Conveying device

Abstract

This invention belongs to the field of medical device technology, specifically relating to a delivery device. The delivery device of this invention includes a sheath assembly, a bending assembly, a moving assembly, and a clutch sleeve. The sheath assembly includes a sheath and a traction wire connected to the distal end of the sheath. The bending assembly includes a bending handle and a bending connector. The bending handle is sleeved outside the sheath, and the bending connector is rotatably connected to the bending handle and can move relative to the sheath along the axial direction of the sheath. The moving assembly is arranged back-and-forth along the axial direction of the sheath with the bending assembly. The moving assembly includes a moving handle and a moving connector. The moving handle is sleeved outside the sheath, and the moving connector is fixed relative to the sheath but rotatably connected to the moving handle. The clutch sleeve is disposed between the bending handle and the moving handle and can move back-and-forth along the axial direction of the sheath. The clutch sleeve has a first state where the bending handle and the moving handle are separated before movement and a second state where the bending handle and the moving handle are engaged after movement.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a delivery device. Background Technology

[0002] In recent years, interventional treatment of cardiovascular diseases has become an important means of curing patients. With the continuous development of interventional technology, the advantages of using covered stents to treat aortic aneurysms and aortic dissections have become increasingly prominent. Covered stents are artificial blood vessels adapted to the size of the blood vessel. They mainly consist of a covering and a supporting stent. The covering is generally made of polyester or e-PTFE membrane, and the supporting stent is mainly woven from stainless steel wire or nickel-titanium alloy wire. The procedure for using covered stents involves first compressing the stent into the sheath of the stent delivery device. The blood vessel is usually punctured at the femoral or iliac artery. Using the guidewire to establish a track and the sheath's own bending function, the delivery device is used to establish a delivery path through the iliac artery—abdominal aorta—thoracic aorta—aortic arch—ascending aorta, and then delivered to the designated location of the lesion. The stent is then released, and after release, it adheres tightly to the aneurysm wall. The stent's covering isolates blood flow from the lesion site, eliminating the impact of blood flow on the aneurysm wall and establishing a channel for normal blood circulation. Finally, the guidewire and delivery device are withdrawn, achieving interventional treatment for aneurysms and aortic dissections.

[0003] Common adjustable bending support conveyors have too many parts and a complex structure, resulting in low reliability. Some products do not consider the influence of the traction wire on the handle movement. When the support is released, the bending joint and the sheath joint move relative to each other, causing the traction wire to bend under force, which may lead to uncontrollable risks during the support release process. In some products, the sheath bending and support release functions are independent and not synchronized. If the bending function is affected when the support is released, it may cause inaccurate support positioning. Summary of the Invention

[0004] The objective of this invention is to at least solve the problem of difficulty in the retraction process caused by deformation of the sheath or traction wire during the retraction of the stent delivery device. This objective is achieved through the following means:

[0005] This invention proposes a conveying device, the conveying device comprising:

[0006] A sheath assembly, the sheath assembly including a sheath and a traction wire connected to the distal end of the sheath;

[0007] A bending assembly includes a bending handle and a bending connector. The bending handle is sleeved on the outside of the sheath. The bending connector is located between the bending handle and the sheath and is connected to the proximal end of the traction wire. The bending connector is rotatably connected to the bending handle and can move relative to the sheath along the axial direction of the sheath. By rotating the bending handle, the bending connector can be driven to move along the axial direction of the sheath, thereby bending the distal end of the sheath.

[0008] A movable component is arranged back and forth along the axial direction of the sheath tube with the bending component. The movable component includes a movable handle and a movable joint. The movable handle is sleeved on the outside of the sheath tube, and the movable joint is located between the movable handle and the sheath tube. The movable joint is fixed relative to the sheath tube and rotatably connected to the movable handle. By rotating the movable handle, the movable joint can be driven to move the sheath tube along its own axial direction.

[0009] A clutch sleeve is disposed between the bending handle and the moving handle and is movable back and forth along the axial direction of the sheath. The clutch sleeve has a first state in which the bending handle is separated from the moving handle before movement and a second state in which the bending handle is engaged with the moving handle after movement.

[0010] In addition, the conveying device according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, in a first state, the clutch sleeve is fixed relative to the bending handle; in a second state, the clutch sleeve is fixed relative to both the bending handle and the moving handle.

