Clamping instrument

Abstract

The invention relates to a clamping instrument which comprises a clamp device, the clamp device comprises a storage pipe, a lining and a clamping assembly, the lining is arranged in the storage pipe, and the lining comprises a buckling part used for detachably connecting the lining and the storage pipe; and the locking part is used for locking the clamping assembly. According to the clamping instrument, stable locking can be achieved so that stable hemostasis can be achieved, and locking can be efficiently relieved when necessary so that the operation safety can be improved.

Description

This application claims priority of patent with application date of June 28, 2023 and application number 2023107782776, and incorporates all contents of the priority document into this application. Technical Field

[0001] The present specification relates to the field of medical devices, and in particular to a clamping device. Background Art

[0002] The stomach and intestines of organisms often bleed due to various diseases or accidental injuries or injuries after endoscopic treatment. Active bleeding can be treated by methods such as mechanical compression hemostasis with hemostatic clips. Among them, mechanical compression hemostasis with hemostatic clips is reliable for the treatment of active bleeding caused by non-varicose veins, and has been widely recognized by doctors and patients; the method of mechanical compression hemostasis with clips can close the digestive tract mucosal damage or digestive tract perforation to a certain extent, and promote wound healing. CN103930051B discloses a hemostatic clip with a locking structure at the tail of the clip. After the hemostatic clip is released, the tails of the two clips open and lock on the tightening tube, but the locking of this hemostatic clip is unstable and it is easy to fall off from the tissue to be clamped, causing medical accidents. Although the hemostatic clip can be unlocked from the patient's body when necessary, its unlocking success rate is low.

[0003] Therefore, it is necessary to provide a clamp device that can achieve stable locking during use and can efficiently release the lock when necessary. Summary of the invention

[0004] One embodiment of the present specification provides a clamping device, including: a clamp device, the clamp device includes a storage tube, a liner and a clamping assembly, the liner is arranged inside the storage tube, and the liner includes:

[0005] The buckle part is used to detachably connect the liner and the storage tube; the locking part is used to lock the clamping assembly; wherein the buckle part and the locking part are located at different circumferential positions relative to the storage tube. The buckle part and the locking part are separately arranged relative to the storage tube circumference, and the locking part does not affect the buckling state of the buckle part when locking the clamping assembly, so as to maintain the connection stability between the liner and the storage tube. At the same time, when the buckle part is operated to disassemble the liner and the storage tube, the locking part does not affect the disassembly of the buckle part, so as to ensure that the disassembly process is smooth and lossless, and reduce the risk of surgery.

[0006] In some embodiments, the clamping assembly includes a locked portion, and when the liner is connected to the receiving tube and the locking portion cooperates with the locked portion, the clamping device is locked; when the connection between the liner and the receiving tube is released, the clamping device is unlocked. The locked portion is used to cooperate with the locking portion to limit the movement of the clamping assembly from the proximal end to the distal end, and when the connection between the liner and the receiving tube is released, the liner can move axially relative to the receiving tube, driving the clamping assembly to move from the proximal end to the distal end.

[0007] In some embodiments, the locking portion includes at least one spring sheet, a distal end of the spring sheet is connected to the liner, and a proximal end of the spring sheet extends into the interior of the liner.

[0008] In some embodiments, the clamping assembly includes a first clamp arm, a second clamp arm and a pin, and the proximal end of the first clamp arm and the proximal end of the second clamp arm are connected by the pin; the radial end of the pin constitutes the locked portion, and the pin is configured to cooperate with the locking portion when passing over the locking portion from the distal end to the proximal end.

[0009] In some embodiments, the storage tube includes a snap-fit ​​portion, the snap-fit ​​portion cooperates with the snap-fit ​​portion, and the liner is connected to the storage tube. The snap-fit ​​portion includes but is not limited to a groove, a through hole, a protrusion, etc.; the snap-fit ​​portion includes but is not limited to a protrusion, a hook, a groove, etc.

[0010] In some embodiments, the storage tube includes a disassembly portion, the disassembly portion includes at least one slot formed on the side wall of the storage tube, and the buckle portion is at least partially disposed inside the slot, that is, a portion of the buckle portion corresponding to the slot position can be exposed from the slot.

[0011] In some embodiments, the opening area of ​​the disassembly portion is larger than the opening area of ​​the locking portion.

[0012] In some embodiments, the locking portion includes at least one hanging hole formed on the side wall of the storage tube, and the buckle portion includes at least one clamping arm and at least one protrusion, the proximal end of the clamping arm is a fixed end, and the distal end of the clamping arm is a free end, and the protrusion is arranged at the distal end of the clamping arm, and the at least one protrusion is detachably matched with the at least one hanging hole, and the slot hole at least partially exposes the clamping arm.

[0013] In some embodiments, the proximal end of the storage tube includes a limiting structure, and the limiting structure is configured to prevent the liner from escaping from the storage tube.

[0014] In some embodiments, the storage tube includes an inner tube and an outer tube, at least a portion of the distal end of the inner tube is fixed to the inner side of the proximal end of the outer tube, the distal end of the inner tube constitutes the limiting structure, and the outer diameter of the liner is greater than the inner diameter of the inner tube. The limiting structure also includes but is not limited to a protrusion, a baffle, and other structures provided at the distal end of the inner tube.

[0015] In some embodiments, a blocking structure is provided on the inner tube, the blocking structure protrudes radially inward relative to the inner wall of the inner tube, and the blocking structure is configured to limit the movement of the clamping assembly from the distal end to the proximal end.

[0016] In some embodiments, the clamping device also includes a conveying device, which includes a sheath and a core shaft moving in the sheath channel. The core shaft is releasably connected to the clamping assembly, and the movement of the core shaft from the distal end to the proximal end drives the clamping assembly to move from the distal end to the proximal end relative to the receiving tube.

[0017] In some embodiments, the storage tube includes a first connecting structure, and the conveying device also includes a second connecting structure. The first connecting structure cooperates with the second connecting structure, and the conveying device is connected to the clamp device. The first connecting structure is separated from the second connecting structure, and the connection between the conveying device and the clamp device is released; the conveying device includes an end cover, and the proximal end of the end cover is connected to the distal end of the sheath tube. The outer wall of the proximal end of the storage tube is formed with a step that is radially recessed inward, and the first connecting structure is arranged at the proximal end of the step. The distal end of the end cover abuts against the turning point of the step, and the first connecting structure is located inside the end cover.

[0018] In some embodiments, the delivery device further includes a handle, the handle includes a fixed portion and a sliding portion, the sliding portion is movable relative to the fixed portion, the fixed portion is disposed at the proximal end of the sheath, the sliding portion is connected to the core shaft, and the movement of the sliding portion drives the core shaft to move axially along the sheath; the core shaft further includes a guide tube, the proximal end of the guide tube is L-shaped, and the proximal end of the guide tube is fixedly connected to the sliding portion. The proximal end of the guide tube cooperates with the sliding portion through the L-shaped structure to limit the axial displacement of the guide tube and the sliding portion, and keep the guide tube and the sliding portion moving synchronously.

[0019] In some embodiments, the core shaft includes a connecting piece, a connecting tube and a connecting wire, the distal end of the connecting wire is fixed to the proximal end of the connecting tube, the proximal end of the connecting piece is inserted into the distal end of the connecting tube, and the distal end of the connecting piece is releasably connected to the pin shaft.

[0020] In some embodiments, a hook is formed at the distal end of the connecting piece, the hook cooperates with the pin shaft, and the hook is configured to be released from the pin shaft after being deformed or broken by force.

[0021] In some embodiments, after the pin passes over the locking portion, it continues to move until it abuts against the blocking structure, and the blocking structure restricts the clamping assembly from moving from the distal end to the proximal end.

[0022] In some embodiments, the clamp device also includes a blocking device, which is radially cross-arranged with the pin shaft. After the pin shaft passes over the locking portion, it continues to move until the blocking device abuts against the blocking structure, and the blocking structure limits the movement of the clamping assembly from the distal end to the proximal end.

[0023] In some embodiments, after the blocking structure restricts the clamping assembly from moving from the distal end to the proximal end, the distal end of the connecting piece is deformed or broken by force and the connection with the pin is released.

