Clip device

Abstract

Provided in the embodiments of the present description is a clip device. The clip device comprises: clip arms; a storage tube, with proximal ends of the clip arms being stored in the storage tube; a sheath, with a proximal end of the storage tube being releasably connected to a distal end of the sheath; and a control ring, which can be in sliding fit with the storage tube for axial movement, and is configured to actuate the release of the storage tube from the sheath when the control ring moves from a distal end to a proximal end.

Description

A clamping device Cross-referencing

[0001] This application claims priority to Chinese application No. 202411533988.8, filed on October 30, 2024, and Chinese application No. 202510217886.3, filed on February 26, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This instruction manual relates to the field of medical devices, and in particular to a clamp device. Background Technology

[0003] Endoscopic clamp instruments are medical devices used in endoscopic surgery, primarily for hemostasis in cases of gastrointestinal bleeding, tumor resection, or other endoscopic procedures. These clamp instruments play a crucial role in endoscopic surgery, helping to reduce surgical complications and improve the safety and effectiveness of the procedure. Endoscopic clamp instruments require high operational precision and controllability; therefore, a simple and reliable clamp instrument is needed. Summary of the Invention

[0004] This specification provides one or more embodiments of a clamping device, comprising: a clamping arm; a receiving tube, the proximal end of the clamping arm being received in the receiving tube; a sheath, the proximal end of the receiving tube being releasably connected to the distal end of the sheath; and a control ring, the control ring being axially movable and slidingly engaged with the receiving tube, the control ring being configured to actuate the release of the receiving tube from the sheath when moving from the distal end to the proximal end.

[0005] This specification provides one or more embodiments of a clamping device, comprising: a clamping arm, at least two elastic cantilever arms disposed at the proximal end, the proximal ends of the at least two elastic cantilever arms forming a connecting snap; a receiving tube, including at least one elongated groove extending axially; a mandrel, the mandrel including a connecting end, the connecting end being disposed at the distal end of the mandrel, wherein the proximal end of at least one elastic cantilever arm includes a mating portion, at least a portion of the elongated groove forms a first groove portion, and when the mating portion mates with the first groove portion, the connecting snap is assembled with the connecting end by radial deformation or displacement.

[0006] This specification provides one or more embodiments of a clamping device, including: a clamping arm; a receiving tube, the proximal end of the clamping arm being received in the receiving tube; and a control ring axially movable and slidably engaged with the receiving tube, the control ring being configured to actuate and lock the clamping arm to the receiving tube when moving along the axial direction. Attached Figure Description

[0007] 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:

[0008] Figure 1 is an exemplary structural diagram of a clamping device according to some embodiments of this specification;

[0009] Figure 2 is a partial cross-sectional view of the distal structure of a clamping device according to some embodiments of this specification;

[0010] Figure 3 is a schematic diagram of the structure of the storage tube according to some embodiments of this specification;

[0011] Figure 4 is a schematic diagram of the control loop structure according to some embodiments of this specification;

[0012] Figure 5 is a schematic diagram of the assembled structure of the receiving tube and control ring according to some embodiments of this specification;

[0013] Figure 6 is a schematic diagram of the clamping arm according to some embodiments of this specification;

[0014] Figure 7 is a schematic diagram of the assembled structure of the clamping arm and the storage tube according to some embodiments of this specification;

[0015] Figure 8 is a schematic diagram of the control loop structure according to some embodiments of this specification;

[0016] Figure 9 is a schematic diagram of the structure after the housing tube and control ring are assembled according to some embodiments of this specification;

[0017] Figure 10 is another structural schematic diagram of the storage tube according to some embodiments of this specification;

[0018] Figure 11 is another schematic diagram of the control loop according to some embodiments of this specification;

[0019] Figure 12 is another structural schematic diagram of the assembled storage tube and control ring according to some embodiments of this specification;

[0020] Figure 13 is a schematic diagram of the assembled structure of the clamping arm, the storage tube, and the control ring according to some embodiments of this specification.

[0021] Figure 14 is a schematic diagram of the locking structure of the clamping arm and the storage tube according to some embodiments of this specification;

[0022] Figure 15 is another structural schematic diagram of the clamping arm according to some embodiments of this specification;

[0023] Figure 16 is another structural schematic diagram of the storage tube according to some embodiments of this specification;

[0024] Figure 17 is a schematic diagram of the structure of the outer tube according to some embodiments of this specification;

[0025] Figure 18 is another structural schematic diagram of the assembled clamping arm, storage tube, and control ring according to some embodiments of this specification.

[0026] Figure 19 is a schematic diagram of an external unlocking tool for unlocking the clamping arm according to some embodiments of this specification;

[0027] Figure 20 is another structural schematic diagram of the clamping arm according to some embodiments of this specification;

[0028] Figure 21 is another structural schematic diagram of the storage tube according to some embodiments of this specification;

[0029] Figure 22 is another schematic diagram of the control loop according to some embodiments of this specification;

[0030] Figure 23 is another structural schematic diagram of the assembled clamping arm, storage tube, and control ring according to some embodiments of this specification.

[0031] Figure 24 is another structural schematic diagram of the assembled clamping arm, storage tube, and control ring according to some embodiments of this specification.

[0032] Figure 25 is another structural schematic diagram of the assembled clamping arm, storage tube, and control ring according to some embodiments;

[0033] Figure 26 is an exemplary flowchart of an assembly method for a clamping device as shown in some embodiments of this specification;

[0034] Figure 27 is an exemplary flowchart of a release method for a clamping device as shown in some embodiments of this specification.

[0035] The attached figures are labeled as follows: 10, clamping device; 100, clamping arm; 110, mating part; 111, slot; 112, tool contact surface; 113, stop protrusion; 120, clamping part; 121, distal joint; 122, bending part; 123, proximal joint; 130, elastic cantilever; 140, connecting buckle; 141, buckle piece; 142, first limiting structure; 143, second limiting structure; 150, stop; 200, conveying part; 210, sheath; 211, second connecting part; 220, spindle; 221, connecting end; 222, connector; 223, limiting groove; 300, control part; 310, fixed handle; 32 0. Sliding handle; 400. Storage tube; 410. Long groove; 411. First groove; 4111. Guide slope; 412. Second groove; 413. Third groove; 414. Locking step; 420. First connecting part; 421. Protrusion; 430. Trigger protrusion; 440. First limiting recess; 450. Second limiting recess; 460. Stop plate; 500. Control ring; 510. Clearance hole; 520. Abutment part; 530. Clearance groove; 531. First clearance groove; 532. Second clearance groove; 540. Spring piece; 541. Hook; 542. Extension part; 600. Outer tube; 610. Disassembly groove; 20. External unlocking tool. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Clamping instruments are common surgical instruments used in endoscopy. During surgery, clamping instruments achieve hemostasis by clamping tissue wounds. Traditional clamping instruments clamp the tissue, then lock the clamping part with a locking mechanism. The clamping part and locking mechanism are then released from the sheath and held in the wound position. However, traditional clamping instruments still have some problems: for example, the connection structure between the sheath and the storage tube is complex, leading to complicated separation operations or damage to the clamping instrument during separation, affecting the release effect; furthermore, the loading of the clamping arms and mandrel is cumbersome or difficult, and the connection strength between the clamping arms and mandrel is unstable.

[0040] Therefore, in some embodiments of this specification, it is desirable to provide a clamping device comprising a clamping arm, a receiving tube, a control ring, and a sheath, wherein the receiving tube and sheath can be easily and conveniently released via the control ring. Other embodiments of this specification also provide a clamping device in which a flexible cantilever is provided at the proximal end of the clamping arm, the flexible cantilever forming a connecting buckle, which is releasably connected to a mandrel, thereby improving the connection stability between the clamping arm and the mandrel. Still other embodiments of this specification also provide a clamping device that can also lock the clamping arm and the receiving tube by moving the control ring along the axial direction, so that the clamping arm remains in a corresponding state (e.g., open or closed), ensuring control stability.

[0041] Figure 1 is an exemplary structural diagram of a clamping device 10 according to some embodiments of this specification.

[0042] As shown in Figure 1, in some embodiments, the clamp device 10 includes a clamp arm 100, a delivery section 200, and a control section 300. The control section 300 is located at the proximal end of the delivery section 200, and the clamp arm 100 is located at the distal end of the delivery section 200. The control section 300 can control the clamp arm 100 to clamp the wound, thereby achieving hemostasis and wound closure. In the embodiments of this specification, "proximal" and "distal" can refer to directions. "Proximal" means the side facing the operator (e.g., the doctor or nurse operating the clamp device 10) along the axial direction of the clamp device 10 (or the extension direction of the sheath 210 of the delivery section 200), while "distal" means the side facing the patient for treatment (or the side away from the operator). It is worth noting that "proximal" and "distal" can refer to portions of the structure located in the corresponding directions and should not be construed as referring only to the ends.

[0043] In some embodiments, the delivery unit 200 includes a sheath 210 and a mandrel 220 (shown in FIG. 2). The mandrel 220 is disposed within the channel of the sheath 210 and extends axially along the sheath 210. The proximal end of the mandrel 220 is connected to the control unit 300, and the distal end of the mandrel 220 is connected to the clamping arm 100 (e.g., a releasable connection). The terms "axial" and "radial" used in the embodiments of this specification can refer to directions. The axial direction is the direction in which the channel of the sheath 210 extends, and the radial direction is perpendicular to the direction in which the channel of the sheath 210 extends.

[0044] 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 operator controls the sliding handle 320 to move axially along the fixed handle 310 from outside the body, thereby controlling the axial movement of the mandrel 220 within the sheath 210 channel, so that the clamp arm 100 can complete the corresponding surgical operation, such as opening, closing, locking, releasing, etc.

[0045] This specification provides several embodiments of a clamping device, aiming to solve problems such as unsatisfactory release effects of the storage tube and sheath of the clamping device 10, or poor connection stability of the mandrel and clamping arm of the clamping device 10. Without contradiction, one or more features, structures, or characteristics among the various embodiments of this specification (e.g., Embodiments 1 to 10) can be appropriately combined or referenced.

[0046] As shown in Figures 2 to 7, Embodiment 1 of this specification provides a clamp device 10, which includes a clamp arm 100, a storage tube 400, a sheath tube 210, a spindle 220, and a control ring 500.

[0047] In some embodiments, the receiving tube 400 (e.g., the proximal end of the receiving tube 400) is releasably connected to the sheath 210 (e.g., the distal end of the sheath 210). Further details regarding the releasable connection between the receiving tube 400 and the sheath 210 can be found in the relevant section below.

[0048] In some embodiments, the clamping arm 100 (e.g., the proximal end of the clamping arm 100) is releasably connected to the spindle 220 (e.g., the distal end of the spindle 220). Further details regarding the releasable connection between the clamping arm 100 and the spindle 220 can be found in the relevant section below.

[0049] In some embodiments, the clamping arm 100 can be locked and unlocked from the storage tube 400. More information regarding the locking and unlocking of the clamping arm 100 and the storage tube 400 can be found in the relevant section below.

[0050] The clamp arm 100 is a structure for clamping the target object. In endoscopic surgery, the clamp arm 100 can grasp diseased tissue, clamp bleeding points or gastrointestinal wounds, and can also fix auxiliary instruments or materials such as catheters.

[0051] In some embodiments, as shown in FIG6, the clamping arm 100 includes at least two clamping portions 120, which clamp a target object (e.g., a tissue wound) by opening and closing operations, thereby keeping the target object closed. When the clamping arm 100 moves from proximal to distal 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 distal to proximal relative to the receiving tube 400, causing the distal ends of the at least two clamping portions 120 to move closer together, the clamping arm 100 is in a closed state.