[0012] In some embodiments of the present invention, the clutch sleeve is sleeved on the outside of the bending handle, and one of the outer wall surface of the bending handle and the inner wall surface of the clutch sleeve is provided with a first protrusion, and the other of the outer wall surface of the bending handle and the inner wall surface of the clutch sleeve is provided with a first sliding groove. The first protrusion is inserted into the first sliding groove in a manner that allows it to slide along the axial direction of the sheath. A positioning gap is provided between the distal inner wall surface of the moving handle and the outer wall surface of the bending handle. The proximal end of the clutch sleeve can be inserted into the positioning gap and can drive the moving handle to rotate together. Alternatively, a second protrusion may be provided on one of the distal outer wall surface of the moving handle and the proximal inner wall surface of the clutch sleeve, and a second sliding groove may be provided on one of the distal outer wall surface of the moving handle and the proximal inner wall surface of the clutch sleeve. The second protrusion may be inserted into the second sliding groove in a manner that allows it to slide along the axial direction of the sheath. In the first state, the first protrusion is inserted into the first sliding groove. In the second state, the first protrusion is inserted into the first sliding groove, and at the same time, the proximal end of the clutch sleeve is inserted into the positioning gap, or the second protrusion is inserted into the second sliding groove.

[0013] In some embodiments of the present invention, the proximal end of the clutch sleeve can be inserted into the positioning gap between the moving handle and the bending handle. One of the outer wall surface of the proximal end of the clutch sleeve and the inner wall surface of the distal end of the moving handle is provided with a third protrusion. One of the outer wall surface of the proximal end of the clutch sleeve and the inner wall surface of the distal end of the moving handle is provided with a third sliding groove. The third protrusion is inserted into the third sliding groove in a manner that allows it to slide along the axial direction of the sheath.

[0014] In some embodiments of the present invention, in a first state, the clutch sleeve is fixed relative to the moving handle; in a second state, the clutch sleeve is fixed relative to both the bending handle and the moving handle.

[0015] In some embodiments of the present invention, in the first state, the proximal end of the clutch sleeve is inserted between the bending handle and the moving handle and is fixed relative to the moving handle, or the proximal end of the clutch sleeve is sleeved on the outside of the moving handle and is fixed relative to the moving handle. In the second state, the distal end of the clutch sleeve is fixed relative to the bending handle, while the proximal end of the clutch sleeve is fixed relative to the moving handle.

[0016] In some embodiments of the present invention, the conveying device further includes a guide rod and an anti-rotation component. The guide rod is slidably sleeved on the outside of the sheath and is used to support the rotation of the bending handle and the moving handle. The anti-rotation component is detachably connected to the proximal end of the moving component. The anti-rotation component is provided with a first positioning rib, and the guide rod is provided with a first positioning groove for limiting the rotation of the first positioning rib. The first positioning rib is inserted into the first positioning groove.

[0017] In some embodiments of the present invention, the conveying device further includes a fixed handle and a locking sleeve. The fixed handle is sleeved on the outside of the sheath and is arranged back and forth with the bending sheath along the axial direction of the sheath. One end of the locking sleeve is rotatably connected to the distal end of the bending handle, and the other end of the locking sleeve is engaged with the fixed handle.

[0018] In some embodiments of the present invention, the bending adjustment joint is sleeved on the outside of the sheath tube and can move relative to the sheath tube along the axial direction of the sheath tube. The inner wall surface of the bending adjustment handle is provided with a first internal thread, and the bending adjustment joint is provided with a first external thread that is throttledly connected to the first internal thread. The bending adjustment joint is threadedly connected to the bending adjustment handle.

[0019] In some embodiments of the present invention, the inner wall surface of the movable handle is provided with a second internal thread, and the movable joint is provided with a second external thread that is pulsatingly connected to the second internal thread. The movable joint is threadedly connected to the movable handle and can drive the sheath to move along its own axial direction.

[0020] In some embodiments of the present invention, one of the inner wall surface of the moving handle and the outer wall surface of the bending handle is provided with a first rotating groove, and the other of the inner wall surface of the moving handle and the outer wall surface of the bending handle is provided with a first rotating bar. The first rotating bar is rotatably disposed in the first rotating groove and is used to position the moving handle in the axial direction.

[0021] According to the conveying device of the present invention, the clutch sleeve is placed in a first state in which the bending adjustment handle is separated from the moving handle. In the first state, the bending adjustment joint is driven to move along the axial direction of the sheath by rotating the bending adjustment handle, so as to bend the distal end of the sheath by the traction wire, thereby facilitating the distal end of the sheath to move the support to a designated position. Then, the clutch sleeve is placed in a second state in which the bending adjustment handle is engaged with the moving handle. In the second state, the sheath is driven to move along its own axial direction by rotating the moving handle, thereby facilitating accurate adjustment of the position of the distal end of the sheath and releasing the support. Since the moving handle and the bending adjustment handle are engaged in the second state and move together along the axial direction of the sheath, the relative position of the bending adjustment handle and the moving handle remains unchanged during the movement of the bending adjustment handle and the moving handle toward the proximal end and the release of the support. The bending adjustment joint moves toward the proximal end together with the sheath, and the relative position between the bending adjustment joint and the sheath remains unchanged. This prevents the distal end of the sheath from deforming due to bending deformation of the traction wire during the sheath retraction process, ensuring accurate positioning of the support. At the same time, it facilitates the retraction of the sheath, reduces the resistance during retraction, and ensures the safety and reliability of the retraction process. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0023] Figure 1 This is a partial structural schematic diagram of the conveying device in this embodiment;

