Occluder, occluder locking system and locking method

Abstract

The occluder provided by the present invention includes a first occluding part and a second occluding part. The distal end of the first occluding part is provided with a connecting bolt along the direction of the second occluding part, the side wall of the connecting bolt is provided with a first external thread, the proximal end of the second occluding part is provided with a protrusion, the protrusion is provided with a through hole, the side wall of the protrusion is provided with a second external thread, the thread direction of the first external thread is opposite to the thread direction of the second external thread, and the proximal end of the connecting bolt can pass through the through hole and be screwed to the nut. The present invention also provides an occluder locking system and a locking method thereof. This structure of the occluder design of the present invention can achieve efficient, stable and reliable locking under the combined action of the pushing device, thereby improving the service life and occluding effect of the occluder, reducing the risk of postoperative complications, and is particularly suitable for the occlusion treatment of aortic dissection rupture.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an occluder, an occluder locking system for conveying the occluder, and a locking method of the occluder locking system. Background Art

[0002] The delivery system of an intraluminal occluder (such as a left atrial appendage occluder, a vascular plug, a filter, etc.) usually includes several parts such as a delivery sheath device, an expansion device, a loading device, and a pushing device. The delivery sheath device and the expansion device first establish a channel, and then the expansion device is withdrawn. The occluder is placed in the loading device through the pushing device, and then the delivery sheath device and the loading device are connected. The occluder is introduced into the delivery sheath through the pushing device until the occluder is delivered to the target position. With the development of catheter interventional therapy, various intraluminal occluders have been developed. However, the existing intraluminal occluders generally have problems such as poor reliability and simplicity during the locking process after being released by the delivery device, which may affect the service life and blocking effect of the occluder and increase the risk of complications. Summary of the Invention

[0003] In view of the defects of the prior art, the present invention provides an occluder, an occluder locking system and a locking method of the occluder locking system, which have high locking reliability and are simple and convenient to operate.

[0004] In order to solve the above technical problems, the present invention provides an occluder including a first sealing part and a second sealing part, the distal end of the first sealing part is provided with a connecting bolt along the direction of the second sealing part, the side wall of the connecting bolt is provided with a first external thread, the proximal end of the second sealing part is provided with a protrusion, the protrusion has a through hole, the side wall of the protrusion is provided with a second external thread, the thread direction of the first external thread is opposite to the thread direction of the second external thread, and the proximal end of the connecting bolt can pass through the through hole and be screwed to a nut.

[0005] The present invention also provides an occluder locking system, which includes an occluder and a pushing device, the pushing device including a first control component, a second control component and a pushing component, the pushing component including a pushing tube and the pushing member sleeved in the pushing tube, the inner wall of the distal end of the pushing tube is provided with a second internal thread which can be matched and connected with the second external thread, the first control component can drive the pushing member to slide back and forth to drive the proximal end of the connecting bolt detachably connected to the pushing member to abut or move away from a nut, the first control component can drive the pushing tube to rotate, and the second control component can drive the pushing tube to rotate, and the tightening direction of the first external thread and the nut is opposite to the tightening direction of the protrusion and the pushing tube.

[0006] The present invention also provides a locking method for an occluder locking system, comprising a locking pre-processing, a locking process, and a locking post-processing; wherein the locking pre-processing comprises:

[0007] Provided are an occluder, a pushing device, and a sheath tube bending device. The occluder includes a nut and a first blocking portion and a second blocking portion connected to each other. The distal end of the first blocking portion is provided with a connecting bolt, and the proximal end of the second blocking portion is provided with a protrusion. The pushing device includes a pushing tube and a pushing member. The sheath tube bending device includes a sheath tube.

[0008] Engage the nut with the distal end of the pushing tube, thread the connecting bolt with the pushing member, and thread the protruding portion with the pushing tube, drive the pushing member to stretch the occluder, place it in the sheath, and release the occluder;

[0009] The locking process includes:

[0010] driving the pushing member to make the connecting bolt abut against the nut;

[0011] The pushing tube is rotated to threadably connect the connecting bolt and the nut, while the pushing tube and the occluder are separated, and the proximal end of the connecting bolt is exposed from the nut.

[0012] The occluder provided by the present invention includes a nut, a first sealing part and a second sealing part. The first sealing part is provided with a connecting bolt, and the side wall of the connecting bolt is provided with a first external thread. The second sealing part is provided with a protrusion, and the protrusion is provided with a through hole. The side wall of the protrusion is provided with a second external thread. The thread direction of the first external thread is opposite to the thread direction of the second external thread. The proximal end of the connecting bolt can pass through the through hole and be screwed to the nut. The occluder of the present invention can be used in conjunction with a pushing device provided with a pushing piece and a pushing tube to achieve locking. Specifically, the pushing piece can be detachably connected to the connecting bolt, and the inner wall of the pushing tube is provided with an internal thread connected to the protrusion and can accommodate a nut. The pushing device can control the sliding and rotation of the pushing piece, and the pushing device can control the rotation of the pushing tube. Since the thread direction of the first external thread is opposite to the thread direction of the second external thread, the pushing tube is rotated to thread the connecting bolt and the nut and lock them, and the pushing tube and the protrusion can be separated at the same time. Therefore, this structure designed in the occluder of the present invention can achieve efficient, stable and reliable locking under the joint action of the pushing device, thereby improving the service life and blocking effect of the occluder, reducing the risk of postoperative complications, and is particularly suitable for the blocking treatment of aortic dissection rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the implementation. Obviously, the drawings described below are some implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a structural diagram of the occluder locking system provided by the first embodiment of the present invention.

[0015] Figure 2 yes Figure 1 Schematic diagram of the structure of the occluder with the occluder locking system.

[0016] Figure 3 yes Figure 2 Schematic cross-sectional view along line III-III.

[0017] Figure 4 yes Figure 1 Schematic diagram of the exploded view of the pushing component of the pushing device of the occluder locking system.

[0018] Figure 5 yes Figure 4 Schematic diagram of the distal end face structure of the push tube in the push assembly.

[0019] Figure 6 yes Figure 4 Schematic cross-sectional view along line VI-VI.

[0020] Figure 7 yes Figure 4 Schematic cross-sectional view of the push member after it is inserted into the push tube.

[0021] Figure 8 yes Figure 1 Schematic diagram of the structure of the sheath tube adjustable bending device.

[0022] Figure 9 yes Figure 8 Schematic cross-sectional view along line IX-IX.

[0023] Figure 10 yes Figure 8 Schematic diagram of the three-dimensional structure of the first shell.

[0024] Figure 11 yes Figure 10 Schematic diagram of the planar structure of the first shell.

[0025] Figure 12 yes Figure 8 Schematic diagram of the three-dimensional structure of the second shell.

[0026] Figure 13 yes Figure 12 Schematic diagram of the planar structure of the second shell.

[0027] Figure 14 yes Figure 8 Schematic diagram of the exploded structure of the distal cap.

[0028] Figure 15 yes Figure 14 Schematic diagram of the three-dimensional structure of the distal end cap of the sleeve.

[0029] Figure 16 yes Figure 14 Schematic cross-sectional view along line XVI-XVI in .

[0030] Figure 17 yes Figure 8 Schematic diagram of the three-dimensional structure of the positioning tube.

[0031] Figure 18 yes Figure 17 Schematic cross-sectional view of the positioning tube in FIG.

[0032] Figure 19 yes Figure 8 Schematic diagram of the three-dimensional structure of the proximal cap.

[0033] Figure 20 yes Figure 19 Schematic cross-sectional view of the proximal cap in FIG.

[0034] Figure 21 yes Figure 8 Schematic diagram of the three-dimensional decomposition structure of the adjusting part and the driving part of the adjusting mechanism.

[0035] Figure 22 yes Figure 21 Schematic diagram of another perspective of the adjustment part.

[0036] Figure 23 yes Figure 8 Schematic diagram of the sheath in .

[0037] Figure 24 yes Figure 23 An enlarged view of section XXIV in FIG.

[0038] Figure 25 yes Figure 23 Schematic diagram of another perspective of the sheath.

[0039] Figure 26 yes Figure 25 Cross-sectional view along line XXVI-XXVI.

[0040] Figure 27 yes Figure 26 An enlarged view of section XXVII in FIG.

[0041] Figure 28 yes Figure 8 Schematic diagram of the structure of the sheath tube adjustable bending device after removing the second shell.

[0042] Figure 29 yes Figure 1 Schematic diagram of the structure of the interventional medical device pushing device.

[0043] Figure 30 yes Figure 29 Schematic diagram of the exploded view of the interventional medical device pusher.

[0044] Figure 31 yes Figure 29 Schematic cross-sectional view along line XXXI-XXXI.

[0045] Figure 32 yes Figure 30 Schematic diagram of the three-dimensional exploded structure of the first shell and the second shell.

[0046] Figure 33 yes Figure 32 Schematic diagram of the planar structure of the inner side of the first shell.

[0047] Figure 34 yes Figure 32 Schematic diagram of the planar structure of the inner side of the second shell.

[0048] Figure 35 yes Figure 34 Schematic diagram of the planar structure of the outer side of the second shell.

[0049] Figure 36 yes Figure 30 Schematic diagram of the three-dimensional structure of the outer gusset plate.

[0050] Figure 37 yes Figure 30 Schematic diagram of the three-dimensional decomposition of the end cover.

[0051] Figure 38 yes Figure 37 Cross-sectional view along line XXXVIII-XXXVIII.

[0052] Figure 39 yes Figure 30 Schematic diagram of the three-dimensional exploded structure of the first clamping block, the movable block and the second clamping block.

[0053] Figure 40 yes Figure 39 A structural schematic diagram of one side of the first clamping block in FIG.

[0054] Figure 41 yes Figure 39 A schematic structural diagram of the other side of the first clamping block.

[0055] Figure 42 yes Figure 39 Schematic diagram of the side structure of the second clamping block.

[0056] Figure 43 yes Figure 39 A magnified view of the active block in .

[0057] Figure 44 yes Figure 30 Magnified view of the button in .

[0058] Figure 45 yes Figure 30 Schematic diagram of the structure of the first rotating mechanism.

[0059] Figure 46 yes Figure 45 Cross-sectional view along line XLVI-XLVI.

[0060] Figure 47 yes Figure 45 Schematic diagram of the three-dimensional structure of the rotating column.

[0061] Figure 48 yes Figure 30 Schematic diagram of the three-dimensional structure of the second rotating member.

[0062] Figure 49 yes Figure 48 A side view of the second rotating member in FIG.

[0063] Figure 50 yes Figure 49 Cross-sectional view along line L-L.

[0064] Figure 51 yes Figure 30 Combination diagram of the pushing device in.

[0065] Figure 52 yes Figure 51 Cross-sectional view along line LII-LII.

[0066] Figures 53 to 58 yes Figure 3 Schematic diagram of the occluder locking system's locking and release processes for the occluder.

[0067] Figure 59 2 is a schematic structural diagram of an occluder locking system according to a second embodiment of the present invention.

[0068] Figures 60 to 64 yes Figure 59 Schematic diagram of the occluder locking system's locking and release processes for the occluder.

[0069] Figure 65It is a structural diagram of the occluder locking system provided by the third embodiment of the present invention.

[0070] Figure 66 yes Figure 65 Schematic diagram of the state after the occluder locking system is locked.

[0071] Figure 67 It is a flow chart of the locking method of the occluder locking system of the present invention. DETAILED DESCRIPTION

[0072] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0073] In addition, the following descriptions of the embodiments are made with reference to the accompanying drawings to illustrate specific embodiments in which the present invention may be implemented. Directional terms mentioned in the present invention, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," and "side," are merely references to the directions of the accompanying drawings. Therefore, the directional terms used are intended to better and more clearly illustrate and understand the present invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention. "Axial" refers to the direction of the axis of the push member or the axis of the push tube.

[0074] Definition of orientation: For the sake of clarity, the end closer to the operator during surgery is referred to as the "proximal end" and the end farther from the operator is referred to as the "distal end"; the axial direction refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device; the above definitions are for convenience of expression only and are not to be construed as limitations on the present invention.

[0075] See also Figure 1The present invention provides an occluder locking system, comprising an occluder 10, a sheath bending device 20, a dilator 30, a loader 40 disposed at the proximal end of the sheath bending device 20, and a pushing device 60 disposed at the proximal end of the loader 40. The sheath bending device 20 comprises a second housing 21, a sheath 23 whose proximal end is disposed within the second housing 21, and an adjustment mechanism 25 for adjusting the bendable distal end of the sheath 23. The loader 40 comprises a loading tube 42, a sealing seat 44 disposed at the proximal end of the loading tube 42, and a three-way valve 46 radially connected to the sealing seat 44. The distal end of the loading tube 42 can be inserted into the sheath 23. The pushing device 60 can push the occluder 10. The pushing device 60 includes a first shell 61 with an accommodating space, a first control component 64 partially placed in the first shell 61, and a second control component 67 partially sleeved on the first shell 61, as well as a pushing component 68. The pushing member 682 has a slender structure, and part of the pushing member 682 is placed in the first shell 61.