[0052] In some embodiments, as shown in FIG2, the clamping portion 120 includes a distal engagement portion 121, a bent portion 122, and a proximal engagement portion 123. The proximal end of the clamping arm 100 is housed in the receiving tube 400, where the proximal end of the clamping arm 100 may include the bent portion 122 and / or the proximal engagement portion 123. It is worth noting that, as shown in FIG7, when the proximal end of the clamping arm 100 is housed in the receiving tube 400, a portion of the structure of the proximal end of the clamping arm 100 may be inside the receiving tube 400, and a portion of the structure may be outside the receiving tube 400. When the proximal end of the clamping arm 100 is housed in the receiving tube 400, the entire structure of the proximal end of the clamping arm 100 may also be located inside the receiving tube 400. Specifically, the proximal engagement portion 123 is an annular structure, which fixes the proximal ends of at least two clamping portions 120. A hollow channel is formed in the middle of the proximal connecting portion 123. The proximal connecting portion 123 of the clamping arm 100 is always located inside the receiving tube 400 for releasable connection with the mandrel 220. The bending portion 122 is elastic and includes a retracted state and an extended state relative to the receiving tube 400. The retracted state can mean that the bending portion 122 is at least partially retracted into the receiving tube 400, and the extended state can mean that the bending portion 122 extends out of the distal end of the receiving tube 400. In the retracted state, after the bending portion 122 enters the receiving tube 400, it undergoes elastic deformation or displacement due to the spatial constraint of the receiving tube 400, thereby closing the distal connecting portion 121. In the extended state, after the bending portion 122 extends out of the receiving tube 400, it bends under its own elastic restoring force, thereby opening the distal connecting portion 121. The distal connecting portion 121 refers to the part used to clamp the target object, and the distal connecting portion 121 is always located outside the receiving tube 400.

[0053] In some embodiments, the clamping arm 100 may further include at least two elastic cantilever arms 130 disposed at its proximal end, the proximal ends of the at least two elastic cantilever arms 130 forming a connecting snap fastener 140, which is configured to be releasably connected to the connecting end 221. For example, the proximal ends of the two elastic cantilever arms 130 each include a semi-circular annular structure, and the semi-circular structures of the two elastic cantilever arms 130 form an annular structure, and the connecting snap fastener 140 may be the aforementioned annular structure. More details regarding the releasable connection between the connecting snap fastener 140 and the connecting end 221 can be found in the relevant description below. By setting the elastic cantilever arms 130 to form the connecting snap fastener 140, the length of the elastic cantilever arms 130 can be maximized without affecting the proximal strength of the clamping arm 100, providing more ample accommodating space for the connecting snap fastener 140 and ensuring a more reliable connection between the connecting snap fastener 140 and the connecting end 221. At least one resilient cantilever 130 may include a mating portion 110 at its proximal end, which movably engages with an elongated groove 410 in the receiving tube 400. When the mating portion 110 moves along the elongated groove 410, the clamping arm 100 can be switched between an open state and a closed state.

[0054] The storage tube 400 can be used to store at least a portion of the clamping arm 100 and to switch the clamping arm 100 between an open state and a closed state.

[0055] In some embodiments, as shown in FIG3, a stop plate 460 is provided at the distal end of the receiving tube 400. The stop plate 460 is located between at least two clamping portions 120 and is used to limit the extreme position of the clamping arm 100 in distal movement. For example, there is one or two stop plates 460. When one stop plate 460 is provided, at least one end of the stop plate 460 is fixed to the distal end of the receiving tube 400. When two stop plates 460 are provided, one end of the stop plate 460 is fixed to the receiving tube 400, and the other end is a suspended end. For example, when the clamping arm 100 moves to the extreme position in distal movement, the connecting end 221 or the proximal joint 123 abuts against the stop plate 460 to prevent the clamping arm 100 from overextending the receiving tube 400. In some other embodiments, the stop plate 460 also has the function of spreading the clamping portions 120 during the opening process of the clamping arm 100.

[0056] In some embodiments, as shown in FIG3, the receiving tube 400 includes at least one elongated groove 410 extending axially. A mating portion 110 movably engages with the elongated groove 410 to switch the clamping arm 100 between an open and closed state. For example, the mating portion 110 may contact the wall of the elongated groove 410, allowing the clamping arm 100 to move axially along the receiving tube 400 under the guidance of the elongated groove 410. As another example, the mating portion 110 may be located within the area defined by the elongated groove 410, but spaced from the wall of the elongated groove 410, allowing the clamping arm 100 to move axially and / or radially within the space defined by the elongated groove 410. For example, one elongated groove 410 may be included. For example, at least two elongated grooves 410 may be included, spaced apart in the circumferential direction of the receiving tube 400, for example, the wall of the receiving tube 400 may have two elongated grooves 410 spaced 180° apart in the circumferential direction.

[0057] In some embodiments (e.g., in Embodiment 1), as shown in FIG3, the elongated slot 410 may penetrate the proximal end of the receiving tube 400 to form an opening. In other embodiments, the elongated slot 410 may not penetrate the proximal end of the receiving tube 400. In some embodiments (e.g., in Embodiment 1), as shown in FIG3, the elongated slot 410 does not penetrate the distal end of the receiving tube 400 to prevent the proximal end of the clamping arm 100 from detaching from the receiving tube 400.

[0058] In some embodiments, the elongated groove 410 is configured to have at least one of a first groove portion 411, a second groove portion 412, and a third groove portion 413.

[0059] In some embodiments, the elongated groove 410 at least partially comprises a second groove portion 412, which is configured to guide the clamping arm 100 to move axially along the receiving tube 400. The mating portion 110 moves along the elongated groove 410 to switch the clamping arm 100 between an open and closed state. Specifically, when the mating portion 110 of the clamping arm 100 engages with the second groove portion 412, the clamping arm 100 switches between an open and closed state. That is, when the mating portion 110 moves distally along the second groove portion 412, the clamping arm 100 extends out of the receiving tube 400 and opens. When the mating portion 110 moves proximally along the second groove portion 412, the clamping arm 100 retracts into the receiving tube 400 and closes. The mating portion 110 can reciprocate within the second groove portion 412, enabling the clamping arm 100 to repeatedly open and close, facilitating timely correction of the clamping position by the operator and rapid hemostasis.

[0060] In some embodiments, the second groove 412 can restrict the radial movement of the connecting latch 140 of the clamping arm 100. Specifically, as shown in FIG6, the mating part 110 includes a slot 111, which engages with the second groove 412 to form a radial limit, thereby restricting the elastic cantilever 130 from deforming or displacing radially, keeping the connecting latch 140 enclosed by the elastic cantilever 130 connected to the connecting end 221, achieving higher connection strength before release, and preventing the clamping arm 100 and the connecting end 221 from prematurely releasing before locking. In some embodiments, the mating part 110 is configured as a support arm arranged radially or substantially radially. The slot 111 is configured as a U-shaped slot or L-shaped slot provided on the support arm, and the slot 111 includes a limiting step. The limiting step can abut against the inner wall of the receiving tube 400 at the edge of the second groove 412, thereby restricting the mating part 110 from moving radially outward, and thus restricting the elastic cantilever 130 from deforming or displacing radially. In other embodiments, the radial deformation or displacement of the elastic cantilever 130 can also be limited by other structures in the clamping device 10. For example, the radial deformation or displacement of the elastic cantilever 130 can also be limited by the stop protrusion 113, and further description of the foregoing examples can be found in the relevant description of Embodiment 5.

[0061] In some other embodiments, the second groove 412 may be replaced by a guide rail or magnetic strip provided on the inner wall surface of the receiving tube 400. For example, the inner wall surface of the receiving tube 400 is provided with an axially extending guide rail, and the mating part 110 includes a slider, which engages with the guide rail to cause the clamping arm 100 to move axially relative to the receiving tube 400. As another example, the inner wall surface of the receiving tube 400 is provided with a magnetic strip, and the mating part 110 includes a magnetic head, which engages with the magnetic strip to cause the clamping arm 100 to move axially relative to the receiving tube 400.

[0062] In some embodiments, at least a portion of the elongated groove 410 constitutes a first groove 411, which is located at the distal end of a second groove 412. The width of the first groove 411 is configured to allow the mating portion 110 to move radially outward within the first groove 411. For example, the width of the first groove 411 is greater than the width of the second groove 412 and greater than the width characteristic dimension of the mating portion 110, wherein the width characteristic dimension of the mating portion 110 refers to the dimension of the mating portion 110 in the width direction. When the mating portion 110 mates with the first groove 411, the connecting snap 140 is assembled with the connecting end 221 by radial deformation or displacement. In some embodiments, the first groove 411 includes a guide ramp 4111 that smoothly transitions from the first groove 411 to the second groove 412, allowing the mating portion 110 to accurately and smoothly enter the second groove 412.

[0063] In some embodiments, at least a portion of the elongated groove 410 constitutes a third groove 413, which is located near the end of the second groove 412. The width of the third groove 413 is configured to allow the mating portion 110 to move radially outward within the third groove 413. When the mating portion 110 engages with the third groove 413, the connecting latch 140 disengages from the connecting end 221 by radial deformation or displacement.

[0064] It is worth noting that the arrangement of each groove in the long groove 410 can be customized as needed. For example, in Embodiment 1 shown in Figure 3, the long groove 410 may also include a first groove 411, a second groove 412, and a third groove 413. As another example, in Embodiment 4 shown in Figure 16, the long groove 410 may include only the second groove 412 and the third groove 413.

[0065] The control ring 500 can be used to control the receiving tube 400 and / or the clamping arm 100. For example, when the control ring 500 moves from the distal end to the proximal end, it can actuate the receiving tube 400 and the sheath 210 to release. As another example, when the control ring 500 moves axially, it can actuate the clamping arm 100 and the receiving tube 400 to lock.

[0066] In some embodiments (as shown in Embodiment 1 of Figures 4 and 5), the control ring 500 may include a clearance groove 530 to prevent the control ring 500 from prematurely abutting against the clamping arm 100. For example, the axial position of the control ring 500 may overlap with the axial positions of the first groove portion 411 and the second groove portion 412 in the elongated groove 410. Correspondingly, the control ring 500 may include a clearance groove 530 corresponding to the aforementioned first groove portion 411 and second groove portion 412. When the mating part 110 moves along the first groove portion 411 and the second groove portion 412, the clearance groove 530 provides space for the mating part 110 to move, keeping the control ring 500 in its initial position. When the mating part 110 moves from the second groove portion 412 to the third groove portion 413, the mating part 110 may abut against the control ring 500, driving the control ring 500 to move to the trigger position. In some embodiments, at the same axial position, the width of the clearance groove 530 is not less than the width of the elongated groove 410 to avoid interfering with the movement of the mating part 110.

[0067] In Embodiment 1, the length of the control ring 500 is less than the length of the long groove 410. The clearance groove 530 is constructed to extend axially along the control ring 500 to its distal end and to form an opening through the distal end of the control ring 500. After the mating part 110 moves a predetermined distance proximally along the long groove 410, the mating part 110 enters the clearance groove 530 and moves proximally until it abuts against the control ring 500 to drive the control ring 500 to move. The opening of the clearance groove 530 is chamfered, which is used to guide the mating part 110 to accurately enter the clearance groove 530, ensuring that the mating part 110 and the abutment part 520 are accurately aligned. By shortening the axial length of the control ring 500, the weight of the clamp instrument 10 retained on the tissue can be reduced, making the structure more streamlined.

[0068] In some other embodiments, the arrangement of the clearance slot 530 may differ from that in Embodiment 1. For example, in Embodiment 4 as shown in FIG18, the control ring 500 may not include the clearance slot 530 corresponding to the elongated slot 410. As another example, in Embodiment 5 as shown in FIG22, the control ring 500 may include a first clearance slot 531 and a second clearance slot 532.

[0069] The spindle 220 is a structure capable of drivingly connecting the clamping arm 100 and the control unit 300. When the spindle 220 is connected to the clamping arm 100, the operator can drive the spindle 220 to move axially through the control unit 300, thereby controlling the clamping arm 100 to move axially.

[0070] The sheath 210 is a structure capable of accommodating the spindle 210. Furthermore, the sheath 210 can be releasably connected to the storage tube 400. When the operator drives the spindle 220 to move axially via the control unit 300, the positions of the sheath 210 and the storage tube 400 do not change.

[0071] The following description uses Embodiment 1 as an example to further illustrate the assembly and use of the clamping device 10 (e.g., locking of the clamping arm 100). It is worth noting that the following description also applies to other embodiments of this specification, unless there is contradiction. Therefore, the assembly and use of the clamping device 10 will not be described in detail in other embodiments.

