Clip instrument for endoscope and clamping arm thereof

Abstract

Provided in the embodiments of the description are a clip instrument for an endoscope and a clamping arm thereof. The clip instrument comprises a sheath, a clamping arm and a locking member, wherein the sheath comprises a channel; the clamping arm comprises at least two clamping portions, which have a locked state; and the locking member is configured to limit relative displacement of the at least two clamping portions in the locked state, and after locking the at least two clamping portions, the locking member is released from the sheath together with the at least two clamping portions.

Description

A clamping device for endoscope and its clamping arm Cross-references

[0001] This application claims priority to Chinese patent application No. 202410264509.0 filed on March 7, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This specification relates to the field of medical devices, and in particular to a clamp device and a clamp arm thereof for an endoscope. Background Art

[0003] Endoscopic hemostatic clips are medical devices used to stop bleeding during endoscopic surgery. They are commonly used during surgeries on internal organs such as the gastrointestinal tract and esophagus to control bleeding and maintain a clear surgical field of view. These clips play a key role in endoscopic surgery, helping to reduce surgical complications and improve surgical safety and effectiveness. The design of endoscopic hemostatic clips must take into account the special requirements of endoscopic surgery, allowing surgeons to operate precisely within the confined surgical space. However, in actual clinical surgery, hemostatic clips carry risks such as damage to surrounding tissues and incorrect wound positioning. Summary of the Invention

[0004] One or more embodiments of the present specification provide a clamp arm of a clamp instrument for an endoscope, comprising at least two clamping parts, wherein the clamping part includes an operating arm and a clip, the operating arm includes at least one connecting structure, the clip includes at least one mating part releasably connected to the at least one connecting structure, the at least one connecting structure includes a groove arranged along a first direction, the at least one mating part includes a sliding part, the sliding part is movably mated with the groove, and the groove is configured to limit the relative movement of the clip and the operating arm in a direction perpendicular to the first direction.

[0005] In some embodiments, when the relative displacement between the groove and the sliding portion is greater than a distance threshold, the groove and the sliding portion are separated from each other and released from engagement, and the operating arm and the clip are released.

[0006] In some embodiments, both side edges of the operating arm are formed with curling edges facing the inside of the operating arm, and the channel is provided inside the curling edges.

[0007] In some embodiments, the sliding portion is formed by two side edges of the clip.

[0008] One or more embodiments of the present specification provide a clamp instrument for an endoscope, comprising: a clamp arm comprising at least two clamping parts, the clamping parts comprising an operating arm and a clip, the clip being releasably connected to the distal end of the operating arm; a driving member rotatably connected to the proximal end of the operating arm, the driving member being configured to: when the driving member moves from the proximal end to the distal end, drive the at least two clamping parts to open; when the driving member moves from the distal end to the proximal end, drive the at least two clamping parts to close and lock, and drive the operating arm and the clip to release.

[0009] In some embodiments, the operating arm includes a distal connection portion, the distal connection portion includes a first connection structure, the clip includes a first matching portion, and the first connection portion and the first matching portion cooperate to limit the relative movement of the clip and the operating arm in a first direction.

[0010] In some embodiments, the first connecting structure and the first matching portion are configured such that when the tension generated between the first connecting structure and the first matching portion is greater than a tension threshold, at least one of the first connecting structure and the first matching portion deforms, breaks, and releases the matching.

[0011] In some embodiments, the distal connection portion further includes a second connection structure, the clip includes a second mating portion, and the second connection portion and the second mating portion cooperate to limit the relative movement of the clip and the operating arm in a second direction, wherein the second direction is perpendicular to the first direction.

[0012] In some embodiments, the second connecting structure and the second matching portion are configured such that when the relative displacement between the second connecting structure and the second matching portion is greater than a distance threshold, the second connecting structure and the second matching portion are separated from each other and released from matching.

[0013] In some embodiments, the clamp instrument further includes a locking member, which is disposed between the at least two operating arms. The clip includes a locked portion, and when the locked portion cooperates with the locking member, the at least two clips are locked.

[0014] In some embodiments, the clamp instrument includes a sheath and a clamp seat located at the distal end of the sheath, the locking member is releasably connected to the clamp seat, and the clamping portion includes an actuating portion, which is configured to actuate the locking member to release the connection with the clamp seat when moving from the distal end to the proximal end.

[0015] In some embodiments, after the at least two clips are locked and the locking member is disconnected from the clamp seat, the driving member moves from the distal end to the proximal end, and the pulling force generated between the clip and the operating arm is greater than the pulling force threshold, or the relative displacement is greater than the distance threshold, the clip and the operating arm are released.

[0016] One or more embodiments of the present specification provide a clamp instrument for an endoscope, comprising: a clamp arm comprising at least two clamping parts, the proximal end of the clamping part comprising a cam structure; a driving member, the driving member being rotatably connected to the cam structure; a clamp seat, the driving member being axially movably arranged in the clamp seat, the clamp seat comprising at least one first positioning part, the first positioning part being configured such that when the driving member moves from the proximal end to the distal end relative to the clamp seat, the first positioning part slides in contact with the outer surface of the cam structure and drives the at least two clamping parts to open.

[0017] In some embodiments, a guide structure is provided between the driving member and the clamping seat, and the guide structure is used to limit the movement direction of the driving member relative to the clamping seat; the guide structure includes a guide groove and a slider, one of the driving member and the clamping seat includes the guide groove, and the other includes the slider, and the guide groove extends along the axial direction of the clamping seat.

[0018] In some embodiments, the clamping seat includes a hollow channel, the driving member is axially movably disposed in the hollow channel, and the difference between the transverse dimension of at least part of the hollow channel and the transverse dimension of the driving member is smaller than a preset threshold.

[0019] In some embodiments, the cam structure includes a first guide surface, a first positioning portion is provided at the distal end of the clamping seat and is located between the at least two clamping portions, and the first positioning portion is configured such that when the driving member moves from the proximal end to the distal end, the first positioning portion applies a first driving force to the first guide surface to open the at least two clamping portions.

[0020] In some embodiments, the clamp instrument includes a sheath and an outer sleeve fixed to the distal end of the sheath, the outer sleeve is arranged on the outside of the clamp seat, and a second position control portion is provided at the distal end of the outer sleeve, and the second position control portion is configured to control the opening angle of the at least two clamping portions to be less than or equal to a maximum preset angle.

[0021] In some embodiments, the cam structure includes a second guide surface, and the second position control portion is further configured such that when the driving member moves from the distal end to the proximal end, the second position control portion applies a second driving force to the second guide surface to close the at least two clamping portions.

[0022] In some embodiments, at least a portion of the distal end of the clamp seat extends from the distal end of the outer sleeve, and when the clamp arm is in an open state, the at least two clamping portions extend outside the outer sleeve, and when the clamp arm is in a closed state, at least a portion of the proximal ends of the at least two clamping portions are received in the outer sleeve.

[0023] In some embodiments, the proximal end of the clamping base is rotatably connected to the outer sleeve, and the clamping base is configured to rotate around the axis of the outer sleeve.

[0024] In some embodiments, the clamp instrument further includes a locking member, which is releasably disposed at the distal end of the clamp seat and located between the at least two clamping parts. The clamping part includes a locked part, and when the locked part cooperates with the locking member, the at least two clamping parts are locked.

[0025] In some embodiments, the side wall of the clamping seat includes at least two avoidance grooves, and the at least two avoidance grooves are used to avoid the clamping portion.

[0026] Through the clamp arm and clamp instrument in the above embodiment, the connection structure of the operating arm and the matching part of the clamp can be released, and only the clamp remains on the tissue after clamping the tissue. Compared with the traditional clamping part, the retention length of the clamp can be reduced by 30% to 70%, effectively improving the operating field of view of the operation and reducing the difficulty of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:

[0028] FIG1 is an exemplary structural diagram of a clip instrument according to some embodiments of the present specification;

[0029] FIG2 is an exemplary structural diagram of a clamp arm of an endoscope clamp instrument according to some embodiments of the present specification;

[0030] FIG3A is an exemplary structural diagram of a clamping portion according to some embodiments of the present specification;

[0031] FIG3B is an exemplary structural diagram of a clamping portion from another perspective according to some embodiments of this specification;

[0032] 3C is an exemplary cross-sectional view of the clamping portion according to some embodiments of FIG. 3B taken along section line AA;

[0033] FIG4 is an exemplary structural block diagram of a clip device according to some embodiments of the present specification;

[0034] FIG5 is an exemplary structural diagram of the cooperation between the clamp arm and the driving member according to some embodiments of this specification;

[0035] FIG6 is an exemplary structural diagram of an operating arm according to some embodiments of this specification;

[0036] FIG7 is a diagram illustrating an exemplary structure of a clip according to some embodiments of this specification;

[0037] FIG8 is an exemplary structural diagram of the distal end of a clip instrument according to some embodiments of the present specification;

[0038] FIG9A is an exemplary structural diagram of a locking member according to some embodiments of the present specification;

[0039] FIG9B is an exemplary partial cross-sectional view of a locking member according to some embodiments of the present specification;

[0040] FIG10 is an exemplary structural diagram of the locking member and the clamping seat according to some embodiments of this specification;

