Delivery assembly and medical instrument

Abstract

The conveying assembly comprises a handle assembly, the handle assembly comprises a shell assembly and a release assembly, the release assembly comprises a tooth block and a driving assembly, the tooth block is arranged in an inner cavity of the shell assembly, the shell assembly limits circumferential rotation of the tooth block, a first thread is arranged on the side circumference of the tooth block, and the driving assembly is arranged in the inner cavity of the shell assembly. The first thread continuously extends by at least one circle in the circumferential direction, the driving assembly is rotationally connected to the shell assembly in the circumferential direction, and the driving assembly is provided with a second thread matched with the first thread. The cooperation of the first thread and the second thread is used for converting circumferential rotation of the driving assembly relative to the shell assembly into axial sliding of the tooth block relative to the shell assembly. The medical device comprises a conveying assembly and an intravascular stent. The device has the advantages of being smooth in operation and free of blocking.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a conveying component and a medical device. Background Art

[0002] In stent intervention surgery, the stent is usually delivered through a delivery system to the lesion in the blood vessel. During the delivery process, the stent is compressed in the sheath, and the sheath is withdrawn relative to the handle to release the stent in the sheath into the blood vessel. The withdrawal of the sheath is achieved by operating the knob on the handle. A conversion structure connecting the knob and the sheath is set in the handle to convert the rotation of the knob into the withdrawal of the sheath.

[0003] The handle is usually designed with two half shells covering each other in the radial direction. Due to processing errors or installation errors, steps will inevitably appear at the contact position of the two half shells due to misalignment, which will affect the movement of the conversion structure and cause the conversion structure to get stuck at the step.

[0004] Therefore, how to make the handle of the conveying system smoother and without jamming during operation is a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] Based on this, it is necessary to provide a delivery component and a medical device to address the above technical problems.

[0006] A delivery assembly includes a handle assembly, wherein the handle assembly includes a housing assembly and a release assembly, wherein the housing assembly has an inner cavity, and the release assembly includes:

[0007] A tooth block, the tooth block is arranged in the inner cavity of the housing component, the housing component limits the circumferential rotation of the tooth block, the side circumference of the tooth block is provided with a first thread, the first thread extends continuously in the circumferential direction for at least one circle, and

[0008] A drive assembly is rotatably connected to the housing assembly in the circumferential direction, and the drive assembly has a second thread that cooperates with the first thread. The cooperation between the first thread and the second thread is used to convert the circumferential rotation of the drive assembly relative to the housing assembly into axial sliding of the tooth block relative to the housing assembly.

[0009] In one embodiment, the tooth block includes a transmission part, a connecting part and a supporting part, the transmission part is an annular structure with an internal space, the connecting part and the supporting part are located in the internal space, the supporting part connects the transmission part and the connecting part, and the first thread is arranged on the outer periphery of the transmission part.

[0010] In one embodiment, the delivery assembly is used to deliver a vascular stent, and the delivery assembly includes an outer sheath core assembly, and the outer sheath core assembly is used to control whether the distal end of the vascular stent is released. The outer sheath core assembly is connected to the tooth block and, driven by the tooth block, moves axially along the handle assembly to achieve the release of the vascular stent.

[0011] In one embodiment, the connecting portion and / or the supporting portion and / or the transmission portion enclose a guide cavity;

[0012] The housing component comprises a guide shell, the guide shell is inserted into the guide cavity, and the guide shell and the guide cavity are slidably matched, so that the tooth block can move along the axial direction of the housing component but cannot rotate around the circumference of the housing component.

[0013] In one embodiment, there are at least two guide cavities, and the number of the guide shells corresponds to the number of the guide cavities.

[0014] In one embodiment, the release assembly comprises at least two locking members, wherein the locking members are threadedly connected to the outer sheath core assembly, and the tooth block is locked between the two locking members.

[0015] In one embodiment, the conveying assembly includes an outer sheath tube, and a bending adjustment wire is provided on the side wall of the outer sheath tube. One end of the bending adjustment wire is connected to the outer sheath tube, and the other end is connected to the tooth block. The bending adjustment wire moves axially along the handle assembly under the drive of the tooth block to achieve bending of the outer sheath tube.

[0016] In one embodiment, the driving assembly is an annular structure, and the second thread is located on the inner surface of the annular structure of the driving housing.

[0017] In one embodiment, the drive assembly includes a first drive shell and a second drive shell, and the first drive shell and the second drive shell can be matched to form the annular structure.

