A clip device

Abstract

The embodiments of the present specification provide a clip device. The clip device comprises a sheath, a clip arm and a receiving tube, the receiving tube is releasably connected with the sheath, the clip arm comprises at least two clamping parts, the proximal ends of the at least two clamping parts are movably arranged in the receiving tube, the clip arm is opened when the clip arm moves distally relative to the receiving tube, the clip arm is closed when the clip arm moves proximally relative to the receiving tube, and the receiving tube is further used for locking the clip arm.

Description

Technical Field

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

[0002] Endoscopic hemostatic clips are medical instruments used for hemostasis during endoscopic surgery. They are commonly used in surgeries involving internal organs such as the gastrointestinal tract and esophagus to control bleeding and maintain a clear surgical field. These clips play a crucial role in endoscopic surgery, helping to reduce surgical complications and improve the safety and effectiveness of the procedure. Endoscopic hemostatic clips need to be operated on in relatively confined spaces, therefore requiring a clip that is easy to use and highly stable. Summary of the Invention

[0003] This specification provides one or more embodiments of a clamping device, comprising: a clamping arm, the proximal end of which is provided with a locking portion; and a receiving tube, the proximal end of which is movably disposed within the receiving tube, the receiving tube including at least one elongated groove extending axially, the elongated groove including a sliding groove and a locking groove, the sliding groove being located at the distal end of the locking groove; when the locking portion and the sliding groove are engaged, the clamping arm switches between an open state and a closed state; when the locking portion and the locking groove are engaged, the clamping arm is in a locked state.

[0004] One or more embodiments of this specification also provide a clamp device, which includes: a clamp arm, the proximal end of which is provided with a sliding portion; a receiving tube, the proximal end of which is movably disposed within the receiving tube, the receiving tube including at least one elongated groove extending axially, the elongated groove including a sliding groove, a first groove and a connecting groove, the sliding groove being located at the distal end of the first groove and the connecting groove being located at the proximal end of the first groove; a sheath, the sheath including a connecting protrusion, the connecting protrusion being releasably connected to the connecting groove; when the sliding portion and the sliding groove are engaged, the clamp device switches between an open state and a closed state; when the sliding portion is located in the first groove, the connecting protrusion is disengaged from the connecting groove, and the receiving tube and the sheath are released.

[0005] One or more embodiments of this specification also provide a clamping device, the clamping device comprising: a sheath tube, the sheath tube including an elastic element disposed within a channel of the sheath tube, the elastic element including a first connecting structure; and a receiving tube, the receiving tube including a second connecting structure, the second connecting structure and the first connecting structure being releasably connected, the receiving tube and the sheath tube being releasably connected; wherein, when the first connecting structure and the second connecting structure are in a limiting engagement, the elastic element is in a stretched state; when the first connecting structure and the second connecting structure are released from the limiting engagement, the elastic element drives the first connecting structure to exit the second connecting structure.

[0006] This specification also provides a control method for a clamping device, the clamping device including a clamping arm, a receiving tube, and a sheath, the sheath containing a mandrel, the clamping arm including at least two clamping portions, the receiving tube being releasably connected to the sheath, and the clamping arm being releasably connected to the mandrel; the control method includes: controlling the clamping arm to move from the proximal end to the distal end, causing at least two clamping portions to open; controlling the clamping arm to move from the distal end to the proximal end, causing at least two clamping portions to close; after the at least two clamping portions are closed, controlling the receiving tube and the sheath to release; after the receiving tube and the sheath are released, controlling the clamping arm to lock; after the clamping arm is locked, controlling the clamping arm to release from the mandrel.

[0007] According to the scheme in the above embodiment, the side wall of the storage tube includes an elongated groove, and the sliding groove and locking groove are all concentrated in the elongated groove, which simplifies the overall structure; the locking part of the clamping arm can directly enter the locking groove from the sliding groove to the proximal end, making the locking operation more convenient; and, based on the locking effect of the storage tube itself on the clamping arm, the locking part is locked by the locking groove, which can restrict the movement of the locking part within a certain range, restrict the movement of the clamping arm to the distal end to prevent the clamping part from opening again, restrict the movement of the clamping arm to the proximal end to prevent the clamping part from excessively entering the storage tube, and restrict the movement of the clamping arm relative to the circumference of the storage tube to prevent the two from rotating relative to each other, thereby improving the reliability of the locking of the clamping arm and the storage tube. Attached Figure Description

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

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

[0010] Figure 1B It is based on Figure 1A A magnified view of region A of the clamping device shown;

[0011] Figure 2A This is an exemplary structural cross-sectional view of a clamping device shown according to some embodiments of this specification;

[0012] Figure 2B This is an exemplary structural diagram of a clamping device shown in some embodiments of this specification from another perspective;

[0013] Figure 3A This is an exemplary structural cross-sectional view of a clamping device shown according to some embodiments of this specification;

[0014] Figure 3B It is based on Figure 3A A magnified view of region B of the clamping device shown;

[0015] Figure 4A This is an exemplary structural diagram of the storage tube shown according to some embodiments of this specification;

[0016] Figure 4B This is an exemplary cross-sectional view taken axially along the receiving tube according to some embodiments of this specification;

[0017] Figure 5A This is an exemplary structural diagram of a clamping arm shown according to some embodiments of this specification, wherein the connecting pin and the clamping part are separated.

[0018] Figure 5B This is an exemplary front view of the clamping arm shown according to some embodiments of this specification;

[0019] Figure 6A These are exemplary structural diagrams of the mandrel shown according to some embodiments of this specification;

[0020] Figure 6B These are exemplary structural diagrams of the mandrel shown according to some embodiments of this specification;

[0021] Figure 7A This is an exemplary structural diagram of the connecting end and clamping arm of a clamping device shown in some embodiments of this specification in an unconnected state;

[0022] Figure 7B This is an exemplary structural diagram of the connecting end and clamping arm of a clamping device shown in some embodiments of this specification in a connected state.

[0023] Figure 8A This is an exemplary structural cross-sectional view of a clamping device shown according to some embodiments of this specification;

[0024] Figure 8B It is based on Figure 8A A magnified view of region C of the clamping device shown;

[0025] Figure 9 These are exemplary structural diagrams of clamping devices shown in some embodiments of this specification;

[0026] Figure 10A This is an exemplary structural cross-sectional view of a clamping device shown according to some embodiments of this specification;

[0027] Figure 10B It is based on Figure 10A A magnified view of region D of the clamping device shown;

[0028] Figure 11AThis is an exemplary structural diagram of a spring end according to some embodiments of this specification;

[0029] Figure 11B This is an exemplary front view of a spring end according to some embodiments of this specification;

[0030] Figure 12 This is an exemplary structural diagram of the limiting member shown in some embodiments of this specification;

[0031] Figure 13A This is an exemplary structural diagram of the receiving tube and sheath in an unassembled state, according to some embodiments of this specification;

[0032] Figure 13B It is based on Figure 13A A partial enlarged view of region E of the receiving tube and sheath shown in some embodiments;

[0033] Figure 13C It is based on Figure 13A Axial sectional view of the receiving tube and sheath in an unassembled state as shown in some embodiments;

[0034] Figure 14A This is an exemplary structural diagram of the receiving tube and sheath in an assembled state, according to some embodiments of this specification;

[0035] Figure 14B It is based on Figure 14A A partial enlarged view of region F of the receiving tube and sheath shown in some embodiments;

[0036] Figure 15 These are exemplary structural diagrams of the clamping arm and the receiving tube shown in some embodiments of this specification;

[0037] Figure 16 These are exemplary structural diagrams of the clamping arm and the receiving tube according to other embodiments of this specification;

[0038] Figure 17A This is an exemplary structural diagram of a clamping device in the open state, according to some embodiments of this specification;

[0039] Figure 17B This is an exemplary axial sectional view of the clamping device in the open state according to some embodiments of this specification;

[0040] Figure 18A This is an exemplary structural diagram of a clamping device in a closed state, according to some embodiments of this specification;

[0041] Figure 18B This is an exemplary axial sectional view of the clamping device in a closed state according to some embodiments of this specification;

[0042] Figure 19A This is an exemplary structural diagram of the receiving tube and sheath in a connected state, according to some embodiments of this specification;

[0043] Figure 19B It is based on Figure 19A A partial enlarged view of region G of the clamping device shown in some embodiments;

[0044] Figure 19C This is an exemplary structural diagram of the receiving tube and sheath in the released state, according to some embodiments of this specification;

[0045] Figure 19D It is based on Figure 19C A partial enlarged view of region H of the clamping device shown in some embodiments;

[0046] Figure 20A This is an exemplary structural diagram of a clamping device in a locked state according to some embodiments of this specification;

[0047] Figure 20B This is an exemplary axial sectional view of a clamping device in a locked state according to some embodiments of this specification;

[0048] Figure 21A This is an exemplary structural diagram of the mandrel and clamping arm in a connected state, according to some embodiments of this specification;

[0049] Figure 21B This is an exemplary axial sectional view of the mandrel and clamp arm in a connected state, according to some embodiments of this specification;

[0050] Figure 21C This is an exemplary structural diagram of the mandrel and clamping arm in the released state, according to some embodiments of this specification;

[0051] Figure 21D This is an exemplary axial cross-sectional view of the mandrel and clamp in the released state, according to some embodiments of this specification;

[0052] Figure 22 This is an exemplary flowchart of a clamping device according to some embodiments of this specification.

