A clip device, an endoscope system, and an assembling method and an operating method thereof

Abstract

The embodiments of the present specification provide a clip instrument, an endoscope system, and an assembly method and an operation method thereof. The clip instrument comprises a clip arm, a receiving tube for receiving a proximal end of the clip arm, a sheath tube, a proximal end of the receiving tube is releasably connected to a distal end of the sheath tube, the receiving tube and the sheath tube can be directly actuated to release when the clip arm moves from the distal end to the proximal end, and / or the clip arm and the receiving tube can be directly actuated to lock.

Description

Technical Field

[0001] This manual relates to the field of medical devices, and in particular to a clamping instrument, an endoscope system, and its assembly and operation methods. Background Technology

[0002] Endoscopic clamp instruments are medical devices used in endoscopic surgery, primarily for hemostasis in cases of gastrointestinal bleeding, tumor resection, or other endoscopic procedures. Endoscopic clamp instruments typically consist of multiple delicate structures, requiring extremely high precision during assembly and operation to ensure the accurate and reliable coordination of each component. Therefore, existing endoscopic clamp instruments have relatively low assembly efficiency and low tolerance for errors during surgical procedures, preventing them from fully meeting the high standards required in clinical practice and thus affecting treatment outcomes. Summary of the Invention

[0003] This specification provides one or more embodiments of a clamping device, comprising: a receiving tube, the sidewall of which is formed with at least one elongated groove extending axially and a disassembly groove extending circumferentially; a clamping arm, comprising at least two clamping pieces, the proximal ends of the at least two clamping pieces being fixedly connected, and the proximal end of the clamping arm being axially movable within the receiving tube; the clamping arm further comprising a cantilever, one end of which is connected to the proximal end of the clamping pieces, and the other end extending along the central axis of the at least two clamping pieces; the proximal end of the cantilever comprising a mating portion, the mating portion being movably engaged with the elongated groove; the mating portion corresponding to the disassembly groove, and when the cantilever deforms or displaces radially inward, the clamping arm and the receiving tube are unlocked.

[0004] One or more embodiments of this specification also provide a clamping device, comprising: a receiving tube having at least one elongated groove extending axially on its sidewall; a clamping arm including at least two clamping pieces whose proximal ends are fixedly connected; the clamping arm further comprising a cantilever, one end of which is connected to the proximal end of the clamping pieces, and the other end extending along the central axis of the at least two clamping pieces; the proximal end of the cantilever including a mating portion having a tool contact surface configured such that, when subjected to a radially inward force, the proximal end of the cantilever deforms radially inward to allow entry into a channel of the receiving tube; and, after the cantilever returns to its free state, the mating portion movably engages with the elongated groove.

[0005] One or more embodiments of this specification also provide a clamping device, comprising: a mandrel; a connecting end, including a base section and an enlarged section, wherein the distal end of the enlarged section is connected to the proximal end of the base section, and the proximal end of the enlarged section is connected to the distal end of the mandrel, the diameter of the enlarged section being larger than the diameter of the base section; and a sheath, including a distal tube section and a proximal tube section, wherein the inner diameter of the distal tube section is larger than the inner diameter of the proximal tube section, the axial length of the distal tube section is greater than the axial length of the connecting end, and the connecting end is axially movable within the distal tube section.

[0006] One or more embodiments of this specification also provide an endoscope system including the clamping instruments as described in any of the above embodiments, and the endoscope system further includes an unlocking tool configured to unlock the clamping arm and the receiving tube.

[0007] This specification also provides a method for assembling a clamp device according to one or more embodiments. The assembly method is applied to the clamp device described in any of the above embodiments. The clamp device includes a receiving tube, a clamp arm, a sheath, and a mandrel. The proximal end of the clamp arm includes a cantilever, and the receiving tube includes a disassembly groove. The assembly method includes: placing the proximal end of the clamp arm at the distal end of the receiving tube; adjusting the central axis of the clamp arm to be quasi-parallel to the central axis of the receiving tube; radially inwardly pressing the cantilever and causing deformation, and controlling the relative movement of the clamp arm and the receiving tube in a direction of mutual approach, so that the proximal end of the clamp arm enters the receiving tube and forms an axial limiting fit; placing the proximal end of the receiving tube at the distal end of the sheath, controlling the relative movement of the receiving tube and the sheath in a direction of mutual approach, and forming an axial limiting fit after the receiving tube and the sheath are joined; controlling the mandrel to move distally and releasably connect to the proximal end of the clamp arm.

[0008] This specification also provides a method for operating a clamping instrument, which is applied to the clamping instrument described in any of the above embodiments and to the endoscope system described in the above embodiments; the clamping instrument includes a clamping arm, a receiving tube, a sheath, and a mandrel, wherein the receiving tube is releasably connected to the sheath, the proximal end of the clamping arm is axially movable within the receiving tube, and the mandrel is releasably connected to the clamping arm; the operating method includes: controlling the mandrel to move distally, driving the clamping arm to extend distally. The storage tube is in an open state; the mandrel is controlled to move proximally, driving the proximally end of the clamping arm to retract the storage tube and close; the mandrel is controlled to move proximally, driving the proximally end of the clamping arm to move, and triggering the storage tube to deform radially inward, causing the clamping arm to lock with the storage tube, and the storage tube to release from the sheath; after the clamping arm locks with the storage tube, the clamping arm and the storage tube form an axial limit, applying a pulling force towards the proximally end to the mandrel, causing the mandrel to release from the clamping arm.

[0009] One or more embodiments of this specification, by providing a tool contact surface, allow an external tool to engage with the mating part of the cantilever, facilitating operations (such as assembly or unlocking) on ​​the cantilever using an external tool. This solves the problems of assembly errors and low efficiency caused by manual operation, improving assembly accuracy and production efficiency. A disassembly groove is provided on the side wall of the storage tube to facilitate unlocking after the clamp arm is locked, allowing removal of the clamp arm and storage tube retained within the body, enhancing the fault tolerance of the clamping instrument. Attached Figure Description

[0010] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0011] Figure 1 These are exemplary structural diagrams of clamping devices shown in some embodiments of this specification;

[0012] Figure 2 This is a cross-sectional view of the distal assembly of the clamping device according to some embodiments of this specification;

[0013] Figure 3 This is a schematic diagram of the clamping arm structure according to some embodiments of this specification;

[0014] Figure 4 This is a schematic diagram of the inner tube structure according to some embodiments of this specification;

[0015] Figure 5 This is a schematic diagram of the outer tube structure according to some embodiments of this specification;

[0016] Figure 6 This is an assembly drawing of the inner and outer tubes according to some embodiments shown in this specification;

[0017] Figure 7 This is a schematic diagram of the structure of the release ring shown in some embodiments of this specification;

[0018] Figure 8 This is an assembly diagram of the distal assembly of a clamping device according to some embodiments of this specification, wherein the outer tube is shown in a cut-out structure;

[0019] Figure 9A This is a structural diagram of the receiving tube and sheath before assembly, according to some embodiments of this specification;

[0020] Figure 9B This is a schematic diagram of the structure of the housing tube and sheath tube after assembly, according to some embodiments of this specification;

[0021] Figure 9C It is based on Figure 9B A cross-sectional view of the clamping device shown in some embodiments, taken along section line AA;

[0022] Figure 10A This is a schematic diagram of the structure of the clamping arm and mandrel 220 before assembly, according to some embodiments of this specification;

[0023] Figure 10B It is based on Figure 10A A cross-sectional view of the clamping device shown in some embodiments along the section line BB;

[0024] Figure 10C This is a schematic diagram of the structure of the clamp arm and mandrel after assembly according to some embodiments of this specification;

[0025] Figure 10D It is based on Figure 10C A cross-sectional view of the clamping device shown in some embodiments along the section line CC;

[0026] Figure 11A This is a schematic diagram of the clamping arm in the closed state according to some embodiments of this specification;

[0027] Figure 11B It is based on Figure 11A A partial enlarged view of region D of the clamping device shown in some embodiments;

[0028] Figure 11C It is based on Figure 11A A cross-sectional view of the clamping device shown in some embodiments along the section line EE;

[0029] Figure 12A This is a schematic diagram illustrating the release of the receiving tube and sheath according to some embodiments of this specification;

[0030] Figure 12B It is based on Figure 12A A partially enlarged cross-sectional view of region F of the clamping device shown in some embodiments;

[0031] Figure 12C It is based on Figure 12A A cross-sectional view of the clamping device shown in some embodiments along section line GG;

[0032] Figure 13A This is a schematic diagram illustrating the locking of the clamping arm and the storage tube according to some embodiments of this specification;

[0033] Figure 13B It is based on Figure 13A A cross-sectional view of the clamping device shown in some embodiments along the section line HH;

[0034] Figure 14A This is a schematic diagram of the clamping arm and the storage tube before locking, according to some embodiments of this specification;

[0035] Figure 14B This is a schematic diagram showing the clamping arm and the storage tube locked together according to some embodiments of this specification;

[0036] Figure 15A This is a schematic diagram of the clamp arm and mandrel before release, according to some embodiments of this specification;

[0037] Figure 15B This is a schematic diagram showing the release of the clamping arm and mandrel according to some embodiments of this specification;

[0038] Figure 15C It is based on Figure 15B A cross-sectional view of the clamping device shown in some embodiments along section line II;

[0039] Figure 15D It is based on Figure 15C A cross-sectional view of the clamping device shown in some embodiments along section line JJ;

[0040] Figure 16A This is a schematic diagram of the clamping arm and the storage tube before disassembly, according to some embodiments of this specification;

[0041] Figure 16B This is a schematic diagram illustrating the disassembly of the clamping arm and the storage tube according to some embodiments of this specification;

[0042] Figure 16C This is a schematic diagram showing the disassembled clamping arm and storage tube according to some embodiments of this specification;

[0043] Figure 17This is a partially enlarged cross-sectional view of the distal assembly of the clamping device shown in some embodiments of this specification;

[0044] Figure 18 This is a schematic diagram of the clamping arm structure according to some embodiments of this specification;

[0045] Figure 19 This is a schematic diagram of the clamping arm according to some other variations of this specification;

[0046] Figure 20 This is a schematic diagram of the inner tube structure according to some embodiments of this specification;

[0047] Figure 21 This is a schematic diagram of the outer tube structure according to some embodiments of this specification;

[0048] Figure 22A This is a structural diagram of the clamping arm and the receiving tube before assembly, according to some embodiments of this specification;

[0049] Figure 22B This is a schematic diagram of the structure after the clamping arm and the receiving tube are assembled, according to some embodiments of this specification;

[0050] Figure 23 This is a schematic diagram of the structure after the clamping arm and the receiving tube are assembled, according to some embodiments of this specification;

[0051] Figure 24 This is an assembly drawing of the inner and outer tubes according to some embodiments shown in this specification;

[0052] Figure 25 This is a schematic diagram of the structure of the housing tube and sheath tube after assembly, according to some embodiments of this specification;

[0053] Figure 26A This is a schematic diagram of the structure of the clamping arm and mandrel before assembly, according to some embodiments of this specification;

[0054] Figure 26B This is a schematic diagram of the assembly of the clamping arm and the mandrel according to some embodiments of this specification;

[0055] Figure 27 This is a schematic diagram of the structure after the clamping arm and the receiving tube are assembled, according to some embodiments of this specification;

[0056] Figure 28A This is a schematic diagram of the assembly angle of the stop plate according to some embodiments of this specification;

[0057] Figure 28B This is a schematic diagram of the assembly angle of the stop plate according to some other variations of this specification;

[0058] Figure 29A This is a schematic diagram of the clamping arm in the closed state according to some embodiments of this specification;

[0059] Figure 29B It is based on Figure 29A A partial enlarged view of region K of the clamping device shown in some embodiments;

[0060] Figure 29C It is based on Figure 29A A cross-sectional view of the clamping device shown in some embodiments, taken along the section line MM;

[0061] Figure 30A This is a cross-sectional view showing the release of the receiving tube and sheath according to some embodiments of this specification;

[0062] Figure 30B This is a cross-sectional view of the receiving tube and sheath tube being released from another direction, according to some embodiments of this specification;

[0063] Figure 31A This is a schematic diagram illustrating the locking of the clamping arm and the storage tube according to some embodiments of this specification;

[0064] Figure 31B It is based on Figure 31A A cross-sectional view of the clamping device shown in some embodiments along the section line NN;

[0065] Figure 32A This is a schematic diagram of the clamping arm and the storage tube before locking, according to some embodiments of this specification;

[0066] Figure 32B This is a schematic diagram showing the clamping arm and the storage tube locked together according to some embodiments of this specification;

[0067] Figure 33A This is a schematic diagram of the stop arm before deformation, based on some embodiments of this specification;

[0068] Figure 33B This is a schematic diagram of the deformed stop arm according to some embodiments shown in this specification;

[0069] Figure 34A This is a schematic diagram of the clamp arm and mandrel before release, according to some embodiments of this specification;

[0070] Figure 34B It is based on Figure 34A A cross-sectional view of the clamping device shown in some embodiments along the section line PP;

[0071] Figure 34C This is a schematic diagram showing the release of the clamping arm and mandrel according to some embodiments of this specification;

[0072] Figure 35A This is a schematic diagram of the clamping arm and the storage tube before disassembly, according to some embodiments of this specification;

[0073] Figure 35B This is a schematic diagram illustrating the disassembly of the clamping arm and the storage tube according to some embodiments of this specification;

[0074] Figure 35C This is a schematic diagram showing the disassembled clamping arm and storage tube according to some embodiments of this specification;

[0075] Figure 36 These are schematic diagrams of the clamping device shown in other variations of this specification;

[0076] Figure 37 This is a schematic diagram illustrating the disassembly of the clamping arm and the storage tube according to other variations of this specification;

[0077] Figure 38 This is a schematic diagram illustrating the disassembly of the clamping arm and the storage tube according to some variations of this specification.

[0078] Figure 39 These are schematic diagrams of the mandrel and sheath shown in some embodiments of this specification;

[0079] Figure 40 These are schematic diagrams of the sheath structure shown in some embodiments of this specification;

[0080] Figure 41 This is a schematic diagram of the sheath structure according to other embodiments of this specification;

[0081] Figure 42 This is a schematic diagram of the sheath structure according to some embodiments of this specification;

[0082] Figure 43 This is a structural schematic diagram of the connection end shown in some embodiments of this specification;

[0083] Figure 44 This is a flowchart illustrating the assembly method of the clamping device according to some embodiments of this specification;

[0084] Figure 45 This is a flowchart illustrating the operation method of the clamping device according to some embodiments of this specification.

[0085] The attached figures are labeled as follows:

[0086] 10. Clamping device; 100. Clamping arm; 110. Mating part; 114. Stop protrusion; 115. Anti-slip structure; 120. Clamping piece; 121. Distal clamping part; 122. Bending part; 130. Cantilever; 132. Tool contact surface; 140. Connecting buckle; 141. Buckle piece; 142. First limiting structure; 143. Second limiting structure; 150. Fixing part; 160. Stopping part; 200. Conveying part; 210. Sheath tube; 211. Second connecting part; 212. Distal tube section; 213. Proximal tube section; 214. Connecting tube; 220. Mandrel; 221. Connecting end; 222. Guide head; 223. Limiting groove; 224. Base section; 225. Expanded diameter section; 226. Annular groove; 300. Operating part; 310. Fixed handle; 320. Sliding handle; 400, inner tube; 410, long groove; 411, assembly groove; 4111, guide slope; 412, sliding groove; 413, locking groove; 420, first connecting part; 430, trigger protrusion; 440, first limiting hole; 441, stop arm; 450, second limiting hole; 460, first positioning hole; 470, small diameter part; 500, outer tube; 510, clearance hole; 520, contact surface; 530, second positioning hole; 540, spring piece; 541, hook part; 542, extension part; 550, welding point; 560, stop piece; 561, center hole; 570, disassembly groove; 580, disassembly hole; 571, guide surface; 101, storage tube; 102, release ring; 103, contact surface; 600, external positioning shaft; 700, external unlocking tool. Detailed Implementation

[0087] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0088] It should be understood that the terms “system,” “instrument,” “component,” and / or “structure” used herein are one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0089] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0090] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0091] Endoscopic clamp instruments are common surgical instruments used in endoscopy. During surgery, these clamp instruments achieve hemostasis by clamping tissue wounds. Traditional clamp instruments still present several challenges: the assembly process is cumbersome and technically challenging, affecting production efficiency and yield; furthermore, because existing clamp instruments cannot be freely disassembled inside the body, incorrectly clamped hemostatic clips can only be left to fall off naturally, limiting the surgeon's operational flexibility and adversely affecting the patient's recovery. Therefore, simplifying the assembly process of clamp instruments, improving assembly accuracy and efficiency, and solving the problem of difficulty in adjusting or removing clamp instruments after use are key to enhancing the market competitiveness and clinical application effectiveness of clamp instruments. This is also one of the main problems that the clamp instruments provided in this manual aim to solve.