[0072] In some embodiments, the proximal end of the receiving tube 400 is releasably connected to the distal end of the sheath 210. Here, "releasable connection" in these embodiments refers to the two components maintaining a connection when preset conditions are met (e.g., when the two components form a limiting fit), and releasing and separating from each other when the preset conditions are not met (e.g., when the two components release the limiting fit). After the receiving tube 400 and sheath 210 are released, the receiving tube 400 and clamping arm 100 can be held at the target object; for example, the receiving tube 400 and clamping arm 100 can remain at the wound site to achieve hemostasis, while other components such as the sheath 210 and mandrel 220 are withdrawn from the body.

[0073] In some embodiments, the control ring 500 is axially movable and slidably engaged with the receiving tube 400. When the control ring 500 moves from the distal end to the proximal end, it actuates the receiving tube 400 and the sheath 210 to release.

[0074] In some embodiments, as shown in Figures 2 and 3, the outer wall surface of the receiving tube 400 includes a first connecting portion 420, and the inner wall surface of the sheath tube 210 includes a second connecting portion 211. The first connecting portion 420 and the second connecting portion 211 are releasably connected. The aforementioned outer wall surface can refer to the radially outward (e.g., away from the hollow channel of the tubular structure) wall, and the inner wall surface can refer to the radially inward (e.g., close to the hollow channel of the tubular structure) wall. For example, the connection method of the first connecting portion 420 and the second connecting portion 211 includes, but is not limited to, a press-lock connection, an electromagnetic induction connection, a snap-fit ​​connection, and a threaded connection.

[0075] In some embodiments, one of the first connecting portion 420 and the second connecting portion 211 may be assembled with and / or disassembled with the other by radial deformation or displacement.

[0076] In some embodiments, one of the first connecting portion 420 and the second connecting portion 211 includes a connecting protrusion, and the other includes a connecting groove, wherein the connecting protrusion is releasably engaged in the connecting groove. Exemplarily, one of the connecting groove or the connecting protrusion can be assembled with the other by radial deformation or displacement, and the assembled connecting groove and the connecting protrusion can be disassembled from the other by radial deformation or displacement. The aforementioned connecting protrusion and / or connecting groove can be arranged in a ring shape in the corresponding tubular structure (e.g., the receiving tube 400, the sheath 210), allowing the connecting protrusion and the connecting groove to mate in any circumferential direction. That is, the receiving tube 400 and the sheath 210 do not need to identify the mating direction during assembly, which greatly reduces the assembly difficulty of the receiving tube 400 and the sheath 210 for small-sized clamping devices 10. For example, the outer wall surface of the receiving tube 400 may include a first diameter segment and a second diameter segment. The first diameter segment is located at the distal end of the second diameter segment, and the radial dimension of the second diameter segment is smaller than that of the first diameter segment. The connection between the first and second diameter segments is a stepped structure. The first connecting portion 420 includes a protrusion 421 disposed on the second diameter segment. The aforementioned stepped structure can form a connecting groove with the protrusion 421. The second connecting portion 211 includes a connecting protrusion (also referred to as an annular flange) arranged radially inward. The connecting groove can be releasably engaged with the annular flange. Specifically, the radial dimension of the proximal portion of the protrusion 421 can gradually increase from the proximal end to the distal end, so that the protrusion 421 includes an inclined surface that slopes from the proximal end to the distal end. A radially limiting surface is formed on the proximal side of the annular flange. When the proximal end of the protrusion 421 abuts against the annular flange, the inclined surface of the protrusion 421 can guide the annular flange to slide to the distal end of the protrusion 421 and pass over the distal end of the protrusion 421 into the connecting groove. The distal end of the protrusion 421 forms a limiting engagement with the limiting surface on the proximal side of the annular flange. The proximal end face of the stepped structure can form a limiting engagement with the limiting surface on the distal side of the annular flange. For example, the protrusion 421 in the first connecting portion 420 can also directly form a connecting protrusion, and the inner wall surface of the second connecting portion 211 includes an annular flange that runs radially inward, with the connecting groove releasably disposed in the annular flange.

[0077] In some embodiments, as shown in Figures 3 to 5, a control ring 500 is sleeved on the receiving tube 400. The control ring 500 can actuate the wall of the receiving tube 400 to deform or displace radially inward, causing the first connecting part 420 to move radially inward until it is disengaged from the second connecting part 211. Specifically, since the first connecting part 420 is located on the outer wall of the receiving tube 400 and the second connecting part 211 is located on the inner wall of the sheath tube 210, when the control ring 500 actuates the wall of the receiving tube 400 to deform or displace radially inward, the first connecting part 420 moves inward, thereby disengaging from the second connecting part 211 and releasing the receiving tube 400 from the sheath tube 210.

[0078] The following section of this manual will explain how the control loop 500 actuates the radial inward deformation or displacement of the wall of the receiving tube 400.

[0079] The receiving tube 400 may include a variable area, which may be deformed or displaced. The first connecting part 420 is located in the variable area. The control ring 500 can deform or displace the variable area radially inward by squeezing or other means, thereby disengaging the first connecting part 420 from the second connecting part 211.

[0080] In some embodiments, the receiving tube 400 forms a variable region by slotting its wall (such as a long slot 410). Alternatively, an axially extending support arm is provided at the proximal end of the receiving tube 400, which forms the variable region. Alternatively, the receiving tube 400 forms the variable region by adding a flexible material to a portion of its wall.

[0081] In some embodiments, the control ring 500 is movably fitted onto the outside of the elongated groove 410 of the receiving tube 400, and at least a portion of the mating part 110 extends out of the elongated groove 410, so that the mating part 110 can move along the elongated groove 410 from the distal end to the proximal end to abut against the control ring 500, and drive the control ring 500 to move from the distal end to the proximal end, thereby causing the tube wall of the receiving tube 400 to deform or displace radially inward, and the receiving tube 400 and the sheath 210 to be released. The mating part 110 can abut against the abutting part 520 of the control ring 500 to drive the control ring 500 to move from the distal end to the proximal end. As shown in FIG. 5, the abutting part 520 can form the proximal groove surface of the clearance groove 530, or it can be other structures in the control ring 500. For example, as shown in FIG. 18, the abutting part 520 can also be the distal end surface of the control ring 500.

[0082] In some embodiments, a trigger portion is provided on the outer wall surface of the receiving tube 400, and an actuating portion is provided on the inner wall surface of the control ring 500. The maximum radial distance of the trigger portion relative to the central axis of the receiving tube 400 is greater than the radial distance of the innermost edge of the actuating portion relative to the central axis of the receiving tube 400. The control ring 500 may include an initial position, in which the tube wall of the receiving tube 400 will not deform or displace radially inward. The control ring 500 may also include a triggered position, in which the trigger portion abuts against the actuating portion, causing the tube wall of the receiving tube 400 to deform or displace radially inward.

[0083] For example, as shown in Figures 3 and 5, the triggering part may include a trigger protrusion 430, which protrudes from the outer wall surface of the receiving tube 400 and is configured to trigger the receiving tube 400 to deform or displace radially inward in response to the movement or position of the control ring 500. The actuating part may include the inner wall surface of the control ring 500. In the initial position, the radial distance between the outermost edge of the trigger protrusion 430 and the central axis of the receiving tube 400 is greater than the inner radius of the control ring 500, and the outer wall surface of the receiving tube 400 is in contact with the inner wall surface of the control ring 500; wherein, the outermost edge of the trigger protrusion 430 refers to the outermost end of the trigger protrusion 430 protruding radially outward. At this time, the control ring 500 does not generate a radial force on the receiving tube 400, and the receiving tube 400 is in a natural state, without radial deformation or displacement. At the trigger position, the outer wall surface of the trigger protrusion 430 abuts against the inner wall surface of the control ring 500. The control ring 500 exerts a radial force inward on the trigger protrusion 430, causing the wall of the receiving tube 400 to deform or displace radially inward. By setting the control ring 500 and the trigger protrusion 430, the deformation or displacement of the wall of the receiving tube 400 can be triggered simply by moving the control ring 500. This method is simple to operate, has high control precision, and reduces the risk of misoperation.

[0084] In Embodiment 1, as shown in Figures 3 and 5, the distal end of the trigger protrusion 430 is provided with a slope. The radial distance between the outermost edge of the slope and the central axis of the receiving tube 400 gradually increases from the distal end to the proximal end, so that the trigger protrusion 430 in the control ring 500 can smoothly abut against the inner wall surface of the control ring 500, ensuring the stability and smoothness of the clamping operation.

[0085] In Embodiment 1, as shown in Figures 4 and 5, the control ring 500 is provided with a clearance hole 510. In the initial position, the trigger protrusion 430 is located in the clearance hole 510, and the two cooperate. At this time, the control ring 500 does not exert radial force on the receiving tube 400, and the receiving tube 400 is in a state of no deformation or displacement. When the control ring 500 moves from the distal end to the proximal end, it drives the clearance hole 510 to move from the distal end to the proximal end. The clearance hole 510 and the trigger protrusion 430 are misaligned, and the inclined surface at the distal end of the trigger protrusion 430 can guide the inner wall surface of the control ring 500 to abut against the trigger protrusion 430, that is, guide the control ring 500 to move to the trigger position. The control ring 500 causes the tube wall of the receiving tube 400 to deform or displace radially inward by squeezing the trigger protrusion 430, thereby releasing the first connecting part 420 of the receiving tube 400 and the second connecting part 211 of the sheath tube 210. During the movement of the control ring 500, the trigger cam 430 can generate a certain feedback resistance to the control ring 500, which can promptly prompt the operator about the changes in the receiving tube 400, enabling the operator to control the movement of the clamping arm 100 more precisely.

[0086] It is worth noting that the aforementioned triggering part and actuating part can also be configured in other ways. For example, the triggering part can also include a portion of the outer wall surface of the receiving tube 400, the aforementioned portion of the outer wall surface being located at the distal end of the receiving tube 400, and the maximum radial distance of this portion of the outer wall surface relative to the central axis of the receiving tube 400 being greater than the radial distance of the innermost edge of the actuating part relative to the central axis of the receiving tube 400. As another example, the actuating part can also include a protruding structure disposed on the inner wall surface of the control ring 500. When the control ring 500 is in the initial position, the aforementioned protruding structure does not contact the triggering part, and at this time, the tube wall of the receiving tube 400 will not deform or displace radially inward; when the control ring 500 is in the triggering position, the aforementioned protruding structure abuts against the inner wall surface of the control ring 500, and the control ring 500 generates a radially inward radial force on the triggering protrusion 430, causing the tube wall of the receiving tube 400 to deform or displace radially inward.

[0087] In some embodiments of this specification, the movement of the control ring 500 can trigger deformation or displacement of the wall of the receiving tube 400, thereby actuating the release of the receiving tube 400 and the sheath tube 210. This avoids directly setting the clamping arm 100 and the sheath tube 210 as a releasable connection, which simplifies the structure of the clamping arm 100, makes the operation simple, has high control precision, and reduces the risk of misoperation.

[0088] Based on the aforementioned structural configuration, when it is necessary to release the storage tube 400 and sheath 210 in the clamp device 10, the operator can control the clamp arm 100 to move from the distal end to the proximal end through the control unit 300, thereby driving the control ring 500 to move from the distal end to the proximal end, thereby releasing the connection between the first connecting part 420 and the second connecting part 211, and actuating the release of the storage tube 400 and sheath 210.

[0089] Based on the aforementioned structural configuration, when it is necessary to connect the storage tube 400 and the sheath tube 210, the operator can align the storage tube 400 and the sheath tube 210 to form a limiting position, thereby achieving the connection between the storage tube 400 and the sheath tube 210. For example, after the operator inserts the proximal end of the storage tube 400 into the distal end of the sheath tube 210, the first connecting part 420 can be connected to the second connecting part 211 (e.g., the connecting protrusion can be fitted into the connecting groove).

[0090] In some embodiments, the clamping arm 100 and the spindle 220 are releasably connected. Specifically, the proximal ends of at least two elastic cantilever arms 130 located near the proximal end of the clamping arm 100 can be closed to form a connecting snap 140. The spindle 220, located in the hollow channel of the sheath 210, includes a connecting end 221 located at the distal end of the spindle 220. The connecting end 221 is releasably connected to the connecting snap 140, thereby achieving a releasable connection between the clamping arm 100 and the spindle 220.

[0091] The assembly and release of the clamp arm 100 and the spindle 220 will be described below in this manual.

