Clip instrument and operation method therefor

Abstract

Provided in the embodiments of the description are a clip instrument and an operation method therefor. The clip instrument comprises: a delivery device comprising a sheath and a core shaft arranged in the sheath; and a clip device comprising at least two clip members, a receiving tube, and a second connecting part. The second connecting part is connected to the at least two clip members, the receiving tube is arranged at a distal end of the sheath and comprises a locking part, a proximal end of the clip member is axially movably arranged in the receiving tube and comprises a locked part, and the clip members are releasably connected to the core shaft. The clip device comprises an unlocked state, a locked state, and a released state. In the unlocked state, the core shaft is connected to the clip members, and the locked part has not been mated with the locking part yet; in the locked state, the core shaft is connected to the clip members, and the locked part is mated with the locking part; in the released state, the clip members are released from the core shaft.

Description

A clamping device and its operating method Cross-references

[0001] This application claims priority to Chinese patent application No. 202411196149.1, filed on August 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] In minimally invasive surgery, endoscopic clamps (e.g., hemostatic clips) are primarily used to hold human tissue for hemostasis and suturing. However, commonly used clamps often lack effective self-locking, requiring additional manipulation by the surgeon to ensure the clips remain stably locked, increasing surgical complexity and difficulty. Furthermore, even after locking, the clamps often lack stability, easily becoming loose, leading to poor hemostasis or suturing failure, and potentially causing secondary injury to the patient. In addition, fragments may fall during the procedure; these fragments can prevent the clip head from being easily removed and may even remain inside the patient, posing a potential health threat. Summary of the Invention

[0004] This specification provides one or more embodiments of a clamping device, comprising: a delivery device including a sheath and a mandrel disposed within the sheath, the distal end of the mandrel including a first connecting portion; a clamping device including at least two clamping plates, a receiving tube, and a second connecting portion, the second connecting portion being connected to the at least two clamping plates, the receiving tube being disposed at the distal end of the sheath, the proximal ends of the at least two clamping plates being axially movably disposed within the receiving tube, the at least two clamping plates including a blocking portion, the at least two clamping plates and the mandrel being releasably connected via the first connecting portion and the second connecting portion; and a blocking portion; wherein; The clamping device includes an unlocked state, a locked state, and a released state: In the unlocked state, the blocking part constrains the obstructed part radially inward, the radial gap between the proximal ends of the at least two clamping pieces and the receiving tube is within a preset range, and the first connecting part is connected to the second connecting part; In the locked state, the blocking part is released from the obstructed part, the proximal ends of the at least two clamping pieces deform or displace radially outward to engage with the receiving tube, and the first connecting part is connected to the second connecting part; In the released state, the first connecting part is disconnected from the second connecting part.

[0005] One embodiment of this specification provides a clamping device, comprising: a delivery device including a sheath and a mandrel disposed within the sheath, the distal end of the mandrel including a first connecting portion; and a clamping device including at least two clamping plates, a receiving tube, and a second connecting portion, the second connecting portion being connected to the at least two clamping plates, the receiving tube being disposed at the distal end of the sheath, the at least two clamping plates and the mandrel being releasably connected via the first connecting portion and the second connecting portion, the at least two clamping devices including an unlocked state, a locked state, and a released state; wherein, in the unlocked state, the first connecting portion and the second connecting portion form a first engagement state, and the proximal ends of the at least two clamping plates are axially movably disposed within the receiving tube; in the locked state, the first connecting portion deforms or displaces due to a first force and forms a second engagement state with the second connecting portion, the proximal ends of the at least two clamping plates are locked to the receiving tube; in the released state, the first connecting portion deforms or displaces due to a second force and is released from engagement with the second connecting portion, the mandrel is released from engagement with the at least two clamping plates.

[0006] This specification provides one or more embodiments of a clamping device, the clamping device including a conveying device, a clamping device, and a blocking part. The conveying device includes a mandrel, the distal end of which includes a first connecting part. The clamping device includes at least two clamping pieces, a receiving tube, and a second connecting part. The second connecting part is connected to the at least two clamping pieces, and the at least two clamping pieces include a blocked part. The operating method includes: when the first connecting part and the second connecting part are connected, controlling the radial gap between the proximal ends of the at least two clamping pieces and the receiving tube within a preset range by the blocking part; without releasing the connection between the first connecting part and the second connecting part, operating the mandrel to move from the distal end to the proximal end, triggering the blocking part and the blocked part to release the constraint, causing the proximal ends of the at least two clamping pieces to deform or displace radially outward to engage with the receiving tube, and locking the clamping device; operating the mandrel to continue moving from the distal end to the proximal end, releasing the connection between the first connecting part and the second connecting part, and releasing the connection between the clamping device and the conveying device. 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 an exemplary structural diagram of the distal structure of a clamping device according to some embodiments of this specification;

[0010] Figure 3 is a cross-sectional view taken along line AA of the clamping device shown in Figure 2;

[0011] Figure 4 is an exploded view of the clamping device shown in Figure 2;

[0012] Figure 5 is an exemplary structural diagram of the distal end structure of the mandrel according to some embodiments of this specification;

[0013] Figure 6 is a partial enlarged view of region B of the distal structure of the mandrel shown in Figure 5;

[0014] Figure 7 is a partially enlarged view of the clamp and side wing after being engaged according to some embodiments of this specification;

[0015] Figure 8 is a side view of the distal end structure of the mandrel according to some embodiments of this specification;

[0016] Figure 9 is an exemplary structural diagram of a clip according to some embodiments of this specification;

[0017] Figure 10 is an exemplary structural diagram of a storage tube according to some embodiments of this specification;

[0018] Figure 11A is a cross-sectional view of a clamping device in an unlocked state according to some embodiments of this specification;

[0019] Figure 11B is a cross-sectional view taken along line CC of the clamping device shown in Figure 11A;

[0020] Figure 12A is a cross-sectional view of a clamping device in a locked state according to some embodiments of this specification;

[0021] Figure 12B is a cross-sectional view taken along line DD of the clamping device shown in Figure 12A;

[0022] Figure 13 is a cross-sectional view of the first and second connecting portions in the released state, according to some embodiments of this specification;

[0023] Figure 14 is a cross-sectional view of the receptacle tube and sheath in the released state according to some embodiments of this specification;

[0024] Figure 15 is an exemplary structural diagram of the distal structure of a clamping device according to some embodiments of this specification;

[0025] Figure 16 is an exemplary structural diagram of a storage tube according to some embodiments of this specification;

[0026] Figure 17 is an exemplary structural diagram of the distal end structure of the mandrel according to some embodiments of this specification;

[0027] Figure 18 is an exemplary structural diagram of a clip according to some embodiments of this specification;

[0028] Figure 19 is a cross-sectional view of the clamping device in the open state according to some embodiments of this specification;

[0029] Figure 20 is a cross-sectional view of the clamping device in a closed state according to some embodiments of this specification;

[0030] Figure 21 is a cross-sectional view of a clamping device in a locked state according to some embodiments of this specification;

[0031] Figure 22A is a cross-sectional view of a clamping device in the released state according to some embodiments of this specification;

[0032] Figure 22B is a second cross-sectional view of the clamping device in the released state according to some embodiments of this specification;

[0033] Figure 23 is an exemplary structural diagram of a storage tube according to some embodiments of this specification;

[0034] Figure 24 is an exemplary structural diagram of a clip according to some embodiments of this specification;

[0035] Figure 25 is a cross-sectional view of the clamping device in an unlocked state according to some embodiments of this specification;

[0036] Figure 26 is a cross-sectional view of the clamping device in the locked state according to some embodiments of this specification;

[0037] Figure 27A is a schematic diagram of the clamping device in the released state according to some embodiments of this specification;

[0038] Figure 27B is a cross-sectional view taken along line FF in region E based on the clamping device shown in Figure 27A;

[0039] Figure 27C is a cross-sectional view taken along line GG of the clamping device shown in Figure 27B;

[0040] Figure 28 is an exemplary structural diagram of a clip according to some embodiments of this specification;

[0041] Figure 29 is an exemplary structural diagram of the distal end structure of the mandrel according to some embodiments of this specification;

[0042] Figure 30 is an exemplary structural diagram of the distal structure of a clamping device according to some embodiments of this specification;

[0043] Figure 31A is an exemplary isometric view of a mandrel distal end structure shown according to some embodiments of this specification;

[0044] Figure 31B is an exemplary front view of the mandrel distal end structure shown in Figure 31A;

[0045] Figure 31C is an exemplary side view of the mandrel distal end structure shown in Figure 31A;

[0046] Figure 32A is an exemplary structural diagram of a first predetermined form of a first connecting portion according to some embodiments of this specification;

[0047] Figure 32B is an exemplary structural diagram of a second predetermined form of the first connecting portion according to some embodiments of this specification;

[0048] Figure 33 is an exemplary structural diagram of a clip according to some embodiments of this specification;

[0049] Figure 34 is a cross-sectional view of the clamping device in an unlocked state according to some embodiments of this specification;

[0050] Figure 35 is a cross-sectional view of the clamping device in the locked state according to some embodiments of this specification;

[0051] Figure 36 is a cross-sectional view of a clamping device in the released state according to some embodiments of this specification;

[0052] Figure 37 is an exemplary structural diagram of the distal structure of a clamping device according to some embodiments of this specification;

[0053] Figure 38 is an exemplary structural diagram of a storage tube according to some embodiments of this specification;

[0054] Figure 39 is an exemplary structural diagram of a storage tube according to some embodiments of this specification;

[0055] Figure 40 is an exemplary cross-sectional view of the distal structure of a clamping device according to some embodiments of this specification;

[0056] Figure 41A is a front view of the distal end structure of the mandrel according to some embodiments of this specification;

[0057] Figure 41B is a second front view of the distal end structure of the mandrel according to some embodiments of this specification;

[0058] Figure 42A shows the engagement state of the first connecting part and the second connecting part in an unlocked state according to some embodiments of this specification;

[0059] Figure 42B shows the engagement state of the first connecting part and the second connecting part during the locking process according to some embodiments of this specification;

[0060] Figure 42C shows the engagement state of the first connecting part and the second connecting part in the locked state according to some embodiments of this specification;

[0061] Figure 43 is a flowchart of the operation method of the clamping device according to some embodiments of this specification;

[0062] Figure 44 is a flowchart of the operation method of another clamping device according to some embodiments of this specification.

[0063] The attached figures are labeled as follows:

[0064] 10. Clamping device; 100. Clamping assembly; 110. Clamping piece; 111. Distal clamping part; 112. Bending part; 113. Proximal joint part; 114. Assembly position; 115. Locked part; 116. Clearance part; 117. Locking hole; 120. Storage tube; 121. Limiting part; 122. Main tube; 123. Tail tube; 124. First limiting hole; 125. Locking part; 126. Slot; 127. Limiting structure; 130. Second connecting part; 131. Connecting shaft; 132. Connecting hole; 140. Obstructed part; 141. Elastic part; 150. Fitting part; 160. Positioning fitting part; 200. Conveying device; 210. Sheath tube; 211. Second limiting hole; 220 221. Spindle; 222. First connecting part; 2211. Connecting position; 222. First connecting position; 223. Second connecting position; 224. Guide channel; 225. Release port; 226. Connecting hook; 227. Actuating part; 2261. Arm; 2262. Hook; 2263. First limiting area; 2264. Second limiting area; 2265. First barb; 2266. Second barb; 228. Positioning mating part; 230. Connecting pin; 231. Tube; 232. Support arm; 240. Spring end; 300. Operating device; 400. Blocking part; 410. Side wing; 411. Body; 412. Pre-tightening part; 413. Reinforcing rib; 414. Welding point; 420. Tube arm. Detailed Implementation

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] Endoscopic clamp instruments are widely used in minimally invasive surgery to achieve rapid suturing and hemostasis by clamping tissue wounds. Traditional clamp instruments require the surgeon to directly apply force to the locking element or clamp to achieve locking, which is somewhat difficult to operate; furthermore, the locking of clamp instruments is unstable and prone to loosening, and some structures are prone to breakage during operation, resulting in debris and affecting surgical safety. In view of this, in some embodiments of this specification, it is desirable to provide a clamp instrument that achieves self-locking by configuring the proximal end of the clamp to automatically spring open, simplifying the operation; and that some easily deformable structures are reinforced to improve overall stability and reliability.

[0070] The technical solutions of the clamping instruments will be described below through several embodiments of this specification, aiming to improve the ease of operation and reliability of the clamping instruments in clinical surgery through some improvement measures. First, it should be noted that various combinations and substitutions can be made between different embodiments of this specification. For example, although some embodiments in this specification may only describe specific technical features, these features can be flexibly applied to other embodiments, or combined with features in other embodiments, to achieve better results. Unless explicitly stated that they are not interchangeable or combinable, different embodiments of the present invention and their features can be referenced and borrowed from each other to form new embodiments.

[0071] Figure 1 is an exemplary structural diagram of a clamping device according to some embodiments of this specification.

[0072] As shown in Figure 1, in some embodiments, the clamping device 10 includes a clamping device 100, a delivery device 200, and an operating device 300. The operating device 300 is disposed at the proximal end of the delivery device 200, and the clamping device 100 is disposed at the distal end of the delivery device 200. The terms "proximal end" and "distal end" used in the embodiments of this specification can indicate direction, meaning that along the axial direction of the clamping device 10 (e.g., the extension direction of the sheath 210 of the delivery device 200 within the endoscope channel), the side facing the operator is "proximal end," and the side facing the insertion into the body for treatment is "distal end." "Proximal end" and "distal end" can also refer to portions of structures located in the corresponding directions and should not be construed as referring only to the ends.

[0073] In some embodiments, the delivery device 200 includes a sheath 210 and a mandrel 220 disposed within the sheath 210. The mandrel 220 extends axially along the sheath 210, with its proximal end connected to the operating device 300 and its distal end connected to the clamping device 100. The terms "axial" and "radial" in the embodiments of this specification can refer to directions. The "radial" direction is perpendicular to the "axial" direction, or the axial direction is the direction in which the sheath 210 extends, and the radial direction is perpendicular to the direction in which the sheath 210 extends. The user controls the axial movement of the operating device 300 externally, thereby controlling the axial movement of the mandrel 220 within the channel of the sheath 210, enabling the clamping device 100 to perform corresponding surgical operations, such as opening, closing, locking, and releasing.

[0074] Figure 2 is an exemplary structural diagram of the distal structure of the clamp device 10 according to some embodiments of this specification. Figure 3 is a cross-sectional view of the clamp device 10 shown in Figure 2 taken along line AA. Figure 4 is an exploded view of the clamp device 10 shown in Figure 2.

[0075] As shown in Figures 2 to 4, some embodiments of this specification provide a clamping device 10, including a clamping device 100, a conveying device 200, and a blocking part 400.

