Clamp instrument and control method thereof

Abstract

The embodiment of the invention provides a clip instrument and a control method thereof. The clip instrument includes: a clip arm; the storage tube is used for storing the near end of the clamping arm; the near end of the storage tube is in releasable connection with the far end of the sheath tube; when the clamping arms move from the far end to the near end, the storage tube and the sheath tube can be directly actuated to be released, and / or the clamping arms and the storage tube can be directly actuated to be locked.

Description

A clamping device and its control method Technical Field

[0001] This manual relates to the field of medical devices, and in particular to a clamp device and its control method. Background Technology

[0002] Endoscopic clamps are medical instruments used in endoscopic surgery, primarily for hemostasis in cases of gastrointestinal bleeding, tumor resection, or other endoscopic procedures. These clamps play a crucial role in endoscopic surgery, helping to reduce surgical complications and improve the safety and effectiveness of the procedure. Endoscopic hemostatic clamps require high operational precision and controllability; therefore, a simple and reliable hemostatic clamp is needed. Summary of the Invention

[0003] This specification provides one or more embodiments of a clamping device, comprising: a clamping arm; a receiving tube for receiving the proximal end of the clamping arm; a sheath, the proximal end of the receiving tube being releasably connected to the distal end of the sheath; and a release ring axially movably slidingly engaging with the receiving tube, the release ring being configured to, when moving from the distal end to the proximal end, actuate the receiving tube and the sheath to release, and / or actuate the clamping arm and the receiving tube to lock.

[0004] One or more embodiments of this specification also provide a clamping device, comprising: a sheath including a channel and a mandrel disposed within the sheath, the mandrel including a connecting end; a receiving tube including at least one elongated groove extending axially, the elongated groove including a mounting groove and a sliding groove; a clamping arm including at least two elastic cantilever arms disposed at a proximal end, the proximal ends of the at least two elastic cantilever arms surrounding to form a connecting snap, the proximal end of at least one elastic cantilever arm including a mating portion; when the mating portion mates with the mounting groove, the connecting snap is assembled with the connecting end by radial deformation or displacement; when the mating portion mates with the sliding groove, the mating portion restricts the radial deformation or displacement of the elastic cantilever arm.

[0005] This specification also provides a control method for a clamping device, the clamping device including a clamping arm, a receiving tube, a release ring, and a sheath, the receiving tube being releasably connected to the sheath, and the clamping arm being axially movable within the receiving tube; the control method includes: controlling the clamping arm to move from a proximal end to a distal end to open the clamping arm; controlling the clamping arm to move from a distal end to a proximal end to close the clamping arm; controlling the release ring to move from a distal end to a proximal end to deform or displace the receiving tube radially inward, locking the clamping arm to the receiving tube, and / or releasing the receiving tube from the sheath.

[0006] Controlling the relationship between the receiving tube and sheath, and between the clamp arm and the receiving tube, by moving the release ring from the distal end to the proximal end simplifies the operation. Furthermore, compared to methods that use the clamp arm to actuate the release of the receiving tube and sheath, using the release ring simplifies the clamp arm structure and distinguishes between the movement of the clamp arm and the release and locking operations actuated by the release ring. Before the release ring moves, the clamp arm can repeatedly open and close, facilitating timely correction of the clamp arm's grip on the wound and improving hemostasis. 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 structure of the release ring according to some embodiments of this specification;

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

[0016] Figure 9 is a schematic diagram of the assembled structure of the receiving tube and the release ring according to some embodiments of this specification;

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

[0018] Figure 11 is a schematic diagram of the structure of the release ring according to some embodiments of this specification;

[0019] Figure 12 is a schematic diagram of the structure after the storage tube and clamping arm are assembled according to some embodiments of this specification;

[0020] Figure 13 is a schematic diagram of the assembled structure of the receiving tube and the release ring according to some embodiments of this specification;

[0021] Figure 14A is a structural schematic diagram of the unassembled state of the receiving tube and sheath tube according to some embodiments of this specification;

[0022] Figure 14B is a schematic diagram of the assembly of the receiving tube and the sheath tube according to some embodiments of this specification;

[0023] Figure 14C is a cross-sectional view of the clamping device shown along line AA according to some embodiments of Figure 14B;

[0024] Figure 15A is a schematic diagram of the clamping arm and mandrel in an unassembled state according to some embodiments of this specification;

[0025] Figure 15B is a cross-sectional view of the clamping device shown in some embodiments of Figure 15A, taken along line BB;

[0026] Figure 15C is a structural schematic diagram of the clamping arm and mandrel in an assembled state according to some embodiments of this specification;

[0027] Figure 15D is a cross-sectional view of the clamping device shown along line CC according to some embodiments of Figure 15C;

[0028] Figure 16A is a schematic diagram of the clamping arm in the closed state according to some embodiments of this specification;

[0029] Figure 16B is a cross-sectional view of the clamping device shown along line DD according to some embodiments of Figure 16A;

[0030] Figure 16C is a partial enlarged view of region A1 of the clamping device shown in some embodiments according to Figure 16B;

[0031] Figure 17A is a schematic diagram of the structure for releasing the receiving tube and sheath according to some embodiments of this specification;

[0032] Figure 17B is a cross-sectional view of the clamping device shown along line EE according to some embodiments of Figure 17A;

[0033] Figure 17C is a partial enlarged view of region A2 of the clamping device shown in some embodiments according to Figure 17B;

[0034] Figure 18A is a schematic diagram of the locking structure of the clamping arm and the storage tube according to some embodiments of this specification;

[0035] Figure 18B is a cross-sectional view of the clamping device shown in some embodiments of Figure 18A, taken along line FF;

[0036] Figure 18C is a schematic diagram of the clamping arm and storage tube before locking, according to some embodiments of this specification;

[0037] Figure 18D is a proximal side view of the clamping arm and the storage tube before locking, according to some embodiments of this specification.

[0038] Figure 18E is a schematic diagram of the clamping arm and the storage tube after locking, according to some embodiments of this specification;

[0039] Figure 18F is a proximal side view of the clamping arm and the storage tube after locking, according to some embodiments of this specification;

[0040] Figure 19A is a schematic diagram of the structure of the clamping arm and mandrel before release according to some embodiments of this specification;

[0041] Figure 19B is a schematic diagram of the structure after the clamping arm and mandrel are released, according to some embodiments of this specification;

[0042] Figure 19C is a cross-sectional view of the clamping device shown along line GG according to some embodiments of Figure 19B;

[0043] Figure 20A is a schematic diagram of the release structure of the receiving tube and sheath tube according to some other embodiments of this specification;

[0044] Figure 20B is a cross-sectional view of the clamping device shown in some embodiments of Figure 20A along the MM line;

[0045] Figure 21A is a schematic diagram of the release structure of the receiving tube and sheath tube according to some other embodiments of this specification;

[0046] Figure 21B is a cross-sectional view of the clamping device shown in some embodiments of Figure 21A along line NN;

[0047] Figure 22 is a schematic flowchart of a control method for a clamping device according to some embodiments of this specification.

[0048] The attached figures are labeled as follows:

[0049] 10. Clamping device; 100. Clamping arm; 110. Mating part; 111. Connecting part; 112. Locked part; 113. Slot; 120. Clamping part; 121. Distal connection part; 122. Bending part; 123. Proximal connection part; 130. Flexible cantilever; 140. Connecting buckle; 200. Conveying part; 210. Sheath; 211. Second connecting part; 220. Mandrel; 221. Connecting end; 222. Connector; 223. Limiting part; 300. Control part 310 Fixed handle; 320 Sliding handle; 400 Storage tube; 410 Long groove; 411 Assembly groove; 4111 Guide slope; 412 Sliding groove; 413 End groove; 414 First locking part; 420 First connecting part; 430 Trigger protrusion; 440 First limiting recess; 450 Second limiting recess; 500 Release ring; 510 Clearance hole; 520 Abutment part; 530 Clearance groove; 540 Spring piece; 550 Second locking part. Detailed Implementation

[0050] 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.