[0092] In Embodiment 1, as shown in Figure 2, the distal end of the connecting end 221 includes a connector 222, and the proximal end of the connecting end 221 includes a limiting groove 223. When the mating part 110 mates with the first groove 411, the connecting buckle 140 is assembled with the connecting end 221 by radial deformation or displacement. The assembly process of the connecting end 221 and the connecting buckle 140 may include: the connector 222 moving from the proximal end to the distal end, causing the elastic cantilever 130 to deform or displace radially outward in the first groove 411; the connector 222 passing through the connecting buckle 140; and the elastic cantilever 130 deforming or displaced radially inward or outward in the first groove 411 and recovering its deformation. At this time, the connecting buckle 140 is fitted onto the limiting groove 223 to form a limit. The radial dimension of the distal end of the connector 222 gradually increases from the distal end to the proximal end to facilitate the connector 222 passing through the connecting buckle 140.

[0093] In Embodiment 1, when the mating part 110 engages with the third groove 413, the connecting buckle 140 disengages from the connecting end 221 by radial deformation or displacement. The process of disengaging the connecting end 221 from the connecting buckle 140 may include: when the mating part 110 of the clamping arm 100 enters the third groove 413 and the clamping arm 100 is restricted from continuing to move proximally, and the spindle 220 continues to move from distal to proximally, when the tension between the connecting end 221 and the clamping arm 100 reaches a certain force value, the connecting buckle 140 actuates the elastic cantilever 130 to deform or displace radially outward in the third groove 413, the connecting buckle 140 exits the limiting groove 223, and the connecting end 221 disengages from the connecting buckle 140. The radial dimension of the proximal end of connector 222 gradually decreases from the distal end to the proximal end. The proximal end face of connector 222 can form the distal end groove face of limiting groove 223 to facilitate the disengagement of the connecting buckle 140 from limiting groove 223. For details regarding the restriction of the clamping arm 100 from continuing to move from the distal end to the proximal end, please refer to the relevant description of the locking of clamping arm 100 and receiving tube 400 below in this manual.

[0094] Based on the aforementioned structural configuration, when it is necessary to assemble the clamp arm 100 and the spindle 220 in the clamping device 10, the operator can control the spindle 220 to move from the proximal end to the distal end through the control unit 300, causing the connecting buckle 140 in the clamp arm 100 to be sleeved on the limiting groove 223 in the first groove 411 to form a limit, thereby realizing the assembly of the clamp arm 100 and the spindle 220.

[0095] Based on the aforementioned structural configuration, when it is necessary to release the clamp arm 100 and the spindle 22 in the clamping device 10, the operator can control the spindle 220 through the control unit 300 and drive the clamp arm 100 to move from the distal end to the proximal end, thereby causing the connecting buckle 140 in the clamp arm 100 to exit the limiting groove 223 in the third groove 413 to release the limit, thus realizing the release of the clamp arm 100 and the spindle 220.

[0096] In some embodiments of this specification, the clamping arm 100 and the mandrel 220 are assembled by the engagement of the mating part 110 and the first groove part 411, and the clamping arm 100 and the mandrel 220 are released by the engagement of the mating part 110 and the third groove part 413. The assembly process is simple and easy to operate.

[0097] In some embodiments, the clamp device 10 can be assembled and released via the releasable clamp arm 100 and spindle 220, as well as the releasable storage tube 400 and sheath 210.

[0098] The assembly process of the clamp device 10 may include: extending the proximal end of the clamp arm 100 into the receiving tube 400 to form a first assembly component; extending the mandrel 220 into the sheath tube 210 to form a second assembly component; docking the receiving tube 400 and the sheath tube 210 to form a limiting position, thereby connecting the receiving tube 400 and the sheath tube 210; assembling the connecting end 221 in the mandrel 220 to the connecting buckle 140 in the clamp arm 100, thereby connecting the mandrel 220 and the clamp arm 100; the connection between the receiving tube 400 and the sheath tube 210 achieves the external connection between the first assembly component and the second assembly component, and the connection between the mandrel 220 and the clamp arm 100 achieves the internal connection between the first assembly component and the second assembly component, thereby completing the assembly of the clamp device 10. It is worth noting that when assembling the clamp device 10, the first assembly component can be assembled first, the second assembly component can be assembled first, or both can be assembled simultaneously.

[0099] The release process of the clamp device 10 may include: controlling the clamp arm 100 to move from the distal end to the proximal end via the control unit 300, triggering the storage tube to deform radially inward; controlling the mandrel 220 to continue moving proximally, releasing the connection between the mandrel 220 and the clamp arm 100; controlling the sheath 210 to continue moving proximally, releasing the connection between the storage tube 400 and the sheath 210, thereby releasing the clamp device 10. After releasing the connection between the storage tube 400 and the sheath 210, the external connection between the first assembly assembly and the second assembly assembly is released. After releasing the connection between the mandrel 220 and the clamp arm 100, the internal connection between the first assembly assembly and the second assembly assembly is released. At this time, the clamp device 10 includes a first assembly assembly and a second assembly assembly that are not connected to each other. The first assembly assembly can remain in the patient's body to maintain clamping of the target object, and the operator can control the second assembly assembly to exit the patient's body.

[0100] In some embodiments, the control ring 500 may also be configured to actuate the clamping arm 100 to lock with the receiving tube 400 during axial movement, thereby maintaining the clamping arm 100's grip on the target object. For example, the control ring 500 may be configured to cause radial inward deformation or displacement of the wall of the receiving tube 400 during movement from the distal end to the proximal end, thereby actuating the clamping arm 100 to lock with the receiving tube 400. Further details on how to cause radial inward deformation or displacement of the wall of the receiving tube 400 can be found in the relevant description above in this specification.

[0101] Locking the clamping arm 100 to the storage tube 400 may include restricting the movement of the clamping arm 100 to the distal end.

[0102] In some embodiments, the elongated groove 410 may be provided with a first locking part, and the mating part 110 includes a first locked part. The mating part 110 drives the control ring 500 to move from the distal end to the proximal end. The control ring 500 actuates the wall of the receiving tube 400 to deform or displace radially inward, causing the first locking part to deform or displace radially inward and limit the first locked part, thus locking the clamping arm 100 with the receiving tube 400. After the first locking part limits the first locked part, the first locking part can at least restrict the first locked part from moving towards the distal end, that is, due to the presence of the first locking part and the first locked part, the clamping arm 100 cannot move towards the distal end. For more details on how the control ring 500 actuates the wall of the receiving tube 400 to deform or displace radially inward, please refer to the relevant description above in this specification.

[0103] For example, as shown in Figures 3 and 18, the width of the second groove 412 is smaller than the width of the third groove 413. Therefore, locking steps 414 are formed on both sides of the third groove 413 at the connection between the third groove 413 and the second groove 412. The first locking part may include the aforementioned locking steps 414 on both sides of the third groove 413, and the first locked part is the distal end face of the mating part 110. After the mating part 110 drives the control ring 500 to move from the distal end to the proximal end and cross the locking steps 414, the control ring 500 actuates the wall of the receiving tube 400 to deform or displace radially inward. The locking steps 414 on both sides move towards each other to restrict the distal end face of the mating part 110 from moving towards the distal end. That is, when the mating part 110 moves towards the distal end, the distal end face of the locking steps 414 will abut against the distal end face of the mating part, thereby restricting the mating part 110 from continuing to move towards the distal end, and the clamping arm 100 locks with the receiving tube 400. The distal end face can be the end face of the corresponding structure located at the distal end, and correspondingly, the proximal end face can be the end face of the corresponding structure located at the proximal end.

[0104] The aforementioned first locking part and first locked part can also be configured in other ways. For example, the first locking part can also be a clamping member on both sides provided in the second groove 412 or the third groove 413. When the mating part 110 drives the control ring 500 to move from the distal end to the proximal end to the position of the clamping member, the control ring 500 actuates the tube wall of the receiving tube 400 to deform or displace radially inward, and the clamping members on both sides move toward each other to clamp the mating part 110, thereby restricting the movement of the mating part 110 to the distal or proximal end. Correspondingly, the first locked part can be a clamped structure in the mating part 110.

[0105] In some embodiments, when the mating part 110 moves from the distal end to the proximal end until it just abuts against the control ring 500, at least a portion of the first locked part is located on the distal side of the first locking part. That is, when the mating part 110 begins to drive the control ring 500 from the distal end to the proximal end, at least a portion of the first locked part is located on the distal side of the first locking part, thus preventing accidental locking of the clamping arm 100. The aforementioned distal side refers to the side at the distal end of the corresponding structure. For example, the first locking part is the locking step 414, and the first locked part is the distal end face of the mating part 110. When the mating part 110 begins to drive the control ring 500 from the distal end to the proximal end, the distal end face of the mating part 110 may be located on the distal side of the locking step 414. When the operator moves the clamping arm 100 proximally and feels feedback resistance, the operator knows that the clamping arm 100 is about to lock with the receiving tube 400. Since at least a portion of the first locked part is located distal to the first locking part at this time, the operator can control the clamping arm 100 to move distally and adjust its state. This facilitates timely correction of the clamping arm 100's grip on the target object and improves hemostasis. If the operator determines that the clamping arm 100 can lock with the receiving tube 400, they can continue to move the clamping arm 100 proximally.

[0106] In some embodiments, when the clamping arm 100 is locked to the receiving tube 400, the first locked portion is located on the proximal side of the first locking portion, thereby maintaining the lock between the clamping arm 100 and the receiving tube 400. The aforementioned proximal side refers to the side of the proximal end of the corresponding structure. For example, the first locking portion is a locking step 414, and the first locked portion is the distal end face of the mating portion 110. When the clamping arm 100 is locked to the receiving tube 400, the distal end face of the mating portion 110 is located on the proximal side of the locking step 414.

[0107] In some embodiments, the actuating part and the triggering part are configured to satisfy a first locking condition. The first locking condition is that when the first locked part passes the first locking part by a first preset distance, the actuating part drives the wall of the receiving tube 400 to deform or displace radially inward until the first locking part can limit the first locked part. The first preset distance is less than or equal to the axial distance between the abutting part 520 and the first locking part. For example, as shown in Embodiment 2 in FIG14 later in this specification, the first locking part includes the aforementioned locking steps 414 disposed on both sides of the third groove 413, and the first locked part is the distal end face of the mating part 110. When the distal end face of the mating part 110 passes the locking steps 414 by a first preset distance, the actuating part drives the wall of the receiving tube 400 to deform or displace radially inward until the locking steps 414 can limit the distal end face of the mating part 110. Understandably, when the clamping arm 100 locks with the receiving tube 400, that is, when the mating part 110 moves towards the proximal end to a first preset distance past the locking step 414 and stops moving towards the proximal end, without the action of other external forces (e.g., the traction force applied by the control unit 300), the distal end of the clamping arm 100 will be driven to move towards the distal end due to the restoring deformation force (i.e., elastic force). The mating part 110 can abut against the locking step 414, which restricts the mating part 110 from continuing to move towards the distal end. The mating part 110 is located between the locking step 414 and the abutment part 520 of the control ring 500. Since the distal end face of the mating part 110 is within the first preset distance after passing the locking step 414, the actuating part and the triggering part abut against each other, causing the tube wall of the receiving tube 400 to deform or displace radially inward until the locking step 414 can limit the distal end face of the mating part 110. Therefore, when the locking step 414 needs to unlock the distal surface of the mating part 110, the axial distance between the abutment part 520 of the control ring 500 and the locking step 414 needs to be less than or equal to the aforementioned first preset distance. However, since the mating part 110 is located between the locking step 414 and the abutment part 520 at this time, the axial distance between the abutment part 520 and the locking step 414 cannot be less than or equal to the aforementioned first preset distance, thus causing the locking step 414 to be unable to release the restriction on the distal surface of the mating part 110. Therefore, when the actuating part and the triggering part are configured to meet the first locking condition, after the clamping arm 100 and the storage tube 400 are locked, even if the control ring 500 moves toward the distal end (for example, moves to the point where the abutment part 520 abuts against the mating part 110), the restriction on the first locked part by the first locking part will not be released, thus realizing the "self-locking" between the storage tube 400, the clamping arm 100, and the control ring 500, ensuring the stability of the locking between the clamping arm 100 and the storage tube 400. For ease of description, the locking method shown in the foregoing embodiments of this specification may be referred to as the first locking method.

