Clamp instrument and control method thereof

Abstract

The embodiment of the invention provides a clip instrument and a control method thereof. The clip instrument comprises a sheath tube, a clamping arm and a locking piece, the sheath tube comprises a channel, the clamping arm comprises at least two clamping parts, the at least two clamping parts have a locking state, the locking piece is used for limiting relative displacement of the at least two clamping parts in the locking state, and after the locking piece locks the at least two clamping parts, the locking piece is used for locking the at least two clamping parts. And the clamping parts and the at least two clamping parts are released from the sheath tube.

Description

Technical Field

[0001] This specification relates to the field of medical devices, and particularly to a clip device and a control method thereof. Background Art

[0002] An endoscopic hemostatic clip is a medical device used for hemostasis in endoscopic surgery. It is usually used during surgeries on internal organs such as the gastrointestinal tract and esophagus to control bleeding and maintain a clear surgical field. These clip devices play a crucial role in endoscopic surgery, helping to reduce surgical complications and improve the safety and effectiveness of the surgery. The design of endoscopic hemostatic clips needs to consider the special requirements of endoscopic surgery, allowing surgeons to operate precisely in a narrow surgical space; however, in actual clinical surgeries, there are risks such as damage to the surrounding tissues of the wound and incorrect wound positioning for the hemostatic clips. Summary of the Invention

[0003] One or more embodiments of this specification provide a clip device, including: a sheath tube, the sheath tube including a channel; clip arms, the clip arms including at least two clamping portions and at least two extending portions, the extending portions being releasably connected to the clamping portions; a locking member, the locking member being releasably disposed in the channel of the sheath tube and located between the at least two extending portions, the locking member being used to cooperate with the at least two clamping portions to make the at least two clamping portions in a locked state.

[0004] One or more embodiments of this specification provide a clip device, including: a sheath tube, the sheath tube including a channel; clip arms, the clip arms including at least two clamping portions, a clamping space being formed between the at least two clamping portions, a locked portion being provided on a side of the clamping portion facing the clamping space; a locking member, the locking member being releasably disposed in the channel of the sheath tube, the locking member being used to cooperate with the locked portion to make the at least two clamping portions in a locked state.

[0005] One or more embodiments of this specification provide a clip device, including: a sheath tube, the sheath tube including a channel and a resisting structure; clip arms, the clip arms including at least two clamping portions; a locking member, the locking member being releasably disposed in the channel of the sheath tube through the resisting structure, the locking member being used to lock the at least two clamping portions; the clip arms include an operating state and a release state, in the operating state, the locking member cooperates with the resisting structure and is located in the channel of the sheath tube, in the release state, the cooperation between the clamping portions and the locking member and the resisting structure is released and they are located outside the channel of the sheath tube.

[0006] One or more embodiments of this specification provide a control method for a clip instrument. The method is applied to the clip instrument described in any of the above embodiments. The control method includes: controlling at least two clamping portions of the clip arm to open; controlling the at least two clamping portions of the clip arm to close; controlling the clip arm to move from the distal end to the proximal end, and the at least two clamping portions cooperate with a locking member to lock the at least two clamping portions; wherein, when the clip arm moves from the distal end to the proximal end, the at least two clamping portions actuating the locking member to release from the sheath tube; controlling the at least two clamping portions and the locking member to release from the sheath tube.

[0007] According to the clip instrument in the above embodiments, by arranging the locking member in the sheath tube channel, the size of the locking member is reduced, and the size after the locking member cooperates with the clamping portion is also smaller. In some embodiments, by providing an extension portion and a locking member, the operation visual field of the operation is effectively improved, and the operation difficulty is reduced. In some embodiments, the locked portion is arranged on the side of the clamping portion facing the clamping space, without occupying the space outside the clamping portion, making the structure more compact and small after the clamping portion is closed, thereby reducing the operation visual field blocked by the clamping portion. In some embodiments, the locking member and the sheath tube are cooperated through a resisting structure. When the clamping portion performs the opening or closing operation, the clamping portion does not contact the locking member, and the movement of the clamping portion or other components (such as the extension portion, etc.) will not affect the connection stability of the locking member. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] This specification will be further described in the form of exemplary embodiments, and these exemplary embodiments will be described in detail through the drawings. These embodiments are not restrictive. In these embodiments, the same numbers represent the same structures, where:

[0009] Figure 1 is an exemplary structural diagram of a clip instrument shown according to some embodiments of this specification;

[0010] Figure 2 is an exemplary structural block diagram of a clip instrument shown according to some embodiments of this specification Figure 1 ;

[0011] Figure 3 is an exemplary structural block diagram of a clip instrument shown according to some embodiments of this specification Figure 2 ;

[0012] Figure 4 is an exemplary structural block diagram of a clip instrument shown according to some embodiments of this specification Figure 3 ;

[0013] Figure 5 is an exemplary structural exploded view of a clip arm and a delivery portion shown according to some embodiments of this specification;

[0014] Figure 6is a partial cross-sectional view of the clamping arm and the conveying part shown in some embodiments of this specification;

[0015] Figure 7A is an exemplary structural diagram of the clamping part shown in some embodiments of this specification;

[0016] Figure 7B is an exemplary side view of the clamping part shown in some embodiments of this specification;

[0017] Figure 7C is an exemplary structural diagram of the clamping part shown in some other embodiments of this specification;

[0018] Figure 8A is an exemplary structural diagram of the locking member shown in some embodiments of this specification;

[0019] Figure 8B is a partial cross-sectional view of the locking member shown in some embodiments of this specification;

[0020] Figure 9A is an exemplary structural diagram of the cooperation between the locking member and the clamping part shown in some embodiments of this specification;

[0021] Figure 9B is a cross-sectional view of the cooperation between the locking member and the clamping part shown in some embodiments of this specification;

[0022] Figure 10 is an exemplary structural diagram of the distal end of the sheath tube shown in some embodiments of this specification;

[0023] Figure 11A is an exemplary structural diagram of the cooperation between the locking member and the sheath tube shown in some embodiments of this specification;

[0024] Figure 11B is a cross-sectional view after the cooperation between the locking member and the sheath tube shown in some embodiments of this specification;

[0025] Figure 12A is an exemplary structure of the clamping arm locking process shown in some embodiments of this specification Figure 1 ;

[0026] Figure 12B is an exemplary structure of the clamping arm locking process shown in some embodiments of this specification Figure 2 ;

[0027] Figure 12C is an exemplary structure of the clamping arm locking process shown in some embodiments of this specification Figure 3 ;

[0028] Figure 12Dis an exemplary structure of the clamp arm locking process shown in some embodiments of this specification Figure 4 ;

[0029] Figure 13 is an exemplary structural diagram of the distal end of the sheath tube shown in some other embodiments of this specification;

[0030] Figure 14A is an exemplary structural diagram of the cooperation between the locking member and the sheath tube shown in some other embodiments of this specification;

[0031] Figure 14B is a cross-sectional view of the cooperation between the locking member and the sheath tube shown in some other embodiments of this specification;

[0032] Figure 15A is an exemplary structure of the clamp arm locking process shown in some other embodiments of this specification Figure 1 ;

[0033] Figure 15B is an exemplary structure of the clamp arm locking process shown in some other embodiments of this specification Figure 2 ;

[0034] Figure 15C is an exemplary structure of the clamp arm locking process shown in some other embodiments of this specification Figure 3 ;

[0035] Figure 16 is an exemplary structural diagram of the extension part shown in some embodiments of this specification;

[0036] Figure 17A is an exemplary structure of the cooperation between the clamping part and the extension part shown in some embodiments of this specification Figure 1 ;

[0037] Figure 17B is an exemplary structure of the cooperation between the clamping part and the extension part shown in some embodiments of this specification Figure 2 , where the locked part is hidden;

[0038] Figure 17C is an exemplary side view of the cooperation between the clamping part and the extension part shown in some embodiments of this specification;

[0039] Figure 18 is an exemplary structural diagram of the first pipe fitting of the sheath tube shown in some embodiments of this specification;

[0040] Figure 19 is an exemplary structural diagram of the second pipe fitting of the sheath tube shown in some embodiments of this specification;

[0041] Figure 20It is an exemplary structural diagram of the cooperation of the first pipe fitting, the second pipe fitting and the locking member shown in some embodiments of this specification;

[0042] Figure 21 It is an exemplary structural diagram of the second pipe fitting of the sheath tube shown in some other embodiments of this specification;

[0043] Figure 22 It is an exemplary structural diagram of the cooperation of the first pipe fitting, the second pipe fitting and the locking member shown in some other embodiments of this specification;

[0044] Figure 23A It is an exemplary structure of the clip arms of the clip instrument in the open state shown in some embodiments of this specification Figure 1 ;

[0045] Figure 23B It is an exemplary structure of the clip arms of the clip instrument in the open state shown in some embodiments of this specification Figure 2 ;

[0046] Figure 24A It is an exemplary structural diagram of the clip arms of the clip instrument in the closed state shown in some embodiments of this specification;

[0047] Figure 24B It is a partial cross-sectional view of the clip arms of the clip instrument in the closed state shown in some embodiments of this specification;

[0048] Figure 25A It is an exemplary structural diagram of the release of the locking member and the sheath tube shown in some embodiments of this specification;

[0049] Figure 25B It is a partial cross-sectional view of the release of the locking member and the sheath tube shown in some embodiments of this specification;

[0050] Figure 26A It is an exemplary structural diagram of the clamping part in the pre-locked state shown in some embodiments of this specification;

[0051] Figure 26B It is according to ​ a partial enlarged view of the clamping part in the pre-locked state shown in some embodiments;

[0052] ​ It is an exemplary structural diagram of the clip arms in the locked state shown in some embodiments of this specification;

[0053] ​ It is a partial cross-sectional view of the clip arms in the locked state shown in some embodiments of this specification;

[0054] ​ It is according to ​Partial enlarged view of the clamping arm in the locked state shown in some embodiments;

[0055] ​ is an exemplary structure of the clamping part and the locking member released from the sheath tube shown in some embodiments of this specification ​ ;

[0056] ​ is a partial cross-sectional view of the clamping part and the locking member released from the sheath tube shown in some embodiments of this specification;

[0057] ​ is an exemplary structure of the clamping part and the locking member released from the sheath tube shown in some embodiments of this specification ​ ;

[0058] ​ is an exemplary flowchart of the control method of the clip instrument shown in some embodiments of this specification.

[0059] Reference numerals are:

[0060] 10, clip instrument; 20, clamping space.

[0061] 100, clamping arm; 110, clamping part; 110-1, first clamping part; 110-2, second clamping part; 111, first connection structure; 120, extension part; 121, triggering part; 122, second connection structure; 130, locked part; 131, fixing part; 132, suspension structure; 133, first limiting structure; 134, second limiting structure; 135, actuating part.