[0092] In some embodiments of this specification, a clamping device is provided. This clamping device improves assembly efficiency by providing tool contact surfaces on the clamping arms to allow for the insertion of tools for automated assembly. A disassembly groove is provided on the side wall of the storage tube to facilitate unlocking after the clamping arms are locked, allowing for the removal of the clamping arms and storage tube remaining inside the device, thus enhancing the fault tolerance of the clamping device.

[0093] Figure 1 This is an exemplary structural diagram of the clamp device 10 shown according to some embodiments of this specification.

[0094] like Figure 1As shown, in some embodiments, the clamp device 10 includes a clamping arm 100, a delivery section 200, and an operating section 300. The operating section 300 is located at the proximal end of the delivery section 200, and the clamping arm 100 is located at the distal end of the delivery section 200. The operating section 300 can control the clamping arm 100 to clamp the wound, thereby achieving hemostasis and wound closure. In the embodiments described in this specification, "proximal" and "distal" can refer to directions. Along the axial direction of the clamp device 10 (or the extension direction of the sheath 210 of the delivery section 200), the side facing the operator is "proximal," and the side facing the insertion into the body for treatment is "distal." "Proximal" and "distal" can also refer to portions of structures located in the corresponding directions and should not be construed as referring only to the ends.

[0095] In some embodiments, the delivery unit 200 includes a sheath 210 and a spindle 220 (see...). Figure 2 The mandrel 220 is disposed within the channel of the sheath 210 and extends axially along the sheath 210. The proximal end of the mandrel 220 is connected to the operating part 300, and the distal end of the mandrel 220 is connected to the clamping arm 100. In the embodiments described in this specification, "axial" and "radial" can refer to directions. The axial direction is the direction of the central axis of the corresponding component, and the radial direction is the direction perpendicular to the axial direction. For example, the axial direction of the sheath 210 is the direction in which the channel of the sheath 210 extends, and the radial direction of the sheath 210 is perpendicular to the direction in which the channel of the sheath 210 extends.

[0096] In some embodiments, the operating unit 300 consists of a fixed handle 310 and a sliding handle 320. The sliding handle 320 can slide axially relative to the fixed handle 310. The distal end of the sliding handle 320 is fixedly connected to the proximal end of the mandrel 220. The user controls the sliding handle 320 to move axially along the fixed handle 310 externally, thereby controlling the axial movement of the mandrel 220 within the sheath 210 channel, so that the clamp arm 100 can complete the corresponding surgical operation, such as opening, closing, locking, releasing, etc.

[0097] This specification provides several embodiments of a clamping device, aiming to solve many problems such as low assembly efficiency of the clamping device 10 and difficulty in adjusting or removing the clamping device after use. Without contradiction, certain features, structures, or characteristics of the various embodiments can be appropriately combined or referenced.

[0098] The clamp device 10 provided in Embodiment 1 of this specification will now be described in detail.

[0099] Figure 2 This is a cross-sectional view of the distal assembly of the clamping device 10 according to some embodiments of this specification. Figure 3 This is a schematic diagram of the structure of the clamp arm 100 according to some embodiments of this specification. Figure 4This is a structural schematic diagram of the inner tube 400 according to some embodiments of this specification. Figure 5 This is a structural schematic diagram of the outer tube 500 according to some embodiments of this specification.

[0100] like Figures 2 to 5 As shown, Embodiment 1 of this specification provides a clamping device 10, which includes a clamping arm 100 and a receiving tube 101.

[0101] In some embodiments, the clamping arm 100 includes at least two clamping tabs 120, the proximal ends of which are fixedly connected. For example, the proximal ends of the at least two clamping tabs 120 may be integrally formed and fixed, or they may be detachably fixed by a structure such as a connecting pin.

[0102] In some embodiments, the clamping arm 100 further includes a cantilever 130, one end of which is connected to the proximal end of the clamping piece 120, and the other end extends along the central axis of at least two clamping pieces 120; wherein the central axis of the at least two clamping pieces 120 may be the axis of symmetry or the geometric center line of the at least two clamping pieces 120. In some embodiments, the cantilever 130 is elastic, and when subjected to a radial force, the cantilever 130 is capable of undergoing a certain amount of elastic deformation in the radial direction.

[0103] In some embodiments, the proximal end of the cantilever 130 includes a mating portion 110, which has a tool contact surface 132. The tool contact surface 132 can be a surface area for contacting an external tool, capable of directly bearing and responding to external forces. By providing the tool contact surface 132, the external tool engages with the mating portion 110 of the cantilever 130, facilitating the use of an external tool to perform operations (such as assembly or unlocking) on ​​the cantilever 130. This solves the problems of assembly errors and inefficiency caused by manual operation, improving assembly accuracy and production efficiency.

[0104] In some embodiments, the sidewall of the receiving tube 101 is formed with at least one elongated groove 410 extending axially. For example, the distal end of the elongated groove 410 begins at a distance from the distal end of the receiving tube 101 and extends axially along the sidewall to terminate at the proximal edge of the receiving tube 101. For example, one elongated groove 410 is included. For example, at least two elongated grooves 410 are included, respectively spaced apart in the circumferential direction of the receiving tube 101; for example, two elongated grooves 410 spaced 180° apart in the circumferential direction are formed on the sidewall of the receiving tube 101.

[0105] In some embodiments, the tool contact surface 132 of the clamping arm 100 is configured such that, when subjected to a radially inward force, the proximal end of the cantilever 130 deforms radially inward to allow entry into the channel of the receiving tube 101; after the cantilever 130 returns to its free state, the mating part 110 movably engages with the elongated groove 410. The tool contact surface 132 is designed to allow the clamping arm 100 and the receiving tube 101 to be assembled using external assembly tools, such as by automatically assembling the clamping arm 100 and the receiving tube 101 on a tooling table, thereby improving assembly efficiency. After the clamping arm 100 and the receiving tube 101 are assembled, the elongated groove 410 ensures that the clamping arm 100 can only move along the axial direction of the receiving tube 101 and effectively limits the maximum stroke of the clamping arm 100 within the receiving tube 101, ensuring precise control of the position and direction of movement of the clamping arm 100 during operation.

[0106] In some embodiments, the sidewall of the receiving tube 101 is formed with a disassembly groove 570 extending in the circumferential direction. For example, the disassembly groove 570 may be a notch at the proximal edge of the receiving tube 101 for easy processing. In other embodiments, the disassembly groove 570 may be a slot spaced from the end of the receiving tube 101. In some embodiments, the disassembly groove 570 is used to receive an external unlocking tool 700, and the cantilever 130 deforms or displaces radially inward when subjected to the force of the external unlocking tool 700 (see...). Figure 16B For example, the external unlocking tool 700 includes, but is not limited to, snares, clamps, etc.

[0107] In some embodiments, the mating portion 110 of the cantilever 130 corresponds to the position of the disassembly groove 570, and when the cantilever 130 deforms or displaces radially inward, the clamping arm 100 and the receiving tube 101 are unlocked. By providing the disassembly groove 570, it is convenient to unlock the clamping arm 100 after it has been locked, so as to adjust or remove the clamping arm 100 and enhance the fault tolerance of the clamping device 10.

[0108] The structural details of the clamp device 10 provided in Embodiment 1 will be described below.

[0109] Figure 6 This is an assembly drawing of the inner tube 400 and the outer tube 500 according to some embodiments of this specification.

[0110] like Figures 4 to 6As shown, in some embodiments, the receiving tube 101 includes an inner tube 400, and the side wall of the inner tube 400 is provided with a first positioning hole 460, which includes, but is not limited to, a circular hole or a polygonal hole. In some embodiments, the receiving tube 101 also includes an outer tube 500, and the side wall of the outer tube 500 is provided with a second positioning hole 530. The first positioning hole 460 and the second positioning hole 530 have the same shape and size. In some embodiments, when the first positioning hole 460 and the second positioning hole 530 are connected to the external positioning shaft 600, the outer tube 500 is sleeved in a preset position of the inner tube 400 to improve the assembly accuracy of the outer tube 500 and the inner tube 400. The preset position includes the relative position of the inner tube 400 and the outer tube 500 in the axial and circumferential directions. These relative positions can be determined based on the correspondence between the structures on the inner tube 400 and the structures on the outer tube 500.

[0111] Figure 7 This is a schematic diagram of the structure of the release ring 102 shown in some embodiments of this specification. Figure 8 This is an assembly diagram of the distal assembly of the clamping device 10 according to some embodiments of this specification, wherein the outer tube 500 is shown in a cut-out structure.

[0112] like Figures 3 to 8 As shown, in some embodiments, a long groove 410 is provided on the side wall of the inner tube 400. The long groove 410 includes a sliding groove 412 and a locking groove 413. When the mating part 110 is engaged with the sliding groove 412, the clamping arm 100 switches between an open state and a closed state. When the mating part 110 is engaged with the locking groove 413, the clamping arm 100 is locked with the storage tube 101.

[0113] In some embodiments, a disassembly groove 570 is provided on the outer tube 500, and the disassembly groove 570 is arranged correspondingly to the locking groove 413. For example, the locking groove 413 is connected to the proximal end of the sliding groove 412, and the circumferential width of the locking groove 413 is greater than the circumferential width of the sliding groove 412. This design allows the locking groove 413 to be adapted to the disassembly groove 570 in both the axial and circumferential directions, ensuring that the external unlocking tool 700 has sufficient depth when the disassembly groove 570 is engaged. On the other hand, since the circumferential width of the locking groove 413 is greater than the circumferential width of the sliding groove 412, a step is formed at the connection between the two. This step can restrict the movement of the mating part 110 to the distal end after the circumferential width of the sliding groove 412 decreases.

[0114] like Figure 7 and Figure 8As shown, in some embodiments, the clamping device 10 further includes a release ring 102, which is axially movable and sleeved on the outside of the inner tube 400. When the release ring 102 moves to a preset position, it can apply a radially inward force to the sidewall of the inner tube 400. In some embodiments, the sidewall of the inner tube 400 is designed with an elongated groove 410, so that when the inner tube 400 is subjected to a radially inward force, at least a portion of the proximal region of the inner tube 400 can deform or displace radially inward.

[0115] In some embodiments, the outer wall of the inner tube 400 is provided with a trigger protrusion 430, which protrudes radially from the outer wall of the inner tube 400. When the release ring 102 moves to the position of the trigger protrusion 430, it can apply a radially inward force to the side wall of the inner tube 400. Figure 8 As shown, the release ring 102 includes an initial position. When the release ring 102 is in the initial position, it is located on the distal side of the trigger convex 430, and the inner tube 400 has a natural state, which means that it is not compressed.

[0116] In some embodiments, the proximal end of the inner tube 400 includes a small-diameter portion 470, the outer diameter of which is smaller than the rest of the inner tube 400. A release ring 102 is fitted onto the small-diameter portion 470, and the outer diameter of the release ring 102 is smaller than or equal to the outer diameter of the rest of the inner tube 400, so that the release ring 102 can be accommodated within the outer tube 500.

[0117] In some embodiments, the outer tube 500 and the inner tube 400 are fixedly connected by welding, bonding, or integral molding, and the outer tube 500 serves to protect the inner tube 400 and the release ring 102. For example, the outer tube 500 and the inner tube 400 are fixedly connected by a welding point 550 near the distal end.

[0118] Figure 9A This is a structural diagram of the receiving tube 101 and sheath tube 210 before assembly, according to some embodiments of this specification; Figure 9B This is a schematic diagram of the structure of the housing tube 101 and the sheath tube 210 after assembly, according to some embodiments of this specification; Figure 9C It is based on Figure 9B A cross-sectional view of the clamp device 10 along the section line AA, as shown in some embodiments.

[0119] like Figure 4 ,like Figures 9A to 9CAs shown, in some embodiments, the clamp device 10 further includes a sheath 210. A first connecting portion 420 is provided at the proximal end of the receiving tube 101, and a second connecting portion 211 is provided at the distal end of the sheath 210. When the first connecting portion 420 and the second connecting portion 211 approach each other axially, the second connecting portion 211 causes the first connecting portion 420 to displace radially inward. After the second connecting portion 211 passes the first connecting portion 420, the first connecting portion 420 returns to its initial position and forms an axial limit with the second connecting portion 211. Thus, during assembly, only the relative displacement between the receiving tube 101 and the sheath 210 needs to be changed, without the need for additional external assembly tools, making assembly simple and efficient.

[0120] In some embodiments, the first connecting portion 420 is configured as a connecting protrusion protruding from the outer wall of the receiving tube 101, and the second connecting portion 211 is configured as a limiting ring protruding from the inner wall of the sheath 210. When the receiving tube 101 and the sheath 210 are engaged, the connecting protrusion and the proximal end face of the limiting ring form a limiting position. In this design, the connecting protrusion can mate with the annular flange in any direction around the circumference, meaning that the receiving tube 101 and the sheath 210 do not need to identify the mating direction during assembly. For small-sized clamping devices 10, this greatly reduces the assembly difficulty of the receiving tube 101 and the sheath 210.

[0121] In some embodiments, a guide surface is formed at the proximal end of the connecting protrusion, which guides the limiting ring over the connecting protrusion. Specifically, the proximal end of the connecting protrusion is connected to the receiving tube 101, and the distal end protrudes from the sidewall of the receiving tube 101, such that the connecting protrusion includes an inclined surface that slopes from the proximal end to the distal end, which constitutes the aforementioned guide surface. The proximal end face of the limiting ring is parallel or substantially parallel to the radial direction. As the proximal end of the connecting protrusion and the limiting ring approach each other and gradually compress, the guide surface guides the limiting ring to slide to the distal end of the connecting protrusion. During this process, the inner tube 400 is gradually compressed and deformed radially inward. After the limiting ring passes the distal end of the connecting protrusion, the inner tube 400 returns to its natural state, and the distal end of the connecting protrusion and the proximal end face of the limiting ring form a limiting fit.

[0122] Figure 10A This is a schematic diagram of the structure of the clamping arm 100 and the spindle 220 before assembly, according to some embodiments of this specification; Figure 10B It is based on Figure 10A A cross-sectional view of the clamp device 10 along the section line BB, as shown in some embodiments. Figure 10C This is a schematic diagram of the structure of the clamping arm 100 and the spindle 220 after assembly according to some embodiments of this specification; Figure 10D It is based on Figure 10C A cross-sectional view of the clamp device 10 along the section line CC, as shown in some embodiments.