[0108] In some embodiments, the actuating part and the triggering part are configured to satisfy a second locking condition. The second locking condition is that the actuating part can only drive the wall of the receiving tube 400 to deform or displace radially inward after the first locked part has passed a second preset distance from the first locking part, so that the first locking part can limit the first locked part. The aforementioned second preset distance is greater than the axial distance between the abutting part 520 and the first locking part. For example, as shown in Embodiment Six in FIG. 24 and Embodiment Seven in FIG. 25, the first locking part includes the aforementioned locking steps 414 (not shown in FIG. 24 and FIG. 25) disposed on both sides of the third groove 413, and the first locked part is the distal end face of the mating part 110. The actuating part can only drive the wall of the receiving tube 400 to deform or displace radially inward after the distal end face of the mating part 110 has passed the second preset distance from the locking steps 414, so that the locking steps 414 can limit the distal end face of the mating part 110. After the clamping arm 100 is locked to the receiving tube 400, if the control ring 500 moves towards the distal end until the axial distance between the abutment portion 520 and the locking step 414 is less than the second preset distance, the locking step 414 will release its restriction on the distal end face of the mating portion 110, allowing the clamping arm 100 to move towards the distal end and the clamping arm 100 to be unlocked from the receiving tube 400. Therefore, when the actuating part and the triggering part are configured to meet the second locking condition, after the clamping arm 100 is locked to the receiving tube 400, if the control ring 500 moves towards the distal end, it can also release the restriction of the first locking part on the first locked part, facilitating the unlocking of the clamping arm 100 and enabling free disassembly. For ease of description, the locking method shown in the foregoing embodiments of this specification can be referred to as the second locking method. In the second locking method, to ensure the stability of the locking between the clamping arm 100 and the receiving tube 400, the position of the control ring 500 relative to the receiving tube 400 can be restricted to avoid mis-locking of the clamping arm 100. For more information on restricting the position of the control ring 500 relative to the receiving tube 400, please refer to the relevant description below in this manual.

[0109] Locking the clamping arm 100 to the receiving tube 400 may also include preventing the clamping arm 100 from moving proximally within the receiving tube 400. In some embodiments, the control ring 500 includes a second locking portion, and the mating portion 110 includes a second locked portion. After the position of the control ring 500 is restricted, the second locking portion can restrict the second locked portion from moving proximally, thereby restricting the clamping arm 100 from moving proximally. After the second locking portion limits the second locked portion, the aforementioned second locking portion can at least restrict the second locked portion from moving proximally, that is, due to the presence of the second locking portion and the second locked portion, the clamping arm 100 cannot move proximally. The aforementioned second locking portion may be a structure in the control ring 500 that abuts against the mating portion 110, i.e., abutting portion 520 (e.g., the distal surface of the control ring 500). The second locked portion may be a structure in the mating portion 110 that abuts against the control ring 500 (e.g., the proximal surface of the mating portion 110). Since the second locking part abuts against the second locked part and the second locking part is located on the proximal side of the second locked part, when the position of the control ring 500 is restricted (i.e., the control ring 500 cannot continue to move towards the proximal end), the second locking part will restrict the second locked part from continuing to move towards the proximal end, and correspondingly, the clamping arm 100 cannot move towards the proximal end.

[0110] The position of the control ring 500 can be restricted in one or more of the following ways. For example, the mating part 110 can move the control ring 500 from the distal end to the proximal end until the proximal end of the control ring 500 abuts against the distal end of the sheath 210, thereby restricting further proximal movement of the control ring 500 and thus restricting the position of the control ring 500. As another example, one of the control ring 500 and the receiving tube 400 includes a spring 540, and the other includes a second limiting recess 450. The mating part 110 moves the control ring 500 from the distal end to the proximal end, causing the spring 540 to engage with the second limiting recess 450, thereby restricting the position of the control ring 500 relative to the receiving tube 400 and thus restricting further proximal movement of the control ring 500. Further explanation of the engagement of the spring 540 and the second limiting recess 450 can be found in the relevant description below.

[0111] In some embodiments, the movement of the clamping arm 100 toward the proximal end can also be restricted in other ways. For example, as shown in FIG6, the stop portion 150 forms a limit with the distal end of the receiving tube 400, restricting the movement of the clamping arm 100 toward the proximal end. For example, the width of the distal joint portion 121 in the clamping portion 120 is greater than the width of the curved portion 122, and the stop portion 150 is formed at the connection between the two. When the control ring 500 actuates the trigger protrusion 430, the stop portion 150 abuts against the distal end face of the receiving tube 400, and the receiving tube 400 restricts the movement of the clamping portion 120 toward the proximal end.

[0112] In some embodiments, after the clamping arm 100 is locked to the receiving tube 400, the lock can be released. Specifically, after the clamping arm 100 is locked to the receiving tube 400, if the operator finds that the clamping arm 100 is not properly positioned to hold the target object or has not effectively closed the wound, the clamping arm 100 can be unlocked using the external unlocking tool 20, allowing for free disassembly. This facilitates subsequent operations, timely correction of surgical errors, and improves the success rate of the surgery. The external unlocking tool can act on the clamping arm 100 to release its lock. For example, the external unlocking tool 20 includes, but is not limited to, snares, clamps, etc.

[0113] In some embodiments, the mating part 110 has a tool contact surface 112. The tool contact surface 112 can be a surface area for contacting an external tool, capable of directly bearing and responding to external forces. By providing the tool contact surface 112, the external tool engages with the mating part 110 of the elastic cantilever 130, facilitating the use of an external tool to perform operations (such as assembly or unlocking) on ​​the elastic cantilever 130, solving the problems of assembly errors and low efficiency caused by manual operation, and improving assembly accuracy and production efficiency. As shown in FIG19, after the clamping arm 100 is locked with the receiving tube 400, the external unlocking tool 20 can apply a radially inward force to the tool contact surface 112. Under the action of the radially inward force, the tool contact surface 112 can deform the proximal end of the elastic cantilever 130 radially inward to allow it to enter the channel of the receiving tube 400, thereby unlocking the clamping arm 100 from the receiving tube 400 and restoring the elastic cantilever 130 to its free state. For example, the tool contact surface 112 can cause the proximal end of the elastic cantilever 130 to deform radially inward at the third groove 413 under the action of a radially inward force, allowing it to enter the channel of the receiving tube 400.

[0114] After the clamping arm 100 is unlocked from the storage tube 400, under the elastic action of the bent portion 122 of the clamping portion 120, the clamping portion 120 moves to the distal end and extends out of the storage tube 400, and the clamping portion 120 reopens. By designing the tool contact surface 112, it is easier to contact and cooperate with the external unlocking tool 20, reducing the difficulty of disassembly and improving the disassembly efficiency.

[0115] It is worth noting that the descriptions of unlocking the clamp arm 100 by the external unlocking tool 20 shown in the foregoing embodiments of this specification can be applied to the clamp device 10 set by the first locking method or the clamp device 10 set by the second locking method.

[0116] In some embodiments, the clamping arm 100 can also be unlocked in other ways. In some embodiments, the receiving tube 400 includes a second limiting recess 450, and the control ring 500 includes a spring piece 540. When the clamping arm 100 is locked to the receiving tube 400, the spring piece 540 engages with the second limiting recess 450. The spring piece 540 is configured to deform to release its engagement with the second limiting recess 450. After the engagement between the spring piece 540 and the second limiting recess 450 is released, the control ring 500 moves axially, the clamping arm 100 is unlocked from the receiving tube 400, and the elastic cantilever 130 returns to its free state. Based on the aforementioned unlocking method, the clamping arm 100 can be unlocked by manipulating the control ring 500, avoiding the deformation of the clamping arm 100 caused by directly unlocking it, which would affect the clamping effect of the clamping device 100. For further explanation of the aforementioned unlocking method, please refer to the relevant descriptions of Embodiments Six and Seven below in this specification.

[0117] As shown in Figures 8 and 9, Embodiment 2 of this specification provides another clamping device 10. The clamping device 10 in Embodiment 2 is a modification of the clamping device 10 in Embodiment 1. Compared with the clamping device 10 in Embodiment 1, the difference in the clamping device 10 in Embodiment 2 includes the different structure of the receiving tube 400.

[0118] In Embodiment 2, the axial length of the control ring 500 is greater than the length of the long groove 410, and the clearance groove 530 is constructed as an intermediate groove extending axially along the control ring 500. The mating part 110 moves axially along the clearance groove 530 throughout the entire movement. In some embodiments, the width of the clearance groove 530 is greater than the width of the long groove 410 to prevent the clearance groove 530 from interfering with the movement of the mating part 110. In this way, the control ring 500 is designed to be longer, which can wrap most of the receiving tube 400, improving structural strength, and the mating part 110 is always located within the clearance groove 530, which can improve the overall control accuracy.

[0119] As shown in Figures 10 to 14, Embodiment 3 of this specification also provides another clamp device 10. The clamp device 10 shown in Embodiment 3 is a modification of the clamp device 10 in Embodiment 2. Compared with the clamp device 10 in Embodiment 2, the differences in the clamp device 10 in Embodiment 3 include the partial configuration of the storage tube 400 and the control ring 500.

[0120] In some embodiments, one of the control ring 500 and the receiving tube 400 includes a spring piece 540, and the other includes a first limiting recess 440. When the control ring 500 is in its initial position, the spring piece 540 engages with the first limiting recess 440. In some embodiments, one end of the spring piece 540 is connected to one of the control ring 500 and the receiving tube 400, and the other end extends toward the other of the control ring 500 and the receiving tube 400. The first limiting recess 440 includes, but is not limited to, a through hole or a countersunk hole. In some embodiments, the spring piece 540 or the first limiting recess 440 may be located at the distal end of the control ring 500, at the middle of the control ring 500, or at the proximal end of the control ring 500. In the third embodiment, a spring piece 540 is provided at the distal end of the control ring 500, and a first limiting recess 440 is provided at the distal end of the receiving tube 400. When the control ring 500 is in the initial position, the spring piece 540 at the distal end of the control ring 500 engages with the first limiting recess 440 at the distal end of the receiving tube 400. By providing the spring piece 540 and the first limiting recess 440, the connection stability between the control ring 500 and the receiving tube 400 can be improved before the clamping arm 100 and the receiving tube 400 are locked, preventing relative displacement between the two and preventing accidental locking or release during the opening and closing of the clamping arm 100.

[0121] In some embodiments, the spring 540 is configured to control the force required to move the control ring 500 proximally within a preset force range. For example, the preset force range includes 30N to 140N. Preferably, the preset force ranges from 30N to 80N. By configuring the spring 540 and the first limiting recess 440 to cooperate, the resistance to the movement of the control ring 500 driven by the clamping arm 100 can be increased, preventing accidental locking or release during the opening and closing of the clamping arm 100.

[0122] In some embodiments, one of the control ring 500 and the receiving tube 400 includes a spring piece 540, and the other includes a second limiting recess 450. When the control ring 500 is in the triggered position, the spring piece 540 engages with the second limiting recess 450. The spring piece 540 is configured to limit the axial relative movement between the control ring 500 and the receiving tube 400, thereby limiting the position of the control ring 500 relative to the receiving tube 400. The aforementioned second limiting recess 450 may be located near the proximal end of the first limiting recess 440, and the line connecting the first limiting recess 440 and the second limiting recess 450 may be parallel to the axial direction. In a third embodiment, the second limiting recess 450 is disposed in the receiving tube 400 and located near the proximal end of the first limiting recess 440 along the axial direction. The spring piece 540 has elastic deformation capability, allowing the spring piece 540 to move from the first limiting recess 440 into the second limiting recess 450. By setting the spring piece 540 and the second limiting recess 450, the connection stability between the control ring 500 and the storage tube 400 can be improved after the clamping arm 100 is locked to the storage tube 400, thus improving the locking stability.

[0123] In some embodiments, the distance between the first limiting recess 440 and the second limiting recess 450 is equal to the distance of movement of the control ring 500. That is, by adjusting the distance between the first limiting recess 440 and the second limiting recess 450, the distance of movement of the control ring 500 can be adjusted to a suitable range.

[0124] It should be noted that in embodiments where the spring 540, the first limiting recess 440, and the second limiting recess 450 are not provided in this specification, the axial movement between the control ring 500 and the receiving tube 400 can also be limited by the frictional force between them.