[0024] In some embodiments, the second connecting structure is disposed at the distal end of the core shaft, and the core shaft continues to move after the connection with the clamping assembly is released, driving the second connecting structure to move, so that the second connecting structure is deformed or broken by force and separated from the first connecting structure, and the connection between the second connecting structure and the first connecting structure is released.

[0025] In some embodiments, the first connection structure includes a recessed portion disposed at the proximal end of the storage tube, and the second connection structure includes a convex portion, the convex portion cooperates with the recessed portion, the first connection structure and the second connection structure are connected, the convex portion is deformed or broken by force and falls out of the recessed portion, and the first connection structure and the second connection structure are separated.

[0026] In some embodiments, the second connecting structure includes a connecting ring and at least one connecting arm, the connecting ring is connected to the core shaft, the proximal end of the connecting arm is fixed to the connecting ring, and the protrusion is arranged at the distal end of the connecting arm.

[0027] In some embodiments, the connecting ring is sleeved on the outside of the connecting tube, the proximal end of the connecting piece includes a bending portion, and the inner diameter of the distal end of the connecting ring is smaller than the radial dimension of the bending portion.

[0028] In some embodiments, the storage tube includes an inner tube and an outer tube, the inner tube is fixed to the inner side of the proximal end of the outer tube, the inner tube at least partially extends out of the proximal end of the outer tube, the first connecting structure is arranged on the part of the inner tube extending out of the outer tube, and the end cap abuts against the proximal end of the outer tube.

[0029] In some embodiments, a limiting protrusion protruding radially inward is provided at the distal end of the end cover, and the limiting protrusion is provided between the step and the first connecting structure.

[0030] In some embodiments, the clamping device further includes a disassembly device, which is configured to pass through the slot to squeeze the buckle portion inward, and release the buckle portion from the engaging portion, thereby releasing the connection between the liner and the storage tube.

[0031] In some embodiments, the proximal end of the connecting wire is inserted into the distal end of the guide tube; the sliding portion moves axially along the sheath tube, driving the guide tube to move axially relative to the sheath tube, the guide tube drives the connecting wire to move axially relative to the sheath tube, and the connecting wire drives the clamping assembly to move.

[0032] According to the clamping device in the above embodiment, the buckle part and the locking part are separately arranged relative to the circumference of the storage tube, and the locking part will not affect the buckling state of the buckle part when locking the clamping assembly, and the connection stability between the liner and the storage tube is maintained. In addition, the buckle part and the locking part are separately arranged relative to the circumference of the storage tube. When the buckle part is operated to disassemble the liner from the storage tube, the locking part will not affect the disassembly of the buckle part, ensuring that the disassembly process is smooth and lossless, reducing the risk of surgery. In addition, the buckle part and the locking part are separately arranged relative to the circumference of the storage tube, so that the buckle part and the locking part can be set with a larger axial length, so that the buckle part and the locking part have better elastic properties, respectively, which is conducive to the connection and connection release between the buckle part and the storage tube, and is also conducive to the locking and unlocking of the locking part, thereby improving the locking stability of the clamping assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0034] Figure 1 is an overall schematic diagram of a clamping device according to some embodiments of this specification;

[0035] Figure 2 is a cross-sectional view of a distal end of a clip device and a delivery device according to some embodiments of the present specification;

[0036] Figure 3 It is a schematic diagram of the cooperation between the storage tube and the liner according to some embodiments of this specification, wherein part of the structure of the storage tube is hidden and not shown;

[0037] Figure 4 is a schematic diagram of the structure of a storage tube according to some embodiments of the present specification, wherein part of the structure of the storage tube is hidden and not shown;

[0038] Figure 5 is a cross-sectional view of a partial structure of a clamping device according to some embodiments of the present specification;

[0039] Figure 6 is a cross-sectional view of a distal portion of a clip device and a delivery device according to some embodiments of the present specification;

[0040] Fig. 7A The structure of the distal end portion of the mandrel shown in some embodiments of this specification is schematically shown. Figure 1 ;

[0041] Figure 7B The structure of the distal end portion of the mandrel shown in some embodiments of this specification is schematically shown. Figure 2 ;

[0042] Figure 7C The structure of the distal end portion of the mandrel shown in some embodiments of this specification is schematically shown. Figure 3 ;

[0043] Figure 8 is a schematic diagram of a distal portion of a clip device and a delivery device according to some embodiments of the present specification;

[0044] Fig. 9A is a schematic diagram of the structure of the distal end portion of the mandrel and the second connection structure according to some embodiments of this specification Figure 1 ;

[0045] Fig. 9B is a schematic diagram of the structure of the distal end portion of the mandrel and the second connection structure according to some embodiments of this specification Figure 2 ;

[0046] Fig. 9C The structure diagram of the distal end portion of the mandrel and the second connecting structure after deformation according to some embodiments of the present specification is shown in FIG. Figure 3 .

[0047] Fig.10 is a cross-sectional view of the distal portion of the delivery device and the clamp device according to some embodiments of the present specification Figure 1 ;

[0048] Fig.11 is a cross-sectional view of the distal portion of the delivery device and the clamp device according to some embodiments of the present specification Figure 2 ;

[0049] Fig.12 is a cross-sectional view of the distal portion of the delivery device and the clamp device according to some embodiments of the present specification Figure 3 ;

[0050] Fig.13 is a cross-sectional view of the distal portion of the delivery device and the clamp device according to some embodiments of the present specification Figure 4 ;

[0051] Fig.14 is a cross-sectional view of the distal portion of the delivery device and the clamp device according to some embodiments of the present specification Figure 5 ;

[0052] Fig.15 is a cross-sectional view of the distal portion of the delivery device and the clamp device according to some embodiments of the present specification Figure 6 ;

[0053] Fig.16 is a cross-sectional view of a clamp device according to some embodiments of the present specification;

[0054] Fig.17 is a schematic diagram of the structure of the delivery device and the clamp device after connection and release according to some embodiments of this specification;

[0055] Fig.18 is a schematic diagram of the cooperation between the disassembly device and the clamp device according to some embodiments of this specification;

[0056] Fig.19 According to some embodiments of this specification, the schematic diagram of the liner and the storage tube before disassembly;

[0057] Fig. 20 It is a schematic diagram of the liner and the storage tube after being disassembled according to some embodiments of the present specification.

[0058] Fig.21 According to some embodiments of this specification, the clamping assembly is unlocked. Figure 1 ;

[0059] Fig. 22 This is a schematic diagram of unlocking the clamping assembly according to some embodiments of this specification. Figure 2 .

[0060] Wherein, the accompanying drawings are marked as follows:

[0061] 1 is a clamping device;

[0062] 10 is a clamp device; 20 is a conveying device;

[0063] 100 is a storage tube; 110 is a clamping portion; 111 is a hanging hole; 120 is a disassembly portion; 121 is a slot hole; 130 is a limiting structure; 140 is an inner tube; 150 is an outer tube; 160 is a blocking structure; 170 is a first connecting structure; 171 is a recess; 180 is a step;

[0064] 200 is the inner lining; 210 is the buckle part; 211 is the clamping arm; 212 is the protrusion; 220 is the locking part; 221 is the spring sheet; 230 is the base ring; 240 is the mounting plate;

[0065] 300 is a clamping assembly; 310 is a first clamping arm; 320 is a second clamping arm; 330 is a pin shaft; 340 is a locked portion;

[0066] 400 is a handle; 410 is a fixed part; 420 is a sliding part;

[0067] 500 is a conveying part; 510 is a sheath tube; 520 is a core shaft; 521 is a connecting piece; 5211 is a hook; 5212 is a support arm; 5213 is a bending part; 522 is a connecting tube; 523 is a connecting wire; 524 is a guide tube;

[0068] 600 is a disassembly device;

[0069] 700 is a blocking device; 710 is a limiting piece;

[0070] 800 is a second connection structure; 810 is a convex portion; 820 is a connection ring; 830 is a connection arm;

[0071] 900 is an end cover; 910 is a limiting convex. DETAILED DESCRIPTION

[0072] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0073] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0074] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0075] Figure 1 It is an overall schematic diagram of the clamping device 1 shown in some embodiments of the present specification.