[0024] Figure 2 for Figure 1 A partial cross-sectional structural diagram of the conveyor system;

[0025] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0026] Figure 4 for Figure 2 Schematic diagram of the connection structure between the moving joint and the sheath;

[0027] Figure 5 for Figure 2 Schematic diagram of the connection structure between the center adjustment handle and the locking sleeve;

[0028] Figure 6 for Figure 2 Schematic diagram of the connection structure between the center adjustment elbow joint and the sheath tube;

[0029] Figure 7 for Figure 6Schematic diagram of the structure of the center adjustment elbow joint;

[0030] Figure 8 for Figure 2 Schematic diagram of the connection structure between the fixed handle and the locking sleeve;

[0031] Figure 9 for Figure 2 A schematic diagram of the exploded structure of China Mobile's components;

[0032] Figure 10 for Figure 2 Schematic diagram of the connection structure between the center adjustment handle and the moving handle;

[0033] Figure 11 for Figure 2 Schematic diagram of the connection structure between the clutch sleeve and the snap-fit;

[0034] Figure 12 for Figure 11 A schematic diagram of the structure of the middle buckle;

[0035] Figure 13 for Figure 2 Schematic diagram of the connection structure between the central anti-rotation component and the guide rod.

[0036] The labels in the attached diagram are as follows:

[0037] 1: Conveying device;

[0038] 10: Sheath assembly; 11: Sheath; 12: Traction wire;

[0039] 20: Bending assembly; 21: Bending handle; 211: First bending handle part; 212: Second bending handle part; 213: First internal thread; 214: First snap-fit; 215: First slide groove; 216: First rotating groove; 217: First mounting groove; 218: Mounting protrusion; 22: Bending connector; 221: Axial part; 222: Radial part; 223: First external thread; 224: First mounting hole;

[0040] 30: Moving component; 31: Moving handle; 311: First moving handle part; 312: Second moving handle part; 313: Second internal thread; 314: First rotating bar; 32: Moving connector; 321: Second external thread; 33: First ferrule; 331: Third slide groove; 332: Second snap; 34: Second ferrule; 341: Third snap;

[0041] 40: Clutch sleeve; 41: First protrusion; 42: Third protrusion; 43: Sensor buckle;

[0042] 50: Guide rod; 51: Positioning groove;

[0043] 60: Fixed handle; 61: First fixed handle part; 62: Second fixed handle part; 63: Fourth slot;

[0044] 70: Locking sleeve; 71: Fourth buckle; 72: Bossed part;

[0045] 80: Anti-rotation component; 81: Positioning post; 82: Positioning rib;

[0046] 90: Cone tip. Detailed Implementation

[0047] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0048] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0049] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0050] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0051] To more clearly describe the structure of this application, the terms "proximal" and "distal" are used herein as conventional terms in the field of interventional medicine. Specifically, "distal" refers to the end furthest from the operator during the surgical procedure, "proximal" refers to the end closest to the operator during the surgical procedure, "axial" refers to its length direction, and "radial" refers to the direction perpendicular to the "axial".

[0052] Combination Figure 1 and Figure 2 As shown, the conveying device 1 of this embodiment includes a sheath assembly 10, a bending assembly 20, a moving assembly 30, and a clutch sleeve 40. The sheath assembly 10 includes a sheath 11 and a traction wire 12 connected to the distal end of the sheath 11. The sheath 11 has a conveying cavity for conveying the support. By pulling the traction wire 12, the distal end of the sheath 11 can be bent and deformed, thereby changing the position of the distal end of the sheath 11 and releasing the support.