[0041] FIG11 is an exemplary structural block diagram of a clip device according to some embodiments of the present specification;

[0042] FIG12A is a front view of an exemplary structure of a clamping base according to some embodiments of the present specification;

[0043] FIG12B is an exemplary cross-sectional view of the clamp seat according to FIG12A taken along section line BB;

[0044] FIG13 is an exemplary structural diagram of a driving member according to some embodiments of this specification;

[0045] FIG14A is a front view of an exemplary structure of an outer sleeve according to some embodiments of the present specification;

[0046] FIG14B is an exemplary cross-sectional view of the outer sleeve according to FIG14A taken along section line CC;

[0047] FIG15 is an exemplary structural diagram of the distal end of a clip instrument according to some embodiments of the present specification;

[0048] FIG16A is an exemplary structural diagram of a clip instrument in an open state according to some embodiments of the present specification;

[0049] FIG16B is an exemplary cross-sectional view of the clip instrument according to FIG16A taken along section line DD;

[0050] FIG17A is an exemplary structural diagram of a clip device in a closed state according to some embodiments of the present specification;

[0051] FIG17B is an exemplary cross-sectional view of the clip instrument according to FIG17A taken along section line EE;

[0052] 18A is an exemplary structural diagram of a clip instrument in a pre-locking state according to some embodiments of the present specification;

[0053] FIG18B is an exemplary partial cross-sectional view of the clip instrument according to FIG18A taken along section line FF;

[0054] FIG19A is an exemplary structural diagram of a clip instrument in a locked state according to some embodiments of the present specification;

[0055] 19B is a partial cross-sectional view of a clip device in a locked state according to some embodiments of the present specification;

[0056] FIG19C is an exemplary structural diagram of a clip device in a locked state from another perspective according to some embodiments of the present specification;

[0057] FIG19D is a partial enlarged view of the clip apparatus shown in FIG19C;

[0058] FIG20A is an exemplary structural diagram of a clip instrument in a ready-to-release state according to some embodiments of the present specification;

[0059] FIG20B is an exemplary structural diagram of a clip instrument in a released state according to some embodiments of the present specification;

[0060] FIG20C is an exemplary structural diagram of a clip instrument in a released state from another perspective according to some embodiments of the present specification;

[0061] FIG. 21 is an exemplary flow chart of a method for controlling a clip instrument according to some embodiments of the present specification.

[0062] The accompanying drawings are:

[0063] 10. Clamp instrument; 20. Clamping space; 100. Clamping arm; 101. Clamping portion; 110. Operating arm; 111. Channel; 112. Distal connecting portion; 113. First connecting structure; 114. Second connecting structure; 115. Cam structure; 1151. First guide surface; 1152. Second guide surface; 120. Clip; 121. Sliding portion; 122. Clipping teeth; 123. First matching portion; 124. Second matching portion; 130. Locked portion; 131. Fixing portion; 132. Suspension structure; 133. First limiting structure; 134. Second limiting structure; 135. Actuating portion; 200. Delivery portion; 210. Sheath; 220. Mandrel; 300. Control portion; 310. Fixing Handle; 320, sliding handle; 400, locking member; 410, accommodating chamber; 411, distal opening; 412, side opening; 420, first stop structure; 430, second stop structure; 440, first limiting portion; 450, second limiting portion; 500, driving member; 510, rotating shaft; 511, sliding block; 520, push-pull rod; 530, joint; 600, clamping seat; 610, first resisting structure; 620, second resisting structure; 630, first positioning portion; 640, second positioning portion; 650, guiding structure; 651, guiding groove; 660, avoidance groove; 670, annular groove; 680, first tube structure; 690, second tube structure; 700, outer sleeve; 710, annular convex. DETAILED DESCRIPTION

[0064] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0065] It should be understood that the terms "system," "device," "unit," and / or "module" used herein are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, if other terms can achieve the same purpose, the terms may be replaced by other expressions.

[0066] As used in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not refer to the singular but also include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0067] Flowcharts are used throughout this specification to illustrate the operations performed by systems according to embodiments of this specification. It should be understood that preceding or following operations do not necessarily need to be performed in exact order. Instead, the steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0068] Clip instruments are common surgical instruments used in endoscopes. During surgery, they close tissue wounds to achieve hemostasis. Traditional clip instruments use a clamping element to close tissue, which is then locked with a locking element. The clamping element and the locking element are then released from the sheath and held in place at the wound.

[0069] Traditional clip instruments, due to their long clamping parts, can obstruct the view around the wound in a confined surgical space. This can lead to the operator's risk of damaging surrounding tissue and incorrect clamping due to poor visibility. This is especially true when multiple clamps need to be released during a single surgery, as the clamps and storage tubes can obstruct a large portion of the field of view, making the procedure more difficult.

[0070] In view of this, in some embodiments of the present specification, it is desired to provide a clamp instrument, the clamping part of which includes a releasably connected operating arm and a clamping piece, and only the clamping piece is released after clamping the tissue to reduce the size of the components retained in the body and reduce the field of view blocked by the clamping part, so that the operator can fully and clearly observe the surgical area, thereby avoiding the risks of damaging surrounding tissues, clamping errors, etc., and improving surgical safety.

[0071] FIG. 1 is an exemplary structural diagram of a clip instrument 10 according to some embodiments of the present disclosure.

[0072] As shown in FIG1 , in some embodiments, the clamp instrument 10 includes a clamp arm 100, a delivery portion 200, and a control portion 300. The control portion 300 is disposed at the proximal end of the delivery portion 200, and the clamp arm 100 is disposed at the distal end of the delivery portion 200. The “proximal end” and “distal end” referred to in the embodiments of this specification may indicate a direction, and refer to the side along the axial direction of the clamp instrument 10 (for example, the direction in which the sheath 210 of the delivery portion 200 extends within the endoscope channel), the side facing the operator is the “proximal end”, and the side facing the side extending into the human body for treatment is the “distal end”; “proximal end” and “distal end” may also refer to partial structures located in the corresponding directions, and should not be understood as indicating only the ends.

[0073] In some application scenarios, the delivery portion 200 has good passability. The delivery portion 200 and its distal clamping arm 100 pass through the working channel of the endoscope into the human body to approach the tissue to be clamped, where the tissue refers to the organ tissue of the human body or other organism. The control portion 300 is located outside the human body or other organism. The user controls the clamping arm 100 by manipulating the control portion 300 to perform a surgical operation. For example, the clamping arm 100 can clamp a tissue wound to keep it closed, thereby assisting wound healing.

[0074] In some embodiments, the delivery unit 200 includes a sheath 210 and a core shaft 220 (not shown in FIG1 ). The core shaft 220 is disposed within the channel of the sheath 210 and extends axially along the sheath 210. The proximal end of the core shaft 220 is connected to the control unit 300, and the distal end of the core shaft 220 is connected to the clamp arm 100. The terms "axial" and "radial" as used in the embodiments of this specification may refer to directions. The "radial" direction is perpendicular to the "axial" direction, or the axial direction is the direction in which the channel of the sheath 210 extends, while the radial direction is the direction perpendicular to the direction in which the channel of the sheath 210 extends.

[0075] In some embodiments, the sheath 210 can be flexible and can be bent in any direction. In some embodiments, the control unit 300 is composed 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 core shaft 220. The user controls the sliding handle 320 to move axially along the fixed handle 310 in vitro to control the axial movement of the core shaft 220 within the channel of the sheath 210, so that the clamp arm 100 completes the corresponding surgical operation, such as opening, closing, locking, and releasing.

[0076] Figure 2 is an exemplary structural diagram of a clamp arm of an endoscope clamp instrument according to some embodiments of the present specification. Figures 3A to 3C are exemplary structural diagrams of a clamping portion at different viewing angles according to some embodiments of the present specification.

[0077] As shown in Figures 2 to 3C , some embodiments of the present disclosure provide a clamp arm 100 for an endoscopic clip instrument. The clamp arm 100 includes at least two clamping portions 101 . The at least two clamping portions 101 clamp a tissue wound by opening and closing, thereby maintaining the wound closed. In some embodiments, the clamp arm 100 includes two or more clamping portions 101 , for example, three or four clamping portions 101 .

[0078] In some embodiments, the clamping portion 101 includes an operating arm 110 and a clip 120, the operating arm 110 includes at least one connecting structure, the clip 120 includes at least one mating portion, and the at least one connecting structure and the at least one mating portion are releasably connected. In the embodiments of this specification, "releasable connection" may refer to two components remaining in a connected state when a preset condition is met (for example, when the external force is less than a preset force value, or when the relative displacement is less than a preset displacement), and releasing and separating from each other when the preset condition is not met (for example, when the external force is greater than a preset force value, or when the relative displacement is greater than a preset displacement). The connecting structure of the operating arm 110 and the mating portion of the clip 120 are releasably connected, and only the clip 120 remains on the tissue after clamping the tissue. Compared with the traditional clamping portion 101, the retention length of the clip 120 can be reduced by 30% to 70%, effectively improving the operating field of view of the operation and reducing the difficulty of the operation.