[0051] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Therefore, in some embodiments of this specification, it is desirable to provide a clamping device comprising a clamping arm, a receiving tube, a release ring, and a sheath. The release ring actuates the release of the receiving tube and sheath, simplifying operation and ensuring effective release. Other embodiments of this specification also provide a clamping device with an elastic cantilever at the proximal end of the clamping arm. The elastic cantilever forms a connecting buckle, which is releasably connected to a mandrel. This connecting buckle improves the connection stability between the clamping arm and the mandrel.

[0056] Figure 1 is an exemplary structural diagram of a clamping device 10 according to some embodiments of this specification.

[0057] 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 described in this specification, "proximal" and "distal" can refer to directions, meaning that along the axial direction of the clamp device 10 (or the extension direction of the sheath 210 of the delivery section 200), the side facing the operator is "proximal," and the side facing the insertion into the body for treatment is "distal." "Proximal" and "distal" can also refer to portions of structures located in the corresponding directions and should not be construed as referring only to the ends.

[0058] 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. The terms "axial" and "radial" used in the embodiments of this specification can refer to directions. The axial direction is the channel extension direction of the sheath 210, and the radial direction is perpendicular to the channel extension direction of the sheath 210.

[0059] In some embodiments, the control unit 300 consists of a fixed handle 310 and a sliding handle 320. The sliding handle 320 can slide axially relative to the fixed handle 310. The distal end of the sliding handle 320 is fixedly connected to the proximal end of the mandrel 220. The user controls the sliding handle 320 to move axially along the fixed handle 310 externally, thereby controlling the axial movement of the mandrel 220 within the sheath 210 channel, so that the clamp arm 100 can complete corresponding surgical operations, such as opening, closing, locking, and releasing.

[0060] 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, certain features, structures, or characteristics of the various embodiments can be appropriately combined or referenced.

[0061] Figure 2 is a partial cross-sectional view of the distal structure of the clamping device 10 according to some embodiments of this specification.

[0062] As shown in Figure 2, Embodiment 1 of this specification provides a clamp device 10, which includes a clamp arm 100, a storage tube 400, a sheath tube 210, and a release ring 500.

[0063] In some embodiments, the clamping arm 100 includes at least two clamping portions 120, which clamp a target object (e.g., a tissue wound) by opening, closing, or other operations, keeping the target object closed. The clamping arm 100 is in an open state when it 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 a closed state when it 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.

[0064] In some embodiments, the clamping portion 120 includes a distal engagement portion 121, a bending portion 122, and a proximal engagement portion 123. The receiving tube 400 is used to receive the proximal end of the clamping arm 100, where the proximal end of the clamping arm 100 refers to the bending portion 122 and / or the proximal engagement portion 123. Specifically, the proximal engagement portion 123 of the clamping arm 100 is always located within 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. 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 engagement 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 engagement portion 121. The distal joint 121 refers to the part used to hold tissue, and the distal joint 121 is always located outside the receiving tube 400.

[0065] In some embodiments, the proximal end of the receiving tube 400 is releasably connected to the distal end of the sheath 210; wherein, "releasable connection" in the embodiments of this specification may mean that the two components remain connected when a preset condition is met (e.g., when the two components form a limiting fit), and are released and separated from each other when the preset condition is not met (e.g., when the two components release the limiting fit). In some embodiments, after the receiving tube 400 and the sheath 210 are released, the receiving tube 400 and the clamping arm 100 remain at the target object, for example, the receiving tube 400 and the clamping arm 100 are retained at the wound to achieve hemostasis, and other components such as the sheath 210 and the mandrel 220 are withdrawn from the human body.

[0066] In some embodiments, the release ring 500 is axially movable and slidably engaged with the receiving tube 400. The release ring 500 is configured to, when moved from the distal end to the proximal end, actuate the receiving tube 400 and the sheath 210 to release, and / or actuate the clamping arm 100 and lock with the receiving tube 400. Controlling the relationship between the receiving tube 400 and the sheath 210, and between the clamping arm 100 and the receiving tube 400, through the movement of the release ring 500 from the distal end to the proximal end, simplifies operation. Furthermore, compared to the scheme of releasing the storage tube 400 and sheath 210 by actuating the clamp arm 100, the release ring 500 actuates the storage tube 400 and sheath 210, which simplifies the structure of the clamp arm 100 and distinguishes the movement of the clamp arm 100 from the release and locking operations actuated by the release ring 500. Before the release ring 500 moves, the clamp arm 100 can be repeatedly opened and closed, which is beneficial to timely correct the clamping of the clamp arm 100 on the wound and improve the hemostasis effect.

[0067] As shown in Figure 2, some other exemplary embodiments in Embodiment 1 of this specification also provide a clamp device 10, which includes a sheath 210, a storage tube 400, and a clamp arm 100.

[0068] In some embodiments, the sheath 210 includes a channel and a mandrel 220 disposed within the sheath 210. The mandrel 220 includes a connecting end 221 for releasable connection with the clamping arm 100. The clamping arm 100 includes at least two elastic cantilever arms 130 disposed at its proximal end. The proximal ends of the at least two elastic cantilever arms 130 surround to form a connecting snap-fit ​​140, which is configured to releasably connect with the connecting end 221. By setting the elastic cantilever arms 130 to form the connecting snap-fit ​​140, the length of the elastic cantilever arms 130 can be maximized without affecting the proximal strength of the clamping arm 100, allowing the connecting snap-fit ​​140 to have more ample accommodating space and ensuring a more reliable connection between the connecting snap-fit ​​140 and the connecting end 221.

[0069] In some embodiments, the proximal end of at least one elastic cantilever 130 includes a mating portion 110, and the receiving tube 400 includes at least one elongated groove 410 extending axially (see FIG. 3). The mating portion 110 is movably mated with the elongated groove 410, that is, the mating portion 110 is able to move along the trajectory defined by the elongated groove 410. The mating portion 110 may slide in contact with the elongated groove 410, or it may not contact the sidewall of the elongated groove 410, and may only make axial and / or radial movements within the range defined by the elongated groove 410.

[0070] In some embodiments, the elongated groove 410 includes an assembly groove 411 and a sliding groove 412 (see FIG. 3). When the mating part 110 engages with the assembly groove 411, the connecting buckle 140 assembles with the connecting end 221 through radial deformation or displacement, making the assembly process simple and easy to operate. When the mating part 110 engages with the sliding groove 412, the mating part 110 restricts the radial deformation or displacement of the elastic cantilever 130, keeping the connecting buckle 140 enclosed by the elastic cantilever 130 connected to the connecting end 221, achieving higher connection strength before release.

[0071] The clamping device 10 in some embodiments of this specification will now be described in detail with reference to Figures 3 to 7. Certain features, structures or characteristics of one or more embodiments of the clamping device 10 may be appropriately combined.

[0072] Figure 3 is a structural schematic diagram of the storage tube 400 according to some embodiments of this specification.

[0073] As shown in Figures 2 and 3, in some embodiments, the receiving tube 400 includes a first connecting portion 420 (see Figure 14C), and the sheath tube 210 includes a second connecting portion 211 (see Figure 14C). The first connecting portion 420 and the second connecting portion 211 are releasably connected. 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. In some embodiments, the first connecting portion 420 includes a connecting protrusion protruding from the outer wall of the receiving tube 400, and the second connecting portion 211 includes a radially inwardly oriented annular flange. The connecting protrusion releasably engages with the proximal end of the annular flange. By providing the annular flange, the connecting protrusion can mate with the annular flange in any circumferential direction. That is, the receiving tube 400 and the sheath tube 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 tube 210 for small-sized clamping devices 10. Specifically, the proximal end of the connecting protrusion is connected to the receiving tube 400, and the distal end protrudes from the side wall of the receiving tube 400, such that the connecting protrusion includes an inclined surface that slopes from the proximal end to the distal end, and a radially limiting surface is formed on the proximal side of the annular flange. When the proximal end of the connecting protrusion abuts against the annular flange, the inclined surface of the connecting protrusion can guide the annular flange to slide to the distal end of the connecting protrusion and beyond the distal end of the connecting protrusion, so that the distal end of the connecting protrusion and the limiting surface on the proximal side of the annular flange form a limiting fit.