[0076] In some embodiments, the clamp device 100 includes at least two clamping tabs 110, a receiving tube 120, and a second connecting portion 130. The second connecting portion 130 is connected to the at least two clamping tabs 110. The receiving tube 120 is disposed at the distal end of the sheath 210. The proximal ends of the at least two clamping tabs 110 are axially movably disposed within the receiving tube 120. The at least two clamping tabs 110 and the mandrel 220 are releasably connected via the first connecting portion 221 and the second connecting portion 130. The mandrel 220 controls the opening, closing, locking, and releasing of the clamping tabs 110 through axial movement.

[0077] In some embodiments, at least two clips 110 include a blocking portion 140. The blocking portion 140 is located near or at the proximal end of each clip 110. The number of clips 110 is set based on actual needs. Preferably, there are two clips 110, which simplifies the structure of the clamping device 100 while achieving the clamping function. It is understood that the two clips 110 are symmetrically arranged with respect to the axis of the receiving tube 120. When the number of clips 110 is greater than two, the clips 110 may be axially symmetrically distributed with respect to the axis of the receiving tube 120.

[0078] In some embodiments, the second connecting portion 130 is a structure in which at least two clips 110 connect to an external structure (such as the first connecting portion 221). The second connecting portion 130 may be a structure that is assembled and connected to at least two clips 110. For example, in some embodiments, the second connecting portion is a connecting shaft. The second connecting portion may also be a structure integrally formed with at least two clips. For example, in some other embodiments, the second connecting portion 130 is formed by the proximal ends of at least two clips 110. By way of example only, when two clips 110 are provided, the proximal ends of the two clips 110 may be respectively provided with corresponding protrusions and slots, which cooperate with each other to form the second connecting portion 130.

[0079] In some embodiments, the distal end of the mandrel 220 of the conveying device 200 includes a first connecting portion 221, which is used to connect the clamping device 100 so that the mandrel 220 controls the movement of the clamping device 100 through axial movement.

[0080] As shown in Figure 3, in some embodiments, the first connecting portion 221 is located between at least two clips 110. For example, the first connecting portion 221 is located between the proximal ends of at least two clips 110 to prevent the first connecting portion 221 from interfering with the radial movement of the proximal ends of the clips 110. In other embodiments, as shown in Figures 34-35, at least a portion of the first connecting portion 221 surrounds the outer side of the proximal ends of at least two clips 110.

[0081] In some embodiments, the blocking portion 400 is configured to control the state of the proximal end of the clip 110 by acting radially on the obstructed portion 140; wherein the state of the proximal end of the clip 110 includes a closed state in which the proximal ends of the two clips 110 are close to each other, and an unfolded state in which the proximal ends are far apart. In some embodiments, the blocking portion 400 is located at the distal end of the spindle 220. For example, the blocking portion 400 includes, but is not limited to, a side wing 410 (as shown in FIG. 5) or a connecting hook 226 (as shown in FIG. 32A and FIG. 32B), the side wing 410 or the connecting hook 226 being releasably engaged with the obstructed portion 140. In other embodiments, the blocking portion 400 is located on the inner wall of the receiving tube 120, and the obstructed portion 140 slides in contact with the blocking portion 400 within a preset travel range. For example, the blocking portion 400 includes, but is not limited to, a tube arm 420 (as shown in FIG. 16). More detailed embodiments of the blocking portion 400 will be described in FIG. 5, FIG. 6, and FIG. 15 to FIG. 18.

[0082] In some embodiments, the clamping device 100 includes an unlocked state, a locked state, and a released state:

[0083] In the unlocked state, the blocking part 400 is configured to radially and inwardly constrain the obstructed part 140, and the radial gap between the proximal ends of at least two clamping tabs 110 and the receiving tube 120 is within a preset range. At this time, the proximal ends of at least two clamping tabs 110 are close to each other and in a closed state. The preset range can be set according to the internal structure and size of the receiving tube 120. For example, the preset range includes, but is not limited to, being greater than zero and less than or equal to 1 / 4 of the diameter of the receiving tube 120, etc. Furthermore, the first connecting part 221 is connected to the second connecting part 130, and the mandrel 220 can control the repeated opening and closing of at least two clamping tabs 110, allowing for flexible adjustment of the clamping condition on the tissue in practical applications.

[0084] In the locked state, the blocking part 400 and the obstructed part 140 are released from constraint, and the proximal ends of at least two clips 110 deform or displace radially outward to engage with the receiving tube 120, so that the proximal ends of at least two clips 110 are in an unfolded state away from each other, and the axial movement of at least two clips 110 relative to the receiving tube 120 is restricted, and at least two clips 110 are locked inside the receiving tube 120. Furthermore, the first connecting part 221 is connected to the second connecting part 130. At this time, since the clips 110 are locked with the receiving tube 120, the spindle 220 can no longer control the clips 110 to open.

[0085] In the released state, the first connecting part 221 is disconnected from the second connecting part 130, and the spindle 220 is released from at least two clips 110.

[0086] In some embodiments, the unlocked state of the clamping device 100 includes an open state and a closed state. In some embodiments, each of the at least two clamping tabs 110 includes a distal clamping portion 111, a bent portion 112, and a proximal engaging portion 113. The proximal engaging portion 113 is movably disposed within the receiving tube 120, and the bent portion 112 is elastic. In the open state, when the mandrel 220 moves from the proximal end to the distal end, the proximal engaging portion 113 pushes the bent portion 112 out of the receiving tube 120, and the bent portion 112 is in a natural bent state, causing the distal clamping portions 111 to move away from each other and open. In the closed state, when the mandrel 220 moves from the distal end to the proximal end, the proximal engaging portion 113 pulls the bent portion 112 back into the receiving tube 120, and the bent portion 112 is compressed by the receiving tube 120, causing the distal clamping portions 111 to move closer to each other and close.

[0087] According to the clamping device 10 in some of the above embodiments, when the blocking part 400 engages with the blocked part 140, at least two clamping pieces 110 can freely open or close. When the blocking part 400 disengages from the blocked part 140, the proximal ends of at least two clamping pieces 110 can deform or displace radially outward and lock with the receiving tube 120. The entire locking process is achieved by the automatic deformation of the proximal ends of the clamping pieces 110, reducing the need for locking operations. After the proximal ends of the clamping pieces 110 engage with the receiving tube 120, the receiving tube 120 can restrict the axial and radial displacement of the proximal ends of the clamping pieces 110, improving the locking stability of the clamping pieces 110. Furthermore, before and during locking of the clamping pieces 110, the first connecting part 221 and the second connecting part 130 are connected. After the clamping pieces 110 are locked, the first connecting part 221 is released from the second connecting part 130, making the operation more precise and reliable, reducing the possibility of misoperation, and improving the safety of surgical operations.

[0088] In some embodiments, the blocking portion 400 is located at the distal end of the spindle 220. In some embodiments, the blocking portion 400 is a plurality of symmetrically arranged blocking structures (such as side wings 410, connecting hooks 226, etc.), and the axis of symmetry of the blocking portion 400 coincides with the axis of the spindle 220.

[0089] In some embodiments, the blocking part 400 (such as the side wing 410, connecting hook 226, etc.) and the blocked part 140 are released from constraint by axial relative displacement. For example, when the mandrel 220 moves from the distal end to the proximal end, it causes the blocking part 400 to move from the distal end to the proximal end. That is, the blocking part 400 and the blocked part 140 undergo axial relative displacement, and the blocked part 140 disengages from the blocking part 400, thereby releasing the constraint between the blocking part 400 and the blocked part 140. In this way, the release timing of the blocking part 400 and the blocked part 140 can be precisely controlled by the axial movement of the mandrel 220. The operation is simple and quick, ensuring accurate release of the clamp device 100 when needed, and improving the precision of the surgical operation.

[0090] In some embodiments, as shown in Figures 3 and 4, the receiving tube 120 includes a limiting portion 121, the clamping device 100 includes a mating portion 150, at least two clamping pieces 110 move from the distal end to the proximal end, when the mating portion 150 abuts against the limiting portion 121, the limiting portion 121 restricts the movement of at least two clamping pieces 110 from the distal end to the proximal end, the spindle 220 continues to move towards the proximal end, and the axial relative displacement between the blocking portion 400 and the obstructed portion 140 releases the constraint.

[0091] In some embodiments, the limiting portion 121 is provided at or near the proximal end of the receiving tube 120 and protrudes radially inward.

[0092] In some embodiments, as shown in FIG3, the receiving tube 120 includes a radially inward protrusion that constitutes the limiting portion 121. For example, the protrusion may include annular protrusions or dot-shaped protrusions, and the shape of the protrusion may include rectangular, stepped, or other shapes. In some embodiments, the receiving tube 120 includes a main tube 122 and a tail tube 123. The distal end of the tail tube 123 is fixed to the inner side of the proximal end of the main tube 122, and the distal end of the tail tube 123 forms a stepped protrusion with the inner wall of the main tube 122, which constitutes the limiting portion 121.

[0093] In some embodiments, the clamping device 100 includes a connecting shaft 131 that radially passes through and connects to at least two clamping pieces 110. At least one end of the connecting shaft 131 forms a mating portion 150. In some embodiments, the proximal ends of the at least two clamping pieces 110 are respectively provided with openings radially, and the connecting shaft 131 passes through the openings on each clamping piece 110 to connect the proximal ends of the at least two clamping pieces 110. It is understood that both ends of the connecting shaft 131 may form mating portions 150 to make the force between the mating portions 150 and the limiting portion 121 more stable.

[0094] In some embodiments, as shown in FIG3, the obstruction portion 140 includes at least two elastic portions 141 disposed near the proximal ends of the at least two clips 110. In some embodiments, each clip 110 has one elastic portion 141. The elastic portions 141 may be disposed near the proximal ends of the clips 110 to engage with the blocking portion 400.

[0095] Figure 5 is an exemplary structural diagram of the distal structure of the mandrel 220 according to some embodiments of this specification. Figure 6 is a partial enlarged view of region B of the distal structure of the mandrel 220 shown in Figure 5. Figure 7 is a partial enlarged view of the clamp 110 and the side wing 410 after engagement according to some embodiments of this specification. Figure 8 is a side view of the distal structure of the mandrel 220 according to some embodiments of this specification.

[0096] In some embodiments, as shown in Figures 5 to 7, the blocking portion 400 includes at least two side wings 410, the positions of which correspond one-to-one with the positions of at least two elastic portions 141 in the circumferential direction; the proximal ends of the at least two side wings 410 are respectively connected to the spindle 220, and the distal ends of the at least two side wings 410 form gaps with the spindle 220. The circumferential direction is the direction of rotation about the axis of the spindle 220.

[0097] In some embodiments, the number of side wings 410 is determined based on the number of clips 110, and at least two side wings 410 are provided circumferentially distributed on the sides of the first connecting portion 221. The phrase "at least two side wings 410 and at least two elastic portions 141 are circumferentially aligned" can be understood as: the side wings 410 and the corresponding elastic portions 141 are aligned at the same circumferential angle, such that the side wings 410 can press the corresponding elastic portions 141 (i.e., the elastic portions 141 restricted by the side wings 410) onto the first connecting portion 221. Taking the provision of two side wings 410 and two clips 110 as an example, as shown in Figures 5 to 7, the two side wings 410 are respectively located on both sides of the first connecting portion 221 circumferentially, used to press the corresponding elastic portions 141 onto the first connecting portion 221.

[0098] The side wing 410 includes a fixed end and a free end. In some embodiments, the proximal end of the side wing 410 is the fixed end, which is fixed to the mandrel 220; the distal end of the side wing 410 is the free end, which forms a gap with the mandrel 220.

[0099] In some embodiments, the side wing 410 has an enclosing structure, with its fixed end and free end extending circumferentially along the mandrel. When there are two side wings 410, the fixed end of one side wing 410 (such as the first side wing) is connected to one side of the mandrel 220 and extends a predetermined length enclosingly around the mandrel 220, with a gap formed between the free end of the first side wing and the mandrel 220. The fixed end of the other side wing 410 (the second side wing) is connected to the side of the mandrel 220 opposite to the connection side of the first side wing, and extends a predetermined length around the mandrel 220 in the same enclosing direction as the first side wing, with a gap formed between the free end of the second side wing and the mandrel 220.

[0100] Understandably, the first connecting part 221 is part of the spindle 220, and there is also a gap between the distal end of the side wing 410 and the first connecting part 221. The fixed end of the side wing 410 can also be directly connected to the first connecting part 221.

[0101] In some embodiments, in the unlocked state, the obstructed portion 140 is located within the gap. In some embodiments, the obstructed portions 140 of the proximal ends of at least two clips 110 extend into the gap on the side of the first connecting portion 221, and at least two side wings 410 are capable of radially restricting the proximal ends of at least two clips 110 on the side of the first connecting portion 221.

[0102] In some embodiments, the side wing 410 is provided with reinforcing ribs 413 and / or welding points 414 to increase the strength of the side wing 410 and prevent the side wing 410 from accidentally breaking or deforming, which would cause the proximal end of the clamp 110 to fail.

[0103] In some embodiments, the side wing 410 includes a body 411 and a pre-tightening portion 412. The proximal end of the body 411 is fixed to the distal end of the spindle 220, and the distal end of the body 411 is connected to the pre-tightening portion 412. The pre-tightening portion 412 is configured to provide a pre-tightening force to the proximal end of the corresponding clip 110. This pre-tightening force presses the proximal end of the corresponding clip 110 against the first connecting portion 221. When the clip 110 moves axially in the unlocked state, it can prevent the proximal end of the clip 110 from accidentally dislodging from the gap between the side wing 410 and the first connecting portion 221, thus avoiding unexpected situations such as premature self-locking or locking failure of the clip 110. In some embodiments, the pre-tightening portion 412 may be formed by bending the distal end of the body 411 at a certain angle. In other embodiments, the distal end of the body 411 includes an elastic protrusion protruding toward the first connecting portion 221, and this elastic protrusion is configured as the pre-tightening portion 412. It is understood that in some other embodiments, the side wing 410 may not be provided with the pretensioning part 412 (e.g., the side wing 410 shown in FIG29).

[0104] As shown in Figure 7, in some embodiments, the pre-tightening force generated by the pre-tightening portion 412 on the clamp 110 causes a first preset angle α to be formed between the proximal end of the corresponding clamp 110 and the first connecting portion 221. For example, the range of the first preset angle α is 0–10°, and preferably, the first preset angle α is approximately 5°. By designing appropriate side wings 410 and pre-tightening force, sufficient pre-tightening force is applied to the proximal end of the clamp 110 by the side wings 410, ensuring that the clamp 110 maintains proper position and stability during operation. This angle design also allows the distal end of the clamp 110 to form a sufficient span, thereby effectively clamping the target tissue.