[0079] In some embodiments, at least one connecting structure includes a groove 111 arranged along a first direction, and at least one mating portion includes a sliding portion 121 that movably engages with the groove 111. The groove 111 is configured to restrict relative movement of the clip 120 and the operating arm 110 in a direction perpendicular to the first direction. The "first direction" can refer to the direction indicated by arrow D1 in Figures 3A to 3C, or can be understood as the longitudinal direction of the clamping portion 101. The term "perpendicular to the first direction" can be understood as any direction within a plane perpendicular to the first direction, including but not limited to the directions indicated by arrows D2 and D3 in Figures 3A and 3C. Through the mating of the groove 111 and the sliding portion 121, the relative movement of the clip 120 and the operating arm 110 in a direction perpendicular to the first direction is restricted. This restriction ensures the positional stability of the clip 120 and the operating arm 110 in a specific direction, thereby improving the reliability and stability of the clamping portion 101.

[0080] In some embodiments, when the relative displacement between the groove 111 and the sliding portion 121 exceeds a distance threshold, the groove 111 and the sliding portion 121 separate from each other and release their engagement, releasing the operating arm 110 and the clip 120. The relative displacement between the groove 111 and the sliding portion 121 refers to the relative displacement between the two in their initial state, where the initial state refers to a state in which at least one connecting structure and at least one engaging portion remain engaged. The distance threshold refers to the distance between the distal end of the groove 111 and the proximal end of the sliding portion 121 in the initial state. Controlling the release of the groove 111 and the sliding portion 121 through relative displacement simplifies operation and reduces surgical difficulty.

[0081] In some embodiments, both sides of the operating arm 110 are formed with curled edges facing inwardly of the operating arm 110, and the channel 111 is disposed within the curled edges. The inward side of the operating arm 110 refers to the side of the operating arm 110 facing the clamping space 20. The clamping space 20 refers to the space between the at least two clamping portions 101 when the at least two clamping portions 101 are in the open state. Forming the channel 111 by curling the edges simplifies processing and reduces costs.

[0082] In some embodiments, the sliding portion 121 is formed by two sides of the clip 120. The two sides of the clip 120 are respectively inserted into the groove 111, so that the clip 120 is entirely constrained in the groove 111, and the clip 120 and the operating arm 110 are releasably connected.

[0083] FIG. 4 is a block diagram illustrating an exemplary structure of a clip instrument 10 according to some embodiments of the present disclosure.

[0084] As shown in FIG. 1 to FIG. 4 , some embodiments of the present disclosure provide a clip instrument 10 , which includes a clip arm 100 and a driving member 500 .

[0085] In some embodiments, the clamping arm 100 includes at least two clamping portions 101. In some embodiments, the proximal ends of the at least two clamping portions 101 are rotatably connected, and the distal ends are freely cantilevered, so that the clamping arm 100 includes an open state and a closed state. In the open state, the distal ends of the at least two clamping portions 101 are away from each other, and a clamping space 20 is formed between the at least two clamping portions 101. In the closed state, the distal ends of the at least two clamping portions 101 are close to or in contact with each other. In some embodiments, the distal end of the clamping portion 101 includes clamping teeth 122, which can provide additional gripping force, allowing the clamping portion 101 to clamp the tissue more firmly and prevent the tissue from sliding or shifting.

[0086] In some embodiments, the clamping portion 101 includes an operating arm 110 and a clip 120, and the clip 120 is releasably connected to the distal end of the operating arm 110. In some embodiments, the clip 120 is releasably connected to the operating arm 110 by various means, such as a latch connection, a snap connection, a hook connection, or a magnetic connection. In some embodiments, the clip 120 is located at the distal end of the operating arm 110. When the clamping portion 101 is opened, the distal and proximal ends of the clip 120 are separated from each other, thereby obtaining a larger clamping space 20. In some embodiments, after at least two clamping portions 101 clamp the tissue and lock it, the clip 120 is released from the operating arm 110, and the clip 120 is retained at the tissue wound. The operating arm 110 is withdrawn from the body along with other components such as the sheath 210. Compared to a traditional clamping portion 101, the retention length of the clip 120 can be reduced by 30% to 70%, effectively improving the surgical field of view and reducing the difficulty of the operation.

[0087] In some embodiments, the driver 500 is rotatably connected to the proximal end of the operating arm 110. The driver 500 is configured to: when the driver 500 moves from the proximal end to the distal end, drive the at least two clamping portions 101 to open; when the driver 500 moves from the distal end to the proximal end, drive the at least two clamping portions 101 to close and lock; and drive the operating arm 110 and the clip 120 to release, etc. For more exemplary embodiments of the driver 500 driving the clamping portions 101, please refer to the control process of Figures 16A to 20C. In some embodiments, the proximal end of the driver 500 is connected to the core shaft 220 (see Figure 8 for the core shaft 220). The control unit 300 controls the core shaft 220 to move axially along the sheath tube 210, thereby driving the driver 500 to move from the proximal end to the distal end or from the distal end to the proximal end. In some embodiments, the driver 500 is composed of the core shaft 220 itself. By controlling the rotation of the operating arms 110 through the driving member 500 , the rotation consistency and stability of at least two operating arms 110 can be improved.

[0088] FIG. 5 is an exemplary structural diagram of the cooperation between the clamp arm 100 and the driving member 500 according to some embodiments of the present disclosure.

[0089] As shown in FIG5 , in some embodiments, the proximal end of the operating arm 110 and the distal end of the driving member 500 are connected by a rotating shaft 510, the axis of which is perpendicular to the direction of motion D4 of the driving member 500. In some embodiments, the proximal end of the operating arm 110 includes a connecting hole, the rotating shaft 510 is fixed to the distal end of the driving member 500, and at least two connecting holes of the operating arm 110 are assembled on the rotating shaft 510, so that the clamping portion 101 can rotate relative to the driving member 500.

[0090] Fig. 6 is an exemplary structural diagram of an operating arm 110 according to some embodiments of the present specification. Fig. 7 is an exemplary structural diagram of a clip 120 according to some embodiments of the present specification.

[0091] As shown in Figures 6 and 7, the operating arm 110 includes a distal connection portion 112, which includes a first connection structure 113. The clip 120 includes a first mating portion 123. The first connection structure 113 and the first mating portion 123 cooperate to limit the relative movement of the clip 120 and the operating arm 110 in a first direction. The "first direction" can refer to the direction indicated by arrow D1 in Figures 6 and 7, or can be understood as the length direction of the clamping portion 101. In some embodiments, one of the first connection structure 113 and the first mating portion 123 includes a hook, and the other includes a slot. The hook includes an arm and a hook provided at the distal end of the arm. The proximal end of the arm is connected to the operating arm 110 or the clip 120, and the hook protrudes from the operating arm 110 or the clip 120 in the direction of the slot. The slot includes a depression or hole provided on the operating arm 110 or the clip 120. The hook portion of the hook extends into the slot to form a limit, so that the clip 120 and the operating arm 110 remain connected in the first direction.

[0092] In some embodiments, the first connecting structure 113 and the first mating portion 123 are configured such that when the tension generated between the first connecting structure 113 and the first mating portion 123 exceeds a tension threshold, at least one of the first connecting structure 113 and the first mating portion 123 deforms or breaks, thereby releasing the mating. The tension threshold can be determined based on historical tension values, which may include average tension values, maximum tension values, minimum tension values, and the like, obtained for different tissues and different clamping forces. These historical tension values ​​enable the mandrel 220 to achieve the required tension required to release the clip 120 from the operating arm 110 after pulling the clamping portion 101 to perform other surgical operations, such as opening, closing, and locking. In some embodiments, the arm portion of the hook is an elastic arm. When the tension generated between the hook and the slot exceeds the tension threshold, the arm portion of the hook deforms, causing the hook portion of the hook to disengage from the slot, thereby releasing the mating. In some embodiments, the arm of the hook is a rigid arm. When the tension generated between the hook and the slot exceeds a tension threshold, the hook and arm break, releasing the engagement between the hook arm and the slot. This tension controls the release of the first connecting structure 113 and the first engaging portion 123, simplifying the operation and reducing surgical difficulty.

[0093] In some embodiments, the distal connection portion 112 of the operating arm 110 further includes a second connection structure 114, and the clip 120 includes a second mating portion 124. The second connection structure 114 and the second mating portion 124 cooperate to limit the relative movement of the clip 120 and the operating arm 110 in a second direction, wherein the second direction is perpendicular to the first direction. The "second direction" can be understood as any direction within a plane perpendicular to the first direction, including but not limited to the directions indicated by arrows D2 and D3 in Figures 6 and 7. By limiting the relative movement of the operating arm 110 and the clip 120 in the first and second directions, the clip 120 is stably mounted on the operating arm 110 to prevent the two from separating due to disturbances in the surgical environment. In some embodiments, both sides of the operating arm 110 include grooves 111 arranged along the first direction, and both sides of the clip 120 include sliding portions 121. The sliding portions 121 are inserted into the grooves 111 along the first direction to connect the clip 120 to the operating arm 110.