[0123] like Figure 3 , Figures 10A to 10DAs shown, in some embodiments, the clamping arm 100 further includes a connecting buckle 140, which is located at the proximal end of the clamping piece 120. The clamping device 10 also includes a spindle 220 and a connecting end 221 located at the distal end of the spindle 220. The connecting end 221 is releasably connected to the connecting buckle 140. In this specification, "releasable connection" means that the two components remain connected when a preset condition is met (e.g., when the two components form a limiting fit), and release from each other when the preset condition is not met (e.g., when the two components release the limiting fit). In some embodiments, the distal end of the connecting end 221 includes a guide head 222, which is a tapered structure with a smaller distal end and a larger proximal end, capable of guiding the connecting end 221 into the connecting buckle 140. In some embodiments, the connecting end 221 includes a limiting groove 223, which forms an axial limiting fit with the connecting buckle 140, connecting the connecting end 221 and the clamping arm 100.

[0124] In some embodiments, the clamping arm 100 includes a fixing portion 150, through which at least two clamping pieces 120 are fixed. For example, the fixing portion 150 is an annular structure and is integrally formed with the proximal end of the clamping pieces 120, thereby fixing the proximal ends of at least two clamping pieces 120.

[0125] In some embodiments, a hollow channel is formed in the middle of the fixing part 150, and the connecting buckle 140 is disposed within the hollow channel. For example, the hollow channel of the fixing part 150 can accommodate the guide head 222 of the connecting end 221. For example, the connecting buckle 140 can be disposed at any position at the far end, near end, or middle of the hollow channel.

[0126] In some embodiments, the connecting buckle 140 includes at least two buckle tabs 141. One side of each buckle tab 141 is fixed to the fixing part 150, and the other side extends radially inward. A through hole is formed between the at least two buckle tabs 141 to engage the connecting end 221. When the buckle tab 141 is deformed or displaced under force, it engages or disengages from the limiting groove 223 of the connecting end 221. For example, the guide head 222 of the connecting end 221 includes a bevel facing the distal end. When the connecting end 221 and the clamping arm 100 approach each other, the guide head 222 compresses the buckle tabs 141 to undergo elastic deformation, increasing the diameter of the through hole between the buckle tabs 141 to allow the guide head 222 to completely pass through the connecting buckle 140. Then, the buckle tabs 141 return to their original state and engage within the limiting groove 223, thus completing the connection between the connecting end 221 and the clamping arm 100. For example, the near end face of the guide head 222 is an inclined plane or a plane parallel to the radial direction. When the tension between the connecting end 221 and the clamping arm 100 reaches a certain value, the guide head 222 causes the fastener 141 to undergo plastic or elastic deformation, thereby disengaging the fastener 141 from the limiting groove 223 and releasing the connecting end 221 from the clamping arm 100.

[0127] like Figure 5 , Figure 10B and Figure 10D As shown, in some embodiments, a stop plate 560 is provided at the distal end of the receiving tube 101. The stop plate 560 is located between at least two clamping plates 120 and is used to limit the extreme position of the fixing part 150 of the clamping arm 100 to move distally. For example, there may be one or two stop plates 560. When one stop plate 560 is provided, at least one end of the stop plate 560 is fixed to the distal end of the receiving tube 101. When two stop plates 560 are provided, one end of the stop plate 560 is fixed to the receiving tube 101, and the other end is a suspended end. For example, when the clamping arm 100 moves to the extreme position distally, the connecting end 221 or the fixing part 150 abuts against the stop plate 560 to prevent the clamping arm 100 from extending excessively out of the receiving tube 101. In other embodiments, during the opening process of the clamping arm 100, the stop plate 560 also has the function of spreading the clamping plates 120.

[0128] In some embodiments, the angle between the stop plate 560 and the axis of the receiving tube 101 ranges from 50° to 90°. For example, the stop plate 560 is arranged parallel to the distal end face of the receiving tube 101, thus providing better limiting of the travel of the clamping arm 100. For example, the stop plate 560 is arranged at an angle relative to the distal end face of the receiving tube 101, the angle causing the stop plate 560 to protrude beyond the distal end of the receiving tube 101, thereby increasing the travel of the clamping arm 100 to the distal end. Because the travel of the clamping arm 100 to the distal end increases, the length of the clamping arm 100 extending beyond the receiving tube 101 increases, thereby increasing the span between at least two clamping plates 120.

[0129] In some embodiments, such as Figure 10D The stop plate 560 has a central hole 561. When the connecting end 221 contacts the stop plate 560, at least a portion of the guide head 222 extends out from the central hole 561. For example, the central hole 561 may be formed by the suspended ends of the two stop plates 560. By providing the central hole 561, the travel of the clamping arm 100 to the distal end can be increased, thereby increasing the span between at least two clamping plates 120.

[0130] In some embodiments, the ratio between the diameter of the central hole 561 and the maximum outer diameter of the guide head 222 of the connecting end 221 ranges from 0.67 to 1.11. For example, if the maximum outer diameter of the guide head 222 of the connecting end 221 is approximately 0.9 mm, then the diameter of the central hole 561 is greater than or equal to 0.6 mm to avoid the diameter being too small and affecting the span between the clips 120; and the diameter of the central hole 561 is less than or equal to 1 mm to ensure that the stop plate 560 has sufficient strength.

[0131] Figure 11AThis is a schematic diagram of the clamping arm 100 in the closed state according to some embodiments of this specification; Figure 11B It is based on Figure 11A A partial enlarged view of region D of the clamping device 10 shown in some embodiments; Figure 11C It is based on Figure 11A A cross-sectional view of the clamp device 10 along the section line EE, as shown in some embodiments.

[0132] like Figures 3 to 5 , Figures 11A to 11C As shown, in some embodiments, the clamping arm 100 includes a cantilever 130, with a mating portion 110 at its proximal end. The receiving tube 101 includes an elongated groove 410 disposed on the side wall of the inner tube 400. The elongated groove 410 includes a sliding groove 412 and a locking groove 413. When the mating portion 110 engages with the sliding groove 412, the clamping arm 100 switches between an open state and a closed state. When the mating portion 110 engages with the locking groove 413, the clamping arm 100 is locked to the receiving tube 101. For example, when the spindle 220 controls the clamping arm 100 to move distally, the clamping piece 120 extends beyond the distal end of the receiving tube 101 in an open state. When the spindle 220 controls the clamping arm 100 to move proximally, the clamping piece 120 retracts into the proximal end of the receiving tube 101 in a closed state.

[0133] In some embodiments, the inner tube 400 and the outer tube 500 are fixedly connected. The outer wall of the inner tube 400 is provided with a trigger protrusion 430 and a release ring 102. In the initial position, the release ring 102 is located on the distal side of the trigger protrusion 430, and the trigger protrusion 430 provides resistance to the proximal movement of the release ring 102. For the specific arrangement of the inner tube 400, outer tube 500, and release ring 102, please refer to [reference needed]. Figure 8 And related descriptions. In some embodiments, when the clamping arm 100 moves proximally to the position where the mating part 110 contacts the release ring 102, at least a portion of the mating part 110 is located within the sliding groove 412, preventing self-locking after the mating part 110 leaves the sliding groove 412. For example, when the release ring 102 is in the initial position, the axial dimension L1 of the mating part 110 is greater than the distance L2 between the proximal end of the sliding groove 412 and the distal end face of the release ring 102. Thus, when the operator moves the clamping arm 100 proximally and feels feedback resistance, the operator can know that the clamping arm 100 is about to enter the locked state. Since at least a portion of the mating part 110 remains within the sliding groove 412, the operator can control the clamping arm 100 to move distally and reopen the clamping arm 100, which is beneficial for timely correction of the clamping condition of the clamping arm 100 on the wound and improves the hemostasis effect. If the operator determines that the clamping arm 100 can enter the locked state, they can continue to move the clamping arm 100 proximally.

[0134] Figure 12AThis is a schematic diagram showing the release of the receiving tube 101 and the sheath tube 210 according to some embodiments of this specification; Figure 12B It is based on Figure 12A A partially enlarged cross-sectional view of region F of the clamping device 10 shown in some embodiments; Figure 12C It is based on Figure 12A A cross-sectional view of the clamp device 10 along the section line GG, as shown in some embodiments.

[0135] like Figures 12A to 12C In some embodiments, the distal end face of the release ring 102 constitutes the contact surface 103 (e.g., Figure 11B The contact surface 103 is used to form contact with the mating portion 110 when the clamping arm 100 moves towards the proximal end. For example, the portion of the contact surface 103 corresponding to the mating portion 110 is radially expanded inward to improve the reliability of contact with the mating portion 110.

[0136] In some embodiments, when the mating part 110 enters the locking groove 413, the mating part 110 abuts against the contact surface 103. When the clamping arm 100 continues to move towards the proximal end, the mating part 110 drives the release ring 102 to move towards the proximal end together.

[0137] In some embodiments, when the release ring 102 moves from the initial position to the operating position, the release ring 102 engages with the trigger protrusion 430 of the inner tube 400, for example, the release ring 102 moves to a position outside the trigger protrusion 430. The release ring 102 presses the inner tube 400 through the trigger protrusion 430, causing the proximal end of the inner tube 400 to deform radially inward. The inner tube 400 drives the first connecting portion 420 to move radially inward, and the first connecting portion 420 and the second connecting portion 211 disengage, releasing the receiving tube 101 and the sheath 210. Actuating the release of the receiving tube 101 and the sheath 210 by using the release ring 102 helps to simplify the structure and improve control accuracy.

[0138] Figure 13A This is a schematic diagram showing the locking of the clamping arm 100 and the storage tube 101 according to some embodiments of this specification; Figure 13B It is based on Figure 13A A cross-sectional view of the clamp device 10 along the section line HH, as shown in some embodiments. Figure 14A This is a schematic diagram of the clamping arm 100 and the storage tube 101 before locking, according to some embodiments of this specification; Figure 14B This is a schematic diagram showing the clamping arm 100 and the storage tube 101 locked together according to some embodiments of this specification.

[0139] like Figures 13A to 14B As shown, in some embodiments, before the clamping arm 100 and the storage tube 101 are locked, the mating part 110 of the clamping arm 100 is slidably engaged with the sliding groove 412 of the storage tube 101, and the clamping arm 100 can switch between an open state and a closed state.

[0140] In some embodiments, during the process of the mating part 110 moving from the sliding groove 412 into the locking groove 413, the mating part 110 drives the release ring 102 to move towards the proximal end. When the release ring 102 moves to the operating position, the trigger protrusion 430 is located inside the release ring 102. The release ring 102 triggers the cantilever 130 to deform radially inward through the trigger protrusion 430. The width of the sliding groove 412 is reduced to restrict the mating part 110 from moving towards the distal end, and the clamping arm 100 is locked with the receiving tube 101.

[0141] In some embodiments, tolerances exist during the processing and assembly of the various components of the clamping device 10. This may result in a situation where, after the receiving tube 101 and sheath 210 are released, the mating part 110 has not yet fully reached the locking position, leading to locking failure. Therefore, when the mating part 110 drives the release ring 102 to the operating position, a gap is formed between the mating part 110 and the proximal end of the sliding groove 412. From another perspective, when the mating part 110 forms a limiting fit with the proximal end of the sliding groove 412, the proximal end of the mating part 110 and the contact surface 103 of the release ring 102 are arranged with a gap (e.g., ...). Figure 13B (As shown). For example, the clamp 120 includes a curved portion 122 located in the middle, and the curved portion 122 is elastic. The operator controls the clamp arm 100 to move proximally. After the engaging portion 110 drives the release ring 102 to move proximally to the operating position, the operator stops pulling the clamp arm 100 proximally. Under the elastic action of the curved portion 122, the clamp arm 100 rebounds distally within the receiving tube 101, causing the distal end of the engaging portion 110 to abut against the proximity of the sliding groove 412. At this point, the clamp arm 100 and the receiving tube 101 are locked. This gap design ensures that the release ring 102 can only actuate the inner tube 400 to deform radially inward after the engaging portion 110 has completely disengaged from the sliding groove 412, avoiding situations where locking fails or is incorrect, and improving locking reliability.

[0142] In some embodiments, after the engaging part 110 drives the release ring 102 to the operating position, the clamping arm 100 springs back to its distal end. When the distal end of the engaging part 100 moves to the proximal end of the sliding groove 412 to form a fit, the gap width between the proximal end of the engaging part 110 and the contact surface 103 of the release ring 102 is greater than or equal to 0.2 mm. In practical applications, when the locking force is greater than the releasing force, this gap range can prevent the problem of inability to lock.

[0143] Figure 15A This is a schematic diagram of the clamping arm 100 and the spindle 220 before release, according to some embodiments of this specification; Figure 15B This is a schematic diagram showing the release of the clamping arm 100 and the spindle 220 according to some embodiments of this specification; Figure 15C It is based on Figure 15BA cross-sectional view of the clamp device 10 shown in some embodiments along section line II; Figure 15D It is based on Figure 15C A cross-sectional view of the clamp device 10 along the section line JJ, as shown in some embodiments.

[0144] In some embodiments, the connecting end 221 of the mandrel 220 can be releasably connected to the connecting latch 140. For details, please refer to [link / reference needed]. Figures 10A to 10D As shown and its related description.

[0145] like Figure 3 , Figures 15A to 15D As shown, in some embodiments, a stop portion 160 is provided in the middle of the clamping piece 120. When the outer tube 500 or the release ring 102 actuates the trigger protrusion 430, the stop portion 160 and the distal end of the receiving tube 101 form a limit, restricting the movement of the clamping arm 100 towards the proximal end. For example, the clamping piece 120 includes a distal clamping portion 121 and a bending portion 122. The width of the distal clamping portion 121 is greater than the width of the bending portion 122. Then, the stop portion 160 is formed at the connection between the distal clamping portion 121 and the bending portion 122. When the clamping arm 100 is locked, the stop portion 160 abuts against the distal end face of the receiving tube 101, and the receiving tube 101 restricts the movement of the clamping piece 120 towards the proximal end.

[0146] In some embodiments, after the stop 160 and the distal end of the receiving tube 101 form a limiting position, the mandrel 220 moves proximally. When the tension between the mandrel 220 and the connecting buckle 140 reaches a certain value, the connecting buckle 140 deforms axially or radially, causing the connecting end 221 to disengage from the connecting buckle 140. The connecting end 221 is released from the clamping arm 100, and the mandrel 220 continues to move proximally and retracts into the channel of the sheath 210. In actual surgical applications, after the mandrel 220 and the clamping arm 100 are released, the clamping arm 100 and the receiving tube 101 remain at the wound site to achieve hemostasis and wound closure.

[0147] Figure 16A This is a schematic diagram of the clamping arm 100 and the storage tube 101 before disassembly, according to some embodiments of this specification; Figure 16B This is a schematic diagram of the disassembly of the clamping arm 100 and the receiving tube 101 according to some embodiments of this specification; Figure 16C This is a schematic diagram of the disassembled clamp arm 100 and storage tube 101 according to some embodiments of this specification.

[0148] In some embodiments, after the connecting end 221 is released from the clamping arm 100, if the operator finds that the clamping arm 100 is not properly positioned at the wound or has not effectively closed the wound, the clamping arm 100 can be unlocked by the external unlocking tool 700 to achieve free disassembly, which facilitates the operator to perform subsequent operations, correct surgical errors in a timely manner, and improve the success rate of the operation.

[0149] like Figure 8 , Figures 16A to 16C As shown, in some embodiments, when the mating portion 110 of the cantilever 130 engages with the locking groove 413, the tool contact surface 132 protrudes from the disassembly groove 570. The tool contact surface 132 is configured to cause the cantilever 130 to deform or displace radially inward when subjected to a radially inward force, thereby disengaging from the locking groove 413 and unlocking the clamping arm 100 and the receiving tube 101. For example, after the external unlocking tool 700 enters the disassembly groove 570 and engages with the tool contact surface 132, the external unlocking tool 700 can apply a radially inward force to the tool contact surface 132. After the mating portion 110 of the cantilever 130 disengages from the locking groove 413, under the elastic action of the bent portion 122 of the clamping piece 120, the clamping piece 120 moves distally and extends out of the receiving tube 101, reopening the clamping piece 120. By designing the tool contact surface 132, it is easier to engage with the external unlocking tool 700, reducing disassembly difficulty and improving disassembly efficiency.