[0074] Figure 4 is a structural schematic diagram of the release ring 500 according to some embodiments of this specification. Figure 5 is a structural schematic diagram of the housing tube 400 and the release ring 500 assembled according to some embodiments of this specification.

[0075] As shown in Figures 3 to 5, in some embodiments, a release ring 500 is disposed on the outer wall of the receiving tube 400. The release ring 500 is configured to actuate the side wall of the receiving tube 400 to deform or displace radially inward, causing the first connecting portion 420 to move radially inward until it disengages from the second connecting portion 211. In some embodiments, the receiving tube 400 includes a deformable or displaceable area, and the first connecting portion 420 is disposed in the deformable or displaceable area. The release ring 500 can deform or displace the deformable or displaceable area radially inward by squeezing or other means, thereby disengaging the first connecting portion 420 from the second connecting portion 211. In some embodiments, the receiving tube 400 forms a deformable or displaceable area on its sidewall by slotting (e.g., the long slot 410 in the embodiment below), or the receiving tube 400 has an axially extending support arm at its proximal end, which forms a deformable or displaceable area, or the receiving tube 400 forms a deformable or displaceable area by adding flexible material to a portion of its sidewall.

[0076] In some embodiments, the receiving tube 400 includes a trigger protrusion 430 disposed on the outer wall of the receiving tube 400 and configured to trigger radial inward deformation or displacement of the receiving tube 400 in response to movement or position of the release ring 500. Specifically, the release ring 500 includes an initial position and a working position: 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 release ring 500, and the outer wall of the sidewall of the receiving tube 400 is in contact with the inner wall of the release 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 release ring 500 does not exert a radial force on the receiving tube 400, and the receiving tube 400 is in a natural state, without radial deformation or displacement. In the working position, the trigger protrusion 430 abuts against the inner wall of the release ring 500. The release ring 500 exerts a radial force inward on the trigger protrusion 430, causing the side wall of the receiving tube 400 to deform or displace radially inward. By setting the release ring 500 and the trigger protrusion 430, the deformation or displacement of the side wall of the receiving tube 400 can be triggered simply by moving the release ring 500. This method is simple to operate, has high control precision, and reduces the risk of misoperation.

[0077] In some embodiments, the distal end of the trigger protrusion 430 is connected to the receiving tube 400, and the proximal end protrudes radially outward from the outer wall of the receiving tube 400, forming an inclined surface from the distal end to the proximal end of the trigger protrusion 430. In some embodiments, the release ring 500 includes a clearance hole 510. In the initial position, the trigger protrusion 430 engages with the clearance hole 510, and the release ring 500 does not exert a radial force on the receiving tube 400, and the receiving tube 400 is in a state of no deformation or displacement. When the release ring 500 moves from the distal end to the proximal end, the inclined surface of the trigger protrusion 430 can guide the proximal end of the trigger protrusion 430 to slide into the inner wall of the release ring 500, that is, guide the release ring 500 to move to the working position. The release ring 500 causes the side wall of the receiving tube 400 to deform or displace radially inward by squeezing the trigger protrusion 430, thereby releasing the first connecting portion 420 of the receiving tube 400 from the second connecting portion 211 of the sheath tube 210. During the movement of the release ring 500, the trigger cam 430 can generate a certain feedback resistance on the release ring 500, which can promptly alert the operator to the changes in the storage tube 400, enabling the operator to more accurately control the movement of the clamping arm 100.

[0078] Figure 6 is a structural schematic diagram of the clamping arm 100 according to some embodiments of this specification. Figure 7 is a structural schematic diagram of the clamping arm 100 and the receiving tube 400 after assembly according to some embodiments of this specification.

[0079] As shown in Figures 3 to 6, the receiving tube 400 includes at least one elongated groove 410 extending axially. The clamping arm 100 is provided with a mating part 110 at its proximal end. The mating part 110 is movably mated with the elongated groove 410. For example, the mating part 110 can contact the side wall of the elongated groove 410, so that the clamping arm 100 moves axially along the receiving tube 400 under the guidance of the elongated groove 410. For another example, the mating part 110 can be located within the range defined by the elongated groove 410, but form a gap with the side wall of the elongated groove 410, so that the clamping arm 100 can move axially and / or radially within the space defined by the elongated groove 410.

[0080] In some embodiments, the elongated groove 410 includes at least one of a sliding groove 412, an end groove 413, and an assembly groove 411.

[0081] In some embodiments, the elongated groove 410 includes a sliding groove 412.

[0082] In some embodiments, the sliding groove 412 is configured to guide the clamping arm 100 to move axially along the receiving tube 400. Specifically, when the mating part 110 of the clamping arm 100 engages with the sliding groove 412, the clamping arm 100 switches between an open state and a closed state. That is, when the mating part 110 moves distally along the sliding groove 412, the clamping arm 100 extends out of the receiving tube 400 and opens; when the mating part 110 moves proximally along the sliding groove 412, the clamping arm 100 retracts into the receiving tube 400 and closes. The mating part 110 can reciprocate within the sliding groove 412, enabling the clamping arm 100 to repeatedly open and close, facilitating timely correction of the clamping condition by the operator and quickly achieving hemostasis.

[0083] In some embodiments, the sliding groove 412 is configured to restrict the radial movement of the connecting latch 140 of the clamping arm 100. Specifically, the mating part 110 includes a slot 113, which engages with the sliding groove 412 to form a radial limit, thereby restricting the elastic cantilever 130 from deforming or displacing radially. This keeps the connecting latch 140 enclosed by the elastic cantilever 130 connected to the connecting end 221, achieving higher connection strength before release and preventing premature release of the clamping arm 100 and the connecting end 221 before locking. In some embodiments, the mating part 110 is configured as a support arm arranged radially or substantially radially, and the slot 113 is configured as a U-shaped or L-shaped slot on the support arm. The slot 113 includes a limiting step that abuts against the inner wall of the receiving tube 400 at the edge of the sliding groove 412, thereby restricting the mating part 110 from moving radially outward, and thus restricting the elastic cantilever 130 from deforming or displacing radially.

[0084] In some other embodiments, the sliding groove 412 can be replaced by a guide rail or magnetic strip provided on the inner wall of the receiving tube 400. For example, the inner wall of the receiving tube 400 is provided with an axially extending guide rail, and the mating part 110 includes a slider, which cooperates with the guide rail to cause the clamping arm 100 to move axially relative to the receiving tube 400. As another example, the side wall of the receiving tube 400 is provided with a magnetic strip, and the mating part 110 includes a magnetic head, which cooperates with the magnetic strip to cause the clamping arm 100 to move axially relative to the receiving tube 400.

[0085] In some embodiments, the elongated groove 410 includes an end groove 413, which is located near the end of the sliding groove 412.