[0094] In some embodiments, the second connecting structure 114 and the second mating portion 124 are configured such that when the relative displacement between the second connecting structure 114 and the second mating portion 124 exceeds a distance threshold, the second connecting structure 114 and the second mating portion 124 separate from each other and become disengaged. The distance threshold refers to the distance between the distal end of the second connecting structure 114 and the proximal end of the second mating portion 124 when the second connecting structure 114 and the second mating portion 124 are engaged. In some embodiments, when the clip 120 and the operating arm 110 undergo relative displacement, the sliding portion 121 of the clip 120 completely disengages from the groove 111 of the operating arm 110, and the clip 120 and the operating arm 110 are released. Controlling the release of the second connecting structure 114 and the second mating portion 124 through displacement simplifies operation and reduces surgical difficulty.

[0095] FIG8 is an exemplary structural diagram of the distal end of a clip instrument 10 according to some embodiments of the present disclosure.

[0096] As shown in Figures 7 and 8, in some embodiments, the clip instrument 10 further includes a locking member 400, which is disposed between the at least two operating arms 110. The clip 120 includes a locked portion 130. When the locked portion 130 cooperates with the locking member 400, the at least two clips 120 are locked. Because the locking member 400 is disposed between the at least two operating arms 110, when the at least two clips 120 are locked, the locking member 400 is located on the inner side of the at least two clips 120 (the side of the clip 120 facing the clamping space 20), and does not occupy the space outside the clip 120. This makes the clip 120 more compact and small when closed, thereby reducing the surgical field obstructed by the clip 120.

[0097] FIG9A is an exemplary structural diagram of a locking member 400 according to some embodiments of the present specification; FIG9B is an exemplary partial cross-sectional view of a locking member 400 according to some embodiments of the present specification.

[0098] As shown in Figures 7, 9A, and 9B, in some embodiments, the locking member 400 includes a receiving cavity 410 for accommodating the locked portions 130 of at least two clips 120, thereby maintaining the locked portions 130 of at least two clips 120 in a closed state. In some embodiments, the receiving cavity 410 is located at the distal end of the locking member 400 and has a distal opening 411. When the locked portion 130 moves from the distal end to the proximal end, it enters the receiving cavity 410 through the distal opening 411.

[0099] In some embodiments, the locked portion 130 is bent into an L-shaped structure by the side of the proximal end of the clip 120, so that the locked portion 130 includes a suspension structure 132 bent toward the inside (the side of the clip 120 facing the clamping space 20). The suspension structure 132 is located in the accommodating cavity 410 when the clamp arm 100 is locked. The accommodating cavity 410 of the locking member 400 is configured so that the suspension structures 132 of the locked portions 130 of at least two clips 120 can be maintained in a mutually fitted state, so that at least two clips 120 maintain a stable locked state.

[0100] In some embodiments, the locked portion 130 includes a first limiting structure 133, and the locking member 400 includes a first stop structure 420. The first limiting structure 133 cooperates with the first stop structure 420 to limit relative movement between the clip 120 and the locking member 400 in a second direction, which is perpendicular to the first direction. The "first direction" can refer to the direction indicated by arrow D1 in Figures 7 and 9A, and the "second direction" can be understood as any direction within a plane perpendicular to the first direction. The accommodating cavity 410 of the locking member 400 and the first stop structure 420 limit the relative movement of the at least two clips 120, preventing the at least two clips 120 from rotating relative to each other.

[0101] In some embodiments, the first limiting structure 133 includes a limiting pin, and the first stopping structure 420 includes a stopping groove, with the limiting pin configured to cooperate with the stopping groove. In some embodiments, the limiting pin protrudes from the proximal end of the suspension structure 132, and the stopping groove is recessed from the bottom wall of the proximal end of the accommodating cavity 410. After the limiting pin is inserted into the stopping groove, the stopping groove can limit the circumferential position of the limiting pin.

[0102] In some embodiments, the locked portion 130 includes a second limiting structure 134, and the locking member 400 includes a second stop structure 430. The second limiting structure 134 cooperates with the second stop structure 430 to limit relative movement between the clip 120 and the locking member 400 in a first direction, where the "first direction" can refer to the direction indicated by arrow D1 in Figures 7 and 9A. By limiting the relative movement between the clip 120 and the locking member 400 in the first direction, the clip 120 can be prevented from dislodging from the distal end of the locking member 400. The locking member 400 locks the clip 120 in multiple directions through multiple stop structures, thereby improving the stability of the clip 120 in clamping tissue.

[0103] In some embodiments, the second retaining structure 134 includes a locking spring, and the second stop structure 430 includes at least two locking recesses. The locking spring is configured to spring into the locking recesses when aligned with the locking recesses. In some embodiments, the proximal end of the locking spring is connected to the suspension structure 132, and the distal end protrudes from the suspension structure 132 toward the locking recesses. The locking recesses are provided on opposite side walls of the accommodating cavity 410. When the locking spring moves from the distal end to the proximal end, the distal end of the locking spring spring springs into the locking recesses to form a retaining position.

[0104] FIG. 10 is an exemplary structural diagram of the locking member 400 cooperating with the clamping seat 600 according to some embodiments of the present disclosure.

[0105] 8 , in some embodiments, the clip device 10 includes a sheath 210 and a clip seat 600 disposed at the distal end of the sheath 210. In some embodiments, the clip seat 600 is fixed within the sheath 210, or the clip seat 600 is rotatably disposed within the sheath 210 around its axis.

[0106] As shown in Figures 9A and 10 , in some embodiments, the locking member 400 is releasably connected to the clamping base 600. In some embodiments, the clamping base 600 includes a first retaining structure 610, and the locking member 400 includes a first limiting portion 440. The first retaining structure 610 cooperates with the first limiting portion 440 to limit the movement of the locking member 400 relative to the clamping base 600 from the distal end to the proximal end, thereby maintaining the locking member 400 in a desired position, such as the distal end of the clamping base 600.

[0107] In some embodiments, the first retaining structure 610 includes a radially inwardly projecting stop step. The proximal surface of the locking member 400 forms the first limiting portion 440, and the proximal surface abuts against the stop step. In some embodiments, the stop step includes, but is not limited to, at least two protrusions, a retaining rod arranged radially along the clamping base 600, and the like.

[0108] In some embodiments, the clamping base 600 includes a second retaining structure 620, and the locking member 400 includes a second limiting portion 450. The second retaining structure 620 and the second limiting portion 450 are releasably connected to each other to limit the movement of the locking member 400 from the proximal end to the distal end relative to the clamping base 600. After the locking member 400 locks at least two clamping portions 101, the second retaining structure 620 separates from the second limiting portion 450, and the locking member 400 is disconnected from the clamping base 600.

[0109] In some embodiments, the second retaining structure 620 includes a retaining spring, the distal end of which is connected to the side wall of the clamping base 600 and the proximal end of which protrudes radially inward from the inner surface of the clamping base 600. The locking member 400 includes a retaining surface facing the distal end, which is configured to engage with the retaining spring. In some embodiments, the retaining surface of the locking member 400 includes the bottom surface of the accommodating cavity 410, and the retaining spring is arranged corresponding to the side opening 412 of the accommodating cavity 410 of the locking member 400, so that the retaining spring can engage with the bottom surface of the accommodating cavity 410. In other embodiments, the retaining surface of the locking member 400 includes the surface at the distal end of the locking member 400.

[0110] As shown in Figures 7, 9A, and 10, in some embodiments, the clamping portion 101 includes an actuating portion 135. The actuating portion 135 is configured to actuate the locking member 400 to disconnect from the clamping base 600 when it moves from the distal end to the proximal end. For example, when the actuating portion 135 moves from the distal end to the proximal end and abuts the second retaining structure, it can actuate the second retaining structure 620 to disconnect from the second retaining portion 450, thereby disconnecting the locking member 400 from the clamping base 600. The actuating portion 135 refers to a component or portion that can directly or indirectly disconnect the second retaining structure 620 from the second retaining portion 450. By providing the actuating portion 135 to actuate the disconnection of the locking member 400 from the clamping base 600, disturbances of the locking member 400 caused by other components or portions during movement can be prevented, thereby reducing the risk of accidental release of the locking member 400.

[0111] In some embodiments, the actuator 135 is disposed on the locked portion 130 of the clip 120. For example, the two side wings of the locked portion 130 constitute the actuator 135. In some embodiments, as the locked portion 130 of the clip 120 enters the locking member 400, the actuator 135 moves from the distal end to the proximal end, pushing the limiting spring plate, causing the limiting spring plate to deform, displace, or break, thereby disconnecting from the limiting surface and disconnecting the locking member 400 from the clamping base 600.

[0112] In some embodiments, before, simultaneously with, or after the locked portion 130 and the locking member 400 are locked, the actuating portion 135 actuates the locking member 400 to release the connection with the clamping base 600 .

[0113] As shown in Figures 5 to 10, in some embodiments, after at least two clips 120 are locked and the locking member 400 is disconnected from the clamping base 600, the driver 500 moves from the distal end to the proximal end, releasing the clips 120 from the operating arm 110. In some embodiments, after the locked portions 130 of at least two clips 120 engage with the locking member 400, the locking member 400 can restrict further movement of the clips 120. At this time, the driver 500 continues to control the movement of the driver 500 from the distal end to the proximal end. When the driver 500 generates a tension greater than a tension threshold or a relative displacement greater than a distance threshold between the operating arm 110 and the clip 120, the connection structure of the operating arm 110 and the mating portion of the clip 120 are disconnected, releasing the operating arm 110 and the clip 120. At this point, the clip 120 and the locking member 400 remain within the body, while the operating arm 110, the driver 500, the clamping base 600, the sheath 210, and other components are withdrawn from the body.