[0018] In one embodiment, a side wall of the drive assembly is provided with an observation window for displaying the axial position of the tooth block in the drive assembly.

[0019] In one embodiment, the conveying assembly includes an outer sheath-core assembly, the outer sheath-core assembly includes an outer core and a claw, and two ends of the outer core are respectively connected to the claw and the tooth block;

[0020] The delivery assembly is used to deliver the vascular stent, and the state in which the distal end of the vascular stent is compressed in the radial direction is called a compressed state, and the state in which the distal end of the vascular stent is expanded in the radial direction relative to the compressed state is called an expanded state;

[0021] The clamping claw is used to hook the vascular stent to keep the vascular stent in the compressed state. The outer core can also move axially relative to the vascular stent to release the state of hooking the vascular stent, so that the vascular stent can be transformed from the compressed state to the expanded state.

[0022] In one embodiment, the conveying component includes an inner sheath core component that can slide axially relative to the outer sheath core component, and the inner sheath core component includes an end and an inner core connected to the end, and the claws and the end can be in a conflicting state and a separated state, forming a closed-loop space for hooking the vascular stent in the conflicting state.

[0023] In one embodiment, the outer core is a tubular structure having a lumen, and the inner core is slidably disposed in the lumen of the outer core.

[0024] In one embodiment, the delivery component includes an outer sheath tube having a lumen, and the outer sheath core component is slidably disposed in the lumen of the outer sheath tube. The outer sheath tube is used to accommodate the vascular stent compressed in the radial direction.

[0025] In one embodiment, the conveying assembly includes a support rod fixedly connected to the outer core, the support rod is inserted into the lumen of the outer sheath, the diameter of the support rod is larger than the diameter of the outer core, and a mounting position for mounting the vascular stent is formed between the distal end of the support rod and the claw, and when the vascular stent is compressed in the outer sheath, the distal end of the support rod is used to abut the end of the vascular stent.

[0026] A medical device comprises a delivery component and a vascular stent delivered by the delivery component.

[0027] Beneficial effect: The tooth block in the conveying assembly provided by the present application realizes the conversion of the circumferential rotation of the outer shell assembly into axial sliding of the tooth block relative to the outer shell by cooperating with the second thread on the driving assembly through the first thread extending continuously in the circumferential direction; that is, the first thread extending continuously in the circumferential direction is not disconnected in the circumferential direction, so that no steps or concave-convex parts are generated in the radial direction at the disconnection point due to the disconnection, thereby making the cooperation between the first thread and the second thread smoother, that is, the handle assembly in the conveying assembly is smoother and free of jamming during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the exploded structure of a conveying assembly in one embodiment of the present application;

[0029] Figure 2 is a cross-sectional view of a conveying assembly in one embodiment of the present application;

[0030] Figure 3 It is a structural schematic diagram of a tooth block in one embodiment of the present application;

[0031] Figures 4 to 6 They are schematic diagrams of the structures of the conveying components in some embodiments of the present application;

[0032] Figure 7 This is a schematic structural diagram of a delivery assembly with an adjustable outer sheath tube in one embodiment of the present application;

[0033] Figure 8 and Fig. 9 Schematic diagram of the structure of two different forms of the outer sheath tube assembly in one embodiment of the present application.

[0034] Reference numerals:

[0035] 10. Conveying assembly; 100. Handle assembly; 110. Shell assembly; 111. Guide shell; 120. Release assembly; 121. Tooth block; 1211. Transmission part; 12111. First thread; 1212. Connecting part; 1213. Support part; 1214. Guide cavity; 122. Drive assembly; 1221. Second thread; 1222. First drive shell; 1223. Second drive shell; 1224. Observation window; 123. Locking piece; 201. Outer sheath; 2011. Channel; 20111. Opening; 202. Outer sheath core assembly; 2021. Outer core; 2022. Claw; 203. Inner sheath core assembly; 2031. End; 20311. Step structure; 2032. Inner core; 204. Support rod; 2041. Mounting position; 300. Adjustment wire; 20. Vascular stent. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention is described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] The term "distal end" used herein refers to the end of a component that is far away from the operator in its length direction when the component is being operated by the operator, and the term "proximal end" refers to the end of the component that is close to the operator in its length direction. When a component is not being operated by the operator, "distal end" and "proximal end" can be understood as playing a role in distinguishing different parts of the component. That is, "distal end" and "proximal end" are only for the purpose of explanation, so that readers can more easily understand the description of a component, and they are not used as a limitation on the structure of the component.