[0076] like Figure 2 and Figure 3 As shown, the occluder 10 includes a first occluding portion 11 , a second occluding portion 15 , and a waist portion 18 disposed between the first occluding portion 11 and the second occluding portion 15 and connecting the first occluding portion 11 and the second occluding portion 15 . A connecting bolt 112 is provided at the distal end of the first blocking portion 11 along the direction of the second blocking portion 15, that is, the connecting bolt 112 extends axially toward the second blocking portion 15, and a first external thread 113 is provided on the side wall of the connecting bolt 112, and a protrusion 152 is provided at the proximal end of the second blocking portion 15, and a through hole 153 is provided on the protrusion 152. Specifically, the through hole 153 is provided on the protrusion 152 along the axis of the occluder 10, and a second external thread 154 is provided on the side wall of the protrusion 152. The thread direction of the first external thread 113 is opposite to the thread direction of the second external thread 154, that is, the thread screwing direction of the first external thread 113 is opposite to the thread screwing direction of the second external thread 154. The proximal end of the connecting bolt 112 can pass through the through hole 153 and be screwed to the nut, and the nut abuts against the proximal end surface of the protrusion 152. The effective thread length of the connecting bolt 112 is greater than or equal to the effective thread length of the nut. A screw hole 115 is axially opened in the middle of the proximal end surface of the connecting bolt 112, and the screw hole 115 is used to be detachably connected to the distal end of the pushing member 682. Specifically, the inner wall of the screw hole 115 is provided with a first internal thread, and the distal end of the pushing member 682 is screwed to the first internal thread.

[0077] like Figure 1 、 Figures 4 to 7As shown, the push assembly 68 includes a push member 682, a push tube 684 movably mounted on the push member 682, and a nut 689 positioned within the distal end of the push tube 684. The distal end of the push member 682 is detachably connected to the connecting bolt 112 of the occluder 10. The inner wall of the distal end of the push tube 684 is provided with a second internal thread 6842 corresponding to the second external thread 154 of the protrusion 152. The first control assembly 64 includes a sliding mechanism 65 that drives the push member 682 to slide axially within the push tube 684, thereby driving the connecting bolt 112 into contact with or away from the threaded hole of the nut 689. The second control assembly 67 includes a rotation mechanism that drives the push tube 684 to rotate, thereby driving the nut 689 to thread the connecting bolt 112 into the nut 689. During the threading of the connecting bolt 112 into the nut 689, the second external thread 154 of the protrusion 152 separates from the second internal thread 6842 of the push tube 684. The fastening direction of the connecting bolt 112 and the nut 689 is opposite to the fastening direction of the second external thread 154 of the protrusion 152 and the second internal thread 6842 of the pushing tube 684 .

[0078] The occluder 10 of the occluder locking system of the present invention includes a connecting bolt 112 disposed at the distal end of the second occluding portion 15, and a protruding portion 152 disposed at the proximal end of the second occluding portion 15. The sidewall of the connecting bolt 112 is provided with a first external thread 113, and the sidewall of the protruding portion 152 is provided with a second external thread 154. The first external thread 113 is threaded in the opposite direction to the second external thread 154. The pushing device 60 of the occluder locking system includes a first control assembly 64, a second control assembly 67, and a pushing assembly 68. The pushing assembly 68 includes a pushing member 682 and a pushing tube 684. The distal end of the pushing member 682 is detachably connected to the proximal end of the connecting bolt 112. The distal inner wall of the pushing tube 684 is provided with a second internal thread 6842 corresponding to the second external thread 154. The first control assembly 64 can drive the pushing member 682 to slide axially, causing the proximal end of the connecting bolt 112 to abut or move away from the nut. The second control assembly 67 can drive the pushing tube 684 to rotate. Because the fastening direction of the connecting bolt 112 and the nut is opposite to the fastening direction of the protrusion 152 and the push tube 684, when the connecting bolt 112 is threaded onto the nut, the protrusion 152 is separated from the push tube 684. Since the proximal end of the connecting bolt 112 is fixedly connected to the nut 689, and the nut 689 abuts the proximal end surface of the protrusion 152, the second external thread 154 of the protrusion 152 and the second internal thread 689 of the push tube 684 can also be separated. Therefore, the occluder 10 of the present invention not only has high locking reliability, but also improves the occlusion effect of the occluder 10, reduces the risk of complications, and increases the service life of the occluder 10. In addition, by operating the pushing device 60, the occluder 10 can be locked to the target position and separated from the push tube 684 at the same time, making it convenient and simple to use.

[0079] Specifically, a first tightening member 110 is provided at the distal end of the first sealing portion 11, and a second tightening member 150 is provided at the proximal end of the second sealing portion 15. The first and second tightening members 110, 150 are located axially with respect to the occluder 10. The first tightening member 110 includes an external sleeve 111 disposed at the distal end of the first sealing portion 11 and a connecting bolt 112 connected to the external sleeve 111. The second tightening member 150 includes an internal sleeve 151 disposed at the proximal end of the second sealing portion 15 and a protrusion 152 connected to the internal sleeve 151. The first and second sealing portions 11 and 15 are formed from woven metal wire into a double-layered circular disc structure with an internal space. A flow-blocking membrane can be provided within each of the first and second sealing portions 11 and 15. The distal ends of the metal wires converge and are positioned between the external sleeve 111 and the distal end of the connecting bolt 112, while the proximal ends of the metal wires converge and are positioned between the internal sleeve 151 and the protrusion 152. The metal wire between the external sleeve 111 and the connecting bolt 112 can be fixed by welding, clamping, etc. Specifically, the external sleeve 111 can be a cylinder with openings at both ends, the distal end of the metal wire is welded to the inner side of the cylinder, and the distal port of the connecting bolt 112 is provided with a convex surface in the radial direction, the diameter of the convex surface is larger than the diameter of the cylinder, the proximal end of the connecting bolt 112 passes through the cylinder and the convex surface is clamped to the distal end surface of the cylinder. In addition, the external sleeve 111 can also be a structure in which an inner cavity is provided in the distal direction from the proximal end, the distal end of the connecting bolt 112 is fixed in the inner cavity, and the metal wire is welded between the external sleeve 111 and the connecting bolt 112. This embodiment adopts the latter structure; the metal wire between the internal sleeve 151 and the protrusion 152 can also be fixed by welding, clamping, etc. The distal end of the connecting bolt 112 is radially protruded with a positioning disk 116, which can be in the shape of a ring, a square, etc. The distal end surface of the positioning disk 116 is axially protruded with a boss 117. During the locking process of the occluder 10, the connecting bolt 112 is stretched toward the proximal direction. When the force acting on the connecting bolt 112 is large, the first tightening member 110 made of metal wire fixed to the connecting bolt 112 may be pulled into the rupture, causing the edge of the first occluding portion 11 to tilt and form a trumpet-like structure. After the first occluding portion 11 tilts up, it cannot form a clamping force on the rupture, affecting the sealing effect of the rupture. The positioning disk 116 arranged in the radial direction near the distal end of the connecting bolt 112 can play a blocking role when the connecting bolt 112 pulls the first blocking part 11 close to the rupture, ensuring that the first blocking part 11 is located in the false cavity and will not be pulled into the rupture by the connecting bolt 112, preventing the edge of the first blocking part 11 from tilting, and ensuring that the first blocking part and the second blocking part form a good clamping effect on the rupture, the external sleeve 111 is clamped on the boss 117, and the distal end of the metal wire is positioned between the positioning disk 116 and the external sleeve 111, and the internal sleeve 151 and the external sleeve 111 can be made of steel sleeves.

[0080] In other embodiments, the occluder 10 may omit the inner sleeve 151 and the outer sleeve 111 , the distal ends of the metal wires converge and are positioned at the distal end of the connecting bolt 112 and are positioned by welding, and the proximal ends of the metal wires converge and are positioned at the distal end of the protrusion 152 and are positioned by welding.

[0081] In this embodiment, the internal sleeve 151 is a cylindrical body with openings at both ends, and the protrusion 152 is also a cylindrical body with openings at both ends. The inner diameter of the internal sleeve 151 is larger than the outer diameter of the protrusion 152. The internal sleeve 151 can be disposed inside or outside the second blocking portion 15. The internal sleeve 151 is sleeved onto the protrusion 152, and the proximal end of the metal wire is located between the inner wall of the internal sleeve 151 and the side wall of the protrusion 152. Preferably, the internal sleeve 15 is located inside the second blocking portion 15, and the distal end of the protrusion 152 extends into the interior of the second blocking portion 15. The internal sleeve 151 is sleeved onto the distal end of the protrusion 152, and the proximal end of the metal wire is folded inward and positioned between the inner wall of the internal sleeve 151 and the side wall of the distal end of the protrusion 152. The inner sleeve 151 is disposed inside the second blocking portion 15 . After the occluder 10 is locked, the length of the second tightening member 150 axially protruding from the second blocking portion 15 can be reduced, thereby reducing the risk of postoperative complications.

[0082] The proximal end of the connecting bolt 112 extends axially toward the proximal end. Before the connecting bolt 112 is locked with the nut, the connecting bolt 112 is located within the occluder 10 and passes through the waist 18 of the occluder 10. In this embodiment, the first external thread 113 is formed on the proximal sidewall of the connecting bolt 112, and the second external thread 154 is formed on the proximal sidewall of the protrusion 152. When the first external thread 113 is left-handed, the second external thread 154 is right-handed; when the first external thread 113 is right-handed, the second external thread 154 is left-handed.

[0083] Please also refer to Figures 4 to 7 Push assembly 68 is a steel cable assembly. Push member 682 is a highly elastic steel cable. Push tube 684 is a highly elastic steel cable tube, into which the steel cable is movably inserted. Push tube 684 includes a main body section 6841 and an extension section 6843 disposed at the distal end of main body section 6841. Nut 689 can be engaged and disengaged within extension section 6843. Second internal threads 6842 are located on the inner wall of the distal end of extension section 6843 and can mate with second external threads 154 of protrusion 152. When the occluder 10 is connected to the pushing assembly 68, the threaded tightening direction of the extension section 6843 and the protrusion 154 is opposite to the tightening direction of the connecting bolt 112 and the nut 689, and the threads of the extension section 6843 and the protrusion 154 are equal to or greater than the threads of the nut 689, and the pitch of the extension section 6843 and the protrusion 154 is equal to or greater than the pitch of the nut 689, so that the proximal end of the connecting bolt 112 extends out of the proximal end surface of the nut 689.

[0084] The sidewall of the distal end of the pusher 682 is provided with a third external thread 6822 that matches the screw hole 115 of the connecting bolt 112. That is, the first internal thread of the inner wall of the screw hole 115 is threadedly connected to the third external thread 6822. The distal end of the pusher 682 can movably pass through the nut 689 and the extension section 6843 disposed within the extension section 6843. Specifically, a cylindrical connecting rod 6821 is axially projected from the middle portion of the distal end surface of the pusher 682. The outer diameter of the connecting rod 6821 is smaller than that of the pusher 682. The third external thread 6822 is located on the sidewall of the distal end of the connecting rod 6821.

[0085] In push tube 684, the outer diameter of main section 6841 is smaller than that of extension section 6843, and the inner diameter of main section 6841 is smaller than that of extension section 6843. Nut 689 can abut against distal end port 6845 of main section 6841. A locking groove 6846 is defined on the inner wall of the proximal end of extension section 6843. Nut 689 can engage and disengage from locking groove 6846. Locking groove 6846 prevents nut 689 from rotating within push tube 684, allowing nut 689 to slide axially within extension section 6843. Specifically, locking groove 6846 is formed as a regular radial inward concave on the inner wall of the proximal end of extension section 6843. Locking groove 6846 can engage nut 689, which can be, for example, a hexagonal nut. Locking groove 6846 is a hexagonal groove corresponding to the hexagonal nut, i.e., the radial cross-section of locking groove 6846 is hexagonal. Therefore, when the nut 689 is engaged in the engaging groove 6846 , the nut 689 cannot rotate relative to the push tube 684 , but the nut 689 slides axially in the extension section 684 and abuts against the distal port 6845 .

[0086] Please refer to Figure 1 The dilator 30 is an elongated cylindrical structure. The diameter of the distal end of the dilator 30 gradually decreases to form a conical structure. A channel (not shown) may also be provided inside the dilator 30 for the passage of a filament. Specifically, the dilator 30 includes an expansion rod 32 and a connecting portion 35 provided at the proximal end of the expansion rod 32. The diameter of the distal end of the expansion rod 32 gradually decreases to form a conical structure. The conical structure facilitates the insertion of the expansion rod 32 into the sheath 23. During the surgical procedure, the dilator 30 must first be assembled into the sheath adjustable bending device 20 to form the expansion assembly.