[0053] The attached figures are labeled as follows:

[0054] 10. Clamping device; 100. Clamping arm; 110. Locking part; 120. Clamping part; 121. Distal joint; 122. Bending part; 123. Proximal joint; 125. First connecting part; 1251. Pin hole; 126. Second connecting part; 1261. Connecting hole; 127. Mounting groove; 130. Connecting pin; 140. Sliding part; 150. Stop part; 200. Conveying part; 210. Sheath; 211. First connecting structure; 2111. Connecting protrusion; 212. Elastic element; 2121. Spring; 2122. Spring end; 2123. First mating part; 2124. Second 2125. First end face; 212. Second end face; 220. Mandrel; 221. Connecting end; 222. Guide slope; 223. Guide groove; 300. Control unit; 310. Fixed handle; 320. Sliding handle; 400. Storage tube; 410. Long groove; 411. Sliding groove; 412. Locking groove; 413. First groove; 414. Connecting groove; 415. Second groove; 416. Third groove; 420. Second connecting structure; 430. Slot; 440. First limiting part; 450. Second limiting part; 500. Limiting member; 510. Snap-fit ​​part; 520. Operating part. Detailed Implementation

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

[0056] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0057] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0058] Clamping instruments are common surgical instruments used in endoscopy. During surgery, clamping instruments achieve hemostasis by clamping tissue wounds. In traditional clamping instruments, after the clamping part clamps the tissue, the clamping part is locked by a locking element. Then, the clamping part and the locking element are released from the sheath together and remain in the wound position.

[0059] Traditional clamp instruments are often complex in structure, and problems such as insecure locking or difficulty in separation are common, especially during locking and releasing. For example, the locking mechanism of a clamp instrument forms a limiting fit with the clamp arm to achieve locking, but issues such as insecure locking or complex locking structures can lead to the risk of accidental detachment of the clamped tissue. Furthermore, the complex connection structure between the sheath and the storage tube of the clamp instrument can complicate the separation operation or damage the clamp instrument during separation, affecting the clamping effect.

[0060] Therefore, in some embodiments of this specification, it is desirable to provide a clamping device comprising a receiving tube and a clamping arm. The receiving tube includes an elongated groove, and the clamping arm includes a slider. The opening, closing, locking, and releasing operations of the clamping arm are achieved by sliding the slider within the elongated groove. This clamping device has a simple structure and is easy to operate, offering advantages such as secure locking of the receiving tube and clamping arm, and easy release of the receiving tube and sheath.

[0061] Figure 1A This is an exemplary structural diagram of the clamp device 10 shown according to some embodiments of this specification. Figure 1B It is based on Figure 1A A magnified view of region A of the clamping device 10 shown.

[0062] like Figure 1A and Figure 1B As shown, in some embodiments, the clamping device 10 includes a clamping arm 100, a delivery section 200, and a control section 300. The control section 300 is disposed at the proximal end of the delivery section 200, and the clamping arm 100 is disposed at the distal end of the delivery section 200. The terms "proximal end" and "distal end" used in the embodiments of this specification can indicate direction, meaning that along the axial direction of the clamping device 10 (e.g., the extension direction of the sheath 210 of the delivery section 200 within the endoscope channel), the side facing the operator is "proximal end," and the side facing the insertion into the body for treatment is "distal end." "Proximal end" and "distal end" can also refer to portions of structures located in the corresponding directions and should not be construed as referring only to the ends.

[0063] In some applications, the delivery unit 200 has good maneuverability. The delivery unit 200 and its distal clamping arm 100 enter the human body through the endoscope's working channel to approach the tissue to be clamped. Here, tissue refers to the organ tissue of the human body or other organisms. The control unit 300 is located outside the human body or other organisms. The user controls the clamping arm 100 to perform surgical operations by manipulating the control unit 300. For example, the clamping arm 100 can clamp the wound of the tissue to keep the wound closed, thereby assisting wound healing.

[0064] In some embodiments, the delivery unit 200 includes a sheath 210 and a spindle 220 (the spindle 220 is in...) Figure 3A As shown in the figure, the mandrel 220 is disposed within the channel of the sheath 210 and extends axially along the sheath 210. The proximal end of the mandrel 220 is connected to the control part 300, and the distal end of the mandrel 220 is connected to the clamping arm 100. In the embodiments of this specification, "axial" and "radial" can refer to directions. The "radial" direction is perpendicular to the "axial" direction, or the axial direction is the channel extension direction of the sheath 210, and the radial direction is perpendicular to the channel extension direction of the sheath 210.

[0065] In some embodiments, the sheath 210 may be flexible and bendable in any direction. In some embodiments, the control unit 300 consists of a fixed handle 310 and a sliding handle 320. The sliding handle 320 can slide axially relative to the fixed handle 310. The distal end of the sliding handle 320 is fixedly connected to the proximal end of the mandrel 220. The user controls the axial movement of the sliding handle 320 along the fixed handle 310 externally to control the axial movement of the mandrel 220 within the channel of the sheath 210, so that the clamp arm 100 can perform corresponding surgical operations, such as opening, closing, locking, and releasing.

[0066] In some embodiments, the clamping device 10 further includes a receiving tube 400, which is releasably disposed at the distal end of the sheath 210, and the proximal end of the clamping arm 100 is movably engaged within the channel of the receiving tube 400 and releasably connected to the spindle 220.

[0067] This specification provides several embodiments of a clamping device, aiming to solve problems such as the clamping device 10 having an insecure locking mechanism, a complex locking structure, and difficulty in releasing the clamping arm 100 and the sheath 210. Without contradiction, certain features, structures, or characteristics of the various embodiments can be appropriately combined or referenced.

[0068] Figure 2A This is an exemplary structural cross-sectional view of the clamping device 10 shown in some embodiments of this specification. Figure 2B This is an exemplary structural diagram of the clamping device 10 shown in some embodiments of this specification from another perspective.

[0069] like Figure 2A and Figure 2B As shown, Embodiment 1 of this specification provides a clamping device 10, which includes a clamping arm 100 and a receiving tube 400.

[0070] In some embodiments, a locking portion 110 is provided at the proximal end of the clamping arm 100, and the proximal end of the clamping arm 100 is movably disposed within the receiving tube 400. In some embodiments, the clamping arm 100 includes at least two clamping portions 120, which clamp a target object (e.g., a tissue wound) by opening, closing, or other operations, keeping the target object closed. When the clamping arm 100 moves from the proximal end to the distal end relative to the receiving tube 400, causing the distal ends of the at least two clamping portions 120 to move away from each other, the clamping arm 100 is in an open state. When the clamping arm 100 moves from the distal end to the proximal end relative to the receiving tube 400, causing the distal ends of the at least two clamping portions 120 to move closer to each other, the clamping arm 100 is in a closed state.

[0071] In some embodiments, the receiving tube 400 includes at least one elongated groove 410 extending axially. The elongated groove 410 includes a sliding groove 411 and a locking groove 412, with the sliding groove 411 located at the distal end of the locking groove 412. When the locking portion 110 of the clamping arm 100 engages with the sliding groove 411, the clamping arm 100 switches between an open state and a closed state; when the locking portion 110 of the clamping arm 100 engages with the locking groove 412, the clamping arm 100 is in a locked state. The locking groove 412 can restrict the axial and circumferential movement of the locking portion 110 within a certain range. For example, the locking groove 412 can restrict the clamping arm 100 from moving distally, causing the clamping portion 120 to open; the locking groove 412 can restrict the clamping arm 100 from moving proximally, causing the clamping portion 120 to over-enter the receiving tube 400; and the locking groove 412 can restrict the rotation of the clamping arm 100 relative to the receiving tube 400. After the relative movement between the clamping arm 100 and the storage tube 400 in all directions is restricted by the locking groove 412, the clamping arm 100 and the storage tube 400 are locked.

[0072] According to the scheme in the above embodiment, the side wall of the storage tube 400 includes an elongated groove 410, and the sliding groove 411 and locking groove 412 are all concentrated in the elongated groove 410, which simplifies the overall structure; the locking part 110 of the clamping arm 100 can directly enter the locking groove 412 from the sliding groove 411 to the proximal end, making the locking operation more convenient; and, based on the locking effect of the storage tube 400 itself on the clamping arm 100, the locking part 110 is locked by the locking groove 412, which can restrict the movement of the locking part 110 within a certain range, restrict the movement of the clamping arm 100 to the distal end to prevent the clamping part 120 from opening again, restrict the movement of the clamping arm 100 to the proximal end to prevent the clamping part 120 from excessively entering the storage tube 400, and restrict the movement of the clamping arm 100 relative to the circumferential direction of the storage tube 400 to prevent the two from rotating relative to each other, thereby improving the reliability of the locking between the clamping arm 100 and the storage tube 400.

[0073] Figure 3A This is an exemplary structural cross-sectional view of the clamping device 10 shown in some embodiments of this specification. Figure 3B It is based on Figure 3A A magnified view of region B of the clamping device 10 shown. Figure 4A This is an exemplary structural diagram of the storage tube 400 shown according to some embodiments of this specification. Figure 4B This is an exemplary cross-sectional view of the receiving tube 400 taken axially according to some embodiments of this specification.

[0074] like Figures 3A to 4B As shown, in some embodiments, the clamp device 10 further includes a sheath 210, and the receiving tube 400 is releasably connected to the sheath 210. In this specification, "releasable connection" means that the two components remain connected when a preset condition is met (e.g., when the two components form a limiting fit), and release from each other when the preset condition is not met (e.g., when the two components release the limiting fit). In some embodiments, after the receiving tube 400 and the sheath 210 are released, the receiving tube 400 and the clamp arm 100 remain at the target object; for example, the receiving tube 400 and the clamp arm 100 remain at the wound site to achieve hemostasis, while other components such as the sheath 210 and the mandrel 220 are withdrawn from the body.

[0075] In some embodiments, the elongated slot 410 further includes a first slot 413 located between the sliding slot 411 and the locking slot 412. When the locking part 110 of the clamping arm 100 is located in the first slot 413, the receiving tube 400 and the sheath 210 are released. With the first slot 413 located between the sliding slot 411 and the locking slot 412, the locking part 110 passes through the first slot 413 before entering the locking slot 412. Therefore, during the movement of the clamping arm 100 from the distal end to the proximal end, the receiving tube 400 and the sheath 210 are released first, and then the clamping arm 100 locks with the receiving tube 400. This sequence ensures that the clamping arm 100 stops moving after locking, guaranteeing a secure lock. In summary, by providing the elongated slot 410, the release and locking processes of the clamping arm 100 can be achieved through this simple slot, simplifying operation and maintaining a secure lock while making the release of the receiving tube 400 more convenient.