[0076] The embodiments of this specification relate to a clamping instrument 1, which includes a clamp device 10 and a conveying device 20. The conveying device 20 can be used to convey the clamp device 10 to a position on a medical operation object where a medical operation needs to be performed, and the clamp device 10 can be used to perform a medical operation on the medical object. In some embodiments, the medical operations performed by the clamp device 10 may include surgical hemostasis, wound healing, tissue fixation, etc., and the clamp device 10 can achieve these medical operations by closing the clamp arms. In some embodiments, in order to maintain the medical operation performed by the clamp device 10, the clamp device 10 includes a locking state, and when the clamp device 10 is in the locked state, the clamp arms of the clamp device 10 can remain in a closed state. In some embodiments, the clamp device 10 is retained on the medical operation object (e.g., clamped on the tissue) by maintaining the locked state.

[0077] Figure 2 is a cross-sectional view of the distal end of the clip device 10 and the delivery device 20 according to some embodiments of the present specification. Figure 3 It is a schematic diagram of the cooperation between the storage tube 100 and the liner 200 according to some embodiments of the present specification, wherein part of the structure of the storage tube 100 is hidden and not shown.

[0078] like Figure 1 and Figure 2 As shown, the clamping device 1 may include a clamp device 10 and a delivery device 20 releasably connected to the clamp device 10. The "releasable connection" involved in the embodiments of this specification refers to a connection mode in which the connection relationship between two components (such as the clamp device 10 and the delivery device 20) can be detachably released.

[0079] In some embodiments, the clip device 10 may include a receiving tube 100, a liner 200, and a clamping assembly 300. The liner 200 is disposed in the receiving tube 100 and is configured to cooperate with the clamping assembly 300 to lock the clamping assembly 300. The proximal end of the clamping assembly 300 is at least partially received in the channel of the receiving tube 100, and the distal end of the clamping assembly 300 is used to perform a designated operation (e.g., hemostasis, ligation).

[0080] The "proximal end" and "distal end" involved in the embodiments of this specification may indicate orientation, which means that along the axial direction of the clamping device 1 (for example, the extension direction of the conveying device 20) or along the direction in which the clamping device 1 enters the human body, the orientation of the side close to the operator and away from the target object is the "proximal end", and the orientation of the side close to the target object and away from the operator is the "distal end". "Proximal end" and "distal end" should not be understood as indicating only the ends. The "axial" and "radial" involved in the embodiments of this specification may indicate orientation. The "axial" refers to the direction in which the conveying device 20 extends or the axial direction of the sheath 510. The "radial" direction is perpendicular to the "axial" direction, that is, the "radial" direction is perpendicular to the direction in which the conveying device 20 extends or the axial direction of the sheath 510. The "circumferential" involved in the embodiments of this specification refers to the "circumferential direction", that is, the direction around the axial direction of the cylinder.

[0081] In some embodiments, the delivery device 20 is configured to be able to deliver the clip device 10 to a target area for performing a specified operation. In some embodiments, the target area may be an area (e.g., a lesion) within a target object where a specified operation needs to be performed. In some embodiments, the specified operation may be a medical operation performed in a surgical operation, such as hemostasis, ligation, etc. In some embodiments, the target object may be an object undergoing a medical operation. In some embodiments, the target object may include a biological object or a non-biological object, wherein the biological object may include a person (e.g., a patient), an animal, or a plant, etc., and the non-biological object may include an experimental model (e.g., an organ model, etc.). In some embodiments, the delivery device 20 may also be used to operate the clip device 10 to perform a specified operation in the target area. In some embodiments, the delivery device 20 may include a handle 400 and a delivery portion 500. In some embodiments, the delivery portion 500 may be used to deliver the clip device 10 to a target area within a target object. In some embodiments, the delivery portion 500 of the delivery device 20 may include a sheath 510 and a mandrel 520. In some embodiments, the sheath 510 may be a tubular structure that provides an internal passage for other components (e.g., a mandrel 520). In some embodiments, the core shaft 520 can be a long shaft-like structure disposed in the internal channel of the sheath 510, for driving the clamp device 10 to move. In some embodiments, the delivery device 20 can be connected to the clamp device 10 through the sheath 510 and the core shaft 520. In some embodiments, the handle 400 can drive the clamp device 10 to perform designated operations. In some embodiments, the handle 400 of the delivery device 20 can include a fixed portion 410 and a sliding portion 420. Specifically, an operator (e.g., a doctor) can perform hemostasis, ligation, and other operations on the clamp device 10 through the sliding portion 420. For more information on the connection relationship between the delivery device 20 and the clamp device 10, please refer to the specification. Figure 6 and its related description.

[0082] like Figure 2 As shown, some embodiments of the present specification provide a clamping device 1, which includes a clamp device 10. The clamp device 10 includes a storage tube 100, a liner 200, and a clamping assembly 300. The storage tube 100 can be a hollow tube that accommodates the liner 200 and the clamping assembly 300. The liner 200 is arranged inside the storage tube 100, and the clamping assembly 300 is movably arranged in the hollow channel of the storage tube 100, and has different states at different positions of the storage tube 100, for example, the clamping assembly 300 has an open state when it extends from the distal end of the storage tube 100, has a closed state after the proximal end of the clamping assembly 300 is retracted into the storage tube 100, and has a locked state after the clamping assembly 300 moves to cooperate with the liner 200, etc.

[0083] like Figure 3 As shown, the liner 200 includes a buckle portion 210, which is used to detachably connect the liner 200 and the storage tube 100; in some embodiments, the buckle portion 210 of the liner 200 is buckled with the storage tube 100 to limit the movement of the liner 200 relative to the storage tube 100, for example, the liner 200 is limited to axial movement and / or circumferential rotation relative to the storage tube 100 to maintain the stability of the liner 200. After the buckle portion 210 of the liner 200 is released from the storage tube 100, the liner 200 can move relative to the storage tube 100, for example, the liner 200 can move relative to the storage tube 100 from the proximal end to the distal end. In some embodiments, the liner 200 and the storage tube 100 are disassembled in a manner including but not limited to pull-out disassembly, top-pressing disassembly, etc.

[0084] The liner 200 further includes a locking portion 220, which is used to lock the clamping assembly 300. In some embodiments, when the liner 200 is connected to the storage tube 100, the clamping assembly 300 is closed and moves from the distal end to the proximal end until it is matched with the locking portion 220, and then the clamping assembly 300 is locked. It should be noted that the locked state of the clamping assembly 300 involved in the embodiments of this specification refers to a state in which the clamping assembly 300 cannot move from the proximal end to the distal end.

[0085] See also Figure 3, the buckle part 210 and the locking part 220 are located at different circumferential positions relative to the storage tube 100. In some embodiments, the buckle part 210 and the locking part 220 are arranged at preset angle intervals relative to the circumferential position of the storage tube 100, wherein the preset angles include but are not limited to 30°, 45°, 60°, 90°, 120°, 145°, 180°, etc. The buckle part 210 and the locking part 220 are arranged separately relative to the circumference of the storage tube 100, and the locking part 220 does not affect the buckling state of the buckle part 210 when locking the clamping assembly 300, and maintains the connection stability between the liner 200 and the storage tube 100. In addition, the buckle part 210 and the locking part 220 are arranged separately relative to the circumference of the storage tube 100, and when the buckle part 210 is operated to disassemble the liner 200 from the storage tube 100, the locking part 220 does not affect the disassembly of the buckle part 210, ensuring that the disassembly process is smooth and lossless, reducing the risk of surgery. In addition, by separately arranging the snap portion 210 and the locking portion 220 relative to the circumference of the storage tube 100, the snap portion 210 and the locking portion 220 can be set to a larger axial length, so that the snap portion 210 and the locking portion 220 respectively have better elastic properties, which is beneficial to the connection and release of the snap portion 210 and the storage tube 100, and also beneficial to the locking and unlocking of the locking portion 220, thereby improving the locking stability of the clamping assembly 300.

[0086] like Figure 2 As shown, in some embodiments, the clamping assembly 300 includes a first clamp arm 310, a second clamp arm 320 and a pin 330, and the proximal end of the first clamp arm 310 and the proximal end of the second clamp arm 320 are connected by the pin 330. In some embodiments, the proximal end of the first clamp arm 310 is provided with a first pin hole, the proximal end of the second clamp arm 320 is provided with a second pin hole, and the pin 330 passes through the first pin hole and the second pin hole to connect the first clamp arm 310 and the second clamp arm 320.