[0087] Please also refer to Figure 8 and Figure 9The sheath 23 is provided with a flexible distal end, and the proximal end of the sheath 23 is placed in the second housing 21. Specifically, the sheath 23 includes a flexible distal end and a main body section 233. The flexible distal end includes a fixed section 232 located at the distal end and an elastic section 235 connected between the fixed section 232 and the main body section 233. The proximal end of the main body section 233 is placed in the second housing 21. The adjustment mechanism 25 includes an adjustment member 252 placed in the second housing 21, a driving member 254 for driving the adjustment member 252 to move axially along the sheath 23, and two traction wires 256. The two traction wires 256 are slidably placed at different positions within the circumferential wall of the sheath 23 along the axial direction of the sheath 23. A winding portion 2115 is provided in the second housing 21. Preferably, the winding portion 2115 is adjacent to the proximal end of the adjustment member 252. The distal ends of two traction wires 256 are connected to the flexible distal end. The proximal end of one traction wire 256 is connected to the adjusting member 252, while the proximal end of the other traction wire 256 passes around the winding portion 2115 and is connected to the adjusting member 252. Specifically, the distal end of one traction wire 256 is fixed to the fixed section 232 of the sheath tube 23, while the proximal end of one traction wire 256 is directly connected to the adjusting member 252. The distal end of the other traction wire 256 is fixed to the fixed section 232 of the sheath tube 23, while the proximal end of the other traction wire 256 passes around the winding portion 2101 and is connected to the adjusting member 252. The driving member 254 can drive the adjusting member 252 to move and drive the two traction wires 256 to slide, causing the flexible distal end of the sheath tube 23 to bend in different directions, that is, the elastic section 235 of the sheath tube 23 can bend in different directions.

[0088] The sheath tube bending device 20 includes a sheath tube 23 and an adjustment mechanism 25. The sheath tube 23 is provided with a bendable distal end, and the proximal end of the sheath tube 23 is placed in the second housing 21. The adjustment mechanism 25 includes an adjustment member 252, a driving member 254, and two traction wires 256 slidably placed at different positions within the peripheral wall of the sheath tube 23. The distal ends of the two traction wires 256 are respectively connected to the bendable distal end. The proximal end of one traction wire 256 is directly connected to the adjustment member 252, and the other traction wire 256 is connected to the adjustment member 252 after passing through the winding portion 2101. When the driving member 254 drives the adjustment member 252 to move toward the distal end or proximal end along the axial direction of the main body section 233, it can drive the two traction wires 256 to slide, so that the bendable distal end of the sheath tube 23 can bend in different directions. Since the sheath 23 of the sheath bending device 20 can bend in different directions, the number of rotations of the sheath 23 can be reduced and the rotation amplitude of the sheath 23 can be reduced; in addition, the sheath bending device 20 is easy to use and simple to operate, which improves the working efficiency of the sheath bending device 20 and enhances the success rate of the operation.

[0089] The second housing 21 includes a first outer shell 211, a second outer shell 213, a distal cap 215, a positioning tube 217 disposed at the proximal end of the second housing 21, and a proximal cap 218 connected to the proximal end of the positioning tube 217. The first outer shell 211 is attached to the second outer shell 213 to form a tubular structure with open ends. The distal cap 215 is positioned at the distal end of the tubular structure, and the positioning tube 217 is positioned at the proximal end of the tubular structure. The main body 233 of the sheath tube 23 passes through the distal cap 215 and the tubular structure and is fixedly connected to the positioning tube 217.

[0090] like Figure 10 and Figure 11 As shown, a semicircular arc-shaped limiting strip 2111 is axially protruded from the distal end of the first housing 211. The limiting strip 2111 and the distal end of the first housing 211 form a semicircular limiting groove 2112. The inner wall of the first housing 211 is provided with a plurality of first support pieces 2113, two first positioning posts 2114, two winding portions 2115, two first positioning pieces 2116, and a semicircular first extension tube 2117 in sequence from the distal end to the proximal end. Several first support plates 2113 are arranged axially along the first housing 211, supporting the driver 254. Two first positioning posts 2114 are arranged radially along the first housing 211, each with a first positioning slot 2110 at its distal end. Two winding portions 2115 are winding posts extending radially along the first housing 211, spaced apart in the radial direction of the first housing 211. Two first positioning plates 2116 are arranged axially along the first housing 211, with corresponding positioning holes 2118 defined in the middle of the two first positioning plates 2116. A first extension tube 2117 obliquely penetrates the sidewall of the first housing 211, with the two first positioning plates 2116 and the first extension tube 2117 used to secure the positioning tube 217. Several latching plates 2119 are provided on the opposing sidewalls of the first housing 211.

[0091] like Figure 12 and Figure 13As shown, the structure of the second housing 213 is similar to that of the first housing 211. A semicircular arc-shaped limiting strip 2131 is axially protruded from the distal end surface of the second housing 213. The limiting strip 2131 and the distal end surface of the second housing 213 form a semicircular limiting groove 2132. The inner wall of the second housing 213 is provided with a plurality of second support pieces 2133, two second positioning posts 2134, two second positioning pieces 2136, and a semicircular second extension tube 2137 in sequence from the distal end to the proximal end. Several second support plates 2133 are spaced apart along the axial direction of the second housing 213 and are used to support the driving member 254. Two second positioning posts 2134 are spaced apart along the radial direction of the second housing 213, with a second positioning slot 2130 defined at the distal end of each second positioning post 2134. Two second positioning plates 2136 are spaced apart along the axial direction of the second housing 213, with corresponding positioning holes 2138 defined in the middle portions of the two second positioning plates 2136 along the axial direction of the second housing 213. A second extension tube 2137 obliquely passes through the sidewall of the second housing 213. The two second positioning plates 2136 and the second extension tube 2137 are used to accommodate the positioning tube 217. Several elastic engaging hooks 2139 are projected from opposite sidewalls of the second housing 213, corresponding one-to-one with the engaging plates 2119 of the first housing 211.

[0092] like Figures 14 to 16 As shown, the distal cap 215 includes a cap body 2151 and a sleeve 2157 connected to the distal end of the cap body 2151. The distal cap 215 defines an axial through-hole 2152, which passes through the middle of the cap body 2151 and the sleeve 2157. The cap body 2151 defines fixing holes 2153 on opposite sides of the through-hole 2152. The fixing holes 2153 extend axially along the through-hole 2152 and pass through the proximal end surface of the cap body 2151. Guide posts 2154 are respectively fixed in the two fixing holes 2153. The two guide posts 2154 are spaced and parallel, and the proximal ends of the guide posts 2154 extend beyond the proximal end surface of the distal cap 215.

[0093] In this embodiment, the sleeve 2157 is snap-fitted to the distal end of the cap body 2151. Specifically, a snap ring 2155 is protruding from the distal end surface of the cap body 2151 around the through hole 2152. A snap groove 2158 is defined around the proximal end surface of the sleeve 2157 around the through hole 2152, corresponding to the snap ring 2155. The snap ring 2155 can snap into the snap groove 2158. The sleeve 2157 is made of a soft material such as rubber or silicone. The proximal end of the sheath tube 23 passes through the sleeve 2157 and the through hole 2152 of the cap body 2151 and is then connected between the first and second housings 211 and 213. Since the sleeve 2157 is made of a soft material, it can reduce friction and wear between the distal end of the distal cap 215 and the distal end of the distal end cap 215 due to the shaking of the sheath tube 23.

[0094] like Figure 17 and Figure 18 As shown, positioning tube 217 is a Y-shaped tube comprising a main tube 2171 and a side tube 2173 obliquely projecting from the proximal end of main tube 2171. Side tube 2173 is connected to main tube 2171. An annular protrusion 2175 is formed on the outer circumference of the distal end of main tube 2171. The axial extension of protrusion 2175 is equal to the distance between the two first positioning tabs 2116 of first housing 211. The proximal end of main tube 2171 defines an internal thread 2176 for connection to proximal end cap 218.

[0095] like Figure 19 and Figure 20 As shown, the proximal cap 218 is cylindrical, with an axial through-hole 2182 defined in the middle of the proximal cap 218. The distal sidewall of the proximal cap 218 is provided with external threads 2184 corresponding to the internal threads 2176 of the positioning tube 217. An annular stopper 2185 is protruded from the proximal sidewall of the proximal end of the proximal cap 218 to enhance the tightness of the threaded connection between the proximal cap 218 and the positioning tube 217.

[0096] like Figure 21 and Figure 22 As shown, the adjusting member 252 is threadedly connected to the driving member 254. The rotation of the driving member 254 can drive the adjusting member 252 to move axially along the sheath tube 23. Specifically, the adjusting member 252 is cylindrical, and a through hole 2520 is defined in the middle of the adjusting member 252 along the axial direction. The adjusting member 252 can be slidably connected to the sheath tube 23 through the through hole 2520. The adjusting member 252 defines two fixing holes 2522 on opposite sides of the through hole 2520. The two fixing holes 2522 are used to respectively fix the proximal ends of the two traction wires 256. The adjusting member 252 defines two guide holes 2524 on the other two sides of the through hole 2520. The two guide holes 2524 correspond to the two guide posts 2154, that is, the two guide posts 2154 can be slidably inserted into the two guide holes 2524. The outer circumferential surface of the adjusting member 252 defines an external thread 2526.

[0097] In this embodiment, the axis lines of the two fixing holes 2522 are symmetrical along the axis line of the through hole 2520, and the axis lines of the two fixing holes 2522 are coplanar with the axis line of the through hole 2520; the axis lines of the two guide sliding holes 2524 are symmetrical along the axis line of the through hole 2520, and the axis lines of the two guide sliding holes 2524 are coplanar with the axis line of the through hole 2520; the plane formed by the axis lines of the two fixing holes 2522 is perpendicular to the plane formed by the axis lines of the two guide sliding holes 2524.

[0098] The driving member 254 includes a rotating cylinder 2541 and an operating portion 2543 provided on the rotating cylinder 2541. Specifically, the rotating cylinder 2541 is provided at one end of the driving member 254, and the operating portion 2543 is provided on the distal side wall of the rotating cylinder 2541. The inner circumferential surface of the rotating cylinder 2541 is provided with an internal thread 2545 corresponding to the external thread 2526 of the adjusting member 252. The adjusting member 252 can be accommodated in the rotating cylinder 2541. The outer circumferential surface of the adjusting member 252 is threadedly connected to the inner circumferential surface of the rotating cylinder 254, that is, the external thread 2526 is screwed to the internal thread 2545. The operating portion 2543 is an annular sleeve, which is fixedly sleeved on the rotating cylinder 2541. Rotating the operating portion 2543 can drive the rotating cylinder 2541 to rotate together. Anti-slip strips 2546 are provided on the outer circumferential surface of the operating portion 2543. These anti-slip strips 2546 facilitate the rotation of the driving member 254.

[0099] In other embodiments, the rotating cylinder 2541 and the operating portion 2543 may be integrally formed.

[0100] In other embodiments, the rotating cylinder 2541 and the operating portion 2543 may be fixed by screwing, gluing, welding, or the like.

[0101] In other embodiments, the outer peripheral surface of the operating portion 2543 may be provided with anti-slip grooves or roughened.

[0102] like Figure 23 and Figure 24 As shown, two traction wires 256 are located at opposite ends of the sheath tube 23 in the diametrical direction, and the distal ends of the traction wires 256 are fixed to the fixed section 232. The traction wires 256 can slide axially within the circumferential wall of the sheath tube 23. The elastic section 235 is made of elastic material and can elastically return to its original shape after being bent 180 degrees. An annular developing ring 2321 is disposed within the fixed section 232 of the sheath tube 23, and the distal ends of the two traction wires 256 are respectively fixed to the proximal ends of the developing ring 2321. Preferably, two opposing traction tubes 237 are disposed within the circumferential wall of the sheath tube 23. Each traction tube 237 extends axially along the sheath tube 23 and is located at opposite ends of the sheath tube 23 in the radial direction. The distal end of each traction tube 237 is connected to the fixed section 232 of the sheath tube 23. Specifically, the traction tubes 237 are welded to the proximal circumferential wall of the developing ring 2321 by welding or bonding. The proximal end of each traction tube 237 extends along the circumferential wall of the sheath tube 23 into the second housing 21. The proximal end of each traction tube 237 bends away from the axis and extends into the second housing 21. Two traction wires 256 are slidably disposed within the two traction tubes 23. The distal end of each traction wire 256 is welded to the developing ring 2321 of the fixed section 232. The proximal end of the traction wire 256 extends through the proximal end of the traction tube 23 and connects to the adjusting member 252. The traction wire 256 can slide along the corresponding traction tube 23.