[0076] In some embodiments, the sheath 210 includes a first connecting structure 211, and the receiving tube 400 includes a second connecting structure 420, wherein the first connecting structure 211 and the second connecting structure 420 are releasably connected. In some embodiments, one of the first connecting structure 211 and the second connecting structure 420 includes a connecting protrusion, and the other includes a connecting groove. In other embodiments, the first connecting structure 211 and the second connecting structure 420 may also include other connection forms.

[0077] In some embodiments, when the locking part 110 of the clamping arm 100 is located in the first groove 413, it actuates the second connecting structure 420 to move, thereby disengaging the first connecting structure 211 and the second connecting structure 420. By moving the locking part 110 to the first groove 413, the first connecting structure 211 and the second connecting structure 420 can be quickly disengaged, making the control process of the clamping device 10 more convenient and efficient.

[0078] In some embodiments, the first connecting structure 211 includes a connecting protrusion 2111. In some embodiments, the connecting protrusion 2111 may be provided on the end face of the distal end of the sheath 210, or the connecting protrusion 2111 may be provided on other components within the sheath 210, for example, the connecting protrusion 2111 may be provided on the elastic member 212 within the sheath 210.

[0079] In some embodiments, the elongated groove 410 further includes a connecting groove 414 located near the locking groove 412. The connecting groove 414 forms a second connecting structure 420, and the connecting protrusion 2111 is releasably connected to the connecting groove 414. For example, when the locking part 110 engages with the first groove 413, it can cause the connecting groove 414 to move, such as the connecting groove 414 moving as a whole or the sidewall of the connecting groove 414 moving due to deformation, thereby disengaging the connecting groove 414 and the connecting protrusion 2111.

[0080] In some embodiments, the dimension of the first groove 413 in the first direction is smaller than the dimension of the locking part 110 in the first direction. The first direction refers to the direction shown in the attached figure. Figure 4B The direction indicated by the middle arrow, or the first direction, can be understood as the circumferential direction of the receiving tube 400. When the locking part 110 engages with the first groove 413, the first groove 413 expands in the circumferential direction, causing the receiving tube 400 to undergo elastic deformation in the circumferential direction, which in turn causes the connecting groove 414 to displace, thus disengaging the connecting groove 414 and the connecting protrusion 2111. At this time, by operating the sheath 210 to move proximally or by operating the connecting protrusion 2111 to move proximally, the connecting protrusion 2111 is disengaged from the connecting groove 414, and the receiving tube 400 and the sheath 210 are released.

[0081] In some embodiments, the dimension of the sliding groove 411 in the first direction is greater than or equal to the dimension of the locking part 110 in the first direction; thus, the frictional resistance of the sliding groove 411 to the locking part 110 is smaller, making the opening and closing process of the clamping arm 100 smoother. In some embodiments, the dimension of the locking groove 412 in the first direction is greater than or equal to the dimension of the locking part 110 in the first direction. Thus, after the locking part 110 enters the locking groove 412 from the first groove 413, the receiving tube 400 returns to its original shape. At this time, the proximal end of the first groove 413 can restrict the movement of the locking part 110 to the distal end, and the proximal end of the locking groove 412 can restrict the movement of the locking part 110 to the proximal end.

[0082] During the operation of the clamping arm 100, when the locking part 110 moves to the proximal end of the sliding groove 411, the distal end of the first groove 413 forms a stop on the locking part 110. The locking part 110 then experiences feedback resistance from the distal end of the first groove 413. This feedback resistance is fed back to the control unit 300 to remind the operator that the storage tube 400 and sheath 210 are about to release, or the clamping arm 100 is about to lock. After receiving the feedback resistance, the operator can reconfirm the clamping part 120's clamping of the target object. If the clamping part 120 meets the clamping requirements, the operator increases the driving force controlling the clamping arm 100 to move proximally, causing the locking part 110 to enter the first groove 413 and perform the release operation of the storage tube 400 and sheath 210. If the clamping part 120 does not meet the clamping requirements, the operator controls its movement distally, causing the clamping part 120 to reopen.

[0083] In some embodiments, the elongated slot 410 further includes a second slot 415 extending axially from the proximal end of the connecting slot 414 along the edge of the receiving tube 400. The second slot 415 is used to allow the connecting protrusion 2111 to enter and exit the connecting slot 414.

[0084] In some embodiments, when the locking part 110 engages with the first groove 413, the receiving tube 400 deforms such that the dimension of the second groove 415 in the first direction is greater than or equal to the dimension of the connecting protrusion 2111 in the first direction. The connecting protrusion 2111 disengages from the connecting groove 414, allowing it to freely enter and exit the groove 414. Controlling the connecting protrusion 2111 to move proximally causes it to exit the connecting groove 414, releasing the receiving tube 400 and the sheath 210. By actuating the first groove 413 with the locking part 110, the sidewall of the receiving tube 400 elastically deforms, increasing the dimension of the first groove 413 in the first direction. This disengages the connecting protrusion 2111 from the connecting groove 414, improving the ease of releasing the receiving tube 400 and the sheath 210.

[0085] In some embodiments, when the locking part 110 does not engage with the first groove 413, the size of the second groove 415 in the first direction is smaller than the size of the connecting protrusion 2111 in the first direction, the proximal end of the connecting groove 414 restricts the movement of the connecting protrusion 2111 towards the proximal end, and the receiving tube 400 is connected to the sheath tube 210.

[0086] In some embodiments, the elongated groove 410 further includes a third groove 416 extending from the locking groove 412 to the connecting groove 414. By providing the third groove 416, when the locking part 110 engages with the first groove 413, the deformation of the first groove 413 can cause the deformation of the second groove 415, thereby changing the size of the second groove 415 in a certain direction. In some embodiments, the proximal end of the locking groove 412 needs to limit the locking part 110; therefore, the size of the third groove 416 in the first direction is smaller than the size of the locking part 110 in the first direction, preventing the locking part 110 from entering the third groove 416. For example, the third groove 416 can be an axial slit formed from the side wall of the receiving tube 400 by cutting or other means.

[0087] In some embodiments, the receiving tube 400 further includes at least one slot 430 extending from the middle of the receiving tube 400 to its proximal edge. The slot 430 and the elongated slot 410 are spaced apart along the circumferential direction of the receiving tube 400. The portion of the receiving tube 400 between the slot 430 and the elongated slot 410 forms a cantilever. When the locking part 110 engages with the first slot 413, the cantilever deforms and displaces, causing the dimension of the second slot 415 to change in the first direction, and the connecting protrusion 2111 and the connecting slot 414 to disengage. By providing the slot 430, the sidewall of the receiving tube 400 is more easily deformed, avoiding excessive resistance to the movement of the locking part 110 within the first slot 413.

[0088] In some other embodiments, the second connecting structure 420 includes a connecting recess disposed in the first groove 413, and the first connecting structure 211 includes a connecting arm extending from the distal end of the sheath 210. The distal end of the connecting arm includes a hook that engages with the connecting recess. When the locking part 110 of the clamping arm 100 enters the first groove 413, the hook is displaced by squeezing, causing the hook to disengage from the connecting recess, and the receiving tube 400 and the sheath 210 are released.

[0089] In some embodiments, the sheath 210 includes an elastic element 212 disposed within the channel of the sheath 210. The proximal end of the elastic element 212 is connected to the inner wall of the sheath 210, and the distal end of the elastic element 212 is axially movable at the distal end of the sheath 210. A first connecting structure 211 is disposed at the distal end of the elastic element 212. In some embodiments, the elastic element 212 includes a spring 2121 and a spring end 2122. The spring end 2122 is fixed to the distal end of the spring 2121, and the first connecting structure 211 is disposed on the spring end 2122. The spring end 2122 cooperates with a second connecting structure 420 through the first connecting structure 211. In other embodiments, the elastic element 212 may also be in other forms, such as a rubber ring.

[0090] In some embodiments, when the second connecting structure 420 engages with the first connecting structure 211, the elastic member 212 is in a stretched state. For example, when the elastic member 212 is in a stretched state, it applies a tensile force towards the proximal end to the first connecting structure 211. Since the first connecting structure 211 and the second connecting structure 420 form a limiting engagement, the elastic member 212 remains in a stretched state until the receiving tube 400 and the sheath 210 are released.

[0091] In some embodiments, when the second connecting structure 420 is disengaged from the first connecting structure 211, the elastic element 212 causes the second connecting structure 420 to separate from the first connecting structure 211, releasing the receiving tube 400 and the sheath 210. In some embodiments, when the locking groove 412 engages with the first groove 413, the receiving tube 400 deforms, and the dimension of the second groove 415 in the first direction is greater than or equal to the dimension of the connecting protrusion 2111 in the first direction. Therefore, the connecting protrusion 2111 is no longer constrained by the second groove 415, and the elastic element 212, under its own elastic restoring force, pulls the connecting protrusion 2111 towards its proximal end, causing the connecting protrusion 2111 to disengage from the connecting groove 414. This separates the second connecting structure 420 from the first connecting structure 211, releasing the receiving tube 400 and the sheath 210. By setting the elastic element 212 to drive the first connecting structure 211 to quickly separate from the second connecting structure 420, the efficiency and reliability of releasing the receiving tube 400 and the sheath 210 are improved.

[0092] In some embodiments, the driving force F1 for the locking part 110 to move within the first groove 413 ranges from 30N ≤ F1 < 50N. For example, the driving force F1 includes, but is not limited to, 30N, 35N, 40N, and 45N. When the driving force F1 of the locking part 110 is within the above range, it avoids unstable movement caused by excessive or insufficient driving force, such as jamming or excessively fast movement. This allows the locking part 110 to move within the first groove 413 at a more reasonable speed, ensuring that the locking part 110 only enters the locking groove 412 for locking after the elastic member 212 has pulled the connecting protrusion 2111 away from the connecting groove 414, thus guaranteeing the stability and accuracy of the operation.

[0093] In some embodiments, the range of the driving force F2 for the locking part 110 to move within the sliding groove 411 includes: 0 < F2 < 30N. For example, the driving force F2 includes, but is not limited to, 5N, 10N, 15N, 20N, 25N, etc. Since the driving force F2 is less than the driving force F1, when the locking part 110 engages with the sliding groove 411, only a small driving force is needed to move the locking part 110 to the distal or proximal end. When the locking part 110 needs to engage with the first groove 413, the driving force is increased to the range of 30N ≤ F1 < 50N, allowing the locking part 110 to move from the sliding groove 411 into the first groove 413. This operation is simple and convenient.