[0087] In some embodiments, the clamping assembly 300 includes a locked portion 340, which is used to cooperate with the locking portion 220, so as to limit the movement of the clamping assembly 300 from the proximal end to the distal end. In some embodiments, the radial end of the pin 330 constitutes the locked portion 340, and the pin 330 is configured to cooperate with the locking portion 220 when passing over the locking portion 220 from the distal end to the proximal end. The pin 330 has both the function of connecting the first clamp arm 310 and the second clamp arm 320 and the function of locking the clamping assembly 300, so that the structure is more simplified. In some embodiments, a protrusion is provided at the proximal end of the clamping assembly 300, for example, a protrusion is provided at the proximal end of the first clamp arm 310 and the protrusion is respectively provided at the proximal end of the second clamp arm 320, and the protrusion constitutes the locked portion 340, and when the protrusion passes over the locking portion 220 from the distal end to the proximal end, it cooperates with the locking portion 220.

[0088] In some embodiments, the liner 200 is connected to the storage tube 100, and when the locking portion 220 cooperates with the locked portion 340, the clip device 10 is locked. After the liner 200 is connected to the storage tube 100, the liner 200 is fixed relative to the storage tube 100. When the locking portion 220 cooperates with the locked portion 340, the clamping assembly 300 cannot move from the proximal end to the distal end relative to the storage tube 100, and the clip device 10 is locked. In some embodiments, the connection between the liner 200 and the storage tube 100 is released, and the clip device 10 is unlocked. After the connection between the liner 200 and the storage tube 100 is released, the liner 200 can move axially relative to the storage tube 100 (for example, from the proximal end to the distal end), then the liner 200 can move from the proximal end to the distal end relative to the storage tube 100, and accordingly, the clamping assembly 300 can move from the proximal end to the distal end relative to the storage tube 100, and the clip device 10 is unlocked.

[0089] like Figure 3 As shown, the locking portion 220 includes at least one spring sheet 221, the distal end of the spring sheet 221 is connected to the liner 200, and the proximal end of the spring sheet 221 extends into the interior of the liner 200. The spring sheet 221 has elastic deformation capability. When the clamping assembly 300 moves from the distal end to the proximal end, when the locked portion 340 on the clamping assembly 300 passes the spring sheet 221, the locked portion 340 presses the proximal end of the spring sheet 221 radially outward, and the spring sheet 221 undergoes elastic deformation to avoid the locked portion 340. After the locked portion 340 passes over the proximal end of the spring sheet 221, the spring sheet 221 returns to its original shape, and the proximal end of the spring sheet 221 extends into the interior of the liner 200 again, and forms a stop with the locked portion 340, restricting the locked portion 340 from moving from the proximal end to the distal end, thereby restricting the clamping assembly 300 from moving from the proximal end to the distal end, and the clamping assembly 300 is locked in the storage tube 100.

[0090] In some embodiments, the locking portion 220 includes two spring pieces 221, which are arranged at an interval of 180° or substantially 180° relative to the circumference of the liner 200. Substantially 180° may mean that the interval angle of the two spring pieces 221 is between 170° and 190°, such as 175°.

[0091] In some embodiments, the liner 200 includes a base ring 230 and at least one mounting plate 240, wherein the mounting plate 240 is configured as an arc-shaped plate extending axially from the base ring 230, and the mounting plate 240 is disposed at the distal end of the base ring 230. The locking portion 220 is disposed on the mounting plate 240, for example, the locking portion 220 is cut from a wall of the mounting plate 240, or the locking portion 220 is fixed to the mounting plate 240 by welding or the like.

[0092] Figure 4 It is a schematic diagram of the structure of the storage tube 100 shown in some embodiments of the present specification, wherein part of the structure of the storage tube 100 is hidden and not shown.

[0093] like Figure 3 and Figure 4 As shown, in some embodiments, the storage tube 100 includes a snap-fit ​​portion 110, and the snap-fit ​​portion 210 of the liner 200 cooperates with the snap-fit ​​portion 110, and the liner 200 is connected to the storage tube 100. In some embodiments, the snap-fit ​​portion 110 includes but is not limited to a groove, a through hole, a protrusion, etc.; the snap-fit ​​portion 210 includes but is not limited to a protrusion, a hook, a groove, etc. In some embodiments, after the snap-fit ​​portion 110 and / or the snap-fit ​​portion 210 are deformed, broken, or displaced by force, the matching relationship between the snap-fit ​​portion 110 and the snap-fit ​​portion 210 is released.

[0094] In some embodiments, the engaging portion 110 includes at least one hanging hole 111 formed on the side wall of the storage tube 100, and the buckle portion 210 includes at least one clamping arm 211 and at least one protrusion 212. The proximal end of the clamping arm 211 is a fixed end, and the distal end of the clamping arm 211 is a free end. The protrusion 212 is arranged at the distal end of the clamping arm 211, and at least one protrusion 212 is detachably matched with at least one hanging hole 111. The clamping arm 211 is elastic and can deflect around the fixed end when subjected to external force. The protrusion 212 is matched with the hanging hole 111, and the hanging hole 111 limits the axial displacement of the protrusion 212, thereby limiting the axial movement of the liner 200 relative to the storage tube 100. The protrusion 212 is released from the hanging hole 111, and the liner 200 can move axially relative to the storage tube 100. In some embodiments, the fixed end of the clamp arm 211 refers to an end that has no relative displacement with the liner 200, for example, the fixed end of the clamp arm 211 is connected to the base ring 230 of the liner 200. The free end of the clamp arm 211 refers to an end of the clamp arm 211 that can generate relative displacement with the liner 200 after deformation. In some embodiments, the clamp arm 211 is disposed at the distal end of the base ring 230 of the liner 200 and is extended along the axial direction of the liner 200.

[0095] In some embodiments, the buckle portion 210 includes two clamping arms 211 and two protrusions 212, and the two protrusions 212 are respectively arranged at the free ends of the two clamping arms 211. The two clamping arms 211 are respectively arranged at 180° or substantially 180° intervals relative to the circumference of the liner 200. Wherein, substantially 180° may refer to that the interval angle range of the two clamping arms 211 is between 170° and 190°, such as 175°. In some embodiments, the two clamping arms 211 and the two elastic sheets 221 of the liner 200 are staggered in the circumferential direction of the base ring 230, for example, along the circumferential direction of the base ring 230, the first elastic sheet 221, the first clamping arm 211, the second elastic sheet 221, and the second clamping arm 211 are arranged in sequence at intervals of 90° or substantially 90°. Wherein, substantially 90° may refer to that the interval angle range of the two clamping arms 211 is between 85° and 95°, such as 88°.

[0096] In some embodiments, the storage tube 100 includes a disassembly portion 120, which includes at least one slot 121 formed on the side wall of the storage tube 100, and the buckle portion 210 is at least partially disposed on the inner side of the slot 121, that is, the partial structure of the buckle portion 210 corresponding to the position of the slot 121 can be exposed from the slot 121.

[0097] In some embodiments, the clamping device 1 further includes a disassembly device 600, which is configured to pass through the slot 121 to press the buckle portion 210 inward, and release the buckle portion 210 from the engaging portion 110, and release the connection between the liner 200 and the storage tube 100. For example, the slot 121 is located at a corresponding position between the free end and the fixed end of the clamp arm 211, so that the slot 121 at least partially exposes the clamp arm 211, and the disassembly device 600 can pass through the slot 121 to perform a disassembly operation on the clamp arm 211, so that the protrusion 212 and the hanging hole 111 are released, and the liner 200 is released from the storage tube 100. For more information about the operation process of the disassembly device 600, please refer to this specification. Figures 18 to 22 and its related description.

[0098] In some embodiments, the opening area of ​​the disassembly portion 120 is larger than the opening area of ​​the engaging portion 110, so that the disassembly device 600 has more space to operate the buckle portion 210, reducing the difficulty of disassembly. The disassembly portion 120 and the engaging portion 110 are arranged separately to prevent the disassembly portion 120 from affecting the stability of the engagement portion 110 and the buckle portion 210. In addition, the buckle portion 210 includes a long strip-shaped clamping arm 211, and the opening of the disassembly portion 120 can be arranged at any position corresponding to the clamping arm 211, and has a larger opening area. The disassembly device 600 can disassemble the buckle portion 210 at any position of the clamping arm 211, has a larger operating space, and is easier to operate.