[0039] Figure 1 FIG. 1 is a schematic diagram of an exploded structure of a conveying assembly 10 in one embodiment of the present application. Figure 2 FIG. 1 is a cross-sectional view of a delivery assembly 10 in one embodiment of the present application. The delivery assembly 10 is used in a vascular interventional procedure to deliver a vascular stent 20 (see FIG. 1 ). Figure 5 ) is delivered to the target position in the blood vessel, and then the delivery component 10 is withdrawn from the blood vessel, leaving the vascular stent 20 in the blood vessel.

[0040] The delivery assembly 10 includes a handle assembly 100. The doctor operates the delivery assembly 10 by holding the handle assembly 100, that is, the handle assembly 100 is the doctor's direct operation object. The handle assembly 100 includes a housing assembly 110 and a release assembly 120. The release assembly 120 is installed on the housing assembly 110. The doctor can hold the housing assembly 110 and then operate the release assembly 120 with his fingers to control the vascular stent 20 installed in the delivery assembly 10.

[0041] like Figure 1 As shown, the housing assembly 110 is a shell structure, which has an inner cavity, and some parts are arranged in the inner cavity. Specifically, the release assembly 120 includes a tooth block 121 and a drive assembly 122, and the tooth block 121 is arranged in the inner cavity of the housing assembly 110. The housing assembly 110 is a slender structure, and the inner cavity formed by it is also a slender structure. The axial direction of the slender structure is its length direction. The cooperation between the housing assembly 110 and the tooth block 121 allows the housing assembly 110 to limit the axial rotation of the tooth block 121, but the tooth block 121 can slide axially in the slender inner cavity.

[0042] In one embodiment, if Figure 2 As shown, the side circumference of the tooth block 121 is provided with a first thread 12111, and the first thread 12111 extends at least one circle in the circumferential direction. The driving assembly 122 has a second thread 1221 that cooperates with the first thread 12111, that is, the first thread 12111 is connected to the second thread 1221 by a threaded connection. The cooperation of the first thread 12111 and the second thread 1221 is used to convert the circumferential rotation of the driving assembly 122 relative to the housing assembly 110 into the axial sliding of the tooth block 121 relative to the housing assembly 110.

[0043] Specifically, the drive assembly 122 is rotated circumferentially relative to the housing assembly 110, and the tooth block 121 having the second thread 1221 can be moved through the cooperation of the first thread 12111 and the second thread 1221. Since the rotation of the tooth block 121 around the axial direction or along the circumferential direction is limited by the housing assembly 110, the tooth block 121 can only slide axially in the elongated inner cavity of the housing assembly 110, so the relative movement of the first thread 12111 and the second thread 1221 causes the tooth block 121 to slide axially relative to the housing assembly 110, thereby controlling whether the vascular stent 20 is released.

[0044] The tooth block 121 in the conveying assembly 10 provided in the above embodiment converts the circumferential rotation of the housing assembly 110 into axial sliding of the tooth block 121 relative to the housing by cooperating with the second thread 1221 on the driving assembly 122 through the first thread 12111 extending continuously in the circumferential direction; that is, the first thread 12111 extending continuously in the circumferential direction is not disconnected in the circumferential direction, so that no steps or concave-convex portions are generated in the radial direction at the disconnection point due to the disconnection, thereby making the cooperation between the first thread 12111 and the second thread 1221 smoother, that is, the handle assembly 100 in the conveying assembly 10 is smoother and free of jamming during operation.

[0045] Figure 3 The tooth block 121 in one embodiment of the present application is a schematic diagram of the structure, the tooth block 121 includes a transmission part 1211, a connection part 1212 and a support part 1213, the support part 1213 connects the transmission part 1211 and the connection part 1212, the first thread 12111 is arranged on the outer periphery of the transmission part 1211, and the connection part 1212 is used to control whether the vascular stent 20 is released. In other words, the second thread 1221 drives the transmission part 1211 to move through the first thread 12111, and the transmission part 1211 drives the connection part 1212 to move through the support part 1213.

[0046] In one embodiment, the transmission part 1211 is an annular structure having an internal space, and the annular structure is, for example, a circular ring, and the circular ring structure encloses a cylindrical internal space, and the connecting part 1212 and the supporting part 1213 are located in the internal space. For example, the connecting part 1212 can be located in the middle of the cylindrical internal space, and the supporting part 1213 extends radially, and the two ends of the supporting part 1213 connect the transmission part 1211 and the connecting part 1212.