[0062] 200, conveying part; 210, sheath tube; 211, resisting structure; 211-1, first resisting structure; 211-2, second resisting structure; 212, abutting part; 213, first pipe fitting; 214, second pipe fitting; 215, guiding groove; 216, guiding slider; 220, mandrel; 230, fixed section; 240, rotating section.

[0063] 300, control part; 310, fixed handle; 320, sliding handle.

[0064] 400, locking member; 410, accommodating cavity; 411, distal opening; 412, side opening; 420, first stopping structure; 430, second stopping structure; 440, contact part; 450, first matching part; 460, second matching part. Detailed implementation manners

[0065] To more clearly illustrate the technical solutions of the embodiments of this specification, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some examples or embodiments of this specification. For those of ordinary skill in the art, without creative efforts, this specification can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0066] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the said words can be replaced by other expressions.

[0067] As shown in this specification and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0068] Flowcharts are used in this specification to illustrate the operations performed by the systems according to the embodiments of this specification. It should be understood that the operations before or after do not necessarily need to be executed precisely in sequence. On the contrary, they can be executed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several operations can be removed from these processes.

[0069] The clip instrument is a common surgical instrument applied to the endoscope. During the operation, the clip instrument closes the tissue wound to stop bleeding. The traditional clip instrument includes a sheath, a clamping part and a receiving tube. After the clamping part clamps the tissue, the clamping part closes and moves from the distal end to the proximal end until it enters the receiving tube and is locked. The clamping part and the receiving tube are released from the sheath and remain at the wound position.

[0070] Due to the relatively long lengths of the clamping part and the receiving tube of the traditional clip instrument, the field of view around the wound will be blocked in a narrow surgical space, resulting in risks such as damage to the surrounding tissues and incorrect clamping by the operator due to poor visibility. Especially in the case where multiple clamping parts need to be released in a single operation, the clamping part and the receiving tube will block most of the field of view, increasing the surgical difficulty.

[0071] In view of this, in some embodiments of the present specification, it is desired to provide a clip instrument that reduces the size of the clamping portion remaining in the body and the field of view blocked by the clamping portion by various means such as arranging a locking member between a plurality of clamping portions or reducing the length of the clamping portion, enabling the operator to comprehensively and clearly observe the surgical area, thereby avoiding risks such as damaging surrounding tissues and incorrect clamping, and improving surgical safety.

[0072] ​ It is an exemplary structural diagram of the clip instrument 10 shown in some embodiments of the present specification.

[0073] As ​ shown, in some embodiments, the clip instrument 10 includes clip arms 100, a delivery portion 200, and a control portion 300. The control portion 300 is disposed at the proximal end of the delivery portion 200, and the clip arms 100 are disposed at the distal end of the delivery portion 200. The "proximal end" and "distal end" referred to in the embodiments of the present specification may represent directions, which refer to the axial direction of the clip instrument 10 (for example, the extending direction of the sheath 210 of the delivery portion 200 in the endoscopic channel). The side facing the operator is the "proximal end", and the side facing the side extending into the human body for treatment is the "distal end"; the "proximal end" and "distal end" may also represent partial structures located in the corresponding directions and should not be understood as only representing the ends.

[0074] In some application scenarios, the delivery portion 200 has good passability. The delivery portion 200 and the clip arms 100 at its distal end enter the human body through the endoscopic working channel to approach the tissue to be clamped, where the tissue refers to the organ tissue of the human body or other organisms. The control portion 300 is located outside the human body or other organisms, and the user controls the clip arms 100 to perform surgical operations by manipulating the control portion 300. For example, the clip arms 100 can clamp the wound of the tissue to keep the wound closed, thereby assisting the wound healing.

[0075] In some embodiments, the delivery portion 200 includes a sheath 210 and a mandrel 220. The mandrel 220 is disposed in the channel of the sheath 210 and extends along the axial direction of the sheath 210. The proximal end of the mandrel 220 is connected to the control portion 300, and the distal end of the mandrel 220 is connected to the clip arms 100. The "axial direction" and "radial direction" referred to in the embodiments of the present specification may represent directions. The "radial direction" is perpendicular to the "axial direction", or the axial direction is the extending direction of the channel of the sheath 210, and the radial direction is perpendicular to the extending direction of the channel of the sheath 210.

[0076] In some embodiments, the sheath 210 can be flexible and bendable in any direction. In some embodiments, the control unit 300 is composed of a fixed handle 310 and a sliding handle 320. The sliding handle 320 can axially slide relative to the fixed handle 310. The distal end of the sliding handle 320 is fixedly connected to the proximal end of the mandrel 220. The user controls the axial movement of the sliding handle 320 along the axis of the fixed handle 310 outside the body to control the axial movement of the mandrel 220 within the channel of the sheath 210, so that the clamping arms 100 complete corresponding surgical operations, such as opening, closing, locking, releasing and other surgical operations.

[0077] Embodiment 1 of this specification provides an exemplary clip instrument 10. The clip instrument 10 of Embodiment 1 will be described below in conjunction with ​ and elaborated.

[0078] ​ is an exemplary structural block diagram of the clip instrument 10 shown in some embodiments of this specification.

[0079] As ​ shown, in some embodiments, the clip instrument 10 includes a sheath 210, clamping arms 100 and a locking member 400.

[0080] In some embodiments, the sheath 210 includes a channel. In some embodiments, the channel of the sheath 210 is used to accommodate control structures such as the mandrel 220, and to accommodate at least a part (such as the extension 120) of the clamping arms 100, the locking member 400 and other structures.

[0081] In some embodiments, the clamping arms 100 include at least two clamping portions 110 and at least two extension portions 120. The extension portions 120 are releasably connected to the clamping portions 110. Among them, the "releasably connected" in the embodiments of this specification can mean that two components maintain a connected state when meeting preset conditions (for example, when the external force applied is less than a preset threshold), and are released and separated from each other when not meeting the preset conditions (for example, when the external force applied is greater than a preset threshold).

[0082] In some embodiments, the clamping portion 110 includes a first clamping portion 110-1 and a second clamping portion 110-2. When the clamping portion 110 is in an open state, the distal end of the first clamping portion 110-1 and the distal end of the second clamping portion 110-2 are separated, and the extension portion 120 can also separate the proximal end of the first clamping portion 110-1 and the proximal end of the second clamping portion 110-2, thereby providing the clamping portion 110 with a sufficiently large span to clamp more tissue. When the clamping portion 110 is locked, the distal end of the first clamping portion 110-1 and the distal end of the second clamping portion 110-2 abut against each other (or abut against the clamped tissue) and close, and the proximal end of the first clamping portion 110-1 and the proximal end of the second clamping portion 110-2 also abut against each other and close. In some embodiments, after the clamping portion 110 is locked, the extension portion 120 can be released from the clamping portion 110, and the extension portion 120 and the sheath 210 can be withdrawn from the endoscope channel, while the clamping portion 110 and the locking portion remain inside the body. The releasable connection between the clamping portion 110 and the extension portion 120 allows the extension portion 120 and the delivery portion 200, which are not in contact with tissue, to be withdrawn outside the body, while the smaller clamping portion 110 remains inside the body. This can reduce the size of the clamping portion 110 that remains inside the body, thereby reducing the surgical field obstructed by the clamping portion 110.

[0083] In some embodiments, the locking member 400 is releasably disposed within the passageway of the sheath 210 and between the at least two extensions 120. The locking member 400 is configured to engage with the at least two clamping portions 110 to lock the at least two clamping portions 110. In some embodiments, the locking member 400 is releasably engaged with the sheath 210. When subjected to an external force, the locking member 400 can be released from the sheath 210 and removed from the passageway of the sheath 210. In some embodiments, at least two passages are formed between the outer side of the locking member 400 and the inner wall of the passageway of the sheath 210, each of which allows an extension 120 to pass from the passageway of the sheath 210 to the outside of the sheath 210. The locking piece 400 is arranged in the channel of the sheath tube 210, which reduces the size of the locking piece 400, and the size of the locking piece 400 after being matched with the clamping part 110 is also smaller; by providing the extension part 120 and the locking piece 400, the retention length of the locking piece 400 and the clamping part 110 can be reduced by 30% to 70% compared with the traditional clamping part 110, effectively improving the operating field of view of the operation and reducing the difficulty of the operation; in addition, the locking piece 400 is arranged on the inner side of the extension part 120, which solves the problem of the limited opening angle of the extension part 120, that is, the opening angle of the extension part 120 is not limited by the locking piece 400, so that the clamping part 110 obtains a larger clamping space 20.

[0084] ​ is an exemplary structural block diagram of a clip device 10 according to other embodiments of the present specification.

[0085] like ​As shown, in some embodiments, the clip device 10 includes a sheath 210, clip arms 100, and a locking member 400.

[0086] In some embodiments, the sheath 210 includes a channel. In some embodiments, the channel of the sheath 210 is configured to accommodate control structures such as a mandrel 220, and structures such as at least a portion of the clip arms 100 and the locking member 400.

[0087] In some embodiments, the clip arms 100 include at least two clamping portions 110. A clamping space 20 is formed between the at least two clamping portions 110. A locked portion 130 is provided on a side of the clamping portion 110 facing the clamping space 20. In some embodiments, the clip arms 100 include an open state and a closed state. In the open state, the at least two clamping portions 110 are spaced apart from each other to allow tissue to enter the clamping space 20. In the closed state, the at least two clamping portions 110 move closer to each other to confine the tissue within the reduced clamping space 20, thereby closing the tissue wound.

[0088] In some embodiments, the locking member 400 is removably disposed within the channel of the sheath 210, and the locking member 400 is configured to cooperate with the locked portion 130 to keep the at least two clamping portions 110 in a locked state. Since the locked portion 130 is provided on a side of the clamping portion 110 facing the clamping space 20, that is, the locking member 400 locks the locked portion 130 inside the at least two clamping portions 110, without occupying the space outside the clamping portion 110, making the structure more compact and smaller after the clamping portions 110 are closed, thereby reducing the surgical field of view blocked by the clamping portions 110.

[0089] ​ is an exemplary structural block diagram of the clip device 10 according to still some other embodiments of the present specification.

[0090] As ​ As shown, in some embodiments, the clip device 10 includes a sheath 210, clip arms 100, and a locking member 400.

[0091] In some embodiments, the sheath 210 includes a channel. In some embodiments, the channel of the sheath 210 is configured to accommodate control structures such as a mandrel 220, and structures such as at least a portion of the clip arms 100 and the locking member 400.

[0092] In some embodiments, the clip arms 100 include at least two clamping portions 110. In some embodiments, the locking member 400 is configured to lock the at least two clamping portions 110. The at least two clamping portions 110 clamp the tissue wound through operations such as opening and closing.