[0150] Combination Figure 3 In some embodiments, the mating portion 110 is constructed as a bent structure, at least a portion of which forms a tool contact surface 132, which is arranged radially outward. For example, the mating portion 110 is formed by directly bending the cantilever 130 outward, which is easy to process. For example, at least a portion of the outer surface of the bent structure forms a plane with a predetermined area, facilitating contact and engagement with the external unlocking tool 700. The terms "inner" and "outer" of the cantilever 130 refer to the central axis of the clamping arm 100; the side facing the central axis of the clamping arm 100 is called "inner," and the side facing away from the central axis of the clamping arm 100 is called "outer."

[0151] In some embodiments, an anti-slip structure 115 is provided on the tool contact surface 132 (see...). Figure 36 The anti-slip structure 115 includes at least one of the following: textured structure, toothed structure, elastic pad, anti-slip coating, and groove. When the tool contact surface 132 and the external unlocking tool 700 are engaged, the anti-slip structure 115 can increase the contact friction between the two, prevent the external unlocking tool 700 from slipping off during the unlocking process, and improve the success rate of disassembly.

[0152] Figure 17 This is a partially enlarged cross-sectional view of the distal assembly of the clamping device 10 as shown in some embodiments of this specification.

[0153] like Figure 17As shown, in some embodiments, the axial dimension L3 of the tool contact surface 132 is less than or equal to the mating dimension of the external unlocking tool 700. This allows the external unlocking tool 700 to cover the tool contact surface 132 as much as possible, making the mating more reliable and preventing the cantilever 130 from slipping off the external unlocking tool 700 when it moves radially inward. The mating dimension of the external unlocking tool 700 can be the axial dimension of its working end along the receiving tube 101. The working end is the part of the external unlocking tool 700 that directly contacts the tool contact surface 132 and performs a specific task. For example, when the external unlocking tool 700 is a snare, the wire diameter of the snare can be the aforementioned mating dimension.

[0154] In some embodiments, the effective axial dimension L4 of the disassembly groove 570 is larger than the mating dimension of the external unlocking tool 700, so as to allow the external unlocking tool 700 to smoothly enter the disassembly groove 570. Herein, the effective axial dimension L4 of the disassembly groove 570 refers to the axial dimension between the distal end face of the disassembly groove 570 and the contact surface 103 of the release ring 102.

[0155] In some embodiments, the difference ΔL between the axial dimension L3 of the tool contact surface 132 and the effective axial dimension L4 of the disassembly groove 570 is less than half of the mating dimension of the external unlocking tool 700. This prevents the working end of the external unlocking tool 700 from falling into the gap between the mating part 110 and the release ring 102, thereby improving the reliability and success rate of disassembly.

[0156] The clamping device 10 provided in Embodiment 2 of this specification will now be described in detail. It should be noted that Embodiment 2 will focus on describing structures or features that differ from Embodiment 1; other structures or features can be referenced or adapted from the relevant descriptions in Embodiment 1.

[0157] Figure 18 This is a schematic diagram of the structure of the clamp arm 100 according to some embodiments of this specification. Figure 19 This is a structural schematic diagram of the clamp arm 100 according to some other variations of this specification. Figure 20 This is a structural schematic diagram of the inner tube 400 according to some embodiments of this specification. Figure 21 This is a structural schematic diagram of the outer tube 500 according to some embodiments of this specification. Figure 22A This is a structural diagram of the clamping arm 100 and the receiving tube 101 before assembly, according to some embodiments of this specification. Figure 22B This is a schematic diagram of the structure after the clamping arm 100 and the receiving tube 101 are assembled according to some embodiments of this specification. Figure 23 This is a schematic diagram of the structure after the clamping arm 100 and the receiving tube 101 are assembled according to some embodiments of this specification.

[0158] like Figures 18 to 23 As shown, Embodiment 2 of this specification provides a clamping device 10, which includes a clamping arm 100 and a receiving tube 101.

[0159] In some embodiments, the clamping arm 100 includes at least two clamping plates 120, the proximal ends of which are fixedly connected. The clamping arm 100 also includes a cantilever 130, one end of which is connected to the proximal end of the clamping plates 120, and the other end extending along the central axis of the at least two clamping plates 120. The proximal end of the cantilever 130 includes a mating portion 110 having a tool contact surface 132. The sidewall of the receiving tube 101 is formed with at least one elongated groove 410 extending axially. The tool contact surface 132 of the clamping arm 100 is configured such that, when subjected to a radially inward force, the proximal end of the cantilever 130 deforms radially inward to allow entry into a channel of the receiving tube 101; after the cantilever 130 returns to its free state, the mating portion 110 movably engages with the elongated groove 410. More detailed examples of the clamping arm 100 and the receiving tube 101 can be found in [reference needed]. Figures 2 to 5 And its related descriptions.

[0160] According to the scheme in the above embodiment, the tool contact surface 132 is designed so that the clamping arm 100 and the receiving tube 101 can be assembled by an external assembly tool. For example, the clamping arm 100 and the receiving tube 101 can be automatically assembled on a tooling table to improve assembly efficiency. After the clamping arm 100 and the receiving tube 101 are assembled, the elongated groove 410 ensures that the clamping arm 100 can only move along the axial direction of the receiving tube 101 and effectively limits the maximum stroke of the clamping arm 100 in the receiving tube 101, ensuring that the position and direction of movement of the clamping arm 100 can be precisely controlled during operation.

[0161] In some embodiments, the sidewall of the receiving tube 101 is formed with a disassembly groove 570 extending in the circumferential direction. For example, the receiving tube 101 includes an inner tube 400 and an outer tube 500. The disassembly groove 570 of the inner tube 400 is arranged intersecting with the elongated groove 410, and the disassembly groove 570 of the outer tube 500 is formed by a slot spaced from its end. The disassembly grooves 570 of the inner tube 400 and the outer tube 500 are the same size in the circumferential direction and correspond in position. In some embodiments, the disassembly groove 570 is used to receive an external unlocking tool 700, and the cantilever 130 deforms or displaces radially inward when subjected to the force of the external unlocking tool 700. For example, the external unlocking tool 700 includes, but is not limited to, a snare, a clamp, etc.

[0162] In some embodiments, the mating portion 110 of the cantilever 130 corresponds to the position of the disassembly groove 570, and when the cantilever 130 deforms or displaces radially inward, the clamping arm 100 and the receiving tube 101 are unlocked. By providing the disassembly groove 570, it is convenient to unlock the clamping arm 100 after it has been locked, so as to adjust or remove the clamping arm 100 and enhance the fault tolerance of the clamping device 10.

[0163] The structural details of the clamp device 10 provided in Embodiment 2 will be described below.

[0164] Figure 24 This is an assembly drawing of the inner tube 400 and the outer tube 500 according to some embodiments of this specification.

[0165] like Figures 20 to 24 As shown, in some embodiments, the receiving tube 101 includes an inner tube 400, and the side wall of the inner tube 400 is provided with a trigger protrusion 430. In some embodiments, the receiving tube 101 also includes an outer tube 500, and the side wall of the outer tube 500 is provided with a clearance hole 510. The outer tube 500 is sleeved on the outside of the inner tube 400, and the position of the outer tube 500 is adjusted so that the trigger protrusion 430 is located in the clearance hole 510. At this time, it can be ensured that the outer tube 500 is sleeved in the preset position of the inner tube 400. The trigger protrusion 430 and the clearance hole 510 have the function of assembly positioning. It only needs to be aligned and inserted with an assembly tool. The operation is simple and the assembly accuracy is high.

[0166] In some embodiments, the outer wall of the inner tube 400 is provided with a trigger protrusion 430, which protrudes radially from the outer wall of the inner tube 400. The outer tube 500 and the inner tube 400 are axially movable. When the outer tube 500 moves axially relative to the inner tube 400 and the trigger protrusion 430 moves away from the clearance hole 510, the outer tube 500 can apply a radially inward force to the side wall of the inner tube 400 through the trigger protrusion 430.

[0167] In some embodiments, the outer tube 500 includes a spring piece 540, and the inner tube 400 includes a first limiting hole 440. Before assembly, the spring piece 540 is parallel to the axis of the outer tube 500, that is, the spring piece 540 does not protrude from the inner wall of the outer tube 500. After assembly, the spring piece 540 is bent using an external assembly tool (such as an external bending device) so that the spring piece 540 engages with the first limiting hole 440.

[0168] In some embodiments, when the outer tube 500 is sleeved on the inner tube 400 at a preset position, the spring piece 540 corresponds to the position of the first limiting hole 440, the disassembly groove 570 of the inner tube 400 corresponds to the position of the disassembly groove 570 of the outer tube 500, and the proximal end of the inner tube 400 protrudes from the proximal end of the outer tube 500.

[0169] In some embodiments, a long groove 410 is provided on the side wall of the inner tube 400. The long groove 410 includes a sliding groove 412 and a locking groove 413. When the mating part 110 is engaged with the sliding groove 412, the clamping arm 100 switches between an open state and a closed state. When the mating part 110 is engaged with the locking groove 413, the clamping arm 100 is locked with the storage tube 101.

[0170] In some embodiments, the disassembly groove 570 of the inner tube 400 at least partially overlaps with the locking groove 413, and the disassembly groove 570 of the outer tube 500 corresponds to the locking groove 413. For example, in the circumferential direction, the circumferential width of the disassembly groove 570 is greater than the circumferential width of the locking groove 413. This design ensures both the strength requirements of the proximal end of the inner tube 400 and sufficient depth for the external unlocking tool 700.

[0171] Figure 25 This is a schematic diagram of the structure after the storage tube 101 and the sheath tube 210 are assembled, according to some embodiments of this specification.

[0172] Such as 24 and Figure 25 As shown, in some embodiments, the clamp device 10 further includes a sheath 210. A first connecting portion 420 is provided at the proximal end of the receiving tube 101, and a second connecting portion 211 is provided at the distal end of the sheath 210. When the first connecting portion 420 and the second connecting portion 211 approach each other axially, the second connecting portion 211 actuates the first connecting portion 420 to undergo radially inward displacement. After the second connecting portion 211 passes the first connecting portion 420, the first connecting portion 420 returns to its initial position and forms an axial limit with the second connecting portion 211. Thus, during assembly, only the relative displacement between the receiving tube 101 and the sheath 210 needs to be changed, without the need for additional external assembly tools, making assembly simple and efficient. For more embodiments regarding the first connecting portion 420 and the second connecting portion 211, please refer to... Figures 9A to 9C And its related descriptions.

[0173] Figure 26A This is a schematic diagram of the structure of the clamping arm 100 and the spindle 220 before assembly, according to some embodiments of this specification; Figure 26B This is a schematic diagram of the structure of the clamping arm 100 and the mandrel 220 when assembled according to some embodiments of this specification.

[0174] like Figure 26A and Figure 26B As shown, in some embodiments, the clamp arm 100 further includes a connecting buckle 140, which is located at the proximal end of the clamp piece 120. The clamping device 10 also includes a spindle 220 and a connecting end 221 located at the distal end of the spindle 220. The connecting end 221 is releasably connected to the connecting buckle 140.

[0175] Combination Figure 18 and Figure 19In some embodiments, the clamping arm 100 includes a fixing portion 150, through which at least two clamping pieces 120 are fixed. For example, the fixing portion 150 is an annular structure, such as a circular ring or a rectangular ring; the fixing portion 150 can be fixed to the proximal end of the clamping pieces 120 by means of integral molding or welding. In some embodiments, a cantilever 130 is connected to the proximal end of the fixing portion 150. The cantilever 130 has an appropriate length that meets application requirements in terms of elasticity and connection strength.

[0176] In some embodiments, the connecting buckle 140 includes a first limiting structure 142 and a second limiting structure 143. The first limiting structure 142 is disposed on the cantilever 130, and the second limiting structure 143 is disposed on the cantilever 130 or the fixing part 150. The first limiting structure 142 and the second limiting structure 143 form a channel for fastening the connecting end 221.

[0177] For example, when the first limiting structure 142 engages with the connecting end 221, the clamping arm 100 and the spindle 220 achieve axial limiting. For example, the clamping arm 100 includes at least two cantilever arms 130, the middle part of which is constructed as a radially inward bending structure, the bending structure being constructed as the first limiting structure 142, and the distal end of the connecting end 221 including a limiting groove 223. When the first limiting structure 142 is deformed or displaced under force, the first limiting structure 142 engages or disengages from the limiting groove 223. For example, the guide head 222 of the connecting end 221 includes a bevel facing the distal end. When the connecting end 221 and the clamping arm 100 approach each other, the guide head 222 presses against the first limiting structure 142, causing the cantilever 130 to elastically deform radially outward. The space between at least two cantilever 130 increases to allow the guide head 222 to completely pass over the first limiting structure 142. Then, the cantilever 130 returns to its original state, allowing the first limiting structure 142 to engage within the limiting groove 223, thus completing the connection between the connecting end 221 and the clamping arm 100. For example, the proximal surface of the guide head 222 is a bevel or a plane parallel to the radial direction. When the tension between the connecting end 221 and the clamping arm 100 reaches a certain value, the guide head 222 causes the cantilever 130 to elastically deform, causing the first limiting structure 142 to disengage from the limiting groove 223, thus releasing the connecting end 221 from the clamping arm 100.

[0178] For example, the second limiting structure 143 is configured to limit the lateral displacement of the connecting end 221, wherein the lateral displacement refers to the displacement in the direction perpendicular to the central axis of the clamping arm 100. For example, as Figure 18As shown, the second limiting structure 143 protrudes from the side of the cantilever 130 toward the adjacent cantilever 130, and is used to confine the connecting end 221 within the space between the first limiting structures 142; for example, one second limiting structure 143 is provided between each adjacent cantilever 130, and the two limiting structures are arranged with a gap to avoid affecting the deformation performance of the cantilever 130. For example, as Figure 19 As shown, the second limiting structure 143 is constructed as a protrusion. The second limiting structure 143 protrudes axially from the near end of the fixing part 150. When the connecting end 221 is engaged with the connecting buckle 140, the second limiting structure 143 restricts the lateral displacement of the connecting end 221.

[0179] In some embodiments, such as Figure 20 As shown, the distal end of the elongated groove 410 forms an increased-width assembly groove 411, i.e., the assembly groove 411 is located at the distal end of the sliding groove 412, and the circumferential width of the assembly groove 411 is greater than the circumferential width of the sliding groove 412. When the mating part 110 mates with the assembly groove 411, the assembly groove 411 allows the cantilever 130 to deform under force, thereby increasing the channel size of the connecting buckle 140, so that the connecting end 221 can be fastened into the connecting buckle 140. The design of the assembly groove 411 makes it easier to mate the clamping arm 100 with the connecting end 221. In some embodiments, the proximal end of the assembly groove 411 is provided with a guide slope to guide the mating part 110 into the sliding groove 412, ensuring the smooth movement of the mating part 110. In some embodiments, such as Figure 21 As shown, the side wall of the outer tube is provided with an assembly hole 580, which is aligned with the assembly groove 411 to provide space for the deformation of the cantilever 130.

[0180] In some embodiments, such as Figure 26A and Figure 26B As shown, after the receiving tube 101 is connected to the sheath tube 210, the mating part 110 of the clamping arm 100 is adjusted into the assembly groove 411. Next, the spindle 220 moves to the distal end and enters the receiving tube 101. When the connecting end 221 and the connecting buckle 140 approach each other and form a compression, the guide head 222 compresses the first limiting structure 142. The mating part 110 of the cantilever 130 undergoes elastic deformation radially outward in the assembly groove 411, increasing the space between at least two cantilever 130s to allow the guide head 222 to completely pass over the first limiting structure 142. Then, the cantilever 130 returns to its original state, allowing the first limiting structure 142 to engage in the limiting groove 223. The connection of the connecting end 221 and the clamping arm 100 is completed.