[0086] In some embodiments, when the mating portion 110 engages with the end groove 413, the mating portion 110 is configured to drive the release ring 500 to move from the distal end to the proximal end. Specifically, the outer end of the mating portion 110 includes a mating portion 111, wherein the outer end of the mating portion 110 refers to the outermost end of the mating portion 110 in the radial direction. The release ring 500 includes an abutment portion 520, which is configured to engage with the mating portion 111 at the proximal end of the long groove 410. For example, the engagement positions of the mating portions 111 and 520 include, but are not limited to, the connection between the sliding groove 412 and the end groove 413, and the position of the distal section of the end groove 413. After the mating portion 111 engages with the abutment portion 520, the end groove 413 can provide space for the mating portion 110 to move proximal. When the mating portion 111 of the mating portion 110 moves from the distal end to the proximal end, the release ring 500 is driven to move from the distal end to the proximal end via the abutment portion 520.

[0087] In some embodiments, the release ring 500 moves from the distal end to the proximal end, actuating the clamping arm 100 to lock with the receiving tube 400. Specifically, the release ring 500 is disposed on the outer side wall of the receiving tube 400, and the release ring 500 is configured to actuate the side wall of the receiving tube 400 to deform or displace radially inward, reducing the width of the sliding groove 412 to restrict the movement of the mating portion 110 distally. In some embodiments, the mating portion 110 includes a locking portion 112; for example, the outer end portion of the mating portion 110 is configured as the locking portion 112, which is located outside the slot 113 in the radial direction. In some embodiments, the locking portion 112 and the mating portion 111 may be the same structure on the mating portion 110. In some embodiments, the locking portion 112 and the mating portion 111 may be different structures of the mating portion 110. In some embodiments, the width of the sliding groove 412 is smaller than the width of the end groove 413, and a step is formed between the sliding groove 412 and the end groove 413. This step constitutes a first locking part 414. When the width of the sliding groove 412 decreases, the first locking part 414 engages with the locked part 112, restricting the movement of the locked part 112 to the distal end. In other embodiments, the first locking part 414 may be a protrusion provided at the connection between the sliding groove 412 and the end groove 413. In some embodiments, the release ring 500 includes a second locking part 550, which restricts the movement of the locked part 112 to the proximal end. In some embodiments, the second locking part 550 may have the same structure as the abutment part 520. In other embodiments, the second locking part 550 may have a different structure from the abutment part 520. When the mating part 110 enters the end groove 413, the first locking part 414 and the second locking part 550 can respectively limit the locked part 112, thereby locking the clamping arm 100 and the storage tube 400.

[0088] In some embodiments, the release ring 500 moves from the distal end to the proximal end, actuating the receptacle 400 and sheath 210 to release. Further embodiments relating to the release of the receptacle 400 and sheath 210 can be found in the description of the trigger protrusion 430 in Figures 3 through 5.

[0089] It should be noted that the locking mechanism between the clamping arm 100 and the storage tube 400, and the release mechanism between the storage tube 400 and the sheath tube 210, both rely on the radial inward deformation or displacement of the storage tube 400. Therefore, the two operation steps can use the same triggering mechanism, such as the triggering convex 430, to simplify the structure and operation steps.

[0090] In some embodiments, the width of the end groove 413 is configured to allow the mating portion 110 to move radially outward within the end groove 413. Specifically, the connecting latch 140 is configured to release the clamping arm 100 from the mandrel 220 by deforming or displacing radially outward. For example, the width of the end groove 413 is greater than the width of the sliding groove 412 and greater than the characteristic dimension of the mating portion 110, wherein the characteristic dimension of the mating portion 110 refers to the dimension of the mating portion 110 in the width direction corresponding to the end groove 413. For more embodiments regarding the release of the clamping arm 100 from the mandrel 220, please refer to Figures 19A to 19C below and their related descriptions.

[0091] In some other embodiments, locking the clamping arm 100 to the storage tube 400 can be achieved by locking protrusion and locking recess, and releasing the storage tube 400 from the sheath tube 210 can be achieved by connecting pin. Therefore, the storage tube 400 can also be provided with only the assembly groove 411 and / or sliding groove 412, without the need to provide the end groove 413.

[0092] In some embodiments, the elongated groove 410 includes an assembly groove 411 located at the distal end of the sliding groove 412.

[0093] In some embodiments, when the mating part 110 mates with the mounting groove 411, the connecting snap 140 mates with the connecting end 221 by radial deformation or displacement. Specifically, the width of the mounting groove 411 is configured to allow the mating part 110 to move radially outward within the mounting groove 411, mate the clamping arm 100 with the mandrel 220, and the assembly process is simple and easy to operate. For more embodiments of the assembly of the clamping arm 100 and the mandrel 220, please refer to Figures 15A to 15D below and their related descriptions. For example, the width of the mounting groove 411 is greater than the width of the sliding groove 412 and greater than the characteristic dimension of the mating part 110, wherein the characteristic dimension of the mating part 110 refers to the dimension of the mating part 110 in the width direction corresponding to the mounting groove 411. In some embodiments, the mounting groove 411 includes a guide ramp 4111, which smoothly transitions from the mounting groove 411 to the sliding groove 412, allowing the mating part 110 to accurately and smoothly enter the sliding groove 412.

[0094] In some other embodiments, the proximal end of the clamping arm 100 may include a resilient connecting hole. The connecting hole and the mating part 110 are two different structures. The connecting end 221 of the spindle 220 and the connecting hole can be connected inside the receiving tube 400. Therefore, the receiving tube 400 may only be provided with the end groove 413 and / or the sliding groove 412, without the need to provide the assembly groove 411.

[0095] In some embodiments, the clamping arm 100 and the spindle 220 are releasably connected. Specifically, the distal end of the connecting end 221 includes a radially enlarged connector 222, and the proximal end of the connector 222 includes a limiting portion 223. For example, the connector 222 may be a tapered connector 222 with a diameter that gradually increases from the distal end to the proximal end, and the limiting portion 223 may be a step formed by the proximal surface of the tapered connector 222 facing the proximal end. When the mating portion 110 of the clamping arm 100 is located in the assembly groove 411, the connecting end 221 and the connecting snap 140 can be assembled. The connector 222 moves from the proximal end to the distal end, causing the elastic cantilever 130 to deform or displace radially outward. The connector 222 passes through the connecting snap 140, and the connecting snap 140 and the limiting portion 223 form a limiting. When the mating part 110 of the clamping arm 100 enters the end groove 413 and the clamping arm 100 is locked, the spindle 220 continues to move from the far end to the near end, causing the connecting end 221 to actuate the elastic cantilever 130 to deform or displace radially outward, and the connecting end 221 and the connecting buckle 140 are disengaged.

[0096] In some embodiments, the release ring 500 includes a clearance groove 530 corresponding to the elongated groove 410, and an abutment portion 520 is disposed at the proximal end of the clearance groove 530. When the mating portion 110 moves along the mounting groove 411 and the sliding groove 412, the clearance groove 530 provides space for the mating portion 110 to move, keeping the release ring 500 in its initial position. When the mating portion 110 moves from the sliding groove 412 to the end groove 413, the mating portion 110 abuts against the abutment portion 520 at the proximal end of the clearance groove 530, causing the release ring 500 to move to the working position. In some embodiments, the width of the clearance groove 530 is greater than the width of the elongated groove 410 to avoid interfering with the movement of the mating portion 110.

[0097] In some embodiments, the length of the release ring 500 is less than the length of the long groove 410. The clearance groove 530 is configured as a semi-open groove extending axially along the release ring 500. The distal end of the semi-open groove extends to the end of the release ring 500 to form an opening. After the mating part 110 moves a predetermined distance proximally along the long groove 410, the docking part 111 enters the clearance groove 530 and moves proximally to engage with the abutment part 520. In some embodiments, the opening of the semi-open groove of the release ring 500 is chamfered. This chamfer is used to guide the mating part 110 to accurately enter the clearance groove 530, ensuring accurate engagement between the mating part 110 and the abutment part 520. By shortening the axial length of the release ring 500, the weight of the clamp instrument 10 retained on the tissue can be reduced, making the structure more streamlined.

[0098] Embodiment 2 of this specification also provides a 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 difference lies in the structure of the storage tube 400.

