 includes a trigger portion 121; for example, the proximal end of the elastic arm has a bevel, which constitutes the trigger portion 121. In some embodiments, the sheath 210 includes a second abutment portion 212 (e.g., Figure 9As shown), the second abutment portion 212 is used to drive the trigger portion 121, causing the distal end of the extension portion 120 to break, deform, or displace and release from the clamping portion 110. For example, the second abutment portion 212 may be a portion of the distal end face of the first tube 213 of the sheath 210. When the trigger portion 121 contacts the second abutment portion 212, that is, when the distal end face of the first tube 213 contacts the inclined surface of the proximal end of the elastic support arm of the extension portion 120, the force applied to the inclined surface by the end face can deform the two elastic support arms and bring them closer together, causing the connecting recess 1221 on the elastic support arm to disengage from the connecting groove 113 of the interlocking structure 112, and the extension portion 120 to release from the clamping portion 110. More exemplary embodiments regarding the structure and release method of the extension portion can be found in [reference needed]. Figures 6 to 8 And its related descriptions.

[0159] Figure 21 This is an exemplary structural diagram of the locking member 400 shown according to some embodiments of this specification. Figure 22A This is an exemplary structural diagram showing the locking member 400 locking with the clamping part 110 according to some embodiments of this specification. Figure 22B This is a partial cross-sectional view showing the locking member 400 locked with the clamping part 110 according to some embodiments of this specification.

[0160] In some embodiments, the locking member 400 includes a first half 491 and a second half 492 connected to each other at their proximal ends. The surfaces of the first half 491 and the second half 492 facing each other are formed with second locking grooves 493. Each second locking groove 493 constitutes a stop structure 471 for engaging with the locked portions 130 of at least two clamping portions 110. In some embodiments, the locking member 400 includes a base 494, on which the first half 491 and the second half 492 are spaced apart. The space between the first half 491 and the second half 492 is configured to accommodate the locked portions 130 of at least two clamping portions 110, allowing the locked portions 130 to engage with the second locking grooves 493. In some embodiments, the second locking grooves 493 include, but are not limited to, countersunk grooves or through grooves.

[0161] In some embodiments, the surface of the base 494 facing the inner wall of the sheath 210 includes two planes 4941 and two curved surfaces 4942. The two planes are located on opposite sides of the base 494, and the two curved surfaces are located on the other opposite sides of the base 494. When the locking member 400 engages with the sheath 210, a gap is formed between the two planes and the sheath 210, which constitutes a passage for the extension 120 to pass through. The two curved surfaces fit against the inner wall of the sheath 210, thereby limiting the locking member 400 and preventing the locking member 400 from shaking.

[0162] In some embodiments, the suspended end of the interlocking piece constitutes a locked portion 130, and the distal surface of the locked portion 130 is perpendicular to a second direction, wherein the second direction may be an attached... Figure 19 The direction indicated by the middle arrow D2 can also be understood as the length direction of the clamping part 110. In this way, when the locking member 400 and the clamping part 110 tend to separate, the force between the distal surface of the locked part 130 and the second locking groove 493 is along the second direction, and the locked part 130 is configured to not deform under force along the second direction, so the locking member 400 and the clamping part 110 will not separate, thus improving the locking stability.

[0163] In some embodiments, when at least two clamping portions 110 engage with the locking member 400, at least a portion of the interlocking structure 112 of each clamping portion 110 is located between the first half 491 and the second half 492 of the locking member 400, and the locked portions 130 of the two interlocking plates of each interlocking structure 112 are respectively inserted into the second locking groove 493 of the first half 491 and the second locking groove 493 of the second half 492, so that at least two clamping portions 110 are locked with the locking member 400.

[0164] In some embodiments, the locked portion 130 is provided with an actuating ramp 116, which is arranged toward the proximal end of the clamping portion 110. The locking member 400 includes a contact portion 440, which engages with the actuating ramp 116 and guides the locked portion 130 into the second locking groove 493. In some embodiments, the distal ends of the first half 491 and the second half 492 form ramps, which are configured as contact portions 440. In some embodiments, after the contact portion 440 engages with the actuating ramp 116, it can actuate the two interlocking pieces to elastically deform along a first direction, causing the two locked portions 130 to move closer to each other and enter the gap between the first half 491 and the second half 492. When the actuating ramp 116 passes the contact portion 440, the two interlocking pieces return to their elastic deformation, and the locked portion 130 springs into the second locking groove 493 to form a limiting lock. More exemplary embodiments of the actuating ramp 116 and the contact portion 440 can be found in the relevant description in Embodiment 1.