[0094] In some embodiments, the receiving tube 400 is rotatably disposed at the distal end of the sheath tube 210 about the axis of the sheath tube 210, so that the closing direction of the clamping part 120 is consistent with the closing direction of the target object. In some embodiments, when the first connecting structure 211 and the second connecting structure 420 are engaged, they can rotate about the axis of the sheath tube 210 (or the axis of the receiving tube 400). In some embodiments, the connecting groove 414 extends along the circumferential direction of the receiving tube 400, so that the connecting protrusion 2111 can move relative to the circumferential direction of the receiving tube 400, thereby allowing the receiving tube 400 to rotate about the axis of the sheath tube 210. In some embodiments, the length of the connecting groove 414 is configured such that the rotation angle α of the receiving tube 400 about the axis of the sheath tube 210 is in the range of 60° to 150°, for example, the length of the connecting groove 414 is configured such that the receiving tube 400 can rotate 90° about the axis of the sheath tube 210.

[0095] Figure 5A This is an exemplary structural diagram of the clamping arm 100 shown according to some embodiments of this specification, wherein the connecting pin 130 and the clamping part 120 are in a decomposed state. Figure 5B This is an exemplary front view of the clamp arm 100 shown according to some embodiments of this specification. Figure 6A This is an exemplary structural diagram of the mandrel 220 shown according to some embodiments of this specification. Figure 6B This is an exemplary structural diagram of the mandrel 220 shown according to some embodiments of this specification.

[0096] like Figures 5A to 6B As shown, in some embodiments, the clamping arm 100 includes at least two clamping portions 120, each clamping portion 120 including a distal engagement portion 121, a bending portion 122, and a proximal engagement portion 123. The distal engagement portion 121 is the portion used to clamp tissue, and it is always located outside the receiving tube 400. The bending portion 122 is elastic; after entering the receiving tube 400, it undergoes elastic deformation due to the spatial constraint of the receiving tube 400, closing the distal engagement portion 121. After extending out of the receiving tube 400, the bending portion 122 bends under its own elastic restoring force, opening the distal engagement portion 121. The proximal engagement portion 123 is always located inside the receiving tube 400 and is used for a releasable connection with the mandrel 220.

[0097] In some embodiments, the proximal joint portion 123 of at least two clamping portions 120 is integrally formed, which improves the stability and symmetry of the at least two clamping portions 120, thereby improving clamping stability.

[0098] In some embodiments, the proximal coupling portion 123 includes a first connecting portion 125, the first connecting portion 125 including a pin hole 1251, and the clamping arm 100 including a connecting pin 130, the connecting pin 130 being connected to the pin hole 1251. The connecting pin 130 can improve the stability and strength of the proximal coupling portion 123. In some embodiments, the two ends of the connecting pin 130 form locking portions 110, and the receiving tube 400 includes two elongated slots 410, the locking portions 110 at both ends of the connecting pin 130 respectively engaging in the two elongated slots 410.

[0099] In some embodiments, the proximal connecting portion 123 includes a second connecting portion 126, the second connecting portion 126 including a connecting hole 1261, and the clamping device 10 including a spindle 220, the distal end of the spindle 220 being provided with a connecting end 221, the connecting end 221 being releasably connected to the connecting hole 1261. In some embodiments, the connecting end 221 includes a guide slope 222 and a limiting groove 223 located proximal to the guide slope 222, the guide slope 222 being used to guide the connecting end 221 into the connecting hole 1261, the connecting hole 1261 cooperating with the limiting groove 223, so that the connecting end 221 is releasably connected to the clamping arm 100.

[0100] In some embodiments, the proximal coupling portion 123 further includes a mounting groove 127 extending from the connecting hole 1261 onto the first connecting portion 125. By providing the mounting groove 127, when the connecting end 221 and the proximal coupling portion 123 are assembled or disassembled, the proximal coupling portion 123 expands elastically to both sides from the mounting groove 127, allowing the connecting end 221 to enter or exit the connecting hole 1261. After assembly or disassembly, the proximal coupling portion 123 returns to its original shape.

[0101] Combination Figure 4A As shown, in some embodiments, the elongated groove 410 includes a first limiting portion 440 disposed at the proximal end of the locking groove 412. In some embodiments, the dimension of the locking groove 412 in a first direction is larger than the dimension of the third groove 416 in the first direction, and a step is formed between the locking groove 412 and the third groove 416, the step being configured as the first limiting portion 440.

[0102] In some embodiments, after the locking portions 110 at both ends of the connecting pin 130 abut and limit the first limiting portion 440, the spindle 220 moves from the far end to the near end, and the spindle 220 drives the connecting end 221 to disengage from the connecting hole 1261, and the clamping arm 100 and the spindle 220 are released.

[0103] In some embodiments, the range of the driving force F3 for the connecting end 221 to disengage from the connecting hole 1261 includes: 60N < F3 < 80N. For example, the driving force F3 includes, but is not limited to, 65N, 70N, 75N, etc. If the driving force F3 is greater than the driving force F1 and F2 of the locking part 110 in the long groove 410, then after the storage tube 400 and the sheath tube 210 are released, and the clamping arm 100 is locked to the storage tube 400, the connecting end 221 and the clamping arm 100 are released, ensuring smooth operation and improving operational efficiency.

[0104] Figure 7A This is an exemplary structural diagram of the clamping device 10 in an unconnected state, showing the connection end 221 and clamping arm 100 according to some embodiments of this specification. Figure 7B This is an exemplary structural diagram of the connecting end 221 and clamping arm 100 of the clamping device 10 in a connected state according to some embodiments of this specification.

[0105] like Figures 5A to 7A As shown, in some embodiments, the connecting end 221 and the clamping arm 100 are in an unconnected state. The clamping arm 100 is in an open state, with the locking part 110 of the clamping arm 100 located at the distal end of the sliding groove 411, and the distal end of the sliding groove 411 limits the locking part 110, preventing the clamping arm 100 from continuing to move distally. The control unit 300 controls the connecting end 221 to move from the proximal end to the distal end, causing the guide slope 222 of the connecting end 221 to extend into the connecting hole 1261 of the clamping arm 100. As the guide slope 222 moves distally, the connecting hole 1261 is gradually opened, allowing the connecting end 221 to gradually enter the connecting hole 1261.

[0106] like Figures 5A to 6B , Figure 7BAs shown, in some embodiments, the connecting end 221 and the clamping arm 100 are in a connected state. The connecting end 221 continues to move from the distal end to the proximal end, and the edge of the connecting hole 1261 of the clamping arm 100 is embedded in the mounting groove 127 of the connecting end 221. At this time, the connecting end 221 and the connecting hole 1261 form a limiting fit, and the spindle 220 and the clamping arm 100 can be released from connection.

[0107] Figure 8A This is an exemplary structural cross-sectional view of the clamping device 10 shown in some embodiments of this specification. Figure 8B It is based on Figure 8A A magnified view of region C of the clamping device 10 shown. Figure 9 This is an exemplary structural diagram of the clamp device 10 shown according to some embodiments of this specification.

[0108] like Figures 8A to 9 As shown, Embodiment 2 of this specification provides a clamp device 10, which includes a clamp arm 100, a storage tube 400, and a sheath tube 210.

[0109] In some embodiments, a sliding portion 140 is provided at the proximal end of the clamping arm 100. The proximal end of the clamping arm 100 is movably disposed within a receiving tube 400. The receiving tube 400 includes at least one elongated groove 410 extending axially. The elongated groove 410 includes a sliding groove 411, a first groove 413, and a connecting groove 414. The sliding groove 411 is located at the distal end of the first groove 413, and the connecting groove 414 is located at the proximal end of the first groove 413. The clamping device 10 of Embodiment 2 differs from the clamping device 10 of Embodiment 1 in that, in Embodiment 2, the elongated groove is not provided with a locking groove. The clamping arm 100 can be locked by the receiving tube 400 itself, or by providing a separate locking element to lock the clamping arm 100.

[0110] In some embodiments, the sliding portion 140 slidably engages with the elongated groove 410, allowing the proximal end of the clamping arm 100 to move relative to the receiving tube 400. When the sliding portion 140 and the sliding groove 411 engage, the clamping device 10 switches between an open state and a closed state. For example, when the sliding portion 140 moves distally within the sliding groove 411, the clamping arm 100 extends out of the receiving tube 400 and is in an open state; when the sliding portion 140 moves proximally within the sliding groove 411, the clamping arm 100 retracts into the receiving tube 400 and is in a closed state.

[0111] In some embodiments, the sheath 210 includes a connecting protrusion 2111, which is releasably connected to the connecting groove 414. When the sliding portion 140 is located in the first groove 413, the connecting protrusion 2111 is disengaged from the connecting groove 414, and the receiving tube 400 and the sheath 210 are released.

[0112] According to the scheme in the above embodiment, the side wall of the storage tube 400 includes an elongated groove 410, and the sliding groove 411, the first groove 413 and the connecting groove 414 are all concentrated in the elongated groove 410, which simplifies the overall structure; and, by the sliding part 140 cooperating with the first groove 413, the connecting groove 414 and the connecting protrusion 2111 are disengaged, making the release process of the storage tube 400 and the sheath tube 210 more convenient.

[0113] The following will combine Figures 8A to 9 This document describes further exemplary embodiments of the clamping device 10 in Embodiment 2. It should be understood that certain features, structures, or characteristics in Embodiment 2 can refer to corresponding features, structures, or characteristics in Embodiment 1. This specification will not repeat some of the same features. It should be noted that some features in Embodiment 2 can be found in... Figures 1A to 7B And its related descriptions.