[0093] In some embodiments, the sheath tube 210 includes a resisting structure 211, and the locking member 400 is releasably disposed in the channel of the sheath tube 210 through the resisting structure 211. In some embodiments, the resisting structure 211 can limit the movement of the locking member 400 along the axial direction of the sheath tube 210. The resisting structure 211 is configured to fail to limit the movement of the locking member 400 from the proximal end to the distal end due to fracture, displacement or deformation, so that the locking member 400 can be released from the sheath tube 210.

[0094] In some embodiments, the clamping arm 100 includes an operating state and a releasing state. In the operating state, the locking member 400 cooperates with the resisting structure 211 and is located in the channel of the sheath tube 210. In the releasing state, the cooperation between the locking member 400 and the resisting structure 211 is released and the locking member 400 is located outside the channel of the sheath tube 210. Among them, the operating state refers to the state in which the clamping arm 100 can be controlled by the mandrel 220, including but not limited to the open state, closed state, locked state, etc. of the clamping arm 100; the releasing state refers to the state in which the clamping portion 110 and the locking member 400 are separated from the sheath tube 210 and become independent components.

[0095] By disposing the locking member 400 in the channel of the sheath tube 210, the locking member 400 is more miniaturized, the space occupied by the locking member 400 is reduced, and the occlusion of the surgical field of view is reduced. The locking member 400 cooperates with the sheath tube 210 through the resisting structure 211. When the clamping portion 110 performs an opening or closing operation, the clamping portion 110 does not contact the locking member 400, and the movement of the clamping portion 110 or other components (such as the extension portion 120, etc.) will not affect the connection stability of the locking member 400.

[0096] The following combines ​ Some exemplary structures of the clip instrument 10 of the first embodiment will be described in detail. It should be noted that for those skilled in the art, various combinations and variations of the features in the following and previous embodiments can be made under the guidance of this specification, and these combinations and variations are still within the scope of this specification. In addition, some of the following described embodiments are only for illustration and explanation, and do not limit the scope of application of this specification.

[0097] ​ is an exemplary structural exploded view of the clamping arm 100 and the delivery portion 200 shown in some embodiments of this specification. ​ is a partial cross-sectional view of the clamping arm 100 and the delivery portion 200 shown in some embodiments of this specification.

[0098] As ​ and ​As shown, the clamping arm 100 includes a sheath tube 210, at least two clamping portions 110, at least two extension portions 120, and a locking member 400. In some embodiments, the locking member 400 is detachably disposed in the channel of the sheath tube 210. In some embodiments, the clamping portion 110 and the extension portion 120 are releasably connected. In some embodiments, the clamping portion 110 and the extension portion 120 are integrally formed.

[0099] In some embodiments, when the clamping arm 100 is in the open state, at least two clamping portions 110 are away from each other, and the distal ends of the extension portions 120 extend out of the channel of the sheath tube 210, so that the clamping portions 110 are located outside the channel of the sheath tube 210. The locking member 400 is located between at least two extension portions 120, and the locking portion and the sheath tube 210 are releasably engaged through a resisting structure 211.

[0100] In some embodiments, when the clamping arm 100 is in the closed state, at least two clamping portions 110 are close to each other and contact the locking member 400, the extension portions 120 are retracted into the channel of the sheath tube 210, and at least two clamping portions 110 still remain outside the channel of the sheath tube 210. During the process of operating the clamping portion 110 to clamp the tissue, the clamping portion 110 is always located outside the channel of the sheath tube 210, which can prevent the distal end of the sheath tube 210 from contacting the tissue, thereby improving the clamping stability of the tissue in the clamping space 20.

[0101] In some embodiments, when the clamping arm 100 is in the locked state, at least two clamping portions 110 cooperate with the locking member 400. For example, the proximal end of the clamping portion 110 or the locked portion 130 forms a limiting cooperation with the locking member 400 to lock at least two clamping portions 110. After at least two clamping portions 110 are closed, the locking member 400 is released from the sheath tube 210, so that the locking member 400 can be withdrawn from the distal end of the sheath tube 210. In some embodiments, when the clamping arm 100 is in the locked state, the locking member 400 is located between at least two clamping portions 110, then the locking member 400 does not need to occupy the space outside the clamping portion 110, reducing the occlusion of the surgical field of view by the clamping portion 110.

[0102] In some embodiments, when the clamping arm 100 is in the released state, after the locking member 400 locks at least two clamping portions 110, the whole is released from the distal end of the sheath tube 210 and stays at the tissue wound, and other components such as the sheath tube 210 are withdrawn from the human body.

[0103] In some embodiments, the sheath 210 includes a fixed section 230 and a rotating section 240. The proximal end of the rotating section 240 is rotatably connected to the distal end of the fixed section 230, and the rotating section 240 is configured to rotate about the axis of the sheath 210. In some embodiments, one of the rotating section 240 and the fixed section 230 is provided with an annular groove, and the other is provided with a slider. The annular slider and the annular groove are slidably engaged to enable the rotating section 240 to rotate relative to the fixed section 230. In some embodiments, the annular groove extends along the circumferential direction of the sheath 210, and the annular slider is embedded in the annular groove to limit the axial displacement of the rotating section 240 and the fixed section 230 relative to the sheath 210. In some embodiments, the operating handle controls the rotation of the mandrel 220, and the rotation of the mandrel 220 drives the clamping arms 100 and the rotating section 240 to rotate relative to the fixed section 230 simultaneously. By providing the rotating section 240, the clamping arms 100 can rotate about the axis of the sheath 210, which can more conveniently adjust the closing direction of at least two clamping portions 110 to be consistent with the closing direction of the tissue wound, and improve the accuracy of clamping the tissue wound.

[0104] In some embodiments, the sheath 210 is an integrally formed structure, which is convenient for processing and saves costs.

[0105] ​ is an exemplary structural diagram of the clamping portion 110 shown in some embodiments of this specification. ​ is an exemplary side view of the clamping portion 110 shown in some embodiments of this specification. ​ is an exemplary structural diagram of the clamping portion 110 shown in some other embodiments of this specification. ​ is an exemplary structural diagram of the locking member 400 shown in some embodiments of this specification. ​ is a partial cross-sectional view of the locking member 400 shown in some embodiments of this specification. ​ is an exemplary structural diagram of the locking of the locking member 400 and the clamping portion 110 shown in some embodiments of this specification. ​ is a cross-sectional view of the locking of the locking member 400 and the clamping portion 110 shown in some embodiments of this specification.

[0106] As ​ shown, in some embodiments, the clamping portion 110 includes a locked portion 130, and the locking member 400 is used to cooperate with the locked portion 130. In some embodiments, the locking member 400 includes a receiving cavity 410, and the receiving cavity 410 is used to receive the locked portions 130 of at least two clamping portions 110 to keep the locked portions 130 of at least two clamping portions 110 in a closed state. In some embodiments, the receiving cavity 410 is provided at the distal end of the locking member 400 and has a distal opening 411. When the locked portion 130 moves from the distal end to the proximal end, it enters the receiving cavity 410 from the distal opening 411.

[0107] In some embodiments, the locked portion 130 includes a fixing portion 131 and a suspension structure 132. The suspension structure 132 is arranged at a gap with the clamping portion 110 through the fixing portion 131, and the suspension structure 132 is located in the receiving cavity 410 when the clamping arms 100 are locked. One side of the fixing portion 131 is connected to the side edge of the clamping portion 110, and the other side is connected to the suspension structure 132, so that a gap is maintained between the suspension structure 132 and the clamping portion 110. In some embodiments, both sides of the receiving cavity 410 of the locking member 400 have side openings 412. When the locked portion 130 cooperates with the locking member 400, the side openings 412 of the receiving cavity 410 avoid the fixing portion 131, so that the suspension structure 132 of the locked portion 130 can be located in the receiving cavity 410, and the distal portion of the locking member 400 is located in the gap between the suspension structure 132 and the clamping portion 110. In this way, the locking member 400 can lock the locked portion 130 between at least two clamping portions 110 without occupying the outer space of the clamping portion 110.

[0108] In some embodiments, the receiving cavity 410 of the locking member 400 is configured such that the suspension structures 132 of the locked portions 130 of at least two clamping portions 110 can be kept in a mutually attached state, so that at least two clamping portions 110 maintain a stable locked state.

[0109] In some embodiments, the locked portion 130 includes a first limiting structure 133, and the locking member 400 includes a first stopping structure 420. The first limiting structure 133 cooperates with the first stopping structure 420 to limit the relative movement between the clamping portion 110 and the locking member 400 in a first direction. Wherein, the first direction includes the direction indicated by the arrow D1 in the attachment ​ For example, the width direction of the clamping portion 110. By restricting the relative movement between the clamping portion 110 and the locking member 400 in the first direction, at least two clamping portions 110 can maintain a relatively stationary state in the first direction, so that at least two clamping portions 110 will not undergo relative side turning.

[0110] In some embodiments, the first limiting structure 133 includes a limiting pin, and the first stopping structure 420 includes a stopping groove. The limiting pin is configured to cooperate with the stopping groove. In some embodiments, the limiting pin protrudes from the proximal end of the suspension structure 132, and the stopping groove is recessed from the bottom wall of the proximal end of the receiving cavity 410. After the limiting pin is inserted into the stopping groove, the stopping groove can limit the circumferential direction of the limiting pin.

[0111] In some embodiments, the locked part 130 includes a second limiting structure 134, and the locking member 400 includes a second stopping structure 430. The second limiting structure 134 cooperates with the second stopping structure 430 to limit the relative movement between the clamping part 110 and the locking member 400 in a second direction, where the second direction is arranged non-parallel to the first direction. Exemplarily, the second direction includes the direction indicated by arrow D2 in the drawing, such as the length direction of the clamping part 110. By limiting the relative movement between the clamping part 110 and the locking member 400 in the second direction, at least two clamping parts 110 can maintain a relatively static state in the second direction. The locking member 400 locks the clamping part 110 in multiple directions through multiple stopping structures, improving the stability of the clamping part 110 for clamping tissue.

[0112] In some embodiments, the second limiting structure 134 includes a locking spring piece, and the second stopping structure 430 includes at least two locking recesses. The locking spring piece is configured to snap into the locking recess when aligned with the locking recess. In some embodiments, the locking spring piece is disposed on the suspension structure 132, and the proximal end of the locking spring piece is connected to the suspension structure 132. The distal end includes a bent portion that bends from the suspension structure 132 towards the clamping part 110. The locking recess is disposed on the side wall of the receiving cavity 410. When the locking spring piece moves from the distal end to the proximal end, the bent portion of the locking spring piece snaps into the locking recess to form a limit.

[0113] In some embodiments, the locking member 400 includes a contact part 440. The contact part 440 is located on the distal side of the second stopping structure 430. The contact part 440 is used to provide a feedback resistance to prompt the operator to enter the locked state. In some embodiments, the distal end face of the locking member 400 is configured as the contact part 440.