[0181] In some embodiments, a stop protrusion 114 is formed on the mating portion 110. When the mating portion 110 mates with the sliding groove 412, the stop protrusion 114 slides in contact with the inner wall of the receiving tube 101 to limit the deformation of the bending structure of the cantilever 130. By providing the stop protrusion 114, when the mating portion 110 mates with the sliding groove 412, the stop protrusion 114 can limit the radial outward deformation of the mating portion 110, preventing the clamping arm 100 and the connecting end 221 from accidentally falling off.

[0182] Figure 27 This is a schematic diagram of the structure of the clamping arm 100 and the receiving tube 101 after assembly according to some embodiments of this specification; Figure 28A This is a schematic diagram of the assembly angle of the stop plate 560 according to some embodiments of this specification. Figure 28B This is a schematic diagram of the assembly angle of the stop plate 560 according to some other variations of this specification.

[0183] like Figure 20 and Figure 27 As shown, in some embodiments, a stop plate 560 is provided at the distal end of the receiving tube 101. The stop plate 560 is located between at least two clamping plates 120 and is used to limit the extreme position of the fixing part 150 of the clamping arm 100 to move distally. For example, there is one or two stop plates 560. When one stop plate 560 is provided, at least one end of the stop plate 560 is fixed to the distal end of the receiving tube 101. When two stop plates 560 are provided, one end of the stop plate 560 is fixed to the receiving tube 101, and the other end is a suspended end. For example, the stop plate 560 is provided in the inner tube 400. For example, when the clamping arm 100 moves to the extreme position distally, the connecting end 221 or the fixing part 150 abuts against the stop plate 560 to prevent the clamping arm 100 from extending excessively out of the receiving tube 101. In some other embodiments, the stop plate 560 also serves to expand the clamp plate 120 during the opening of the clamp arm 100.

[0184] In some embodiments, before the connecting end 221 aligns with the connecting latch 140 of the clamping arm 100, the stop plate 560 extends along the central axis of the receiving tube 101 to allow the clamping arm 100 to pass through when it enters the receiving tube 101. After the connecting end 221 aligns with the connecting latch 140 of the clamping arm 100, the mating portion 110 of the clamping arm 100 remains in the assembly groove 411. When subjected to external force, the stop plate 560 folds radially inward, thereby stopping the clamping arm 100 from moving to its extreme position.

[0185] When the clamping arm 100 is opened, if the mating part 110 is within the mounting groove 411, the cantilever 130 is prone to deformation, causing the clamping arm 100 and the connecting buckle 140 to accidentally disengage. Therefore, during the folding process of the stop plate 560, after the stop plate 560 abuts against the fixing part 150 or the connecting end 221, it can drive the clamping arm 100 and the spindle 220 to move proximally together. When the stop plate 560 is folded into place, at least a portion of the proximity of the mating part 110 is located within the sliding groove 412. This prevents the clamping arm 100 and the connecting buckle 140 from accidentally disengaging.

[0186] In some embodiments, the included angle θ between the stop plate 560 and the axis of the receiving tube 101 ranges from 50° to 90°. For example, as... Figure 28A As shown, the stop plate 560 is arranged at an angle relative to the distal end face of the receiving tube 101. This angle causes the stop plate 560 to protrude beyond the distal end of the receiving tube 101, thereby increasing the travel of the clamping arm 100 to the distal end. Because the travel of the clamping arm 100 to the distal end increases, the length of the clamping arm 100 extending beyond the receiving tube 101 increases, thereby increasing the span between at least two clamping plates 120. On the other hand, the angle between the stop plate 560 and the axis of the receiving tube 101 is greater than or equal to 50° to ensure the limiting strength of the stop plate 560 on the clamping arm 100. For example, as... Figure 28B As shown, the stop plate 560 is arranged parallel or approximately parallel to the end face of the distal end of the receiving tube 101, which provides a good limiting effect on the stroke of the clamping arm 100.

[0187] Figure 29A This is a schematic diagram of the clamping arm 100 in the closed state according to some embodiments of this specification; Figure 29B It is based on Figure 29A A partial enlarged view of region K of the clamping device 10 shown in some embodiments. Figure 29C It is based on Figure 29A A cross-sectional view of the clamp device 10 along the section line MM, as shown in some embodiments.

[0188] like Figures 29A to 29C As shown, in some embodiments, the long groove 410 includes a sliding groove 412 and a locking groove 413. When the mating part 110 is engaged with the sliding groove 412, the clamping arm 100 switches between an open state and a closed state. When the mating part 110 is engaged with the locking groove 413, the clamping arm 100 is locked with the storage tube 101.

[0189] For example, when the spindle 220 controls the clamping arm 100 to move distally to the open limit position, the clamping piece 120 extends from the distal end of the receiving tube 101 and is in an open state. At this time, at least a portion of the mating part 110 is located within the sliding groove 412, preventing the connecting end 221 and the clamping arm 100 from being accidentally released. For example, when the spindle 220 controls the clamping arm 100 to move proximally to the closed limit position, the clamping piece 120 retracts to the proximity of the receiving tube 101 and is in a closed state. At this time, the mating part 110 contacts the proximity sidewall of the disassembly groove 570 of the outer tube 500. The proximity sidewall of the disassembly groove 570 forms a movement resistance on the mating part 110, indicating to the operator that the current position is the closed limit position. Continuing to operate the spindle 220 to move proximally will cause the clamping arm 100 to enter the locked state.

[0190] In some embodiments, when the clamping arm 100 moves proximally to the closed limit position, at least a portion of the mating part 110 is located within the sliding groove 412, such that the distal end of the mating part 110 is still located within the sliding groove 412, to prevent self-locking after the mating part 110 leaves the sliding groove 412. For example, such as... Figure 29B As shown, when the outer tube 500 is in its initial position, the axial dimension L1 of the mating part 110 is greater than the distance L2 between the proximal end of the sliding groove 412 and the proximal end face of the disassembly groove 570. Thus, when the operator moves the clamping arm 100 proximally and feels feedback resistance, the operator can know that the clamping arm 100 is about to enter the locking state. Since at least a portion of the mating part 110 remains within the sliding groove 412, the operator can control the clamping arm 100 to move distally and reopen it, which facilitates timely correction of the clamping position of the clamping arm 100 on the wound and improves hemostasis. If the operator determines that the clamping arm 100 can enter the locking state, they can continue to move the clamping arm 100 proximally.

[0191] Figure 30A This is a cross-sectional view showing the release of the receiving tube 101 and the sheath tube 210 according to some embodiments of this specification; Figure 30B This is a cross-sectional view of the storage tube 101 and sheath tube 210 as shown in some embodiments of this specification, cut in another direction.

[0192] like Figure 21 , Figure 30A and Figure 30B As shown, in some embodiments, the outer tube 500 is axially movable and sleeved outside the inner tube 400. A contact surface 520 is formed in the disassembly groove 570 of the outer tube 500, such as the proximal end face of the disassembly groove 570. In some embodiments, the sidewall of the proximal end of the outer tube 500 is recessed inward, so that the contact surface 520 protrudes radially inward. In this way, when the mating part 110 moves to the proximal end of the disassembly groove 570, the mating area between the contact surface 520 and the mating part 110 is as large as possible to improve the reliability of the mating.

[0193] In some embodiments, when the mating part 110 enters the locking groove 413, the mating part 110 abuts against the contact surface 520, causing the mating part 110 to drive the outer tube 500 to move towards the proximal end.

[0194] In some embodiments, when the outer tube 500 moves from the initial position to the operating position, the trigger protrusion 430 moves away from the clearance hole 510 of the outer tube 500 and into the inner wall of the outer tube 500. At this time, the outer tube 500 engages with the trigger protrusion 430. The outer tube 500 compresses the inner tube 400 through the trigger protrusion 430, causing the proximal end of the inner tube 400 to deform radially inward. The inner tube 400 drives the first connecting portion 420 to move radially inward, and the first connecting portion 420 and the second connecting portion 211 disengage, releasing the receiving tube 101 and the sheath tube 210. Actuating the release of the inner tube 400 and the sheath tube 210 through the outer tube 500 simplifies the structure and improves control accuracy.

[0195] Figure 31A This is a schematic diagram showing the locking of the clamping arm 100 and the storage tube 101 according to some embodiments of this specification; Figure 31B It is based on Figure 31A A cross-sectional view of the clamp device 10 along the cutting line NN, as shown in some embodiments. Figure 32A This is a schematic diagram of the clamping arm 100 and the storage tube 101 before locking, according to some embodiments of this specification; Figure 32B This is a schematic diagram showing the clamping arm 100 and the storage tube 101 locked together according to some embodiments of this specification.

[0196] like Figures 31A to 32B As shown, in some embodiments, before the clamping arm 100 and the storage tube 101 are locked, the mating part 110 of the clamping arm 100 is slidably engaged with the sliding groove 412 of the storage tube 101, and the clamping arm 100 can switch between an open state and a closed state.

[0197] In some embodiments, the outer tube 500 is axially movable and sleeved on the outside of the inner tube 400. The outer tube 500 includes an initial position and an operating position: in the initial position, the trigger protrusion 430 is located inside the clearance hole 510, and the inner tube 400 is in a natural state; during the process of the mating part 110 moving from the sliding groove 412 into the locking groove 413, the mating part 110 drives the outer tube 500 to move towards the proximal end. When the outer tube 500 moves to the operating position, the trigger protrusion 430 is located inside the outer tube 500. The outer tube 500 triggers the cantilever 130 to deform radially inward through the trigger protrusion 430. The width of the sliding groove 412 is reduced to restrict the movement of the mating part 110 towards the distal end, and the clamping arm 100 is locked with the receiving tube 101.

[0198] In some embodiments, tolerances exist during the processing and assembly of the various components of the clamping device 10. This may result in a situation where, after the receiving tube 101 and sheath 210 are released, the mating part 110 has not yet fully reached the locking position, leading to locking failure. Therefore, when the mating part 110 drives the outer tube 500 to the operating position, a gap is formed between the mating part 110 and the proximal end of the sliding groove 412. From another perspective, when the mating part 110 forms a limiting fit with the proximal end of the sliding groove 412, the proximal end of the mating part 110 is arranged with a gap between it and the contact surface 520 of the outer tube 500. For example, the clamp 120 includes a bent portion 122 located in the middle, and the bent portion 122 is elastic. The operator controls the clamping arm 100 to move proximally. After the mating part 110 drives the outer tube 500 to move proximally to the operating position, the operator stops pulling the clamping arm 100 proximally. Under the elastic action of the bending part 122, the clamping arm 100 rebounds distally within the receiving tube 101. After the mating part 110 moves distally a certain distance, it abuts against the proximity of the sliding groove 412. At this point, the clamping arm 100 and the receiving tube 101 are locked. This gap design ensures that the release ring 102 can only actuate the inner tube 400 to deform radially inward after the mating part 110 has completely left the sliding groove 412, avoiding situations where locking fails or is incorrect, and improving locking reliability.

[0199] In some embodiments, after the mating part 110 drives the outer tube 500 to the operating position, the clamping arm 100 springs back to its distal end. When the distal end of the mating part 100 moves to the proximal end of the sliding groove 412 to form a fit, the gap width between the proximal end of the mating part 110 and the contact surface 520 of the outer tube 500 is greater than or equal to 0.2 mm. In practical applications, when the locking force is greater than the releasing force, this gap range can prevent the problem of inability to lock.

[0200] In some embodiments, one of the inner tube 400 and the outer tube 500 includes a spring piece 540, and the other includes a first limiting hole 440 and a second limiting hole 450. When the outer tube 500 is in the initial position, the spring piece 540 engages with the first limiting hole 440, causing the outer tube 500 to form an axial limit with the inner tube 400 in the initial position. When the outer tube 500 is in the operating position, the spring piece 540 engages with the second limiting hole 450, causing the outer tube 500 to form an axial limit with the inner tube 400 in the operating position. For example, the first limiting hole 440 and the second limiting hole 450 are arranged axially spaced apart. After the engaging portion 110 of the clamping arm 100 engages with the contact surface 520 of the outer tube 500, the clamping arm 100 continues to move proximally, driving the outer tube 500 to move proximally. The spring piece 540 disengages from the first limiting hole 440. When the outer tube 500 moves to the operating position, the spring piece 540 enters the second limiting hole 450.

[0201] Figure 33A This is a schematic diagram of the stop arm 441 before deformation, according to some embodiments of this specification; Figure 33BThis is a schematic diagram of the modified stop arm 441 according to some embodiments of this specification.

[0202] like Figures 33A to 33B As shown, in some embodiments, the first limiting hole 440 and the second limiting hole 450 are connected, and a stop arm 441 is formed between the first limiting hole 440 and the second limiting hole 450. For example, during the process of the spring piece 540 entering the second limiting hole 450 from the first limiting hole 440, the spring piece 540 causes the stop arm 441 to deform, thereby widening the channel between the first limiting hole 440 and the second limiting hole 450, allowing the spring piece 540 to enter the second limiting hole 450 from the first limiting hole 440.

[0203] In some embodiments, the driving force F required for the mating part 110 to move the outer tube 500 proximally is determined based on the length L5 of the stop arm 441. Thus, by adjusting the length of the stop arm 441, the driving force F can be adjusted to a suitable range, facilitating operator control. For example, the length L5 of the stop arm 441 is configured such that the driving force F required to control the movement of the outer tube 500 proximally is in the range of 30N to 80N.

[0204] Figure 34A This is a schematic diagram of the clamping arm 100 and the spindle 220 before release, according to some embodiments of this specification; Figure 34B It is based on Figure 34A A cross-sectional view of the clamping device 10 along the cutting line PP, as shown in some embodiments; Figure 34C This is a schematic diagram of the clamping arm 100 and the mandrel 220 after release, according to some embodiments of this specification.

[0205] In some embodiments, the connecting end 221 of the mandrel 220 can be releasably connected to the connecting latch 140. For details, please refer to [link / reference needed]. Figures 10A to 10D As shown and its related description.

[0206] like Figure 18 , Figures 34A to 34C As shown, in some embodiments, a stop portion 160 is provided in the middle of the clamp 120. When the outer tube 500 or the release ring 102 actuates the trigger protrusion 430, the stop portion 160 and the distal end of the receiving tube 101 form a limit, restricting the movement of the clamp arm 100 to the proximal end. In some embodiments, the proximal end of the outer tube 500 and the distal end of the sheath 210 form a limit, the sheath 210 restricts the movement of the outer tube 500 to the proximal end, and the outer tube 500 restricts the movement of the clamp arm 100 to the proximal end.

[0207] In some embodiments, after the stop 160 and the distal end of the receiving tube 101 form a limiting position, the mandrel 220 moves proximally. When the tension between the mandrel 220 and the connecting latch 140 reaches a certain value, the connecting latch 140 deforms axially or radially, causing the connecting end 221 to disengage from the connecting latch 140. The connecting end 221 is released from the clamping arm 100, and the mandrel 220 continues to move proximally and retracts into the sheath 210 channel. In actual surgical applications, after the mandrel 220 and clamping arm 100 are released, the clamping arm 100 and the receiving tube 101 remain at the wound site to achieve hemostasis and wound closure. More examples of the release of the mandrel 220 and clamping arm 100 can be found in [reference needed]. Figures 15A to 15D And its related descriptions.

[0208] Figure 35A This is a schematic diagram of the clamping arm 100 and the storage tube 101 before disassembly, according to some embodiments of this specification; Figure 35B This is a schematic diagram of the disassembly of the clamping arm 100 and the receiving tube 101 according to some embodiments of this specification; Figure 35C This is a schematic diagram of the disassembled clamp arm 100 and storage tube 101 according to some embodiments of this specification.