[0105] As shown in Figure 8, in some embodiments, the pre-tightening portion 412 of the side wing 410 is formed by bending the distal end of the body 411 towards the first connecting portion 221 at a certain angle. The connection between the pre-tightening portion 412 and the body 411 forms a second preset angle β, which is arranged facing the first connecting portion 221. For example, the range of the second preset angle is 150° to 180°, and preferably, the second preset angle β is about 160°. Within this angle range, the pre-tightening force of the side wing 410 on the obstructed portion 140 of the clamp 110 is within a suitable range, which can ensure the stability of the clamp 110's engagement with the side wing 410 in the unlocked state, preventing accidental detachment, and also ensure that the clamp 110 can be smoothly disengaged from the side wing 410 when locked, preventing the clamp 110 from being unable to separate.

[0106] Figure 9 is an exemplary structural diagram of the clip 110 according to some embodiments of this specification. Figure 10 is an exemplary structural diagram of the storage tube 120 according to some embodiments of this specification.

[0107] As shown in Figures 9 and 10, in some embodiments, the receiving tube 120 includes a locking part 125, and at least two clips 110 include locked parts 115. After the blocking part 400 and the obstructed part 140 are released from their constraints, the proximal ends of the at least two clips 110 deform or displace radially outward, and the locking part 125 cooperates with the locked part 115.

[0108] In some embodiments, the locking portion 115 protrudes from the inner wall of the receiving tube 120 and is located near the end of the clip 110. In other embodiments, the locking portion 115 is located on the obstructed portion 140. For example, the locking portion 115 may be a groove or hole formed in the elastic portion.

[0109] In some embodiments, when the clip 110 is in the closed state, the bent portion 112 retracts into the receiving tube 120 and generates elastic compression. After the blocking portion 400 and the blocked portion 140 are released from constraint, the bent portion 112 drives the proximal end of the clip 110 to automatically deform or displace radially outward under the action of elastic restoring force, so that the locking portion 125 and the locked portion 115 automatically form a fit.

[0110] In some embodiments, the locking portion 125 and the locked portion 115 form a limiting engagement on the side wall of the receiving tube 120; the locking portion 125 includes a first recess provided on the side wall of the receiving tube 120, and the locked portion 115 includes a first protrusion provided on the proximal end of at least two clips 110 and protruding radially outward; when the first recess engages with the first protrusion, the clip device 100 is locked.

[0111] In some embodiments, the first recess includes, but is not limited to, grooves, holes, etc. For example, the first recess may be a groove formed on the sidewall of the receiving tube 120, which extends circumferentially along the receiving tube 120 and has a certain length, facilitating the accurate fitting of the first protrusion into the groove. The first protrusion includes, but is not limited to, protrusions, flanges, hook structures, etc. For example, the first protrusion is formed on one side of the proximal end of the clip 110 and protrudes radially outward, wherein radial refers to the radial direction of the receiving tube 120 when the clip 110 is assembled in the receiving tube 120. By providing the first recess and the first protrusion to fit together, the clip 110 and the receiving tube 120 are limited in both the axial and radial directions, improving the stability of the locking.

[0112] In some embodiments, when the obstructed portion 140 of the clip 110 engages with the side wing 410, the locked portion 115 of the clip 110 and the side wing 410 form an abutment limit, which can prevent the clip 110 from swinging radially and causing misalignment.

[0113] In some embodiments, the first connecting portion 221 is provided with a connection position that can cooperate with the second connecting portion 130. The first connecting portion 221 may include only one connection position, such as the first connecting portion 221 shown in FIG17.

[0114] The first connecting portion 221 may also include multiple connecting positions. As shown in FIG5, in some embodiments, the first connecting portion 221 includes a first connecting position 222 and a second connecting position 223. In the unlocked state, the first connecting position 222 and the second connecting portion 130 are connected. When the spindle 220 moves from the distal end to the proximal end, the first connecting position 222 deforms or displaces due to the first force and disengages from the second connecting portion 130, so that the second connecting position 223 and the second connecting portion 130 are connected, and the blocking portion 400 and the blocked portion 140 undergo axial relative displacement to release the constraint. When the spindle 220 continues to move from the distal end to the proximal end, the second connecting position 223 deforms or displaces due to the second force and disengages from the second connecting portion 130, and the first connecting portion 221 and the second connecting portion 130 are released. The clamp device 100 is locked by the first deformation or displacement of the first connecting part 221, and the mandrel 220 is released from the clamp piece 110 by the second deformation or displacement of the first connecting part 221. This makes the operation more precise and reliable, reduces the possibility of misoperation, and improves the safety of the surgery. It should be noted that the first connecting part 222 and the second connecting part 223 can be constructed in various structural forms, such as a hole-shaped groove, a limiting groove with an opening, etc. The first connecting part 221 can also have various structural forms. For various specific structural forms of the first connecting part, the first connecting part, and the second connecting part, please refer to the relevant descriptions of Figures 5, 29, 31A-31C, 32A-32B, 41A-41B, and 42A-42C in other parts of this specification.

[0115] Understandably, the clamp device 100 is in an unlocked state during assembly. In some embodiments, at least two clamping pieces 110 are provided with mounting positions that connect to the second connecting portion 130. When assembling the clamp device, after aligning the mounting positions with the first connecting positions, the second connecting portion 130 (such as the connecting shaft 131) can be inserted into the mounting positions and the first connecting positions.

[0116] Figure 28 is an exemplary structural diagram of a clip according to some embodiments of this specification; Figure 29 is an exemplary structural diagram of a distal structure of a mandrel according to some embodiments of this specification; Figure 30 is an exemplary structural diagram of a distal structure of a clamping device according to some embodiments of this specification.

[0117] In some embodiments, as shown in Figures 28 and 29, at least two clips 110 include mounting positions 114, a second connecting portion 130 is connected to at least two clips 110 at mounting positions 114, a spindle 220 includes a positioning portion 228, and a clamping device 100 includes a positioning mating portion 160. When the positioning portion 228 abuts against the positioning mating portion 160, the mounting position 114 is coaxial with the first connecting position 222.

[0118] In some embodiments, the positioning engagement portion 160 and the locking portion 115 are respectively disposed on both sides of the obstructed portion 140 of the clamping piece 110. The reinforcing rib 413 may not be provided on the side wing 410, the side wing 410 does not apply residual preload to the clamping piece 110, and the positioning portion 228 is disposed at the distal end of the spindle 220.

[0119] As shown in Figures 29 and 30, during the assembly of at least two clips 110 to the first connecting portion 221, the at least two clips 110 move proximally and insert into the space between the corresponding side wing 410 and the first connecting portion 221. When the proximity of the positioning mating portion 160 abuts against the positioning portion 228, the clips 110 stop moving proximally. At this point, the axes of the assembly position 114 and the first connecting position 222 are aligned. In some embodiments, the second connecting portion 130 is specifically configured as a connecting shaft 131. After the axes of the assembly position 114 and the first connecting position 222 are aligned, the connecting shaft 131 is inserted into the assembly position 114 and the first connecting position 222 to connect the clips 110 and the first connecting portion 221. This configuration avoids difficulties in assembling the clips 110 and the first connecting portion 221 due to excessive preload applied by the side wing 410.

[0120] The clamping device and conveying device in the embodiments of this specification are releasable. In some embodiments, the releasable connection between the clamping device and the conveying device includes, in addition to the releasable connection between the first connecting part and the second connecting part, a releasable connection between the receiving tube and the sheath. After the first connecting part and the second connecting part are disconnected, a component of the clamping device (such as a mandrel) can be further manipulated to release the connection between the receiving tube and the sheath, thereby releasing the connection between the clamping device and the conveying device.

[0121] As shown in Figures 3, 4, and 10, in some embodiments, the clamp device 10 further includes a connecting pin 230, through which the receiving tube 120 and the sheath 210 are releasably connected. In some embodiments, the proximal end of the receiving tube 120 includes at least two first limiting holes 124, and the distal end of the sheath 210 includes second limiting holes 211 respectively arranged corresponding to the first limiting holes 124. The connecting pin 230 includes a tube portion 231 and at least two supporting arms 232 extending distally from the tube portion 231. Each supporting arm 232 is provided with a limiting hook at its distal end, and each limiting hook passes through the first limiting hole 124 and the second limiting hole 211 respectively, so that the receiving tube 120 and the sheath 210 are releasably connected. In some embodiments, the sheath 210 includes a spring end 240, which is fixed (e.g., welded) to the distal end of the sheath 210. The tube portion 231 of the connecting pin 230 is disposed within the spring end 240, and a second limiting hole 211 is disposed on the side wall of the spring end 240. The spring end 240 is provided to facilitate the assembly of various components.

[0122] In some embodiments, the distal end of the spindle 220 includes an actuating portion 227, and the connecting pin 230 is configured such that, after the clamping device 100 is locked, the spindle 220 moves from the distal end to the proximal end, and the actuating portion 227 actuates the connecting pin 230 to deform and / or displace, thereby releasing the receiving tube 120 and the sheath 210. In some embodiments, the actuating portion 227 is formed by a side wing 410 at the distal end of the spindle 220. In other embodiments, the distal end of the spindle 220 has a protrusion that forms the actuating portion 227. In other embodiments, the actuating portion 227 is formed by a connecting hook 226 at the distal end of the spindle 220. In other embodiments, as shown in FIG17, the distal end of the spindle 220 is provided with a covering structure, which covers the shaft body of the spindle 220 or the outer periphery of the first connecting portion 221 to form a radially increasing structure, and the actuating portion 227 is formed by the covering structure.

[0123] Figures 11A to 14 are schematic diagrams illustrating the operation of the clamping device 10 according to some embodiments of this specification.

[0124] As shown in Figures 11A and 11B, after the clamping device 100 performs operations such as opening, clamping, and closing, the spindle 220 moves from the distal end to the proximal end until the mating part 150 of the clamping device 100 abuts against the limiting part 121 of the receiving tube 120, restricting the clamping piece 110 from continuing to move proximally. At this time, the first connecting part 221 is in an undeformed state, the second connecting part 130 mates with the first connecting part 222, and the blocking part 400 acts radially against the obstructed part 140, keeping the radial gap between the proximal end of the clamping piece 110 and the receiving tube 120 within a preset range.

[0125] As shown in Figures 12A and 12B, the spindle 220 continues to move from the distal end to the proximal end, generating a first force between the first connecting part 221 and the second connecting part 130. This first force causes the first connecting position 222 to deform, and the second connecting part 130 disengages from the first connecting position 222 and engages with the second connecting position 223. When the second connecting part 130 switches from the first connecting position 222 to the second connecting position 223, an axial relative displacement occurs between the first connecting part 221 and the second connecting part 130, thus triggering the release of the restraints on the blocking part 400 and the obstructed part 140, such as the proximal end of the clip 110 disengaging from the side wing 410. Then, the proximal end of the clip 110 deforms or displaces radially outward towards the side wall of the receiving tube 120, causing the locking part 125 and the locked part 115 to form a limiting engagement, and the clamp device 100 enters the locked state.

[0126] As shown in Figure 13, the spindle 220 continues to move from the distal end to the proximal end, causing a second force to be generated between the first connecting part 221 and the second connecting part 130. This second force causes the second connecting position 223 to deform, and the second connecting part 130 disengages from the second connecting position 223. At this time, the first connecting part 221 and the second connecting part 130 are disengaged, and the spindle 220 and the clamp 110 are released.

[0127] As shown in Figure 14, the spindle 220 continues to move from the distal end to the proximal end. The actuating part 227 at the distal end of the spindle 220 drives the connecting pin 230 to move from the distal end to the proximal end. The support arm 232 of the connecting pin 230 is deformed or displaced under force and disengages from the first limiting hole 124 of the storage tube 120 and the second limiting hole 211 of the sheath tube 210. At this time, the sheath tube 210 and the storage tube 120 are released.

[0128] This specification also provides another embodiment of the locked part 115 and the locking part 125 and their related structures, which can be used in combination with the structures of the various blocking parts 400 and the obstructed parts 140 provided in this specification, replacing the embodiments of FIG9-FIG.

[0129] Figure 23 is an exemplary structural diagram of the storage tube 120 according to some embodiments of this specification. Figure 24 is an exemplary structural diagram of the clip 110 according to some embodiments of this specification.

[0130] In some embodiments, the locking part 125 and the locked part 115 form a limiting engagement inside the receiving tube 120 to prevent the locked part 115 from protruding from the side wall of the receiving tube 120, making the structure more compact.

[0131] In some embodiments, the locking part 125 includes a second protrusion disposed on the side wall of the receiving tube 120 and protruding radially inward, and the locked part 115 includes second recesses respectively disposed on at least two clips 110. When the second recesses engage with the second protrusions, the clamping device 100 is locked. In some embodiments, the second protrusion may be similar in structure to the tube arm 420 described above, with at least two tube arms 420 respectively arranged corresponding to at least two clips 110. The distal end of the tube arm 420 is connected to the receiving tube 120, and the proximal end protrudes from the inner wall of the receiving tube 120. In some embodiments, the second recess may be similar in structure to the clearance part 116 described above. Since the obstructed part 140 of the clip 110 engages with the side wing 410 at the distal end of the spindle 220, the function of the tube arm 420 is solely as the locking part 125.

[0132] In some embodiments, at least two clips 110 are provided with locking holes 117, which form a first recess. The receiving tube 120 includes at least two tube arms 420, the distal ends of which are connected to the receiving tube, and the proximal ends protrude from the inner wall of the receiving tube 120. At least a portion of the tube arms 420 forms a second protrusion. The second recess is the locking hole 117 provided in the clip 110. The locking hole 117 changes its position radially within the receiving tube 120 as the obstructed portion 140 moves radially. When the obstructed portion 140 of the clip 110 is disengaged from the side wing 410, the proximal end of the clip 110 deforms or displaces radially outward, causing the locking hole 117 to move radially outward, so that the tube arm 420 extends into the locking hole 117 and engages with the locking hole 117, thereby locking the clip device 100. Understandably, when the length of the tube wall 420 is different, the entire tube wall 420 can be located inside the locking hole 117, in which case the entire arm of the tube arm 420 constitutes the second protrusion; or, the free end of the tube wall 420 can pass through the locking hole 117, in which case part of the arm of the tube arm 420 constitutes the second protrusion.

[0133] Figures 25 to 27C are schematic diagrams illustrating the operation of the clamping device 10 according to some embodiments of this specification.

[0134] As shown in Figure 25, the clamp device 100 is in the closed state. The spindle 220 moves from the distal end to the proximal end, causing the clamping piece 110 to close. The side wing 410 acts radially on the obstructed part 140, ensuring that the proximal end of the clamping piece 110 maintains a gap with the side wall of the receiving tube 120. During the movement of the spindle 220 towards the proximal end, the locking part 125 is in the suspended state.