[0114] In some embodiments, the clamping arm 100 includes a pre-locked state and a final locked state.

[0115] In the pre-locked state, the second limiting structure 134 of the locked part 130 abuts against the contact part 440 of the locking member 400, and generates a feedback resistance that prevents the clamping part 110 from moving from the distal end to the proximal end. In some embodiments, the second limiting structure 134 includes a locking elastic piece. Before the distal bending part of the locking elastic piece enters the accommodation cavity 410, it abuts against the contact part 440 of the locking member 400. Then, the contact part 440 generates a feedback resistance on the locking elastic piece, and this feedback resistance is fed back to the operator through the mandrel 220, prompting the operator that the clamping part 110 is about to enter the locked state. In some embodiments, after feeling the feedback resistance, the operator can confirm again the clamping condition of the clamping part 110 on the tissue. If the clamping part 110 does not clamp the tissue properly, the mandrel 220 is pushed from the proximal end to the distal end, so that the clamping part 110 is changed from the closed state to the open state to re-clamp the tissue; if the clamping part 110 clamps the tissue properly, the mandrel 220 is pulled from the distal end to the proximal end, so that the locking elastic piece is deformed by the force, and the bending part crosses the contact part 440 and enters the accommodation cavity 410 to cooperate with the locking recess, and the clamping part 110 enters the final locked state. By setting the contact part 440 and the second stop structure 430 to form a feedback resistance, it can prompt the operator to confirm the tissue clamping condition before locking, and reduce surgical errors.

[0116] In the final locked state, the second limiting structure 134 crosses the contact part 440 and cooperates with the second stop structure 430, the first limiting structure 133 cooperates with the first stop structure 420, and at least two clamping parts 110 are locked.

[0117] ​ It is an exemplary structural diagram of the distal end of the sheath tube 210 shown in some embodiments of this specification. ​ It is an exemplary structural diagram of the cooperation between the locking member 400 and the sheath tube 210 shown in some embodiments of this specification. ​ It is a cross-sectional view after the cooperation between the locking member 400 and the sheath tube 210 shown in some embodiments of this specification.

[0118] As ​ 、 ​ 、 ​ As shown, in some embodiments, the sheath tube 210 or the rotating section 240 of the sheath tube 210 is an integrally formed structure, making the processing more convenient. In some embodiments, the sheath tube 210 includes at least one resisting structure 211, and the resisting structure 211 is used to limit the locking member 400 in the channel of the sheath tube 210.

[0119] In some embodiments, the sheath 210 includes a first resisting structure 211-1, and the locking member 400 includes a first mating portion 450. The first resisting structure 211-1 mates with the first mating portion 450 to limit the movement of the locking member 400 relative to the sheath 210 from the distal end towards the proximal end, enabling the locking member 400 to be held in a desired position, such as the distal end of the sheath 210.

[0120] In some embodiments, the first resisting structure 211-1 includes a stop step that protrudes radially inwards, and the proximal surface of the locking member 400 constitutes the first mating portion 450, with the proximal surface abutting and mating with the stop step. In some embodiments, the stop step includes, but is not limited to, at least two protrusions, a retaining rod arranged radially along the sheath 210, etc.

[0121] In some embodiments, the sheath 210 includes a second resisting structure 211-2, and the locking member 400 includes a second mating portion 460. The second resisting structure 211-2 is releasably connected to the second mating portion 460 to limit the movement of the locking member 400 relative to the sheath 210 from the proximal end towards the distal end. When the locking member 400 locks at least two clamping portions 110, the second resisting structure 211-2 is separated from the second mating portion 460, and the locking member 400 is released from the sheath 210.

[0122] In some embodiments, the second resisting structure 211-2 includes a limiting elastic piece. The distal end of the limiting elastic piece is connected to the inner wall of the sheath 210, and the proximal end protrudes radially inwards from the inner wall of the sheath 210. The locking member 400 includes a limiting surface facing the distal end, and the limiting surface is used to cooperate with the limiting elastic piece. In some embodiments, the limiting surface of the locking member 400 includes the bottom surface of the receiving cavity 410. The limiting elastic piece is arranged corresponding to the side opening 412 of the receiving cavity 410 of the locking member 400, enabling the limiting elastic piece to cooperate with the bottom surface of the receiving cavity 410. In some embodiments, the limiting surface of the locking member 400 includes the surface at the distal end of the locking member 400.

[0123] Combined ​ 、 ​ As shown in, in some embodiments, the clamping arm 100 includes an actuating portion 135. When the actuating portion 135 is configured to move from the distal end towards the proximal end, it can actuate the release of the second resisting structure 211-2 and the second mating portion 460, causing the locking member 400 to be released from the sheath 210. Among them, the actuating portion 135 refers to a component or part that can directly or indirectly cause the release of the second resisting structure 211-2 and the second mating portion 460. By providing the actuating portion 135 to actuate the release of the locking member 400 from the sheath 210, it is possible to avoid disturbing the locking member 400 by other components or parts during movement and reduce the risk of accidental release of the locking member 400.

[0124] In some embodiments, the actuating part 135 is provided on the locked part 130. Exemplarily, the actuating part 135 is provided on the suspension structure 132 of the locked part 130, and the actuating part 135 includes the edge part on at least one side of the suspension structure 132. In some embodiments, one side edge of the suspension structure 132 constitutes the actuating part 135. In some embodiments, the two side edges of the suspension structure 132 constitute the actuating part 135.

[0125] In some embodiments, during the process that the locked part 130 of the clamping part 110 enters the locking member 400, the actuating part 135 pushes the limiting elastic piece from the distal end to the proximal end, causing the limiting elastic piece to deform, displace or break and release from the limiting surface, and the locking member 400 and the sheath 210 are released. In some embodiments, the proximal end of the limiting elastic piece cooperates with the limiting surface. After the suspension structure 132 of the locking part enters the accommodation cavity 410, the actuating part 135 pushes the limiting elastic piece to deform or displace radially outward relative to the sheath 210, causing the limiting elastic piece to release from the limiting surface.

[0126] In some embodiments, after the proximal end of the limiting elastic piece cooperates with the limiting surface, in the radial direction of the sheath 210, the distance between the first limiting structure 133 and the actuating part 135 is greater than the distance from the first stopping structure 420 to the limiting elastic piece. After the actuating part 135 enters the locking member 400, it can radially expand the limiting elastic piece outward along the sheath 210, causing the limiting elastic piece to disengage from the limiting surface.

[0127] In some embodiments, after the first limiting structure 133 of the clamping part 110 and the first stopping structure 420 cooperate, and at the same time the second limiting structure 134 and the second stopping structure 430 cooperate, the clamping part 110 and the locking member 400 are locked; after the actuating part 135 of the clamping part 110 pushes the limiting elastic piece to release from the limiting surface, the locking member 400 and the sheath 210 are released. In some embodiments, when the first limiting structure 133 and the first stopping structure 420 cooperate, and at the same time the second limiting structure 134 and the second stopping structure 430 cooperate, and the actuating part 135 pushes the limiting elastic piece to release from the limiting surface, then the locking member 400 is locked with the clamping part 110 and released from the sheath 210 at the same time. In some embodiments, after the actuating part 135 pushes the limiting elastic piece to release from the limiting surface, then the first limiting structure 133 and the first stopping structure 420 cooperate, and the second limiting structure 134 and the second stopping structure 430 cooperate, then the locking member 400 is first released from the sheath 210 and then locked with the clamping part 110.

[0128] ​ It is an exemplary structural diagram of the locking process of the clamping arm 100 shown in some embodiments of this specification. During this process, the locking member 400 is locked with the clamping part 110 and released from the sheath 210 at the same time.

[0129] In some embodiments, the second resisting structure 211 - 2 of the sheath tube 210 includes a limiting spring piece, which is constructed in a straight line and extends obliquely inward from the distal end to the proximal end of the sheath tube 210 .

[0130] like ​ and ​ As shown, the clamp arm 100 is in a pre-locking state, the second limiting structure 134 of the locked part 130 abuts against the contact part 440, the actuating part 135 of the clamping part 110 is located at the distal end of the second resisting structure 211-2 of the sheath 210, and the proximal end of the second resisting structure 211-2 cooperates with the second mating part 460 of the locking member 400.

[0131] like ​ and ​ As shown, the clamping part 110 moves from the distal end to the proximal end, and the clamping arm 100 switches from the pre-locking state to the locking state. The first limiting structure 133 of the locked part 130 cooperates with the first stop structure 420 of the locking member 400, and the second limiting structure 134 of the locked part 130 cooperates with the second stop structure 430 of the locking member 400. At the same time, the actuating part 135 of the clamping part 110 moves to the proximal end of the second supporting structure 211-2 of the sheath 210, and expands the proximal end of the second supporting structure 211-2 until it is released from the second matching part 460 of the locking member 400, and the locking member 400 is released from the sheath 210.

[0132] ​ 2 is an exemplary structural diagram of the distal end of the sheath tube 210 according to other embodiments of the present specification. ​ 2 is an exemplary structural diagram of the locking member 400 and the sheath tube 210 according to other embodiments of this specification. ​ It is a cross-sectional view of the locking member 400 and the sheath tube 210 according to other embodiments of this specification.

[0133] like ​ As shown, in some embodiments, the second retaining structure 211-2 of the sheath tube 210 includes a limiting spring piece, which is configured as a broken line. The broken line limiting spring piece includes an inclined section and a straight section, and the proximal end of the inclined section is connected to the distal end of the straight section, wherein the connection between the inclined section and the straight section is configured as a bending point. In some embodiments, the inclined section extends inwardly from the distal end to the proximal end of the sheath tube 210, and the straight section is arranged parallel to the axis of the sheath tube 210. The proximal end of the straight section is used to cooperate with the second mating portion 460 of the locking member 400.

[0134] ​ FIG. 4 is an exemplary structural diagram of the locking process of the clamp arm 100 according to other embodiments of the present disclosure. In this process, the locking member 400 and the sheath tube 210 are first released and then locked with the clamping portion 110 .

[0135] As ​ shown, the clamping arm 100 is in a pre-locked state. The second limiting structure 134 of the locked part 130 abuts against the contact part 440. The actuating part 135 of the clamping part 110 moves to the distal end of the second resisting structure 211-2 of the sheath 210. The proximal end of the second resisting structure 211-2 cooperates with the second cooperating part 460 of the locking part 400.

[0136] As ​ shown, the clamping part 110 moves from the distal end to the proximal end, and the locking part 400 is released from the sheath 210. After the actuating part 135 moves from the distal end to the proximal end, by squeezing the bending point of the second resisting structure 211-2, the straight section of the second resisting structure 211-2 deforms or displaces radially outward along the sheath 210, so that the proximal end of the second resisting structure 211-2 is released from the second cooperating part 460 of the locking part 400, and the locking part 400 is released from the sheath 210. At this time, the first limiting structure 133 of the locked part 130 does not cooperate with the first stopping structure 420 of the locking part 400, and the second limiting structure 134 of the locked part 130 does not cooperate with the second stopping structure 430 of the locking part 400.