[0125] In addition, when the clamping device 10 is set using the first locking method or the second locking method, the clamping device 10 can be provided with structures such as spring piece 540, first limiting recess 440, and second limiting recess 450 to improve the connection stability between the control ring 500 and the storage tube 400, as well as the locking stability between the clamping arm 100 and the storage tube 400.

[0126] As shown in Figures 15-19, Embodiment 4 of this specification also provides another clamp device 10, which is a modification of the clamp device 10 in Embodiment 1. Compared with the clamp device 10 in Embodiment 1, the differences in the clamp device 10 shown in Embodiment 4 include different arrangements of the clamp arm 100, the storage tube 400, and the control ring 500. In addition, the clamp device 10 shown in Embodiment 4 also includes an outer tube 600, which serves to protect the storage tube 400 and the control ring 500.

[0127] In Embodiment 4, the connecting buckle 140 in the clamping arm 100 is not composed of the elastic cantilever 130, but rather of at least two buckle tabs 141. One side of the buckle tab 141 is fixed to the proximal joint 123, and the other side extends radially inward, forming a through hole between the at least two buckle tabs 141 to engage the connecting end 221. When the buckle tab 141 deforms or displaces under force, it engages or disengages from the limiting groove 223 of the connecting end 221. It is understood that although the structure of the connecting buckle 140 in the clamping arm 100 has changed, the releasable connection method between the connecting buckle 140 and the connecting end 221 in Embodiment 4 is similar to that in Embodiment 1, and therefore will not be described again here. However, it is worth noting that since the connecting buckle 140 in Embodiment 4 is formed by a fastener 141 fixed to the proximal joint portion 123, the releasable connection between the connecting buckle 140 and the connecting end 221 in Embodiment 4 will not cause deformation of the elastic cantilever 130 in Embodiment 4. Therefore, the first groove portion 411 in the elongated groove 410 shown in Embodiment 4 does not need to be configured to allow the mating portion 110 to move radially outward within the first groove portion 411. Furthermore, the shape of the elastic cantilever 130 shown in Embodiment 4 is different from that of the elastic cantilever 130 shown in Embodiment 1. The mating portion 110 in the elastic cantilever 130 is constructed as a bent structure, and at least a portion of the bent structure constitutes a tool contact surface 112, which is arranged radially outward. For example, the mating portion 110 is formed by directly bending the elastic cantilever 130 outward, which is easy to process. For example, at least a portion of the outer surface of the bent structure constitutes a plane with a predetermined area, which facilitates contact and engagement by the external unlocking tool 20. The terms "inner" and "outer" of the elastic cantilever 130 are based on the central axis of the clamping arm 100. The side facing the central axis of the clamping arm 100 is called "inner", and the side away from the central axis of the clamping arm 100 is called "outer".

[0128] In Embodiment 4, the outer tube 600 and the receiving tube 400 are fixedly connected by welding, bonding, or integral molding. Correspondingly, when assembling the clamping device 10, the outer tube 600 and the receiving tube 400 can be assembled first, and then the proximal end of the clamping arm 100 can be inserted into the receiving tube 400 to form a first assembly component. The wall of the receiving tube 400 is provided with a first positioning hole 470, which includes, but is not limited to, a circular hole or a polygonal hole. The wall of the outer tube 600 is provided with a second positioning hole 610, and the first positioning hole 470 and the second positioning hole 610 have the same shape and size. When the first positioning hole 470 and the second positioning hole 610 can be connected to an external positioning shaft, the outer tube 600 can be fitted into a preset position on the receiving tube 400 to improve the assembly accuracy of the outer tube 600 and the receiving tube 400. The preset positions include the relative positions of the receiving tube 400 and the outer tube 600 in the axial and circumferential directions. These relative positions can be determined based on the correspondence between the structures on the receiving tube 400 and the outer tube 600. The outer tube 600 may also include a disassembly groove 610. When the outer tube 600 is connected to the receiving tube 400, the position of the disassembly groove 610 can correspond to the position of the third groove 413 to avoid the third groove 413. The width of the disassembly groove 610 can be no less than the width of the third groove 413. For example, when the clamping arm 100 is locked to the receiving tube 400, the mating part 110 engages with the third groove 413, and the tool contact surface 112 can be exposed from the disassembly groove 610 so that the external unlocking tool 20 can contact the mating part 110 to unlock the clamping arm 100.

[0129] In Embodiment 4, the stop plate 460 can be located at the far end of the outer tube 600 instead of the far end of the receiving tube 400, but the other settings and related functions of the stop plate 460 are the same as those of the stop plate 460 shown in Embodiment 1, so they will not be described again here.

[0130] In Embodiment 4, both the trigger protrusion 430 and the protrusion 421 are disposed in the second diameter section, and the protrusion 421 is located near the proximal end of the trigger protrusion 430. Thus, the trigger protrusion 430 and the protrusion 421 can form a connecting groove that mates with the connecting protrusion. For more information regarding the connecting protrusion and the connecting groove, please refer to the relevant description in Embodiment 1 of this specification.

[0131] As shown in Figure 18, in the initial position, the control ring 500 can be fitted onto the second diameter section of the receiving tube 400 and is located at the distal end of the trigger protrusion 430. In Embodiment 4, the control ring 500 is not provided with a clearance hole 510 or a clearance groove 530.

[0132] It is worth noting that although some structures of the clamp device 10 in the aforementioned embodiment four are different from those in the clamp device 10 in embodiment one, the releasable connection between the clamp arm 100 and the spindle 220, the releasable connection between the storage tube 400 and the sheath tube 210, and the locking and unlocking of the clamp arm 100 in embodiment four are similar to the corresponding settings of the clamp device 10 in embodiment one, so they will not be described again here.

[0133] As shown in Figures 20-23, Embodiment 5 of this specification also provides another clamp device 10, which is a modification of the clamp device 10 in Embodiment 3. Compared with the clamp device 10 in Embodiment 3, the clamp device 10 in Embodiment 4 differs in the arrangement of the control ring 500, clamp arm 100, and storage tube 400.

[0134] In Embodiment 5, as shown in FIG22, the clearance groove 530 of the control ring 500 includes a first clearance groove 531 and a second clearance groove 532. The first clearance groove 531 is located at a position corresponding to the first groove portion 411, and the second clearance groove 532 is located at a position corresponding to the third groove portion 413. The width of the first clearance groove 531 is configured to allow the mating part 110 to move radially outward within the first clearance groove 531, ensuring that the mating part 110 can move radially outward within the first groove portion 411 to achieve the assembly of the mandrel 220 and the clamping arm 100. The width of the second clearance groove 532 is configured to allow the mating part 110 to move radially outward within the second clearance groove 532, ensuring that the mating part 110 can move radially outward within the second groove portion 411 to release the mating of the mandrel 220 and the clamping arm 100, and facilitating sufficient depth for the external unlocking tool 20 to unlock the clamping arm 100. For example, the width of the first clearance groove 531 can be greater than the width of the first groove portion 411, and the width of the second clearance groove 532 can be greater than the width of the third groove portion 413. When the mating part 110 can move at other positions along the long groove 410 (e.g., the second groove portion 412), the mating part 110 is inside the control ring 500. It is worth noting that when the mating part 110 moves inside the control ring 500, it does not drive the control ring 500 to move.

[0135] In Embodiment 5, as shown in Figure 20, the connecting buckle 140 in the clamping arm 100 can be composed of a first limiting structure 142 and a second limiting structure 143. Specifically, the middle part of the elastic cantilever 130 is constructed as a radially inward bending structure, which is configured as the first limiting structure 142. When the first limiting structure 142 is deformed or displaced under force, it engages or disengages from the limiting groove 223 of the connecting end 221. For example, when the connecting end 221 and the clamping arm 100 approach each other, the connector 222 presses against the first limiting structure 142, causing the elastic cantilever 130 to elastically deform radially outward. The space between at least two elastic cantilever 130 increases to allow the connector 222 to completely pass over the first limiting structure 142. Then, the elastic cantilever 130 returns to its original state, allowing the first limiting structure 142 to fit into the limiting groove 223, thus completing the connection between the connecting end 221 and the clamping arm 100. When the tension between the connecting end 221 and the clamping arm 100 reaches a certain value, the connector 222 causes the elastic cantilever 130 to undergo elastic deformation, thereby disengaging the first limiting structure 142 from the limiting groove 223 and releasing the connecting end 221 from the clamping arm 100.

[0136] For example, the second limiting structure 143 is configured to limit the lateral displacement of the connecting end 221, wherein the lateral displacement refers to the displacement in the direction perpendicular to the central axis of the clamp arm 100. For example, the second limiting structure 143 protrudes from the side of the elastic cantilever 130 toward the adjacent elastic cantilever 130, and is used to limit the connecting end 221 within the space between the first limiting structures 142. For example, one second limiting structure 143 is provided between each of the adjacent elastic cantilever 130, and the two limiting structures are arranged with a gap to avoid affecting the deformation performance of the elastic cantilever 130. For example, as shown in FIG20, the second limiting structure 143 is constructed as a protrusion, and the second limiting structure 143 protrudes axially from the proximal end of the proximal joint portion 123. When the connecting end 221 is engaged with the connecting buckle 140, the second limiting structure 143 limits the lateral displacement of the connecting end 221.

[0137] In Embodiment 5, as shown in FIG20, a stop protrusion 113 is formed on the mating portion 110 of the clamping arm 100. When the mating portion 110 mates with the second groove portion 412, the stop protrusion 113 slides in contact with the inner wall of the receiving tube 400 to limit the deformation of the bending structure of the elastic cantilever 130. By providing the stop protrusion 113, when the mating portion 110 mates with the second groove portion 412, the stop protrusion 113 can limit the radial outward deformation of the mating portion 110, preventing the clamping arm 100 and the connecting end 221 from accidentally falling off.

[0138] In Embodiment 5, as shown in FIG21, the first limiting recess 440 and the second limiting recess 450 in the receiving tube 400 are connected, and a stop arm 441 is formed between the first limiting recess 440 and the second limiting recess 450. For example, during the process of the spring piece 540 moving from the first limiting recess 440 into the second limiting recess 450, the spring piece 540 causes the stop arm 441 to deform, thereby widening the channel between the first limiting recess 440 and the second limiting recess 450, allowing the spring piece 540 to move from the first limiting recess 440 into the second limiting recess 450. Based on this, the driving force required for the mating part 110 to drive the control ring 500 to move proximally is determined based on the length of the stop arm 441. By adjusting the length of the stop arm 441, the driving force can be adjusted to a suitable range, facilitating operation by the operator. For example, the length of the stop arm 441 is configured such that the driving force required to control the movement of the control ring 500 proximally is in the range of 30N to 80N.

[0139] As shown in Figure 24, Embodiment Six of this specification also provides another clamp device 10, which is a modification of the clamp device 10 in Embodiment Five. Compared with the clamp device 10 in Embodiment Five, the clamp device 10 in Embodiment Six differs in the partial arrangement of the receiving tube 400 and the control ring 500.

[0140] As shown in Figure 24, the spring 540 of the control ring 500 in Embodiment 6 includes a hook portion 541 (not shown in Figure 24, see Figure 25) and an extension portion 542. The proximal end of the extension portion 542 is fixed to the control ring 500, and the hook portion 541 is located at the distal end of the extension portion 542. When the clamping arm 100 is locked with the receiving tube 400, the hook portion 541 engages with the second limiting recess 450. For example, the hook portion 541 abuts against the distal end of the second limiting recess 450, so that the trigger protrusion 430 on the receiving tube 400 remains in contact with the inner wall surface of the control ring 500.

[0141] In Embodiment Six, the second limiting recess 450 can be lengthened in the axial direction to provide deformation space for the extension portion 542.

[0142] In Embodiment Six, the spring piece 540 is also used to receive an external unlocking tool. Under the action of the external unlocking tool, the extension 542 of the spring piece 540 deforms radially inward, and the receiving tube 400 and the control ring 500 are released from axial restriction. The external unlocking tool can also act on the control ring 500 to release the locking of the clamping arm 100.