[0114] In some embodiments, the dimension of the first groove 413 in the first direction is smaller than the dimension of the sliding portion 140 in the first direction. The first direction refers to... Figure 9 The direction indicated by the middle arrow, or the first direction, can be understood as the circumferential direction of the receiving tube 400. When the sliding part 140 engages with the first groove 413, the first groove 413 expands in the circumferential direction, causing the receiving tube 400 to undergo elastic deformation in the circumferential direction, which in turn causes the connecting groove 414 to displace, thus disengaging the connecting groove 414 and the connecting protrusion 2111. At this time, by operating the sheath 210 to move proximally or by operating the connecting protrusion 2111 to move proximally, the connecting protrusion 2111 is disengaged from the connecting groove 414, and the receiving tube 400 and the sheath 210 are released.

[0115] In some embodiments, the dimension of the sliding groove 411 in the first direction is greater than or equal to the dimension of the locking part 110 in the first direction; thus, the frictional resistance of the sliding groove 411 to the sliding part 140 is smaller, making the opening and closing process of the clamping arm 100 smoother.

[0116] In some embodiments, the elongated slot 410 further includes a second slot 415 extending axially from the proximal end of the connecting slot 414 along the edge of the receiving tube 400. The second slot 415 is used to allow the connecting protrusion 2111 to enter and exit the connecting slot 414.

[0117] In some embodiments, when the sliding part 140 engages with the first groove 413, the receiving tube 400 deforms such that the dimension of the second groove 415 in the first direction is greater than or equal to the dimension of the connecting protrusion 2111 in the first direction. The connecting protrusion 2111 disengages from the connecting groove 414, allowing it to freely enter and exit the groove 414. When the connecting protrusion 2111 is moved proximally, it exits the connecting groove 414, releasing the receiving tube 400 and the sheath 210. By actuating the first groove 413 through the locking part 110, the sidewall of the receiving tube 400 undergoes elastic deformation, causing the dimension of the first groove 413 to increase in the first direction. This disengages the connecting protrusion 2111 from the connecting groove 414, improving the ease of releasing the receiving tube 400 and the sheath 210.

[0118] In some embodiments, when the sliding part 140 is not engaged with the first groove 413, the size of the second groove 415 in the first direction is smaller than the size of the connecting protrusion 2111 in the first direction, the proximal end of the connecting groove 414 restricts the movement of the connecting protrusion 2111 towards the proximal end, and the receiving tube 400 is connected to the sheath tube 210.

[0119] In some embodiments, the receiving tube 400 further includes at least one slot 430 extending from the middle of the receiving tube 400 to its proximal edge. The slot 430 and the elongated slot 410 are spaced apart along the circumferential direction of the receiving tube 400. The portion of the receiving tube 400 between the slot 430 and the elongated slot 410 forms a cantilever. When the locking part 110 engages with the first slot 413, the cantilever deforms and displaces, causing the dimension of the second slot 415 to change in the first direction, and the connecting protrusion 2111 and the connecting slot 414 to disengage. By providing the slot 430, the sidewall of the receiving tube 400 is more easily deformed, avoiding excessive resistance to the movement of the locking part 110 within the first slot 413.

[0120] In some embodiments, the receiving tube 400 locks the clamping arm 100. For example, when the bent portion 122 of the clamping arm 100 is received in the receiving tube 400, the receiving tube 400 not only restricts the clamping arm 100 from opening in the circumferential direction, but the axial friction between the receiving tube 400 and the clamping arm 100 also prevents the clamping arm 100 from dislodging from the receiving tube 400, thereby achieving a locking function. In other embodiments, the clamping device 10 further includes a locking member, with a locked portion provided at the proximal end of the clamping arm 100. The locked portion and the locking member form a limiting engagement, locking the clamping arm 100. For example, the locking member is located at the distal end of the sheath 210 or inside the receiving tube 400. The locking member can be a block structure with a locking cavity, a limiting recess formed on the locking member, and a limiting protrusion formed at the locked portion of the clamping arm 100. After the proximal end of the clamping arm 100 enters the locking cavity, the limiting recess and the limiting protrusion engage, thereby achieving locking. For example, the clamping arm 100 includes at least two clamping portions 120, at least one clamping portion 120 has a locking protrusion on its side, and at least another clamping portion 120 has a locking recess on its side, the locking protrusion and the locking recess engaging to lock at least two clamping portions 120.

[0121] In some embodiments, the sheath 210 includes an elastic member 212 disposed within the channel of the sheath 210. The proximal end of the elastic member 212 is connected to the inner wall of the sheath 210, and the distal end of the elastic member 212 is axially movable at the distal end of the sheath 210. A connecting protrusion 2111 is disposed at the distal end of the elastic member 212. In some embodiments, the elastic member 212 includes a spring 2121 and a spring end 2122. The spring end 2122 is fixed to the distal end of the spring 2121, and the connecting protrusion 2111 is disposed on the spring end 2122. The spring end 2122 engages with the connecting groove 414 through the connecting protrusion 2111. In other embodiments, the elastic member 212 may also be in other forms, such as a rubber ring. More embodiments of the elastic member 212 can be found in [reference needed]. Figures 10A to 11B And its related descriptions.

[0122] In some embodiments, when the connecting protrusion 2111 engages with the connecting groove 414, the elastic member 212 is in a stretched state. For example, when the elastic member 212 is in a stretched state, it applies a pulling force towards the proximal end to the connecting protrusion 2111. Because the connecting protrusion 2111 and the connecting groove 414 form a limiting engagement, the elastic member 212 remains in a stretched state until the receiving tube 400 and the sheath 210 are released.

[0123] In some embodiments, when the connecting protrusion 2111 disengages from the connecting groove 414, the elastic element 212 causes the connecting protrusion 2111 to separate from the connecting groove 414, releasing the receiving tube 400 and the sheath 210. In some embodiments, when the locking groove 412 engages with the first groove 413, the receiving tube 400 deforms, and the dimension of the second groove 415 in the first direction is greater than or equal to the dimension of the connecting protrusion 2111 in the first direction. Therefore, the connecting protrusion 2111 is no longer constrained by the second groove 415, and the elastic element 212, under its own elastic restoring force, pulls the connecting protrusion 2111 towards its proximal end, causing the connecting protrusion 2111 to disengage from the connecting groove 414, releasing the receiving tube 400 and the sheath 210. By setting the elastic element 212 to drive the connecting protrusion 2111 to quickly separate from the connecting groove 414, the efficiency and reliability of releasing the receiving tube 400 and the sheath 210 are improved. More exemplary embodiments regarding the connection and release of the receiving tube 400 and the sheath 210 can be found in [reference needed]. Figures 3A to 4B And its related descriptions.

[0124] In some embodiments, the clamping arm 100 includes at least two clamping portions 120, each clamping portion 120 including a distal engagement portion 121, a bent portion 122, and a proximal engagement portion 123. The proximal engagement portions 123 of the at least two clamping portions 120 are integrally formed, which improves the stability and symmetry of the at least two clamping portions 120, thereby improving clamping stability. More exemplary embodiments of the clamping arm 100 can be found in [reference needed]. Figures 5A to 6B And its related descriptions.

[0125] In some embodiments, the proximal joint 123 includes a first connecting portion 125, the first connecting portion 125 including a pin hole 1251, and the clamping arm 100 including a connecting pin 130, the connecting pin 130 being connected to the pin hole 1251. The connecting pin 130 can improve the stability and strength of the proximal joint 123. In some embodiments, the two ends of the connecting pin 130 form sliding portions 140, and the receiving tube 400 includes two elongated grooves 410, the sliding portions 140 at both ends of the connecting pin 130 respectively engaging in the two elongated grooves 410.

[0126] In some embodiments, the proximal connecting portion 123 includes a second connecting portion 126, the second connecting portion 126 including a connecting hole 1261, and the clamping device 10 including a spindle 220, the distal end of the spindle 220 being provided with a connecting end 221, the connecting end 221 being releasably connected to the connecting hole 1261. In some embodiments, the connecting end 221 includes a guide slope 222 and a limiting groove 223 located proximal to the guide slope 222, the guide slope 222 being used to guide the connecting end 221 into the connecting hole 1261, the connecting hole 1261 cooperating with the limiting groove 223, so that the connecting end 221 is releasably connected to the clamping arm 100.

[0127] In some embodiments, the proximal coupling portion 123 further includes a mounting groove 127 extending from the connecting hole 1261 onto the first connecting portion 125. By providing the mounting groove 127, when the connecting end 221 and the proximal coupling portion 123 are assembled or disassembled, the proximal coupling portion 123 expands elastically to both sides from the mounting groove 127, allowing the connecting end 221 to enter or exit the connecting hole 1261. After assembly or disassembly, the proximal coupling portion 123 returns to its original shape.

[0128] Combination Figures 4A to 5B As shown, in some embodiments, the receiving tube 400 includes a second limiting portion 450 disposed at the distal end of the receiving tube 400; the clamping arm 100 includes a stop portion 150 disposed between the distal connecting portion 121 and the curved portion 122. In some embodiments, the second limiting portion 450 includes a baffle plate disposed at the distal end of the receiving tube 400. In some embodiments, the width of the distal connecting portion 121 of the clamping arm 100 is greater than the width of the curved portion 122, and a step is formed at the connection between the distal connecting portion 121 and the curved portion 122, which constitutes the stop portion 150.

[0129] In some embodiments, after the stop portion 150 abuts against and is limited by the second limiting portion 450, the spindle 220 moves from the distal end to the proximal end. The spindle 220 causes the connecting end 221 to disengage from the connecting hole 1261, and the clamping arm 100 and the spindle 220 are released. For example, when the clamping arm 100 moves from the distal end to the proximal end, the step abuts against the baffle, and the baffle restricts the clamping arm 100 from continuing to move proximal, while the spindle 220 continues to move from the distal end to the proximal end, causing the connecting end 221 to disengage from the connecting hole 1261, and the clamping arm 100 and the spindle 220 are released.

[0130] Figure 10A This is an exemplary structural cross-sectional view of the clamping device 10 shown in some embodiments of this specification. Figure 10B It is based on Figure 10A A magnified view of region D of the clamping device 10 shown.

[0131] Embodiment 3 of this specification provides a clamp device 10, which includes a receiving tube 400 and a sheath tube 210.