[0047] Figure 4The schematic diagram of the structure of the delivery assembly 10 in one embodiment of the present application, the delivery assembly 10 is used to deliver the vascular stent 20, and the delivery assembly 10 includes not only the handle assembly 100 in the above embodiment, but also an outer sheath core assembly 202. The outer sheath core assembly 202 is used to control whether the distal end of the vascular stent 20 is released. As described in the above embodiment, the tooth block 121 can convert the rotational motion of the drive assembly 122 into the axial movement of the tooth block 121 along the outer shell assembly 110 when the drive assembly 122 is rotated, and in this embodiment, the outer sheath core assembly 202 is connected to the tooth block 121, so the outer sheath core assembly 202 can move with the tooth block 121 relative to the outer shell assembly 110, and the outer sheath core assembly 202 moves axially along the handle assembly 100 under the drive of the tooth block 121 to realize the release of the vascular stent 20.

[0048] In one embodiment, if Figure 4 As shown, the outer sheath core assembly 202 includes an outer core 2021 and a claw 2022, and the two ends of the outer core 2021 are respectively connected to the claw 2022 and the tooth block 121, and when the tooth block 121 moves along the axial direction of the handle assembly 100, the claw 2022 can be driven to move in the axial direction through the outer core 2021. The vascular stent 20 can be a tubular structure, which is sleeved on the outer periphery of the outer core 2021, and the distal end of the vascular stent 20 roughly corresponds to the position of the claw 2022, so that the claw 2022 can grasp or hook the distal end of the vascular stent 20.

[0049] Specifically, the vascular stent 20 is an elastic structure that can be compressed or expanded in the radial direction. The state in which the distal end of the vascular stent 20 is compressed in the radial direction is called a compressed state, and the state in which the vascular stent 20 is expanded in the radial direction relative to the compressed state is called an expanded state. The state in which the vascular stent 20 is not subjected to external compressive force is called an expanded state. When the vascular stent 20 is subjected to a compressive force in the radial direction, the vascular stent 20 is compressed in the radial direction, that is, it is compressed from the expanded state to the compressed state. When the above-mentioned compressive force in the radial direction is cancelled, the vascular stent 20 can be restored from the compressed state to the expanded state under its own elasticity.

[0050] The distal end of the stent 20 is caught or hooked by the claw 2022 in the compressed state, that is, the effective working size of the claw 2022 is smaller than the diameter of the stent 20 in the expanded state. The outer core 2021 can move axially relative to the stent 20, thereby driving the claw 2022 to move axially relative to the stent 20, so that the claw 2022 can release the state of hooking the stent 20, so that the stent 20 can be transformed from the compressed state to the expanded state.

[0051] Continue reading Figure 2The tooth block 121 is provided with a guide cavity 1214, and the housing assembly 110 includes a guide shell 111, which is inserted into the guide cavity 1214, and the guide shell 111 and the guide cavity 1214 are slidably matched. The extension direction of the guide shell 111 is consistent with the axial direction of the handle assembly 100, and the cooperation between the guide shell 111 and the guide cavity 1214 on the tooth block 121 enables the tooth block 121 to slide along the axial direction of the handle assembly 100.

[0052] like Figure 3 As shown, the tooth block 121 includes a transmission part 1211, a connecting part 1212 and a supporting part 1213, at least two of which are combined to form a guide cavity 1214. Figure 3 In the illustrated embodiment, the transmission portion 1211, the connecting portion 1212 and the supporting portion 1213 together form the guide cavity 1214. In other embodiments, the transmission portion 1211 and the connecting portion 1212 may together form the guide cavity 1214, or the connecting portion 1212 and the supporting portion 1213 may together form the guide cavity 1214, or the transmission portion 1211 and the supporting portion 1213 may together form the guide cavity 1214.