[0135] As shown in Figure 26, the clamp device 100 is in a locked state. The spindle 220 continues to move from the distal end to the proximal end, generating a first force between the first connecting part 221 and the second connecting part 130. This first force causes the first connecting position 222 to deform, and the second connecting part 130 disengages from the first connecting position 222 and engages with the second connecting position 223. When the second connecting part 130 switches from the first connecting position 222 to the second connecting position 223, an axial relative displacement occurs between the first connecting part 221 and the second connecting part 130, thus triggering the release of the constraint of the side wing 410 and the obstructed part 140. Then, the proximal end of the clamp 110 deforms radially outward or displaces closer to the side wall of the receiving tube 120, so that the locking part 125 and the locked part 115 form a limiting engagement, and the clamp device 100 enters a locked state.

[0136] As shown in Figures 27A to 27C, the clamp device 100 is in the released state. The spindle 220 moves from the distal end to the proximal end, causing the first connecting part 221 to separate from the second connecting part 130. Simultaneously, the actuating part 227 at the distal end of the spindle 220 actuates the connecting pin 230 to disengage from the first limiting hole 124 and the second limiting hole 211, causing the sheath tube 210 and the receiving tube 120 to separate. At this time, the locking part 125 and the locked part 115 remain engaged, and the clamp device 100 remains in the locked state.

[0137] This specification also provides various blocking parts 400 and first connecting parts 221 and their related structures in the embodiments.

[0138] The following description, in conjunction with Figures 15-22B, will explain one type of blocking part 400 and first connecting part 221 and their related structures.

[0139] Figure 15 is an exemplary structural diagram of the distal structure of the clamping device 10 according to some embodiments of this specification. Figure 16 is an exemplary structural diagram of the receiving tube 120 according to some embodiments of this specification. Figure 17 is an exemplary structural diagram of the distal structure of the mandrel 220 according to some embodiments of this specification. Figure 18 is an exemplary structural diagram of the clamping piece 110 according to some embodiments of this specification.

[0140] As shown in Figures 15 to 18, in some embodiments, a blocking portion 400 is disposed within the receiving tube 120 and protrudes radially inward. The blocking portion 400 is configured to contact the obstructed portion 140 after at least two clips 110 are closed, forming a sliding constraint. Here, a sliding constraint refers to a constraint method where an object can only move in one specific direction (e.g., axial direction) and cannot move in other directions. During the movement of the clips 110 from the distal end to the proximal end, the blocking portion 400 acts on the obstructed portion 140, sliding relative to the obstructed portion 140, and causing the proximal end of the clips 110 to move radially closer, maintaining the gap with the sidewall of the receiving tube 120 within a preset range. By setting the blocking portion 400 and the obstructed portion 140 as sliding constraints, the clips 110 are constrained within a specific stroke range. This facilitates controlling the locking process of the clips 110 through their movement stroke, rather than relying on the force of the spindle 220, making operation simpler and more intuitive, and reducing the risk of misoperation.

[0141] In some embodiments, the clip 110 includes a clearance portion 116 located at the distal end of the obstructed portion 140. When the blocking portion 400 slides from the obstructed portion 140 to the clearance portion 116, the blocking portion 400 is released from the obstructed portion 140. At this time, the proximal end of the clip 110 deforms or displaces radially outward and forms a lock with the sidewall of the receiving tube 120.

[0142] In some embodiments, as shown in FIG18, at least two clips 110 include clearance portions 116 located at the distal end of the obstructed portion 140. When the blocking portion 400 slides from the obstructed portion 140 to the clearance portion 116, the blocking portion 400 is released from the obstructed portion 140. At this time, the proximal ends of at least two clips 110 deform or displace radially outward and form a lock with the sidewall of the receiving tube 120.

[0143] In some embodiments, the clearance portion 116 includes a hole or a groove. For example, the clearance portion 116 may be configured as a clearance groove or a clearance hole. The shape and size of the hole and groove match the shape and size of the blocking portion 400, such that when the blocking portion 400 slides from the blocked portion 140 to the clearance portion 116, the proximal end of the blocking portion 400 can slide into the clearance portion 116, thereby releasing the blocking portion 400 from the blocked portion 140.

[0144] In some embodiments, the blocking portion 400 includes at least two tubular arms 420, the distal ends of which are connected to the receiving tube 120, and the proximal ends protrude from the inner wall of the receiving tube 120. The proximal ends of the at least two tubular arms 420 constitute the blocking portion 400. When the clip 110 is closed, the tubular arms 420 slide into contact with the obstructed portion 140 of the clip 110. When the tubular arms 420 slide into the relief portion 116, the contact between the tubular arms 420 and the obstructed portion 140 is released, and the proximal end of the clip 110 moves radially outward, causing the tubular arms 420 to be inserted into the relief portion 116. The locked portion 115 at the proximal end of the clip 110 engages with the locking portion 125 on the side wall of the receiving tube 120 for a limiting engagement. Here, the tubular arms 420 and the relief portion 116 also form a limiting engagement, thereby enhancing the locking stability.

[0145] In some embodiments, the tube arms 420 include four, with two tube arms 420 respectively disposed at positions corresponding to each clamp 110. A channel is formed between the two tube arms 420 to allow the connecting shaft 131 to pass through, thus preventing the tube arms 420 from interfering with the movement of the connecting shaft 131. In some embodiments, the number of clearance portions 116 corresponds to the number of tube arms 420. For example, each clamp 110 is provided with two clearance portions 116, each clearance portion 116 is respectively disposed on both sides of the mounting position 114 and communicates with the mounting position 114 to reduce the size of the proximal end of the clamp 110.

[0146] In some embodiments, as shown in FIG17, the first connecting portion 221 may include only one connecting position 2211, which is adapted to the connecting shaft 131. When the clamping device 100 is locked, the spindle 220 continues to move from the distal end to the proximal end, causing the connecting shaft 131 to disengage from the connecting position 2211, and the spindle 220 and the clamping piece 110 are released.

[0147] In some embodiments, the distal end of the spindle 220 is provided with a radially enlarged actuating portion 227 for actuating the connecting pin 230 to move proximally, thereby releasing the receiving tube 120 and the sheath 210.

[0148] Figures 19 to 22B are schematic diagrams illustrating the operation of the clamping device 10 according to some embodiments of this specification.

[0149] As shown in Figure 19, the clamp device 100 is in the open state. The first connecting part 221 and the second connecting part 130 are connected, and the blocking part 400 and the obstructed part 140 are not yet in contact.

[0150] As shown in Figure 20, the clamp device 100 is in the closed state. The spindle 220 moves from the distal end to the proximal end, causing the clamping piece 110 to close. The proximal end of the clamping piece 110 moves to abut against the blocking part 400. The blocking part 400 acts radially on the obstructed part 140, maintaining a gap between the proximal end of the clamping piece 110 and the side wall of the receiving tube 120. During the movement of the spindle 220 towards the proximal end, the blocking part 400 forms a sliding constraint on the obstructed part 140.

[0151] As shown in Figure 21, the clamp device 100 is in a locked state. The spindle 220 moves from the distal end to the proximal end, causing the blocking part 400 to slide from the obstructed part 140 into the abutment part 116. The blocking part 400 and the obstructed part 140 are released from constraint. At this time, the proximal end of the clamp piece 110 deforms or displaces radially outward, so that the locked part 115 and the locking part 125 cooperate to form a lock on the side wall of the receiving tube 120. At the same time, the blocking part 400 and the abutment part 116 also form a locked state.

[0152] As shown in Figures 22A and 22B, the clamp device 100 is in the released state. The spindle 220 moves from the distal end to the proximal end, causing the first connecting part 221 to separate from the second connecting part 130. At the same time, the actuating part 227 at the distal end of the spindle 220 actuates the connecting pin 230 to disengage from the first limiting hole 124 and the second limiting hole 211, thereby separating the sheath tube 210 and the storage tube 120.

[0153] The following description, in conjunction with Figures 32A-36, will explain another type of first connecting part 221, second connecting part 130, blocking part 400 and their related structures.

[0154] FIG32A is an exemplary structural diagram of a first predetermined form of the first connecting portion 221 according to some embodiments of this specification. FIG32B is an exemplary structural diagram of a second predetermined form of the first connecting portion 221 according to some embodiments of this specification. FIG33 is an exemplary structural diagram of the clip 110 according to some embodiments of this specification.

[0155] As shown in Figures 32A to 33, in some embodiments, the first connecting portion 221 constitutes the blocking portion 400. The first connecting portion 221 includes at least two connecting hooks 226. The second connecting portion 130 is a connecting hole 132 provided in at least two clips 110. The proximal ends of the at least two clips 110 are located between the at least two connecting hooks 226. The at least two connecting hooks 226 act radially inward on the proximal ends of the clips 110.

[0156] The connecting hole 132 is disposed at the proximal end of the clamp 110, and the number of connecting hooks 226 is determined based on the number of clamps 110. In some embodiments, the connecting hook 226 includes an arm portion 2261 and a hook portion 2262, the proximal end of the arm portion 2261 being connected to the spindle 220, and the distal end being connected to the hook portion 2262.

[0157] In some embodiments, the hook portion 2262 of the connecting hook 226 includes a first limiting region 2263 and a second limiting region 2264. One end of the first limiting region 2263 is connected to the arm portion 2261, and the other end is connected to the second limiting region 2264. In some embodiments, a first barb 2265 is provided at the connection between the first limiting region 2263 and the second limiting region 2264, and a second barb 2266 is provided at the distal end of the second limiting region 2264.

[0158] In the unlocked state, at least two connecting hooks 226 are respectively aligned and engaged with the connecting holes 132 of at least two clips 110. For example, each of the at least two connecting hooks 226 is aligned and engaged with the corresponding connecting hole 132 in a first predetermined form, so that the first connecting part 221 and the second connecting part 130 are connected. The first predetermined form refers to the form of the connecting hook 226 without deformation. At this time, the first limiting area 2263 is engaged with the connecting hole 132, that is, the first limiting area 2263 of the connecting hook 226 passes through the connecting hole 132, and the first barb 2265 forms a limit with the connecting hole 132. In some embodiments, the first predetermined shape may be that the arms 2261 of at least two connecting hooks 226 come close to each other. At this time, the at least two connecting hooks 226 apply a radially inward force to at least two clips, so that the proximal ends of at least two clips 110 can maintain a preset gap with the inner wall of the receiving tube 120 (that is, the proximal ends of at least two clips 110 are located between at least two connecting hooks 226). The degree of bending of the hook 2262 relative to the arm 2261 satisfies the shape of the connecting hook 226 and the connecting hole 132 maintaining connection. For example, the hook 2262 and the arm 2261 are at an acute angle or a right angle.

[0159] In the locked state, when the spindle 220 moves from the distal end to the proximal end, and the connecting hook 226 undergoes its first deformation or displacement due to the first force, the connecting hook 226 deforms from the first predetermined form to the second predetermined form, and in the second predetermined form, it maintains a fit with the connecting hole 132, and causes the proximal end of the clamp 110 to deform or displace radially outward to fit with the receiving tube 120, and the clamp device 100 enters the locked state. The second predetermined form refers to the deformation of the arm portion 2261 and / or the first limiting area 2263. In this form, the angle between the arm portion 2261 and the axis of the spindle 220 increases, and the arms 2261 of at least two connecting hooks 226 move away from each other, allowing the proximal ends of at least two clips 110 to deform or displace radially outward to lock into the receiving tube 120. Furthermore, the degree of bending of the hook portion 2262 relative to the arm portion 2261 satisfies the requirement that the connecting hook 226 maintains connection with the connecting hole 132. For example, the angle between the hook portion 2262 and the arm portion 2261 is a right angle or an obtuse angle. In the second predetermined form, the second limiting area 2264 engages with the connecting hole 132, meaning the connecting hole 132 passes over the first barb 2265 and engages with the second limiting area 2264. The second barb 2266 and the connecting hole 132 form a limiting position.

[0160] In the released state, as the spindle 220 continues to move from the distal end to the proximal end, the connecting hook 226 undergoes a second deformation or displacement due to the second force. The connecting hook 226 then deforms from a second predetermined shape to a third predetermined shape, and in the second predetermined shape, it disengages from the connecting hole 132, releasing the first connecting portion 221 and the second connecting portion 130. The third predetermined shape refers to a shape where at least one of the arm portion 2261, the first limiting area 2263, and the second limiting area 2264 deforms. In this state, the angle between the hook portion 2262 and the arm portion 2261 increases, allowing the connecting hook 226 to disengage from the connecting hole 132. In the third predetermined shape, the connecting hole 132 passes the second barb 2266 and disengages from the second limiting area 2264.

[0161] In some embodiments, two connecting hooks 226 constitute a blocking portion 400, and the proximal ends of at least two clips 110 are located between the two connecting hooks 226. The two connecting hooks 226 act radially inward on the proximal ends of the clips 110. When the connecting hooks 226 are in a first predetermined configuration, they act radially inward on the blocked portion 140 of the clips 110, maintaining a predetermined gap between the proximal ends of the clips 110 and the receiving tube 120. When the connecting hooks 226 are in a second predetermined configuration, they release the radial restriction on the blocked portion 140, and the proximal ends of the clips 110 deform or displace radially outward, causing the locking portion 125 and the locked portion 115 to engage, locking the clamp device 100.

[0162] Figures 34 to 36 are schematic diagrams illustrating the operation of the clamping device 10 according to some embodiments of this specification.

[0163] As shown in Figure 34, the clamp device 100 is in an unlocked state. The connecting hook 226 is in a first predetermined state, and the connecting hook 226 is connected to the connecting hole 132 of the clamp piece 110. The connecting hook 226 acts radially inward on the obstructed part 140, so that the proximal end of the clamp piece 110 maintains a gap within a preset range with the inner wall of the receiving tube 120, so as to allow the spindle 220 to control the clamp piece 110 to repeatedly open or close.

[0164] As shown in Figure 35, the clamp is in a locked state. The spindle 220 moves from the distal end to the proximal end, causing the connecting hook 226 to abut against the limiting part 121 of the storage tube 120 (not shown in the figure). The limiting part 121 restricts the clamp piece 110 from continuing to move proximally. Continuing to pull the spindle 220, a first force is generated between the connecting hook 226 and the connecting hole 132. This first force causes the arm 2261 of the connecting hook 226 and / or the first limiting area 2263 to deform, giving the connecting hook 226 a second predetermined shape. The connecting hook 226 disengages from the obstructed part 140, and the proximal end of the clamp piece 110 deforms or displaces radially outward, causing the locking part 125 and the locked part 115 to engage, locking the clamp piece 110 to the storage tube 120.

[0165] As shown in Figure 36, the clamp device 100 is in the released state. The spindle 220 moves from the distal end to the proximal end, generating a second force between the connecting hook 226 and the connecting hole 132. This second force causes at least one of the arm 2261, the first limiting region 2263, and the second limiting region 2264 of the connecting hook 226 to deform, resulting in a third predetermined configuration. The connecting hook 226 is then disengaged from the connecting hole 132, and the spindle 220 is released from the clamp 110. In this third predetermined configuration, the connecting hook 226 also functions as an actuating part 227, actuating the connecting pin 230 to move proximally, thereby releasing the receiving tube 120 and the sheath tube 210.