[0137] As ​ shown, the clamping part 110 continues to move from the distal end to the proximal end, and the clamping arm 100 is switched from the pre-locked state to the locked state. The first limiting structure 133 of the locked part 130 cooperates with the first stopping structure 420 of the locking part 400, and the second limiting structure 134 of the locked part 130 cooperates with the second stopping structure 430 of the locking part 400. The clamping part 110 is locked with the locking part 400.

[0138] In some embodiments, the locking part 400 is first locked with the clamping part 110 and then released from the sheath 210. In some embodiments, the second cooperating part 460 of the locking part 400 includes a limiting recess, and the limiting recess is provided on the side surface of the locking part 400 facing the extension part 120. The second resisting structure 211-2 of the sheath 210 includes an elastic pin, and the elastic pin is provided on the side wall of the sheath 210 close to the extension part 120. An axially extending avoidance groove is formed on the extension part 120, and the avoidance groove is used to avoid the elastic pin. The elastic pin passes through the avoidance groove of the extension part 120 and cooperates with the limiting recess of the locking part 400, so that the locking part 400 is releasably connected to the sheath 210. After the locking part 400 is locked with the clamping part 110, the extension part 120 continues to move from the distal end to the proximal end, so that the end of the avoidance groove of the extension part 120 actuates the elastic pin, and the elastic pin deforms, displaces or breaks and is released from the limiting recess. At this time, the locking part 400 is released from the sheath 210.

[0139] ​ is an exemplary structural diagram of the extension part 120 shown according to some embodiments of the present specification. ​It is an exemplary structure of the cooperation between the clamping part 110 and the extension part 120 shown in some embodiments of this specification. ​ . ​ It is an exemplary structure of the cooperation between the clamping part 110 and the extension part 120 shown in some embodiments of this specification. ​ , wherein the locked part 130 is hidden. ​ It is an exemplary side view of the cooperation between the clamping part 110 and the extension part 120 shown in some embodiments of this specification.

[0140] In some embodiments, the extension part 120 or the clamping part 110 includes a trigger part 121, which is configured to trigger the release of the extension part 120 and the clamping part 110 when a force in the first direction and greater than a preset force value is applied; wherein, the first direction is not parallel to the movement direction of the extension part 120, and in the drawing, the first direction is the direction indicated by the arrow D1. In some embodiments, the first direction may include the width direction of the clamping part 110. In some other embodiments, the first direction may also include a direction at an angle to the width direction of the clamping part 110. During the process of the extension part 120 driving the clamping part 110 to move from the distal end to the proximal end, when operating to lock the clamping part 110 and operating to release the locking member 400 from the sheath 210, a pulling force in the movement direction of the extension part 120 will be generated between the extension part 120 and the clamping part 110. By providing the trigger part 121, the extension part 120 can be released from the clamping part 110 only when triggered by the trigger part 121, which can avoid accidental detachment of the two due to the pulling force in the movement direction between the extension part 120 and the clamping part 110, and reduce the surgical risk.

[0141] In some embodiments, a clamping space 20 is formed between at least two clamping parts 110. A first connection structure 111 is provided on one side of the clamping part 110 facing the clamping space 20. The distal end of the extension part 120 includes a second connection structure 122, and the first connection structure 111 and the second connection structure 122 are releasably connected. In some embodiments, the first connection structure 111 includes, but is not limited to, structures such as a clamping groove, a limiting protrusion, a snap buckle, etc. protruding from the clamping part 110 into the clamping space 20; the second connection structure 122 includes, but is not limited to, structures such as a hook, an elastic limiting support arm, etc. In some embodiments, the first connection structure 111 is arranged in the gap between the suspension structure 132 of the locked part 130 and the clamping part 110, making the structure of the clamping part 110 more compact and facilitating the miniaturization of the clamping part 110.

[0142] In some embodiments, the second connection structure 122 includes two elastic arms. Each elastic arm includes a distal end portion, an intermediate portion, and a proximal end portion. The intermediate portion of the elastic arm is configured as a groove. The first connection structure 111 includes a buckle, which is configured as a U-shaped structure protruding towards the clamping space 20. The two elastic arms pass through the buckle, and the buckle is fitted into the groove of the intermediate portion. The distal end portion and the proximal end portion respectively limit the buckle, so that the clamping portion 110 is connected to the extension portion 120.

[0143] In some embodiments, the inner side surface of the distal end of the groove fits and limits the distal surface of the buckle, and both the inner side surface of the distal end of the groove and the distal surface of the buckle are perpendicular to the axial direction of the extension portion 120. The axial direction of the extension portion 120 may be the direction indicated by the arrow D2 in the attachment. ​ When the extension portion 120 moves from the distal end to the proximal end, the inner side surface of the distal end of the groove and the distal surface of the buckle form a limit, so that the clamping portion 110 and the extension portion 120 remain connected, and accidental separation of the clamping portion 110 and the extension portion 120 due to axial force is avoided.

[0144] In some embodiments, the inner side surface of the proximal end of the groove fits and limits the proximal surface of the buckle, and both the inner side surface of the proximal end of the groove and the proximal surface of the buckle are perpendicular to the axial direction of the extension portion 120. The axial direction of the extension portion 120 may be the direction indicated by the arrow D2 in the attachment. ​ When the extension portion 120 moves from the proximal end to the distal end, the inner side surface of the proximal end of the groove and the proximal surface of the buckle form a limit, so that the clamping portion 110 and the extension portion 120 remain connected, and accidental separation of the clamping portion 110 and the extension portion 120 due to axial force is avoided when they are pulled against each other.

[0145] In some embodiments, the trigger portion 121 is provided on the first connection structure 111 or the second connection structure 122. The distal end of the sheath 210 includes an abutting portion 212, and the abutting portion 212 is used to drive the trigger portion 121, so that one of the first connection structure 111 and the second connection structure 122 breaks, deforms or displaces and releases from the other. In some embodiments, the trigger portion 121 includes an inclined surface provided at the proximal end of the elastic arm. The inclined surface is configured such that the force applied by the abutting portion 212 to the inclined surface after abutting can cause the two elastic arms to deform and approach each other, so that the buckle disengages from the groove of the elastic arm, and the extension portion 120 and the clamping portion 110 are released. In some embodiments, the abutting portion 212 includes, but is not limited to, the end face of the distal end of the sheath 210 or a protrusion provided at the distal end of the sheath 210.

[0146] Embodiment II of this specification provides an exemplary clip instrument 10. The following is combined with ​The clip device 10 of the second embodiment will be described. Among them, in the following text, only the parts of the clip device 10 of the second embodiment that are different from the clip device 10 of the first embodiment will be described, and the other parts not mentioned will refer to the exemplary embodiments of the clip device 10 of the first embodiment.

[0147] ​ It is an exemplary structural diagram of the first pipe fitting 213 of the sheath 210 shown in some embodiments of the present specification. ​ It is an exemplary structural diagram of the second pipe fitting 214 of the sheath 210 shown in some embodiments of the present specification. ​ It is an exemplary structural diagram of the cooperation of the first pipe fitting 213, the second pipe fitting 214 and the locking member 400 shown in some embodiments of the present specification.

[0148] As ​ shown, in some embodiments, the sheath 210 or the rotating section 240 of the sheath 210 is a split-molded structure. In some embodiments, the sheath 210 includes at least one resisting structure 211, and the resisting structure 211 is used to limit the locking member 400 within the channel of the sheath 210.

[0149] In some embodiments, the sheath 210 includes a first pipe fitting 213 and a second pipe fitting 214, and the first pipe fitting 213 is axially movable in cooperation with the second pipe fitting 214. In some embodiments, one of the first pipe fitting 213 and the second pipe fitting 214 includes a guiding groove 215 arranged along the axial direction, and the other includes a guiding slider 216. The guiding slider 216 is slidably engaged with the guiding groove 215 to limit the circumferential displacement between the first pipe fitting 213 and the second pipe fitting 214, prevent the first pipe fitting 213 and the second pipe fitting 214 from rotating relative to each other and affecting their internal structures, and moreover, the guiding groove 215 limits the stroke range of the guiding slider 216, that is, the axial movement range of the first pipe fitting 213 and the second pipe fitting 214 is limited within a reasonable range to prevent the first pipe fitting 213 and the second pipe fitting 214 from separating from each other.

[0150] In some embodiments, the first pipe fitting 213 is disposed at the proximal end of the second pipe fitting 214, and the outer diameter of the first pipe fitting 213 is equal to the inner diameter of the second pipe fitting 214, so that the second pipe fitting 214 is sleeved outside the first pipe fitting 213. When the second pipe fitting 214 axially moves relative to the first pipe fitting 213, the second pipe fitting 214 will not interfere with the components (such as the locking member 400, the extension portion 120, etc.) inside the first pipe fitting 213. In some embodiments, the first pipe fitting 213 and the second pipe fitting 214 maintain relative static by static friction, and when the axial external force received is greater than the static friction, the first pipe fitting 213 and the second pipe fitting 214 have relative displacement.

[0151] Combined with ​ and ​As shown, in some embodiments, the sheath tube 210 includes a first resisting structure 211-1, and the locking member 400 includes a first engaging portion 450. The first resisting structure 211-1 cooperates with the first engaging portion 450 to limit the movement of the locking member 400 relative to the sheath tube 210 from the distal end to the proximal end, so that the locking member 400 can be maintained at a desired position, such as the distal end of the sheath tube 210.

[0152] In some embodiments, the first resisting structure 211-1 is disposed inside the first pipe fitting 213. The first resisting structure 211-1 includes a stop step protruding radially inward. The proximal surface of the locking member 400 constitutes the first engaging portion 450, and the proximal surface abuts and cooperates with the stop step. In some embodiments, the stop step includes, but is not limited to, at least two protrusions, a stop rod arranged along the radial direction of the sheath tube 210, etc.

[0153] In some embodiments, the sheath tube 210 includes a second resisting structure 211-2, and the locking member 400 includes a second engaging portion 460. The second resisting structure 211-2 is releasably connected to the second engaging portion 460 to limit the movement of the locking member 400 relative to the sheath tube 210 from the proximal end to the distal end, so that after the locking member 400 locks at least two clamping portions 110, it can be released from the sheath tube 210.

[0154] In some embodiments, the second resisting structure 211-2 is disposed on the second pipe fitting 214. In some embodiments, the second resisting structure 211-2 includes a limiting piece. The proximal end of the limiting piece is connected to the second pipe fitting 214, and the distal end protrudes radially inward from the inner wall of the second pipe fitting 214. The second engaging portion 460 of the locking member 400 includes a limiting surface facing the distal end, and the limiting surface is used to cooperate with the limiting piece.