[0209] In some embodiments, after the connecting end 221 is released from the clamping arm 100, if the operator finds that the clamping arm 100 is not properly positioned at the wound or has not effectively closed the wound, the clamping arm 100 can be unlocked by the external unlocking tool 700 to achieve free disassembly, which facilitates the operator to perform subsequent operations, correct surgical errors in a timely manner, and improve the success rate of the operation.

[0210] like Figures 35A to 35C As shown, in some embodiments, when the mating portion 110 of the cantilever 130 engages with the locking groove 413, the tool contact surface 132 protrudes from the disassembly groove 570. The tool contact surface 132 is configured to cause the cantilever 130 to deform or displace radially inward when subjected to a radially inward force, thereby disengaging from the locking groove 413 and unlocking the clamping arm 100 and the receiving tube 101. For example, after the external unlocking tool 700 enters the disassembly groove 570 and engages with the tool contact surface 132, the external unlocking tool 700 can apply a radially inward force to the tool contact surface 132. After the mating portion 110 of the cantilever 130 disengages from the locking groove 413, under the elastic action of the bent portion 122 of the clamping piece 120, the clamping piece 120 moves distally and extends out of the receiving tube 101, reopening the clamping piece 120. By designing the tool contact surface 132, it is easier to engage with the external unlocking tool 700, reducing disassembly difficulty and improving disassembly efficiency.

[0211] In some embodiments, the mating portion 110 is configured as a bent structure, at least a portion of which forms a tool contact surface 132, which is arranged radially outward. For example, the mating portion 110 protrudes radially outward in an arched shape from the cantilever 130, facilitating machining. For example, at least a portion of the outer surface of the bent structure forms a plane with a predetermined area, facilitating contact and engagement by an external unlocking tool 700. For example, the middle portion of the cantilever 130 is bent inward to form a first limiting structure 142 connecting the latch 140, and the proximal end of the cantilever 130 is bent outward to form the mating portion 110. The terms "inner" and "outer" of the cantilever 130 refer to the central axis of the clamping arm 100; the side facing the central axis of the clamping arm 100 is called "inner," and the side facing away from the central axis of the clamping arm 100 is called "outer."

[0212] In some embodiments, the axial dimension L3 of the tool contact surface 132 is less than or equal to the mating dimension of the external unlocking tool 700. This allows the external unlocking tool 700 to cover the tool contact surface 132 as much as possible, making the mating more reliable and preventing the cantilever 130 from slipping off the external unlocking tool 700 when it moves radially inward. In some embodiments, the effective axial dimension L4 of the disassembly groove 570 is greater than the mating dimension of the external unlocking tool 700, allowing the external unlocking tool 700 to smoothly enter the disassembly groove 570. In some embodiments, the difference ΔL between the axial dimension L3 of the tool contact surface 132 and the effective axial dimension L4 of the disassembly groove 570 is less than half the mating dimension of the external unlocking tool 700. This prevents the working end of the external unlocking tool 700 from falling into the gap between the mating part 110 and the release ring 102, improving the reliability and success rate of disassembly. See [link to relevant examples] for more examples of the various dimensions. Figure 17 And its related descriptions.

[0213] Figure 36 This is a structural schematic diagram of the clamp device 10 according to some other variations of this specification.

[0214] like Figure 36 As shown, in some embodiments, an anti-slip structure 115 is provided on the tool contact surface 132. The anti-slip structure 115 is constructed as a groove, which can engage with the working end of the external unlocking tool 700 to prevent slippage. In other embodiments, the anti-slip structure 115 includes at least one of a textured structure, a toothed structure, an elastic pad, an anti-slip coating, and a groove. When the tool contact surface 132 and the external unlocking tool 700 engage, the anti-slip structure 115 can increase the contact friction between the two, preventing the external unlocking tool 700 from slipping during the unlocking process and improving the success rate of disassembly.

[0215] Combination Figure 21As shown, at least one of the disassembly groove 570 and the locking groove 413 includes a guide surface 571, which is configured to guide the working end of the external unlocking tool 700 onto the tool contact surface 132. After entering the disassembly groove 570, the working end of the external unlocking tool 700 can accurately engage with the tool contact surface 132, achieving automatic alignment.

[0216] Figure 37 This is a schematic diagram of the disassembly of the clamping arm 100 and the receiving tube 101 according to some other variations of this specification.

[0217] like Figure 37 As shown, in some embodiments, the spring 540 of the outer tube 500 includes a hook portion 541 (e.g., Figure 38 As shown, the extension 542 is fixed to the outer tube 500 at its proximal end, and the hook 541 is located at the distal end of the extension 542. When the clamping arm 100 is locked with the receiving tube 101, the hook 541 engages with the second limiting hole 450, for example, the hook 541 abuts against the distal end of the second limiting hole 450, so that the trigger protrusion 430 on the inner tube 400 is held inside the outer tube 500. In some embodiments, the second limiting hole 450 is elongated in the axial direction to provide deformation space for the extension 542.

[0218] In some embodiments, the spring 540 is also used to receive the external unlocking tool 700. Under the action of the external unlocking tool 700, the extension 542 deforms radially inward, releasing the axial restraint between the outer tube 500 and the inner tube 400. For example, the external unlocking tool 700 applies a radially inward force to the distal end of the extension 542, the direction of which can be as follows: Figure 37 As indicated by the arrow in the diagram, the extension 542 bends inward under force, causing the hook 541 to disengage from the distal end of the second limiting hole 450. In some embodiments, the trigger protrusion 430 of the inner tube 400 gradually protrudes from the distal end to the proximal end of the inner tube 400's sidewall. After the hook 541 disengages from the distal end of the second limiting hole 450, the inner tube 400 actuates the outer tube 500 to move distally via the trigger protrusion 430, releasing the sliding groove 412 from the mating part 110 and unlocking the clamping arm 100 from the receiving tube 101.

[0219] Figure 38 This is a schematic diagram of the disassembly of the clamping arm 100 and the receiving tube 101 according to some variations of this specification.

[0220] In some embodiments, the spring 540 of the outer tube 500 includes a hook 541 and an extension 542, the proximal end of the extension 542 being fixed to the outer tube 500, and the hook 541 being located at the distal end of the extension 542. When the clamping arm 100 is locked with the receiving tube 101, the hook 541 engages with the second limiting hole 450, holding the outer tube 500 in the operating position.

[0221] In some embodiments, the spring 540 is also used to receive the external unlocking tool 700. Under the action of the external unlocking tool 700, the extension 542 deforms radially outward, releasing the axial constraint between the outer tube 500 and the inner tube 400. For example, the external unlocking tool 700 applies a radially inward force to the proximal end of the extension 542, the direction of which can be as follows: Figure 38 As indicated by the arrow in the diagram, the extension 542 bends outward under force, disengaging the hook 541 from the second limiting hole 450. In some embodiments, the trigger protrusion 430 of the inner tube 400 gradually protrudes from the distal end to the proximal end of the inner tube 400's sidewall. When the hook 541 disengages from the distal end of the second limiting hole 450, the inner tube 400 actuates the outer tube 500 to move distally via the trigger protrusion 430, releasing the sliding groove 412 from the engaging portion 110 and unlocking the clamping arm 100 from the receiving tube 101.

[0222] The clamp device 10 provided in Embodiment 3 of this specification will now be described in detail. First, it should be noted that Embodiment 3 focuses on improving the sheath tube 210 and the mandrel 220. These improved features can be applied to the clamp devices 10 of Embodiments 1 and 2, as well as to other types of clamp devices 10.

[0223] Figure 39 This is a schematic diagram of the mandrel 220 and sheath 210 according to some embodiments of this specification.

[0224] Embodiment 3 of this specification provides a clamping device 10, which includes a spindle 220, a connecting end 221, and a sheath 210.

[0225] In some embodiments, the connecting end 221 includes a base segment 224 and an expanded diameter segment 225. The distal end of the expanded diameter segment 225 is connected to the proximal end of the base segment 224, and the proximal end of the expanded diameter segment 225 is connected to the distal end of the mandrel 220. The diameter of the expanded diameter segment 225 is larger than the diameter of the base segment 224. By providing the expanded diameter segment 225, the connection strength between the mandrel 220 and the connecting end 221 can be increased.

[0226] In some embodiments, the sheath 210 includes a distal tube segment 212 and a proximal tube segment 213. The inner diameter of the distal tube segment 212 is larger than the inner diameter of the proximal tube segment 213, and the axial length of the distal tube segment 212 is larger than the axial length of the connecting end 221. The connecting end 221 is axially movable within the distal tube segment 212. Because the connecting end 221 has an enlarged diameter section 225, the sheath 210 is provided with an enlarged inner diameter distal tube segment 212 to accommodate the connecting end 221, thereby enabling the connecting end 221 to move axially within the distal tube segment 212.

[0227] Figure 40 This is a schematic diagram of the structure of the sheath 210 according to some embodiments of this specification.

[0228] like Figure 40 As shown, in some embodiments, the distal pipe segment 212 includes a first pipe fitting, and the proximal pipe segment 213 includes a second pipe fitting. The proximal end of the first pipe fitting and the distal end of the second pipe fitting are directly connected, for example, by welding, bonding or other methods.

[0229] In some embodiments, the first fitting is a flat wire spring tube and the second fitting is a plastic-coated spring tube. The wall thickness of the flat wire spring tube is less than that of the plastic-coated spring tube. Under the premise that the outer diameters of the first fitting and the second fitting are equal, the inner diameter is enlarged.

[0230] Figure 41 This is a schematic diagram of the structure of the sheath 210 according to other embodiments of this specification.

[0231] like Figure 41 As shown, in some embodiments, the sheath 210 further includes a connecting tube 214, which is sleeved at the connection between the first and second pipe fittings for fixing the first and second pipe fittings. For example, the connecting tube 214 can connect the first and second pipe fittings by various methods such as welding, bonding, snap-fitting, or interference fit. By providing the connecting tube 214, the connection strength between the first and second pipe fittings can be improved.

[0232] Figure 42 This is a schematic diagram of the structure of the sheath 210 according to some embodiments of this specification.

[0233] like Figure 42 As shown, in some embodiments, the distal pipe segment 212 and the proximal pipe segment 213 are integrally formed, and the inner diameter of the connection area between the distal pipe segment 212 and the proximal pipe segment 213 gradually increases or increases in a stepwise manner from the proximal end to the distal end. The connection area between the distal pipe segment 212 and the proximal pipe segment 213 can be a region with a certain axial length between the two, or it can be the entire distal pipe segment 212.

[0234] Figure 43 This is a structural schematic diagram of the connection end 221 shown according to some embodiments of this specification.

[0235] like Figure 43As shown, in some embodiments, the clamping device 10 further includes a clamping arm 100, the proximal end of which includes a connecting snap-fit ​​140. The base segment 224 includes a guide head 222 and a limiting groove 223. The limiting groove 223 is located near the proximal end of the guide head 222, which guides the connecting end 221 through the connecting snap-fit ​​140. The limiting groove 223 and the connecting snap-fit ​​140 form a limiting engagement. Further examples of the clamping arm 100 and the connecting snap-fit ​​140 can be found in the descriptions of Embodiments 1 and 2.

[0236] In some embodiments, the shaft segment corresponding to the limiting groove 223 has a non-circular cross-section. For example, a plane is formed on the shaft segment corresponding to the limiting groove 223. In other embodiments, the shaft segment may also be polygonal prism-shaped. After the connecting buckle 140 engages with the limiting groove 223, the non-circular cross-section design enables the clamping arm 100 to rotate, increasing the reliability of the rotation.

[0237] In some embodiments, an annular groove 226 is provided on the base section 224 and / or the expanded diameter section 225. When the connecting end 221 moves within the sheath 210, the design of the annular groove 226 increases the turning capability of the connecting end 221, facilitating its movement through bends within the sheath 210. In other applications, where the sheath 210 needs to be transported into the body via an endoscope channel, the design of the annular groove 226 also enhances the ability of the connecting end 221 and the sheath 210 to pass through the endoscope channel together.

[0238] In some embodiments, the clamping device 10 further includes a clamping arm 100 and a receiving tube 101. A base section 224 is releasably connected to the proximal end of the clamping arm 100 within the receiving tube 101, and at least a portion of the diameter of the expanding section 225 is smaller than the inner diameter of the receiving tube 101. Thus, when the connecting end 221 enters the receiving tube 101, at least a portion of the connecting end 221 can maintain a gap with the inner diameter of the receiving tube 101, reducing the friction between the connecting end 221 and the receiving tube 101 and lowering operating resistance.

[0239] Embodiment 4 of this specification also provides an endoscope system, which includes the clamping device 10 as described in any of the above embodiments, and the endoscope system also includes an unlocking tool configured to unlock the clamping arm 100 and the receiving tube 101.

[0240] In some embodiments, the unlocking tool includes, but is not limited to, a snare, a clamp, etc.

[0241] Figure 44 This is a flowchart of the assembly method of the clamp device 10 according to some embodiments of this specification.

[0242] This specification also provides an assembly method for a clamp device 10, which is applied to the clamp device 10 described in any of the above embodiments. The clamp device 10 includes a receiving tube 101, a clamping arm 100, a sheath 210, and a mandrel 220. The proximal end of the clamping arm 100 includes a cantilever 130, and the receiving tube 101 includes a disassembly groove 570. The assembly method for the clamp device 10 in this specification includes a process 1000, which can be automatically executed by a tooling table, avoiding errors caused by manual assembly and saving time and effort.

[0243] Step 1010: Place the proximal end of the clamping arm 100 at the distal end of the storage tube 101, and adjust the central axis of the clamping arm 100 to be parallel to the central axis of the storage tube 101.

[0244] In some embodiments, on a tooling table, the tooling device places the proximal end of the clamping arm 100 against the distal end of the receiving tube 101 and adjusts their central axes to be approximately parallel. This approximately parallelism means that the central axis of the clamping arm 100 and the central axis of the receiving tube 101 are substantially parallel, allowing for slight deviations of a small angle, which can be adaptively adjusted according to actual assembly requirements. For example, a dedicated alignment tool can be used to assist in positioning when adjusting the central axes to be approximately parallel. This step ensures that the clamping arm 100 smoothly enters the receiving tube 101 during subsequent assembly.

[0245] In some embodiments, the receiving tube 101 includes an inner tube 400 and an outer tube 500. The side wall of the inner tube 400 is provided with a first positioning hole 460, and the side wall of the outer tube 500 is provided with a second positioning hole 530. Before the clamping arm 100 is assembled with the receiving tube 101, the assembly method further includes the following process:

[0246] First, the outer tube 500 is fitted onto the inner tube 400, and the first positioning hole 460 and the second positioning hole 530 are pre-aligned. For example, the tooling device positions one end of the outer tube 500 corresponding to one end of the inner tube 400, and adjusts the central axes of the inner tube 400 and the outer tube 500 to be nearly parallel. Next, the outer tube 500 and / or the inner tube 400 are rotated so that the directions of the first positioning hole 460 and the second positioning hole 530 are approximately the same. Then, the outer tube 500 and the inner tube 400 are brought closer together until the outer tube 500 is fitted onto the inner tube 400, and the axial displacement and / or circumferential displacement of the outer tube 500 are adjusted to pre-align the first positioning hole 460 and the second positioning hole 530. During pre-alignment, a certain positional deviation is allowed between the first positioning hole 460 and the second positioning hole 530.

[0247] Secondly, an external positioning shaft 600 is inserted into the first positioning hole 460 and the second positioning hole 530, so that the outer tube 500 is fitted into the inner tube 400 at a preset position. The preset position includes the relative position of the inner tube 400 and the outer tube 500 in the axial and circumferential directions. These relative positions can be determined based on the correspondence between the structures on the inner tube 400 and the structures on the outer tube 500.