[0099] Figure 8 is a structural schematic diagram of the release ring 500 according to some embodiments of this specification. Figure 9 is a structural schematic diagram of the housing tube 400 and the release ring 500 assembled according to some embodiments of this specification.

[0100] In some embodiments, the axial length of the release 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 release ring 500. The mating portion 111 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 portion 110. In this way, the release ring 500 is designed to be longer, which can wrap around most of the receiving tube 400, improving structural strength. Furthermore, the mating portion 111 of the mating portion 110 is always located within the clearance groove 530, which can improve the overall control accuracy.

[0101] Embodiment 3 of this specification also provides a clamp device 10, which is a modification of the clamp device 10 in Embodiment 1 or Embodiment 2. Compared with the clamp device 10 in Embodiment 1 or Embodiment 2, the difference is that the storage tube 400 and the release ring 500 are designed with added spring piece 540 and limiting recess.

[0102] Figure 10 is a structural schematic diagram of the receiving tube 400 according to some embodiments of this specification. Figure 11 is a structural schematic diagram of the release ring 500 according to some embodiments of this specification. Figure 12 is a structural schematic diagram of the receiving tube 400 and the clamping arm 100 assembled according to some embodiments of this specification. Figure 13 is a structural schematic diagram of the receiving tube 400 and the release ring 500 assembled according to some embodiments of this specification.

[0103] As shown in Figures 10 to 13, in some embodiments, one of the release ring 500 and the receiving tube 400 includes a spring piece 540, and the other includes a first limiting recess 440. When the release 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 release ring 500 and the receiving tube 400, and the other end extends toward the other of the release 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 is located at the distal end of the release ring 500. In some embodiments, the spring piece 540 or the first limiting recess 440 is located at the middle of the release ring 500. In some embodiments, the spring piece 540 and the release ring 500 are located at the proximal end of the release ring 500. By setting the spring piece 540 and the first limiting recess 440, the connection stability between the release ring 500 and the storage tube 400 can be improved before the clamping arm 100 and the storage tube 400 are locked, thus preventing relative displacement between the two.

[0104] In some embodiments, the spring 540 is configured to control the force required to move the release 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 release 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.

[0105] In some embodiments, one of the release ring 500 and the receiving tube 400 includes a spring piece 540, and the other includes a second limiting recess 450. When the release ring 500 is in the working position, the spring piece 540 engages with the second limiting recess 450, and the spring piece 540 is configured to restrict axial relative movement between the release ring 500 and the receiving tube 400. The spring piece 540 has elastic deformation capability, allowing it to move from the first limiting recess 440 into the second limiting recess 450. By providing the spring piece 540 and the second limiting recess 450, the connection stability between the release ring 500 and the receiving tube 400 can be improved after the clamping arm 100 is locked to the receiving tube 400, thus improving the locking stability.

[0106] 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 release 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 release ring 500 can be adjusted to a suitable range.

[0107] It should be noted that in Embodiment 1 and Embodiment 2, the spring 540, the first limiting recess 440, and the second limiting recess 450 are not provided. In this case, the axial movement between the release ring 500 and the receiving tube 400 can be limited by the friction between the two.

[0108] Based on the structural features of the clamp device 10 in the above three embodiments, the operation process of the clamp device 10 will be described below using the clamp device 10 in Embodiment 3 as an example.

[0109] Figures 14A to 19C are schematic diagrams illustrating the operation of the clamping device 10 according to some embodiments of this specification.

[0110] Figures 14A to 14C illustrate the assembly process of the receiving tube 400 and the sheath 210. As shown in Figure 14A, in the initial state, the clamping arm 100, the receiving tube 400, and the release ring 500 are assembled into one component, while the sheath 210 and the mandrel 220 are assembled into another component. As shown in Figures 14B and 14C, the receiving tube 400 and the sheath 210 approach each other, and the first connecting portion 420 of the receiving tube 400 mates with the second connecting portion 211 of the sheath 210 to form a limiting position. Specifically, the proximal end of the connecting protrusion of the receiving tube 400 approaches the annular flange of the sheath 210, and the annular flange is pressed along the inclined surface of the connecting protrusion, causing the receiving tube 400 to deform or displace radially inward. The annular flange passes over the connecting protrusion, and the distal side of the connecting protrusion forms a limiting position with the proximal side of the annular flange. At this point, the assembly of the receiving tube 400 and the sheath 210 is complete.

[0111] Figures 15A to 15D illustrate the assembly process of the clamping arm 100 and the mandrel 220. As shown in Figures 15A and 15B, in the initial state, the clamping arm 100 and the mandrel 220 are separated, and the mating part 110 of the clamping arm 100 engages with the assembly groove 411 of the receiving tube 400. As shown in Figures 15C and 15D, the mandrel 220 moves towards the clamping arm 100 at its distal end, and the connecting end 221 of the mandrel 220 gradually enters the connecting latch 140 of the clamping arm 100, forming a limiting position with the connecting latch 140. Specifically, the connector 222 of the connecting end 221 moves to the distal end and gradually enters the connecting buckle 140. At this time, the elastic cantilever 130 of the clamping arm 100 deforms or displaces radially outward under the action of the connector 222, causing the connecting buckle 140 to expand to receive the proximal end of the connector 222. After the proximal end of the connector 222 passes the connecting buckle 140, the elastic cantilever 130 returns to its original shape, and the distal end of the connecting buckle 140 forms an axial limit with the limiting part 223 of the proximal end of the connector 222. At this time, the clamping arm 100 and the mandrel 220 are assembled.

[0112] Figures 16A to 16C show the closed state of the clamping arm 100. When the mating part 110 of the clamping arm 100 engages with the mounting groove 411, the clamping part 120 is in the open state. The spindle 220 moves from the distal end to the proximal end, driving the clamping arm 100 into the receiving tube 400 at the proximal end. The mating part 110 moves from the end groove 413 to the sliding groove 412, and the clamping arm 100 closes. When the operator feels feedback resistance when pulling the spindle 220 towards the proximal end, it indicates that the clamping arm 100 has reached the extreme closed position. At this time, the operator can choose the subsequent operation method as needed, such as controlling the spindle 220 to move towards the distal end to open the clamping arm 100, or controlling the spindle 220 to continue moving towards the proximal end to lock the clamping arm 100.

[0113] Figures 17A to 17C show the released state of the receiving tube 400 and the sheath 210. When the release ring 500 is in the initial position, the spring piece 540 between the release ring 500 and the receiving tube 400 engages with the first limiting recess 440 (see Figure 16A), and the release ring 500 is in contact with the side wall of the receiving tube 400. As shown in Figures 17A to 17C, the spindle 220 drives the clamping arm 100 to continue moving towards the proximal end. The mating part 110 of the clamping arm 100 enters the end groove 413 from the sliding groove 412. The mating part 111 of the mating part 110 abuts against the abutting part 520 of the release ring 500. Then, the clamping arm 100 drives the release ring 500 to move towards the proximal end. At this time, the triggering protrusion 430 of the storage tube 400 disengages from the clearance hole 510 of the release ring 500 and enters the inner wall of the release ring 500. The inner wall of the release ring 500 causes the storage tube 400 to deform or displace radially inward by squeezing the triggering protrusion 430, thereby releasing the first connecting part 420 of the storage tube 400 from the second connecting part 211 of the sheath tube 210. At this time, the spring piece 540 engages with the second limiting recess 450.