[0166] The clamp device 10 of the embodiments of this specification may further be provided on the storage tube 120 with related structures that facilitate the opening and closing of at least two clamps 110.

[0167] Figure 37 is an exemplary structural diagram of the distal structure of the clamping device 10 according to some embodiments of this specification. Figure 38 is an exemplary structural diagram of the receiving tube 120 according to some embodiments of this specification.

[0168] As shown in Figures 37 and 38, in some embodiments, the receiving tube 120 includes two slots 126 respectively arranged corresponding to the clips 110. The slots 126 are located at the distal end of the receiving tube 120, and provide additional range of motion for the clips 110. By providing the slots 126, the angle of movement of the clips 110 is increased, giving the clips 110 a larger span in the open state, which is beneficial for clamping larger wounds or tissues.

[0169] In some embodiments, the distal end of the receiving tube 120 includes a limiting structure 127, which is used to restrict the clip 110 from dislodging from the distal end of the receiving tube 120. This may limit the range of motion of the clip 110. However, by providing the slot 126, the influence of the limiting structure 127 on the clip 110 is reduced, and the span of the clip 110 achieves the expected effect, meeting the surgical requirements.

[0170] Figure 39 is an exemplary structural diagram of the receiving tube 120 according to some embodiments of this specification. Figure 40 is an exemplary cross-sectional view of the distal structure of the clamping device 10 according to some embodiments of this specification.

[0171] In some embodiments, the storage tube 120 includes a limiting structure 127 disposed at its distal end, the limiting structure 127 being configured to restrict the movement of the clip 110 to the distal end when the clip 110 is opened, so as to prevent the clip 110 from dislodging from the distal end or overextending the storage tube 120.

[0172] In some embodiments, the limiting structure 127 is arranged at an angle relative to the axis of the receiving tube 120. For example, the preset angle η between the limiting structure 127 and the axis of the receiving tube 120 ranges from 40° to 90°; preferably, the preset angle η is approximately 60°. Thus, when the receiving tube 120 and the clip 110 are in the locked state, with the proximal end of the receiving tube 120 remaining unchanged to the distal end of the clip 110, the clip 110 has a greater range of motion in the position of the limiting structure 127, thereby increasing the span of the clip 110.

[0173] In the following sections, some other embodiments of the clamp device 10 will be described.

[0174] As shown in Figures 1 to 5, some embodiments of this specification also provide a clamp device 10, which includes a conveying device 200 and a clamping device 100. The conveying device 200 includes a sheath 210 and a spindle 220 disposed within the sheath 210, with a first connecting portion 221 at the distal end of the spindle 220; the clamping device 100 includes at least two clamping pieces 110, a receiving tube 120, and a second connecting portion 130, the second connecting portion 130 being connected to at least two clamping pieces 110, the receiving tube 120 being disposed at the distal end of the sheath 210, and the at least two clamping pieces 110 and the spindle 220 being releasably connected through the first connecting portion 221 and the second connecting portion 130, with at least two clamping devices 100 including an unlocked state, a locked state, and a released state. In the unlocked state, the first connecting part and the second connecting part form a first mating state, and at least two clips are axially movable at their proximal ends within the receiving tube. In the locked state, the first connecting part deforms or displaces due to a first force, and forms a second mating state with the second connecting part, with the proximal ends of at least two clips locked to the receiving tube. In the released state, the first connecting part deforms or displaces due to a second force, and is released from mating with the second connecting part, and the mandrel is released from mating with at least two clips. Further embodiments can be found in Figures 1 to 4 and their related descriptions, which will not be repeated here.

[0175] In the unlocked state, the first connecting portion 221 and the second connecting portion 130 form a first mating state, and at least two clips 110 are axially movable at their proximal ends within the receiving tube 120. In the locked state, the first connecting portion 221 deforms or displaces due to a first force and forms a second mating state with the second connecting portion 130, and at least two clips 110 are locked at their proximal ends to the receiving tube 120. The first and second mating states include, but are not limited to: different parts of the first connecting portion 221 mating with the second connecting portion 130, and / or the first connecting portion 221 mating with the second connecting portion 130 under different deformation states. In some embodiments, when the clamp device 100 is in the locked state, i.e., during the process of the first connecting portion 221 and the second connecting portion 130 transitioning to the second mating state, the blocking portion 400 and the obstructed portion 140 can be directly or indirectly triggered to release their constraints, and the proximal ends of the clips 110 deform radially outward to mat with the receiving tube 120.

[0176] In the released state, the first connecting part 221 deforms or shifts due to the second force and disengages from the second connecting part 130, and the spindle 220 disengages from at least two clips 110.

[0177] Figure 41A is a front view of the distal end structure of the mandrel 220 according to some embodiments of this specification. Figure 41B is a front view of the distal end structure of the mandrel 220 according to some embodiments of this specification.

[0178] As shown in Figures 5, 7, and 9, in some embodiments, the first connecting portion 221 includes a first connecting position 222 and a second connecting position 223, and the second connecting portion 130 includes a connecting shaft 131; in a first mating state, the first connecting position 222 and the connecting shaft 131 are connected; in a second mating state, the second connecting position 223 and the connecting shaft 131 are connected; when the second connecting position 223 is deformed or displaced due to a second force and is disengaged from the connecting shaft 131, the first connecting portion 221 and the second connecting portion 130 are released.

[0179] In some embodiments, the clamp device 100 is in a first mating state, with the first connection position 222 connected to the connecting shaft 131. The spindle 220 drives the connecting shaft 131 to move axially along the receiving tube 120 via the first connection portion 221.

[0180] In some embodiments, at least two clamping pieces 110 include mounting positions 114, a connecting shaft 131 is connected to at least two clamping pieces 110 at mounting positions 114, a spindle 220 includes a positioning portion 228, and a clamping device 100 includes a positioning mating portion 160. When the positioning portion 228 abuts against the positioning mating portion 160, the mounting position 114 is coaxial with the first connecting position 222.

[0181] In some embodiments, the mounting position 114 is movably engaged with the connecting shaft 131. The mounting position 114 is axially movable relative to the connecting shaft 131, allowing the proximal ends of the clamping pieces 110 to move closer or further apart radially relative to the receiving tube 120. Further details regarding the mounting position 114 can be found in the preceding description and will not be repeated here.

[0182] In some embodiments, as shown in Figures 41A and 41B, the first connection position 222 is located at the proximal end of the first connection portion 221 and is disposed on the central axis of the spindle 220, and the second connection position 223 is located at the distal end of the first connection portion 221 and is offset relative to the central axis of the spindle 220.

[0183] In some embodiments of this specification, when the connecting shaft 131 disengages from the first connecting position 222, it can accurately engage with the second connecting position 223, ensuring control precision. In some embodiments, the first connecting position 222 is located on the central axis of the spindle 220, meaning that the geometric center point of the first connecting position 222 is located on the central axis of the spindle 220; the second connecting position 223 is offset relative to the central axis of the spindle 220, meaning that the geometric center point of the second connecting position 223 is offset from the central axis of the spindle 220.

[0184] In some embodiments, as shown in Figures 41A-41B, the first connecting position is configured as a first limiting groove, and the second connecting position is configured as a second limiting groove; the range of the preset included angle γ between the opening direction of the first connecting position 222 and the opening direction of the second connecting position 223 includes 90° to 180°, wherein the opening direction refers to the line connecting the geometric center point of the first connecting position 222 (or the second connecting position 223) and the center point of the groove, and points outward from the first connecting position 222 (or the second connecting position 223).

[0185] In some embodiments, the preset included angle γ is approximately 125°.

[0186] In some embodiments, the preset angle θ between the opening direction of the first connection position 222 and the central axis of the mandrel 220 ranges from 40° to 90°. In some embodiments, the preset angle θ is approximately 55°.

[0187] In some embodiments of this specification, the first connecting part 222, after deformation, can automatically align with the second connecting part 223, ensuring that the connecting shaft 131 can accurately align with the second connecting part 223, achieving step-by-step control locking and release. The first connecting part 221 undergoes only elastic deformation without breaking, reducing fragmentation and improving surgical safety; moreover, the force value of the first connecting part 221 meets the target requirements, thereby ensuring safety and stability during operation; and, through optimized design, the axial dimension increase of the first connecting part 221 after deformation is minimized, and through unilateral force application, the first connecting part 221 can smoothly retract into the sheath 210 after final deformation. The preset angle θ between the opening direction of the first connecting part 222 and the central axis of the mandrel 220 is set in the range of 40° to 90°, which ensures that the connecting shaft 131 accurately aligns with the second connecting part 223 after disengaging from the first connecting part 222, while also reducing the risk of breakage of the first connecting part 222 and reducing fragmentation.

[0188] The opening size of the first limiting groove ranges from 0.1mm to 0.3mm. In some embodiments, the first connecting part 222 is configured to completely accommodate the connecting shaft 131. For example, the shape and size of the first connecting part 222 can be adapted to the cross-section of the connecting shaft 131 to ensure the connection stability of the first connecting part 221 and the second connecting part 130. In some embodiments, the opening size of the first connecting part 222 is smaller than the diameter of the connecting shaft 131 to prevent the connecting shaft 131 from dislodging from the undeformed first connecting part 222. In some embodiments, the opening size L1 of the first connecting part 222 ranges from 0.1mm to 0.3mm. In some embodiments, the opening size L1 of the first connecting part 222 can be approximately 0.2mm.

[0189] In some embodiments, the second connecting position 223 is configured to at least partially accommodate the connecting shaft 131. For example, the second connecting position 223 can completely accommodate the connecting shaft 131; or, the second connecting position 223 can only accommodate a portion of the connecting shaft 131. The second connecting position 223 mainly serves as a temporary obstruction for the connecting shaft 131, without requiring the connecting shaft 131 to be completely engaged in the second connecting position 223. Therefore, the overall size of the second connecting groove can be relatively small to reduce the radial dimension of the first connecting portion 221, allowing it to retract smoothly into the sheath 210 after deformation.

[0190] In some embodiments of this specification, the first limiting groove is configured to fully accommodate the connecting shaft 131, and the second limiting groove is configured to at least partially accommodate the connecting shaft 131, while limiting the opening size of the first limiting groove. This ensures the stability of the fit between the connecting shaft 131 and the first connecting position 222, and prevents the connecting shaft 131 from coming out of the opening of the first connecting position 222, which has not yet been deformed.

[0191] In some embodiments, as shown in Figures 41A-41B, the first connecting portion 221 includes a first deformation region, which is arranged corresponding to the first connecting position 222 and configured to deform under a first force. The first deformation region can be a portion that can deform around the first connecting position 222 when the first connecting position 222 is subjected to force.

[0192] In some embodiments, the first deformation region has a larger size than other regions surrounding the first connection 222. The maximum size L2 of the first deformation region ranges from 0.55 mm to 0.65 mm; in some embodiments, the maximum size L2 of the first deformation region is approximately 0.6 mm.

[0193] In some embodiments, the first connecting portion 221 includes a second deformation region, which is arranged corresponding to the second connecting position 223 and configured to deform under a second force. The second deformation region can be a portion that can deform around the second connecting position 223 when the second connecting position 223 is subjected to force.

[0194] In some embodiments, the second deformation region has a larger size than other regions surrounding the second connection position 223. The maximum size L3 of the second deformation region ranges from 0.35 mm to 0.45 mm. In some embodiments, the maximum size L3 of the second deformation region is approximately 0.4 mm.

[0195] As shown in Figure 8, in some embodiments, the thickness L4 of the first connecting portion 221 ranges from 0.15 mm to 0.3 mm. In some embodiments, the thickness L4 of the first connecting portion 221 is approximately 0.2 mm.

[0196] In some embodiments of this specification, by optimizing the structure and dimensions of the first connecting portion 221, and by optimizing the dimensions of the first deformation zone and the second deformation zone, the first and second forces can cause deformation in these areas within a reasonable range, which is beneficial for controlling the movement state of the connecting shaft 131. Simultaneously, the first and second deformation zones undergo reasonable deformation under predetermined forces, avoiding structural fracture due to excessive deformation, reducing fragmentation, and improving surgical safety.

[0197] In some embodiments, the first connecting part 222 deforms under a first force, and the second connecting part 223 deforms under a second force. The force of the first force is less than that of the second force. In this way, after the first connecting part 222 deforms and separates from the connecting shaft 131 under the first force, the spindle 220 only deforms and separates from the connecting shaft 131 after applying a larger second force. This is beneficial for controlling the deformation timing of the first connecting part 222 and the second connecting part 223 by applying different degrees of force, thereby improving control precision and accuracy.

[0198] In some embodiments, when the clamp device 100 is in an unlocked state, the second connecting portion 130 engages with the first connecting position 222, and the first connecting portion 221 is in an undeformed state.

[0199] When the spindle 220 moves from the distal end to the proximal end, the first connecting position 222 deforms or displaces due to the first force, disengaging from the connecting shaft 131, causing the second connecting position 223 to connect with the connecting shaft 131, and the clamp device 100 enters a locked state. Specifically, when the connecting shaft 131 moves to the limiting part 121 of the receiving tube 120, the connecting shaft 131 stops moving proximally. At this time, the spindle 220 continues to move proximally, causing the force between the first connecting position 222 and the connecting shaft 131 to reach the first force. This causes the first connecting position 222 to deform or displace, disengaging the connecting shaft 131 from the first connecting position 222 and engaging with the second connecting position 223. During the process of switching the connecting shaft 131 from the first connecting position 222 to the second connecting position 223, an axial relative displacement occurs between the first connecting part 221 and the second connecting part 130, which directly triggers the obstructed part 140 of the clip 110 to disengage from the side wing 410. The proximal end of the clip 110 deforms radially outward and locks with the storage tube 120.

[0200] As the spindle 220 continues to move from the distal end to the proximal end, the second connecting position 223 deforms or displaces due to the second force, thus disengaging from the connecting shaft 131, and the first connecting part 221 and the second connecting part 130 are released. Specifically, after the clamp device 100 is locked, if the spindle 220 continues to move from the distal end to the proximal end, and the connecting shaft 131 is blocked by the limiting part 121 and cannot continue to move proximal, then when the force between the second connecting position 223 and the connecting shaft 131 increases to the level of the second force, the second connecting position 223 deforms or displaces, causing the connecting shaft 131 to disengage from the second connecting position 223.

[0201] Figure 31A is an exemplary isometric view of the distal end structure of the mandrel 220 according to some embodiments of this specification. Figure 31B is an exemplary front view of the distal end structure of the mandrel 220 shown in Figure 31A. Figure 31C is an exemplary side view of the distal end structure of the mandrel 220 shown in Figure 31A.