[0132] In some embodiments, the sheath 210 includes an elastic element 212 disposed within a channel of the sheath 210, and the elastic element 212 includes a first connecting structure 211. In some embodiments, the elastic element 212 is configured to provide an elastic force along the axial direction of the sheath 210. For example, the proximal end of the elastic element 212 is fixed to the inner wall of the sheath 210, and the distal end is provided with the first connecting structure 211. The elastic element 212 generates an elastic force along the axial direction of the sheath 210 through deformation, and this elastic force can drive the first connecting structure 211 to move axially relative to the sheath 210.

[0133] In some embodiments, the receiving tube 400 includes a second connecting structure 420, which is releasably connected to the first connecting structure 211, and the receiving tube 400 and the sheath 210 are releasably connected. When the first connecting structure 211 and the second connecting structure 420 are engaged, the elastic element 212 is in a stretched state, applying a tensile force towards the proximal end of the first connecting structure 211. Under the limiting action of the second connecting structure 420 on the first connecting structure 211, the elastic element 212 remains in the stretched state. When the first connecting structure 211 and the second connecting structure 420 are released, the elastic element 212 drives the first connecting structure 211 out of the second connecting structure 420, releasing the receiving tube 400 from the sheath 210. By providing the elastic element 212 to drive the first connecting structure 211 to quickly separate from the second connecting structure 420, the efficiency and reliability of the release of the receiving tube 400 and the sheath 210 are improved.

[0134] The following will combine Figures 10A to 16 This document describes further exemplary embodiments of the clamping device 10 in Embodiment 3. It should be understood that certain features, structures, or characteristics in Embodiment 3 can refer to corresponding features, structures, or characteristics in Embodiment 1 or Embodiment 2. This specification will not repeat some of the same features. It should be noted that some features in Embodiment 3 can be found in... Figures 1A to 9 And its related descriptions.

[0135] Figure 11A This is an exemplary structural diagram of the spring end 2122 shown according to some embodiments of this specification. Figure 11B This is an exemplary front view of the spring end 2122 shown according to some embodiments of this specification.

[0136] like Figures 10A to 11B As shown, in some embodiments, the elastic element 212 includes a spring 2121 and a spring end 2122. The proximal end of the spring 2121 is fixed to the inner wall of the sheath 210, and the distal end is fixed to the spring end 2122. The spring end 2122 is movably disposed at the distal end of the sheath 210. At least a portion of the spring end 2122 extends out of the distal end of the sheath 210 for cooperating with the second connecting structure 420.

[0137] In some embodiments, the spring end 2122 includes a first mating portion 2123 and a second mating portion 2124. The first mating portion 2123 mates with the receiving tube 400, and the second mating portion 2124 mates with the sheath 210. A first connecting structure 211 is disposed on the first mating portion 2123. In some embodiments, the first mating portion 2123 extends from the distal end of the sheath 210 and mates with the inner wall of the receiving tube 400. The first connecting structure 211 protrudes radially outward from the side wall of the first mating portion 2123 and mates with the second connecting structure 420 of the receiving tube 400.

[0138] In some embodiments, the outer diameter of the first mating portion 2123 is larger than the inner diameter of the sheath 210. For example, a step is formed between the first mating portion 2123 and the second mating portion 2124. When the spring 2121 drives the spring end 2122 to move from the distal end to the proximal end, the step at the proximal end of the first mating portion 2123 abuts against the end face at the distal end of the sheath 210, preventing the first mating portion 2123 from entering the channel of the sheath 210. In this way, at least a portion of the spring end 2122 is always kept outside the channel of the sheath 210, facilitating reuse.

[0139] Figure 12 This is an exemplary structural diagram of the limiting member 500 shown in some embodiments of this specification. Figures 13A to 14B This is an exemplary structural diagram of the assembly of the receiving tube 400 and the sheath tube 210 according to some embodiments of this specification.

[0140] like Figures 12 to 14B As shown, in some embodiments, the clamping device 10 further includes a limiting member 500. The proximal end of the first mating portion 2123 includes a first end face 2125, and the distal end of the sheath 210 includes a second end face 212. The limiting member 500 is detachably abutted between the first end face 2125 and the second end face 212, forming an assembly gap between the first connecting structure 211 and the second end face 212. The assembly gap is used to assemble the second connecting structure 420. In some embodiments, the limiting member 500 includes a snap-fit ​​portion 510 and an operating portion 520. The snap-fit ​​portion 510 is used to assemble between the first end face 2125 and the second end face 212, and the operating portion 520 protrudes from the assembly gap for gripping by tools or a person, facilitating assembly and disassembly.

[0141] In some embodiments, the sidewall of the storage tube 400 includes a slot 430, and the position of the limiting member 500 along the axial direction of the sheath tube 210 corresponds to the position of the slot 430. The slot 430 is used to avoid the limiting member 500 so that the storage tube 400 and the sheath tube 210 can be smoothly assembled.

[0142] In some embodiments, when the receiving tube 400 and the sheath tube 210 are not connected, the limiting member 500 is assembled between the first end face 2125 and the second end face 212, so that an assembly gap is formed between the first connecting structure 211 and the second end face 212.

[0143] In some embodiments, when the sheath 210 moves from proximal to distal end, the limiting member 500 moves into the slot 430. In some embodiments, the receiving tube 400 includes a second slot 415 for the first connecting structure 211 to pass through and enter the second connecting structure 420. When the sheath 210 moves from proximal to distal end, the first mating part 2123 moves into the receiving tube 400, the first connecting structure 211 presses against the entrance of the second slot 415 and passes through the second slot 415, and when the sheath 210 continues to move from proximal to distal end, the first connecting structure 211 enters the second connecting structure 420. In some embodiments, when the sheath 210 continues to move from proximal to distal end until the first connecting structure 211 engages with the second connecting structure 420, the receiving tube 400 and the sheath 210 switch to a connected state.

[0144] In some embodiments, after the receiving tube 400 is connected to the sheath tube 210, the limiting member 500 separates from the first end face 2125 and the second end face 212. In some embodiments, the operating portion 520 of the limiting member 500 is subjected to force, causing the locking portion 510 to retract from the assembly gap.

[0145] By setting the limiting component 500, an assembly gap is formed between the first connecting structure 211 and the second end face 212, avoiding the situation where the first connecting structure 211 is stuck to the second end face 212 and cannot be assembled, making the assembly of the storage tube 400 and the sheath tube 210 simpler.

[0146] In some embodiments, the first connecting structure 211 includes a connecting protrusion 2111, and the second connecting structure 420 includes a connecting groove 414, wherein the connecting protrusion 2111 and the connecting groove 414 are releasably connected. In some embodiments, the connecting protrusion 2111 is disposed on the spring end 2122, and the connecting protrusion 2111 protrudes radially from the first mating portion 2123. In some embodiments, the connecting groove 414 is disposed near the end of the receiving tube 400, and the receiving tube 400 includes a second groove 415, which extends axially from the connecting groove 414 along the edge of the receiving tube 400, and the connecting protrusion 2111 enters and exits the connecting groove 414 from the second groove 415. In some embodiments, the receiving tube 400 may not have the second groove 415, and the connecting protrusion 2111 may elastically deform and enter the connecting groove 414 by compression.

[0147] Figure 15 This is an exemplary structural diagram of the clamping arm 100 and the receiving tube 400 shown in some embodiments of this specification.

[0148] In some embodiments, the clamping device 10 further includes a clamping arm 100, the proximal end of which is provided with a sliding portion 140; the receiving tube 400 includes an elongated groove 410, the elongated groove 410 including a first groove 413 and a connecting groove 414, the first groove 413 being located at the distal end of the connecting groove 414; when the sliding portion 140 engages with the first groove 413, it actuates the connecting groove 414 to disengage from the connecting protrusion 2111. In some embodiments, when the sliding portion 140 slides along the inner wall of the receiving tube 400, the clamping portion 120 switches between an open state and a closed state; when the sliding portion 140 slides to the first groove 413, it actuates the connecting groove 414 to deform, causing the connecting groove 414 to disengage from the connecting protrusion 2111. In some embodiments, the distal end of the first groove 413 is provided with an inlet that allows the sliding portion 140 to enter the first groove 413, the inlet being larger than the cross-sectional dimension of the sliding portion 140, so that when the sliding portion 140 slides to the inlet, it can enter the distal end of the first groove 413.

[0149] In some embodiments, the elongated groove 410 further includes a second groove 415, which extends axially from the proximal end of the connecting groove 414 along the receiving tube 400 to the proximal edge of the receiving tube 400; the dimension of the first groove 413 in the first direction is smaller than the dimension of the sliding portion 140 in the first direction; when the sliding portion 140 is located in the first groove 413, the receiving tube 400 deforms such that the dimension of the second groove 415 in the first direction is greater than or equal to the dimension of the connecting protrusion 2111 in the first direction, and the connecting protrusion 2111 disengages from the connecting groove 414; when the sliding portion 140 is not located in the first groove 413, the dimension of the second groove 415 in the first direction is smaller than the dimension of the connecting protrusion 2111 in the first direction, and the proximal end of the connecting groove 414 is used to restrict the movement of the connecting protrusion 2111 towards the proximal end. Wherein, the first direction refers to the direction shown in the attached figure. Figure 15 The direction indicated by the middle arrow, or the first direction, can be understood as the circumferential direction of the storage tube 400.

[0150] Figure 16 This is an exemplary structural diagram of the clamp arm 100 and the receiving tube 400 according to other embodiments of this specification.

[0151] In some embodiments, the sliding part 140 constitutes the locking part 110 of the clamping arm 100; the elongated groove 410 further includes a sliding groove 411 and a locking groove 412, the sliding groove 411 being located at the distal end of the locking groove 412, and the locking groove 412 being located at the distal end of the connecting groove 414; when the locking part 110 and the sliding groove 411 are engaged, the clamping device 10 switches between an open state and a closed state; when the locking part 110 and the locking groove 412 are engaged, the clamping device 10 is in a locked state. The release and locking process of the clamping arm 100 can be achieved through the simple elongated groove 410, which is simple to operate, maintains the locking reliability, and makes the release of the storage tube 400 more convenient.