[0155] In some embodiments, the actuating portion 135 is configured to actuate the second pipe fitting 214 to move relative to the first pipe fitting 213 from the distal end to the proximal end, so that the second resisting structure 211-2 is deformed, displaced or broken and released from the second engaging portion 460. In some embodiments, the actuating portion 135 includes the proximal surface of the clamping portion 110. When the extending portion 120 drives the clamping portion 110 to move from the distal end to the proximal end, the proximal end of the clamping portion 110 abuts against the surface of the distal end of the second pipe fitting 214 and pushes the second pipe fitting 214 to move relative to the first pipe fitting 213 from the distal end to the proximal end. The limiting piece has a tendency to move proximally relative to the locking member 400, so that the limiting piece is stressed and deformed, displaced or broken and released from the limiting surface of the locking member 400. At this time, the locking member 400 is released from the sheath tube 210.

[0156] In some embodiments, the distance between the second blocking structure 211-2 and the distal end of the second pipe fitting 214 is configured such that while the locking member 400 is locked with the clamping portion 110, the locking member 400 is released from the second pipe fitting 214. For example, when the second pipe fitting 214 is connected to the locking member 400, the distal end of the locking member 400 can be exposed beyond the distal end of the second pipe fitting 214. When the locked portion 130 contacts the locking member 400, the actuating portion 135 of the clamping portion 110 contacts the distal end of the second pipe fitting 214. When the clamping portion 110 continues to move from the distal end towards the proximal end, the first limiting structure 133 of the locked portion 130 cooperates with the first stopping structure 420 of the locking member 400, and the second limiting structure 134 of the locked portion 130 cooperates with the second stopping structure 430 of the locking member 400, so that the clamping portion 110 is locked with the locking member 400. At the same time, the actuating portion 135 drives the second pipe fitting 214 to move from the distal end towards the proximal end, separating the second blocking structure 211-2 from the second mating portion 460 of the locking member 400, and releasing the locking member 400 from the sheath 210.

[0157] ​ It is an exemplary structural diagram of the second pipe fitting 214 of the sheath 210 shown in some other embodiments of this specification. ​ It is an exemplary structural diagram of the cooperation of the first pipe fitting 213, the second pipe fitting 214 and the locking member 400 shown in some other embodiments of this specification.

[0158] As ​ 、 ​ and ​ shown, in some embodiments, the distance between the second blocking structure 211-2 and the distal end of the second pipe fitting 214 is configured such that after the locking member 400 is released from the second pipe fitting 214, the locking member 400 is locked with the clamping portion 110. For example, when the second pipe fitting 214 is connected to the locking member 400, the entire locking member 400 is received inside the second pipe fitting 214. When the clamping portion 110 is closed, the actuating portion 135 of the clamping portion 110 first contacts the distal end of the second pipe fitting 214. The actuating portion 135 drives the second pipe fitting 214 to move from the distal end towards the proximal end, separating the second blocking structure 211-2 from the second mating portion 460 of the locking member 400, and releasing the locking member 400 from the sheath 210. The clamping portion 110 continues to move from the distal end towards the proximal end, so that the first limiting structure 133 of the locked portion 130 cooperates with the first stopping structure 420 of the locking member 400, and the second limiting structure 134 of the locked portion 130 cooperates with the second stopping structure 430 of the locking member 400, and the clamping portion 110 is locked with the locking member 400.

[0159] ​It is an exemplary structural diagram of the operation process of the clip instrument 10 shown in some embodiments of this specification. This operation process can be applied to any of the clip instruments 10 in the first embodiment and the clip instruments 10 in the second embodiment.

[0160] As ​ and ​ shown, the clip arms 100 are in an open state. In some embodiments, the operation part controls the mandrel 220 to move from the proximal end to the distal end. The mandrel 220 drives the extension part 120 and the clamping part 110 to move from the proximal end to the distal end, so that the distal end of the extension part 120 extends out of the channel of the sheath 210, and at least two clamping parts 110 move away from each other to be in an open state, and a clamping space 20 for clamping tissue is formed between at least two clamping parts 110.

[0161] As ​ and ​ shown, the clip arms 100 are in a closed state. In some embodiments, the operation part controls the mandrel 220 to move from the distal end to the proximal end. The mandrel 220 drives the extension part 120 and the clamping part 110 to move from the distal end to the proximal end, so that the distal end of the extension part 120 retracts into the channel of the sheath 210, and at least two clamping parts 110 move closer to each other to be in a closed state, and the tissue is clamped between at least two clamping parts 110.

[0162] As ​ and ​ shown, the locking member 400 is released from the sheath 210. In some embodiments, the sheath 210 includes a first pipe fitting 213 and a second pipe fitting 214. The proximal end of the clamping part 110 abuts against the surface of the distal end of the second pipe fitting 214, and pushes the second pipe fitting 214 to move from the distal end to the proximal end relative to the first pipe fitting 213. The limiting piece has a tendency to move towards the proximal end relative to the locking member 400, so that the limiting piece is stressed and deformed, displaced or broken to be released from the limiting surface of the locking member 400. At this time, the locking member 400 is released from the sheath 210.

[0163] As ​ and ​As shown, in some embodiments, after the locking member 400 is released from the sheath tube 210, the clamping portion 110 enters a pre-locked state. In some embodiments, the operating portion controls the mandrel 220 to move from the distal end to the proximal end. The second limiting structure 134 of the locked portion 130 abuts against the contact portion 440 of the locking member 400, and a feedback resistance that prevents the clamping portion 110 from moving from the distal end to the proximal end is generated. After the operator feels the feedback resistance, the operator can confirm again the clamping condition of the clamping portion 110 on the tissue. If the clamping portion 110 does not clamp the tissue properly, the mandrel 220 is pushed from the proximal end to the distal end to change the clamping portion 110 from the closed state to the open state, and the tissue is re-clamped; if the clamping portion 110 clamps the tissue properly, the mandrel 220 is pulled from the distal end to the proximal end, causing the locking spring piece to deform, and the bent portion crosses the contact portion 440 and enters the accommodation cavity 410 to cooperate with the locking recess, and the clamping portion 110 enters the final locked state.

[0164] As ​ shown, the clamping arms 100 are in the locked state. In some embodiments, the operating portion controls the mandrel 220 to continue moving from the distal end to the proximal end. The second limiting structure 134 of the locked portion 130 crosses the contact portion 440 and cooperates with the second stopping structure 430 of the locking member 400, and the first limiting structure 133 of the locked portion 130 cooperates with the first stopping structure 420 of the locking member 400, and at least two clamping portions 110 are locked.

[0165] As ​ shown, the clamping portion 110 and the locking member 400 are released from the sheath tube 210. In some embodiments, the extension portion 120 continues to move from the distal end to the proximal end, and the abutting portion 212 of the sheath tube 210 abuts against the triggering portion 121, causing the triggering portion 121 to trigger the first connection structure 111 or the second connection structure 122 to break, deform, or displace and release from the other, and at this time the extension portion 120 is released from the clamping portion 110. The extension portion 120 is retracted into the sheath tube 210 and withdrawn from the body, and the clamping portion 110 and the locking member 400 remain at the tissue wound to assist in closing the tissue wound.

[0166] Embodiment 3 of this specification provides a control method for the clip instrument 10, and this method is applied to the clip instrument 10 shown in any of the above embodiments.

[0167] ​ is an exemplary flowchart of the control method for the clip instrument 10 shown in some embodiments of this specification.

[0168] As ​ shown, in some embodiments, the control method for the clip instrument 10 includes process 2900. In some embodiments, process 2900 can be executed by the operating portion and includes the following steps:

[0169] Step 2910, control at least two clamping parts 110 of the clamping arm 100 to open.

[0170] In some embodiments, the operating part controls the mandrel 220 to move from the proximal end to the distal end. The mandrel 220 drives the extension part 120 and the clamping parts 110 to move from the proximal end to the distal end, so that the distal end of the extension part 120 extends out of the channel of the sheath tube 210. At least two clamping parts 110 move away from each other to be in an open state, and a clamping space 20 for clamping tissue is formed between at least two clamping parts 110.

[0171] Step 2920, control at least two clamping parts 110 of the clamping arm 100 to close.

[0172] In some embodiments, the operating part controls the mandrel 220 to move from the distal end to the proximal end. The mandrel 220 drives the extension part 120 and the clamping parts 110 to move from the distal end to the proximal end, so that the distal end of the extension part 120 retracts into the channel of the sheath tube 210. At least two clamping parts 110 move closer to each other to be in a closed state, and the tissue is clamped between at least two clamping parts 110.

[0173] Step 2930, control the clamping arm 100 to move from the distal end to the proximal end. At least two clamping parts 110 cooperate with the locking part 400 to lock at least two clamping parts 110. When the clamping arm 100 moves from the distal end to the proximal end, at least two clamping parts 110 actuate the locking part 400 to release from the sheath tube 210.

[0174] In some embodiments, before at least two clamping parts 110 are locked, the control method of the clip instrument further includes: controlling the clamping part 110 to abut against the distal end of the locking part 400, so that the locking part 400 generates a feedback resistance on the clamping part 110, and the clamping part 110 and the locking part 400 are pre-locked. In the pre-locked state, the clamping part 110 of the clamping arm 100 includes a second limiting structure 134. The second limiting structure 134 abuts against the contact part 440 of the locking part 400 and generates a feedback resistance to prevent the clamping part 110 from moving from the distal end to the proximal end. In some embodiments, the second limiting structure 134 includes a locking spring piece. During the process of the clamping arm 100 moving from the distal end to the proximal end, the distal bending part of the locking spring piece abuts against the contact part 440 of the locking part 400 before entering the accommodating cavity 410. Then the contact part 440 generates a feedback resistance on the locking spring piece, and this feedback resistance is fed back to the operator through the mandrel 220, prompting the operator that the clamping part 110 is about to enter the locked state.

[0175] In some embodiments, after the operator feels the feedback resistance, the operator can reconfirm the clamping condition of the tissue by the clamping portion 110. If the clamping portion 110 does not clamp the tissue properly, the mandrel 220 is pushed from the proximal end to the distal end to change the clamping portion 110 from the closed state to the open state, and the tissue is reclamped; if the clamping portion 110 clamps the tissue properly, the mandrel 220 is pulled from the distal end to the proximal end, so that the locking spring piece is deformed under force, and the bending portion crosses the contact portion 440 and enters the accommodation cavity 410 to cooperate with the locking recess, and the clamping portion 110 enters the final locking state. By providing the contact portion 440 and the second stop structure 430 to form the feedback resistance, the operator can be prompted to confirm the tissue clamping condition before locking, and surgical errors can be reduced.