[0165] Figure 23A This is an exemplary structural diagram of the distal end of the sheath 210 according to some embodiments of this specification. Figure 23B It is based on Figure 23A Partial cross-sectional view of the distal end of the sheath 210 shown in some embodiments. Figure 23C It is based on Figure 23A Axial view of the distal end of the sheath 210 shown in some embodiments. Figure 24A This is an exemplary structural diagram showing the engagement of the locking member 400 with the sheath tube 210 according to some embodiments of this specification. Figure 24B It is based on Figure 24AA cross-sectional view of the locking member 400 after it is engaged with the sheath tube 210, as shown in some embodiments. Figure 24C It is based on Figure 24A An axial view of the locking member 400 after it is engaged with the sheath tube 210, as shown in some embodiments.

[0166] like Figure 21 , Figures 23A to 24C As shown, in some embodiments, the sheath 210 includes at least one abutment structure 211 for limiting the locking member 400 within the channel of the sheath 210.

[0167] In some embodiments, the sheath 210 includes a first abutment structure 211-1, and the locking member 400 includes a first mating portion 450. The first abutment structure 211-1 engages with the first mating portion 450 to restrict the movement and rotation of the locking member 400 relative to the sheath 210 from the distal end to the proximal end, so that the locking member 400 can be held in a desired position, such as the distal end of the sheath 210. Exemplary embodiments of the first abutment structure can be found in the relevant description of Embodiment 1.

[0168] In some embodiments, the first half 491 and the second half 492 of the locking member 400 form radially protruding steps at their connections with the base 494, and these steps constitute the first mating portion 450. In some embodiments, the first abutting structure 211-1 includes a U-shaped stepped surface, and the steps of the first mating portion 450 can be adapted to the U-shaped stepped surface, thereby restricting the movement and rotation of the first mating portion 450 towards its proximal end.

[0169] In some embodiments, the sheath 210 includes a second abutment structure 211-2, and the locking member 400 includes a second mating portion 460. The second abutment structure 211-2 and the second mating portion 460 are releasably connected to restrict the movement of the locking member 400 relative to the sheath 210 from the proximal end to the distal end. When the locking member 400 locks at least two clamping portions 110, the second abutment structure 211-2 separates from the second mating portion 460, and the locking member 400 is released from the sheath 210.

[0170] In some embodiments, the second abutment structure 211-2 includes at least one limiting spring. The proximal end of the limiting spring is connected to the inner wall of the sheath 210, and the distal end protrudes radially inward from the inner wall of the sheath 210. The distal surfaces of the first half 491 and the second half 492 form a limiting surface (i.e., the second mating part 460), and the distal end of the limiting spring is releasably connected to the limiting surface. In some embodiments, the limiting spring is formed by cutting the sidewall of the sheath 210 and has a certain width in the circumferential direction to increase the contact area between the distal end of the limiting spring and the limiting surface of the locking member 400, thereby improving the stability of the locking member 400 within the sheath 210. In some embodiments, the second abutment structure 211-2 includes a first limiting spring and a second limiting spring. The first limiting spring is releasably connected to the distal surface of the first half 491, and the second limiting spring is releasably connected to the distal surface of the second half 492.

[0171] Combination Figure 19 As shown, in some embodiments, the clamping arm 100 includes an actuation part 135, which is configured to actuate the second blocking structure 211-2 and the second mating part 460 to release when moving from the distal end to the proximal end, thereby releasing the locking member 400 from the sheath 210. The actuation part 135 refers to a component or part that can directly or indirectly cause the second blocking structure 211-2 and the second mating part 460 to release. By providing the actuation part 135 to actuate the locking member 400 from the sheath 210, disturbances to the locking member 400 by other components or parts during movement can be avoided, reducing the risk of accidental release of the locking member 400.

[0172] In some embodiments, the blocking structure 211 includes a response portion 2111, which is configured to disengage the blocking structure 211 from the locking member 400 under preset conditions, thereby releasing the locking member 400 from the sheath 210. In some embodiments, the actuating portion 135 is configured to contact the response portion 2111 and cause the response portion 2111 to satisfy the preset conditions when moving from the distal end to the proximal end. In some embodiments, the preset conditions include, but are not limited to, the response portion 2111 being subjected to a force greater than a second preset force value along the radial direction of the sheath 210.