[0053] The guide cavity 1214 is a shape that is through-connected at both ends of the tooth block 121 along the axial direction. The guide shell 111 of the housing assembly 110 can be inserted into the guide cavity 1214. The cooperation between the guide cavity 1214 and the housing assembly 110 can limit the rotation of the tooth block 121 relative to the housing assembly 110, so that the tooth block 121 can only slide relative to the housing assembly 110 but cannot rotate relative to the housing assembly 110 or rotate along the circumferential direction of the housing assembly 110. There are many ways to achieve this effect. For example, in a cross section perpendicular to the axial direction of the housing assembly 110, the cross-sectional shape of the guide cavity 1214 is the same as the cross-sectional shape of the guide shell 111, but the area of ​​the guide shell 111 is slightly smaller than the area of ​​the guide cavity 1214, so that the tooth block 121 can slide smoothly relative to the guide shell 111. Of course, in other embodiments, other methods can also be used, which are not described here one by one.

[0054] In some embodiments, Figure 1 and Figure 3 As shown, there are two guide cavities 1214 and two guide shells 111, and the guide shells 111 correspond to the guide cavities 1214 one by one. The two guide shells 111 are roughly circular and cut into two halves along the diameter direction to form two half shells that can be combined to form a roughly cylindrical shape. Figure 3As shown, the two guide cavities 1214 are also arranged roughly symmetrically in the diameter direction of the tooth block 121. In other embodiments, there may be more guide cavities 1214 and guide shells 111. Through the cooperation of the guide cavity 1214 and the guide shell 111, the tooth block 121 can only move along the extension direction of the guide shell 111 of the housing assembly 110, that is, the circumferential rotation of the tooth block 121 relative to the housing assembly 110 is limited by the cooperation of the guide shell 111 and the guide cavity 1214. When the drive assembly 122 drives the tooth block 121 through the cooperation of the second thread 1221 and the first thread 12111, the tooth block 121 can only move along the axial direction of the housing assembly 110, but cannot rotate relative to the housing assembly 110.

[0055] Figure 5 FIG. 1 is a schematic diagram of the structure of a delivery assembly 10 in an embodiment of the present application. The delivery assembly 10 in this embodiment is used to deliver a vascular stent 20. Figure 5 The shape shown is not the shape in the process of conveying the vascular stent 20, but a schematic diagram made to illustrate the structure of the conveying component 10. Specifically, the vascular stent 20 is conveyed by the outer sheath core component 202 of the conveying component 10, and the outer sheath core component 202 is used to control whether the distal end of the vascular stent 20 is released. The vascular stent 20 is a tubular structure with two ends through, and the outer sheath core component 202 is penetrated by the vascular stent 20. The vascular stent 20 itself is elastic, and its radial dimension will be compressed after being subjected to radial pressure. The outer sheath core component 202 includes a claw 2022 and an outer core 2021 connected to the claw 2022, and the grasping direction of the claw 2022 is toward the distal end, that is, Figure 5 At the left end shown, the distal end of the vascular stent 20 has a gripping portion, which can be a bare ring. The claw 2022 passes through the gripping portion to grip the distal end of the vascular stent 20, so that the distal end of the vascular stent 20 remains compressed in the radial direction. Figure 5 The right end is shown to be connected to the tooth block 121. When the tooth block 121 is withdrawn toward the proximal end, it can drive the outer core 2021 and the claw 2022 to withdraw toward the proximal end, so that the claw 2022 moves relative to the vascular stent 20, and the distal end of the claw 2022 can be disengaged from the vascular stent 20, that is, the claw 2022 no longer constrains the size of the distal end of the vascular stent 20, so that the vascular stent 20 is released, and the vascular stent 20 can be radially expanded after being released.

[0056] In one embodiment, if Figure 2As shown, the release assembly 120 includes at least two locking members 123, the locking members 123 are threadedly connected to the outer sheath core assembly 202, and the tooth block 121 is locked between the two locking members 123. That is, the tooth block 121 is fixedly connected to the outer core 2021 of the outer sheath core assembly 202 through the two locking members 123. For example, the two locking members 123 can be glued to the outer core 2021, or can be threadedly connected to the outer core 2021.

[0057] Figure 6 This is a schematic diagram of the structure of a delivery assembly 10 in an embodiment of the present application. On the basis of the above embodiment, the delivery assembly 10 in this embodiment further includes an outer sheath 201. The vascular stent 20 is compressed in the outer sheath 201 during delivery, so that the vascular stent 20 can maintain a small radial size during the delivery process, which is convenient for moving in the blood vessel. That is, when the outer sheath 201 moves in the blood vessel, it will drive the vascular stent 20 to move in the blood vessel. When reaching the target position in the blood vessel, the outer sheath 201 will move axially relative to the vascular stent 20, so that the vascular stent 20 is gradually released from the distal end of the outer sheath 201.