[0103] In this embodiment, the two traction tubes 237 are located at both ends of the diameter of the traction tube 23 , and the axis lines of the two traction tubes 237 and the axis line of the sheath tube 23 are located in the same plane.

[0104] like Figures 25 to 27 As shown, two bending-assisting grooves 2351 are recessed on the outer circumference of the elastic section 235 of the sheath tube 23, corresponding to the two traction wires 256. Specifically, the two bending-assisting grooves 2351 correspond one-to-one to the two traction tubes 237, and each bending-assisting groove 2351 extends axially along the sheath tube 23 to the distal end of the main section 233. Under the pulling force of the traction wires 256, the sheath tube 23 concentrates stress in the corresponding bending-assisting groove 2351, helping the elastic section 235 to bend along the direction of the bending-assisting groove 2351 under the smaller force of the corresponding traction wires 256, thereby improving the accuracy of the bending direction of the elastic section 235, the ease of bending, and the simplicity of operation.

[0105] Please also refer to Figures 8 to 28 When assembling the sheath tube adjustable bending device 20, first screw the adjusting member 252 into the rotating cylinder 2541 of the driving member 254, and insert a gasket 255 into the rotating cylinder 2541 from the proximal end until the gasket 255 hits the proximal end surface of the operating part 2543, and the gasket 255 facilitates the rotation of the driving member 254; the proximal end of the main section 233 of the sheath tube 23 is slidably passed through the through hole 2520 of the adjusting member 252 from the distal end of the rotating cylinder 2541, and the proximal end of the main section 233 is fixed to the distal end of the positioning tube 217; the rotating cylinder 2541 of the driving member 254 is placed on the first supporting piece 2113 of the first shell 211, and the protrusion 2175 of the positioning tube 217 is clamped between the two first positioning pieces 2116, and the positioning tubes 217 at both ends of the protrusion 2175 are clamped into the positioning holes 2118 of the two first positioning pieces 2116. At this time, the operating part 2543 of the driving member 254 is exposed at the distal end of the first shell 211, part of the gasket 255 is clamped in the limiting groove 2112 of the first shell 211, the sheath 23 passes through the gap between the two first positioning columns 2114 and the gap between the two winding parts 2115, and the side tube 2173 of the positioning tube 217 is inserted into the first extension tube 2117.

[0106] The proximal end of one of the traction wires 256 is fixed to the distal end of one of the fixing holes 2522 of the adjusting member 252, and the proximal end of the other traction wire 256 is passed through the winding portion 2115 and fixed to the distal end of the other fixing hole 2522. At this point, the two traction wires 256 are located on opposite sides of the axis of the sheath tube 23, and the two traction wires 256 are in a taut state, while the elastic section 235 of the sheath tube 23 is in a straight state.

[0107] The sleeve 2157 is sleeved onto the distal end of the cap body 2151. The proximal ends of the two guide slides 2154 of the distal end cap 215 are slidably passed through the two guide slide holes 2524 of the adjustment member 252 from the distal end of the rotating cylinder 2541 until the proximal ends of the guide slides 2154 are respectively engaged with the first positioning grooves 2110 of the two first positioning posts 2114. At this point, the distal end of the sheath tube 23 is exposed through the through holes 2152 of the cap body 2151 and the sleeve 2157. The second housing 213 is then placed over the first housing 211, with the other portion of the gasket 255 engaged with the retaining groove 2132 of the second housing 213 and the engaging hook 2139 of the second housing 213 engaged with the corresponding engaging piece 2119 of the first housing 211, thereby installing the adjustment mechanism 25 between the first and second housings 211 and 213. At this time, the second supporting piece 2133 of the second housing 213 corresponds to the first supporting piece 2113 of the first housing 211 one by one, and the first supporting piece 2113 and the second supporting piece 2132 relative to each other form a circular hole for installing the rotating cylinder 2541, and the driving member 254 can rotate in the circular hole; the second positioning column 2134 of the second housing 213 corresponds to the first positioning column 2114 of the first housing 211 one by one, and the first positioning groove 2110 of the corresponding first positioning column 2114 corresponds to the second positioning column 2134. The second positioning grooves 2130 together form a space for securing the proximal end of the sheath 23. The ends of the two winding portions 2115 abut the inner wall of the second housing 213, preventing the traction wire 256 from escaping from the winding portions 2115. The second positioning piece 2136 of the second housing 213 corresponds one-to-one with the first positioning piece 2116 of the first housing 211, and the corresponding positioning holes 2118 of the first positioning piece 2116 and the positioning holes 2138 of the second positioning piece 2136 form a space for mounting the main tube 2171 of the positioning tube 217. The external threads 2184 of the proximal cap 218 are then screwed onto the internal threads 2176 at the proximal end of the main tube 2171. A sealing ring 219 is disposed between the proximal cap 218 and the main tube 2171 to prevent blood or other fluids within the sheath 23 from flowing out of the proximal end of the proximal cap 21 during an interventional procedure.

[0108] When the sheath tube bending adjustable device 20 is used, the operating portion 2543 is operated to cause the driving member 254 to rotate axially, thereby driving the adjusting member 252 to move toward the proximal end or the distal end along the guide slide column 2154 . When the adjusting member 252 is in the initial state, the adjusting mechanism 25 drives the traction wire 256 directly fixed on the adjusting member 252 to slide toward the proximal end, so that the elastic segment 235 bends toward one side of the traction wire 256. During the bending process, the traction wire 256 connected to the adjusting member 252 after bypassing the winding portion 2115 is pulled toward the distal end by the deformation of the elastic segment 235 to slide, so that the elastic segment 235 completes the bending. When the adjusting mechanism 25 is in the initial state, when the adjusting member 252 is moved toward the distal end, the traction wire 256 connected to the adjusting member 252 after bypassing the winding portion 2115 is driven by the adjusting member 252 to slide toward the proximal end, so that the elastic segment 235 bends toward one side of the traction wire 256. During the bending process, the elastic segment 235 drives the traction wire 256 directly fixed on the adjusting member 252 to slide toward the distal end, so that the elastic segment 235 completes the bending.

[0109] The initial state of the adjustment mechanism 25 means that the elastic section 235 of the sheath tube 23 is in a straightened state.

[0110] Because the adjusting member 252 and the driving member 254 are threadedly connected, when the elastic section 235 of the sheath tube 23 needs to be bent, the operating portion 2543 is simply operated to rotate the driving member 254, thereby driving the adjusting member 252 to move back and forth along the axial direction of the sheath tube 23, thereby causing the elastic section 235 of the sheath tube 23 to bend to the appropriate position. When the rotating cylinder 2541 is not rotated, the adjusting member 252 can be positioned. Therefore, the elastic section 235 of the sheath tube 23 of the adjustable sheath tube bending device 20 of the present invention can be bent to any angle and can be positioned at any angle. The adjustable sheath tube bending device 20 is simple to operate and easy to use, which can improve work efficiency and increase the success rate of surgery.

[0111] In other embodiments, the rotating cylinder 2541 of the driving member 254 of the adjustment mechanism 25 can be replaced with a screw. The adjustment member 252 is axially provided with a threaded through hole corresponding to the screw. The screw is screwed into the threaded through hole. Rotating the screw can drive the adjustment member 252 to axially reciprocate. Specifically, the screw is disposed in the middle of the radial cross-section of the operating portion 2543 and extends axially. The middle portion of the screw has an axial through hole. The threaded through hole is provided in the middle of the radial cross-section of the adjustment member 252 and axially penetrates the proximal and distal surfaces of the adjustment member 252. After the screw is screwed into the threaded through hole, the proximal end of the sheath 23 can slide through the screw through hole and the threaded through hole. The guide column 2154 can also slide through the screw through hole.

[0112] Please also refer to Figures 29 to 31The first control component 64 includes a sliding mechanism 65 and a first rotating mechanism 66. The sliding mechanism 65 can drive the pushing member 682 to slide axially and position in the pushing tube 684. The first rotating mechanism 66 can drive the pushing member 682 to rotate in the pushing tube 684. The second control component 67 includes a second rotating mechanism 670. The second rotating mechanism 670 can drive the pushing tube 684 to rotate outside the pushing member 682.

[0113] The sliding mechanism 65 of the pushing device 60 can drive the pushing member 682 to slide axially in the pushing tube 684, and can drive the proximal end of the connecting bolt 112 to pass through the through hole 153 of the protrusion 152 to abut or move away from the nut 689 positioned in the pushing tube 684; the first rotating mechanism 66 can drive the pushing member 682 to rotate in the pushing tube 684, and can realize the threaded connection or separation of the third external thread 6822 of the pushing member 682 and the screw hole 115 of the connecting bolt 112; the second rotating mechanism 670 can drive the pushing tube 684 to rotate outside the pushing member 682, driving the nut 689 to rotate, so that the nut 689 is threadedly connected to the connecting bolt 112 and the second external thread 154 of the protrusion 152 is separated from the second internal thread 6842 of the pushing tube 684, or the nut 689 is separated from the connecting bolt 112 and the second external thread 154 of the protrusion 152 is threadedly connected to the second internal thread 6842 of the pushing tube 684. The pushing device 60 is simple to operate and easy to use, which improves the reliability and efficiency of the pushing device 60 and thus reduces the operation time.

[0114] The first shell 61 includes a first outer shell 611, a second outer shell 613, an outer buckle plate 615 and an end cover 616. The first outer shell 611 is connected to the second outer shell 613 to form a tubular structure with two ends open. The sliding mechanism 65 is axially arranged in the tubular structure, the first rotating mechanism 66 is arranged at the proximal end of the tubular structure, the second rotating mechanism 670 is arranged at the distal end of the tubular structure, and the end cover 616 is arranged at the distal end of the second rotating mechanism 670.

[0115] like Figure 32 and Figure 33 As shown, at least one first support piece 6112 and at least one second support piece 6113 are axially disposed at the distal end of the inner wall of the first housing 611, and at least one third support piece 6115 is disposed at the proximal end of the inner wall of the first housing 611. The first support piece 6112, the second support piece 6113, and the third support piece 6115 are all semi-circular ring-shaped pieces, and the first support piece 6112 is spaced apart from the second support piece 6113. The axes of the first support piece 6112, the second support piece 6113, and the third support piece 6115 all extend axially, and the axes of the first support piece 6112, the second support piece 6113, and the third support piece 6115 coincide with each other.

[0116] In this embodiment, there are two first support plates 6112, which are axially spaced and parallel to each other; there is one second support plate 6113; and there are two third support plates 6115, which are axially spaced and parallel to each other.

[0117] In other embodiments, the number of the first support piece 6112 , the second support piece 6113 , and the third support piece 6115 may be other values.

[0118] A rectangular flat surface 6110 is provided on the sidewall of the first housing 611. The length of the flat surface 6110 extends axially, that is, from the distal end to the proximal end. A strip-shaped opening 6116 is defined in the flat surface 6110 along the axial direction. The strip-shaped opening 6116 is located between the second support plate 6113 and the third support plate 6115, and extends from the distal end to the proximal end of the first housing 611. A rack 6117 is provided on the inner wall of the first housing 611 on at least one side of the strip-shaped opening 6116. The rack 6117 extends from the distal end to the proximal end of the strip-shaped opening 6116. A plurality of latching tabs 6118 are provided on opposite side walls of the first housing 611.

[0119] In this embodiment, the inner wall of the first housing 611 defines strip-shaped grooves along the axial direction on two opposite sides of the strip-shaped opening 6116 , and a rack 6117 is disposed in each strip-shaped groove.

[0120] like Figure 32 、 Figure 34 and Figure 35 As shown, the structure of the second housing 613 is similar to that of the first housing 611. At least one fourth support piece 6132 and at least one fifth support piece 6133 are axially disposed at the distal end of the inner wall of the second housing 613, and at least one sixth support piece 6135 is disposed at the proximal end of the inner wall of the second housing 613. The fourth support piece 6132, the fifth support piece 6133, and the sixth support piece 6135 are all semi-circular ring-shaped pieces, and are spaced apart from the fourth support piece 6132 and the fifth support piece 6133. The axes of the fourth support piece 6132, the fifth support piece 6133, and the sixth support piece 6135 all extend axially, and the axes of the fourth support piece 6132, the fifth support piece 6133, and the sixth support piece 6135 coincide with each other. When the first shell 611 is covered with the second shell 613, the first support piece 6112, the second support piece 6113 and the third support piece 6115 of the first shell 611 correspond one-to-one with the fourth support piece 6132, the fifth support piece 6133 and the sixth support piece 6135 of the second shell 613 respectively; and the first support piece 6112 and the corresponding fourth support piece 6132 form a circular support piece, the second support piece 6113 and the fifth support piece 6133 form a circular support piece, and the third support piece 6115 and the corresponding sixth support piece 6135 form a circular support piece.