[0152] In some embodiments, the first groove 413 is located between the sliding groove 411 and the locking groove 412; when the clamping arm 100 moves from the distal end to the proximal end, the receiving tube 400 and the sheath 210 are released first, and then the clamping arm 100 is locked to the receiving tube 400. The sliding part 140 of the clamping arm 100 first actuates the receiving tube 400 and the sheath 210 to release, and then the sliding part 140 cooperates with the locking groove 412 to achieve locking. Then, after locking, the clamping arm 100 is stationary relative to the receiving tube 400, and the clamping arm 100 does not need to continue to move, thereby improving the reliability and stability of locking.

[0153] In some embodiments, the receiving tube 400 is rotatably disposed at the distal end of the sheath 210 about the axis of the sheath 210, so that the closing direction of the clamping part 120 is consistent with the wound closing direction. Further embodiments regarding the release of the receiving tube 400 and the sheath 210 can be found in [reference needed]. Figures 3A to 4B And its related descriptions.

[0154] In some embodiments, the clamping arm 100 includes at least two clamping portions 120, each clamping portion 120 including a distal engagement portion 121, a bending portion 122 and a proximal engagement portion 123, wherein the proximal engagement portion 123 of the at least two clamping portions 120 is integrally formed.

[0155] In some embodiments, the proximal coupling portion 123 includes a first connecting portion 125, which includes a pin hole 1251. The clamping arm 100 includes a connecting pin 130, which is connected to the pin hole 1251. The two ends of the connecting pin 130 form a sliding portion 140. The proximal coupling portion 123 includes a second connecting portion 126, which includes a connecting hole 1261. The clamping device 10 includes a spindle 220, and the distal end of the spindle 220 is provided with a connecting end 221, which is releasably connected to the connecting hole 1261.

[0156] In some embodiments, the proximal connection portion 123 further includes a mounting groove 127 extending from the connection hole 1261 onto the first connection portion 125.

[0157] In some embodiments, the receiving tube 400 includes a limiting portion, and the clamping arm 100 includes an abutting portion. After the limiting portion abuts against the abutting portion, the spindle 220 moves from the distal end to the proximal end, and the connecting end 221 disengages from the connecting hole 1261. Further embodiments regarding the release of the receiving tube 400 and the sheath 210 can be found in [reference needed]. Figures 5A to 6B And its related descriptions.

[0158] Figures 17A to 21D This is an exemplary structural diagram of the control process of the clamping device 10 according to some embodiments of this specification.

[0159] like Figures 17A to 17BAs shown, the clamping arm 100 is in the open state. In some embodiments, the control unit 300 controls the spindle 220 to move from the proximal end to the distal end, causing the clamping arm 100 to move from the proximal end to the distal end. At this time, the locking part 110 of the clamping arm 100 moves from the proximal end to the distal end along the sliding groove 411. When the bent part 122 of the clamping part 120 extends out of the receiving tube 400, the distal connecting part 121 of the clamping arm 100 opens under the action of the bent part 122. The clamping parts 120 are configured to form a clamping space. The control unit 300 controls the sheath 210 to move and adjust the position of the clamping space so that the clamping space is aligned with the tissue. The control unit 300 also controls the spindle 220 to rotate, causing the clamping arm 100 and the receiving tube 400 to rotate relative to the sheath 210, adjusting the closing direction of at least two clamping parts 120 to be consistent with the closing direction of the target object.

[0160] like Figures 18A to 18B As shown, the clamping arm 100 is in a closed state. In some embodiments, the control unit 300 controls the mandrel 220 to move from the distal end to the proximal end, causing the clamping arm 100 to move from the distal end to the proximal end. At this time, the locking part 110 of the clamping arm 100 moves from the distal end to the proximal end along the sliding groove 411. When the bent part 122 of the clamping part 120 retracts into the receiving tube 400, the distal end connecting part 121 of the clamping arm 100 closes under the limiting action of the receiving tube 400, clamping the tissue between at least two clamping parts 120, thereby closing the tissue.

[0161] like Figures 19A to 19D As shown, the storage tube 400 and sheath 210 are released. In some embodiments, the control unit 300 controls the spindle 220 to move from the distal end to the proximal end, driving the clamping arm 100 to move from the distal end to the proximal end. At this time, the locking part 110 of the clamping arm 100 enters the first groove 413 from the sliding groove 411. After the locking part 110 enters the first groove 413, it actuates the sidewall of the storage tube 400 to undergo elastic deformation, and makes the size of the second groove 415 in the first direction larger than the size of the connecting protrusion 2111 in the first direction. At this time, the connecting groove 414 and the connecting protrusion 2111 are disengaged. Under the action of the elastic restoring force, the elastic member 212 drives the spring end 2122 to move from the distal end to the proximal end, causing the connecting protrusion 2111 to exit the connecting groove 414, and the storage tube 400 and sheath 210 are released.

[0162] like Figures 20A to 20B As shown, the clamping arm 100 is locked to the storage tube 400. In some embodiments, the control unit 300 controls the spindle 220 to move from the distal end to the proximal end, causing the clamping arm 100 to move from the distal end to the proximal end. At this time, the locking part 110 of the clamping arm 100 enters the locking groove 412 from the first groove 413, and the storage tube 400 returns to its original shape. When the locking part 110 engages with the locking groove 412, it can restrict the axial and circumferential movement of the clamping arm 100 relative to the storage tube 400, thereby locking the clamping arm 100 and the storage tube 400.

[0163] like Figures 21A to 21D As shown, the spindle 220 is released from the clamping arm 100. In some embodiments, the control unit 300 controls the spindle 220 to move from the distal end to the proximal end. At this time, the locking part 110 of the clamping arm 100 is confined within the locking groove 412, and the proximal end of the locking groove 412 restricts the clamping arm 100 from moving proximally. And / or, after the limiting part abuts against the abutting part, the limiting part restricts the clamping arm 100 from moving proximally. When the driving force applied by the spindle 220 to the clamping arm 100 increases to a certain level, the connecting end 221 of the spindle 220 disengages from the connecting hole 1261 of the clamping arm 100, and the spindle 220 is released from the clamping arm 100.

[0164] Embodiment 4 of this specification also provides a control method for a clamping device 10, which is applied to the clamping device 10 in any of the above embodiments.

[0165] Figure 22 This is an exemplary flowchart of a clamping device 10 according to some embodiments of this specification. Figure 22 As shown, process 2200 includes the following steps. In some embodiments, process 2200 may be executed by control unit 300. In some embodiments, clamp device 10 includes clamp arm 100, storage tube 400 and sheath tube 210, the sheath tube 210 is provided with a spindle 220, the clamp arm 100 includes at least two clamping parts 120, the storage tube 400 is releasably connected to the sheath tube 210, and the clamp arm 100 is releasably connected to the spindle 220.

[0166] In step 2210, the control unit 300 controls the clamping arm 100 to move from the proximal end to the distal end, so that at least two clamping parts 120 open.

[0167] In some embodiments, the control unit 300 includes a sliding handle 320. When the sliding handle 320 moves from the proximal end to the distal end, it drives the spindle 220 to move from the proximal end to the distal end, thereby controlling the clamping arm 100 to move from the proximal end to the distal end, causing at least two clamping portions 120 to open. In some embodiments, the receiving tube 400 includes an elongated groove 410, which includes a sliding groove 411, and the clamping arm 100 includes a locking portion 110. The control unit 300 controls the locking portion 110 to move from the proximal end to the distal end within the sliding groove 411 via the spindle 220. When the bent portion 122 of the clamping portion 120 extends out of the receiving tube 400, the distal connecting portions 121 move away from each other under the action of the bent portion 122, causing at least two clamping portions 120 to open.

[0168] In step 2220, the control unit 300 controls the clamping arm 100 to move from the distal end to the proximal end, so that at least two clamping parts 120 close.

[0169] In some embodiments, the control unit 300 drives the spindle 220 to move from the distal end to the proximal end, thereby controlling the clamping arm 100 to move from the distal end to the proximal end, so that at least two clamping portions 120 close. In some embodiments, the control unit 300 controls the locking portion 110 to move from the distal end to the proximal end in the sliding groove 411 via the spindle 220. When the bent portion 122 of the clamping portion 120 retracts into the receiving tube 400, the bent portion 122, under the limiting action of the receiving tube 400, drives the distal connecting portion 121 to move closer to each other, so that at least two clamping portions 120 close.

[0170] In step 2230, after at least two clamping parts 120 are closed, the control unit 300 controls the release of the receiving tube 400 and the sheath tube 210.

[0171] In some embodiments, the elongated groove 410 includes a connecting groove 414 and a first groove 413, the sheath tube 210 includes an elastic element 212, the elastic element 212 includes a connecting protrusion 2111, and the connecting groove 414 and the connecting protrusion 2111 are releasably connected.

[0172] In some embodiments, the control unit 300 drives the spindle 220 to move from the distal end to the proximal end, thereby controlling the clamping arm 100 to move from the distal end to the proximal end. The locking part 110 of the clamping arm 100 engages with the first groove 413, releasing the connecting groove 414 and the connecting protrusion 2111. In some embodiments, the control unit 300 controls the locking part 110 to engage with the first groove 413, causing the connecting groove 414 to displace. This displacement may be caused by the elastic deformation of the receiving tube 400. After the connecting groove 414 displaces, the connecting protrusion 2111 is released from its limiting position in the connecting groove 414.

[0173] In some embodiments, after the connecting protrusion 2111 is released from the connecting groove 414, the connecting protrusion 2111 is controlled to exit the connecting groove 414, and the receiving tube 400 and the sheath 210 are released. In some embodiments, the sheath 210 further includes an elastic element 212. When the connecting protrusion 2111 is engaged with the connecting groove 414, the elastic element 212 is in a stretched state; when the connecting protrusion 2111 is disengaged from the connecting groove 414, the elastic element 212, under the action of elastic restoring force, drives the spring end 2122 to move from the distal end to the proximal end, causing the connecting protrusion 2111 to exit the connecting groove 414, and the receiving tube 400 and the sheath 210 to be released.