[0058] In one embodiment, the proximal end of the outer sheath tube 201 is connected to the housing assembly 110 of the handle assembly 100, and the outer sheath tube 201 can slide relative to the outer sheath core assembly 202, and the outer sheath core assembly 202 is inserted into the outer sheath tube 201. Among them, in various embodiments of the present application, when the A component is inserted into the B component, it means that the B component has an inner cavity, and the A component is inserted into the inner cavity of the B component. The lengths of the A component and the B component are not limited here. For example, the A component may include a portion extending from the inner cavity of the B component.

[0059] When the stent 20 is transported, the outer sheath 201 surrounds the outer periphery of the stent 20, and the outer sheath 201 can move in the blood vessel. At the bifurcation of the blood vessel, or when passing through a curved blood vessel, in order to allow the outer sheath 201 to pass smoothly without scratching the inner wall of the blood vessel, the outer sheath 201 can be made adjustable, such as Figure 7 As shown, Figure 7 The schematic diagram of the structure of the delivery assembly 10 with an adjustable outer sheath tube 201 in one embodiment of the present application is shown. The curvature of the outer sheath tube 201 is adjusted by operating the handle, so that the outer sheath tube 201 can move smoothly in a curved blood vessel.

[0060] Figure 8 and Fig. 9The schematic diagram of the structure of two different forms of the outer sheath tube 201 assembly in one embodiment of the present application. The outer sheath tube 201 is made of a flexible soft material, and the side wall of the outer sheath tube 201 is provided with a bending wire 300, and the bending degree of the outer sheath tube 201 is adjusted by operating the bending wire 300. For example, one end of the bending wire 300 is connected to the outer sheath tube 201, and the other end is pullable. When the bending wire 300 is not pulled, the outer sheath tube 201 is in a free state. The shape of the outer sheath tube 201 in the free state depends on the initial shaping shape of the outer sheath tube 201, which can be curved or straight. When the bending wire 300 is pulled, the bending wire 300 is tightened due to the pulling force, thereby dragging the part of the outer sheath tube 201 connected to the bending wire 300. The outer sheath tube 201 is bent and deformed under the pulling of the bending wire 300, and the degree of bending and deformation depends on the degree to which the bending wire 300 is pulled and tightened. When the bending wire 300 is pulled and becomes very tight, the corresponding bending degree of the outer sheath tube 201 will be relatively large, and when the bending wire 300 is pulled by a smaller force, the corresponding bending degree of the outer sheath tube 201 will be small.

[0061] like Figure 8 As shown, the side wall of the outer sheath tube 201 is provided with a channel 2011 extending in the length direction, and the channel 2011 is provided with an opening 20111 on the outer wall of the outer sheath tube 201. The bending wire 300 enters the channel 2011 through the opening 20111 and extends to the distal end of the outer sheath tube 201. The distal end is Figure 8 The bending wire 300 extends along the channel 2011 and is fixedly connected to the distal end of the outer sheath tube 201. Figure 7 , and the proximal end of the bending adjustment wire 300 extends out from the opening 20111 and is fixedly connected to the tooth block 121B. The tooth block 121B in this embodiment is different from the tooth block 121 connected to the outer sheath core assembly 202 in that the connected parts are different. In other words, one end of the bending adjustment wire 300 is connected to the outer sheath tube 201, and the other end is connected to the tooth block 121B. The bending adjustment wire 300 is driven by the tooth block 121B to move along the axial direction of the driving assembly 122B in the handle assembly 100 to achieve the bending of the outer sheath tube 201.

[0062] In some embodiments, the handle assembly 100 may include a tooth block 121 connected to the outer sheath core assembly 202 and a drive assembly 122 that cooperates with the tooth block 121, and may also include a tooth block 121B connected to the bending wire 300 and a drive assembly 122B that cooperates with the tooth block 121B. In the axial direction of the handle assembly 100, the drive assembly 122 and the drive assembly 122B may be arranged in sequence, for example, the drive assembly 122 is located at the distal end of the drive assembly 122B, and the drive assembly 122 may also be located at the proximal end of the drive assembly 122B.

[0063] It should be noted that in some embodiments of the present application, the structures of the tooth block 121 and the tooth block 121B may be the same or different, and the structures of the drive assembly 122 and the drive assembly 122B may be the same or different.