[0176] In some embodiments, the operation portion controls the first limiting structure 133 of at least two clamping portions 110 to cooperate with the first stop structure 420 of the locking member 400 to limit the relative movement between the clamping portion 110 and the locking member 400 in the first direction. In some embodiments, it includes the direction indicated by the arrow D1 in the attached figure, for example, the width direction of the clamping portion 110. ​ In the direction indicated by the arrow D1 in the attached figure, for example, the width direction of the clamping portion 110.

[0177] In some embodiments, the operation portion controls the second limiting structure 134 of at least two clamping portions 110 to cooperate with the second stop structure 430 of the locking member 400 to limit the relative movement between the clamping portion 110 and the locking member 400 in the second direction, wherein the second direction is non-parallel to the first direction. In some embodiments, it includes the direction indicated by the arrow D2 in the attached figure, for example, the length direction of the clamping portion 110. In some embodiments, after the clamping portion 110 and the locking member 400 are pre-locked, the operation portion controls the mandrel 220 to move from the distal end to the proximal end, and the mandrel 220 drives the clamping portion 110 to continue to move from the distal end to the proximal end. The second limiting structure 134 of the clamping portion 110 crosses the contact portion 440 and cooperates with the second stop structure 430 of the locking member 400, and the first limiting structure 133 of the locked portion 130 cooperates with the first stop structure 420 of the locking member 400, and at least two clamping portions 110 are locked. ​ In the direction indicated by the arrow D2 in the attached figure, for example, the length direction of the clamping portion 110. In some embodiments, after the clamping portion 110 and the locking member 400 are pre-locked, the operation portion controls the mandrel 220 to move from the distal end to the proximal end, and the mandrel 220 drives the clamping portion 110 to continue to move from the distal end to the proximal end. The second limiting structure 134 of the clamping portion 110 crosses the contact portion 440 and cooperates with the second stop structure 430 of the locking member 400, and the first limiting structure 133 of the locked portion 130 cooperates with the first stop structure 420 of the locking member 400, and at least two clamping portions 110 are locked.

[0178] In some embodiments, the operation portion controls the actuation portion 135 of the clamping portion 110 to actuate the release of the second resisting structure 211-2 of the sheath 210 and the second mating portion 460 of the locking member 400; wherein, the second resisting structure 211-2 and the second mating portion 460 are releasably connected to limit the movement of the locking member 400 relative to the sheath 210 from the proximal end to the distal end.

[0179] In some embodiments, the sheath 210 or the rotating section 240 of the sheath 210 is an integrally formed structure. In some embodiments, the operating unit controls the clamping portion 110 to move from the distal end to the proximal end, and the actuating portion 135 of the clamping portion 110 moves to the proximal end of the second retaining structure 211-2 of the sheath 210, expanding the proximal end of the second retaining structure 211-2 until it releases the second mating portion 460 of the locking member 400, thereby releasing the locking member 400 from the sheath 210.

[0180] In some embodiments, the sheath tube 210 or the rotating section 240 of the sheath tube 210 includes a first tube 213 and a second tube 214, which are axially movably connected. In some embodiments, the operating unit controls the clamping portion 110 to move from the distal end to the proximal end, and the actuating portion 135 at the proximal end of the clamping portion 110 abuts against the distal end surface of the second tube 214. The actuating portion 135 is controlled to continue to move from the distal end to the proximal end and push the second tube 214 to move from the distal end to the proximal end relative to the first tube 213, causing the second retaining structure 211-2 of the sheath tube 210 to deform, displace, or break under force, thereby releasing it from the second mating portion 460 of the locking member 400. At this time, the locking member 400 is released from the sheath tube 210.

[0181] In some embodiments, the operating part controls the locking of the at least two clamping parts and the locking part before, simultaneously with, or after the locking part and the sheath are released.

[0182] In some embodiments, the second retaining structure 211-2 of the sheath tube 210 is positioned so that, before the at least two clamping portions 110 engage with the locking member 400, the actuating portion 135 actuates the second retaining structure 211-2 to deform, displace, or break, separating it from the locking member 400. In some embodiments, the operating portion first controls the locking member 400 to separate from the sheath tube 210, placing the locking member 400 in a separated state; then, the operating portion controls the at least two clamping portions 110 to lock with the separated locking member 400.

[0183] In some embodiments, the second resisting structure 211-2 is positioned so that, when the at least two clamping portions 110 engage with the locking member 400, the actuating portion 135 causes the second resisting structure 211-2 to deform, displace, or break, separating from the locking member 400. In some embodiments, the operating portion simultaneously controls the locking member 400 to separate from the sheath 210 and lock the at least two clamping portions 110 with the locking member 400.

[0184] In some embodiments, the setting position of the second blocking structure 211-2 is configured such that after at least two clamping portions 110 cooperate with the locking member 400, the actuating portion 135 actuates the second blocking structure 211-2 to deform, displace or break and separate from the locking member 400. In some embodiments, the operating portion controls at least two clamping portions 110 to cooperate with the locking member 400 such that at least two clamping portions 110 are in a locked state. Then, the operating portion controls the locking member 400 to separate from the sheath 210.

[0185] Step 2940, control at least two clamping portions 110 to be released from the sheath 210.

[0186] In some embodiments, the operating portion controls the extension portion and the clamping portion to be released, and then controls the extension portion to retract the sheath, so that the clamping portion and the locking member are released from the sheath together.

[0187] In some embodiments, the operating portion controls the extension portion 120 of the clamping arm 100 to move from the distal end to the proximal end, so that the extension portion 120 or the triggering portion 121 of the clamping portion 110 abuts against the abutting portion 212 of the sheath 210, and the abutting portion 212 can generate a squeezing force on the triggering portion 121.

[0188] In some embodiments, the operating portion controls the extension portion 120 to continue to move from the distal end to the proximal end. The triggering portion 121 is subjected to a force in the first direction such that the first connection structure 111 of the clamping portion 110 is separated from the second connection structure 122 of the extension portion 120, and the extension portion 120 and the clamping portion 110 are released; wherein the first direction is not parallel to the moving direction of the extension portion 120. In some embodiments, the first direction is perpendicular to the moving direction of the extension portion 120 or forms other angles.

[0189] In some embodiments, the operating portion controls the extension portion 120 to withdraw into the sheath 210, so that at least two clamping portions 110 and the locking member 400 are released outside the sheath 210 together, then at least two clamping portions 110 and the locking member 400 are released from the sheath 210. The sheath 210 and the extension portion 120 are withdrawn from the body, and at least two clamping portions 110 and the locking member 400 remain in the body to assist in wound healing.

[0190] The beneficial effects that may be brought about by the embodiments of the present application include but are not limited to:

[0191] (1) The locking member is arranged in the sheath channel, reducing the size of the locking member, and the size after the locking member cooperates with the clamping portion is also smaller; by providing the extension portion and the locking member, compared with the traditional clamping portion, the retention length of the locking member and the clamping portion can be reduced by 30% to 70%, effectively improving the operation field of view of the operation and reducing the operation difficulty; in addition, the locking member is arranged inside the extension portion, solving the problem of limited opening angle of the extension portion, that is, the opening angle of the extension portion is not limited by the locking member, so that the clamping portion obtains a larger clamping space.

[0192] (2) The locked part is arranged on the side of the clamping part facing the clamping space, that is, the locking member locks the locked part inside at least two clamping parts, without occupying the space outside the clamping part, making the structure more compact and small after the clamping part is closed, thereby reducing the surgical field of view blocked by the clamping part.

[0193] (3) The locking member and the sheath tube are matched through a resisting structure. When the clamping part performs the opening or closing operation, there is no contact between the clamping part and the locking member, and the movement of the clamping part or other components (such as the extension part, etc.) will not affect the connection stability of the locking member.

[0194] (4) By setting the rotating section, the clamping arms can rotate around the axis of the sheath tube, and it is possible to more conveniently adjust the closing direction of at least two clamping parts to be consistent with the closing direction of the tissue wound, improving the accuracy of clamping the tissue wound.

[0195] (5) By setting the contact part and the second stop structure to form a feedback resistance, it can prompt the operator to confirm the tissue clamping situation before locking, reducing surgical mistakes.

[0196] (6) By setting the actuating part to actuate the locking member to be released from the sheath tube, it is possible to avoid the disturbance of the locking member by other components or parts during the movement process, reducing the risk of accidental release of the locking member.

[0197] (7) By setting the triggering part, the extension part can be released from the clamping part only when it is triggered by the triggering part, which can avoid the accidental detachment of the extension part and the clamping part due to the pulling force along the movement direction between them, reducing the surgical risk.

[0198] It should be noted that the beneficial effects that may be produced by different embodiments are different. In different embodiments, the beneficial effects that may be produced may be any one or several combinations of the above, or any other beneficial effects that may be obtained.

[0199] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to 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 proposed in this specification, so such modifications, improvements, and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0200] In the meantime, this specification uses specific terms to describe the embodiments of this specification. For example, "an embodiment", "one embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at 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.

[0201] Similarly, it should be noted that, in order to simplify the presentation of this specification and thus help the understanding of one or more embodiments, in the foregoing description of the embodiments of this specification, sometimes multiple features are merged into one embodiment, drawing, or description thereof. However, this method of disclosure does not mean that the features required by the subject matter of this specification are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiment disclosed above.

[0202] 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, by way of example and not limitation, alternative configurations of the embodiments of this specification can be regarded as 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 clip device, characterized in that, Comprising: A sheath tube, the sheath tube comprising a channel; Clamping arms, the clamping arms comprising at least two clamping portions and at least two extending portions, the extending portions being releasably connected to the clamping portions; A locking member, the locking member being releasably disposed in the channel of the sheath tube and located between the at least two extending portions, the locking member being configured to cooperate with the at least two clamping portions to bring the at least two clamping portions into a locked state.

2. The clip device according to claim 1, characterized in that, When the clamping arms are in the locked state, the locking member is located between the at least two clamping portions.

3. The clip device according to claim 1, characterized in that, The extending portion or the clamping portion comprises a triggering portion, the triggering portion being configured to trigger the release of the extending portion and the clamping portion when a force in a first direction and greater than a preset force value is applied; wherein, the first direction is not parallel to the movement direction of the extending portion.

4. The clip device according to claim 3, wherein, A clamping space is formed between the at least two clamping portions, a first connection structure is provided on a side of the clamping portion facing the clamping space, and a distal end of the extending portion comprises a second connection structure, the first connection structure and the second connection structure being releasably connected; The triggering portion is disposed on the first connection structure or the second connection structure, a distal end of the sheath tube comprises an abutting portion, the abutting portion being configured to drive the triggering portion, such that one of the first connection structure and the second connection structure breaks, deforms or displaces to be released from the other.

5. The clip device according to claim 1, characterized in that, The clamping arms comprise an open state and a closed state. In the open state, a distal end portion of the extending portion extends out of the sheath tube, and the at least two clamping portions are away from each other. In the closed state, the extending portions are located within the sheath tube, and the at least two clamping portions are close to each other.