[0143] For example, the external unlocking tool applies a radially inward force F1 to the distal end of the extension 542, the direction of which can be shown by the arrow in Figure 24. Under the action of force F1, the extension 542 bends inward, causing the hook 541 to disengage from the distal end of the second limiting recess 450. After the hook 541 disengages from the distal end of the second limiting recess 450, under the elastic force of the tube wall after deformation or displacement of the receiving tube 400 and / or the elastic force of the distal end of the clamping arm 100, the receiving tube 400 actuates the control ring 500 to move distally through the trigger part (e.g., trigger protrusion 430). The clamping device 10 shown in Embodiment 6 can be set using the second locking method described above in this specification. Therefore, after the control ring 500 moves axially toward the distal end, the first locking part (e.g., the limiting step 414) releases the restriction on the first locked part, the clamping arm 100 can move toward the distal end, the clamping arm 100 is unlocked from the storage tube 400, and the elastic cantilever 130 returns to its free state.

[0144] As shown in Figure 25, Embodiment 7 of this specification also provides another clamp device 10, which is a modification of the clamp device 10 in Embodiment 6. Compared with the clamp device 10 in Embodiment 6, the clamp device 10 in Embodiment 7 differs in the partial arrangement of the receiving tube 400.

[0145] In Embodiment Seven, the external unlocking tool applies a radially inward force F2 to the distal end of the extension 542, the direction of which can be shown by the arrow in Figure 25. Under the action of force F2, the extension 542 bends outward, disengaging the hook 541 from the second limiting recess 450. After the hook 541 disengages from the distal end of the second limiting recess 450, the receiving tube 400 actuates the control ring 500 to move distally via a trigger (e.g., trigger protrusion 430). The clamping device 10 shown in Embodiment Seven can be configured using the second locking method described above. Therefore, after the control ring 500 moves axially distally, the first locking part releases its restriction on the first locked part, allowing the clamping arm 100 to move distally, unlocking the clamping arm 100 from the receiving tube 400, and restoring the elastic cantilever 130 to its free state.

[0146] It is worth noting that in Embodiments 6 and 7, the tool contact surface 112 of the clamping arm 100 can also be acted upon by the external unlocking tool 20 to unlock the clamping arm 100 from the storage tube 400.

[0147] One embodiment of this specification (also known as embodiment eight) also provides a clamp device, in which the clamp device includes: a clamping arm; a receiving tube, the proximal end of the clamping arm being received in the receiving tube; a sheath, the proximal end of the receiving tube being releasably connected to the distal end of the sheath; and a control ring, which is axially movable and slidably engaged with the receiving tube, and is configured to actuate the receiving tube and the sheath to release when the control ring moves from the distal end to the proximal end.

[0148] Furthermore, in this embodiment eight, a first connecting part is provided on the outer wall surface of the receiving tube, and a second connecting part is provided on the inner wall surface of the sheath tube. The first connecting part and the second connecting part are releasably connected. A control ring is sleeved on the receiving tube and is configured to move from the distal end to the proximal end, so as to cause the tube wall of the receiving tube to deform or displace radially inward, thereby driving the first connecting part to move radially inward until it is disengaged from the second connecting part.

[0149] Furthermore, in this eighth embodiment, one of the first connecting portion and the second connecting portion includes a connecting protrusion, and the other includes a connecting groove, wherein the connecting protrusion is releasably engaged in the connecting groove.

[0150] Furthermore, in this embodiment eight, the wall of the receiving tube is provided with at least one long groove extending axially, and the proximal end of the clamping arm is provided with a mating part, which moves along the long groove to switch the clamping arm between an open state and a closed state.

[0151] Furthermore, in this embodiment eight, the control ring is movably sleeved on the outside of the long groove of the receiving tube, with at least a portion of the mating part extending out of the long groove, so that the mating part can move along the long groove from the far end to the near end until it abuts against the control ring, and drive the control ring to move from the far end to the near end.

[0152] Furthermore, in this embodiment eight, a trigger part is provided on the outer wall surface of the receiving tube, and an actuating part is provided on the inner wall surface of the control ring. The maximum radial distance between the trigger part and the central axis of the receiving tube is greater than the radial distance between the innermost edge of the actuating part and the central axis of the receiving tube. The control ring includes a trigger position: in the trigger position, the trigger part abuts against the actuating part, causing the tube wall of the receiving tube to deform or displace radially inward.

[0153] Furthermore, in this embodiment eight, the triggering part includes a triggering protrusion disposed on the outer wall surface of the receiving tube, and the actuating part includes the inner wall surface of the control ring. The radial distance between the outermost edge of the triggering protrusion and the central axis of the receiving tube is greater than the inner radius of the control ring. The control ring also includes an initial position: in the initial position, the outer wall surface of the receiving tube abuts against the inner wall surface of the control ring; in the triggering position, the outer wall surface of the triggering protrusion abuts against the inner wall surface of the control ring, causing the wall of the receiving tube to deform or displace radially inward.

[0154] Furthermore, in this embodiment eight, the distal end of the trigger protrusion is provided with a slope, and the radial distance between the outermost edge of the slope and the central axis of the receiving tube gradually increases from the distal end to the proximal end.

[0155] Furthermore, in this embodiment eight, the control ring is provided with a clearance hole. In the initial position, the trigger protrusion is located in the clearance hole. When the control ring moves from the far end to the near end, it drives the clearance hole to move from the far end to the near end. The trigger protrusion abuts against the inner wall surface of the control ring, causing the tube wall of the receiving tube to deform or displace radially inward.

[0156] The aforementioned structure in Embodiment 8 can be found in the descriptions of the corresponding structures in Embodiments 1 to 7. It is worth noting that Embodiment 8 may include only the aforementioned structure, or it may further include other structures from Embodiments 1 to 7.

[0157] One embodiment of this specification (also known as Embodiment Nine) also provides a clamping device. In Embodiment Nine, the clamping device includes: a clamping arm, at least two elastic cantilever arms disposed at the proximal end, the proximal ends of the at least two elastic cantilever arms surrounding each other to form a connecting buckle; a receiving tube, including at least one elongated groove extending axially; a mandrel, the mandrel including a connecting end, the connecting end being disposed at the distal end of the mandrel; wherein, the proximal end of at least one elastic cantilever arm includes a mating portion, at least a portion of the elongated groove constitutes a first groove portion, when the mating portion mates with the first groove portion, the connecting buckle is assembled with the connecting end by radial deformation or displacement.

[0158] Furthermore, in this ninth embodiment, the first groove is located at the far end of the long groove, and the width of the first groove is configured to allow the mating part to move radially outward within the first groove.

[0159] Furthermore, in this embodiment nine, the long groove also comprises a second groove portion and a third groove portion. The second groove portion is disposed near the proximal end of the first groove portion, and the third groove portion is disposed near the proximal end of the second groove portion. At least a portion of the width of the second groove portion is configured to restrict the mating portion from moving radially outward within the second groove portion, and the width of the third groove portion is configured to allow the mating portion to move radially outward within the third groove portion.

[0160] Furthermore, in this embodiment nine, the mating part is located in the third groove. When the spindle moves from the far end to the near end, the connecting end actuates the elastic cantilever to deform or displace radially outward in the third groove, and the connecting end is released from the connecting buckle.

[0161] Furthermore, in this embodiment nine, the distal end of the connecting end includes a connector, the radial dimension of the distal end of the connector gradually increases from the distal end to the proximal end, and the proximal end of the connecting end includes a limiting groove; the assembly process of the connecting end and the connecting buckle includes: the connector moves from the proximal end to the distal end, causing the elastic cantilever to deform or displace radially outward in the first groove, and after the connector passes through the connecting buckle, the elastic cantilever, which deforms or displaces radially outward in the first groove, deforms or displaces radially inward in the first groove, so that the connecting buckle is sleeved on the limiting groove.

[0162] Furthermore, in this embodiment nine, the clamp device also includes a sheath tube. A first connecting part is provided on the outer wall surface of the receiving tube, and a second connecting part is provided on the inner wall surface of the sheath tube. The first connecting part is connected to the second connecting part by radial deformation or displacement to achieve the internal connection between the first assembly component and the second assembly component, thereby realizing the assembly of the clamp device.

[0163] Furthermore, in this embodiment nine, the clamp device also includes a control ring that is axially movable and slidably engaged with the receiving tube. The control ring is configured to actuate the release of the receiving tube and sheath when it moves from the distal end to the proximal end.

[0164] The aforementioned structure in Embodiment Nine can be found in the descriptions of the corresponding structures in Embodiments One through Seven. It is worth noting that Embodiment Nine may include only the aforementioned structure, or it may further include other structures from Embodiments One through Seven.

[0165] One embodiment of this specification (also known as embodiment ten) also provides a clamping device, in which the clamping device includes a clamping arm; a receiving tube, the proximal end of the clamping arm being received in the receiving tube; and a control ring, which is axially movable and slidably engaged with the receiving tube, and is configured to actuate the clamping arm and the receiving tube to lock when the control ring moves axially.

[0166] Furthermore, in this embodiment ten, the wall of the receiving tube is provided with at least one elongated groove extending along the axial direction, and a first locking part is provided in the elongated groove. A mating part is provided at the proximal end of the clamping arm, and the mating part is movably mated with the elongated groove. The mating part includes a first locked part. The mating part drives the control ring to move from the distal end to the proximal end. The control ring actuates the wall of the receiving tube to deform or displace radially inward, which drives the first locking part to deform or displace radially inward and limits the first locked part, thus locking the clamping arm with the receiving tube.

[0167] Furthermore, in this tenth embodiment, when the mating part moves from the distal end to the proximal end until it just abuts against the control ring, at least a portion of the locked part is located on the distal end side of the first locking part; when the clamping arm locks with the storage tube, the locked part is located on the proximal end side of the first locking part.

[0168] Furthermore, in this embodiment ten, the long groove is composed of a second groove portion and a third groove portion. The third groove portion is disposed at the proximal end of the second groove portion, and the first locking portion is disposed at the third groove portion. The first locking portion includes locking steps disposed on both sides of the third groove portion. The first locked portion is the distal end face of the mating portion. After the mating portion drives the control ring to move from the distal end to the proximal end and cross the locking steps, the control ring actuates the tube wall of the receiving tube to deform or displace radially inward. The locking steps on both sides move toward each other to restrict the movement of the first locked portion toward the distal end, and the clamping arm locks with the receiving tube.

[0169] Furthermore, in this embodiment ten, after the first locking part limits the locked part, the movement of the actuation control ring toward the proximal end is restricted. The control ring includes a second locking part, and the mating part includes a second locked part. After the position of the control ring is restricted, the second locking part restricts the movement of the second locked part toward the proximal end.

[0170] Furthermore, in this tenth embodiment, one of the control ring and the receiving tube includes a spring piece, and the other includes a second limiting recess. The mating part drives the control ring to move from the distal end to the proximal end, so that the spring piece engages with the second limiting recess to limit the position of the control ring relative to the receiving tube.

[0171] Furthermore, in this tenth embodiment, the clamp device includes a sheath, and the mating part drives the control ring to move from the distal end to the proximal end until the proximal end of the control ring abuts against the distal end of the sheath, thereby restricting the control ring from continuing to move proximal.

[0172] Furthermore, in this embodiment ten, a trigger part is provided on the outer wall surface of the receiving tube, and an actuating part is provided on the inner wall surface of the control ring. The radial distance between the outermost edge of the trigger part and the central axis of the receiving tube is greater than the radial distance between the innermost edge of the actuating part and the central axis of the receiving tube. The control ring includes a trigger position: in the trigger position, the trigger part abuts against the actuating part, causing the tube wall of the receiving tube to deform or displace radially inward, and the actuating clamp arm locks with the receiving tube.

[0173] Furthermore, in this embodiment ten, the proximal end of the clamping arm includes an elastic cantilever, on which a mating part is provided, and the mating part has a tool contact surface; after the clamping arm is locked with the storage tube, the tool contact surface can deform the proximal end of the elastic cantilever in the radial direction under the action of a radially inward force to allow it to enter the channel of the storage tube, so that the clamping arm and the storage tube are unlocked and the elastic cantilever returns to its free state.

[0174] Furthermore, in this embodiment ten, the receiving tube includes a second limiting recess, and the control ring includes a spring piece. When the clamping arm is locked with the receiving tube, the spring piece engages with the second limiting recess. The spring piece is configured to deform to release the engagement with the second limiting recess. After the engagement between the spring piece and the second limiting recess is released, the control ring moves axially, the clamping arm is unlocked from the receiving tube, and the elastic cantilever returns to its free state.