[0053] Combination Figures 3 to 7As shown, the bending assembly 20 of this embodiment includes a bending handle 21 and a bending connector 22. The bending handle 21 is sleeved on the outside of the sheath 11, and the bending connector 22 is disposed between the bending handle 21 and the sheath 11 and connected to the proximal end of the traction wire 12. The distal end of the traction wire 12 is connected to the distal end of the sheath 11. The bending connector 22 is rotatably connected to the bending handle 21 and can move relative to the sheath 11 along the axial direction of the sheath 11. By rotating the bending handle 21, the bending connector 22 can be driven to move along the axial direction of the sheath 11, thereby bending the distal end of the sheath 11. The bending connector 22 has a first mounting hole 224 at its center. The diameter of the first mounting hole 224 is larger than the outer diameter of the sheath 11. The sheath 11 passes through the first mounting hole 224, thereby enabling the bending connector 22 to move relative to the sheath 11 along the axial direction of the sheath 11. Specifically, the inner wall of the bending handle 21 is provided with a first internal thread 213, and the outer wall of the bending connector 22 is provided with a first external thread 223 that is connected to the first internal thread 213. The bending connector 22 and the bending handle 21 are connected by the first internal thread 213 and the first external thread 223.

[0054] In this embodiment, a guide rod 50 is also sleeved on the outside of the sheath 11. An opening is provided at a partial location on the guide rod 50, through which a portion of the bending connector 22 passes and is threadedly connected to the bending handle 21. Specifically, the bending connector 22 in this embodiment includes an axial portion 221 and at least two radial portions 222. In this embodiment, there are two radial portions 222. A first mounting hole 224 is provided at the center of the axial portion 221, through which the sheath 11 passes. The two radial portions 222 are arranged around the outside of the axial portion 221 and spaced apart. A first external thread 223 is provided on the outer circumferential surface of the radial portions 222. The radial portions 222 pass through the opening on the guide rod 50 and are threadedly connected to the first internal thread 213 on the bending handle 21. Due to the setting of the guide rod 50, the rotation of the bending joint 22 in the circumferential direction is restricted. When the bending handle 21 is rotated externally, the bending joint 22 moves along the axial direction of the sheath tube 11 through the threaded transmission, thereby pulling the traction wire 12 and bending the distal end of the sheath tube 11.

[0055] Furthermore, combined with Figure 3 and Figure 5As shown, the bending handle of this embodiment includes a first bending handle portion 211 and a second bending handle portion 212 arranged opposite to each other. Optionally, the first bending handle portion 211 and the second bending handle portion 212 are symmetrically arranged along the plane containing the axis of the bending handle 21. The inner wall surfaces of the first bending handle portion 211 and the second bending handle portion 212 cooperate to form a first internal thread 213. By providing the first bending handle portion 211 and the second bending handle portion 212, it is convenient to disassemble and assemble the bending handle 21, and then to fit the bending handle 21 onto the outside of the sheath tube 10. In this embodiment, the first bending handle portion 211 is provided with a first buckle 214, and the second bending handle portion 212 is provided with a first slot corresponding to the first buckle. The first buckle 214 is inserted into the first slot (not shown in the figure), thereby realizing the connection and fixation of the first bending handle portion 211 and the second bending handle portion 212.

[0056] Combined Figure 3 , Figure 5 and Figure 8 As shown, the conveying device 1 of this embodiment further includes a fixed handle 60 and a locking sleeve 70. The fixed handle 60 is sleeved on the outside of the sheath tube 11 and is arranged back and forth with the bending handle 21 along the axial direction of the sheath tube 11. One end of the locking sleeve 70 is rotatably connected to the distal end of the bending handle 21, and the other end of the locking sleeve 70 is engaged with the fixed handle 60. Specifically, the fixed handle 60 of this embodiment includes a first fixed handle part 61 and a second fixed handle part 62. The first fixed handle part 61 and the second fixed handle part 62 are symmetrically arranged along the plane containing the axis of the fixed handle 61. The distal ends are engaged by a snap-fit, and the proximal ends are fixedly connected by the locking sleeve 70. The inner wall surface of the locking sleeve 70 facing the end of the fixed handle 60 is provided with two symmetrically arranged fourth buckles 71. The outer wall surface of the proximal ends of the first fixed handle part 61 and the second fixed handle part 62 are respectively provided with two fourth slots 63. The fourth buckles 71 are engaged in the fourth slots 63, thereby realizing the positioning of the proximal end of the fixed handle 60. Meanwhile, the end of the locking sleeve 70 facing the bending handle 21 is provided with a boss 72, and an annular mounting groove is formed between the boss 72 and the locking sleeve 70. The distal ends of the first bending handle part 211 and the second bending handle part 212 are respectively provided with semi-annular mounting protrusions 218. The two mounting protrusions 218 surround the ring-shaped mounting protrusion and are inserted into the annular mounting groove together, so that the distal end of the bending handle 21 is rotatably connected to the locking sleeve 70.