[0202] As shown in Figures 31A to 31C, in some embodiments, the first connecting position 222 and the second connecting position 223 of the first connecting part 221 are both located on the central axis of the spindle 220, so that the interaction force between the first connecting part 221 and the second connecting part 130 is along the central axis of the spindle 220, which is more labor-saving and more stable.

[0203] In some embodiments, a guide channel 224 is formed between the first connecting position 222 and the second connecting position 223. The guide channel 224 is configured to guide the second connecting portion 130 into the second connecting position 223 after the first connecting position 222 is deformed. A release port 225 is formed at the distal end of the second connecting position 223. The release port 225 is configured to release the second connecting portion 130 after the second connecting position 223 is deformed. In this way, the movement of the connecting shaft 131 is sequentially along the first connecting position 222, the guide channel 224, and the second connecting position 223, and then disengages from the release port 225. The entire movement path is along the central axis of the spindle 220, reducing structural vibration and improving stability.

[0204] In some embodiments, the first connecting portion 221 has elastic deformation capability, so that the first connecting position 222 can return to its original shape after deformation, thereby ensuring the connection stability between the second connecting portion 130 and the second connecting position 223.

[0205] In some embodiments, the width of the guide channel 224 is smaller than the diameter of the connecting shaft 131; the width of the release port 225 is smaller than the diameter of the connecting shaft 131.

[0206] In some embodiments, the first connecting position 222 and / or the second connecting position 223 are slotted holes, and the diameter of the first connecting position 222 and / or the second connecting position 223 ranges from 0.5 mm to 0.6 mm; the width of the guide channel 224 ranges from 0.2 mm to 0.3 mm. The width of the guide channel 224 refers to the dimension perpendicular to the axis of the mandrel 220. The first connecting portion 221 is configured to have the above-mentioned dimensions, so that it deforms only under stress without breaking, reducing fragmentation and improving surgical safety.

[0207] In some embodiments, as shown in FIG42A, when the clamp device 100 is in an unlocked state, the second connecting part 130 engages with the first connecting part 222, and the first connecting part 221 is in an undeformed state.

[0208] In some embodiments, as shown in FIG42B, the spindle 220 moves from the distal end to the proximal end, and the second connecting portion 130 causes the first connecting portion 221 to undergo a first elastic deformation, causing the second connecting portion 130 to leave the first connecting position 222 and enter the guide channel 224.

[0209] In some embodiments, as shown in FIG42C, the mandrel 220 continues to move from the distal end to the proximal end, causing the second connecting portion 130 to enter the second connecting position 223. At this time, the first connecting portion 221 returns to its original shape, so that the second connecting position 223 engages with the second connecting portion 130. Next, the mandrel 220 continues to move from the distal end to the proximal end, and the second connecting portion 130 causes the release port 225 to deform, causing the second connecting portion 130 to disengage from the second connecting position 223, and the mandrel 220 and the clamp 110 are released.

[0210] In some embodiments, the first connecting portion 221 includes at least two connecting hooks 226, and the second connecting portion 130 is a connecting hole 132 disposed near the proximal end of each clip 110. In the unlocked state, at least two connecting hooks 226 engage with a plurality of connecting holes 132 in a first predetermined configuration.

[0211] In some embodiments, when the spindle 220 moves from the distal end to the proximal end, at least two connecting hooks 226 deform or displace due to a first force and engage with a plurality of connecting holes 132 in a second predetermined form, and the clamp device 100 enters a locked state. Specifically, when the connecting shaft 131 moves to the limiting portion 121 of the receiving tube 120, the connecting shaft 131 stops moving proximally. At this time, the spindle 220 continues to move proximally, causing the force between the first connecting position 222 and the connecting shaft 131 to reach the first force. At least two connecting hooks deform or displace, causing the connecting shaft 131 to disengage from the first connecting position 222 and engage with the second connecting position 223. During the process of switching the connecting shaft 131 from the first connecting position 222 to the second connecting position 223, an axial relative displacement occurs between the first connecting part 221 and the second connecting part 130, which directly triggers the obstructed part 140 of the clip 110 to disengage from the side wing 410. The proximal end of the clip 110 deforms radially outward and locks with the storage tube 120.

[0212] In some embodiments, as the mandrel 220 continues to move from the distal end to the proximal end, at least two connecting hooks 226 deform or displace due to a second force, disengaging from the plurality of connecting holes 132 in a third predetermined form, thereby releasing the first connecting portion 221 and the second connecting portion 130. Specifically, after the clamp device 100 is locked, if the mandrel 220 continues to move from the distal end to the proximal end, and the connecting shaft 131 is blocked by the limiting portion 121 and cannot continue to move proximal, then when the force between the second connecting position 223 and the connecting shaft 131 increases to the level of the second force, at least two connecting hooks 226 deform or displace, disengaging the connecting shaft 131 from the second connecting position 223. Further details regarding the connecting hooks 226 can be found in the preceding description and will not be repeated here.

[0213] In some embodiments, the force value of the first force is less than the force value of the second force.

[0214] In some embodiments, the force value of the first force ranges from 20N to 50N; further, the force value of the first force ranges from 37N to 47N. In some embodiments, the first force is approximately 42N.

[0215] In some embodiments, the force value of the second force ranges from 30N to 60N; further, the force value of the second force ranges from 45N to 55N. In some embodiments, the second force is approximately 50N.

[0216] In some embodiments of the specification, controlling the first force and the second force within the above-mentioned range enables the first connecting position 222 and the second connecting position 223 to undergo reasonable deformation, allowing the connecting shaft 131 to smoothly switch from the first connecting position 222 to the second connecting position 223, and reducing the risk of the first connecting part 221 breaking, thus avoiding the generation of fragments.

[0217] Understandably, in some embodiments, when the first connection bit 222 and the second connection bit 223 are spaced apart, the force values ​​of the first force and the second force can be of any magnitude relationship.

[0218] In some embodiments, when the first connection position 222 and the second connection position 223 are spaced apart, when the operating device 300 operates the spindle 220 to move proximally so that the second connection part 130 disengages from the first connection position 222, the resistance experienced by the spindle 220 will suddenly decrease, forming a first force feedback information and transmitting it to the operator. When the operator operates the spindle 220 to continue moving proximally so that the second connection part 130 connects with the second connection position 223, the resistance experienced by the spindle 220 will suddenly increase, forming a second force feedback information and transmitting it to the operator. At this time, when the operator applies a second force through the spindle 220, the second connection position 223 will deform or displace due to the second force.

[0219] In some embodiments, the first connecting portion 221 has at least one of the following material performance parameters: tensile strength greater than or equal to 520 MPa; yield strength greater than or equal to 205 MPa; elongation greater than or equal to 40%; and hardness less than or equal to 187 N / mm². Materials that achieve similar properties can be used as the material for the first connecting portion 221.

[0220] In some embodiments of this specification, the material properties and dimensional design of the first connecting part 221 complement each other, both of which can promote reasonable deformation of the deformation area and reduce the generation of fragments.

[0221] In some embodiments, the clamp device further includes a blocking portion 400, and the clamping pieces 110 include a blocked portion 140. In the unlocked state, the blocking portion 400 radially inwards constrains the blocked portion 140, and the radial gap between the proximal ends of at least two clamping pieces 110 and the receiving tube 120 is within a preset range. In the locked state, when the first connecting portion 221 and the second connecting portion 130 switch to the second mating state, the blocking portion 400 and the blocked portion 140 are directly or indirectly released from constraint, and the proximal ends of at least two clamping pieces 110 deform radially outwards to mate with the receiving tube 120. More details about the blocking portion 400 and the blocked portion 140 can be found in the full description, and will not be repeated here.

[0222] In some embodiments, the receiving tube 120 includes a locking portion 125, and at least two clips 110 include locked portions 115. After the blocking portion 400 and the obstructed portion 140 are released from constraint, the proximal ends of the at least two clips 110 deform radially outward, causing the locking portion 125 to engage with the locked portion 115. Further details regarding the locking portion and the locked portion can be found in the preceding descriptions and will not be repeated here.

[0223] In some embodiments, the clamp device further includes a connecting pin 230, through which the receiving tube 120 and the sheath 210 are releasably connected. The distal end of the spindle 220 includes an actuating part 227. After the clamp device 100 is locked, the spindle 220 moves from the distal end to the proximal end, and the actuating part 227 actuates the connecting pin 230 to deform and / or displace, thereby releasing the receiving tube 120 and the sheath 210. Further details regarding the actuating part 227 can be found in the preceding description and will not be repeated here.

[0224] In some embodiments of this specification, according to the clamp device 10 of the above-described scheme, the first connecting part 221 and the second connecting part 130 have a first engagement state. Under a first force, the first connecting part 221 and the second connecting part 130 switch to a second engagement state, and the clamp device 100 is locked. Under a second force, the first connecting part 221 and the second connecting part 130 are released. By using the first force and the second force to control the clamp device 100 to enter different states step by step, not only is the self-locking of the clamp device 100 reliably ensured, but the operation of the clamp device 100 is also made more precise and reliable, reducing misoperation and improving surgical safety.

[0225] Figure 43 is a flowchart of the operation method of the clamping device 10 according to some embodiments of this specification.

[0226] This specification provides a method for operating a clamping device 10, which includes a process 800 that can be executed by an operating device 300. The process 800 includes steps 810, 820, and 830.

[0227] In some embodiments, the clamping device 10 includes a conveying device 200, a clamping device 100, and a blocking portion 400. The conveying device 200 includes a spindle 220, and the distal end of the spindle 220 includes a first connecting portion 221. The clamping device 100 includes at least two clamping pieces 110, a receiving tube 120, and a second connecting portion 130. The second connecting portion 130 is connected to at least two clamping pieces 110, and the at least two clamping pieces 110 include a blocking portion 140.

[0228] In step 810, with the first connecting part connected to the second connecting part, the radial gap between the proximal end of the clip 110 and the receiving tube 120 is controlled within a preset range by the blocking part 400. The operating spindle 220 reciprocates along the channel of the sheath tube 210, causing the clip 110 to open or close. For more information on the preset range, please refer to the relevant content in Figures 2-4.

[0229] In some embodiments, when the first connecting part is connected to the second connecting part, the operating device 300 controls the radial gap between the proximal end of the clip 110 and the receiving tube 120 within a preset range by the blocking part 400, and the operating spindle 220 reciprocates along the channel of the sheath tube 210, thereby driving the clip 110 to open or close.

[0230] In some embodiments, the blocking part 400 is disposed at the distal end of the spindle 220, and the obstructed part 140 is pre-fitted to the blocking part 400. The operating device 300 operates the first connecting part 221 and the second connecting part 130 through the spindle 220, such that when the force between the first connecting part 221 and the second connecting part 130 is less than the first force, the blocking part 400 controls the radial gap between the proximal end of the clip 110 and the receiving tube 120 within a preset range.

[0231] In some embodiments, the blocking portion 400 includes two side wings 410 disposed at the distal end of the spindle 220. The two side wings 410 press the blocked portions 140 of the two clips 110 onto the first connecting portion 221, thereby creating a gap between the proximal end of the clips 110 and the inner wall of the receiving tube 120.

[0232] In some embodiments, the blocking portion 400 includes two connecting hooks 226 located at the distal end of the spindle 220. The two connecting hooks 226 bring together the blocked portions 140 of the two clips 110, thereby creating a gap between the proximal end of the clips 110 and the inner wall of the receiving tube 120.

[0233] In some embodiments, the blocking portion 400 is disposed within the receiving tube 120 and protrudes radially inward, and the distal end of the obstructed portion 140 is provided with a clearance hole 116. The operating device 300 operates the clearance hole 116 axially between the distal end of the receiving tube 120 and the blocking portion 400 via the spindle 220. In this way, the blocking portion 400 can act radially on the obstructed portion 140, thereby controlling the radial gap between the proximal end of the clamp 110 and the receiving tube 120 within a preset range.

[0234] In step 820, without releasing the connection between the first connecting part 221 and the second connecting part 130, the operating spindle 220 moves from the distal end to the proximal end, triggering the blocking part 400 and the obstructed part 140 to release the constraint, so that the proximal ends of at least two clips 110 deform or displace radially outward to cooperate with the receiving tube 120, and the clamping device 100 is locked.

[0235] In some embodiments, without releasing the connection between the first connecting part 221 and the second connecting part 130, the operating device 300 moves the mandrel 220 from the distal end to the proximal end. The first connecting part 222 deforms or displaces due to the first force, disengaging from the second connecting part 130, thereby connecting the second connecting part 223 and the second connecting part 130. During this process, the first connecting part 221 and the second connecting part 130 undergo axial relative displacement, triggering the release of the constraint between the blocking part 400 and the obstructed part 140. For example, the obstructed part 140 disengages from the side wing 410 at the distal end of the mandrel 220, or the tube arm 420 of the receiving tube 120 engages with the clearance hole 116, etc.

[0236] In some embodiments, the operating device 300 moves the mandrel 220 from the distal end to the proximal end, generating a first force between the connecting hook 226 and the connecting hole 132. This first force causes the first limiting region 2263 of the connecting hook 226 to deform, and the second limiting region 2264 of the connecting hook 226 engages with the connecting hole 132. Due to the deformation of the first limiting region 2263 of the connecting hook 226, the connecting hook 226 disengages from the obstructed portion 140.

[0237] In some embodiments, the receiving tube 120 includes a locking portion 125, and the clip 110 includes a locked portion 115. The operating device 300 operates the blocking portion 400 and the obstructed portion 140 to release the constraint, causing the proximal end of the clip 110 to deform or displace radially outward, thereby engaging the locking portion 125 with the locked portion 115. In some embodiments, the locking portion 125 includes a first recess on the sidewall of the receiving tube 120, and the locked portion 115 includes a first protrusion on the proximal end of the clip 110; the first recess and the first protrusion form a limiting engagement on the sidewall of the receiving tube 120. In some embodiments, the locking portion 125 includes a second protrusion on the sidewall of the receiving tube 120, and the locked portion 115 includes a second recess on the proximal end of the clip 110; the second protrusion and the second recess form a limiting engagement inside the receiving tube 120.

[0238] Step 830: The spindle 220 continues to move from the distal end to the proximal end, releasing the connection between the first connecting part 221 and the second connecting part 130, and releasing the connection between the clamp device 100 and the conveying device 200.

[0239] In some embodiments, the operating device 300 operates the spindle 220 to continue moving from the distal end to the proximal end, thereby releasing the connection between the first connecting portion 221 and the second connecting portion 130, and releasing the connection between the clamp device 100 and the conveying device 200.

[0240] In some embodiments, in the second engagement state, the operating device 300 operates the spindle 220 to continue moving towards the proximal end, applying a second force to cause the first limiting area 2264 to deform or displace due to the second force, thereby disengaging from the second connecting portion 130, and releasing the connection between the first connecting portion 221 and the second connecting portion 130.