[0099] In some embodiments, the disassembly device 600 can apply a disassembly force to the clip device 10, and the disassembly device 600 includes but is not limited to a biopsy forceps, or a snare, or an energy device, or a special disassembly device, etc. The disassembly device 600 can approach the clip device 10 through the endoscopic forceps channel to apply a disassembly force to the buckle portion 210. In some embodiments, the disassembly device 600 acts on the buckle portion 210 through the disassembly portion 120, and the opening area of ​​the disassembly portion 120 is relatively large, which is more suitable for the disassembly device 600 (especially the snare) to take the buckle portion 210 and apply a disassembly force radially inward. Therefore, the above structure can reduce the difficulty of disassembly and improve the success rate of disassembly.

[0100] like Figure 3 and Figure 4As shown, in some embodiments, the proximal end of the storage tube 100 includes a limiting structure 130, and the limiting structure 130 is configured to prevent the liner 200 from escaping from the storage tube 100. In some embodiments, when the clamping assembly 300 moves from the distal end to the proximal end, the relative movement between the clamping assembly 300 and the liner 200 will apply a friction force from the distal end to the proximal end to the liner 200, so that the liner 200 has a tendency to move from the distal end to the proximal end. In order to prevent the liner from escaping from the storage tube 100, the limiting structure 130 is provided at the proximal end of the storage tube 100 to keep the liner 200 in the storage tube.

[0101] In some embodiments, the storage tube 100 includes an inner tube 140 and an outer tube 150, at least a portion of the distal end of the inner tube 140 is fixed to the inner side of the proximal end of the outer tube 150, the distal end of the inner tube 140 forms a limiting structure 130, the outer diameter of the liner 200 is larger than the inner diameter of the inner tube 140, then the end surface of the inner tube 140 can cooperate with the proximal end of the liner 200, and limit the movement of the liner 200 from the distal end to the proximal end, thereby preventing the liner 200 from escaping from the proximal end of the storage tube 100, and ensuring the connection stability between the liner 200 and the storage tube 100 during the movement of the clamping assembly 300. In some embodiments, a portion of the inner tube 140 is fixed to the inner side of the proximal end of the outer tube 150, and another portion of the inner tube 140 extends out of the proximal end of the outer tube 150. In some embodiments, the inner tube 140 is entirely fixed to the inner side of the proximal end of the outer tube 150. In some embodiments, the limiting structure 130 also includes but is not limited to structures such as a protrusion and a baffle disposed at the distal end of the inner tube 140 .

[0102] Figure 5 It is a cross-sectional view of a partial structure of a clamping device 1 shown in some embodiments of this specification.

[0103] like Figure 2 and Figure 5 As shown, in some embodiments, the clamping device 1 further includes a conveying device 20, the conveying device 20 includes a conveying portion 500, the conveying portion 500 includes a sheath 510 and a core shaft 520 that moves in the channel of the sheath 510, the core shaft 520 is releasably connected to the clamping assembly 300, and the core shaft 520 moves from the distal end to the proximal end to drive the clamping assembly 300 to move from the distal end to the proximal end relative to the receiving tube 100. In some embodiments, the core shaft 520 moves from the distal end to the proximal end, and after the clamping assembly 300 closes and clamps the tissue outside the receiving tube 100, it retracts the receiving tube 100 toward the proximal end, and continues to move until the locking portion 220 cooperates with the locked portion 340, and the clamping assembly 300 is locked.

[0104] In some embodiments, the delivery device 20 further includes a handle 400, the handle 400 includes a fixed portion 410 and a sliding portion 420, the sliding portion 420 is movable relative to the fixed portion 410, and the fixed portion 410 is disposed at the proximal end of the sheath 510. The proximal end of the mandrel 520 is connected to the sliding portion 420, the sliding portion 420 slides relative to the fixed portion 410, and the mandrel 520 moves relative to the sheath 510, thereby driving the clamping assembly 300 to move.

[0105] Figure 6 is a cross-sectional view of a distal portion of a clip device 10 and a delivery device 20 according to some embodiments of the present specification.

[0106] like Figure 6 As shown, in some embodiments, the mandrel 520 includes a connecting piece 521, a connecting tube 522 and a connecting wire 523, the distal end of the connecting wire 523 is fixed to the proximal end of the connecting tube 522, the proximal end of the connecting piece 521 is inserted into the distal end of the connecting tube 522, and the distal end of the connecting piece 521 is releasably connected to the pin 330. In some embodiments, the distal end of the connecting wire 523 is inserted into the proximal end of the connecting tube 522, and the two are fixed by bonding, welding, interference fit, etc. In some embodiments, the proximal end of the connecting piece 521 is inserted into the distal end of the connecting tube 522, and the two are fixed by bonding, welding, interference fit, etc. In some embodiments, the distal end of the connecting wire 523 abuts against the proximal end of the connecting piece 521 to enhance the connection stability with the connecting tube 522. In some embodiments, when the force on the distal end of the connecting piece 521 reaches a certain threshold, the connection with the pin 330 is released by breaking, deforming or displacing.

[0107] like Figure 5 and Figure 6 As shown, in some embodiments, the sliding portion 420 is connected to the connecting wire 523, and the movement of the sliding portion 420 drives the connecting wire 523 to move axially along the sheath tube 510. In some embodiments, the connecting wire 523 has a certain rigidity, and can transmit the axial force or torque of the sliding portion 420 to the connecting tube 522, and the connecting tube 522 further transmits the axial force or torque to the connecting piece 521, and the connecting piece 521 transmits the axial force or torque to the clamping assembly 300, so that the clamping assembly 300 performs operations such as opening, closing, locking, and rotating.

[0108] In some embodiments, the mandrel 520 further includes a guide tube 524, the proximal end of which is L-shaped, the proximal end of which is fixedly connected to the sliding portion 420, and the proximal end of the connecting wire 523 is plugged into the distal end of the guide tube 524; the sliding portion 420 moves axially along the sheath tube 510, causing the guide tube 524 to move axially relative to the sheath tube 510, the guide tube 524 causes the connecting wire 523 to move axially relative to the sheath tube 510, and the connecting wire 523 drives the clamping assembly 300 to move. In some embodiments, the proximal end of the guide tube 524 cooperates with the sliding portion 420 through an L-shaped structure, limiting the axial displacement of the guide tube 524 and the sliding portion 420, and maintaining the synchronous movement of the guide tube 524 and the sliding portion 420. The distal end of the guide tube 524 extends to the vicinity of the distal end of the handle 400, thereby improving the connection stability of the connecting wire 523 in the handle 400.

[0109] Fig. 7A is a schematic diagram of the structure of the distal end portion of the mandrel 520 shown in some embodiments of this specification Figure 1 ; Figure 7B is a schematic diagram of the structure of the distal end portion of the mandrel 520 shown in some embodiments of this specification Figure 2 ; Figure 7C is a schematic diagram of the structure of the distal end portion of the mandrel 520 shown in some embodiments of this specification Figure 3 .

[0110] like Figures 6 to 7C As shown, in some embodiments, a hook 5211 is formed at the distal end of the connecting piece 521, and the hook 5211 cooperates with the pin 330. The hook 5211 is configured to be released from the pin 330 after being deformed or broken by force. In some embodiments, the hook 5211 cooperates with the circumferential side of the pin 330. In some embodiments, a connecting hole (not shown in the figure) is formed on the pin 330, and the hook 5211 cooperates with the connecting hole on the pin 330. In some embodiments, the sliding portion 420 drives the connecting wire 523 to move from the distal end to the proximal end, and the connecting wire 523 drives the connecting piece 521 to move from the distal end to the proximal end. When the tension between the hook 5211 and the pin 330 reaches a certain threshold, the hook 5211 is deformed or broken (such as Figure 7C As shown), the pin 330 is released.

[0111] In some embodiments, the connecting piece 521 includes two arms 5212, and a hook 5211 is provided at the distal end of each arm 5212, so as to cooperate with the radial ends of the pin 330, so that the force on the pin 330 is more uniform. In some embodiments, the hooks 5211 on the two arms 5212 are oriented in opposite directions, that is, the opening of one hook 5211 is opposite to the opening of the other hook 5211, so as to enhance the stability of the connection between the hook 5211 and the pin 330.