[0057] Combination Figure 3 and 9As shown, the moving component 30 of this embodiment includes a moving handle 31 and a moving connector 32. The moving handle 31 is sleeved on the outside of the sheath 11, and the moving connector 32 is disposed between the moving handle 31 and the sheath 11. The moving connector 32 is fixed relative to the sheath 11 and rotatably connected to the moving handle 31. By rotating the moving handle 31, the moving connector 32 can be driven to move the sheath 11 along its own axial direction.

[0058] Specifically, the movable handle 31 in this embodiment includes a first movable handle portion 311 and a second movable handle portion 312. The first movable handle portion 311 and the second movable handle portion 312 are symmetrically arranged along the plane containing the axis of the movable handle 31. The inner wall surfaces of the first movable handle portion 311 and the second movable handle portion 312 near their proximal ends jointly form a second internal thread 313. The outer wall surface of the movable joint 32 is provided with a second external thread 321, thereby enabling the movable joint 32 and the movable handle 31 to be threadedly connected through the engagement of the second internal thread 313 and the second external thread 321. The movable joint 32 is sleeved on the outside of the sheath tube 11 and fixed to the sheath tube 11, thereby driving the sheath tube 11 to move axially while the movable joint 32 and the movable handle 31 are threadedly driven, thus adjusting the distal position of the sheath tube 11.

[0059] Furthermore, the movable handle 31 of this embodiment also includes a first retaining sleeve 33 and a second retaining sleeve 34. The first retaining sleeve 33 is located at the distal end of the movable handle 31, and the second retaining sleeve 34 is located at the proximal end of the movable handle 31. (Combined with...) Figure 9 , Figure 12 and Figure 13 As shown, the inner wall surface of the first sleeve 33 facing the end of the moving handle 31 is provided with a second buckle 332, and the outer wall surface of the moving handle 31 facing the end of the first sleeve 33 is provided with a second groove (not shown in the figure). The second buckle 332 is engaged in the second groove, thereby fixing the distal ends of the first moving handle portion 311 and the second moving handle portion 312 through the first sleeve 33. The inner wall surface of the second sleeve 34 facing the end of the moving handle 31 is provided with a third buckle 341, and the outer wall surface of the moving handle 31 facing the end of the second sleeve 34 is provided with a third groove (not shown in the figure). The third buckle 341 is engaged in the third groove, thereby fixing the proximal ends of the first moving handle portion 311 and the second moving handle portion 312 through the second sleeve 34, thereby allowing the moving handle 31 to be fitted onto the outside of the sheath tube 10.

[0060] Furthermore, in this embodiment, the distal end of the movable handle 31 is sleeved outside the proximal end of the bending handle 21, fixing the proximal ends of the first bending handle portion 211 and the second bending handle portion 212, and is throttle-connected to the bending handle 21. Specifically, as shown... Figure 10As shown, the outer wall of the bending handle 21 in this embodiment is provided with a first rotating groove 216, and the inner wall of the moving handle 31 is provided with a first rotating strip 314. Specifically, in this embodiment, the first rotating strip 314 is an annular strip, and the first rotating strip 314 is rotatably disposed in the first rotating groove 216, and is used to position the moving handle 31 in the axial direction. When the connection between the locking sleeve 70 and the fixed handle 60 is released, since the first rotating strip 314 of the moving handle 31 is inserted into the first rotating groove 216 of the bending handle 21, the moving handle 31 and the bending handle 21 can be driven to move together in the axial direction at the same time, so as to achieve the purpose of quickly withdrawing the sheath tube 10.

[0061] Combined Figure 3 , Figure 5 , Figure 11 and Figure 12 As shown, the clutch sleeve 40 of this embodiment is disposed between the bending handle 21 and the moving handle 31 and can move back and forth along the axial direction of the sheath tube 10. The clutch sleeve 40 has a first state in which the bending handle 21 is separated from the moving handle 31 before movement and a second state in which the bending handle 21 is engaged with the moving handle 31 after movement.

[0062] Specifically, in this embodiment, the clutch sleeve 40 is sleeved on the outside of the bending handle 21. The inner wall surface of the clutch sleeve 40 is provided with a first protrusion 41, and the outer wall surface of the bending handle 21 is provided with a first sliding groove 215. The first protrusion 41 is inserted into the first sliding groove 215 in a manner that allows it to slide along the axial direction of the sheath tube 11, thereby realizing the movement of the clutch sleeve 40 along the axial direction of the sheath tube 11. At the same time, the clutch sleeve 40 fixes the distal ends of the first bending handle portion 211 and the second bending handle portion 212.