[0241] In some embodiments, the clamp device 10 further includes a connecting pin 230, through which the receiving tube 120 and the sheath 210 are releasably connected, and the distal end of the spindle 220 includes an actuating portion 227. After the clamp device 100 is locked, the operating device 300 operates the spindle 220 to move from the distal end to the proximal end, and the actuating portion 227 actuates the connecting pin 230 to deform and / or displace, thereby releasing the receiving tube 120 and the sheath 210.

[0242] In some embodiments, the first connecting portion 221 includes a first connecting position 222 and a second connecting position 223, and the first mating state may be a state in which the first connecting position 222 is pre-maturing with the second connecting portion 130.

[0243] In some embodiments, when the first connecting portion 221 is connected to the second connecting portion 130, the operating device 300 controls the radial gap between the proximal ends of at least two clips 110 and the receiving tube 120 within a preset range via the blocking portion 400. This includes: controlling the first connecting portion 221 and the second connecting portion 130 to be in a first mating state, in which the second connecting portion 130 is connected to the first connecting position 222, and the blocking portion 400 controls the radial gap between the proximal ends of at least two clips 110 and the receiving tube 120 within a preset range; without releasing the connection between the first connecting portion 221 and the second connecting portion 130, the operating spindle 220 moves from the distal end to the proximal end, triggering the blocking portion 400 to release the constraint from the obstructed portion. This includes: controlling the first connecting portion 221 and the second connecting portion 130 to switch from the first mating state to the second mating state, in which the second connecting portion 130 is connected to the second connecting position 223, and the blocking portion 400 to release the constraint from the obstructed portion. For more details regarding the preset range, please refer to the relevant content in Figures 3 and 4.

[0244] In some embodiments, the first connection portion 221 includes a first connection bit 222 and a second connection bit 223.

[0245] In some embodiments, when the first connecting portion 221 is connected to the second connecting portion 130, the radial gap between the proximal ends of at least two clips 110 and the receiving tube 120 is controlled within a preset range by the blocking portion 400, including: the operating device 300 controls the first connecting portion 221 and the second connecting portion 130 to be in a first mating state, in which the second connecting portion 130 is connected to the first connecting position 222, and the blocking portion controls the radial gap between the proximal ends of at least two clips 110 and the receiving tube 120 within a preset range.

[0246] Without releasing the connection between the first connecting part 221 and the second connecting part 130, the operating device 300 operates the spindle 220 to move from the distal end to the proximal end, triggering the blocking part 400 and the obstructed part 140 to release the constraint. This includes: the operating device 300 controlling the first connecting part 221 and the second connecting part 130 to switch from a first mating state to a second mating state. In the second mating state, the second connecting part 130 is connected to the second connecting position 223, and the blocking part 400 and the obstructed part 140 are released from the constraint.

[0247] In some embodiments, controlling the first connecting portion 221 and the second connecting portion 130 to switch from a first mating state to a second mating state specifically includes: the operating device 300 operating the spindle 220 to move from the distal end to the proximal end, applying a first force to cause the first connecting position to deform or displace due to the first force, thereby disengaging from the second connecting portion 130; the operating spindle 220 continuing to move towards the proximal end, causing the second connecting portion 130 to connect with the second connecting position, and the first connecting portion 221 and the second connecting portion 130 switching from the first mating state to the second mating state.

[0248] In some embodiments, the operating spindle 220 continues to move from the distal end to the proximal end, thereby releasing the connection between the first connecting portion 221 and the second connecting portion 130. Specifically, in the second engagement state, the operating device 300 operates the spindle 220 to continue moving towards the proximal end, applying a second force to cause the second connecting position 223 to deform or displace due to the second force, thereby disengaging from the second connecting portion 130 and releasing the connection between the first connecting portion 221 and the second connecting portion 130.

[0249] In some embodiments, the first connecting portion 221 includes at least two connecting hooks 226, and the second connecting portion 130 is a connecting hole provided in at least two clips 110. The at least two connecting hooks 226 include a first limiting area 2263 and a first limiting area 2264. The first mating state can be the state in which the connecting hooks 226 are mated with the second connecting portion 130 when they are not deformed.

[0250] In some embodiments, when the first connecting portion 221 is connected to the second connecting portion 130, the radial gap between the proximal ends of at least two clips 110 and the receiving tube 120 is controlled within a preset range by the blocking portion 400, including: the operating device 300 controls the first connecting portion 221 and the second connecting portion 130 to be in a first mating state, in which the second connecting portion 130 is connected to the first limiting area 2263, and the blocking portion 400 controls the radial gap between the proximal ends of at least two clips 110 and the receiving tube within a preset range.

[0251] Without releasing the connection between the first connecting part 221 and the second connecting part 130, the operating spindle 220 moves from the distal end to the proximal end, triggering the blocking part 400 and the obstructed part 140 to release their constraints. This includes: the operating device 300 controlling the first connecting part 221 and the second connecting part 130 to switch from a first mating state to a second mating state. In the second mating state, the second connecting part 130 is connected to the first limiting area 2264, and the blocking part 400 and the obstructed part 140 are released from their constraints.

[0252] In some embodiments, controlling the first connecting portion 221 and the second connecting portion 130 to switch from a first mating state to a second mating state specifically includes: the operating device 300 operating the spindle 220 to move from the distal end to the proximal end, applying a first force to cause the first limiting area 2263 to deform or displace due to the first force, thereby disengaging from the second connecting portion 130; the operating spindle 220 continuing to move towards the proximal end, causing the second connecting portion 130 to connect with the first limiting area 2264, and the first connecting portion 221 and the second connecting portion 130 switching from the first mating state to the second mating state.

[0253] Figure 44 is a flowchart of another method of operation of the clamping device 10 according to some embodiments of this specification.

[0254] This specification provides another operating method for a clamping device 10, which includes a process 900 that can be executed by an operating device 300. The process 900 includes steps 910 and 920.

[0255] In some embodiments, the clamping device includes a conveying device and a clamping device. The conveying device includes a mandrel with a first connecting portion at its distal end, and the clamping device includes a second connecting portion. The first connecting portion and the second connecting portion form a first mating state.

[0256] Step 910: The operating spindle 220 moves from the distal end to the proximal end along the channel of the sheath tube 210, applying a first force to switch the first connecting part 221 and the second connecting part 130 from the first engagement state to the second engagement state, thereby switching the clamp device 100 from the unlocked state to the locked state.

[0257] In some embodiments, the operating device 300 operates the spindle 220 to move along the channel of the sheath tube 210 from the distal end to the proximal end, applying a first force to switch the first connecting portion 221 and the second connecting portion 130 from a first engaging state to a second engaging state, thereby switching the clamp device 100 from an unlocked state to a locked state.

[0258] In step 920, the operating spindle 220 continues to move from the distal end to the proximal end, applying a second force to release the first connecting part 221 and the second connecting part 130 from engagement, thereby releasing the connection between the clamp device 100 and the conveying device 200.

[0259] In some embodiments, the operating device 300 operates the spindle 220 to continue moving from the distal end to the proximal end, applying a second force to release the first connecting portion 221 and the second connecting portion 130 from engagement, thereby releasing the connection between the clamp device 100 and the conveying device 200.

[0260] When the clamping device 100 includes at least two clamping pieces 110, process 900 further includes step 930.

[0261] Step 930: In the first engagement state, the operating spindle 220 reciprocates along the axial direction, causing at least two clamping plates 110 to open or close.

[0262] In some embodiments, in the first engagement state, the operating device 300 operates the spindle 220 to reciprocate axially, causing at least two clamping plates 110 to open or close.

[0263] The beneficial effects that the embodiments of this application may bring include, but are not limited to:

[0264] (1) When the blocking part and the obstructed part are engaged, the two clamps can be opened or closed freely. When the blocking part and the obstructed part are disengaged, the proximal ends of the two clamps can be deformed or displaced radially outward and locked with the receiving tube. The entire locking process is caused by the automatic deformation of the proximal ends of the clamps, which reduces the locking operation.

[0265] (2) After the near end of the clip is engaged with the receiving tube, the receiving tube can restrict the axial and radial displacement of the near end of the clip, thereby improving the locking stability of the clip.

[0266] (3) The first connecting part and the second connecting part are connected before and during the locking of the clip. After the clip is locked, the first connecting part is released from the second connecting part, making the operation more precise and reliable, reducing the possibility of misoperation, and improving the safety of surgical operation.

[0267] (4) The blocking part and the obstructed part are released from the constraint by axial relative displacement. In this way, the release timing of the blocking part and the obstructed part can be precisely controlled by the axial movement of the mandrel. The operation is simple and quick, ensuring that the clamp device is accurately released when needed, thus improving the accuracy of the surgical operation.

[0268] (5) The pre-tightening part of the side wing is configured to provide a pre-tightening force to the proximal end of the clip, which presses the proximal end of the clip onto the first connecting part. When the clip moves axially in the unlocked state, it can prevent the proximal end of the clip from accidentally coming out of the gap between the side wing and the first connecting part, thus avoiding unexpected situations such as premature self-locking or locking failure of the clip.

[0269] (6) The structure and dimensions of the first connecting part are optimized, especially the dimensions of the first and second deformation zones, so that the first and second forces can cause these areas to deform within a reasonable range, which is beneficial to controlling the movement state of the connecting shaft. At the same time, the first and second deformation zones undergo reasonable deformation when subjected to a predetermined force, avoiding structural fracture caused by excessive deformation, reducing fragmentation, and improving surgical safety.

[0270] (7) By setting the blocking part and the obstructed part as sliding constraints, the clamping piece is constrained within a specific stroke range. This is beneficial to control the locking process of the clamping piece by the movement stroke of the clamping piece, rather than relying on the magnitude of the force of the spindle. This makes the operation simpler and more intuitive, and reduces the risk of misoperation.

[0271] (8) The locking part and the locked part form a limiting fit inside the storage tube to prevent the locked part from protruding from the side wall of the storage tube, making the structure more compact.

[0272] (9) Both the first and second connecting positions are located on the central axis of the mandrel. The entire movement path of the connecting shaft is along the central axis of the mandrel, which reduces structural vibration and improves stability.

[0273] (10) By setting the slot, the movement angle of the clip increases, so that the clip has a larger span when it is open, which is beneficial for clamping larger wounds or tissues.

[0274] (11) The limiting structure is arranged at an angle relative to the axis of the receiving tube. When the receiving tube and the clip are locked, the distance from the near end of the receiving tube to the far end of the clip remains unchanged. The clip has a greater range of motion in the position of the limiting structure, thereby increasing the span of the clip.

[0275] 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.

[0276] 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.

[0277] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine 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 a single embodiment disclosed above.

[0278] 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.

[0279] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A clamping device, characterized in that, include: A conveying device includes a sheath and a mandrel disposed within the sheath, the distal end of the mandrel including a first connecting portion; A clamping device includes at least two clamping plates, a storage tube, and a second connecting part. The second connecting part is connected to the at least two clamping plates. The storage tube is located at the distal end of the sheath. The proximal ends of the at least two clamping plates are axially movable within the storage tube. The at least two clamping plates include a blocking part. The at least two clamping plates and the mandrel are releasably connected through the first connecting part and the second connecting part. Blocking part; The clamping device includes an unlocked state, a locked state, and a released state: In the unlocked state, the blocking part constrains the obstructed part radially inward, the radial gap between the proximal ends of the at least two clips and the receiving tube is within a preset range, and the first connecting part is connected to the second connecting part; In the locked state, the blocking part and the obstructed part are released from constraint, the proximal ends of the at least two clips deform or displace radially outward to cooperate with the receiving tube, and the first connecting part is connected to the second connecting part; In the released state, the first connecting part is disconnected from the second connecting part.

2. The clamping device as described in claim 1, characterized in that, The blocking part is located at the distal end of the spindle.

3. The clamping device as described in claim 1 or 2, characterized in that, The blocking part and the obstructed part are released from constraint by axial relative displacement.

4. The clamping device as described in any one of claims 1-3, characterized in that, The storage tube includes a limiting part, and the clamp device includes a mating part. The at least two clamping pieces move from the distal end to the proximal end. When the mating part abuts against the limiting part, the limiting part restricts the movement of the at least two clamping pieces from the distal end to the proximal end. The spindle continues to move towards the proximal end, and the axial relative displacement between the blocking part and the obstructed part releases the constraint.

5. The clamping device as described in claim 4, characterized in that, The receiving tube includes radially inward protrusions that constitute the limiting portion.

6. The clamping device as described in claim 4 or 5, characterized in that, The clamping device includes a connecting shaft that extends radially through and is connected to the at least two clamping pieces, and at least one end of the connecting shaft constitutes the mating portion.

7. The clamping device according to any one of claims 1-6, characterized in that, The obstructed portion includes at least two elastic portions disposed near the proximal ends of the at least two clips.

8. The clamping device as described in claim 7, characterized in that, The blocking part includes at least two side wings, and the positions of the at least two side wings and the at least two elastic parts correspond one-to-one in the circumferential direction. The fixed ends of the two side wings are respectively connected to the mandrel, and the free ends of the two side wings form gaps with the mandrel.

9. The clamping device as described in claim 8, characterized in that, In the unlocked state, the obstructed portion is located within the gap.

10. The clamping device as described in claim 8, characterized in that, The side wing includes a body and a pre-tightening part. The proximal end of the body is fixed to the distal end of the mandrel, and the distal end of the body is connected to the pre-tightening part. The pre-tightening part is configured to provide a pre-tightening force to the proximal end of the corresponding clamp piece, and the pre-tightening force causes a first preset angle to be formed between the proximal end of the corresponding clamp piece and the first connecting part.

11. The clamping device as claimed in any one of claims 1, characterized in that, The blocking part is located inside the receiving tube and protrudes radially inward. After the at least two clips are closed, the blocking part contacts the obstructed part to form a sliding constraint.

12. The clamping device as described in claim 11, characterized in that, The at least two clips include a clearance portion located at the distal end of the obstructed portion. When the blocking portion slides from the obstructed portion to the clearance portion, the blocking portion is released from the obstructed portion.

13. The clamping device as described in claim 12, characterized in that, The clearance portion includes a hole or a groove.

14. The clamping device as described in any one of claims 11-13, characterized in that, The receiving tube includes at least two tube arms, the distal ends of the at least two tube arms are connected to the receiving tube, and the proximal ends protrude from the inner wall of the receiving tube. The proximal ends of at least the at least two tube arms constitute the blocking portion.

15. The clamping device according to any one of claims 1-14, characterized in that, The storage tube includes a locking part, and the at least two clips include locked parts. After the blocking part and the obstructed part are released from constraint, the proximal ends of the at least two clips deform or displace radially outward, and the locking part cooperates with the locked part.

16. The clamping device as described in claim 15, characterized in that, The locking part and the locked part form a limiting fit on the side wall of the storage tube; The locking part includes a first recess on the side wall of the storage tube, and the locked part includes a first protrusion on the proximal end of the at least two clips and protruding outward in a radial direction; When the first recess engages with the first protrusion, the clamping device is locked.