[0112] Figure 8 Schematic diagram of the distal end portion of the clip device 10 and the delivery device 20 according to some embodiments of the present specification.

[0113] Combination Figure 4 and Figure 8 As shown, in some embodiments, the proximal end of the storage tube 100 includes a blocking structure 160, and the blocking structure 160 is configured to limit the movement of the clamping assembly 300 from the distal end to the proximal end within a certain distance after the pin 330 passes over the locking portion 220. In some embodiments, after the pin 330 passes over the locking portion 220, the locking portion 220 can lock the locked portions 340 at both ends of the pin 330, limiting the movement of the clamping device from the proximal end to the distal end. The clamping device continues to move from the distal end to the proximal end for a certain distance before cooperating with the blocking structure 160, and the blocking structure 160 can limit the movement of the clamping assembly 300 from the distal end to the proximal end, thereby avoiding the locking failure caused by the narrow distance between the locking portion 220 and the blocking structure 160. In addition, the pin shaft 330 of the clamping assembly 300 moves within a certain distance between the locking portion 220 and the blocking structure 160. The operator can operate the sliding portion 420 to make the clamping assembly 300 cooperate with the blocking structure 160. The clamping assembly 300 remains stationary, and the connecting piece 521 continues to be stressed and the pin shaft 330 is released.

[0114] In some embodiments, the pin 330 continues to move over the locking portion 220 until it abuts against the blocking structure 160, and the blocking structure 160 restricts the clamping assembly 300 from moving from the distal end to the proximal end. In some embodiments, the blocking structure 160 includes but is not limited to a protrusion, a blocking sheet, etc. In some embodiments, the blocking structure 160 is arranged corresponding to the locking portion 220 of the pin 330 and abuts against the proximal end of the locking portion 220.

[0115] In some embodiments, the clamp device 10 further includes a blocking device 700, which is arranged crosswise with the pin 330 in the radial direction. After the pin 330 passes over the locking portion 220, it continues to move until the blocking device 700 abuts against the blocking structure 160, and the blocking structure 160 limits the movement of the clamping assembly 300 from the distal end to the proximal end. In some embodiments, the blocking device 700 includes but is not limited to structures such as a limit rod and a limit plate. In some embodiments, the blocking device 700 includes a limit plate 710, on which a mounting hole is formed. The limit plate 710 is arranged between the first clamp arm 310 and the second clamp arm 320, and is aligned with the first pin hole and the second pin hole. The pin 330 is passed through the first pin hole, the mounting hole, and the second pin hole, so that the first clamp arm 310, the second clamp arm 320 and the limit plate 710 are connected.

[0116] In some embodiments, after the blocking structure 160 restricts the clamping assembly 300 from moving from the distal end to the proximal end, the distal end of the connecting piece 521 is deformed or broken by force, and the connection with the pin 330 is released. In some embodiments, after the blocking structure 160 restricts the clamping assembly 300 from moving from the distal end to the proximal end, the mandrel 520 continues to move from the distal end to the proximal end, and the tension between the connecting piece 521 of the mandrel 520 and the pin 330 gradually increases. When the tension reaches a certain threshold, the hook 5211 at the distal end of the connecting piece 521 is deformed or broken, so that the connection between the mandrel 520 and the clamping assembly 300 is released.

[0117] In some embodiments, other parts of the clamping assembly 300 (such as the proximal ends or proximal protrusions of the first clamping arm 310 and the second clamping arm 320 ) may also cooperate with the blocking structure 160 to limit the movement of the clamping assembly 300 from the distal end to the proximal end.

[0118] In some embodiments, the storage tube 100 includes an inner tube 140 and an outer tube 150, at least a portion of the distal end of the inner tube 140 is fixed to the inner side of the proximal end of the outer tube 150, and the blocking structure 160 is provided on the inner tube 140 and protrudes radially inward relative to the inner wall of the inner tube 140. In some embodiments, the blocking structure 160 includes but is not limited to a protrusion, a blocking sheet, etc. on the inner wall of the inner tube 140.

[0119] Fig. 9A is a schematic diagram of the structure of the distal end portion of the mandrel 520 and the second connection structure 800 according to some embodiments of this specification. Figure 1 ; Fig. 9B is a schematic diagram of the structure of the distal end portion of the mandrel 520 and the second connection structure 800 according to some embodiments of this specification. Figure 2 ; Fig. 9C is a schematic diagram of the structure of the distal end portion of the mandrel 520 and the second connecting structure 800 after deformation according to some embodiments of this specification Figure 3 .

[0120] Combination Figure 6 , 9A to 9CIn some embodiments, the storage tube 100 includes a first connection structure 170, and the delivery device 20 also includes a second connection structure 800. The first connection structure 170 cooperates with the second connection structure 800, and the delivery device 20 is connected to the clamp device 10. The first connection structure 170 is separated from the second connection structure 800, and the connection between the delivery device 20 and the clamp device 10 is released. In some embodiments, the delivery device 20 is connected to the clamp device 10, and the mandrel 520 of the delivery device 20 controls the clamp assembly 300 of the clamp device 10 to clamp the tissue and then close, and continue to move proximally to lock. After the clamp assembly 300 is locked, the mandrel 520 continues to move proximally, and the connection between the mandrel 520 and the clamp assembly 300 is released. Then, the mandrel 520 continues to move proximally, the first connection structure 170 is separated from the second connection structure 800, and the clamp device 10 is released from the distal end of the delivery device 20, and the clamp device 10 remains on the tissue to clamp the tissue to achieve the purpose of ligation and hemostasis.

[0121] In some embodiments, the second connection structure 800 is disposed at the distal end of the mandrel 520. After the mandrel 520 is disconnected from the clamping assembly 300, the mandrel 520 continues to move to drive the second connection structure 800 to move, so that the second connection structure 800 is deformed or broken by force and separated from the first connection structure 170, and the connection between the second connection structure 800 and the first connection structure 170 is released. The distal end of the mandrel 520 refers to at least a portion of the section located at the distal end of the mandrel 520, and does not only refer to the end of the mandrel 520. In some embodiments, the first connection structure 170 and / or the second connection structure 800 include but are not limited to protrusions, grooves, through holes, etc. at the distal end of the mandrel 520. In some embodiments, the second connection structure 800 is a structural member independent of the mandrel 520, and is slidably matched with the distal end of the mandrel 520 to prevent the second connection structure 800 from affecting the movement of the mandrel 520.

[0122] like Figure 4 , 9A to 9CAs shown, in some embodiments, the first connection structure 170 includes a recess 171 disposed at the proximal end of the receiving tube 100, and the second connection structure 800 includes a convex portion 810, and the convex portion 810 is matched with the recess 171. The first connection structure 170 and the second connection structure 800 are connected, and the convex portion 810 is deformed or broken by force and falls out of the recess 171, and the first connection structure 170 and the second connection structure 800 are separated. In some embodiments, the recess 171 includes but is not limited to a groove, a through hole, etc. In some embodiments, the convex portion 810 includes but is not limited to a hook, a protrusion, etc. In some embodiments, when the convex portion 810 is matched with the recess 171, the sheath tube 510 of the conveying device 20 forms an axial limit with the receiving tube 100, and the conveying device 20 is connected to the clamp device 10. After the core shaft 520 is disconnected from the clamping assembly 300, the continued movement can drive the second connection structure 800 to move, so that the protrusion 810 is forced to escape from the recess 171, and the connection between the sheath tube 510 of the delivery device 20 and the receiving tube 100 is disconnected, and the delivery device 20 and the clamp device 10 are released. At this time, the clamp device 10 is left on the tissue to continue hemostasis, ligation, etc., and the delivery device 20 is withdrawn from the organism.