[0121] In this embodiment, there are two fourth support pieces 6132 , which are spaced apart and parallel to each other; there is one fifth support piece 6133 ; and there are two sixth support pieces 6135 , which are spaced apart and parallel to each other.

[0122] In other embodiments, the number of the fourth support piece 6132 , the fifth support piece 6133 , and the sixth support piece 6135 may be other values.

[0123] At least one guide rail 6136 is axially protruded from the inner wall of the second housing 613. The guide rail 6136 is located between the fifth support piece 6133 and the sixth support piece 6135, and extends from the distal end to the proximal end. In this embodiment, two guide rails 6136 are spaced apart and protruded in parallel from the middle of the inner wall of the second housing 613. A plurality of positioning blocks 6137 are axially spaced apart between the two guide rails 6136, and each positioning block 6137 has a latching hole. A mounting opening 6138 is defined in the middle of the side wall of the second housing 613, and a plurality of latching holes 6139 are defined around the mounting opening 6138. A plurality of elastic snap-in hooks 6131 are respectively protruded from the opposite side walls of the second housing 613. These snap-in hooks 6131 correspond one-to-one with the snap-in pieces 6118 of the first housing 611.

[0124] like Figure 36 As shown, the outer clasp 615 is an outwardly convex arc-shaped piece. The outer clasp 615 corresponds to the mounting opening 6138 of the second housing 613. The outer clasp 615 is provided with a plurality of positioning posts 6151 and a plurality of hooks 6153 on the side facing the outer clasp 615. The positioning posts 6151 correspond one-to-one with the locking holes of the positioning block 6137 of the second housing 613, and the hooks 6153 correspond one-to-one with the locking holes 6139 of the second housing 613. The sidewalls of the outer clasp 615 are provided with anti-slip stripes or protrusions to increase friction, making it easier for fingers to grip the conveying device 60 and facilitate operation of the conveying device 60.

[0125] like Figure 37 and Figure 38 As shown, the end cap 616 has a conical structure and includes a cap 6160 and a sleeve 6165 connected to the distal end of the cap body 6160. The end cap 616 defines an axial through-hole 6161 that passes through the middle of the cap body 6160 and the sleeve 6165. The cap 6160 defines a conical cavity. The proximal inner wall of the cap 6160 defines an annular groove 6162, the axis of which coincides with the axis of the through-hole 6161. Two opposing retaining blocks 6164 are disposed within the conical cavity at the rear end of the cap 6160.

[0126] The sleeve 6165 is snap-fitted to the distal end of the cap body 6160. Specifically, a snap ring 6163 is protruding from the inner circumference of the through hole 6161 at the distal end of the cap body 6160. An extension column is protruding from the proximal end of the sleeve 6165 around the through hole 6161. A pair of protruding tabs 6167 are radially protruding from the proximal ends of the extension column. After the sleeve 6165 is extended and inserted into the through hole 6161 of the cap body 6160, the protruding tabs 6167 snap-fit into the snap ring 6163 of the cap body 6160, thereby securing the sleeve 6165 to the cap body 6160. The sleeve 6165 is made of a soft material such as rubber or silicone. The proximal end of the push assembly 601 passes through the sleeve 6165 and the through hole 6161 of the cap body 6160 and is then connected to the first housing 61. Since the sleeve 6165 is made of soft material, the sleeve 6165 can reduce the friction and wear between the shaking of the pushing component 601 and the distal port of the end cover 616.

[0127] Please also refer to Figure 30 、 Figure 31 and Figures 39 to 43 The sliding mechanism 65 is axially slidably disposed within the first housing 61. The sliding mechanism 65 includes at least one guide rail 651 extending axially within the first housing 61, a movable block 653 slidably disposed within the at least one guide rail 651, and a sliding member 650 capable of driving the movable block 653 to slide along the guide rail 651. The proximal end of the pushing member 682 is fixed to the movable block 653. The sliding member 650 includes a first clamping block 654 and a second clamping block 655, as well as a button 656 partially exposed from the first housing 61 and connected to the sliding member 650. The first clamping block 654 can move closer to or further from the second clamping block 655. The movable block 653 is arranged between the first clamping block 654 and the second clamping block 655. When the first clamping block 654 and the second clamping block 655 are close to each other, the movable block 653 can be clamped between the first clamping block 654 and the second clamping block 655; when the first clamping block 654 and the second clamping block 655 are away from each other, the clamping of the movable block 653 can be released, and the movable block 653 can be rotated.

[0128] In this embodiment, two parallel guide rails 651 are axially arranged in the first housing 61 .

[0129] The first clamping block 654 is roughly semi-circular in structure. A rectangular top surface 6541 is provided in the middle of the sidewall of the first clamping block 654. The length of the top surface 6541 extends along the axial direction of the first clamping block 654. A portion of the first clamping block 654 can pass through and slide along the strip-shaped opening 6116. Specifically, a sliding bar 6542 is provided protruding from the middle of the top surface 6541. The length of the sliding bar 6542 extends along the length of the top surface 6541 and can be slidably inserted into the strip-shaped opening 6116 of the first housing 611. A latching tooth 6544 is provided on at least one side of the sliding bar 6542 on the top surface 6541. The latching tooth 6544 can latch onto a corresponding rack 6117 of the first housing 611. Preferably, the top surface 6541 is provided with latching teeth 6544 on opposite sides of the slide bar 6542. The two latching teeth 6544 can respectively engage with the two racks 6117 of the first housing 611. Connecting posts 6545 are respectively provided on the top surface 6541 at opposite ends of the slide bar 6542. The first clamping block 654 is provided with two guide posts 6546 and a guide slide 6547 on the two side surfaces facing away from the top surface 6541. The guide slide 6547 on each side is positioned between the two guide posts 6546 on the same side. A first clamping groove 6548 is defined in the middle of the inner wall of the first clamping block 654. The first clamping groove 6548 can accommodate the side wall of the movable block 653.

[0130] The second clamping block 655 is roughly semi-circular in structure. Two spaced-apart slide slots 6552 are axially defined in the middle of the sidewall of the first clamping block 654. These slots 6552 correspond to the guide rails 6136 of the second housing 613, allowing the second clamping block 655 to slide along the guide rails 6136. Two guide holes 6554 and an inlet hole 6556 are defined on opposite sides of the second clamping block 655. The inlet hole 6556 on each side is located between the two guide holes 6554 on that side. A second clamping groove 6558 is defined in the middle of the inner wall of the second clamping block 655. This second clamping groove 6558 accommodates the sidewall of the movable block 653.

[0131] The movable block 653 has a cylindrical structure, and the proximal end of the pusher 682 is fixed to the middle portion of the movable block 653. Specifically, a fixing hole 6532 is defined axially in the middle portion of the distal end surface of the movable block 653, and the proximal end of the pusher 682 is fixed within the fixing hole 6552. The end surface of the movable block 653 defines two through-holes 6534 on opposite sides of the fixing hole 6552. Each through-hole 6534 extends axially through the proximal and distal ends of the movable block 653. The sidewall of the movable block 653 defines a plurality of welding holes 6535 that communicate with the fixing holes 6552. The pusher 682 is secured to the movable block 653 by adding solder to the welding holes 6535.

[0132] An elastic member 658 is provided between the first clamping block 654 and the second clamping block 655. The elastic member 658 can force the first clamping block 654 to move away from the second clamping block 655. Preferably, the elastic member 658 is a spring sleeved outside the guide slide 6546.

[0133] like Figure 44 As shown, a recess 6561 is provided in the middle of the side wall of button 656. Several anti-slip strips 6563 are provided on the surface of recess 6561, allowing fingers to be inserted into recess 6561 for convenient operation of button 656. Connecting blocks 6564 are provided on opposite ends of the side of button 656 facing away from recess 6561. Each connecting block 6564 has a connecting hole 6566 defined on the side facing away from recess 6561. The two connecting holes 6566 correspond to the two connecting posts 6545 of the first clamping block 654.

[0134] In other embodiments, the button 656 may also be directly disposed on the sliding member 650 . Furthermore, the first clamping block 654 is provided with a button passing through the strip-shaped opening 6116 .

[0135] Please also refer to Figures 45 to 47 The first rotating mechanism 66 includes a first rotating member 662 fixed to the guide rail 651 and a rotating column 664 rotatably disposed within the first housing 61 about the axis of the push member 682. Specifically, the first rotating mechanism 66 is fixedly connected to the proximal end of the guide rail 651, and the rotating column 664 is fixedly connected to the distal end of the guide rail 651. The axis of the guide rail 651 is spaced parallel to the axis of the push member 682. The first rotating member 662 is rotatably disposed at the proximal end of the first housing 61 about the axis of the push member 682. Rotation of the first rotating member 662 drives the movable block 653 and the rotating column 664 to rotate via the guide rail 651, thereby rotating the push member 682.

[0136] Specifically, the first rotating member 662 includes a handle portion 6621 and a rotating rod 6623 protruding from the middle portion of the distal end of the handle portion 6621. The rotating rod 6623 is cylindrical, and two annular guide grooves 6625 are defined along its circumference on its sidewall. The two guide grooves 6625 correspond to the annular support piece formed by the third support piece 6115 of the first housing 611 and the sixth support piece 6135 of the second housing 613. The axes of the two guide grooves 6625 coincide with the axis of the first rotating member 662, allowing the first rotating member 662 to rotate along the guide grooves 6625. The end surface of the rotating rod 6623 facing away from the handle portion 6621 defines two spaced apart fixing holes 6626. The axes of the two fixing holes 6626 do not coincide with the axis of the rotating rod 6623. The proximal ends of the two guide rails 651 are respectively fixed within the two fixing holes 6626. A plurality of anti-slip grooves 6627 are provided on the side wall of the handle portion 6621 to facilitate the rotation of the first rotating member 662 .

[0137] The rotating column 664 is cylindrical, with a guide groove 6642 defined along its circumference on its sidewall. This guide groove 6642 corresponds to the annular support plate formed by the second support plate 6113 of the first housing 611 and the fifth support plate 6133 of the second housing 613. The rotating column 664 is capable of rotating along the guide groove 6642. A through hole 6643 is defined axially in the middle of the rotating column 664, extending through its proximal and distal surfaces. The pusher 682 can movably pass through the through hole 6643. The axis of the through hole 6643 coincides with the axis of the guide groove 6642. The proximal surface of the rotating column 664 defines two fixing holes 6646 on opposite sides of the through hole 6643. The distal ends of the two guide rails 651 are secured to the two fixing holes 6646, respectively.

[0138] like Figures 48 to 50 As shown, the second rotating member 670 is rotatably disposed at the distal end of the first housing 61 about the axis of the pushing member 682. The second rotating member 670 is cylindrical, and a through hole 6701 is axially defined in the middle of the second rotating member 670. The proximal end of the pushing tube 684 can be fixed in the through hole 6701, and the pushing member 682 can move through the through hole 6701. The axis of the through hole 6701 coincides with the axis of the pushing tube 684, and the axis of the second rotating member 670 also coincides with the axis of the through hole 6701.

[0139] Specifically, the second rotating member 670 includes a cylindrical operating portion 6702, a rotating portion 6704 protruding from the middle of the proximal end surface of the operating portion 6702, and an annular protrusion 6705 protruding from the distal end surface of the operating portion 6702. The sidewalls of the operating portion 6702 are provided with anti-slip strips that facilitate finger rotation of the second rotating member 670. The rotating portion 6704 is cylindrical, and two annular guide grooves 6706 are defined along its circumference. The two guide grooves 6706 correspond to the annular support piece formed by the first support piece 6112 of the first housing 611 and the fourth support piece 6132 of the second housing 613. The axis of the two guide grooves 6706 coincides with the axis of the through hole 6701, allowing the second rotating member 670 to rotate along the guide grooves 6706. The axis of the annular protrusion 6705 coincides with the axis of the through hole 6701. The annular protrusion 6705 is provided with two opposing hooks 6707 along its radial direction. The two hooks 6707 correspond to the two latching blocks 6164 of the cap body 6160. The inner wall of the proximal end of the through hole 6701 is provided with an internal thread 6708, and the side wall of the proximal end of the push tube 684 is provided with an external thread corresponding to the internal thread 6708.