[0063] In this embodiment, a positioning gap is provided between the inner wall of the distal end of the moving handle 31 and the outer wall of the bending handle 21. The proximal end of the clutch sleeve 40 can be inserted into the positioning gap and can drive the moving handle 31 and the bending handle 21 to rotate together. When the clutch sleeve 40 is not inserted into the positioning gap, the bending handle 21 is separated from the moving handle 31, and the clutch sleeve 40 is in the first state. The bending handle 21 and the moving handle 31 can rotate relative to each other. By rotating the clutch sleeve 40, only the bending handle 21 can be driven to rotate. In the first state, by rotating the bending handle 21, the bending connector 22 is driven to move along the axial direction of the sheath tube 10, so as to drive the distal end of the sheath tube 11 to bend through the traction wire 12, thereby facilitating the distal end of the sheath tube 11 to drive the support to move to the designated position. When the proximal end of the clutch sleeve 40 is inserted into the positioning gap, the clutch sleeve 40 is in the second state, and the moving handle 31 and the bending handle 21 are relatively fixed, so they can rotate together. In the second state, rotating the moving handle 31 drives the sheath 11 to move along its own axial direction, thereby facilitating accurate adjustment of the distal end position of the sheath 11 and releasing the bracket. Since the clutch sleeve 40 is in the second state, the moving handle 31 and the bending handle 21 are engaged and move together along the axial direction of the sheath 11. During the process of the bending handle 21 and the moving handle 31 moving towards the proximal end and releasing the bracket, the relative position of the bending handle 21 and the moving handle 31 remains unchanged. The bending joint 22 moves towards the proximal end along with the sheath 11, and the relative axial position between the bending joint 22 and the sheath 11 remains unchanged. This prevents the distal end of the sheath 11 from deforming due to the bending deformation of the traction wire 12 during the retraction process, ensuring accurate positioning of the bracket. At the same time, it facilitates the retraction of the sheath 11, reduces the resistance during retraction, and ensures the safety and reliability of the retraction process.

[0064] In other embodiments of this application, when the clutch sleeve 40 is in the second state, a portion of the clutch sleeve 40 can be fitted onto the outside of the moving handle 31, and a second protrusion is provided on one of the distal outer wall surface of the moving handle 31 and the proximal inner wall surface of the clutch sleeve 40. A second groove is provided on one of the distal outer wall surface of the moving handle 31 and the proximal inner wall surface of the clutch sleeve 40, and the second protrusion is inserted into the second groove in a manner that allows it to slide along the axial direction of the sheath 11. In the first state, the first protrusion 41 is inserted into the first groove 215, thereby driving the bending handle 21 to rotate independently through the clutch sleeve 40. In the second state, the first protrusion 41 is inserted into the first groove 215, and the second protrusion is inserted into the second groove, thereby driving the moving handle 31 and the bending handle 21 to rotate together through the clutch sleeve 40.

[0065] Specifically, in combination Figure 11 and Figure 12As shown, in this embodiment, the proximal end of the clutch sleeve 40 can be inserted into the positioning gap between the moving handle 31 and the bending handle 21. The outer wall surface of the proximal end of the clutch sleeve 40 is provided with a third protrusion 42, and the inner wall surface of the distal end of the moving handle 31 is provided with a third sliding groove 331. The third protrusion 42 is inserted into the third sliding groove 331 in a manner that allows it to slide along the axial direction of the sheath tube 11, thereby fixing the clutch sleeve 40 and the moving handle 31. The clutch sleeve 40 drives the moving handle 31 and the bending handle 21 to rotate together.

[0066] In other embodiments of this application, in a first state, the clutch sleeve 40 is fixed relative to the moving handle 31; in a second state, the clutch sleeve 40 is fixed relative to both the bending handle 21 and the moving handle 31. Specifically, in one embodiment, in the first state, the proximal end of the clutch sleeve 40 is inserted between the bending handle 21 and the moving handle 31 and is fixed relative to the moving handle 31, or the proximal end of the clutch sleeve 40 is sleeved on the outside of the moving handle 31 and is fixed relative to the moving handle 31. In the second state, the distal end of the clutch sleeve 40 is fixed relative to the bending handle 21, while the proximal end of the clutch sleeve 40 is fixed relative to the moving handle 31. The specific connection method can be similar to the fixing method of the clutch sleeve 40 in this embodiment. A positioning protrusion is provided on the clutch sleeve 40, and a positioning groove that cooperates with the positioning protrusion is provided on the moving handle 31 and the bending handle 21. Thus, by moving the clutch sleeve 40 axially, the positioning protrusion and the positioning groove are connected, thereby putting the clutch sleeve 40 in the first state or the second state.