[0248] It should be noted that when the receiving tube 101 includes only one fitting, the assembly of the inner tube 400 and the outer tube 500 can be omitted.

[0249] Step 1020: The cantilever 130 is compressed radially inward and deformed, and the clamping arm 100 and the receiving tube 101 are controlled to move relative to each other in a direction that brings them closer together, so that the proximal end of the clamping arm 100 enters the receiving tube 101 and forms an axial limiting fit.

[0250] In some embodiments, the cantilever 130 includes a tool contact surface 132 for engaging an external assembly tool. Under a radially inward force applied by the external assembly tool, the tool contact surface 132 causes the cantilever 130 to deform radially inward. On the tooling table, the assembly tool radially presses the tool contact surface 132 inward, causing the proximal ends of each cantilever 130 to converge, reducing the overall radial dimension to a level suitable for insertion into the receiving tube 101.

[0251] Next, the receiving tube 101 includes at least one elongated groove 410. After the proximal end of the clamping arm 100 enters the receiving tube 101, the cantilever 130 returns to its free state and forms an axial limiting engagement with the elongated groove 410.

[0252] Step 1030: Place the proximal end of the receiving tube 101 at the distal end of the sheath tube 210, and control the relative movement of the receiving tube 101 and the sheath tube 210 in a direction of mutual approach. After the receiving tube 101 and the sheath tube 210 are docked, they form an axial limiting fit.

[0253] In some embodiments, the clamping device 10 further includes a sheath 210, with a first connecting portion 420 at the proximal end of the receiving tube 101 and a second connecting portion 211 at the distal end of the sheath 210. The tooling device controls the first connecting portion 420 and the second connecting portion 211 to press against each other axially. The second connecting portion 211 actuates the first connecting portion 420 to undergo radially inward displacement. After the second connecting portion 211 passes over the first connecting portion 420, the first connecting portion 420 returns to its initial position and forms an axial limit with the second connecting portion 211. At this point, the receiving tube 101 and the sheath 210 stop moving. The entire process involves only a change in relative displacement, making assembly simple and efficient.

[0254] Step 1040: Control the spindle 220 to move to the distal end and releasably connect it to the proximal end of the clamping arm 100.

[0255] In some embodiments, the clamping device 10 further includes a mandrel 220 and a connecting end 221 disposed at the distal end of the mandrel 220. The connecting end 221 includes a guide head 222 and a limiting groove 223, and the proximal end of the clamping arm 100 includes a connecting snap 140. The tooling device first adjusts the position of the mating portion 110 of the clamping arm 100 to the distal end of the long groove 410 to resist the mating force applied by the mandrel 220 to the distal end. If the long groove 410 includes an assembly groove 411, the position of the mating portion 110 is adjusted into the assembly groove 411. Then, the tooling device controls the mandrel 220 to move to the distal end and presses the connecting snap 140 through the connecting end 221, causing the connecting snap 140 to deform axially or radially. Next, the tooling equipment continues to control the spindle 220 to move to the far end, so that the guide head 222 of the connecting end 221 passes over the connecting buckle 140. After the connecting buckle 140 returns to its free state, it forms an axial limiting engagement with the limiting groove 223.

[0256] Figure 45 This is a flowchart illustrating the operation method of the clamping device 10 according to some embodiments of this specification.

[0257] This specification also provides an operating method for a clamping device 10, applicable to the clamping device 10 as described in any of the above embodiments, and applicable to the endoscope system as described in the above embodiments. In some embodiments, the clamping device 10 includes a clamping arm 100, a receiving tube 101, a sheath 210, and a spindle 220. The receiving tube 101 is releasably connected to the sheath 210. The proximal end of the clamping arm 100 is axially movable within the receiving tube 101. The spindle 220 is releasably connected to the clamping arm 100. The operating method of the clamping device 10 includes a process 2000, which can be executed by an operator through an operating unit 300.

[0258] Step 2010: Control the spindle 220 to move to the distal end, drive the clamping arm 100 to extend the storage tube 101 to the distal end and put it in an open state.

[0259] In some embodiments, the clamping arm 100 includes a mating portion 110, and the receiving tube 101 includes an elongated groove 410, which includes a sliding groove 412. The mating portion 110 of the clamping arm 100 can slide along the sliding groove 412. The operator controls the spindle 220 to move distally via the operating handle of the operating unit 300, driving the clamping arm 100 to move distally relative to the receiving tube 101. The mating portion 110 of the clamping arm 100 then moves distally relative to the sliding groove 412. When the mating portion 110 reaches its distal limit position, the clamping arm 100 opens. The distal limit position refers to the position where the clamping arm 100 cannot continue to move distally even under force. This position can be the distal end of the sliding groove 412 or a position that is a certain distance away from the distal end of the sliding groove 412.

[0260] Step 2020: Control the spindle 220 to move towards the proximal end, drive the proximal end of the clamping arm 100 to retract the receiving tube 101 and put it into a closed state.

[0261] In some embodiments, the operator controls the mandrel 220 to move proximally via the operating handle of the operating unit 300, driving the clamping arm 100 to retract the receiving tube 101 proximally, and the mating part 110 moves to the proximity of the sliding groove 412, closing the clamping arm 100. When the operator feels feedback resistance when pulling the mandrel 220 proximally, it indicates that the clamping arm 100 has reached the extreme closed position, where the mating part 110 of the clamping arm 100 abuts against the contact surface 103520 to form feedback resistance. At this time, the operator can select subsequent operating methods as needed, such as controlling the mandrel 220 to move distally to open the clamping arm 100 again, or controlling the mandrel 220 to continue moving proximally to lock the clamping arm 100.

[0262] Step 2030: Control the spindle 220 to move proximally, drive the clamping arm 100 to move proximally, and trigger the storage tube 101 to deform radially inward, causing the clamping arm 100 to lock with the storage tube 101 and the storage tube 101 to release with the sheath 210.

[0263] In some embodiments, the outer wall of the inner tube 400 is provided with a trigger protrusion 430, and the first connecting portion 420 of the receiving tube 101 and the second connecting portion 211 of the sheath tube 210 are releasably connected. In some embodiments, the operator controls the mandrel 220 to move proximally through the operating handle of the operating part 300. The mandrel 220 drives the clamping arm 100 to move proximally, and the mating part 110 drives the release ring 102 or the outer tube 500 to move proximally. When the release ring 102 or the outer tube 500 moves to the operating position, the release ring 102 or the outer tube 500 causes the inner tube 400 to deform or displace radially inward by squeezing the trigger protrusion 430, which drives the first connecting portion 420 to move radially inward. The first connecting portion 420 and the second connecting portion 211 are disengaged, and the receiving tube 101 and the sheath tube 210 are released.

[0264] In some embodiments, the receiving tube 101 includes an elongated groove 410, which includes a sliding groove 412 and a locking groove 413. After the mating portion 110 of the clamping arm 100 enters the locking groove 413, it drives the release ring 102 or the outer tube 500 to move proximally. When the release ring 102 or the outer tube 500 causes the inner tube 400 to deform or displace radially inward by squeezing the trigger protrusion 430, the width of the proximity of the sliding groove 412 decreases and restricts the movement of the mating portion 110 to the distal end, thus locking the clamping arm 100 with the receiving tube 101.

[0265] In step 2040, after the clamping arm 100 and the storage tube 101 are locked, the clamping arm 100 and the storage tube 101 form an axial limit, and a pulling force towards the proximal end is applied to the spindle 220, so that the spindle 220 and the clamping arm 100 are released.

[0266] In some embodiments, a connecting buckle 140 is provided on the cantilever 130 of the clamping arm 100. The clamping device 10 includes a spindle 220 and a connecting end 221 located at the distal end of the spindle 220. The connecting buckle 140 and the connecting end 221 are releasably connected. For example, after the clamping arm 100 is locked with the receiving tube 101, when the operator continues to apply a force to the proximal end of the spindle 220 through the operating part 300, the clamping arm 100 is stopped by the receiving tube 101 and no longer moves proximally. Then, the tension between the connecting end 221 and the connecting buckle 140 increases. When the tension increases to a force threshold, the connecting end 221 actuates the cantilever 130 to deform or displace radially outward, or actuates the connecting buckle 140 to directly undergo elastic or plastic deformation, and the connecting end 221 and the connecting buckle 140 are released. At this point, the clamping arm 100 and the storage tube 101 are released as a whole and remain at the wound site, while the spindle 220 retracts into the sheath 210.

[0267] In some application scenarios, if the operator finds that the clamping arm 100 is not properly positioned at the wound or has not effectively closed the wound, the clamping arm 100 can be unlocked using the external unlocking tool 700 to allow for free disassembly. This facilitates the operator's subsequent operations, timely correction of surgical errors, and improvement of surgical success rate.

[0268] In some embodiments, the receiving tube 101 includes a disassembly groove 570, and the clamping arm 100 further includes a cantilever 130. When the clamping arm 100 is locked to the receiving tube 101, at least a portion of the cantilever 130 corresponds to the position of the disassembly groove 570. After the spindle 220 is released from the clamping arm 100, the clamping arm 100 can also be unlocked using an unlocking tool. The operation method further includes the following process:

[0269] First, the external unlocking tool 700 is passed through the disassembly slot 570 and engaged with the cantilever 130. For example, the external unlocking tool 700 may include, but is not limited to, a snare or a clamp. The external unlocking tool 700 is then transported to the clamp arm 100 position via the endoscope channel, and its working end is controlled to enter the disassembly slot 570. Taking a snare as an example, the snare is directly fitted onto the outer wall of the receiving tube 101, corresponding to the disassembly slot 570.

[0270] Next, an external unlocking tool 700 applies a radially inward force to the cantilever 130, causing the cantilever 130 to deform radially inward and unlock from the receiving tube 101. For example, the cantilever 130 is provided with a mating part 110, which mates with the snare to increase the reliability of disassembly.

[0271] Finally, under the action of its bending action section, the clamp arm 100 moves to the distal end, and the clamp arm 100 reopens.

[0272] In some other embodiments, the receiving tube 101 includes an inner tube 400 and an outer tube 500. The outer tube 500 is axially movable and sleeved outside the inner tube 400. The side wall of the inner tube 400 is provided with a trigger protrusion 430, and the side wall of the outer tube 500 is provided with a spring piece 540 and a clearance hole 510. When the spring piece 540 engages with the second limiting hole 450 of the inner tube 400, the inner tube 400 and the outer tube 500 are axially limited. After the mandrel 220 is released from the clamping arm 100, another unlocking operation can be performed on the clamping arm 100 using an unlocking tool. The operation method also includes the following process:

[0273] First, the external unlocking tool 700 is engaged with the spring 540. For example, the external unlocking tool 700 may be a tool such as a clamp. For example, the external unlocking tool 700 is controlled to align or abut against the outer surface of the spring 540; for example, the external unlocking tool 700 is controlled to abut against the distal end of the spring 540. Another example is that the external unlocking tool 700 is controlled to abut against the proximal end of the spring 540.

[0274] Next, the external unlocking tool 700 applies a radially inward force to the spring piece 540, causing the spring piece 540 to deform radially inward or outward and disengage from the second limiting hole 450. For example, when the external unlocking tool 700 abuts against the distal end of the spring piece 540, the radially inward force can press the spring piece 540 inward, disengaging it from the second limiting hole 450. For example, when the external unlocking tool 700 abuts against the proximal end of the spring piece 540, the radially inward force can press the spring piece 540 outward, disengaging it from the second limiting hole 450.

[0275] Then, under the force of the inner tube 400, the outer tube 500 is driven to move to the distal end until the trigger protrusion 430 enters the clearance hole 510, the inner tube 400 returns to its natural state, and the clamping arm 100 and the storage tube 101 are unlocked. For example, since the trigger protrusion 430 of the inner tube 400 gradually protrudes from the distal end to the proximal end of the inner tube 400, after the spring piece 540 releases its contact with the distal end of the second limiting hole 450, the inner tube 400, in the process of returning to its natural state, actuates the outer tube 500 to move to the distal end through the trigger protrusion 430, the sliding groove 412 and the mating part 110 are released from restriction, and the clamping arm 100 and the storage tube 101 are unlocked.

[0276] Finally, under the action of its bending action section, the clamp arm 100 moves to the distal end, and the clamp arm 100 reopens.

[0277] The beneficial effects that the embodiments of this application may bring include, but are not limited to:

[0278] (1) A tool contact surface is provided on the clamping arm so that the external tool can cooperate with the mating part of the cantilever, making it convenient to use the external tool to perform operations on the cantilever (such as assembly or unlocking), solving the problems of assembly error and low efficiency caused by manual operation, and improving assembly accuracy and production efficiency.

[0279] (2) After the clamping arm is assembled with the storage tube, the long groove ensures that the clamping arm can only move along the axial direction of the storage tube and effectively limits the maximum stroke of the clamping arm in the storage tube, ensuring that the position and direction of movement of the clamping arm can be precisely controlled during operation.

[0280] (3) A disassembly groove is provided on the side wall of the storage tube to facilitate unlocking after the clamp arm is locked, so as to adjust or remove the clamp arm and enhance the fault tolerance of the clamping device.

[0281] (4) The stop plate at the far end of the receiving tube is arranged at an angle relative to the end face of the far end of the receiving tube. The angle causes the stop plate to protrude from the far end of the receiving tube, thereby increasing the travel of the clamping arm to the far end.

[0282] (5) Setting a center hole on the stop plate can increase the travel of the clamping arm to the far end, thereby increasing the span between at least two clamping plates.

[0283] (6) When the clamping arm moves to the closed limit position near the proximal end, at least part of the mating part is located in the sliding groove to avoid self-locking after the mating part leaves the sliding groove.

[0284] (7) The release of the receiving tube and sheath is facilitated by releasing the release ring or the outer tube, which helps to simplify the structure and improve the control accuracy.

[0285] (8) When the mating part and the near end of the sliding groove form a limiting fit, the near end of the mating part and the contact surface of the release ring are arranged with a gap. This gap design can ensure that the release ring can actuate the inner tube to deform radially inward after the mating part is completely away from the sliding groove, thus avoiding the situation of being unable to lock or locking failure, and improving the locking reliability.

[0286] (9) The tool contact surface is provided with an anti-slip structure. When the tool contact surface and the external unlocking tool are in contact, the anti-slip structure can increase the contact friction between the two, prevent the external unlocking tool from slipping during the unlocking process, and improve the success rate of disassembly.

[0287] (10) The effective axial dimension of the disassembly slot is greater than the mating dimension of the external unlocking tool to allow the external unlocking tool to enter the disassembly slot smoothly. The difference between the axial dimension of the tool contact surface and the effective axial dimension of the disassembly slot is less than half of the mating dimension of the external unlocking tool, which prevents the working end of the external unlocking tool from falling into the gap between the mating part and the release ring, thereby improving the reliability and success rate of disassembly.

[0288] (11) The connecting end includes a base section and an enlarged diameter section. The diameter of the enlarged diameter section is larger than that of the base section. By setting the enlarged diameter section, the connection strength between the mandrel and the connecting end can be increased.

[0289] (12) The shaft segment corresponding to the limiting groove of the connecting end has a non-circular cross section, which increases the reliability of the connecting end driving the clamping arm to rotate. An annular groove is provided on the base section and / or the expanded diameter section of the connecting end. The design of the annular groove can increase the turning ability of the connecting end and facilitate the connecting end to bend inside the sheath. At least part of the diameter of the expanded diameter section is smaller than the inner diameter of the receiving tube, which helps to reduce the friction between the connecting end and the receiving tube and reduce the operating resistance.