[0140] Please also refer to Figures 29 to 52When assembling the pushing device 60, the proximal end of the pushing member 682 is movably passed through the through hole 6643 of the rotating column 664 and then fixed in the fixing hole 6532 of the movable block 653. The two guide rails 651 are slidably passed through the two through holes 6534 of the movable block 653, and the distal ends of the two guide rails 651 are respectively fixed in the two fixing holes 6646 of the rotating column 664. The proximal ends of the two guide rails 651 are respectively fixed in the two fixing holes 6626 of the first rotating member 662. The movable block 653 is slidably provided in the guide rails 651 and is located between the first rotating member 662 and the rotating column 664. The elastic members 658 are respectively fitted on the guide rails 6546. The movable block 653 is placed between the first clamping block 654 and the second clamping block 655. The first clamping block 654 is covered with the second clamping block. 655, the movable part 653 can be movably clamped in the receiving space surrounded by the first clamping groove 6548 of the first clamping block 654 and the second clamping groove 6558 of the second clamping block 655, the guide slide column 6546 can be slidably inserted into the corresponding guide slide hole 6554, and the elastic part 658 elastically presses between the first clamping block 654 and the second clamping block 655. The first clamping block 654 is close to the second clamping block 655 so that the guide slide plate 6547 extends into the introduction hole 6556 for engagement and can drive the second clamping block 655 to slide; the side wall of the guide slide plate 6547 abuts the inner circumference of the introduction hole 6556, and there is no gap between the guide slide plate 6547 and the introduction hole 6556, which can prevent the first clamping block 655 from displacing in the axial direction relative to the second clamping block 655, so that the movable block 653 can be driven to the appropriate position and positioned more conveniently and accurately. Place the two guide rails 651 between the first housing 611 and the second housing 613, with the connecting post 6545 of the first clamping block 654 facing the strip-shaped opening 6116 of the first housing 611. Insert the second support piece 6113 of the first housing 611 into the guide slot 6642 of the rotating post 664, and insert the two third support pieces 6115 into the two guide slots 6625 of the first rotating member 662. At this point, the slider 6542 and connecting post 6545 are both inserted into the strip-shaped opening 6116, allowing the slider 6542 to slide axially along the strip-shaped opening 6116. The two latching teeth 6544 of the first clamping block 654 correspond to the two racks 6117, respectively. Slide the two connecting blocks 6564 of the button 656 onto the two connecting posts 6545, exposing the recess 6561 of the button 656 outside the first housing 611, allowing the button 656 to slide along the strip-shaped opening 6116.

[0141] Sleeve the sleeve 6165 onto the distal end of the cap body 6160, specifically, snap-fit the pair of protrusions 6167 of the sleeve 6165 onto the snap-fit ring 6163 of the cap body 6160; snap-fit the end cover 616 onto the distal end of the second rotating member 670, specifically, insert the annular protrusion 6705 into the annular groove 6162 of the cap body 6160, and snap-fit the two hooks 6707 onto the two clamping blocks 6164 respectively, so that the end cover 616 is fixed to the second rotating member 670, and the axial center line of the through hole 6161 of the end cover 616 coincides with the axial center line of the through hole 6701 of the second rotating member 670. In other embodiments, the hook 6707 of the second rotatable member 670 and the block 6164 of the cap body 6160 can be omitted. The annular tab 6705 of the second rotatable member 670 can be rotatably inserted into the annular groove 6162 of the cap 6160, so that the end cap 616 is rotatably connected to the distal end of the second rotatable member 670. The proximal end of the push tube 684 is passed through the through hole 6161 of the end cap 616 and then fixed to the through hole 6701 of the second rotatable member 670. Specifically, the external thread of the push tube 684 is screwed to the internal thread 6708 of the second rotatable member 670. In other embodiments, the proximal end of the push tube 684 can be fixed to the through hole 6161 by welding, gluing, or clamping.

[0142] Pass the distal end of the pushing member 682 from the proximal end of the second rotating member 670 through the through hole 6701 and the pushing tube 684, so that the second rotating member 670 slides to the distal end of the first shell 611, and insert the two first support plates 6112 of the first shell 611 into the two guide grooves 6706 of the second rotating member 670 respectively; connect the second shell 613 to the first shell 611, and the snap hooks 6131 of the second shell 613 are respectively snapped into the snap plates 6118 of the first shell 611. At this point, the two fourth support pieces 6132 of the second housing 613 are respectively inserted into the two guide slots 6706 of the second rotating member 670, the fifth support piece 6133 is received in the guide slot 6642 of the rotating post 664, the two sixth support pieces 6135 are respectively inserted into the two guide slots 6625 of the first rotating member 662, and the two guide rails 6136 are respectively received in the two slide slots 6552 of the second clamping block 655. The elastic member 658 pushes the teeth 6544 of the first clamping block 654 to engage with the rack 6117, and the operating portion 6702 of the second rotating member 670 is exposed outside the first housing 61. The external buckle plate 615 is then snapped into the mounting opening 6138 of the second housing 613. Specifically, the positioning posts 6151 of the external buckle plate 615 are snapped into the corresponding holes in the positioning blocks 6137, and the hooks 6153 are snapped into the corresponding holes 6139. Installation is complete.

[0143] When the pushing device is used, the button 656 is pressed to move the first clamping block 654 toward the second clamping block 655, and the elastic member 658 is elastically deformed until the movable block 653 is clamped and positioned by the first clamping block 654 and the second clamping block 655. The latching teeth 6544 of the first clamping block 654 are separated from the rack 6117, and the button 656 is slid toward the proximal or distal end along the strip-shaped opening 6116 of the first housing 611, so that the movable block 653 slides toward the proximal or distal end along with the first clamping block 654 and the second clamping block 655. When the push member 682 slides to a suitable position, the button 656 is pressed, and the elastic member 658 elastically resets to push the first clamping block 654 away from the second clamping block 655, until the tooth 6544 of the first clamping block 654 is engaged with the rack 6117, positioning the sliding member 650 to prevent the movable block 653 from sliding in the axial direction, thereby axially positioning the push member 682. When it is necessary to rotate the push member 682, the button 656 is released, causing the first clamping block 654 to move away from the second clamping block 655, and rotating the first rotating member 662, thereby driving the guide rail 651, the movable block 653, and the rotating column 664 to rotate. That is, the movable member 653 can rotate within the clamping groove formed by the first clamping groove 6548 of the first clamping block 654 and the second clamping groove 6558 of the second clamping block 655, with the axis of the push member 682 as the rotation axis, thereby driving the push member 682 to rotate relative to the push tube 684. When it is necessary to rotate the push tube 684, the operating portion 6702 of the second rotating member 670 is rotated to rotate the second rotating member 670 with the axis of the push member 682 as the rotation axis. Since the proximal end of the push tube 684 is fixed in the through hole 6701 of the second rotating member 670, the push tube 684 rotates with the second rotating member 670.

[0144] The sliding mechanism 65 of the pushing device 60 can drive the pushing member 682 to slide axially, thereby facilitating the change of the position of the occluder fixed to the distal end of the pushing member 682 in the blood vessel, and can control the release speed of the occluder. When the pushing member 682 transports the occluder to a suitable position, the button 656 is released, and the first clamping block 654 moves toward the first shell 611 under the reset force of the elastic member 658, so that the locking tooth 6544 engages with the rack 6117 to achieve the positioning of the pushing member 682 and the occluder. Therefore, the sliding mechanism 65 can conveniently and reliably move and position the occluder.

[0145] In other embodiments, the first support piece 6112 and the fourth support piece 6132 can be protruded from the outer peripheral surface of the rotating portion 6704 of the second rotating member 670, and the annular guide groove 6706 can be opened on the inner walls of the first shell 611 and the second shell 613; the second support piece 6113 and the fifth support piece 6133 can be protruded from the outer peripheral surface of the rotating column 664, and the guide groove 6642 can be opened on the inner walls of the first shell 611 and the second shell 613; the third support piece 6115 and the sixth support piece 6135 can be protruded from the outer peripheral surface of the rotating portion 6704, and the annular guide groove 6706 can be opened on the inner walls of the first shell 611 and the second shell 613.

[0146] During interventional surgery, the occluder locking system first determines the puncture position and after the puncture is completed, the distal end of the expansion rod 32 of the dilator 30 is inserted from the proximal end of the sheath adjustable bending device 20 through the proximal cap 218, the sealing ring 219 and the positioning tube 217 into the sheath 23 and exposed at the distal end of the sheath. Because the distal end of the dilator 30 is a cone-like structure with a gradually decreasing diameter, under the development effect of the imaging instrument, the surgeon can easily guide the sheath to the vicinity of the lesion position with the help of the distal structure of the dilator 30. After reaching the vicinity of the lesion position, the dilator 30 is withdrawn, leaving the sheath The tube 23 is inserted into the body to establish a passage from the outside to the inside of the body; the distal end of the pushing assembly 68 of the pushing device 60 is passed through the sealing seat 44 of the loader 40 and the loading tube 42, and then the distal ends of the pushing member 682 and the distal ends of the pushing tube 684 are matched and fixed to the occluder 10 at the same time, that is, the protrusion 15 is screwed and fixed to the pushing tube 684 and the connecting bolt 112 is screwed and fixed to the pushing member 682, and the relative position of the pushing member 682 and the pushing tube 684 is changed to stretch the occluder 10 in the axial direction so that the occluder 10 is easily received in the inner cavity of the loading tube 42 of the loader 40 ; Insert the distal end of the loading tube 42 through the cap 218, the sealing ring 219 and the positioning tube 217 into the sheath 23 to obtain a delivery system for the loaded occluder 10; hold the first shell 61 of the pushing device 60 and push the pushing assembly 68 to the distal end to deliver the occluder 10 to the distal end port of the sheath 23 of the sheath adjustable bending device 20, rotate the sheath adjustable bending device 20 and the elastic section 235 of the bending sheath 23 so that the elastic section 235 of the sheath 23 is facing the crack at the lesion position, and slowly push the button 656 of the delivery device 60 to push the detachable fixed occluder 10 The push piece 682 and the push tube 684 move toward the direction of the rupture to expose the occluder 10 from the sheath 23, and the occluder 10 is released to the appropriate position of the rupture; the button 656 of the sliding conveying device 60 causes the push piece 682 to slowly move axially toward the proximal direction, so that the first occluding part 11 and the second occluding part 15 of the occluder 10 are located at both ends of the rupture, and under the action of the sliding mechanism 65, the first rotating mechanism 66 and the second rotating mechanism 670 of the conveying device 60, the occluder 10 is locked to the rupture and the push piece 682 and the push tube 684 are separated from the occluder 10.

[0147] Please also refer to Figures 1 to 58 The following describes the locking process of the occluder 10 and the separation process of the pushing member 682 and the pushing tube 684 from the occluder 10 of the occluder locking system of the first embodiment:

[0148] Step 1: Engage the nut 689 in the engagement groove 6846 of the extension section 6843. The third external thread 6822 of the push member 682 is threadedly secured to the thread 115 of the connecting bolt 112. The second internal thread 6842 of the push tube 684 is secured to the second external thread 154 of the protrusion 152. Preferably, the external thread of the protrusion 152 reaches the proximal end of the push tube 684 and abuts against the engagement groove 6846.

[0149] Step 2: Slide button 656 axially toward the proximal end, driving pusher 682 to slide axially toward the proximal end, causing the first external thread 113 of connecting bolt 112 to abut against nut 689. Release button 656, causing elastic member 658 to elastically return to its original position, pushing first clamping block 654 to move radially until the teeth 6544 of first clamping block 654 engage with rack 6117, thereby securing the position of connecting bolt 112. Rotate operating portion 6702 of second rotating member 670 axially, driving pusher tube 684 to rotate and distally unscrew protrusion 152. Since the threaded fastening direction of pusher tube 684 and protrusion 152 is opposite to the fastening direction of connecting bolt 112 and nut 689, pusher tube 684 drives nut 689 in engagement groove 6846 to rotate, tightening connecting bolt 112 proximally, thereby securing connecting bolt 112 to nut 689. When the pitch and teeth of the second internal thread 6842 of the push tube 684 are consistent with those of the nut 689, when the protrusion 152 is screwed out of the push tube 684, the nut 689 is also completely sleeved on the connecting bolt 112; when the pitch and teeth of the second internal thread 6842 of the push tube 684 are greater than those of the nut 689, the protrusion 152 is screwed out of the push tube 684, the nut 689 is also completely sleeved on the connecting bolt 112, and the connecting bolt 112 is exposed from the proximal end of the nut 689.

[0150] Step 3: Press the button 656 to separate the latching tooth 6544 from the rack 6117, and slide the button 656 axially toward the distal end to drive the pushing member 682 to slide axially toward the distal end, pushing the nut 689 out of the engaging groove 6846 and abutting against the distal end surface of the protrusion 152. Preferably, with the help of a developing instrument, observe whether the connecting bolt 112 is exposed from the proximal end of the nut 689. If not, slide the sliding push member 682 proximally in the axial direction and drive the nut 689 to abut the push tube 684, rotate the push tube 684 in the opposite direction to tighten the push tube 684 and the protrusion 152, and at the same time separate the connecting bolt 112 from the nut 689, and perform the second step until the proximal end of the connecting bolt 112 is observed to be exposed from the nut 689 under the developing instrument; if the connecting bolt 112 is observed to be exposed from the proximal end of the nut 689, it can be determined that the thread of the nut 689 has been completely screwed into the connecting bolt 112, so that the connecting bolt 112 and the nut 689 are well fixed, and the risk of the nut 689 falling off due to partial thread of the nut 689 being screwed into the connecting bolt 112, resulting in poor fixation of the connecting bolt 112 and the nut 689, can be avoided. The first rotating member 662 is then rotated to drive the pushing member 682 to rotate so that the pushing member 682 is separated from the connecting bolt 112. In this way, the occluder 10 is locked.