[0123] In some embodiments, the second connection structure 800 includes a connection ring 820 and at least one connection arm 830, the connection ring 820 is connected to the core shaft 520, the proximal end of the connection arm 830 is fixed to the connection ring 820, and the convex portion 810 is arranged at the distal end of the connection arm 830. In some embodiments, the connection arm 830 extends outwardly from the proximal end to the distal end, that is, the distal end of the connection arm 830 is farther away from the central axis of the sheath tube 510 than the proximal end, so as to avoid the core shaft 520, so that the connection arm 830 and the core shaft 520 do not affect each other. In some embodiments, the distal end of the connection arm 830 is bent outward to form the convex portion 810, the proximal end opening of the storage tube 100 constitutes the concave portion 171, and the convex portion 810 is inserted into the concave portion 171 from the inner side of the storage tube 100 to form a fit. In some embodiments, the distal end of the connecting arm 830 is bent inward to form a convex portion 810, and the proximal opening of the storage tube 100 forms a concave portion 171, and the convex portion 810 is inserted into the concave portion 171 from the inner side of the storage tube 100 to form a fit.

[0124] In some embodiments, the connecting ring 820 is sleeved on the outside of the connecting tube 522, the proximal end of the connecting piece 521 includes a bent portion 5213, and the inner diameter of the distal end of the connecting ring 820 is smaller than the radial dimension of the bent portion 5213. In some embodiments, after the core shaft 520 is disconnected from the clamping assembly 300, it continues to move toward the proximal end, the bent portion 5213 of the connecting piece 521 abuts against the connecting ring 820 after passing through the connecting arm 830, and drives the connecting ring 820 to move toward the proximal end, the convex portion 810 of the connecting arm 830 on the connecting ring 820 is deformed or broken by force, the first connecting structure 170 and the second connecting structure 800 are released from the mating, and the conveying device 20 and the clamp device 10 are released.

[0125] In some embodiments, the bent portion 5213 of the connecting piece 521 abuts against the middle or proximal end of the connecting arm 830, so that the core shaft 520 applies a proximal force to the second connecting structure 800, causing the protrusion 810 of the connecting arm 830 to deform or break due to the force, and the first connecting structure 170 and the second connecting structure 800 are released from the matching, and the conveying device 20 and the clamp device 10 are released.

[0126] like Figure 6 As shown, in some embodiments, the delivery device 20 includes an end cap 900, the proximal end of the end cap 900 is connected to the distal end of the sheath tube 510, the outer side wall of the proximal end of the storage tube 100 is formed with a step 180 that is recessed radially inward, the first connection structure 170 is provided at the proximal end of the step 180, the distal end of the end cap 900 abuts against the turning point of the step 180, and the first connection structure 170 is located inside the end cap 900. In some embodiments, the end cap 900 is a hollow cylindrical structure, and the mandrel 520 passes through the end cap 900 and is connected to the clamping device. In some embodiments, the proximal end of the end cap 900 is connected and fixed to the distal end of the sheath tube 510, and the connection method between the two includes but is not limited to threaded fit, snap fit, bonding, welding, etc. The distal end of the end cap 900 abuts against the turning point of the step 180, and the step 180 can limit the movement of the end cap 900 from the proximal end to the distal end. By setting the step 180 to cooperate with the end cap 900, the radial size of the end cap 900 can be reduced.

[0127] like Figure 4 and Figure 6 As shown, in some embodiments, the storage tube 100 includes an inner tube 140 and an outer tube 150, the inner tube 140 is fixed to the inner side of the proximal end of the outer tube 150, the inner tube 140 at least partially extends out of the proximal end of the outer tube 150, the first connection structure 170 is provided at the portion of the inner tube 140 extending out of the outer tube 150, and the end cap 900 abuts against the proximal end of the outer tube 150. In some embodiments, the outer surfaces of the inner tube 140 and the outer tube 150 form a step 180, so there is no need to process the step 180 separately, simplifying the processing.

[0128] In some embodiments, the distal end of the end cap 900 is provided with a limiting protrusion 910 protruding radially inward, and the limiting protrusion 910 is provided between the step 180 and the first connecting structure 170. In some embodiments, the protrusion 810 of the second connecting structure 800 protrudes from the step 180 from the inside of the first connecting structure 170, and limits the movement of the end cap 900 from the distal end to the proximal end, and the step 180 limits the movement of the end cap 900 from the proximal end to the distal end, and the end cap 900 is connected to the receiving tube 100. When the mandrel 520 drives the second connecting structure 800 to disengage from the first connecting structure 170, the receiving tube 100 is disengaged from the distal end of the end cap 900, and the delivery device 20 and the clamp device 10 are released.

[0129] In combination with the structure of the clamping device 1 in the above embodiment, Figures 10 to 22 An exemplary movement sequence of the gripping instrument 1 is explained in more detail.

[0130] Fig.10 is a cross-sectional view of the distal end portion of the delivery device 20 and the clip device 10 according to some embodiments of the present specification Figure 1 .

[0131] like Fig.10 As shown, in some embodiments, the clamp device 10 is in an open state. The mandrel 520 of the delivery device 20 is releasably connected to the clamp assembly 300 of the clamp device 10, and the end cap 900 of the sheath tube 510 is releasably connected to the receiving tube 100. The mandrel 520 of the delivery device 20 moves from the proximal end to the distal end, pushing the clamp assembly 300 out of the receiving tube 100, and the first clamp arm 310 and the second clamp arm 320 of the clamp assembly 300 open to form a clamping space, ready to clamp tissue.

[0132] Fig.11 is a cross-sectional view of the distal end portion of the delivery device 20 and the clip device 10 according to some embodiments of the present specification Figure 2 .

[0133] like Fig.11 As shown, in some embodiments, the clamp device 10 is in a closed state. The mandrel 520 moves from the distal end to the proximal end, driving the proximal ends of the first clamp arm 310 and the second clamp arm 320 of the clamp assembly 300 to retract the receiving tube 100, and close under the action of the receiving tube 100. In some embodiments, the first clamp arm 310 and the second clamp arm 320 are elastic, and when the proximal ends of the first clamp arm 310 and the second clamp arm 320 are retracted to the receiving tube 100, the distal end of the receiving tube 100 generates a squeezing force on the first clamp arm 310 and the second clamp arm 320, so that the first clamp arm 310 and the second clamp arm 320 are elastically deformed and closed.

[0134] Fig.12 is a cross-sectional view of the distal end portion of the delivery device 20 and the clip device 10 according to some embodiments of the present specification Figure 3 .

[0135] like Fig.12 As shown, in some embodiments, the clip device 10 is in a locked state. The core shaft 520 moves from the distal end to the proximal end, driving the locked portion 340 of the clamping assembly 300 to pass over the locking portion 220 of the receiving tube 100. The locking portion 220 forms a limit on the locked portion 340, restricting the locked portion 340 from moving from the proximal end to the distal end, thereby restricting the clamping assembly 300 from moving from the proximal end to the distal end.

[0136] Fig.13 is a cross-sectional view of the distal end portion of the delivery device 20 and the clip device 10 according to some embodiments of the present specification Figure 4 .

[0137] like Fig.13 As shown, in some embodiments, the clip device 10 is in a locked state. After the locked portion 340 of the clamping assembly 300 passes over the locking portion 220, the core shaft 520 continues to move from the distal end to the proximal end, driving the blocking device 700 of the clamping assembly 300 to cooperate with the blocking structure 160 of the receiving tube 100. The blocking structure 160 restricts the blocking device 700 from moving from the distal end to the proximal end, thereby restricting the clamping assembly 300 from moving from the distal end to the proximal end.

[0138] Fig.14 is a cross-sectional view of the distal end portion of the delivery device 20 and the clip device 10 according to some embodiments of the present specification Figure 5 .

[0139] like Fig.14 As shown, in some embodiments, the connection between the clamping assembly 300 and the mandrel 520 is released. After the blocking device 700 of the clamping assembly 300 cooperates with the blocking structure 160 of the receiving tube 100, the mandrel 520 continues to move from the distal end to the proximal end, at which time the clamping assembly 300 remains at the current position, and the connecting piece 521 at the distal end of the mandrel 520 is deformed, broken or displaced due to the force, so that the connection between the mandrel 520 and the clamping assembly 300 is released.

[0140] Fig.15 is a cross-sectional view of the distal end portion of the delivery device 20 and the clip device 10 according to some embodiments of the present specification Figure 6 . Fig.16 is a cross-sectional view of a clip device 10 according to some embodiments of the present specification. Fig.17 It is a schematic diagram of the structure of the delivery device 20 and the clamp device 10 after being connected and released according to some embodiments of the present specification.