6. The clip device according to claim 1, wherein, The sheath tube comprises a first resisting structure, the locking member comprises a first cooperating portion, the first resisting structure cooperating with the first cooperating portion to limit the movement of the locking member relative to the sheath tube from the distal end towards the proximal end; and / or; The sheath tube comprises a second resisting structure, the locking member comprises a second cooperating portion, the second resisting structure being releasably connected to the second cooperating portion to limit the movement of the locking member relative to the sheath tube from the proximal end towards the distal end.

7. The clip device according to claim 6, wherein, The clamping arms comprise an actuating portion, the actuating portion being configured to be able to actuate the release of the second resisting structure and the second cooperating portion when moving from the distal end towards the proximal end, such that the locking member is released from the sheath tube.

8. The clip device according to claim 7, wherein, The second resisting structure comprises a limiting elastic piece, a distal end of the limiting elastic piece is connected to the inner wall of the sheath tube, and a proximal end protrudes radially inwards from the inner wall of the sheath tube. The locking member comprises a limiting surface facing the distal end, the limiting surface being configured to cooperate with the limiting elastic piece; The actuating portion is disposed on the clamping portion, the actuating portion pushing the limiting elastic piece from the distal end towards the proximal end, causing the limiting elastic piece to deform, displace or break and separate from the limiting surface, and the locking member is released from the sheath tube.

9. The clip device according to claim 7, wherein, The sheath tube includes a first pipe fitting and a second pipe fitting. The first pipe fitting is axially movable in cooperation with the second pipe fitting. The first resistance structure is provided inside the first pipe fitting, and the second resistance structure is provided on the second pipe fitting. The actuating portion is configured to actuate the second pipe fitting to move from the distal end to the proximal end relative to the first pipe fitting, causing the second resistance structure to deform, displace or break and release the second engaging portion.

10. A clip device, characterized in that, Comprising: A sheath tube, the sheath tube including a channel; Clamping arms, the clamping arms including at least two clamping portions, a clamping space being formed between the at least two clamping portions, and a locked portion being provided on a side of the clamping portion facing the clamping space; A locking member, the locking member being releasably provided in the channel of the sheath tube, and the locking member being configured to cooperate with the locked portion to keep the at least two clamping portions in a locked state.

11. The clip device according to claim 10, wherein, When the clamping arms are in the locked state, the locking member is located between the at least two clamping portions.

12. The clip device according to claim 10 or 11, wherein, The locking member includes a receiving cavity for receiving the locked portions of the at least two clamping portions; The locked portion includes a fixing portion and a suspension structure. The suspension structure is arranged at a gap with the clamping portion through the fixing portion, and the suspension structure is located in the receiving cavity when the clamping arms are locked.

13. The clip device according to claim 10, wherein, The locked portion includes a first limiting structure, and the locking member includes a first stopping structure. The first limiting structure cooperates with the first stopping structure to limit the relative movement between the clamping portion and the locking member in a first direction; and, The locked portion includes a second limiting structure, and the locking member includes a second stopping structure. The second limiting structure cooperates with the second stopping structure to limit the relative movement between the clamping portion and the locking member in a second direction, wherein the second direction is not parallel to the first direction.

14. The clip device according to claim 13, wherein The locking member includes a contact portion, and the contact portion is located on the distal side of the second stopping structure. The clamping arms include a pre-locked state and a final locked state; In the pre-locked state, the second limiting structure abuts against the contact portion and generates a feedback resistance that prevents the clamping portion from moving from the distal end to the proximal end; In the final locked state, the second limiting structure passes over the contact portion and cooperates with the second stopping structure, the first limiting structure cooperates with the first stopping structure, and the at least two clamping portions are locked.

15. The clip device according to claim 10, wherein, The sheath tube includes a first resistance structure, and the locking member includes a first engaging portion. The first resistance structure cooperates with the first engaging portion to limit the movement of the locking member relative to the sheath tube from the distal end to the proximal end; and / or; The sheath tube includes a second resistance structure, and the locking member includes a second engaging portion. The second resistance structure is releasably connected to the second engaging portion to limit the movement of the locking member relative to the sheath tube from the proximal end to the distal end.

16. The clip device according to claim 15, wherein, The clamping arms include an actuating portion, and when the actuating portion is configured to move from the distal end to the proximal end, it can actuate the second resistance structure to release the second engaging portion, so that the locking member is released from the sheath tube.

17. The clip device according to claim 16, wherein, The second anti-withdrawal structure includes a limiting elastic piece, the distal end of the limiting elastic piece is connected to the inner wall of the sheath tube, and the proximal end protrudes radially inward from the inner wall of the sheath tube. The locking member includes a limiting surface facing the distal end, and the limiting surface is used to cooperate with the limiting elastic piece; The actuating part is arranged on the locked part. The actuating part pushes the limiting elastic piece from the distal end to the proximal end, causing the limiting elastic piece to deform, displace or break and separate from the limiting surface, and the locking member is released from the sheath tube.

18. The clip device according to claim 16, wherein, The sheath tube includes a first pipe fitting and a second pipe fitting. The first pipe fitting is axially movable in cooperation with the second pipe fitting. The first anti-withdrawal structure is arranged inside the first pipe fitting, and the second anti-withdrawal structure is arranged on the second pipe fitting. The actuating part is configured to actuate the second pipe fitting to move from the distal end to the proximal end relative to the first pipe fitting, causing the second anti-withdrawal structure to deform, displace or break and release from the second cooperation part.

19. A clip device, characterized in that, Comprising: A sheath tube, the sheath tube includes a channel and an anti-withdrawal structure; Clamping arms, the clamping arms include at least two clamping parts; A locking member, the locking member is releasably arranged in the channel of the sheath tube through the anti-withdrawal structure, and the locking member is used to lock the at least two clamping parts; The clamping arms include an operating state and a release state. In the operating state, the locking member cooperates with the anti-withdrawal structure and is located in the channel of the sheath tube. In the release state, the cooperation between the clamping part and the locking member and the anti-withdrawal structure is released and located outside the channel of the sheath tube.

20. The clip instrument according to claim 19, wherein The operating state includes an open state and a closed state. In the open state, the at least two clamping parts are far away from each other and located outside the channel of the sheath tube. In the closed state, the at least two clamping parts are close to each other and in contact with the locking member, and the at least two clamping parts are located outside the channel of the sheath tube.

21. The clip device according to claim 19, wherein, The operating state includes a locked state. In the locked state, the at least two clamping parts cooperate with the locking member, and the locking member is released from the sheath tube.

22. The clip device according to claim 19, wherein, The anti-withdrawal structure includes a first anti-withdrawal structure, and the locking member includes a first cooperation part. The first anti-withdrawal structure cooperates with the first cooperation part to limit the movement of the locking member relative to the sheath tube from the distal end to the proximal end; and / or; The anti-withdrawal structure includes a second anti-withdrawal structure, and the locking member includes a second cooperation part. The second anti-withdrawal structure is releasably connected to the second cooperation part to limit the movement of the locking member relative to the sheath tube from the proximal end to the distal end.

23. The clip device according to claim 22, wherein, The clamping arm includes an actuating part. When the actuating part is configured to move from the distal end to the proximal end, it can actuate the second anti-withdrawal structure to release from the second cooperation part, so that the locking member is released from the sheath tube.

24. The clip device according to claim 23, wherein The second anti-withdrawal structure includes a limiting elastic piece, the distal end of the limiting elastic piece is connected to the inner wall of the sheath tube, and the proximal end protrudes radially inward from the inner wall of the sheath tube. The locking member includes a limiting surface facing the distal end, and the limiting surface is used to cooperate with the limiting elastic piece; The actuating part is arranged on the clamping part. The actuating part pushes the limiting elastic sheet from the distal end to the proximal end, causing the limiting elastic sheet to deform, displace or break and separate from the limiting surface, and the locking part is released from the sheath tube.

25. The clip device according to claim 23, wherein, The sheath tube includes a first pipe fitting and a second pipe fitting. The first pipe fitting is axially movable in cooperation with the second pipe fitting. The first resisting structure is arranged inside the first pipe fitting, and the second resisting structure is arranged on the second pipe fitting. The actuating part is configured to actuate the second pipe fitting to move from the distal end to the proximal end relative to the first pipe fitting, causing the second resisting structure to deform, displace or break and release from the second engaging part.

26. The clip device according to claim 19, wherein, The sheath tube includes a fixed section and a rotating section. The proximal end of the rotating section is rotatably connected to the distal end of the fixed section. The rotating section is configured to rotate around the axis of the sheath tube.

27. A control method for a clip device, characterized in that, The method is applied to the clip instrument according to any one of claims 1-26. The control method includes: Controlling at least two clamping parts of the clip arm to open; Controlling the at least two clamping parts of the clip arm to close; Controlling the clip arm to move from the distal end to the proximal end, and the at least two clamping parts cooperate with the locking part to lock the at least two clamping parts; wherein, when the clip arm moves from the distal end to the proximal end, the at least two clamping parts actuate the locking part to be released from the sheath tube; Controlling the at least two clamping parts to be released from the sheath tube.

28. The control method of the clip device according to claim 27, characterized in that, Before the at least two clamping parts are locked, the method further includes: Controlling the clamping part to abut against the distal end of the locking part, so that the locking part generates a feedback resistance on the clamping part, and the clamping part is pre-locked with the locking part.

29. The control method of the clip instrument according to claim 27, wherein, The at least two clamping parts actuating the locking part to be released from the sheath tube includes: Controlling the actuating part of the clamping part to actuate the second resisting structure of the sheath tube to be released from the second engaging part of the locking part; wherein, the second resisting structure and the second engaging part are releasably connected to limit the movement of the locking part relative to the sheath tube from the proximal end to the distal end.

30. The control method of the clip device according to claim 29, characterized in that, The control method further includes: Before, simultaneously or after controlling the locking part to be released from the sheath tube, controlling the at least two clamping parts to be locked with the locking part; Wherein, the setting position of the second resisting structure is configured such that before, simultaneously or after the at least two clamping parts cooperate with the locking part, the actuating part actuates the second resisting structure to deform, displace or break and separate from the locking part.

31. The control method of the clip instrument according to claim 27, wherein, Controlling the at least two clamping parts to be released from the sheath tube includes: Controlling the extension part of the clip arm to move from the distal end to the proximal end, so that the extension part or the triggering part of the clamping part abuts against the abutting part of the sheath tube; Controlling the extension part to continue to move from the distal end to the proximal end. The triggering part is subjected to a force in the first direction, causing the first connecting structure of the clamping part to separate from the second connecting structure of the extension part, and the extension part is released from the clamping part; wherein, the first direction is not parallel to the movement direction of the extension part; Controlling the extension part to retract into the sheath tube, so that the at least two clamping parts and the locking part are released together outside the sheath tube channel.

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