[0173] In some embodiments, the responsive part 2111 is disposed on the second abutment structure 211-2 and protrudes radially inward from the second abutment structure 211-2 along the sheath tube 210. In some embodiments, the responsive part 2111 is disposed on the second abutment structure 211-2 and protrudes radially inward from the second abutment structure 211-2 along the sheath tube 210. In some embodiments, each limiting spring has two toothed protrusions at its distal end, each toothed protrusion including a slope for engaging with the actuating part 135. When the actuating part 135 moves from the distal end to the proximal end and approaches the limiting spring, the actuating part 135 squeezes the slope of the toothed protrusion and generates a force greater than the second preset force value in the radial direction of the sheath tube 210 on the toothed protrusion, causing the distal end of the limiting spring to deform radially outward along the sheath tube 210, the second abutment structure 211-2 and the second engaging part 460 to disengage, and the locking member 400 and the sheath tube 210 to release. By setting tooth-shaped protrusions, the actuator 135 can more easily expand the limiting spring in the radial direction.

[0174] In some embodiments, the actuating part 135 is provided on the locked part 130. For example, the actuating part 135 is provided on the interlocking structure 112 of the locked part 130, and at least a portion of the fixed end of the interlocking piece of the interlocking structure 112 constitutes the actuating part 135 to improve the strength of the actuating part 135.

[0175] Figures 25A to 26B This is a schematic diagram illustrating the operation process according to some embodiments of this specification. Only the locked state, pre-release state, and the released state of the extension 120 and clamping part 110 are shown in the figure; other states can be referred to Embodiment 1. Figures 13 to 18 As shown.

[0176] like Figure 25A and 25B As shown, the clamping arm 100 is in a pre-locked state. The extension 120 drives the interlocking structure 112 of the clamping part 110 to approach the locking member 400. When the actuating inclined surface 116 of the interlocking structure 112 abuts against the contact part 440 of the locking member 400, a feedback resistance is generated to prevent the clamping part 110 from moving from the distal end to the proximal end. This feedback resistance is fed back to the operator through the spindle 220, prompting the operator that the clamping part 110 is about to enter the locked state.

[0177] like Figure 25C As shown, the clamping arm 100 enters the locked state from the pre-locked state, and the locking member 400 and the sheath 210 are released.

[0178] The process of the clamping arm 100 entering the locked state from the pre-locked state is as follows: The extension 120 drives the clamping part 110 to continue moving from the distal end to the proximal end. In the pre-locked state, the actuating inclined surface 116 abuts against the contact part 440. The force generated by the contact part 440 on the two interlocking plates causes the locked parts 130 to move closer to each other, and the locked parts 130 enter the gap between the first half 491 and the second half 492. After the actuating inclined surface 116 passes the contact part 440, the two interlocking plates return to their original shape, the locked parts 130 cooperate with the second locking groove 493, and the clamping part 110 is locked with the locking member 400.

[0179] The process of releasing the locking member 400 from the sheath tube 210 is as follows: When the clamping part 110 is in the pre-locked state, the extension part 120 drives the clamping part 110 to move from the distal end to the proximal end. The actuating part 135 of the interlocking structure 112 actuates the responding part 2111 of the second blocking structure 211-2, causing the second blocking structure 211-2 to deform radially outward relative to the sheath tube 210, thereby disengaging the second blocking structure 211-2 from the second mating part 460 of the locking member 400, and releasing the locking member 400 from the sheath tube 210.

[0180] like Figure 26A and 26B As shown, the extension and clamping parts are released. In some embodiments, the extension 120 continues to move from the distal end to the proximal end, and the second abutment portion 212 of the sheath 210 abuts against the trigger portion 121, causing the trigger portion 121 to trigger the second connecting structure 122 of the extension 120 to break, deform, or displace, thus releasing it from the interlocking structure 112. At this time, the extension 120 and clamping part 110 are released. Specifically, after the end face of the distal end of the first tube 213 contacts the inclined surface of the proximal end of the elastic support arm of the extension 120, the force applied to the end face on the inclined surface can cause the two elastic supports to deform and move closer to each other, causing the connecting recess 1221 on the elastic support arm to disengage from the connecting groove 113 of the interlocking structure 112, and the extension 120 and clamping part 110 are released. Then, the clamping part 110 and the locking member 400 are released together from the sheath 210. At least two clamping parts and locking elements remain locked, and the entire assembly is released from the sheath channel, remaining at the tissue wound to assist in wound closure. Meanwhile, the sheath and extension 120, along with other components, are withdrawn from the body.