[0114] FIG. 11 is a block diagram illustrating an exemplary structure of a clip instrument 10 according to some embodiments of the present disclosure.

[0115] As shown in FIG. 11 , some embodiments of the present specification further provide a clamp device 10 , which includes a clamp arm 100 , a driving member 500 , and a clamp seat 600 .

[0116] In some embodiments, the clamping arm 100 includes at least two clamping parts 101, and the proximal end of the clamping part 101 includes a cam structure 115. The cam structure 115 can change direction when subjected to an external force, causing the clamping part 101 to rotate.

[0117] In some embodiments, the driver 500 is rotatably connected to the cam structure 115. In some embodiments, the driver 500 moves along the axial direction of the sheath 210, and the cam structure 115 rotates relative to the driver 500 around the rotation axis 510, wherein the rotation axis 510 is perpendicular to the movement direction of the driver 500.

[0118] In some embodiments, the driver 500 is axially movable within the clamping base 600. In some embodiments, the clamping base 600 includes at least one first position-controlling portion 630. The first position-controlling portion 630 is configured such that, when the driver 500 moves from the proximal end to the distal end relative to the clamping base 600, the first position-controlling portion 630 slides in contact with the outer surface of the cam structure 115 and drives the at least two clamping portions 101 to open. The "position-controlling portion" referred to in the embodiments herein refers to a component capable of converting the linear motion of the driver 500 into rotation of the clamping portion 101.

[0119] According to the clamp instrument 10 in the above embodiment, the cam structure 115 of the clamping part 101 cooperates with the first position control part 630 of the clamping seat 600 to achieve the opening of at least two clamping parts 101, which can realize the effective and stable operation of the clamping part 101 under limited space conditions without occupying too much operating space, reducing the obstructed visual field during surgery, allowing the operator to fully and clearly observe the surgical area, and improving surgical safety. The driving force is transmitted by the cam structure 115, which can realize the original position conversion movement mode and reduce the length of the overall structure. The first position control part 630 is in sliding contact with the outer surface of the cam structure 115, which can simplify the cam structure 115 and facilitate processing and assembly.

[0120] Figure 12A is a front view of an exemplary structure of a clamping base 600 according to some embodiments of the present disclosure. Figure 12B is an exemplary cross-sectional view of the clamping base 600 taken along section line BB according to Figure 12A. Figure 13 is an exemplary structural diagram of a driving member 500 according to some embodiments of the present disclosure.

[0121] As shown in Figures 10 to 13, in some embodiments, a guide structure 650 is provided between the driving member 500 and the clamping seat 600. The guide structure 650 is used to limit the movement direction of the driving member 500 relative to the clamping seat 600, that is, the guide structure 650 is used to guide the driving member 500 to move axially along the clamping seat 600, and to limit the rotation of the driving member 500 relative to the clamping seat 600 around the axial axis, so as to improve the stability of the movement of the driving member 500.

[0122] In some embodiments, the guide structure 650 includes a guide groove 651 and a slider 511. One of the driver 500 and the clamping base 600 includes the guide groove 651, and the other includes the slider 511. The guide groove 651 extends axially along the clamping base 600. The slider 511 cooperates with the guide groove to allow the driver 500 to be axially slidably connected relative to the clamping base 600. In some embodiments, the driver 500 includes the slider 511. For example, the driver 500 includes a rotating shaft 510 connected to the clamping portion 101, and the two ends of the rotating shaft 510 are configured as sliders 511. The clamping base 600 includes a guide groove 651 formed in a side wall, and the guide groove 651 is arranged axially along the clamping base 600. In other embodiments, the clamping base 600 includes a slider, which can be a protrusion protruding from the inner wall of the clamping base 600, and the driver 500 includes a guide groove, and the guide groove extends axially along the driver 500.

[0123] In some embodiments, the driving member 500 includes a slider 511, which elastically contacts the inner wall of the clamping base 600, allowing the driving member 500 to move stably in the clamping base 600. Here, there is no need to provide a guide groove 651 on the clamping base 600, which helps save processing costs.

[0124] In some embodiments, the clamping base 600 includes a hollow channel, and the driving member 500 is axially movable in the hollow channel. In some embodiments, the difference between the lateral dimension of at least part of the hollow channel of the clamping base 600 and the lateral dimension of the driving member 500 is less than a preset threshold. Herein, the lateral dimension refers to the dimension perpendicular to the axial direction of the clamping base 600; at least part of the hollow channel refers to a part of the structure of the hollow channel or the entire hollow channel; the preset threshold includes but is not limited to the range of 0.01mm to 0.1mm. A small gap is maintained between the driving member 500 and the clamping base 600, which ensures the stability of the driving member 500 while reducing the friction resistance of the driving member 500 movement, thereby improving the operability of the driving member 500 and reducing the kinetic energy loss of the driving member 500.

[0125] In some other embodiments, the clamping seat 600 includes a hollow channel, and the driving member 500 can be axially movably arranged in the hollow channel. The cross-section of at least part of the hollow channel is adapted to the cross-section of the driving member 500, that is, the cross-section of the hollow channel and the cross-section of the driving member 500 are the same in shape and size, so as to limit the circumferential displacement of the driving member 500 and improve the stability of the axial movement of the driving member 500.

[0126] In some embodiments, the side wall of the clamping seat 600 includes at least two avoidance grooves 660, and the at least two avoidance grooves 660 are used to avoid the clamping portion 101. In this way, when the clamping portion 101 is in a closed state, at least part of the clamping portion 101 can be received in the clamping seat 600, making the structure more compact.

[0127] In some embodiments, the driver 500 is connected to the cam structure 115 via a rotating shaft 510, the axis of which is perpendicular to the direction of movement of the driver 500. In some embodiments, the driver 500 includes a push-pull rod 520 and a joint 530 fixed to the distal end of the push-pull rod 520. The rotating shaft 510 and the distal end of the joint 530 are integrally formed, thereby improving the stability of the connection between the driver 500 and the cam structure 115. The proximal end of the push-pull rod 520 is fixed to the core shaft 220, which can control the axial movement of the push-pull rod 520 along the clamping base 600.

[0128] Figure 14A is a front view of an exemplary structure of an outer sleeve 700 according to some embodiments of the present disclosure. Figure 14B is an exemplary cross-sectional view of the outer sleeve 700 taken along section line CC according to Figure 14A. Figure 15 is an exemplary structural diagram of the distal end of a clip instrument 10 according to some embodiments of the present disclosure.

[0129] As shown in FIG. 12A to FIG. 15 , in some embodiments, the clip instrument 10 includes a sheath 210 and an outer sleeve 700 fixed to the distal end of the sheath 210 . The outer sleeve 700 is sleeved on the outside of the clamp seat 600 and serves to protect the clamp seat 600 .

[0130] In some embodiments, the proximal end of the clamping base 600 is rotatably connected to the outer sleeve 700, and the clamping base 600 is configured to rotate about the axis of the outer sleeve 700. In some embodiments, when the core shaft 220 rotates about its own axis, it drives the driving member 500 to rotate about its own axis. The driving member 500 drives the clamping base 600 to rotate about the axis of the outer sleeve 700. The driving member 500 also drives the clamping portion 101 to rotate about the axis of the outer sleeve 700, so that the closing direction of the clamping portion 101 is consistent with the closing direction of the wound.

[0131] In some embodiments, one of the clamping base 600 and the outer sleeve 700 is formed with an annular groove 670, and the other is formed with an annular protrusion 710. The annular groove 670 and the annular protrusion 710 are slidably engaged, allowing the clamping base 600 to rotate relative to the outer sleeve 700. In some embodiments, the clamping base 600 includes a first tube structure 680 and a second tube structure 690. The inner diameter of the first tube structure 680 is equal to the outer diameter of the second tube structure 690. The proximal end of the second tube structure 690 has an annular rib 691 protruding from its outer surface. When the proximal end of the first tube structure 680 and the distal end of the second tube structure 690 are engaged, a gap is formed between the proximal end of the first tube structure 680 and the annular rib 691, and the gap constitutes the annular groove 670. The inner wall of the outer sleeve 700 is formed with an annular protrusion 710 that matches the annular groove 670. The provision of the first tube structure 680 and the second tube structure 690 facilitates the rotatable assembly of the clamping base 600 into the outer sleeve 700.

[0132] As shown in Figure 6, in some embodiments, the cam structure 115 includes a first guide surface 1151, and the first positioning portion 630 is provided at the distal end of the clamping seat 600 and is located between at least two clamping portions 101. The first positioning portion 630 is configured as follows: when the driving member 500 moves from the proximal end to the distal end, the first positioning portion 630 applies a first driving force to the first guide surface 1151 to open at least two clamping portions 101.