[0114] Figures 18A to 18F illustrate the locking process between the clamping arm 100 and the receiving tube 400. When the release ring 500 is in the initial position, the sliding groove 412 of the receiving tube 400 allows the mating part 110 to slide freely. The spindle 220 controls the clamping arm 100 to move proximally. After the mating part 110 enters the end groove 413 from the sliding groove 412, it drives the release ring 500 to move to the working position. The trigger protrusion 430 causes the receiving tube 400 to deform or displace radially inward. At this time, the width of the sliding groove 412 decreases, and the first locking part 414 at the proximal end of the sliding groove 412 forms a limit with the locked part 112 of the mating part 110, restricting the clamping arm 100 from moving distally. At the same time, the second locking part 550 of the release ring 500 forms a limit with the locked part 112, restricting the clamping arm 100 from moving proximally.

[0115] Figures 19A to 19C illustrate the release process of the clamping arm 100 and the spindle 220. After the clamping arm 100 is locked with the receiving tube 400, the release ring 500 moves to the working position, and the mating part 110 engages with the end groove 413. Because the spring piece 540 engages with the second limiting protrusion, and the proximal end of the release ring 500 abuts against the distal end of the sheath 210, the second limiting protrusion and the sheath 210 can restrict the release ring 500 from continuing to move proximally. The release ring 500 restricts the clamping arm 100 from moving proximally through the mating part 110. The spindle 220 continues to move proximally, increasing the tension between the connecting end 221 and the clamping arm 100. When the tension increases to a force threshold, the connecting end 221 causes the elastic cantilever 130 of the clamping arm 100 to deform or displace radially outward, causing the connecting latch 140 to expand, and the connector 222 of the connecting end 221 disengages from the connecting latch 140.

[0116] The above operation process can be applied to the clamp device 10 in Embodiments 1 to 3. The difference between the operation process of the clamp device 10 in Embodiments 1 and 2 is that there is no engagement process between the spring piece 540 and the first limiting recess 440 and the second limiting recess 450.

[0117] Figure 20A is a schematic diagram of the movement of the release ring 500 of the clamp device 10 according to Embodiment 1 of this specification. Figure 20B is a cross-sectional view taken along line MM of the clamp device 10 in Figure 20A.

[0118] As shown in Figures 20A and 20B, when the release ring 500 is in its initial position, the trigger protrusion 430 of the storage tube 400 engages with the clearance hole 510 of the release ring 500. When the spindle 220 drives the clamping arm 100 to move proximally, the mating part 110 of the clamping arm 100 slides a preset distance in the sliding groove 412 and then enters the semi-open groove of the release ring 500. The mating part 111 of the mating part 110 enters the semi-open groove and moves proximally until it engages with the abutment part 520. The clamping arm 100 drives the release ring 500 to move proximally. At this time, the trigger protrusion 430 of the storage tube 400 disengages from the clearance hole 510 of the release ring 500 and enters the inner wall of the release ring 500. The inner wall of the release ring 500 causes the storage tube 400 to deform or displace radially inward by squeezing the trigger protrusion 430, thereby releasing the first connecting part 420 of the storage tube 400 from the second connecting part 211 of the sheath tube 210.

[0119] Figure 21A is a schematic diagram of the movement process of the release ring 500 of the clamp device 10 according to Embodiment 2 of this specification. Figure 21B is a cross-sectional view taken along line NN of the clamp device 10 in Figure 21A.

[0120] As shown in Figures 21A and 21B, when the release ring 500 is in its initial position, the trigger protrusion 430 of the receiving tube 400 engages with the clearance hole 510 of the release ring 500. When the spindle 220 drives the clamping arm 100 to move proximally, the mating part 110 of the clamping arm 100 slides within the intermediate groove of the release ring 500, and the mating part 111 of the mating part 110 slides to the proximity of the intermediate groove and engages with the abutment part 520. The clamping arm 100 drives the release ring 500 to move proximally. At this time, the trigger protrusion 430 of the receiving tube 400 disengages from the clearance hole 510 of the release ring 500 and enters the inner wall of the release ring 500. The inner wall of the release ring 500 causes 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 from the second connecting part 211 of the sheath tube 210.

[0121] Some embodiments of this specification also provide a control method for a clamping device 10, which is applied to the clamping device 10 in any of the above embodiments.

[0122] Figure 22 is a schematic flowchart of a control method for a clamping device 10 according to some embodiments of this specification.

[0123] As shown in Figure 22, process 2200 includes the following steps. In some embodiments, process 2200 can be executed by control unit 300. In some embodiments, the clamp device 10 includes a clamping arm 100, a receiving tube 400, a release ring 500, and a sheath 210. The receiving tube 400 and the sheath 210 are releasably connected, and the clamping arm 100 is axially movable within the receiving tube 400. It should be noted that the structure involved in this control method can be referred to the clamp device 10 in embodiments one to three above.

[0124] Step 2210: Control the clamping arm 100 to move from the proximal end to the distal end, so that the clamping arm 100 opens.

[0125] In some embodiments, the clamping arm 100 includes a mating portion 110, and the receiving tube 400 includes an elongated groove 410, which includes a sliding groove 412. The mating portion 110 of the clamping arm 100 is slidable along the sliding groove 412. The operating handle of the control unit 300 controls the spindle 220 to move from the proximal end to the distal end, causing the clamping arm 100 to move distally relative to the receiving tube 400, and the mating portion 110 of the clamping arm 100 to move distally relative to the sliding groove 412. When the distal engaging portion 121 and the bent portion 122 of the clamping arm 100 extend outside the receiving tube 400, the clamping arm 100 opens. When the mating portion 110 engages with the mounting groove 411, the clamping arm 100 is in its open limit state.

[0126] Step 2220: Control the clamping arm 100 to move from the distal end to the proximal end, so that the clamping arm 100 closes.

[0127] In some embodiments, the operating handle of the operating unit controls the spindle 220 to move from the distal end to the proximal end, driving the clamping arm 100 to enter the receiving tube 400 proximally. The mating part 110 moves from the end groove 413 to the sliding groove 412, and the clamping arm 100 closes. When the operator pulls the spindle 220 proximally and feels feedback resistance, it indicates that the clamping arm 100 has reached the extreme closed position. At this time, the operator can select the subsequent operation mode as needed, such as controlling the spindle 220 to move to the distal end to open the clamping arm 100 again, or controlling the spindle 220 to continue moving to the proximal end to lock the clamping arm 100.

[0128] Step 2230: Control the release ring 500 to move from the distal end to the proximal end, causing the receiving tube 400 to deform or displace radially inward, locking the clamp arm 100 with the receiving tube 400, and / or releasing the receiving tube 400 from the sheath 210.

[0129] In some embodiments, the clamping arm 100 includes a mating portion 110, the storage tube 400 includes a trigger protrusion 430 disposed on the outer wall of the storage tube 400, and the first connecting portion 420 of the storage tube 400 is releasably connected to the second connecting portion 211 of the sheath tube 210. In some embodiments, the operating handle of the control unit 300 controls the spindle 220 to move from the distal end to the proximal end, and the spindle 220 controls the clamping arm 100 to move from the distal end to the proximal end, so that the mating part 110 abuts against the release ring 500. Specifically, the mating part 111 of the mating part 110 abuts against the abutting part 520 of the release ring 500. Then, the release ring 500 is controlled to move from the distal end to the proximal end by the mating part 110, so that the trigger protrusion 430 enters the release ring 500 and abuts against the inner wall of the release ring 500. Next, the trigger protrusion 430 actuates the receiving tube 400 to deform or displace radially inward, so that the first connecting part 420 moves radially inward, the first connecting part 420 and the second connecting part 211 are disengaged, and the receiving tube 400 and the sheath 210 are released.

[0130] In some embodiments, the receiving tube 400 includes an elongated groove 410, which includes a sliding groove 412, an end groove 413, and a first locking portion 414 disposed between the sliding groove 412 and the end groove 413. The mating portion 110 includes a locked portion 112, and the release ring 500 includes a second locking portion 550. In some embodiments, during the movement of the clamping arm 100 from the distal end to the proximal end, the mating portion 110 is controlled to engage with the end groove 413, and the mating portion 110 drives the release ring 500 to move towards the proximal end. Next, the release ring 500 presses the trigger protrusion 430, which actuates the receiving tube 400 to deform or displace radially inward, reducing the width of the distal end of the sliding groove 412 to such that the first locking part 414 abuts against the locked part 112, thus restricting the movement of the locked part 112 distally; simultaneously, the second locking part 550 on the release ring 500 restricts the movement of the locked part 112 proximally, locking the clamping arm 100 and the receiving tube 400.