[0181] This specification provides a control method for a clamping device 10 according to Embodiment 3. This method is applied to the clamping device 10 shown in any of the above embodiments.

[0182] Figure 27 This is an exemplary flowchart of a control method for a clamping device 10 according to some embodiments of this specification.

[0183] like Figure 27As shown, in some embodiments, the control method for the clamping device 10 includes process 2700. In some embodiments, process 2700 may be executed by an operating unit and includes the following steps:

[0184] Step 2710: Control at least two clamping parts 110 of the clamping arm 100 to open.

[0185] In some embodiments, the operating unit controls the mandrel 220 to move from the proximal end to the distal end, and the mandrel 220 drives the extension 120 and the clamping part 110 to move from the proximal end to the distal end, so that the distal end of the extension 120 extends out of the sheath 210 channel, at least two clamping parts 110 are far apart from each other and are in an open state, and a clamping space 20 for clamping tissue is formed between the at least two clamping parts 110.

[0186] Step 2720: Close at least two clamping parts 110 of the control arm 100.

[0187] In some embodiments, the operating unit controls the mandrel 220 to move from the distal end to the proximal end, and the mandrel 220 drives the extension 120 and the clamping part 110 to move from the distal end to the proximal end, so that the extension 120 is gradually retracted into the channel of the sheath 210, and at least two clamping parts 110 approach each other to form a closed state, and the tissue is clamped between the at least two clamping parts 110.

[0188] In some embodiments, at least a portion of the extension 120 is located within the sheath 210 channel, while the clamping portion 110 remains outside the sheath 210 channel to facilitate tissue clamping.

[0189] Step 2730: Control the clamping arm 100 to move from the distal end to the proximal end, and at least two clamping parts 110 cooperate with the locking member 400 to lock the at least two clamping parts 110; wherein, when the clamping arm 100 moves from the distal end to the proximal end, the at least two clamping parts 110 actuate the locking member 400 and the sheath 210 to release.

[0190] In some embodiments, before at least two clamping portions 110 are locked, the control method of the clamping device further includes a pre-locking step: the operating unit controls the clamping portion 110 to abut against the distal end of the locking member 400, causing the locking member 400 to generate feedback resistance against the clamping portion 110, thus pre-locking the clamping portion 110 and the locking member 400. For example, the actuating inclined surface 116 of the control interlocking structure 112 is controlled to abut against the contact portion 440 of the locking member 400, generating feedback resistance that prevents the clamping portion 110 from moving from the distal end to the proximal end. This feedback resistance is fed back to the operator through the spindle 220, indicating to the operator that the clamping portion 110 is about to enter the locked state.

[0191] In some embodiments, after feeling feedback resistance, the operator can reconfirm the clamping position of the clamping part 110 on the tissue. If the clamping part 110 does not clamp the tissue properly, the mandrel 220 is pushed from the proximal end to the distal end, causing the clamping part 110 to change from a closed state to an open state, thus re-clamping the tissue. If the clamping part 110 clamps the tissue properly, the mandrel 220 is pulled from the distal end to the proximal end, causing the actuating inclined surface 116 to pass over the locking protrusion 473, and the locking protrusion 473 to enter the locking groove 115, thus locking the clamping part 110 into its final locked state. By providing feedback resistance between the contact part 440 and the actuating inclined surface 116, the operator can be prompted to confirm the tissue clamping position before locking, reducing surgical errors.

[0192] In some embodiments, when the clamping portion 110 is in a pre-locked state, the operating unit controls the locking member 400 to release from the sheath 210. For example, the operating unit continues to control the extension portion 120 to move from the distal end to the proximal end, the extension portion 120 drives the clamping portion 110 to move from the distal end to the proximal end, the actuating portion 135 of the interlocking structure 112 actuates the responding portion 2111 of the second blocking structure 211, causing the second blocking structure 211 to deform radially outward relative to the sheath 210, thereby disengaging the second blocking structure 211 and the second mating portion 460 of the locking member 400, and releasing the locking member 400 from the sheath 210.