[0133] In some embodiments, the first guide surface 1151 is located on the inner side of the clamping portion 101 and is inclined relative to the first direction, wherein the inner side of the clamping portion 101 can be the side of the clamping portion 101 facing the clamping space 20. In some embodiments, the inclination direction of the first guide surface 1151 is configured such that the distal end of the first guide surface 1151 is close to the inner surface of the clamping portion 101, and the proximal end is away from the inner surface of the clamping portion 101, and the distance from each point from the distal end to the proximal end of the first guide surface 1151 to the rotation axis of the clamping portion 101 decreases successively. In some embodiments, the cam structure 115 includes at least two cams perpendicular to the inner surface of the clamping portion 101, the first guide surface 1151 is provided on the inner edge of the cam, and the proximal end of the cam is provided with a hole for connecting to the rotating shaft 510 of the driving member 500.

[0134] In some embodiments, the first positioning portion 630 includes a positioning rod, which is fixedly connected to the distal end of the clamping seat 600, and the axial direction of the positioning rod is parallel or substantially parallel to the rotational axis direction of the clamping portion 101, wherein substantially parallel can mean that the angle between the axial direction of the positioning rod and the rotational axis direction of the clamping portion 101 is less than 10°. During the movement of the driving member 500 from the proximal end to the distal end, the distal end of the first guide surface 1151 first abuts against the positioning rod, and the first driving force between the positioning rod and the first guide surface 1151 causes the first guide surface 1151 to slide relative to the positioning rod, driving the clamping portion 101 to deflect around the rotation axis 510. In some other embodiments, the proximal end surface of the locking member 400 is constructed as the first positioning portion.

[0135] In some embodiments, a second position control portion 640 is provided at the distal end of the outer sleeve 700. The second position control portion 640 is configured to control the opening angle of the at least two clamping portions 101 to be less than or equal to a maximum preset angle, thereby preventing the at least two clamping portions 101 from opening at too large an angle. In some embodiments, the maximum preset angle includes but is not limited to an angle between 90° and 160°. In some embodiments, the first position control portion 630 applies a first driving force to the cam structure 115, and the second position control portion 640 applies a second driving force to the cam structure 115. When the first driving force and the second driving force are equal and opposite, the angle at which the at least two clamping portions 101 are located is the maximum preset angle.

[0136] In some embodiments, the cam structure 115 includes a second guide surface 1152. The second position-controlling portion 640 is further configured such that, when the driving member 500 moves from the distal end to the proximal end, the second position-controlling portion 640 applies a second driving force to the second guide surface 1152, thereby closing the at least two clamping portions 101. In some embodiments, the second guide surface 1152 is parallel to the outer surface of the clamping portion 101, where the outer surface of the clamping portion 101 refers to the surface of the clamping portion 101 facing away from the clamping space 20. In some embodiments, the distal end surface of the outer sleeve 700 is configured as the second position-controlling portion 640.

[0137] In some embodiments, the clamping portion 101 deflects between the first position control portion 630 and the second position control portion 640 , which is conducive to the in-situ rotation of the clamping portion 101 and avoids the clamping portion 101 occupying too much operating space during the rotation process.

[0138] In some embodiments, at least a portion of the distal end of the clamping base 600 extends from the distal end of the outer sleeve 700 to avoid interference with the rotation of the clamping portion 101. When the clamping arm 100 is open, at least two clamping portions 101 extend outside the outer sleeve 700 to facilitate clamping tissue; when the clamping arm 100 is closed, at least a portion of the proximal end of the at least two clamping portions 101 is retracted within the outer sleeve 700 to protect the clamping portions 101.

[0139] In some embodiments, the clip device 10 further includes a locking member 400, which is releasably disposed at the distal end of the clip holder 600 and located between at least two clamping portions 101. The clamping portions 101 include locked portions 130. When the locked portions 130 engage with the locking member 400, the at least two clamping portions 101 are locked. For more detailed exemplary embodiments of the locking member 400, please refer to Figures 8 to 10 and the related descriptions.

[0140] 16A to 20C are diagrams illustrating exemplary operating procedures of the clip instrument 10 according to some embodiments of the present specification.

[0141] Figures 16A and 16B show the open state of the clamp instrument 10. In some embodiments, the control unit 300 controls the core shaft 220 to move from the proximal end to the distal end, and the core shaft 220 pushes the driving member 500 to move from the proximal end to the distal end. The driving member 500 applies a distal thrust to the clamping portion 101, and the first guide surface 1151 of the cam structure 115 abuts against the first position control portion 630. The first position control portion 630 applies a resistance perpendicular to the first guide surface 1151 to the clamping portion 101, causing the at least two clamping portions 101 to rotate, and the distal ends of the at least two clamping portions 101 move away from each other and open. After the at least two clamping portions 101 are opened, the clamping direction of the at least two clamping portions 101 can be adjusted to be consistent with the wound closure direction of the tissue by rotating the clamping seat 600 and the clamping portion 101.

[0142] Figures 17A and 17B illustrate the closed state of the clamp instrument 10. In some embodiments, the control unit 300 controls the core shaft 220 to move from the distal end to the proximal end, and the core shaft 220 pushes the driver 500 to move from the distal end to the proximal end. The driver 500 applies a proximal pulling force to the clamping portion 101, and the second guide surface 1152 of the cam structure 115 abuts against the second position control portion 640. The second position control portion 640 applies a resistance perpendicular to the second guide surface 1152 to the clamping portion 101, causing the at least two clamping portions 101 to rotate, and the distal ends of the at least two clamping portions 101 approach each other and close. After the at least two clamping portions 101 are closed, the tissue is clamped between the clamping portions 101 to achieve the purpose of hemostasis or assisting tissue healing.

[0143] Figures 18A and 18B illustrate the pre-locked state of the clip instrument 10. In some embodiments, the control unit 300 controls the mandrel 220 to move from the distal end to the proximal end, which in turn pushes the driver 500 to move from the distal end to the proximal end. The driver 500 pulls the clamping portion 101 from the distal end to the proximal end, causing the proximal end of the clamping portion 101 to enter the clamping seat 600. The clamping portion 101 includes an operating arm 110 and a clip 120. The operating arm 110 is retracted into the clamping seat 600, causing the locked portion 130 of the clip 120 to approach the locking member 400. When the locked portion 130 of the clamping portion 101 abuts the distal end of the locking member 400, the locking member 400 generates a feedback resistance to the clamping portion 101, preventing the clamping portion 101 from moving proximally. This feedback resistance is fed back to the operator or force detector via the mandrel 220, alerting the operator that the clamping portion 101 is about to enter the locked state. In some embodiments, after the operator feels the feedback resistance or the force detector detects the feedback resistance, the operator can reconfirm the clamping status of the clamping portion 101 on the tissue. If the clamping portion 101 does not clamp the tissue normally, the core shaft 220 is pushed from the proximal end to the distal end to turn the clamping portion 101 from the closed state to the open state to re-clamp the tissue. If the clamping portion 101 clamps the tissue normally, the core shaft 220 is pulled from the distal end to the proximal end to make the locked portion 130 pass over the distal end of the locking member 400 and enter the accommodating cavity 410 to cooperate with the locking recess, and the clamping portion 101 enters the final locked state. The feedback resistance formed by the locked portion 130 and the distal end of the locking member 400 can prompt the operator to confirm the tissue clamping status before locking, thereby reducing surgical errors.

[0144] Figures 19A, 19B, 19C, and 19D illustrate the locked state of the clip instrument 10. In some embodiments, the control unit 300 controls the core shaft 220 to move from the distal end to the proximal end, and the core shaft 220 pushes the driver 500 to move from the distal end to the proximal end. The driver 500 pulls the clamping portion 101 from the distal end to the proximal end, and the actuating portion 135 of the clamping portion 101 actuates the locking member 400 to disconnect from the clamping base 600. Simultaneously, the locked portion 130 of the clip 120 of the clamping portion 101 engages with the locking member 400.

[0145] In some embodiments, the actuating portion 135 of the clamping portion 101 enters the accommodating cavity 410 of the locking member 400. As the actuating portion 135 moves from the distal end to the proximal end, it pushes the second resisting structure 620, causing the second resisting structure 620 to deform, displace, or break, disconnecting from the stop surface, thereby disconnecting the locking member 400 from the clamping base 600. In some embodiments, the actuating portion 135 pushes the stop spring toward the outside of the locking member 400, causing the second resisting structure 620 of the clamping base 600 to separate from the second stop portion 450 of the locking member 400, thereby disconnecting the locking member 400 from the clamping base 600.

[0146] In some embodiments, the locked portion 130 of the clamping portion 101 enters the accommodating cavity 410 of the locking member 400, the first limiting structure 133 of the locked portion 130 cooperates with the first stop structure 420 of the locking member 400, and the second limiting structure 134 of the locked portion 130 cooperates with the second stop structure 430 of the locking member 400. At this time, the locked portion 130 is locked with the locking member 400, that is, the clip 120 is locked with the locking member 400.