[0151] From the above three steps, it can be seen that the push tube 684 is threadedly connected to the protrusion 152 of the occluder 10, the connecting bolt 112 is provided with internal and external threads and the connecting bolt 112 is threadedly fixed to the pushing member 682. The locking of the occluder 10 only requires sliding the pushing member 682 axially in the proximal direction, so that the first external thread 113 of the connecting bolt 112 is abutted against the internal thread of the nut 689 engaged with the engaging groove 6846 of the pushing tube 684, and then the pushing tube 684 is rotated to drive the nut 689 to screw into the connecting bolt 112 to complete the locking of the occluder 10. Because the threaded fastening direction of the push tube 684 and the protrusion 152 is opposite to the fastening direction of the connecting bolt 112 and the nut 689, and the threads and pitch of the extension section 6843 and the protrusion 152 are equal to or greater than those of the nut 689, the protrusion 152 of the occluder 10 is simultaneously screwed out of the push tube 684 as the nut 689 is screwed into the connecting bolt 112, thereby separating the protrusion 152 from the push tube 684. Finally, the push member 682 is rotated to separate it from the connecting bolt 112, thereby separating the occluder 10 from the push assembly 68. By observing with a developing instrument, it can be confirmed whether the proximal end of the connecting bolt 112 is exposed from the nut 689. The push assembly 68 and the occluder 10 can be re-tightened repeatedly until the proximal end of the connecting bolt 112 is exposed from the nut 689, thereby ensuring that the occluder 10 is fully locked. It can be seen that the occluder locking system has the advantages of easy operation and high reliability in separation and fastening.

[0152] See also Figure 59The structure of the occluder locking system provided in the second embodiment of the present invention is similar to that of the first embodiment, except that the push tube 684a of the push device 60 in the second embodiment has a slightly different structure from the push tube 684 in the first embodiment. In the second embodiment, an idle groove 6847 is provided on the inner wall of the extension section 6843 of the push tube 684a between the second internal thread 6842 and the engaging groove 6846. When the protrusion 152 is connected to the push tube 684, the second external thread 154 of the protrusion 152 can rotate within the idle groove 6847. Specifically, the second internal thread 6842 of the extension section 6843 does not extend proximally to the engaging groove 6846. That is, the inner wall of the extension section 6843 adjacent to the engaging groove 6846 is not provided with an internal thread. The inner diameter of the idle groove 6847 is consistent with the outer diameter of the protrusion 152, and the axial length of the idle groove 6847 is no less than the axial extension length of the second external thread 154 of the protrusion 152.

[0153] Please also refer to Figures 60 to 64 The following describes the locking process of the occluder 10 and the separation process of the pushing member 682 and the pushing tube 684a from the occluder 10 of the occluder locking system of the second embodiment as follows:

[0154] Step 1: Engage the nut 689 in the engagement groove 6846 of the extension section 6843. The third external thread 6822 of the push member 682 is threadedly secured to the thread 115 of the connecting bolt 112. The second external thread 154 of the protrusion 152 is threadedly engaged with the second internal thread 6842 of the push tube 684. The push tube 684 is then rotated to drive the protrusion 152 into the idle groove 6847 of the push tube 684. Preferably, the protrusion 152 reaches the point where the external thread at the proximal end of the push tube 684 abuts against the engagement groove 6846.

[0155] Step 2: Slide button 656 axially toward the proximal end, driving pusher 682 to slide axially toward the proximal end, causing the first external thread 113 of connecting bolt 112 to abut and engage with the internal thread of nut 689. Release button 656, and elastic member 658 elastically returns to its original position, pushing first clamping block 654 to move radially until the teeth 6544 of first clamping block 654 engage with rack 6117, thereby securing the position of connecting bolt 112. By continuously rotating operating portion 6702 of second rotating member 670, second rotating member 670 rotates axially, driving pusher tube 684 to rotate continuously. Protrusion 152 rotates idly within idle groove 6847, adjusting the relative position of connecting bolt 112 and nut 689 so that the first external thread 113 of connecting bolt 112 fully abuts with the internal thread of nut 689, allowing connecting bolt 112 to be smoothly screwed into nut 689. At this time, the push tube 684 drives the nut 689 in the engaging groove 6846 to rotate together so that the connecting bolt 112 is tightened in the proximal direction, and the connecting bolt 112 and the nut 689 are fastened.

[0156] Step 3: Slide the pusher 682 axially toward the distal end, pushing the nut 689 out of the engagement groove 6846 and into contact with the distal end surface of the protrusion 152. With the aid of a developing instrument, observe whether the connecting bolt 112 is exposed from the proximal end of the nut 689. If not, slide the pusher 682 axially toward the proximal end, driving the nut 689 to abut against the push tube 684. Rotate the push tube 684 in the opposite direction to tighten the push tube 684 and the protrusion 152, while separating the connecting bolt 112 from the nut 689. The second step is then performed until the proximal end of the connecting bolt 112 is exposed from the nut 689 under observation of the developing instrument. If the connecting bolt 112 is observed to be exposed from the proximal end of the nut 689, it can be determined that the threads of the nut 689 are fully screwed into the connecting bolt 112, ensuring a good fixation between the connecting bolt 112 and the nut 689. This avoids the risk of the nut 689 falling off due to a partial screwing of the nut 689 into the connecting bolt 112, which may result in a poor fixation between the connecting bolt 112 and the nut 689. The first rotating member 662 is then rotated to drive the pushing member 682 to rotate so that the pushing member 682 is separated from the connecting bolt 112. In this way, the occluder 10 is locked.

[0157] From the locking process of the occluder 10 and the process of disengaging the pusher 682 and push tube 684a from the occluder 10 in the occluder locking system of the second embodiment, it can be seen that because the inner wall of the extension section 6843 of the push tube 684 is provided with an idle groove 6847 between the second internal thread 6842 and the engaging groove 6846, during the adjustment of the relative position of the connecting bolt 112 and the nut 689, the protrusion 152 idles within the idle groove, rather than rotating within the second internal thread 6842 of the extension section 6843 and unscrewing the push tube 684 as in the occluder locking system of the first embodiment. Because the dimensions of the connecting bolt 112, the protrusion 152, the nut 689, and the engaging groove 6842 of the extension section 6843 are very small, typically measuring a few millimeters, some dimensional errors are unavoidable when manufacturing the connecting bolt 112, the nut 689, and the engaging groove 6864 using most commonly used manufacturing techniques. When the sliding push member 682 slides axially toward the proximal end so that the first external thread 113 of the connecting bolt 112 is abutted against the nut 689 for connection, at this time, the relative position of the connecting bolt 112 and the nut 689 may be that the connecting bolt 112 and the nut 689 just allow the nut 689 to be screwed into the connecting bolt 112, or the threads of the connecting bolt 112 and the nut 689 are not completely abutted. The relative position of the connecting bolt 112 and the nut 689 needs to be adjusted to make the first external thread 113 of the connecting bolt 112 and the internal thread of the nut 689 completely abut against each other, so that the nut 689 can be screwed into the first external thread 113. Therefore, the idle groove 6847 provided in the extension section 6843 makes the interaction between the push tube 684 and the protrusion 152 almost negligible during the process of adjusting the relative position of the connecting bolt 112 and the nut 689, which is much smaller than the thread rotation friction force suffered by the threaded rotation connection between the push tube 684 and the protrusion 152 during the process of adjusting the relative position of the connecting bolt 112 and the nut 689 in the occluder locking system of the first embodiment. On the one hand, it is convenient to adjust the relative position of the connecting bolt 112 and the nut 689 to achieve the position where the nut 689 can be screwed into the connecting bolt 112; on the other hand, in the first embodiment, The internal thread in the extension section 6843 of the occluder locking system, which abuts against the locking groove 6846, can also adjust the relative positions of the connecting bolt 112 and the nut 689 during the process of the protrusion 152 being screwed out of the extension section 6843. However, this requires that the length of the protrusion 152 be made longer so that the protrusion 152 can be threadedly rotated for a longer time in the extension section 6843 to adjust the relative positions of the connecting bolt 112 and the nut 689. However, the longer protrusion 152 will remain at the rupture position after the interventional surgery is completed, which will affect the blood flow inside the peripheral blood vessels or the heart, and increase the risk of postoperative complications.In the occluder locking system of the second embodiment, since an idle groove 6847 is provided in the extension section 6843, the relative position of the connecting bolt 112 and the nut 689 can be adjusted to achieve a position where the nut 689 can be screwed into the connecting bolt 112, and the relative position of the protrusion 152 and the extension section 6843 does not change. This can greatly shorten the length of the protrusion 152, thereby reducing the distance that the occluder 10 is exposed from the vascular wall or heart wall at the rupture site after the operation is completed, thereby greatly reducing the risk of postoperative complications.

[0158] See also Figure 65 and Figure 66The structure of the occluder locking system provided by the third embodiment of the present invention is similar to that of the first embodiment, except that: the third embodiment has a third internal thread 6848 formed on the inner wall of the engaging groove 6846 on the proximal end of the extension section 6843. The nut 689a is a cylindrical nut with a fourth external thread formed on its sidewall, which is threadably connected to the third internal thread 6848. The fourth external thread and the third internal thread 6848 of the nut 689a are tightened in the same direction as the second internal thread 6842 and the second external thread 154, and are tightened in the opposite direction as the fourth internal thread of the nut 689a and the fourth internal thread 6848 of the nut 689a. Specifically, the engaging groove 6846 on the proximal end of the extension section 6843 is a circular hole, i.e., the radial cross-section of the engaging groove 6846 is circular, and the inner wall of the engaging groove 6846 is provided with the third internal thread 6848. Nut 689a is cylindrical, with an outer diameter that matches the inner diameter of the engaging groove 6846. The sidewall of nut 689a is provided with a fourth external thread that matches the third internal thread 6848. The tightening direction of the third internal thread 6848 on the inner wall of the engaging groove 6846 and the fourth external thread of nut 689a is the same as the tightening direction of the second internal thread 6842 of the extension section 6843 and the second external thread 154 of the protrusion 152. The tightening direction of the third internal thread 6848 on the inner wall of the engaging groove 6846 and the external thread of nut 689a is opposite to the tightening direction of the first external thread 113 of the connecting bolt 112 and the internal thread of nut 689a. Preferably, the pitch, teeth and overall length of the second internal thread 6842 of the inner wall of the engaging groove 6846, the internal and external threads of the nut 689a and the first external thread 113 of the connecting bolt 112 are consistent; when the push tube 684 is rotated to screw the nut 689a into the connecting bolt 112 to complete the threaded connection between the nut 689a and the connecting bolt 112, the protrusion 152 and the extension section 6843 can be separated, and the nut 689a and the engaging groove 6846 can be separated at the same time; in addition, because the engaging groove 6846 and the nut 689a are threadedly connected, rather than being connected to the engaging groove 6846 by a regular shape like a hexagonal nut, etc. The engagement causes a dimensional error between the nut 689 and the engagement groove 6846, which can greatly reduce the risk of the sliding pusher 682 sliding axially toward the proximal end so that the first external thread 113 of the connecting bolt 112 abuts against the internal thread of the cylindrical nut 689a and the need to adjust the relative positions of the connecting bolt 112 and the nut 689a again. That is, the reliability of the sliding pusher 682 sliding axially toward the proximal end so that the first external thread 113 of the connecting bolt 112 abuts against the internal thread of the cylindrical nut 689a is improved, the step of adjusting the relative positions of the connecting bolt 112 and the nut 689a is avoided, the length of the protrusion 152 can be reduced, and the operation steps are simplified.

[0159] The locking process of the occluder 10 and the separation process of the pushing member 682 and the pushing tube 684 from the occluder 10 of the occluder locking system of the third embodiment are similar to those of the first embodiment.

[0160] like Figure 67 As shown, the occluder locking system of the present invention further provides an occluder locking method, including pre-locking processing, locking processing and post-locking processing; wherein the pre-locking processing includes:

[0161] S11 provides an occluder 10, a pushing device 60, and an adjustable sheath bending device 20. The occluder 10 includes a nut 689 and a first blocking portion 11 and a second blocking portion 15 connected to each other. The first blocking portion 11 is provided with a connecting bolt 112 at the distal end, and the second blocking portion 15 is provided with a protruding portion 152 at the proximal end. The pushing device 60 includes a pushing tube 684 and a pushing member 682. The adjustable sheath bending device 20 includes a sheath 23.