[0174] In step 2240, after the storage tube 400 and the sheath tube 210 are released, the control unit 300 controls the clamping arm 100 to lock.

[0175] In some embodiments, the elongated slot 410 of the receiving tube 400 includes a locking slot 412 located at the proximal end of the actuation structure. In some embodiments, the control unit 300 drives the spindle 220 to move from the distal end to the proximal end, thereby controlling the clamping arm 100 to move from the distal end to the proximal end. The clamping arm 100 controls the locking part 110 to move from the distal end to the proximal end, so that the locking part 110 engages with the locking slot 412, and at least two clamping parts 120 are locked.

[0176] When the locking part 110 engages with the locking groove 412, it can restrict the axial and circumferential movement of the clamping arm 100 relative to the receiving tube 400, thereby improving the reliability of the lock. The sliding part 140 of the clamping arm 100 first actuates the receiving tube 400 and the sheath 210 to release, and then the sliding part 140 engages with the locking groove 412 to lock. After locking, the clamping arm 100 is stationary relative to the receiving tube 400, and the clamping arm 100 does not need to move anymore, thereby improving the reliability and stability of the lock.

[0177] Step 2250: After the clamping arm 100 is locked, the control unit 300 controls the clamping arm 100 to release from the spindle 220.

[0178] In some embodiments, the storage tube 400 includes a limiting portion located at the proximal end of the locking groove 412, and the clamping arm 100 includes a stop portion 150, with the locking portion 110 of the clamping arm 100 configured as the stop portion 150. In some embodiments, the storage tube 400 includes a limiting portion located at the distal end of the storage tube 400, and the clamping arm 100 includes a stop portion 150, with a step formed between the distal end connecting portion 121 and the bending portion 122 of the clamping arm 100, the step being configured as the stop portion 150.

[0179] In some embodiments, the control unit 300 drives the spindle 220 to move from the distal end to the proximal end, thereby controlling the clamping arm 100 to move from the distal end to the proximal end, and further controlling the stop portion 150 to move from the distal end to the proximal end and abut against the limiting portion. The limiting portion is used to prevent the locking portion 110 from continuing to move proximal. In some embodiments, the control unit 300 controls the spindle 220 to move from the distal end to the proximal end. When the driving force applied by the spindle 220 to the clamping arm 100 increases to a certain level, the connecting end 221 of the spindle 220 is released from at least two clamping portions 120.

[0180] It should be noted that the above description of process 2200 is for illustrative purposes only and does not limit the scope of this specification. Those skilled in the art can make various modifications and changes to process 2200 under the guidance of this specification. However, these modifications and changes are still within the scope of this specification. For example, the locking groove can be changed to another form of locking element, the sliding groove of the storage tube can be eliminated, and the locking part 110 (or sliding part) of the clamping arm can slide directly on the inner wall of the storage tube, etc.

[0181] The beneficial effects that the embodiments of this application may bring include, but are not limited to:

[0182] (1) The side wall of the storage tube includes a long groove, a sliding groove, and a locking groove, all of which are concentrated in the long groove, simplifying the overall structure. By setting the long groove, the release and locking process of the clamping arm can be achieved through the simple long groove, which is easy to operate, maintains the locking reliability, and makes the release of the storage tube more convenient.

[0183] (2) The locking part of the clamping arm can directly enter the locking groove from the sliding groove to the proximal end, making the locking operation more convenient; and, based on the locking effect of the storage tube itself on the clamping arm, the locking part is locked by the locking groove, which can restrict the movement of the locking part to a certain range, restrict the movement of the clamping arm to the distal end to prevent the clamping part from opening again, restrict the movement of the clamping arm to the proximal end to prevent the clamping part from excessively entering the storage tube, and restrict the movement of the clamping arm relative to the circumferential direction of the storage tube to prevent the two from rotating relative to each other, thereby improving the reliability of the locking of the clamping arm and the storage tube.

[0184] (3) During the movement of the clamping arm from the distal end to the proximal end, the storage tube and the sheath are released first, and then the clamping arm and the storage tube are locked. This sequence ensures that the clamping arm will not continue to move after locking, thus ensuring the reliability of the lock.

[0185] (4) By actuating the first groove through the locking part, the side wall of the storage tube undergoes elastic deformation, thereby increasing the size of the first groove in the first direction, releasing the matching relationship between the connecting protrusion and the connecting groove, and improving the convenience of releasing the storage tube and the sheath tube.

[0186] (5) By setting a slot, the side wall of the storage tube is more easily deformed, avoiding excessive resistance when the locking part moves in the first slot.

[0187] (6) The proximal joint of at least two clamping parts is integrally formed, which improves the stability and symmetry of at least two clamping parts, thereby improving clamping stability.

[0188] (7) By setting an elastic element to drive the first connecting structure to quickly separate from the second connecting structure, the efficiency and reliability of releasing the receiving tube and the sheath tube are improved.

[0189] (8) By setting a limiting component, an assembly gap is formed between the first connecting structure and the second end face, avoiding the situation where the first connecting structure cannot be assembled because it is attached to the second end face, making the assembly of the storage tube and the sheath tube simpler.

[0190] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0191] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0192] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although some embodiments that are currently considered useful have been discussed by way of various examples in the foregoing disclosure, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. Rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments described herein.

[0193] Similarly, it should be noted that, in order to simplify the descriptions disclosed herein and thus aid in the understanding of one or more embodiments, the foregoing description of embodiments in this specification sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0194] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0195] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A clamping device, characterized in that, include: The clamping arm has a locking part at its proximal end; A receiving tube is provided, the proximal end of the clamping arm is movably disposed within the receiving tube, the receiving tube includes at least one elongated groove extending axially, the elongated groove includes a sliding groove, a locking groove and a first groove, the sliding groove is located at the distal end of the locking groove, and the first groove is located between the sliding groove and the locking groove; the dimension of the sliding groove in a first direction is greater than or equal to the dimension of the locking part in the first direction, and the dimension of the first groove in the first direction is smaller than the dimension of the locking part in the first direction; When the locking part and the sliding groove are engaged, the clamping arm switches between an open state and a closed state; When the locking part and the locking groove are engaged, the clamping arm is in a locked state.

2. The clamping device as described in claim 1, characterized in that, The clamp device further includes a sheath, the sheath includes a first connecting structure, and the storage tube includes a second connecting structure. The second connecting structure and the first connecting structure are releasably connected, so that the storage tube and the sheath are releasably connected. When the locking part is located in the first groove, it causes the second connecting structure to shift, thereby disengaging the first connecting structure and the second connecting structure and releasing the receiving tube and the sheath.

3. The clamping device as described in claim 2, characterized in that, The first connection structure includes a connecting protrusion; The elongated groove also includes a connecting groove located near the locking groove. The connecting groove forms the second connecting structure, and the connecting protrusion is releasably connected to the connecting groove.

4. The clamping device as described in claim 3, characterized in that, The elongated groove also includes a second groove, which extends from the proximal end of the connecting groove along the axial direction of the receiving tube to the proximal edge of the receiving tube. When the locking part is engaged with the first groove, the receiving tube deforms so that the size of the second groove in the first direction is greater than or equal to the size of the connecting protrusion in the first direction, and the connecting protrusion is disengaged from the connecting groove. When the locking part is not engaged with the first groove, the size of the second groove in the first direction is smaller than the size of the connecting protrusion in the first direction, and the proximal end of the connecting groove restricts the movement of the connecting protrusion toward the proximal end.

5. The clamping device as described in claim 4, characterized in that, The elongated slot also includes a third slot that extends from the locking slot to the connecting slot; the dimension of the third slot in the first direction is smaller than the dimension of the locking part in the first direction.

6. The clamping device as described in claim 1, characterized in that, The storage tube also includes at least one slot, which extends from the middle of the storage tube to the near edge of the storage tube, and the slot and the long slot are spaced apart along the circumferential direction of the storage tube.

7. The clamping device as described in claim 2, characterized in that, The sheath includes an elastic element disposed within the sheath channel, the proximal end of the elastic element being connected to the inner wall of the sheath, and the distal end of the elastic element being axially movable at the distal end of the sheath, with the first connecting structure disposed at the distal end of the elastic element. When the second connecting structure cooperates with the first connecting structure, the elastic element is in a stretched state; When the second connecting structure is disengaged from the first connecting structure, the elastic element causes the second connecting structure to separate from the first connecting structure, and the receiving tube and the sheath are released.

8. The clamping device as described in claim 2, characterized in that, The driving force F1 for the locking part to move within the first groove ranges from 30N to 50N.

9. The clamping device as described in claim 1, characterized in that, The range of the driving force F2 for the locking part to move within the sliding groove includes: 0 < F2 < 30 N.

10. The clamping device as described in claim 2, characterized in that, The receiving tube is rotatably disposed at the distal end of the sheath tube about the axis of the sheath tube.

11. The clamping device as claimed in claim 1, characterized in that, The clamping arm includes at least two clamping portions, each clamping portion including a distal joint portion, a curved portion and a proximal joint portion, wherein the proximal joint portion of the at least two clamping portions is integrally formed.

12. The clamping device as described in claim 11, characterized in that, The proximal joint includes a first connecting portion, the first connecting portion includes a pin hole, the clamping arm includes a connecting pin, the connecting pin is connected to the pin hole, and the two ends of the connecting pin constitute the locking portion; The proximal joint includes a second connecting part, the second connecting part includes a connecting hole, the clamping device includes a mandrel, the distal end of the mandrel is provided with a connecting end, the connecting end is releasably connected to the connecting hole.

13. The clamping device as described in claim 12, characterized in that, The proximal joint also includes a mounting groove that extends from the connection hole onto the first joint.

14. The clamping device as described in claim 12, characterized in that, The long groove includes a first limiting part, which is located at the proximal end of the locking groove; After the connecting pin abuts against and is limited by the first limiting part, the spindle moves from the far end to the near end, and the spindle drives the connecting end to disengage from the connecting hole, and the clamping arm is released from the spindle.

15. The clamping device as described in claim 14, characterized in that, The range of the driving force F3 for the connecting end to disengage from the connecting hole includes: 60N < F3 < 80N.

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