[0147] 20A, 20B, and 20C illustrate the release state of the clip instrument 10. In some embodiments, the control unit 300 controls the core shaft 220 to move from the distal end to the proximal end, and the core shaft 220 pushes the driving member 500 to move from the distal end to the proximal end. The clamping portion 101 includes an operating arm 110 and a clip 120. The driving member 500 drives the operating arm 110 to move from the distal end to the proximal end. Since the clip 120 cooperates with the locking member 400, the locking member 400 prevents the clip 120 from moving from the distal end to the proximal end, so that a pulling force is generated between the operating arm 110 and the clip 120. When the pulling force generated between the first matching portion 123 of the clip 120 and the first connecting structure 113 of the operating arm 110 is greater than the pulling force threshold, at least one of the first connecting structure 113 and the first matching portion 123 is deformed or broken and the matching is released; at this time, the operating arm 110 moves from the distal end to the proximal end under the action of the driving member 500, and a relative displacement is generated between it and the clip 120. When the relative displacement between the second connecting structure 114 of the operating arm 110 and the second matching portion 124 of the clip 120 is greater than the distance threshold, the second connecting structure 114 and the second matching portion 124 are separated from each other and the matching is released, and the clip 120 is released from the operating arm 110. In some embodiments, the clip 120 and the locking member 400 remain in the body together, and the operating arm 110, the driving member 500, the clip seat 600, the sheath 210 and other components are withdrawn from the body.

[0148] Some embodiments of this specification also provide a method for controlling a clamp instrument 10 , which is applicable to the clamp instrument 10 shown in any of the above embodiments.

[0149] FIG. 21 is an exemplary flow chart of a method for controlling the clip instrument 10 according to some embodiments of the present specification.

[0150] As shown in FIG21 , in some embodiments, the control method of the clip instrument 10 includes a process 2100. In some embodiments, the process 2100 can be executed by the control unit 300 and includes the following steps:

[0151] In step 2110 , the control unit 300 controls the driving member 500 to move from the distal end to the proximal end, thereby driving at least two clamping parts 101 of the clamping arm 100 to open.

[0152] In some embodiments, the control unit 300 includes an automatic control handle or a manual control handle, which is used to control the axial movement of the core shaft 220 along the sheath tube 210 .

[0153] In some embodiments, the control unit 300 controls the core shaft 220 to move from the distal end to the proximal end, and the core shaft 220 drives the driving member 500 to move from the distal end to the proximal end. At least two clamping parts 101 rotate to move their distal ends away from each other, and at least two clamping parts 101 open.

[0154] In some embodiments, the driver 500 is controlled to move from the proximal end to the distal end, and the driver 500 drives the at least two clamping portions 101 to abut against the first position-controlling portion 630 of the clamping base 600; wherein the first position-controlling portion 630 is disposed at the distal end of the sheath 210 and is located between the at least two clamping portions 101. When the control unit 300 controls the driver 500 to continuously push the at least two clamping portions 101 toward the distal end, the first position-controlling portion 630 generates resistance to the at least two clamping portions 101, and this resistance provides a torque for the clamping portions 101 to rotate.

[0155] In some embodiments, the clamping portion 101 includes a cam structure 115, which includes a first guide surface 1151. When the control unit 300 controls the driving member 500 to continuously push the at least two clamping portions 101 toward the distal end, the first guide surfaces 1151 of the at least two clamping portions 101 can be controlled to slide relative to the first position control portion 630, thereby opening the at least two clamping portions 101.

[0156] In step 2120, the control unit 300 obtains the movement resistance of the driving member 500, and when the movement resistance is greater than the preset force value, controls the driving member 500 to stop moving; wherein, when at least two clamping parts 101 are opened to the maximum preset angle, the second position control part 640 at the distal end of the sheath 210 limits the rotation of at least two clamping parts 101, so that at least two clamping parts 101 generate movement resistance to the driving member 500.

[0157] In some embodiments, the distal end of the sheath 210 includes a second position-controlling portion 640. After the at least two clamping portions 101 are opened, the second position-controlling portion 640 abuts against the outer side surfaces of the at least two clamping portions 101. In some embodiments, the first position-controlling portion 630 applies a first driving force to the cam structure 115, and the second position-controlling portion 640 applies a second driving force to the cam structure 115. When the first driving force and the second driving force are equal and opposite, the rotational torque of the at least two clamping portions 101 is zero, and further opening is impossible at this opening angle. At this point, the at least two clamping portions 101 are opened to a maximum preset angle.

[0158] In some embodiments, since the second position control portion 640 restricts the rotation of at least two clamping portions 101 , the at least two clamping portions 101 generate motion resistance to the driving member 500 , and the motion resistance is fed back to the control portion 300 through the core shaft 220 .

[0159] In some embodiments, the control unit 300 includes a force detector for detecting the movement resistance of the core shaft 220. When the movement resistance is greater than a preset force value, the control unit 300 controls the core shaft 220 to stop moving, and the core shaft 220 controls the driving member 500 to stop moving.

[0160] By controlling at least two clamping parts 101 to stop opening when they reach a maximum preset angle, excessive opening of the clamping parts 101 can be avoided.

[0161] In step 2130 , the control unit 300 moves the clamping arm 100 to a preset target position so that the clamping spaces 20 of at least two clamping parts 101 are aligned with the clamping target.

[0162] In some embodiments, the clamping target refers to, for example, a tissue wound to be closed. In some embodiments, the preset target position refers to a position where the distance between the distal end of the clamping portion 101 and the clamping target is less than a specified distance and / or the clamping direction of the clamping portion 101 is aligned with the closing direction of the clamping target. In some embodiments, the control unit 300 moves the clamping arm 100 to within 3 mm of the tissue wound, aligning the clamping space 20 between the at least two clamping portions 101 with the tissue wound. The clamping direction of the at least two clamping portions 101 can be adjusted to align with the tissue wound closing direction by rotating the clamping base 600 and the clamping portion 101.

[0163] In step 2140 , the control unit 300 controls the driving member 500 to move from the distal end to the proximal end, driving at least two clamping parts 101 to close, lock, and release.

[0164] In some embodiments, the control unit 300 controls the driving member 500 to move from the distal end to the proximal end, driving at least two clamping parts 101 to close, so that the tissue wound is clamped in the clamping space 20; then the at least two clamping parts 101 are locked by the locking member 400; finally, the at least two clamping parts 101 are controlled to release from the sheath 210.

[0165] In some embodiments, the control unit 300 controls the at least two clamping parts 101 of the clamping arm 100 to close, including at least the following methods:

[0166] First, the control unit 300 controls the driver 500 to move from the distal end to the proximal end, causing the driver 500 to bring at least two clamping portions 101 into contact with the second positioning portion 640 of the clamping base 600. In some embodiments, the clamp device 10 includes an outer sleeve 700, with the second positioning portion 640 disposed at the distal end of the outer sleeve 700. In some embodiments, the outer sleeve 700 is fixed to the distal end of the sheath tube 210. In some embodiments, the second positioning portion 640 is disposed at the distal end of the sheath tube 210.

[0167] Next, the control unit 300 controls the second guide surfaces 1152 of at least two clamping portions 101 to slide relative to the second positioning portion 640, closing the at least two clamping portions 101. In some embodiments, the control unit 300 controls the driver 500 via the core shaft 220 to move from the distal end to the proximal end. The second positioning portion 640 then generates a torque on the second guide surface 1152 that rotates the clamping portions 101. The distal ends of the clamping portions 101 rotate toward each other, closing the at least two clamping portions 101. The second guide surface 1152 of the clamping portion 101 slides relative to the second positioning portion 640, causing the proximal end of the clamping portion 101 to be retracted into the clamping base 600 or the sheath 210.

[0168] In some embodiments, the control unit 300 controls the clip 120 and the sheath 210 to be released before, simultaneously with, or after the clip 120 and the locking member 400 are locked.

[0169] In some embodiments, the control unit 300 controls the clamp arm 100 to move from the distal end to the proximal end, driving the locked portion 130 of the clip 120 of the clamp arm 100 to engage with the locking member 400. In some embodiments, the locked portion 130 of the clamping portion 101 enters the accommodating cavity 410 of the locking member 400, the first limiting structure 133 of the locked portion 130 engages with the first stopping structure 420 of the locking member 400, and the second limiting structure 134 of the locked portion 130 engages with the second stopping structure 430 of the locking member 400. At this time, the locked portion 130 is locked with the locking member 400, that is, the clamp 120 is locked with the locking member 400.

[0170] In some embodiments, the actuator 135 of the clamping portion 101 is controlled to actuate the locking member 400, thereby disconnecting the locking member 400 from the sheath 210. In some embodiments, the actuator 135 of the clamping portion 101 enters the accommodating cavity 410 of the locking member 400. As the actuator 135 moves from the distal end to the proximal end, it pushes the limiting spring plate, causing the limiting spring plate to deform, displace, or break, disconnecting from the limiting surface, thereby disconnecting the locking member 400 from the clamping base 600. In some embodiments, the actuator 135 pushes the limiting spring plate toward the outside of the locking member 400, causing the second retaining structure 620 of the clamping base 600 to separate from the second limiting portion 450 of the locking member 400, thereby disconnecting the locking member 400 from the clamping base 600.

[0171] In some embodiments, at least two clamping parts 101 are released from the sheath tube 210. The method includes at least the following:

[0172] In some embodiments, the clamp arm 100 includes an operating arm 110 and a clip 120. The control unit 300 controls the clamp arm 100 to move from the distal end to the proximal end. Because the locking member prevents the clip 120 from further distal movement, a tensile force is generated between the operating arm 110 and the clip 120. In some embodiments, when the tensile force generated between the first connecting structure 113 of the operating arm 110 and the first mating portion 123 of the clip 120 exceeds a tensile force threshold, at least one of the first connecting structure 113 and the first mating portion 123 deforms, breaks, or shifts, thereby releasing the mating force.