[0193] In some embodiments, after the locking member 400 is released from the sheath 210, the operating unit controls the clamping part 110 and the locking member 400 to lock the clamping part 110 and the locking member 400. For example, the operating unit controls the spindle 220 to move from the distal end to the proximal end, the spindle 220 drives the clamping part 110 to continue moving from the distal end to the proximal end, the extension part 120 drives the clamping part 110 to continue moving from the distal end to the proximal end, the actuating inclined surface 116 of the interlocking structure 112 abuts against the contact part and generates an interaction force, causing the interlocking structure 112 to elastically deform along the first direction, the stop structure of the locking member 400 and the locked part 130 of the interlocking structure 112 cooperate, so that the locking protrusion passes over the actuating inclined surface 116 and enters the locking groove, and at least two clamping parts 110 are locked with the locking member 400.

[0194] Step 2740: Control at least two clamping parts 110 to release from the sheath 210.

[0195] In some embodiments, the operating unit controls the extension to release from the clamping part, and then controls the extension to retract into the sheath, so that the clamping part and the locking member are released from the sheath together.

[0196] In some embodiments, the extension 120 continues to move from the distal end to the proximal end, and the first abutment portion 480 of the locking member 400 abuts against the trigger portion 121, causing the trigger portion 121 to trigger the second connecting structure 122 of the extension 120 to break, deform, or displace, thus releasing it from the interlocking structure 112. At this time, the extension 120 and the clamping portion 110 are released. The clamping portion 110 and the locking member 400 are released together from the sheath 210. At least two clamping portions and the locking member remain locked, and the whole assembly is released from the sheath channel, remaining at the tissue wound site to assist in the closure of the tissue wound. Meanwhile, the sheath and other components such as the extension 120 are withdrawn from the body.

[0197] The beneficial effects that the embodiments of this application may bring include, but are not limited to:

[0198] (1) By setting an interlocking structure that works in conjunction with both the extension and the locking element, the functions of connection and locking are integrated into the interlocking structure, making the overall structure more compact and the clamping part smaller. Furthermore, by placing the locking element inside the sheath channel, the size of the locking element is reduced, and the size of the locking element after it is engaged with the clamping part is also smaller. Compared with the traditional clamping part, the retention length of the locking element and the clamping part can be reduced by 30% to 70%. The small-sized locking element and clamping part are less likely to be disturbed by the environment in the confined space inside the body, thereby avoiding accidental separation of the clamping part due to external forces. In addition, the locking element is located inside the extension, which solves the problem of the limited opening angle of the extension. That is, the opening angle of the extension is not limited by the locking element, allowing the clamping part to obtain a larger clamping space.

[0199] (2) The locked part is configured so that it will not deform even when subjected to force in the second direction, so that the stop structure cannot be separated from the locked part, and the locking member and the clamping part remain in a cooperating state, which can improve the reliability and stability of the cooperation between the locking member and the clamping part, and enhance the ability of the clamping part and the locking member to resist external disturbances.

[0200] (3) By setting a response part, the locking part is released only when the preset conditions are met, avoiding accidental release and improving the safety of the clamping device.

[0201] (4) By setting a rotating section, the clamping arm can rotate around the sheath axis, which makes it easier to adjust the closing direction of at least two clamping parts to be consistent with the closing direction of the tissue wound, thereby improving the accuracy of clamping the tissue wound.

[0202] (5) By setting the contact part and the second stop structure to form feedback resistance, the operator can be prompted to confirm the tissue clamping status before locking, thus reducing surgical errors.

[0203] (6) By setting an actuating part to actuate the locking member to release it from the sheath, it is possible to avoid other parts or parts disturbing the locking member during the movement, thereby reducing the risk of accidental release of the locking member.

[0204] (7) By setting a trigger, the extension can only be released from the clamping part when triggered by the trigger, which can avoid accidental detachment of the extension and the clamping part due to the tension between them in the direction of movement, and reduce the surgical risk.

[0205] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0206] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0207] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0208] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although some embodiments that are currently considered useful have been discussed by way of various examples in the foregoing disclosure, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. Rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments described herein.

[0209] Similarly, it should be noted that, in order to simplify the descriptions disclosed herein and thus aid in the understanding of one or more embodiments, the foregoing description of embodiments in this specification sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0210] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A clamping device, characterized in that, include: Sheath, the sheath including a channel; A clamping arm, the clamping arm including at least two clamping portions and at least two extension portions, each clamping portion including an interlocking structure, the extension portion being releasably connected to the interlocking structure; A locking element, releasably disposed within the channel of the sheath and located between the at least two extensions, the locking element being used to cooperate with the interlocking structure to lock the at least two clamping portions.