[0141] like Fig.15 As shown, in some embodiments, after the connection between the core shaft 520 and the clamping assembly 300 is released, the core shaft 520 continues to move from the distal end to the proximal end, and the bent portion 5213 of the connecting piece 521 of the core shaft 520 abuts against the second connecting structure 800, for example, abuts against the connecting ring 820 or the connecting arm 830 of the second connecting structure 800, and a force toward the proximal end is applied to the second connecting structure 800, and the protrusion 810 of the connecting arm 830 of the second connecting structure 800 is deformed, broken or displaced by the force and is released from the first connecting structure 170, thereby releasing the end cover 900 from the storage tube 100.

[0142] like Fig.16 and Fig.17As shown, in some embodiments, after the end cap 900 is released from the receiving tube 100, the connection between the delivery device 20 and the clamp device 10 is released, and the clamp device 10 remains in a locked state to clamp the tissue to achieve the purpose of hemostasis and ligation.

[0143] Fig.18 It is a schematic diagram of the cooperation between the disassembly device 600 and the clamp device 10 according to some embodiments of this specification. Fig.19 Schematic diagram of the liner 200 and the storage tube 100 before disassembly according to some embodiments of the present specification. Fig. 20 It is a schematic diagram of the liner 200 and the storage tube 100 after being disassembled according to some embodiments of the present specification.

[0144] like Figures 18 to 20 As shown, in some embodiments, the clamping assembly 300 is in a locked state, and the buckle portion 210 of the liner 200 cooperates with the engaging portion 110 of the receiving tube 100. The disassembly device 600 (e.g., a snare) takes the disassembly portion 120 (e.g., the slot 121) of the receiving tube 100, applies a disassembly force radially inward, and the buckle portion 210 deforms radially inward, so that the buckle portion 210 is disengaged from the engaging portion 110, and the matching relationship between the liner 200 and the receiving tube 100 is released, thereby changing the clamping assembly 300 from the locked state to the unlocked state.

[0145] Fig.21 According to some embodiments of this specification, the clamping assembly 300 is unlocked. Figure 1 . Fig. 22 is a schematic diagram of unlocking the clamping assembly 300 according to some embodiments of this specification. Figure 2 .

[0146] like Fig.21 and Fig. 22 As shown, in some embodiments, after the matching relationship between the liner 200 and the storage tube 100 is released, the first clamp arm 310 and the second clamp arm 320, due to their own elastic action, move the liner 200 distally relative to the storage tube 100, and the distal ends of the first clamp arm 310 and the second clamp arm 320 extend out of the storage tube 100 and reopen, so that the clamp device 10 placed at the lesion is separated from the tissue.

[0147] The beneficial effects that may be brought about by the embodiments of the present application include but are not limited to:

[0148] (1) The buckle part and the locking part are separately arranged relative to the circumference of the storage tube. When the locking part locks the clamping assembly, it will not affect the buckling state of the buckle part, thus maintaining the connection stability between the liner and the storage tube. In addition, the buckle part and the locking part are separately arranged relative to the circumference of the storage tube. When the buckle part is operated to disassemble the liner from the storage tube, the locking part will not affect the disassembly of the buckle part, thus ensuring a smooth and lossless disassembly process and reducing surgical risks;

[0149] (2) The opening area of ​​the disassembly portion is larger than the opening area of ​​the locking portion, so that the disassembly device has more space to operate the locking portion, thereby reducing the difficulty of disassembly;

[0150] (3) The buckle portion includes a long strip-shaped clamping arm, and the opening of the disassembly portion can be set at any position of the corresponding clamping arm and has a large opening area. The disassembly device can disassemble the buckle portion at any position of the clamping arm, which has a large operating space and is easier to operate;

[0151] (4) A limiting structure is provided at the proximal end of the storage tube to limit the displacement of the liner relative to the storage tube, thereby preventing the liner from escaping from the storage tube and avoiding failure of the connection between the buckle part and the engaging part due to excessive friction.

[0152] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other beneficial effects that may be obtained.

[0153] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, 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, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0154] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0155] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0156] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate 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 change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0157] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. A clamping device, characterized in that: include: A clamp device, the clamp device comprising a storage tube, a liner and a clamping assembly, the liner being arranged inside the storage tube, the liner comprising: A buckle portion, used for detachably connecting the liner and the storage tube; A locking portion, used to lock the clamping assembly; Wherein, the buckle portion and the locking portion are located at different circumferential positions relative to the receiving tube.

2. The clamping device according to claim 1, characterized in that: The clamping assembly includes a locked portion, the liner is connected to the storage tube, and when the locking portion cooperates with the locked portion, the clamp device is locked; when the connection between the liner and the storage tube is released, the clamp device is unlocked.

3. The clamping device according to claim 2, characterized in that: The locking portion includes at least one spring sheet, the distal end of the spring sheet is connected to the liner, and the proximal end of the spring sheet extends into the interior of the liner.

4. The clamping device according to claim 2, characterized in that: The clamping assembly includes a first clamp arm, a second clamp arm and a pin shaft, wherein the proximal end of the first clamp arm and the proximal end of the second clamp arm are connected via the pin shaft; the radial end of the pin shaft constitutes the locked portion, and the pin shaft is configured to cooperate with the locking portion when passing over the locking portion from the distal end to the proximal end.

5. The clamping device according to claim 1, characterized in that: The storage tube comprises a clamping portion, the buckle portion cooperates with the clamping portion, and the liner is connected to the storage tube.

6. The clamping device according to claim 5, characterized in that: The storage tube comprises a disassembly portion, the disassembly portion comprises at least one slot formed on a side wall of the storage tube, and the buckle portion is at least partially disposed inside the slot.

7. The clamping device according to claim 5, characterized in that: The engaging portion includes at least one hanging hole formed on the side wall of the storage tube, and the buckle portion includes at least one clamping arm and at least one protrusion, the proximal end of the clamping arm is a fixed end, the distal end of the clamping arm is a free end, the protrusion is arranged at the distal end of the clamping arm, the at least one protrusion is detachably matched with the at least one hanging hole, and the slot hole at least partially exposes the clamping arm.

8. The clamping device according to claim 1, characterized in that: The proximal end of the storage tube includes a limiting structure, and the limiting structure is configured to prevent the liner from escaping from the storage tube.

9. The clamping device according to claim 8, characterized in that: The storage tube includes an inner tube and an outer tube, at least a portion of the distal end of the inner tube is fixed to the inner side of the proximal end of the outer tube, the distal end of the inner tube constitutes the limiting structure, and the outer diameter of the liner is greater than the inner diameter of the inner tube.

10. The clamping device according to claim 9, characterized in that: The inner tube is provided with a blocking structure, which protrudes radially inward relative to the inner wall of the inner tube, and is configured to limit the movement of the clamping assembly from the distal end to the proximal end.

11. The clamping device according to claim 1, characterized in that: The clamping device also includes a conveying device, which includes a sheath and a core shaft moving in the sheath channel. The core shaft is releasably connected to the clamping assembly. The movement of the core shaft from the distal end to the proximal end drives the clamping assembly to move from the distal end to the proximal end relative to the receiving tube.

12. The clamping device according to claim 11, characterized in that The storage tube includes a first connection structure, and the conveying device also includes a second connection structure. The first connection structure cooperates with the second connection structure, and the conveying device is connected to the clamp device. The first connection structure is separated from the second connection structure, and the connection between the conveying device and the clamp device is released. The conveying device includes an end cover, the proximal end of the end cover is connected to the distal end of the sheath tube, the outer wall of the proximal end of the storage tube is formed with a step that is radially recessed inward, the first connecting structure is arranged at the proximal end of the step, the distal end of the end cover abuts against the turning point of the step, and the first connecting structure is located inside the end cover.

13. The clamping device according to claim 11, characterized in that: The conveying device also includes a handle, which includes a fixed part and a sliding part. The sliding part is movable relative to the fixed part, and the fixed part is arranged at the proximal end of the sheath tube. The sliding part is connected to the core shaft, and the movement of the sliding part drives the core shaft to move axially along the sheath tube; the core shaft includes a guide tube, and the proximal end of the guide tube is constructed in an L shape, and the proximal end of the guide tube is fixedly connected to the sliding part.

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