[0162] S12: Engage the nut 689 with the distal end of the push tube 684, thread the connecting bolt 112 with the push member 682, and thread the protrusion 152 with the push tube 684. Drive the push member 682 to stretch the occluder 10, place it in the sheath 23, and release the occluder 10.

[0163] Locking treatment includes:

[0164] S21 drives the pushing member 682 to make the connecting bolt 112 abut against the nut 689;

[0165] S22: Rotate the push tube 684 to threadably connect the connecting bolt 112 and the nut 689; at the same time, separate the push tube 684 and the occluder 10, and expose the proximal end of the connecting bolt 112 to the nut 689.

[0166] Post-locking processing includes:

[0167] S31: Drive the pusher 682 to move the nut 689 away from the push tube 684, and observe whether the proximal end of the connecting bolt 112 is exposed from the nut 689. If not, drive the pusher 682 to engage the nut 689 with the push tube 684, and rotate the push tube 684 in the opposite direction to thread the push tube 684 and the protrusion 152, while separating the connecting bolt 112 from the nut 689.

[0168] S32: Repeat steps S21, S22, and S31 until the proximal end of the connecting bolt 112 is observed to be exposed from the nut 689;

[0169] S32 The connecting bolt 112 and the nut 689 are separated.

[0170] The locking method of the occluder locking system specifically includes the following steps during actual use:

[0171] Pre-locking treatment includes:

[0172] S11 provides an occluder 10, a pushing device 60, and an adjustable sheath bending device 20. The occluder 10 includes a nut 689 and a first occluding portion 11 and a second occluding portion 15 connected to each other. The distal end of the first occluding portion 11 is provided with a connecting plug 112, and the proximal end of the second occluding portion 15 is provided with a protruding portion 152. The pushing device 60 includes a pushing tube 684 and a pushing member 682. The adjustable sheath bending device 20 includes a sheath 23. Percutaneous puncture is performed to complete the sheath access to the lesion.

[0173] S12: Engage the nut 689 with the distal end of the push tube 684, thread the connecting bolt 112 with the push member 682, and thread the protrusion 152 with the push tube 684. Drive the push member 682 to stretch the occluder 10 and place it inside the sheath. Under the pushing action of the push member 682, the first occluding portion 11 and the second occluding portion 15 of the occluder 10 are released and positioned at both ends of the rupture.

[0174] Locking treatment includes:

[0175] S21: Slide the pushing member 682 to move the first blocking portion 11 closer to the second blocking portion 15. The first blocking portion 11 and the second blocking portion 15 are both in close contact with the breach. At this time, the connecting bolt 112 has abutted against the nut 689.

[0176] S22: Rotate the push tube 684 to threadably connect the connecting bolt 112 and the nut 689; at the same time, separate the push tube 684 and the occluder 10, and expose the proximal end of the connecting bolt 112 to the nut 689.

[0177] Post-locking processing includes:

[0178] S31: Drive the pusher 682 to move the nut 689 away from the push tube 684, and observe whether the proximal end of the connecting bolt 112 is exposed from the nut 689. If not, drive the pusher 682 to engage the nut 689 with the push tube 684, and rotate the push tube 684 in the opposite direction to thread the push tube 684 and the protrusion 152, while separating the connecting bolt 112 from the nut 689.

[0179] S32: Repeat steps S21, S22, and S31 until the proximal end of the connecting bolt 112 is observed to be exposed from the nut 689;

[0180] S32: Rotate the pusher 682 to separate the connecting bolt 112 from the nut 689. S33: Remove the pusher tube 684 and the pusher 682, remove the sheath tube 23, and suture the wound.

[0181] The present invention provides a method for locking the occluder 10 during interventional surgery. Because the occluder 10 utilizes a securely fixed locking mechanism using a connecting bolt 112 and a nut 689, during the process of threaded connection and locking between the connecting bolt 112 and the nut 689, the push tube 684 and the occluder 10 are simultaneously separated, allowing the proximal end of the connecting bolt 112 to be exposed through the nut 689. This prevents the separation of the pusher 682 and the push tube 684 from the occluder 10 from adversely affecting the already locked structure of the occluder 10. Furthermore, because the proximal end of the connecting bolt 112 is exposed through the nut 689, this structure can be observed under a developing instrument. If this structure is not observed, it indicates that the occluder 10 is not fully locked. In this case, the pushing bolt 682 and the push tube 684 can be repeatedly operated to re-lock the occluder 10 until the proximal end of the connecting bolt 112 is exposed through the nut 689, ensuring that the occluder 10 is fully locked. Therefore, the locking method of the occluder 10 provided by the present invention has the advantages of simple operation and reliable locking.

[0182] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An occluder, comprising a first occluding portion and a second occluding portion, characterized in that: A connecting bolt is provided at the distal end of the first blocking portion along the direction of the second blocking portion, a first external thread is provided on the side wall of the connecting bolt, a protrusion is provided at the proximal end of the second blocking portion, a through hole is provided on the protrusion, a second external thread is provided on the side wall of the protrusion, the second external thread is used to correspond to the second internal thread provided on the inner wall of the distal end of the push tube, a nut is provided in the distal end of the push tube, the thread direction of the first external thread is opposite to the thread direction of the second external thread, the proximal end of the connecting bolt can pass through the through hole and be screwed to the nut through the first external thread.

2. The occluder according to claim 1, characterized in that: The first external thread is a left-hand thread or a right-hand thread, the second external thread is a right-hand thread or a left-hand thread, and the effective thread length of the connecting bolt is greater than or equal to the effective thread length of the nut.

3. The occluder according to claim 1, characterized in that: The proximal end of the connecting bolt is provided with a screw hole along the distal direction, and the screw hole is used for being detachably connected to the distal end of the pushing member.

4. The occluder according to claim 3, characterized in that: A first internal thread is provided on the inner wall of the screw hole, and a third external thread is provided on the distal end of the pushing member. The first internal thread can be threadably connected to the third external thread.

5. The occluder according to claim 1, characterized in that: The first blocking portion and the second blocking portion are both woven from metal wires. The first blocking portion and the second blocking portion are in a double-layer disc arc surface structure with an internal space, and the connecting bolt is located in the internal space.

6. The occluder according to claim 5, characterized in that: The distal end of the connecting bolt is radially protruded with a positioning disk.

7. The occluder according to claim 5, characterized in that: An inner sleeve is provided at the proximal end of the second sealing part, the inner sleeve is located inside the second sealing part, the distal end of the protruding part extends into the second sealing part, and the proximal end of the metal wire is folded inwardly and positioned between the inner sleeve and the protruding part.

8. An occluder locking system, characterized in that: It comprises a pushing device and an occluder as described in any one of claims 1 to 7, the pushing device comprising a first shell having an accommodating space, a first control component partially placed in the first shell, a second control component partially sleeved on the first shell, and a pushing component, the pushing component comprising the pushing tube and a pushing member sleeved in the pushing tube, the inner wall of the distal end of the pushing tube is provided with a second internal thread which can be matched with the second external thread, the first control component can drive the pushing member to slide back and forth to drive the proximal end of the connecting bolt detachably connected to the pushing member to abut against or away from the nut, the first control component can drive the pushing member to rotate, the second control component can drive the pushing tube to rotate, and the tightening direction of the first external thread and the nut is opposite to the tightening direction of the protrusion and the pushing tube.

9. The occluder locking system according to claim 8, characterized in that: The push tube includes a main body section and an extension section arranged at the distal end of the main body section. The nut can be engaged and disengaged from the extension section. The second internal thread is arranged on the inner wall of the extension section. The push member can pass through the nut and the extension section.

10. The occluder locking system according to claim 9, characterized in that: The inner diameter of the extension section is greater than the inner diameter of the main body section, and the nut can abut against the distal end port of the main body section.

11. The occluder locking system according to claim 9, characterized in that: A locking groove is provided at the proximal end of the inner wall of the extension section, and the nut can be locked in and disengaged from the locking groove.

12. The occluder locking system according to claim 11, characterized in that: An idle groove is provided on the inner wall of the extension section between the second internal thread and the engaging groove, and the second external thread of the protruding portion can rotate in the idle groove.

13. The occluder locking system according to claim 12, characterized in that: An axial length of the idle groove is not less than an axial extension length of the second external thread of the protruding portion.

14. The occluder locking system according to claim 11, characterized in that: The inner wall of the locking groove is provided with a third internal thread, the nut is cylindrical, and the side wall of the nut is provided with a fourth external thread, the fourth external thread of the nut can be screwed to the third internal thread, the tightening direction of the fourth external thread and the third internal thread is the same as the thread tightening direction of the second internal thread and the second external thread, and the tightening direction of the fourth external thread and the third internal thread is opposite to the tightening direction of the first external thread and the nut.

15. The occluder locking system according to claim 8, characterized in that: The first control component includes a sliding mechanism, which can drive the pushing member to slide back and forth in the pushing tube; the second control component includes a second rotating mechanism, which can drive the pushing tube to rotate, so that the connecting bolt can be screwed to the nut while the second external thread of the protrusion is separated from the second internal thread of the pushing tube.

16. The occluder locking system according to claim 15, characterized in that: The sliding mechanism includes a guide rail extending axially in the first shell, a movable block passing through the guide rail, and a sliding member that can drive the movable block to slide along the guide rail. The proximal end of the pushing member is fixed to the movable block. When driven by the sliding member, the movable block slides along the guide rail to drive the pushing member to slide.

17. The occluder locking system according to claim 16, characterized in that: The sliding member includes a first clamping block and a second clamping block. The first clamping block can approach or move away from the second clamping block. The opposite sides of the first clamping block and the second clamping block are concave to form a clamping groove. The movable block can be rotatably engaged in the clamping groove. An elastic member is arranged between the first clamping block and the second clamping block. The elastic member can make the first clamping block move away from the second clamping block.

18. The occluder locking system according to claim 17, characterized in that: A strip-shaped opening is provided on the inner wall of the first shell, and a rack is provided on at least one side of the strip-shaped opening. The first clamping block is provided with a latching tooth relative to the inner wall of the strip-shaped opening. The elastic member can elastically push the first clamping block so that the latching tooth is engaged with the rack to lock the pushing member, and press the first clamping block toward the second clamping block so that the latching tooth is separated from the rack so that the sliding member can drive the movable block to slide.

19. The occluder locking system according to claim 17, characterized in that: The first clamping block is provided with a first clamping groove facing the inner wall of the movable block, and the second clamping block is provided with a second clamping groove facing the inner wall of the movable block. The first clamping groove and the second clamping groove form the clamping groove for accommodating the movable block, and the movable block is engaged with the clamping groove in the axial direction, driving the sliding member to move and drive the movable block to slide.

20. The occluder locking system according to claim 17, characterized in that: The second clamping block is provided with a guide sliding hole, and the first clamping block is provided with a guide sliding column that can extend into the guide sliding hole. The elastic member is a spring sleeved outside the guide sliding column. The first clamping block approaches or moves away from the second clamping block along the guide sliding column. The first clamping block is also provided with a guide sliding plate, and the second clamping block is provided with an introduction hole. The first clamping block approaches the second clamping block so that the guide sliding plate extends into the introduction hole for engagement and can drive the second clamping block to slide.

21. The occluder locking system according to claim 17, characterized in that: The second clamping block is provided with a sliding groove along the axial direction near the side wall of the first shell, and a guide rail is provided at a position of the first shell opposite to the sliding groove, and the second clamping block can slide along the guide rail.

22. The occluder locking system according to claim 15, characterized in that: The second rotating mechanism includes a second rotating member rotatably disposed at the distal end of the first housing. A through hole is axially defined in the middle of the second rotating member. The second rotating member and the push tube are threadedly fixed in the through hole.

23. The occluder locking system according to claim 8, characterized in that: It also includes a sheath adjustable bending device, which includes a second shell, a sheath and an adjusting mechanism. The sheath includes a flexible distal end. The adjusting mechanism includes an adjusting member, a driving member for driving the adjusting member to move axially, and two traction wires. The distal ends of the two traction wires are axially slidably passed through different positions in the side wall of the sheath and are respectively connected to the distal ends of the sheath. A winding portion is provided in the second shell, wherein the proximal end of one of the traction wires is connected to the adjusting member, and the proximal end of the other traction wire is connected to the adjusting member after bypassing the winding portion. The driving member can drive the adjusting member to move and drive the two traction wires to slide so that the flexible distal end bends in different directions.

24. The occluder locking system according to claim 23, characterized in that: A bending-assisting groove is provided on the side wall of the elastic section of the sheath tube corresponding to the traction wire.

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