[0067] Combined Figure 3 , Figure 5 and Figure 11 As shown, the distal outer wall of the bending handle 21 in this embodiment is also provided with a first mounting groove 217, and the distal inner wall of the clutch sleeve 40 is provided with a sensor buckle 43. When the clutch sleeve 40 is in the first state, the sensor buckle 43 is inserted into the first mounting groove 217, thereby fixing the clutch sleeve 40 to a fixed axial position outside the bending handle 21. When the clutch sleeve 40 is driven to move axially toward the moving handle 31, the sensor buckle 43 disengages from the first mounting groove 217 and emits a sound or tactile sensation, reminding the operator to continue driving the clutch sleeve 40 axially.

[0068] Furthermore, combined Figure 2 and Figure 13As shown, the conveying device 1 of this embodiment also includes an anti-rotation component 80. The guide rod 50 is slidably sleeved on the outside of the sheath tube 10 and is used to support the rotation of the bending handle 32 and the moving handle 31. The anti-rotation component 80 is detachably connected to the proximal end of the moving handle 31. The anti-rotation component 80 is provided with a positioning rib 82. The guide rod 50 is provided with a positioning groove 51 for limiting the rotation of the positioning rib 82. The positioning rib 82 is inserted into the positioning groove 51 to prevent the anti-rotation component 80 from rotating.

[0069] Specifically, in this embodiment, the end face of the second sleeve 34 located near the moving handle 31 is provided with a mounting hole, and the end face of the anti-rotation member 80 facing the moving handle 31 is provided with a positioning post 81. By inserting the positioning post 81 into the mounting hole, the anti-rotation member 80 is fixed to the end face of the second sleeve 34, and at the same time, the positioning rib 82 is inserted into the positioning groove 51 to prevent the moving handle 31 from rotating. When it is necessary to rotate the moving handle 31, the connection between the anti-rotation member 80 and the second sleeve 34 is removed, thereby driving the moving handle 31 and the bending handle 21 to rotate together through the clutch sleeve 40.

[0070] Furthermore, such as Figure 1 As shown, the distal end of the sheath 11 in this embodiment is also connected to a cone 90, which is used to guide the movement of the sheath 11 in the blood vessel. The cone 90 or the distal end of the sheath 11 may also be provided with a contrast agent to observe the specific movement position of the distal end of the sheath 11 in the blood vessel.

[0071] When using the delivery device 1 of this application to deliver the stent, firstly, the blood vessel of the subject to be treated is punctured, a guidewire is inserted, and then the stent and sheath 11 are inserted into the blood vessel along the guidewire. Under X-ray fluoroscopic monitoring, the clutch sleeve 40 in the first state is rotated. Under the rotation of the clutch sleeve 40, the bending handle 21 and the bending connector 22 drive the traction wire 12 to move, thereby bending the distal end of the sheath 11. By adjusting the number of rotations of the clutch sleeve 40, the distal end of the sheath 11 is bent to a suitable angle. Then, the distal end of the sheath 11 is moved to the position of the diseased blood vessel. If it is necessary for the sheath 11 to be in a straight state, the clutch sleeve 40 is rotated in the opposite direction, and then the clutch is engaged. The clutch sleeve 40 moves toward the proximal end of the sheath tube and locks into the first clamping sleeve 33. If the sheath tube 11 needs to remain bent, the clutch sleeve 40 is moved backward and locked into the first clamping sleeve 33. The connection between the anti-rotation component 80 and the second clamping sleeve 34 is removed. The moving handle 31 is rotated to slowly retract the sheath tube 11. During this process, the bending handle 21 and the bending connector 22 retract together with the moving handle 31. The bending connector 22 and the sheath tube 11 are kept in an axially fixed position. After the head of the bracket is opened, the connection between the locking sleeve 70 and the fixed handle 60 is released. The moving handle 31 and the bending handle 21 are retracted together to fully open the bracket.

[0072] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A delivery device characterized by, The application relates to a sheath bending device, which comprises the following components: a sheath assembly, which comprises a sheath and a traction wire connected to the distal end of the sheath; a bending assembly, which comprises a bending handle and a bending joint, the bending handle is sleeved outside the sheath, the bending joint is arranged between the bending handle and the sheath and is connected to the proximal end of the traction wire, the bending joint is rotationally connected with the bending handle and can move along the axial direction of the sheath, the bending handle can drive the bending joint to move along the axial direction of the sheath to bend the distal end of the sheath by rotating the bending handle; a moving assembly, which is arranged in front of and behind the bending assembly along the axial direction of the sheath, the moving assembly comprises a moving handle and a moving joint, the moving handle is sleeved outside the sheath, the moving joint is arranged between the moving handle and the sheath, the moving joint is rotationally connected with the moving handle and is relatively fixed with the sheath, the moving handle can drive the moving joint to move along the axial direction of the sheath by rotating the moving handle; a clutch sleeve, which is arranged between the bending handle and the moving handle and can move along the axial direction of the sheath, the clutch sleeve has a first state in which the bending handle is separated from the moving handle when the clutch sleeve moves forward and a second state in which the bending handle is connected with the moving handle when the clutch sleeve moves backward.