2. The clamping device as described in claim 1, characterized in that, The sheath includes a mandrel, the proximal end of the extension is connected to the mandrel, and the distal end is releasably connected to the interlocking structure; The extension includes an extended state and a retracted state: In the extended state, the distal end of the extension extends out of the sheath channel, and a preset distance is maintained between the proximal end of the clamping part and the distal end of the sheath. In the retracted state, the extension is housed within the sheath channel, causing at least two clamping portions to close.

3. The clamping device as described in claim 1, characterized in that, The at least two clamping portions include an open state, a closed state, and a released state: In the open or closed state, the interlocking structure and the extension are connected, the interlocking structure is located outside the sheath channel, and the locking member is located inside the sheath channel; In the locked state, the interlocking structure is simultaneously connected to the extension and the locking member, and both the interlocking structure and the locking member are located within the sheath channel; In the released state, the interlocking structure is disconnected from the extension, and the interlocking structure and the locking member cooperate and are located outside the sheath channel.

4. The clamping device as described in claim 3, characterized in that, The at least two clamping portions also include a pre-release state, which is executed before, simultaneously with, or after the locking state. The pre-release state includes: the interlocking structure and the extension being connected, the locking member being released from the sheath, and the interlocking structure and the locking member being located within the sheath channel.

5. The clamping device as described in claim 1, characterized in that, When the extension engages with the interlocking structure, the extension drives the interlocking structure to move from the distal end to the proximal end until at least a portion of the interlocking structure engages with the locking member.

6. The clamping device as described in claim 1, characterized in that, The interlocking structure includes a first connecting structure and a locked portion, the extension includes a second connecting structure, the first connecting structure and the second connecting structure are releasably connected, and the locked portion is used to cooperate with the locking member.

7. The clamping device as described in claim 1, characterized in that, The distal end of the extension includes a trigger portion, which is configured to trigger the release of the extension from the clamping portion when subjected to a force in a first direction that is greater than a first preset force value; wherein the first direction is not parallel to the movement direction of the extension. The distal end of the sheath or the locking member includes an abutment portion for driving the trigger portion, causing the distal end of the extension to break, deform, or displace and release from the clamping portion.

8. The clamping device as described in claim 1, characterized in that, The sheath includes a first blocking structure, and the locking member includes a first mating portion. The first blocking structure engages with the first mating portion to restrict the movement and rotation of the locking member relative to the sheath from the distal end to the proximal end; and / or; The sheath includes a second abutment structure, and the locking member includes a second mating portion. The second abutment structure and the second mating portion are releasably connected to restrict the movement of the locking member relative to the sheath from the proximal end to the distal end.

9. The clamping device as described in claim 8, characterized in that, The sheath includes a first tube and a second tube, the distal end of the first tube is located inside the second tube, and the distal end of the first tube is provided with the first blocking structure.

10. A clamping device, characterized in that, include: Sheath, the sheath including a channel; A clamping arm, the clamping arm including at least two clamping parts, a clamping space being formed between the at least two clamping parts, and an interlocking structure being provided on the side of the clamping part facing the clamping space; A locking element, releasably disposed within the channel of the sheath, the locking element being used to cooperate with the interlocking structure to lock the at least two clamping portions; The locking member includes a stop structure, and the interlocking structure includes a locked part. The locked part is configured to be elastically deformed and locked to the stop structure when subjected to force in a first direction, and is configured to be restricted to deform when subjected to force in a second direction. The second direction is the relative movement direction between the stop structure and the locked part, and the first direction is not parallel to the second direction.

11. The clamping device as described in claim 10, characterized in that, The locking member includes a main body and stop structures respectively provided on both sides of the main body. The stop structure includes a guide pin and at least one locking protrusion. The guide pin is arranged along the second direction, and the locking protrusion protrudes from at least one side of the guide pin along the first direction. The distal and proximal surfaces of the locking protrusion are perpendicular to the second direction.

12. The clamping device as described in claim 11, characterized in that, The interlocking structure includes interlocking plates located on both sides of the clamping part. Each interlocking plate includes a fixed end connected to the side of the clamping part and a suspended end facing the central axis of the clamping part. A guide groove and a locking groove are formed between the two suspended ends. The guide groove is adapted to the guide pin, and the locking groove is adapted to the locking protrusion.