[0173] In some embodiments, the control unit 300 controls the operating arm 110 to move from the distal end to the proximal end. Because the locking member prevents the clip 120 from further distal movement, a relative displacement occurs between the operating arm 110 and the clip 120. In some embodiments, when the relative displacement between the second connecting structure 114 of the operating arm 110 and the second mating portion 124 of the clip 120 exceeds a distance threshold, the second connecting structure 114 and the second mating portion 124 are disengaged.

[0174] The beneficial effects that may be brought about by the embodiments of the present application include but are not limited to:

[0175] (1) The connection structure of the operating arm and the mating part of the clamp can be released, and only the clamp remains on the tissue after clamping. Compared with the traditional clamping part, the retention length of the clamp can be reduced by 30% to 70%, effectively improving the operating field of view of the operation and reducing the difficulty of the operation.

[0176] (2) Through the cooperation of the groove and the sliding part, the relative movement of the clip and the operating arm in a direction perpendicular to the first direction is restricted. This restriction ensures the positional stability of the clip and the operating arm in a specific direction, thereby improving the reliability and stability of the clamping part.

[0177] (3) The release of the clip and operating arm is controlled by tension and / or displacement, which simplifies the operation and reduces the difficulty of surgery.

[0178] (4) The locking piece is located on the inner side of at least two clips and does not occupy the space outside the clips, making the structure more compact and small after the clips are closed, thereby reducing the surgical field of view blocked by the clips.

[0179] (5) The cam structure of the clamping part cooperates with the position control part of the clamping seat to realize the opening of at least two clamping parts, which can realize the effective and stable operation of the clamping part in the case of limited space, without occupying too much operating space, reducing the visual field obstructed during surgery, allowing the operator to fully and clearly observe the surgical area, and improving surgical safety. The driving force is transmitted by the cam structure, which can realize the original position conversion movement mode and reduce the length of the overall structure.

[0180] (6) A small gap is maintained between the driving member and the clamping seat, which ensures the stability of the driving member while reducing the friction resistance of the driving member movement, improving the operability of the driving member and reducing the kinetic energy loss of the driving member.

[0181] (7) Feedback resistance is formed between the locked part and the distal end of the locking member, which can prompt the operator to confirm the tissue clamping status before locking, thereby reducing surgical errors.

[0182] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other possible beneficial effects.

[0183] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.

[0184] This specification also uses specific terms to describe the embodiments of this specification. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different locations in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined.

[0185] Similarly, it should be noted that, in order to simplify the description of this specification and facilitate understanding of one or more embodiments, the foregoing description of the embodiments of this specification sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this specification requires more features than those recited in the claims. In fact, the features of an embodiment may be fewer than all the features of the individual embodiments disclosed above.

[0186] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required characteristics of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[0187] Finally, it should be understood that the embodiments described in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated in this specification.

Claims

1. A clamp arm for an endoscope, characterized in that: The invention comprises at least two clamping parts, wherein the clamping part comprises an operating arm and a clip, the operating arm comprises at least one connecting structure, the clip comprises at least one mating part releasably connected to the at least one connecting structure, the at least one connecting structure comprises a groove arranged along a first direction, the at least one mating part comprises a sliding part, the sliding part is movably mated with the groove, and the groove is configured to limit the relative movement of the clip and the operating arm in a direction perpendicular to the first direction.

2. The clamp arm according to claim 1, wherein: When the relative displacement between the groove and the sliding portion is greater than a distance threshold, the groove and the sliding portion are separated from each other and the fit is released, and the operating arm and the clip are released.

3. The clamp arm according to claim 1, wherein: Both sides of the operating arm are formed with curling edges facing the inner side of the operating arm, and the groove is arranged inside the curling edges.

4. The clamp arm according to claim 1, wherein: The sliding portion is formed by two side edges of the clip.

5. A clamping device for endoscope, characterized in that: include: A clamping arm comprising at least two clamping portions, wherein the clamping portion comprises an operating arm and a clamping piece, wherein the clamping piece is releasably connected to a distal end of the operating arm; A driving member is rotatably connected to the proximal end of the operating arm, and the driving member is configured to: when the driving member moves from the proximal end to the distal end, drive the at least two clamping parts to open; when the driving member moves from the distal end to the proximal end, drive the at least two clamping parts to close and lock, and drive the operating arm and the clip to release.

6. The clip device according to claim 5, wherein: The operating arm includes a distal connection portion, the distal connection portion includes a first connection structure, the clip includes a first matching portion, and the first connection portion and the first matching portion cooperate to limit the relative movement of the clip and the operating arm in a first direction.

7. The clip device according to claim 6, wherein: The first connection structure and the first matching portion are configured such that when the tension generated between the first connection structure and the first matching portion is greater than a tension threshold, at least one of the first connection structure and the first matching portion is deformed or broken to release the matching.

8. The clip device according to claim 6, wherein: The distal connection portion also includes a second connection structure, and the clip includes a second matching portion. The second connection portion and the second matching portion cooperate to limit the relative movement of the clip and the operating arm in a second direction, wherein the second direction is perpendicular to the first direction.

9. The clip device according to claim 8, wherein: The second connection structure and the second matching portion are configured such that when the relative displacement between the second connection structure and the second matching portion is greater than a distance threshold, the second connection structure and the second matching portion are separated from each other and released from matching.

10. The clip device according to claim 5, wherein: The clip device further includes a locking member, which is provided between the at least two operating arms. The clip includes a locked portion, and when the locked portion cooperates with the locking member, the at least two clips are locked.

11. The clip device according to claim 10, wherein: The clamp instrument includes a sheath and a clamp seat arranged at the distal end of the sheath, the locking member is releasably connected to the clamp seat, and the clamping part includes an actuating part, which is configured to actuate the locking member to release the connection with the clamp seat when moving from the distal end to the proximal end.

12. The clip device according to claim 11, wherein After the at least two clips are locked and the locking member is disconnected from the clamp seat, the driving member moves from the distal end to the proximal end. When the pulling force generated between the clip and the operating arm is greater than the pulling force threshold or the relative displacement is greater than the distance threshold, the clip and the operating arm are released.

13. A clamping device for endoscope, characterized in that: include: The clamping arm comprises at least two clamping parts, wherein the proximal ends of the clamping parts comprise a cam structure; a driving member rotatably connected to the cam structure; The clamping seat, the driving member is axially movably arranged in the clamping seat, and the clamping seat includes at least one first positioning portion, which is configured as follows: when the driving member moves from the proximal end to the distal end relative to the clamping seat, the first positioning portion slides in contact with the outer surface of the cam structure and drives the at least two clamping portions to open.

14. The clip device according to claim 13, wherein: A guide structure is provided between the driving member and the clamping seat, and the guide structure is used to limit the movement direction of the driving member relative to the clamping seat; The guide structure includes a guide groove and a slider. One of the driving member and the clamping seat includes the guide groove, and the other includes the slider. The guide groove extends along the axial direction of the clamping seat.

15. The clip device of claim 13, wherein: The clamping seat includes a hollow channel, the driving member is axially movably arranged in the hollow channel, and the difference between the transverse dimension of at least part of the hollow channel and the transverse dimension of the driving member is smaller than a preset threshold.

16. The clip device of claim 13, wherein: The cam structure includes a first guide surface, a first position control portion is arranged at the distal end of the clamping seat and is located between the at least two clamping portions, and the first position control portion is configured such that when the driving member moves from the proximal end to the distal end, the first position control portion applies a first driving force to the first guide surface to open the at least two clamping portions.

17. The clip device of claim 16, wherein: The clamp instrument includes a sheath and an outer sleeve fixed to the distal end of the sheath, the outer sleeve is sleeved on the outside of the clamp seat, and a second position control portion is provided at the distal end of the outer sleeve, and the second position control portion is configured to control the opening angle of the at least two clamping portions to be less than or equal to the maximum preset angle.

18. The clip device of claim 17, wherein: The cam structure includes a second guide surface, and the second position control portion is further configured so that when the driving member moves from the distal end to the proximal end, the second position control portion applies a second driving force to the second guide surface to close the at least two clamping portions.

19. The clip device of claim 17, wherein: At least a portion of the distal end of the clamp seat extends from the distal end of the outer sleeve. When the clamp arm is in an open state, the at least two clamping portions extend outside the outer sleeve. When the clamp arm is in a closed state, at least a portion of the proximal ends of the at least two clamping portions are received in the outer sleeve.

20. The clip device of claim 17, wherein: The proximal end of the clamping seat is rotatably connected to the outer sleeve, and the clamping seat is configured to rotate around the axis of the outer sleeve.

21. The clip device of claim 13, wherein: The clamp instrument further comprises a locking member, which is releasably provided at the distal end of the clamp seat and located between the at least two clamping parts. The clamping part comprises a locked part. When the locked part cooperates with the locking member, the at least two clamping parts are locked.

22. The clip device of claim 13, wherein: The side wall of the clamping seat includes at least two avoidance grooves, and the at least two avoidance grooves are used to avoid the clamping portion.

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