[0175] The aforementioned structure in Embodiment 10 can be found in the descriptions of the corresponding structures in Embodiments 1 to 7. It is worth noting that Embodiment 10 may include only the aforementioned structure, or it may further include other structures from Embodiments 1 to 7.

[0176] It is worth noting that, without contradiction, one or more features, structures or characteristics among the foregoing embodiments of this specification (e.g., Embodiment 1 to Embodiment 10) can be appropriately combined or referenced to form new embodiments.

[0177] Some embodiments of this specification also provide a method for assembling a clamping device. As shown in FIG26, process 1000 includes the following steps. Process 1000 can be executed by a control unit (e.g., control unit 300) in the clamping device. It should be noted that the structure involved in this assembly method can be referred to the clamping devices in embodiments one to ten above.

[0178] Step 1010: Control the proximal end of the clamping arm to extend into the receiving tube to form the first assembly component.

[0179] Step 1020: Control the mandrel to extend into the sheath to form the second assembly.

[0180] Step 1030: Control the connection between the storage tube and the sheath tube to form a limit, thereby realizing the connection between the storage tube and the sheath tube.

[0181] Step 1040: The connecting end in the control spindle is assembled into the connecting buckle in the clamping arm to realize the connection between the spindle and the clamping arm.

[0182] Based on the aforementioned setup, the connection between the storage tube and the sheath tube enables the external connection between the first assembly component and the second assembly component, while the connection between the spindle and the clamp arm enables the internal connection between the first assembly component and the second assembly component, thereby achieving the assembly of the clamp device.

[0183] Some embodiments of this specification also provide a method for releasing a clamping device. As shown in FIG27, process 2000 includes the following steps. Process 2000 can be executed by a control unit (e.g., control unit 300) in the clamping device. It should be noted that the structure involved in this assembly method can be referred to the clamping devices in embodiments one to ten above.

[0184] Step 2010: Control the clamping arm to move from the far end to the near end, triggering the storage tube to deform radially inward.

[0185] Step 2020: Control the mandrel to move to the proximal end and disconnect the mandrel from the clamp arm.

[0186] Step 2030: Control the sheath to move proximally and disconnect the storage tube from the sheath.

[0187] Based on the aforementioned setup, after disconnecting the receiving tube from the sheath, the external connection between the first and second assembly components is released; after disconnecting the mandrel from the clamp arm, the internal connection between the first and second assembly components is released, thereby releasing the clamp device. After the clamp device is released, the second assembly component can be withdrawn from the patient's body.

[0188] 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 of this specification. Furthermore, this specification uses specific terms to describe embodiments of this specification. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0189] 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.

[0190] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other deformations or displacements may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be consistent with the teachings of this specification, rather than as examples or limitations. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A clamping device, characterized in that, include: Arm clamp; A receiving tube, in which the proximal end of the clamping arm is received; The sheath, wherein the proximal end of the receiving tube is releasably connected to the distal end of the sheath; A control ring, which is axially movable and slidably engaged with the receiving tube, is configured to actuate the release of the receiving tube and the sheath when the control ring moves from the distal end to the proximal end.

2. The clamping device as described in claim 1, characterized in that, The outer wall of the receiving tube is provided with a first connecting part, and the inner wall of the sheath is provided with a second connecting part, and the first connecting part and the second connecting part are releasably connected. The control ring is sleeved on the receiving tube and is configured to move from the distal end to the proximal end, thereby causing the tube wall of the receiving tube to deform or displace radially inward, and driving the first connecting part to move radially inward until it is disengaged from the second connecting part.

3. The clamping device as described in claim 2, characterized in that, One of the first connecting portion and the second connecting portion includes a connecting protrusion, and the other includes a connecting groove, wherein the connecting protrusion is releasably engaged in the connecting groove.

4. The clamping device as described in claim 2, characterized in that, The wall of the receiving tube is provided with at least one elongated groove extending along the axial direction. The proximal end of the clamping arm is provided with a mating part, which moves along the long groove to switch the clamping arm between an open state and a closed state.

5. The clamping device as described in claim 4, characterized in that, The control ring is movably fitted onto the outside of the long groove of the receiving tube, with at least a portion of the mating part extending out of the long groove, so that the mating part can move along the long groove from the distal end to the proximal end until it abuts against the control ring, and drive the control ring to move from the distal end to the proximal end.

6. The clamping device as described in claim 1, characterized in that, The outer wall of the storage tube is provided with a trigger part, and the inner wall of the control ring is provided with an actuation part. The maximum radial distance of the trigger part relative to the central axis of the storage tube is greater than the radial distance of the innermost edge of the actuation part relative to the central axis of the storage tube. The control loop includes trigger positions: At the trigger position, the trigger part abuts against the actuating part, causing the wall of the receiving tube to deform or displace radially inward.

7. The clamping device as described in claim 6, characterized in that, The triggering part includes a triggering protrusion disposed on the outer wall surface of the receiving tube, and the actuating part includes the inner wall surface of the control ring. The radial distance between the outermost edge of the triggering protrusion and the central axis of the receiving tube is greater than the inner radius of the control ring. The control loop also includes an initial position: In the initial position, the outer wall surface of the receiving tube abuts against the inner wall surface of the control ring; At the trigger position, the outer wall surface of the trigger protrusion abuts against the inner wall surface of the control ring, causing the wall of the receiving tube to deform or displace radially inward.

8. The clamping device as described in claim 7, characterized in that, The distal end of the trigger protrusion is provided with an inclined surface, and the radial distance between the outermost edge of the inclined surface and the central axis of the receiving tube gradually increases from the distal end to the proximal end.

9. The clamping device as described in claim 7 or 8, characterized in that, The control ring is provided with clearance holes. In the initial position, the trigger protrusion is located in the clearance hole; When the control ring moves from the far end to the near end, it drives the clearance hole to move from the far end to the near end. The trigger protrusion abuts against the inner wall surface of the control ring, causing the tube wall of the receiving tube to deform or displace radially inward.

10. A clamping device, characterized in that, include: The clamping arm comprises at least two elastic cantilever arms located at the proximal end, the proximal ends of the at least two elastic cantilever arms forming a connecting buckle; A receiving tube, including at least one elongated groove extending axially; A mandrel, the mandrel including a connecting end disposed at the distal end of the mandrel; In this embodiment, at least one of the elastic cantilever proximal ends includes a mating portion, at least a portion of the long groove forms a first groove portion, and when the mating portion mates with the first groove portion, the connecting buckle is assembled with the connecting end by radial deformation or displacement.

11. The clamping device as described in claim 10, characterized in that, The first groove is located at the far end of the long groove, and the width of the first groove is configured to allow the mating part to move radially outward within the first groove.

12. The clamping device as described in claim 10, characterized in that, The elongated groove also comprises a second groove portion and a third groove portion, the second groove portion being disposed near the proximal end of the first groove portion, the third groove portion being disposed near the proximal end of the second groove portion, at least a portion of the width of the second groove portion being configured to restrict the mating portion from moving radially outward within the second groove portion, and the width of the third groove portion being configured to allow the mating portion to move radially outward within the third groove portion.

13. The clamping device as described in claim 12, characterized in that, The mating part is located in the third groove. When the spindle moves from the far end to the near end, the connecting end causes the elastic cantilever to deform or displace radially outward in the third groove, and the connecting end and the connecting buckle are disengaged.

14. The clamping device as described in claim 10, characterized in that, The distal end of the connecting end includes a connector, the radial dimension of the distal end of the connector gradually increases from the distal end to the proximal end, and the proximal end of the connecting end includes a limiting groove. The assembly process of the connecting end and the connecting buckle includes: the connector moves from the proximal end to the distal end, causing the elastic cantilever to deform or displace radially outward in the first groove; after the connector passes through the connecting buckle, the elastic cantilever, which deforms or displaces radially outward, deforms or displaces radially inward in the first groove, so that the connecting buckle is sleeved on the limiting groove.

15. The clamping device as described in claim 10, characterized in that, The clamp device also includes a sheath, with a first connecting part provided on the outer wall of the receiving tube and a second connecting part provided on the inner wall of the sheath. The first connecting part is assembled with the second connecting part by radial deformation or displacement.

16. The clamping device as described in claim 15, characterized in that, The clamp device also includes a control ring that is axially movable and slidably engaged with the receiving tube. The control ring is configured to actuate the release of the receiving tube and the sheath when it moves from the distal end to the proximal end.

17. A clamping device, characterized in that, include: Arm clamp; A receiving tube, in which the proximal end of the clamping arm is received; A control ring, which is axially movable and slidably engaged with the receiving tube, is configured to actuate the clamping arm and lock it to the receiving tube when the control ring moves along the axial direction.

18. The clamping device as described in claim 17, characterized in that, The wall of the receiving tube is provided with at least one elongated groove extending along the axial direction, and a first locking part is provided in the elongated groove. The clamping arm is provided with a mating part at its proximal end, the mating part being movably engaged with the long groove, the mating part including a first locking part; The mating part drives the control ring to move from the far end to the near end. The control ring causes the wall of the receiving tube to deform or displace radially inward, which in turn causes the first locking part to deform or displace radially inward and limits the first locked part. The clamping arm locks with the receiving tube.

19. The clamping device as described in claim 18, characterized in that, When the mating part moves from the distal end to the proximal end until it just abuts against the control ring, at least a portion of the locked part is located on the distal side of the first locking part; When the clamping arm is locked to the storage tube, the locked part is located on the proximal side of the first locking part.

20. The clamping device as described in claim 19, characterized in that, The elongated groove comprises a second groove portion and a third groove portion. The third groove portion is located near the proximal end of the second groove portion. The first locking portion is located in the third groove portion and includes locking steps on both sides of the third groove portion. The first locked portion is the distal end face of the mating portion. After the mating part drives the control ring to move from the far end to the near end and pass the locking step, the control ring actuates the tube wall of the receiving tube to deform or displace radially inward, and the locking steps on both sides move toward each other to restrict the first locked part from moving to the far end, and the clamping arm locks with the receiving tube.

21. The clamping device as described in claim 18, characterized in that, After the first locking part limits the locked part, the movement of the control ring toward the proximal end is restricted. The control ring includes a second locking part, and the mating part includes a second locked part. After the position of the control ring is restricted, the second locking part restricts the movement of the second locked part toward the proximal end.

22. The clamping device as described in claim 21, characterized in that, One of the control ring and the receiving tube includes a spring piece, and the other includes a second limiting recess. The mating part drives the control ring to move from the distal end to the proximal end, so that the spring piece engages with the second limiting recess to limit the position of the control ring relative to the receiving tube.

23. The clamping device as described in claim 21, characterized in that, The clamp device includes a sheath, and the mating part drives the control ring to move from the distal end to the proximal end until the proximal end of the control ring abuts against the distal end of the sheath, thereby restricting the control ring from moving further proximal.

24. The clamping device as described in claim 17, characterized in that, The outer wall of the storage tube is provided with a trigger part, and the inner wall of the control ring is provided with an actuation part. The radial distance between the outermost edge of the trigger part and the central axis of the storage tube is greater than the radial distance between the innermost edge of the actuation part and the central axis of the storage tube. The control loop includes trigger positions: At the trigger position, the trigger part abuts against the actuating part, causing the wall of the receiving tube to deform or displace radially inward, thereby actuating the clamping arm to lock with the receiving tube.

25. The clamping device as described in any one of claims 17 to 24, characterized in that, The proximal end of the clamping arm includes an elastic cantilever, on which a mating part is provided, and the mating part has a tool contact surface; After the clamping arm is locked to the storage tube, the tool contact surface can deform the proximal end of the elastic cantilever radially inward under the action of a radially inward force to allow it to enter the channel of the storage tube, so that the clamping arm is unlocked from the storage tube and the elastic cantilever returns to its free state.

26. The clamping device as described in any one of claims 17 to 24, characterized in that, The receiving tube includes a second limiting recess, and the control ring includes a spring piece. When the clamping arm is locked to the storage tube, the spring piece engages with the second limiting recess; The spring is configured to deform to disengage from the second limiting recess. After the spring is disengaged from the second limiting recess, the control ring moves along the axial direction, the clamping arm is unlocked from the receiving tube, and the elastic cantilever returns to its free state.

Images