[0290] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0291] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0292] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0293] Similarly, it should be noted that, in order to simplify the descriptions disclosed herein and thus aid in the understanding of one or more embodiments, the foregoing description of embodiments in this specification sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0294] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0295] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A clamping device, characterized in that, include: A storage tube, the sidewall of which is formed with at least one elongated groove extending axially and a disassembly groove extending circumferentially. The clamping arm includes at least two clamping plates whose proximal ends are fixedly connected. The proximal end of the clamping arm is axially movable within the receiving tube. The clamping arm also includes a cantilever, one end of which is connected to the proximal end of the clamping plate, and the other end extends along the central axis of the at least two clamping plates. The proximal end of the cantilever includes a mating part that movably engages with the elongated groove. The mating part corresponds to the position of the disassembly groove, and when the cantilever deforms or displaces radially inward, the clamping arm and the receiving tube are unlocked.

2. The clamping device as described in claim 1, characterized in that, The receiving tube includes an inner tube, and the elongated groove is disposed on the side wall of the inner tube; The long groove includes a sliding groove and a locking groove. When the mating part engages with the sliding groove, the clamping arm switches between an open state and a closed state. When the mating part engages with the locking groove, the clamping arm locks with the storage tube.

3. The clamping device as described in claim 2, characterized in that, The storage tube includes an outer tube sleeved on the outside of the inner tube, and the disassembly groove is provided on the outer tube. The disassembly groove and the locking groove are arranged in corresponding positions. The mating part has a tool contact surface. After the clamping arm is locked with the storage tube, the tool contact surface is exposed from the disassembly groove. The tool contact surface is configured to cause the cantilever to deform or displace radially inward when subjected to a radially inward force, thereby disengaging from the locking groove and unlocking the clamping arm and the storage tube.

4. The clamping device as described in claim 3, characterized in that, The mating part is constructed as a bent structure, and at least a portion of the bent structure constitutes the tool contact surface, which is arranged radially outward.

5. The clamping device as described in claim 2, characterized in that, At least one of the disassembly slot and the locking slot includes a guide surface configured to guide the working end of an external unlocking tool to the tool contact surface.

6. The clamping device as described in claim 3, characterized in that, The inner tube and the outer tube are fixedly connected, and the outer wall of the inner tube is provided with a trigger protrusion; the clamping device also includes a release ring, which is axially movable and sleeved on the outside of the inner tube; the release ring includes an initial position and an operating position: In the initial position, the release ring is located on the distal side of the trigger protrusion, and the inner tube is in its natural state; During the process of the mating part moving from the sliding groove into the locking groove, the mating part drives the release ring to move towards the proximal end. When the release ring moves to the operating position, the trigger protrusion is located inside the release ring. The release ring triggers the cantilever to deform radially inward through the trigger protrusion. The width of the sliding groove decreases to restrict the movement of the mating part towards the distal end, and the clamping arm locks with the storage tube.

7. The clamping device as described in claim 3, characterized in that, The outer tube is axially movable and sleeved on the outside of the inner tube; the outer wall of the inner tube is provided with a trigger protrusion; the side wall of the outer tube is provided with a clearance hole; the outer tube includes an initial position and an operating position. In the initial position, the trigger protrusion is located within the clearance hole, and the inner tube is in its natural state; During the process of the mating part moving from the sliding groove into the locking groove, the mating part drives the outer tube to move towards the proximal end. When the outer tube moves to the operating position, the trigger protrusion is located inside the outer tube. The outer tube triggers the cantilever to deform radially inward through the trigger protrusion. The width of the sliding groove is reduced to restrict the mating part from moving towards the distal end, and the clamping arm locks with the storage tube.

8. The clamping device as described in claim 7, characterized in that, One of the inner tube and the outer tube includes a spring plate, and the other includes a first limiting hole and a second limiting hole. When the outer tube is in the initial position, the spring plate cooperates with the first limiting hole to axially limit the outer tube with the inner tube in the initial position. When the outer tube is in the operating position, the spring plate cooperates with the second limiting hole to axially limit the outer tube with the inner tube in the operating position.

9. The clamping device as described in claim 8, characterized in that, The first limiting hole and the second limiting hole are connected, and a stop arm is formed between the first limiting hole and the second limiting hole. The driving force F required for the mating part to drive the outer tube to move to the proximal end is determined based on the length L5 of the stop arm. The length L5 of the stop arm is configured such that the driving force F required to control the movement of the outer tube toward the proximal end is in the range of 30N to 80N.

10. The clamping device as described in claim 8, characterized in that, The trigger protrusion gradually protrudes from the distal end to the proximal end of the inner tube's side wall; The spring includes a hook and an extension. The proximal end of the extension is fixed to the outer tube, and the hook is located at the distal end of the extension. The hook engages with the second limiting hole. The spring is also used to receive an external unlocking tool. Under the action of the external unlocking tool, after the extension of the spring deforms radially inward or outward, the outer tube and the inner tube are released from axial restriction. The inner tube actuates the outer tube to move to the distal end via the trigger convex, the sliding groove and the mating part are released from restriction, and the clamping arm is unlocked from the storage tube.

11. The clamping device as described in claim 2, characterized in that, The clamping device includes an outer tube that is axially movable and sleeved on the outside of the inner tube; or, the clamping device includes a release ring that is axially movable and sleeved on the outside of the inner tube. A contact surface is formed in the disassembly groove of the outer tube, and the sidewall of the proximal end of the outer tube is recessed inward, so that the contact surface protrudes inward in the radial direction; or, the distal end face of the release ring constitutes the contact surface. When the mating part enters the locking groove, the mating part abuts against the contact surface, causing the mating part to drive the outer tube or release ring to move towards the proximal end.

12. The clamping device as described in claim 11, characterized in that, When the mating part forms a limiting fit with the proximal end of the sliding groove, the proximal end of the mating part is arranged with a gap from the contact surface.

13. The clamping device as described in claim 6 or 7, characterized in that, The clamp device also includes a sheath, with a first connecting part at the proximal end of the inner tube and a second connecting part at the distal end of the sheath. The first connecting part and the second connecting part are releasably connected. When the release ring or the outer tube engages with the trigger protrusion, the inner tube drives the first connecting part to move radially inward, the first connecting part and the second connecting part disengage, and the receiving tube is released from the sheath.

14. The clamping device as described in claim 6 or 7, characterized in that, The clamping arm also includes a connecting buckle located at the proximal end of the clamping plate. The clamping device also includes a spindle and a connecting end located at the distal end of the spindle. The connecting end is releasably connected to the connecting buckle.

15. The clamping device as described in claim 14, characterized in that, A stop is provided in the middle of the clamping plate. When the outer tube or the release ring actuates the trigger protrusion, the stop and the distal end of the receiving tube form a limit, restricting the movement of the clamping arm to the proximal end.

16. The clamping device as described in claim 15, characterized in that, After the stop portion and the far end of the receiving tube form a limit, the core axis moves to the near end, and the connecting buckle deforms along the axial or radial direction, causing the connecting end to disengage from the connecting buckle and the connecting end to release from the clamping arm.

17. A clamping device, characterized in that, include: A storage tube, wherein at least one elongated groove extending axially is formed on the sidewall of the storage tube; The clamping arm includes at least two clamping plates whose proximal ends are fixedly connected; the clamping arm also includes a cantilever, one end of which is connected to the proximal end of the clamping plates, and the other end of which extends along the central axis of the at least two clamping plates; the proximal end of the cantilever includes a mating portion having a tool contact surface configured such that, when subjected to a radially inward force, the proximal end of the cantilever deforms radially inward to allow entry into the channel of the receiving tube; after the cantilever returns to its free state, the mating portion movably engages with the elongated groove.

18. The clamping device as described in claim 17, characterized in that, The mating part is constructed as a bent structure, and at least a portion of the bent structure constitutes the tool contact surface, which is arranged radially outward.

19. The clamping device as described in claim 17, characterized in that, The storage tube includes an inner tube and an outer tube. The inner tube has a first positioning hole on its side wall, and the outer tube has a second positioning hole on its side wall. The first positioning hole and the second positioning hole have the same shape and size. When the first positioning hole and the second positioning hole are connected to the external positioning shaft, the outer tube is sleeved at a preset position on the inner tube.

20. The clamping device as described in claim 17, characterized in that, The clamp device also includes a sheath, with a first connecting part at the proximal end of the receiving tube and a second connecting part at the distal end of the sheath. When the first connecting part and the second connecting part approach each other axially, the second connecting part causes the first connecting part to undergo radial inward displacement. After the second connecting part passes the first connecting part, the first connecting part returns to its initial position and forms an axial limit with the second connecting part.

21. The clamping device as described in claim 20, characterized in that, The first connecting part is constructed as a connecting protrusion, which protrudes from the outer wall of the receiving tube; the second connecting part is constructed as a limiting ring protruding from the inner wall of the sheath. The proximal end of the connecting protrusion has a guide surface, which is used to guide the limiting ring over the connecting protrusion.

22. The clamping device as described in claim 17, characterized in that, The clamping arm also includes a connecting buckle located at the proximal end of the clamping plate. The clamping device also includes a spindle and a connecting end located at the distal end of the spindle. The connecting end is releasably connected to the connecting buckle.

23. The clamping device as described in claim 22, characterized in that, The clamping arm includes a fixing part, and the at least two clamping pieces are fixed by the fixing part. A hollow channel is formed in the middle of the fixing part, and the connecting buckle is disposed in the hollow channel.

24. The clamping device as described in claim 23, characterized in that, The connecting buckle includes at least two buckle pieces. One side of each buckle piece is fixed to the fixing part, and the other side extends radially inward. A through hole is formed between the at least two buckle pieces to engage the connecting end. The distal end of the connecting end includes a limiting groove. When the buckle piece is deformed or displaced under force, it engages or disengages from the limiting groove.

25. The clamping device as described in claim 22, characterized in that, The clamping arm includes a fixing part, the at least two clamping pieces are fixed by the fixing part, and the cantilever is connected to the proximal end of the fixing part; The connecting buckle includes a first limiting structure and a second limiting structure. The first limiting structure is disposed on the cantilever, and the second limiting structure is disposed on the cantilever or the fixing part. The first limiting structure and the second limiting structure form a channel for fastening the connecting end.

26. The clamping device as described in claim 25, characterized in that, The clamping arm includes at least two cantilever arms. The middle part of the cantilever arm is constructed as a radially inward bending structure. The bending structure is constructed as a first limiting structure. The distal end of the connecting end includes a limiting groove. When the first limiting structure is deformed or displaced under force, the first limiting structure engages with or disengages from the limiting groove. The second limiting structure is constructed as a protrusion, which protrudes axially from the proximal end of the fixing piece, or protrudes from the side of the cantilever toward the adjacent cantilever; when the connecting end is engaged with the connecting buckle, the second limiting structure restricts the lateral displacement of the connecting end.

27. The clamping device as described in claim 22, characterized in that, The distal end of the long groove is formed with an increased width of the assembly groove. When the mating part mates with the assembly groove, the assembly groove allows the cantilever to deform under force, thereby increasing the channel size of the connecting buckle, so that the connecting end can be snapped into the connecting buckle.

28. The clamping device as described in claim 27, characterized in that, The long groove includes a sliding groove, and a stop protrusion is formed on the mating part. When the mating part is engaged with the sliding groove, the stop protrusion slides in contact with the inner wall of the receiving tube to limit the deformation of the cantilever bending structure.

29. The clamping device as described in claim 22, characterized in that, A stop plate is provided at the distal end of the receiving tube. The stop plate blocks between the at least two clamping plates to limit the extreme position of the clamping arm moving to the distal end. The angle between the stop plate and the axis of the receiving tube is in the range of 50° to 90°.

30. The clamping device as described in claim 29, characterized in that, The connecting end includes a guide head located at the distal end, and the stop plate has a central hole. When the connecting end contacts the stop plate, at least a portion of the guide head extends out from the central hole.

31. A clamping device, characterized in that, include: mandrel; The connecting end includes a base section and an enlarged diameter section, the distal end of the enlarged diameter section is connected to the proximal end of the base section, the proximal end of the enlarged diameter section is connected to the distal end of the mandrel, and the diameter of the enlarged diameter section is larger than the diameter of the base section. The sheath includes a distal tube segment and a proximal tube segment, wherein the inner diameter of the distal tube segment is larger than the inner diameter of the proximal tube segment, and the axial length of the distal tube segment is greater than the axial length of the connecting end, and the connecting end is axially movable within the distal tube segment.

32. The clamping device as described in claim 31, characterized in that, The distal pipe section includes a first pipe fitting, and the proximal pipe section includes a second pipe fitting, wherein the proximal end of the first pipe fitting is directly connected to the distal end of the second pipe fitting. or, The sheath also includes a connecting tube, which is sleeved at the connection between the first pipe fitting and the second pipe fitting, and is used to fix the first pipe fitting and the second pipe fitting.

33. The clamping device as described in claim 31, characterized in that, The distal pipe section and the proximal pipe section are integrally formed, and the inner diameter of the connection area between the distal pipe section and the proximal pipe section gradually increases from the proximal end to the distal end or increases in a stepwise manner.

34. The clamping device as described in claim 31, characterized in that, The clamping device further includes a clamping arm, the proximal end of which includes a connecting buckle, and the base section includes a guide head and a limiting groove. The limiting groove is located at the proximal end of the guide head, and the guide head is used to guide the connecting end through the connecting buckle. The limiting groove and the connecting buckle form a limiting engagement. The shaft segment corresponding to the limiting groove has a non-circular cross section.

35. The clamping device as described in claim 31, characterized in that, An annular groove is provided on the base section and / or the expanded diameter section.

36. The clamping device as described in claim 31, characterized in that, The clamp device also includes a clamping arm and a receiving tube, wherein the base section is releasably connected to the proximal end of the clamping arm within the receiving tube, and at least a portion of the diameter of the expanded section is smaller than the inner diameter of the receiving tube.

37. An endoscope system, characterized in that, The endoscope system includes a clamping instrument as described in any one of claims 1-36, and the endoscope system further includes an unlocking tool configured to release the clamping arm and the receiving tube from locking.

38. A method for assembling a clamping device, characterized in that, The assembly method is applied to a clamp device as described in any one of claims 1-36, the clamp device comprising a receiving tube, a clamp arm, a sheath, and a mandrel, the proximal end of the clamp arm comprising a cantilever, the receiving tube comprising a disassembly groove, and the assembly method comprising: Place the proximal end of the clamping arm at the distal end of the storage tube, and adjust the central axis of the clamping arm to be parallel to the central axis of the storage tube. The cantilever is compressed radially inward and deformed, and the clamping arm and the receiving tube are controlled to move relative to each other in a direction that brings them closer together, so that the proximal end of the clamping arm enters the receiving tube and forms an axial limiting fit. The proximal end of the receiving tube is placed at the distal end of the sheath tube, and the receiving tube and the sheath tube are controlled to move relative to each other in a direction of mutual approach. After the receiving tube and the sheath tube are docked, an axial limiting fit is formed. The mandrel is controlled to move distally and releasably connect to proximal end of the clamping arm.

39. A method for operating a clamping device, characterized in that, The operating method is applied to the clamping instrument as described in any one of claims 1-36, and to the endoscope system as described in claim 37; The clamp device includes a clamping arm, a storage tube, a sheath, and a mandrel. The storage tube is releasably connected to the sheath. The proximal end of the clamping arm is axially movable within the storage tube. The mandrel is releasably connected to the clamping arm. The operating method includes: Control the movement of the mandrel to the distal end, drive the clamping arm to extend the storage tube to the distal end and put it in an open state; Control the movement of the mandrel to its proximal end, drive the proximal end of the clamping arm to retract the receiving tube and close it; Controlling the movement of the mandrel to its proximal end drives the movement of the proximal end of the clamping arm and triggers the radial inward deformation of the receiving tube, causing the clamping arm to lock with the receiving tube and the receiving tube to release from the sheath. After the clamping arm is locked to the storage tube, the clamping arm and the storage tube form an axial limit, and a pulling force is applied to the mandrel toward the proximal end, so that the mandrel and the clamping arm are released.

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