13. The clamping device as described in claim 11, characterized in that, The clamping part includes a fixing ring, which is located on the distal side of the interlocking structure. The locking member includes a limiting recess. When the clamping part and the locking member are locked, the fixing rings of the at least two clamping parts are engaged in the limiting recess.

14. The clamping device as described in claim 10, characterized in that, The locking member includes a first half and a second half connected to each other at their proximal ends. The surfaces of the first half and the second half facing each other are formed with locking grooves. Each locking groove constitutes the stop structure for cooperating with the locked portion of the at least two clamping portions.

15. The clamping device as described in claim 14, characterized in that, The interlocking structure includes two interlocking plates, which are bent into a C-shaped structure. The C-shaped structure includes a fixed end and a suspended end. The fixed end is connected to the side of the clamping part. The opening of the C-shaped structure is away from the central axis of the clamping part. The suspended end constitutes the locked part. The distal surface of the locked portion is perpendicular to the second direction.

16. The clamping device as described in claim 10, characterized in that, The locking element includes a contact portion located at the distal end, and the clamping arm includes a pre-locked state and a final locked state; In the pre-locked state, the locked part abuts against the contact part and generates feedback resistance that prevents the clamping part from moving from the distal end to the proximal end; In the final locked state, the locked part passes over the contact part, causing the locked part to engage with the stop structure, and the at least two clamping parts are locked.

17. A clamping device, characterized in that, include: Arm clamp; Locking element for locking the clamping arm; The sheath includes a stop structure for releasably limiting the locking member within the sheath channel. The stop structure includes a response portion configured to disengage the stop structure from the locking member under preset conditions, thereby releasing the locking member from the sheath.

18. The clamping device as described in claim 17, characterized in that, The preset conditions include: the response unit is subjected to a force along the radial direction of the sheath that is greater than a second preset force value; When the response part meets the preset condition, the blocking structure deforms outward along the radial direction of the sheath, and the blocking structure is released from the locking member.

19. The clamping device as claimed in claim 17, characterized in that, The sheath includes a first blocking structure, and the locking member includes a first mating portion. The first blocking structure engages with the first mating portion to restrict the movement and rotation of the locking member relative to the sheath from the distal end to the proximal end; and / or; The sheath includes a second abutment structure, and the locking member includes a second mating portion. The second abutment structure and the second mating portion are releasably connected to restrict the movement of the locking member relative to the sheath from the proximal end to the distal end.

20. The clamping device as described in claim 19, characterized in that, The first blocking structure includes a limiting step, the first mating part includes a limiting protrusion, the limiting step includes a U-shaped step surface with an opening facing the distal end, and the proximal end and sidewall of the limiting protrusion mate with the U-shaped step surface.

21. The clamping device as described in claim 19, characterized in that, The second blocking structure includes at least one limiting spring piece, one end of which is connected to the inner wall of the sheath tube, and the other end protrudes radially inward from the inner wall of the sheath tube. The second mating part includes at least one limiting surface facing the distal end, and the end of the limiting spring piece protruding from the inner wall of the sheath tube is releasably connected to the limiting surface.

22. The clamping device as described in claim 19, characterized in that, The response part is disposed on the second blocking structure and protrudes radially inward from the second blocking structure.

23. The clamping device as described in claim 17, characterized in that, The clamping arm includes an actuating part, which is configured to contact the responding part and cause the responding part to satisfy the preset condition when it moves from the distal end to the proximal end.

24. The clamping device as described in claim 23, characterized in that, The clamping arm includes at least two clamping portions, each clamping portion including an interlocking structure, the interlocking structure including two interlocking plates, the interlocking including a fixed end connected to the side of the clamping portion and a suspended end constituting the locked portion, at least a portion of the fixed end constituting the actuating portion.

25. The clamping device as described in claim 17, characterized in that, The clamping arm includes at least two clamping portions, which include an open state, a closed state, a locked state, and a released state. In the open state, the at least two clamping parts are far apart from each other and located outside the sheath channel, and the locking member cooperates with the blocking structure and is located inside the sheath channel; In the closed state, the at least two clamping parts are close to each other and in contact with the locking member, and the at least two clamping parts are located outside the sheath channel; In the locked state, at least a portion of the at least two clamping parts extends into the sheath channel, and the locking member locks with the clamping parts; In the released state, the clamping part and the locking member disengage from the blocking structure and are located outside the sheath channel.

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