[0131] In some embodiments, the clamping arm 100 includes a mating portion 110, the receiving tube 400 includes a long groove 410, the long groove 410 includes a mounting groove 411 and an end groove 413, the clamping arm 100 includes an elastic cantilever 130 and a connecting buckle 140 disposed at the proximal end of the elastic cantilever 130, and the clamping device 10 includes a spindle 220 and a connecting end 221 disposed at the distal end of the spindle 220.

[0132] In some embodiments, the control method of the clamping device 10 further includes a method for assembling the clamping arm 100 with the mandrel 220. For example, the relative position of the clamping arm 100 and the receiving tube 400 is adjusted so that the mating portion 110 of the clamping arm 100 mates with the assembly groove 411 of the receiving tube 400. Next, the operating handle of the control unit 300 controls the mandrel 220 to move from the proximal end to the distal end, causing the connecting end 221 to exert a pressing force on the connecting latch 140. The connecting latch 140 drives the elastic cantilever 130 to deform or displace radially outward. After the connecting end 221 passes the connecting latch 140, the elastic cantilever 130 returns to its original shape, thus forming a limiting fit between the connecting end 221 and the connecting latch 140.

[0133] In some embodiments, the control method of the clamping device 10 further includes a method for releasing the clamping arm 100 from the spindle 220. For example, when the control unit 300 operates the spindle 220 to move from the distal end to the proximal end, it can control the mating portion 110 of the clamping arm 100 to engage with the end groove 413. Since the spring piece 540 engages with the second limiting protrusion, and the proximal end of the release ring 500 abuts against the distal end of the sheath 210, the second limiting protrusion and the sheath 210 can restrict the release ring 500 from continuing to move proximal. The release ring 500 restricts the clamping arm 100 from moving proximal through the mating portion 110. Then, the operating handle of the control unit 300 controls the spindle 220 to continue moving from the distal end to the proximal end, increasing the tension between the connecting end 221 and the connecting latch 140. When the tension increases to a force threshold, the connecting latch 140 drives the elastic cantilever 130 to deform or displace radially outward, releasing the connecting end 221 from the connecting latch 140.

[0134] The beneficial effects that the embodiments of this application may bring include, but are not limited to:

[0135] (1) Controlling the relationship between the receiving tube and the sheath, and between the clamp arm and the receiving tube, by moving the release ring from the distal end to the proximal end simplifies the operation. Furthermore, compared to the scheme of actuating the release of the receiving tube and the sheath by using the clamp arm, actuating the release of the receiving tube and the sheath by using the release ring simplifies the structure of the clamp arm and distinguishes the movement of the clamp arm from the release and locking operations actuated by the release ring. Before the release ring moves, the clamp arm can repeatedly open and close, which is beneficial for timely correction of the clamp arm's clamping position on the wound and improves the hemostatic effect.

[0136] (2) When the mating part mates with the assembly groove, the connecting buckle mates with the connecting end by radial deformation or displacement. The assembly process is simple and easy to operate.

[0137] (3) When the mating part is engaged with the sliding groove, the mating part restricts the radial deformation or displacement of the elastic cantilever, so that the connecting buckle enclosed by the elastic cantilever remains connected to the connecting end, and a higher connection strength can be achieved before release.

[0138] (4) By setting an annular flange, the connecting protrusion can be connected to the annular flange in any direction of the circumference. That is, the connection direction does not need to be identified when assembling the storage tube and the sheath. For small-sized clamping instruments, this greatly reduces the assembly difficulty of the storage tube and the sheath.

[0139] (5) By setting up an elastic cantilever to form a connecting buckle, the length of the elastic cantilever can be increased as much as possible without affecting the strength of the near end of the clamp arm, so that the connecting buckle has more room to accommodate and ensures a more reliable connection between the connecting buckle and the connecting end.

[0140] (6) By setting a release ring and a trigger convex, the side wall of the receiving tube can be deformed or displaced simply by moving the release ring. The operation is simple, the control accuracy is high, and the risk of misoperation is reduced.

[0141] (7) The length of the release ring is less than the length of the long groove, which can reduce the weight of the clamp instrument retained on the tissue and make the structure more concise.

[0142] (8) The axial length of the release ring is greater than the length of the long groove, which can wrap most of the storage tube and improve the structural strength.

[0143] (9) By setting a spring and a first limiting recess, the connection stability between the release ring and the storage tube can be improved before the clamping arm locks with the storage tube, preventing accidental locking or release during the opening and closing of the clamping arm.

[0144] (10) By setting a spring and a second limiting recess, the connection stability between the release ring and the storage tube can be improved after the clamping arm and the storage tube are locked, thus improving the locking stability.

[0145] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0146] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0147] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0148] 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.

[0149] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0150] 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: A clamping arm; a receiving tube for receiving the proximal end of the clamping arm; a sheath, the proximal end of the receiving tube being releasably connected to the distal end of the sheath; a release ring, the release ring being axially movable and slidably engaged with the receiving tube, the release ring being configured to, when moving from the distal end to the proximal end, actuate the receiving tube and the sheath to release, and / or actuate the clamping arm and the receiving tube to lock.

2. The clamping device as described in claim 1, characterized in that, The storage tube includes a first connecting portion, and the sheath includes a second connecting portion. The first connecting portion and the second connecting portion are releasably connected. A release ring is disposed on the outer side wall of the storage tube. The release ring is configured to actuate the side wall of the storage tube to deform or displace radially inward, thereby causing the first connecting portion to move radially inward until it is disengaged from the second connecting portion.

3. The clamping device as described in claim 2, characterized in that, The first connecting portion includes a connecting protrusion protruding from the outer wall of the receiving tube, and the second connecting portion includes an annular flange running radially inward, the connecting protrusion being releasably engaged with the proximal side of the annular flange.

4. The clamping device as described in claim 1, characterized in that, The receiving tube includes at least one elongated groove extending axially, the elongated groove including a sliding groove and an end groove, the end groove being located at the proximal end of the sliding groove; the proximal end of the clamping arm is provided with a mating part, the mating part being movably mated with the elongated groove; when the mating part is mated with the sliding groove, the clamping arm switches between an open state and a closed state; when the mating part is mated with the end groove, the mating part is configured to drive the release ring to move from the distal end to the proximal end, such that the release ring actuates the clamping arm to lock with the receiving tube.

5. The clamping device as described in claim 4, characterized in that, The release ring is disposed on the outer side wall of the receiving tube. The release ring is configured to actuate the side wall of the receiving tube to deform or displace radially inward, thereby reducing the width of the sliding groove and restricting the movement of the mating part to the distal end.

6. The clamping device as described in claim 5, characterized in that, The mating part includes a locked part, the width of the sliding groove is smaller than the width of the end groove, and a first locking part is formed between the sliding groove and the end groove. When the width of the sliding groove decreases, the first locking part and the locked part are engaged, and the first locking part restricts the locked part from moving to the distal end; the release ring includes a second locking part, and the second locking part restricts the locked part from moving to the proximal end.