2. The delivery device of claim 1, wherein, In the first state, the clutch sleeve is relatively fixed with the bending handle; in the second state, the clutch sleeve is relatively fixed with the bending handle and the moving handle.

3. The delivery device of claim 2, wherein, The clutch sleeve is sleeved outside the bending handle, one of the outer wall surface of the bending handle and the inner wall surface of the clutch sleeve is provided with a first protrusion, the other of the outer wall surface of the bending handle and the inner wall surface of the clutch sleeve is provided with a first sliding groove, the first protrusion is inserted into the first sliding groove in a sliding mode along the axial direction of the sheath, the distal end of the moving handle is provided with a positioning gap between the outer wall surface of the bending handle, the proximal end of the clutch sleeve can be inserted into the positioning gap and can drive the moving handle to rotate together; or one of the distal end of the moving handle and the proximal end of the clutch sleeve is provided with a second protrusion, the other of the distal end of the moving handle and the proximal end of the clutch sleeve is provided with a second sliding groove, the second protrusion is inserted into the second sliding groove in a sliding mode along the axial direction of the sheath, in the first state, the first protrusion is inserted into the first sliding groove, in the second state, the first protrusion is inserted into the first sliding groove, meanwhile, the proximal end of the clutch sleeve is inserted into the positioning gap or the second protrusion is inserted into the second sliding groove.

4. The delivery device of claim 3, wherein, The proximal end of the clutch sleeve is inserted into the positioning gap between the moving handle and the bending handle, one of the outer wall surface of the proximal end of the clutch sleeve and the inner wall surface of the distal end of the moving handle is provided with a third protrusion, and one of the outer wall surface of the proximal end of the clutch sleeve and the inner wall surface of the distal end of the moving handle is provided with a third sliding groove, the third protrusion is inserted into the third sliding groove in a slidable manner along the axial direction of the sheath tube.

5. The delivery device of claim 2, wherein, In the first state, the clutch sleeve is relatively fixed with the moving handle, and in the second state, the clutch sleeve is relatively fixed with both the bending handle and the moving handle.

6. The delivery device of claim 5, wherein, In the first state, the proximal end of the clutch sleeve is inserted between the bending handle and the moving handle and is relatively fixed with the moving handle, or the proximal end of the clutch sleeve is sleeved outside the moving handle and is relatively fixed with the moving handle, and in the second state, the distal end of the clutch sleeve is relatively fixed with the bending handle, and the proximal end of the clutch sleeve is relatively fixed with the moving handle.

7. The delivery device of any one of claims 1 to 6, wherein, The delivery device further comprises a guide rod and an anti-rotation member, the guide rod is sleeved outside the sheath tube in a slidable manner and is used for supporting the rotation of the bending handle and the moving handle, the anti-rotation member is detachably connected with the proximal end of the moving assembly, the anti-rotation member is provided with a first positioning rib, the guide rod is provided with a first positioning groove for limiting the rotation of the first positioning rib, and the first positioning rib is inserted into the first positioning groove.

8. The delivery device of any one of claims 1 to 6, wherein, The delivery device further comprises a fixed handle and a lock sleeve, the fixed handle is sleeved outside the sheath tube and is arranged forward and backward along the axial direction of the sheath tube with the bending sheath tube, one end of the lock sleeve is rotatably connected with the distal end of the bending handle, and the other end of the lock sleeve is clamped on the fixed handle.

9. The delivery device of any of claims 1-6, wherein, The bending joint is sleeved outside the sheath tube and can move along the axial direction of the sheath tube relative to the sheath tube, the inner wall surface of the bending handle is provided with a first internal thread, the bending joint is provided with a first external thread in transmission connection with the first internal thread, and the bending joint is in threaded connection with the bending handle.

10. The delivery device of any of claims 1-6, wherein, The inner wall surface of the moving handle is provided with a second internal thread, the moving joint is provided with a second external thread in transmission connection with the second internal thread, and the moving joint is in threaded connection with the moving handle and can drive the sheath tube to move along the axial direction of the sheath tube.

11. The delivery device of any of claims 1-6, wherein, One of the inner wall surface of the moving handle and the outer wall surface of the bending handle is provided with a first rotation groove, the other of the inner wall surface of the moving handle and the outer wall surface of the bending handle is provided with a first rotation strip, the first rotation strip is rotatably arranged in the first rotation groove and is used for positioning the axial direction of the moving handle.

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