17. The clamping device as described in claim 15, characterized in that, The locking part and the locked part form a limiting fit inside the storage tube; The locking part includes a second protrusion disposed on the side wall of the receiving tube and protruding inward in a radial direction, and the locked part includes a second recess disposed on each of the at least two clips; When the second recess engages with the second protrusion, the clamping device is locked.

18. The clamping device as described in claim 17, characterized in that, The at least two clips are provided with locking holes, which form the first recess. The receiving tube includes at least two tube arms, the distal ends of which are connected to the receiving tube, and the proximal ends protrude from the inner wall of the receiving tube. At least a portion of the at least two tube arms forms the second protrusion.

19. The clamping device according to any one of claims 1-18, characterized in that, The first connecting part includes a first connecting bit and a second connecting bit. In the unlocked state, the first connecting bit and the second connecting part are connected. When the mandrel moves from the distal end to the proximal end, the first connecting position deforms or displaces due to the first force, thus disengaging from the second connecting part, thereby connecting the second connecting position and the second connecting part. The blocking part and the obstructed part undergo axial relative displacement, thus releasing the constraint. As the mandrel continues to move from the distal end to the proximal end, the second connecting position deforms or shifts due to the second force, thus disengaging from the second connecting part, and the first connecting part and the second connecting part are released.

20. The clamping device as described in claim 19, characterized in that, The at least two clamping pieces include an assembly position, the second connecting portion is connected to the at least two clamping pieces at the assembly position, the mandrel includes a positioning portion, the clamping device includes a positioning mating portion, and when the positioning portion abuts against the positioning mating portion, the assembly position is coaxial with the first connecting position.

21. The clamping device according to any one of claims 1-20, characterized in that, The storage tube includes two slots respectively corresponding to the clips, the slots being located at the distal end of the storage tube, the slots providing additional range of motion for the clips; and / or, The storage tube includes a limiting structure at its distal end, the limiting structure being configured to restrict the movement of the clip to the distal end when the clip is opened; the preset angle between the limiting structure and the axis of the storage tube ranges from 40° to 90°.

22. The clamping device according to any one of claims 1-21, characterized in that, The clamp device also includes a connecting pin, the receiving tube and the sheath are releasably connected by the connecting pin, and the distal end of the spindle includes an actuating part; After the clamp device is locked, the spindle moves from the distal end to the proximal end, and the actuating part causes the connecting pin to deform and / or displace, thereby releasing the storage tube and the sheath tube.

23. The clamping device according to any one of claims 1-22, characterized in that, The first connecting portion is located between the at least two clips.

24. The clamping device according to any one of claims 1-22, characterized in that, The first connecting portion constitutes the blocking portion, and the first connecting portion includes at least two connecting hooks. The second connecting portion is a connecting hole provided in the at least two clips. The proximal ends of the at least two clips are located between the at least two connecting hooks, and the at least two connecting hooks act radially inward on the proximal ends of the clips.

25. The clamping device as described in claim 24, characterized in that, In the unlocked state, the at least two connecting hooks are aligned and engaged with the connecting holes of the at least two clips, and the first connecting part and the second connecting part are connected. In the locked state, when the connecting hook undergoes its first deformation or displacement due to the first force, the connecting hook remains engaged with the connecting hole, and the proximal end of the clip deforms or displaces radially outward to engage with the receiving tube. In the released state, when the connecting hook undergoes a second deformation or displacement due to the second force, the connecting hook is disengaged from the connecting hole, and the first connecting part and the second connecting part are released.

26. The clamping device as described in claim 24, characterized in that, The at least two connecting hooks include a first limiting area and a second limiting area; In the unlocked state, the first limiting area engages with the connecting hole; In the locked state, the second limiting area engages with the connecting hole.

27. A clamping device, characterized in that, include: A conveying device includes a sheath and a mandrel disposed within the sheath, the distal end of the mandrel including a first connecting portion; A clamping device includes at least two clamping plates, a storage tube, and a second connecting part. The second connecting part is connected to the at least two clamping plates. The storage tube is located at the distal end of the sheath. The at least two clamping plates and the mandrel are releasably connected through the first connecting part and the second connecting part. The at least two clamping devices include an unlocked state, a locked state, and a released state. In the unlocked state, the first connecting part and the second connecting part form a first mating state, and the proximal ends of the at least two clips are axially movable inside the receiving tube; In the locked state, the first connecting part deforms or displaces due to the first force, and forms a second mating state with the second connecting part, and the proximal ends of the at least two clips are locked with the storage tube; In the released state, the first connecting part deforms or displaces due to the second force and is disengaged from the second connecting part, and the mandrel is disengaged from the at least two clamps.

28. The clamping device as described in claim 27, characterized in that, The first connecting part includes a first connecting position and a second connecting position, and the second connecting part includes a connecting shaft; In the first mating state, the first connection position and the connection shaft are connected; In the second mating state, the second connection position is connected to the connection shaft; When the second connecting part deforms or shifts due to the second force and disengages from the connecting shaft, the first connecting part and the second connecting part are released.

29. The clamping device as described in claim 28, characterized in that, The first connection position is located at the proximal end of the first connection portion and is disposed on the central axis of the mandrel, and the second connection position is located at the distal end of the first connection portion and is offset relative to the central axis of the mandrel.

30. The clamping device as described in claim 27 or 28, characterized in that, The at least two clamping pieces include an assembly position, the connecting shaft is connected to the at least two clamping pieces at the assembly position, the mandrel includes a positioning part, the clamping device includes a positioning mating part, and when the positioning part abuts against the positioning mating part, the assembly position is coaxial with the first connecting position.

31. The clamping device as described in any one of claims 28-30, characterized in that, The first connecting position is configured as a first limiting groove, the second connecting position is configured as a second limiting groove, and the preset angle between the opening direction of the first limiting groove and the opening direction of the second limiting groove ranges from 90° to 180°. The preset angle between the opening direction of the first limiting groove and the central axis of the mandrel ranges from 40° to 90°.

32. The clamping device as described in claim 31, characterized in that, The first limiting groove is configured to fully accommodate the connecting shaft, and the second limiting groove is configured to at least partially accommodate the connecting shaft; The opening size of the first limiting groove is smaller than the diameter of the connecting shaft; The opening size of the first limiting groove ranges from 0.1mm to 0.3mm.

33. The clamping device as described in claim 31, characterized in that, The first connecting portion includes a first deformation zone, which is arranged corresponding to the first limiting groove and is configured to deform under the first force. The maximum size of the first deformation zone ranges from 0.55mm to 0.65mm. The first connecting portion includes a second deformation zone, which is arranged corresponding to the second limiting groove and is configured to deform under the second force. The maximum size of the second deformation zone ranges from 0.35mm to 0.45mm.

34. The clamping device as described in claim 28, characterized in that, Both the first connection position and the second connection position are located on the central axis of the mandrel.

35. The clamping device as described in claim 34, characterized in that, A guide channel is provided between the first connecting position and the second connecting position, and the guide channel is configured to guide the second connecting part into the second connecting position after the first connecting position is deformed; The distal end of the second connection position is provided with a release port, which is configured to release the second connection part after the second limiting groove is deformed.

36. The clamping device as described in claim 35, characterized in that, The first connection position and / or the second connection position are configured as a hole-shaped groove, and the diameter of the first connection position and / or the second connection position ranges from 0.5 mm to 0.6 mm; the width of the guide channel ranges from 0.2 mm to 0.3 mm.

37. The clamping device as described in claim 27, characterized in that, The first connecting part includes at least two connecting hooks, and the second connecting part is a connecting hole provided at the proximal end of each clip; In the unlocked state, the at least two connecting hooks engage with the plurality of connecting holes in a first predetermined configuration; When the mandrel moves from the distal end to the proximal end, the at least two connecting hooks deform or shift due to the first force and engage with the plurality of connecting holes in a second predetermined form, and the clamp device enters a locked state. As the mandrel continues to move from the distal end to the proximal end, the at least two connecting hooks deform or shift due to the second force, and disengage from the plurality of connecting holes in a third predetermined form, thereby releasing the first connecting part and the second connecting part.

38. The clamping device as described in claim 27, characterized in that, The force value of the first force is less than the force value of the second force; The force value of the first force ranges from 20N to 50N; The force value range of the second force is 30N to 60N.

39. The clamping device as described in claim 27, characterized in that, The first connecting part has at least one of the following material property parameters: Tensile strength greater than or equal to 520 MPa; Yield strength greater than or equal to 205 MPa; Elongation greater than or equal to 40%; Hardness less than or equal to 187 N / mm 2 .

40. The clamping device as claimed in claim 27, characterized in that, The clamping device further includes a blocking part, and the clamping piece includes a blocked part; In the unlocked state, the blocking part constrains the obstructed part radially inward, and the radial gap between the proximal ends of the at least two clips and the receiving tube is within a preset range; In the locked state, when the first connecting part and the second connecting part switch to the second mating state, the blocking part and the obstructed part are directly or indirectly triggered to release the constraint, and the proximal ends of the at least two clips deform radially outward to mate with the receiving tube.

41. The clamping device as described in claim 40, characterized in that, The storage tube includes a locking part, and the at least two clips include locked parts. After the blocking part and the obstructed part are released from constraint, the proximal ends of the at least two clips deform radially outward so that the locking part and the locked part cooperate.

42. The clamping device as described in claim 27, characterized in that, The clamp device also includes a connecting pin, the receiving tube and the sheath are releasably connected by the connecting pin, and the distal end of the spindle includes an actuating part; After the clamp device is locked, the spindle moves from the distal end to the proximal end, and the actuating part causes the connecting pin to deform and / or displace, thereby releasing the storage tube and the sheath tube.

43. A method for operating a clamping device, characterized in that, The clamping device includes a conveying device, a clamping assembly, and a blocking part. The conveying device includes a mandrel, the distal end of which includes a first connecting part. The clamping assembly includes at least two clamping plates, a receiving tube, and a second connecting part. The second connecting part is connected to the at least two clamping plates, and the at least two clamping plates include a blocking part. The operating method includes: When the first connecting part is connected to the second connecting part, the radial gap between the proximal ends of the at least two clips and the receiving tube is controlled within a preset range by the blocking part; Without releasing the connection between the first connecting part and the second connecting part, the spindle is moved from the distal end to the proximal end, triggering the blocking part and the obstructed part to release their constraints, causing the proximal ends of at least two clips to deform or displace radially outward to engage with the receiving tube, and the clip device is locked. The spindle is operated to continue moving from the distal end to the proximal end, thereby releasing the connection between the first connecting part and the second connecting part, and releasing the connection between the clamp device and the conveying device.

44. The method as described in claim 43, characterized in that, The first connecting portion includes a first connecting bit and a second connecting bit; When the first connecting part and the second connecting part are connected, controlling the radial gap between the proximal ends of the at least two clips and the receiving tube within a preset range by means of the blocking part includes: The first connecting part and the second connecting part are controlled to be in a first mating state. In the first mating state, the second connecting part is connected to the first connecting part, and the blocking part controls the radial gap between the proximal ends of the at least two clips and the receiving tube within a preset range. The step of moving the spindle from the distal end to the proximal end without releasing the connection between the first connecting part and the second connecting part, thereby triggering the release of the constraint between the blocking part and the obstructed part, includes: The control switches the first connecting part and the second connecting part from a first mating state to a second mating state. In the second mating state, the second connecting part is connected to the second connecting position, and the blocking part and the obstructed part are released from constraint.

45. The method as described in claim 44, characterized in that, Controlling the first connecting part and the second connecting part to switch from a first mating state to a second mating state includes: The spindle is moved from the distal end to the proximal end, and a first force is applied to cause the first connecting part to deform or displace due to the first force, thereby disengaging it from the second connecting part. The spindle continues to move towards the proximal end, causing the second connecting part to connect with the second connecting position, and the first connecting part and the second connecting part switch from the first mating state to the second mating state.

46. ​​The method as described in claim 45, characterized in that, The operation of moving the mandrel from the distal end to the proximal end to release the connection between the first connecting part and the second connecting part includes: In the second engagement state, the mandrel continues to move towards the proximal end, and a second force is applied to cause the second connection position to deform or displace due to the second force, thereby disengaging from the second connection part, and releasing the connection between the first connection part and the second connection part.

47. The method as described in claim 43, characterized in that, The first connecting part includes at least two connecting hooks, and the second connecting part is a connecting hole provided in the at least two clips. The at least two connecting hooks include a first limiting area and a second limiting area. When the first connecting part and the second connecting part are connected, controlling the radial gap between the proximal ends of the at least two clips and the receiving tube within a preset range by means of the blocking part includes: The first connecting part and the second connecting part are controlled to be in a first engagement state. In the first engagement state, the second connecting part is connected to the first limiting area. The blocking part controls the radial gap between the proximal ends of the at least two clips and the receiving tube within a preset range. The step of moving the spindle from the distal end to the proximal end without releasing the connection between the first connecting part and the second connecting part, thereby triggering the release of the constraint between the blocking part and the obstructed part, includes: The control switches the first connecting part and the second connecting part from a first mating state to a second mating state. In the second mating state, the second connecting part is connected to the second limiting area, and the blocking part and the obstructed part are released from constraint.

48. The method as described in claim 47, characterized in that, Controlling the first connecting part and the second connecting part to switch from a first mating state to a second mating state includes: The spindle is moved from the distal end to the proximal end, and a first force is applied to cause the first limiting area to deform or displace due to the first force, thereby disengaging it from the second connecting part. The spindle continues to move towards the proximal end, causing the second connecting part to connect with the second limiting area, and the first connecting part and the second connecting part switch from the first mating state to the second mating state.

49. The method as described in claim 45, characterized in that, The operation of moving the mandrel from the distal end to the proximal end to release the connection between the first connecting part and the second connecting part includes: In the second engagement state, the mandrel continues to move towards the proximal end, and a second force is applied to cause the second limiting area to deform or displace due to the second force, thereby disengaging from the second connecting part, and releasing the connection between the first connecting part and the second connecting part.

50. A method for operating a clamping device, characterized in that, The clamping device includes a conveying device and a clamping device. The conveying device includes a mandrel, the distal end of which includes a first connecting portion. The clamping device includes a second connecting portion. The first connecting portion and the second connecting portion form a first mating state. The operating method includes: The spindle is moved from the distal end to the proximal end, and a first force is applied to switch the first connecting part and the second connecting part from the first engagement state to the second engagement state, thereby switching the clamp device from the unlocked state to the locked state. The spindle is operated to continue moving from the distal end to the proximal end, and a second force is applied to disengage the first connecting part and the second connecting part, thereby releasing the connection between the clamp device and the conveying device.

51. The method as described in claim 50, characterized in that, The clamping device includes at least two clamping plates, and the method further includes: In the first engagement state, the spindle is operated to reciprocate along the axial direction, causing the at least two clamping plates to open or close.

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