7. The clamping device as described in claim 1, characterized in that, The receiving tube includes a trigger protrusion disposed on the outer wall of the receiving tube; the release ring includes an initial position and a working position: in the initial position, the radial distance between the outermost edge of the trigger protrusion and the central axis of the receiving tube is greater than the inner radius of the release ring, and the outer wall of the side wall of the receiving tube is in contact with the inner wall of the release ring; in the working position, the trigger protrusion abuts against the inner wall of the release ring, causing the side 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 connected to the receiving tube, and the proximal end protrudes radially outward from the outer wall of the receiving tube; the release ring includes a clearance hole, and in the initial position, the trigger protrusion engages with the clearance hole; when the release ring moves from the distal end to the proximal end, the proximal end of the trigger protrusion slides into the inner wall of the release ring, causing the side wall of the receiving tube to deform or displace radially inward.

9. The clamping device as described in claim 1, characterized in that, The receiving tube includes at least one elongated groove extending axially. The proximal end of the clamping arm is provided with a mating part, which movably engages with the elongated groove. The outer end of the mating part includes a docking part, and the release ring includes an abutting part. The abutting part is configured to engage with the docking part at the proximal end of the elongated groove. When the docking part moves from the distal end to the proximal end, the abutting part drives the release ring to move from the distal end to the proximal end.

10. The clamping device as described in claim 9, characterized in that, The release ring includes a clearance groove corresponding to the long groove, and the abutting part is located at the proximal end of the clearance groove; the axial length of the release ring is greater than the length of the long groove, and the clearance groove is constructed as an intermediate groove extending axially along the release ring, and the mating part moves axially along the clearance groove throughout the entire movement; or, the length of the release ring is less than the length of the long groove, and the clearance groove is constructed as a semi-open groove extending axially along the release ring, with the distal end of the semi-open groove extending to the end of the release ring to form an opening, and after the mating part moves a preset distance along the long groove towards the proximal end, the mating part enters the clearance groove and moves towards the proximal end to engage with the abutting part.

11. The clamping device as claimed in claim 1, characterized in that, One of the release ring and the receiving tube includes a spring plate, and the other includes a first limiting recess. When the release ring is in the initial position, the spring plate engages with the first limiting recess. The spring plate is configured to control the force required to move the release ring proximally within a preset force value range.

12. The clamping device as described in claim 11, characterized in that, The preset force value range includes 30N to 140N.

13. The clamping device as described in claim 1, characterized in that, One of the release ring and the receiving tube includes a spring plate, and the other includes a second limiting recess. When the release ring is in the working position, the spring plate engages with the second limiting recess, and the spring plate is configured to restrict the axial relative movement between the release ring and the receiving tube.

14. The clamping device as described in claim 1, characterized in that, The clamp device further includes a sheath and a mandrel disposed within the sheath. The proximal end of the clamp arm includes a connecting snap, and the distal end of the mandrel is releasably connected to the connecting snap. The receiving tube includes at least one elongated groove extending axially, the elongated groove including an assembly groove, a sliding groove, and an end groove. When the mating part mates with the assembly groove, the connecting snap is configured to connect to the distal end of the mandrel by radially outward deformation or displacement. When the mating part mates with the sliding groove, the sliding groove restricts the radial movement of the connecting snap. When the mating part mates with the end groove, the connecting snap is configured to release from the distal end of the mandrel by radially outward deformation or displacement.

15. A clamping device, characterized in that, include: A sheath includes a channel and a mandrel disposed within the sheath, the mandrel including a connecting end; a receiving tube includes at least one elongated groove extending axially, the elongated groove including a mounting groove and a sliding groove; a clamping arm includes at least two elastic cantilever arms disposed at a proximal end, the proximal ends of the at least two elastic cantilever arms enclosing to form a connecting snap, the proximal end of at least one elastic cantilever arm including a mating portion; when the mating portion mates with the mounting groove, the connecting snap is assembled with the connecting end by radial deformation or displacement; when the mating portion mates with the sliding groove, the mating portion restricts the radial deformation or displacement of the elastic cantilever arm.

16. The clamping device as described in claim 15, characterized in that, The distal end of the connecting end includes a radially enlarged connector, and the proximal end of the connector includes a limiting portion; when the connecting end is assembled with the connecting buckle, the connector moves from the proximal end to the distal end, causing the elastic cantilever to deform or displace radially outward, the connector passes through the connecting buckle, and the connecting buckle and the limiting portion form a limiting position.

17. The clamping device as described in claim 15, characterized in that, The assembly groove is located at the distal end of the sliding groove, and the width of the assembly groove is configured to allow the mating part to move radially outward within the assembly groove; the assembly groove includes a guide ramp that smoothly transitions from the assembly groove to the sliding groove.

18. The clamping device as described in claim 15, characterized in that, The mating part includes a slot, which is used to engage with the sliding groove and form a radial limit, thereby restricting the radial deformation or displacement of the elastic cantilever.

19. The clamping device as described in claim 15, characterized in that, The long groove also includes an end groove, the width of which is configured to allow the mating part to move radially outward within the end groove; after the clamping arm is locked, the spindle continues to move from the distal end to the proximal end, causing the connecting end to actuate the elastic cantilever to deform or displace radially outward, and the connecting end to disengage from the connecting buckle.

20. A method for controlling a clamping device, characterized in that, The clamp device includes a clamping arm, a receiving tube, a release ring, and a sheath. The receiving tube and the sheath are releasably connected, and the clamping arm is axially movable within the receiving tube. The control method includes: controlling the clamping arm to move from the proximal end to the distal end to open the clamping arm; controlling the clamping arm to move from the distal end to the proximal end to close the clamping arm; controlling the release ring to move from the distal end to the proximal end to deform or displace the receiving tube radially inward, locking the clamping arm with the receiving tube, and / or releasing the receiving tube from the sheath.

21. The control method as described in claim 20, characterized in that, The clamping arm includes a mating part, and the receiving tube includes a long groove, the long groove including a sliding groove; the mating part is controlled to move along the sliding groove to open or close the clamping arm.

22. The control method as described in claim 20, characterized in that, The clamping arm includes a mating portion, and the receiving tube includes a trigger protrusion on the outer wall of the receiving tube. The first connecting portion of the receiving tube is releasably connected to the second connecting portion of the sheath. The release of the receiving tube from the sheath includes: controlling the clamping arm to move from the distal end to the proximal end, so that the mating portion abuts against the release ring; controlling the release ring to move from the distal end to the proximal end through the mating portion, so that the trigger protrusion enters the release ring and abuts against the inner wall of the release ring; the trigger protrusion actuates the receiving tube to deform or displace radially inward, so that the first connecting portion moves radially inward, and the first connecting portion and the second connecting portion are disengaged.

23. The control method as described in claim 22, characterized in that, The receiving tube includes an elongated groove, which includes a sliding groove, an end groove, and a first locking portion disposed between the sliding groove and the end groove. The mating portion includes a locked portion, and the release ring includes a second locking portion. Locking the clamping arm to the receiving tube includes: controlling the mating portion to engage with the end groove; controlling the trigger convex to actuate the receiving tube to deform or displace radially inward, so that the width of the distal end of the sliding groove is reduced to such that the first locking portion abuts against the locked portion, the first locking portion restricting the movement of the locked portion to the distal end, and the second locking portion limiting the movement of the locked portion to the proximal end.

24. The control method as described in claim 20, characterized in that, The clamping arm includes a mating part, the receiving tube includes a long groove, the long groove includes an assembly groove and an end groove, the clamping arm includes an elastic cantilever and a connecting buckle located at the proximal end of the elastic cantilever, and the clamping device includes a mandrel and a connecting end located at the distal end of the mandrel; the control method further includes: controlling the mating part to mate with the assembly groove; controlling the mandrel to move from the proximal end to the distal end, causing the connecting end to drive the elastic cantilever to deform or displace radially outward through the connecting buckle, and the connecting end to connect with the connecting buckle; controlling the mating part to mate with the end groove; controlling the mandrel to move from the distal end to the proximal end, causing the connecting end to drive the elastic cantilever to deform or displace radially outward through the connecting buckle, and the connecting end to release from the connecting buckle.

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