[0064] In some embodiments of the present application, the drive assembly 122 is an annular structure, and the second thread 1221 is located on the inner surface of the annular structure of the drive housing. It should be noted that the drive assembly 122 may be the drive assembly 122 or the drive assembly 122B in the above embodiments.

[0065] In one embodiment, Figure 1 As shown, the drive assembly 122 is a complete annular structure extending continuously in the circumferential direction, or at least part of the drive assembly 122 is connected and extended in the circumferential direction to form a complete annular structure. In one embodiment, the drive assembly 122 is an annular structure formed by a plurality of structures extending discontinuously in the circumferential direction. Figure 7 As shown, the driving assembly 122B includes a first driving shell 1222 and a second driving shell 1223. The first driving shell 1222 and the second driving shell 1223 can be combined to form an annular structure.

[0066] In some embodiments, Figure 1 and Figure 7 As shown, a side wall of the driving assembly 122 is provided with an observation window 1224 , and the observation window 1224 is used to display the axial position of the tooth block 121 in the driving assembly 122 .

[0067] Since the side wall of the driving assembly 122 is provided with an observation window 1224, the driving assembly 122 is not continuously extended in the circumferential direction at the position of the observation window 1224, but a step or a fault is formed, and the second thread 1221 extends in the annular structure and passes through the step or the fault. In the present application, since the first thread 12111 on the tooth block 121 continuously extends at least one circle in the circumferential direction, it can slide smoothly relative to the second thread 1221 at the step or the fault without jamming.

[0068] for Figure 7 The driving assembly 122B shown includes an annular structure formed by the first driving shell 1222 and the second driving shell 1223. Due to processing errors or installation errors, steps or faults are inevitably formed at the joints, and the second thread 1221 extends in the annular structure and passes through the step or fault. In the present application, since the first thread 12111 on the tooth block 121 extends continuously in the circumferential direction for at least one circle, it can slide smoothly relative to the second thread 1221 at the step or fault without jamming.

[0069] In one embodiment, Figure 4As shown, the delivery assembly 10 includes an outer sheath core assembly 202 and an inner sheath core assembly 203, and the outer sheath core assembly 202 and the inner sheath core assembly 203 cooperate to control whether the vascular stent 20 is released. The outer sheath core assembly 202 includes an outer core 2021 and a claw 2022 connected to the outer core 2021, and the inner sheath core assembly 203 includes an inner core 2032 and an end 2031 connected to the inner core 2032. The outer core 2021 is a tube structure with a lumen, and the inner core 2032 is inserted into the outer core 2021, and the inner core 2032 and the outer core 2021 can slide relative to each other, that is, the inner core 2032 can be slidably inserted into the lumen of the outer core 2021. The end 2031 has a step structure 20311, as shown in FIG. Figure 5 As shown, the distal end of the claw 2022 can be abutted against the step structure 20311 of the end 2031, thereby sealing the distal end of the claw 2022, so that the distal end of the stent 20 is sealed in the annular closed loop space formed by the claw 2022 and the step structure 20311. When the stent is needed, the inner core 2032 and the outer core 2021 are moved relative to each other to drive the claw 2022 to disengage from the step structure 20311, the annular closed loop space is broken, and the distal end of the stent 20 can be disengaged from the claw 2022 to achieve release.

[0070] That is to say, the conveying component 10 includes an inner sheath core component 203 that can slide axially relative to the outer sheath core component 202, and the inner sheath core component 203 includes an end 2031 and an inner core 2032 connected to the end 2031. The claws 2022 and the end 2031 can be in a conflicting state and a separated state, and in the conflicting state, a closed-loop space is formed for hooking the vascular stent 20.

[0071] In one embodiment, the delivery assembly 10 includes an outer sheath tube 201 having a lumen, and the outer sheath core assembly 202 is slidably disposed in the lumen of the outer sheath tube 201, and the outer sheath tube 201 is used to accommodate the radially compressed vascular stent 20. Figure 4 As shown, the delivery assembly 10 includes a support rod 204 fixedly connected to the outer core 2021, the support rod 204 is inserted into the lumen of the outer sheath tube 201, the diameter of the support rod 204 is larger than the diameter of the outer core 2021, and a mounting position 2041 for mounting the vascular stent 20 is formed between the distal end of the support rod 204 and the claw 2022, as shown in FIG. Figure 6 As shown, when the vascular stent 20 is compressed in the outer sheath 201, the distal end of the support rod 204 is used to abut the end of the vascular stent 20. By abutting the proximal end of the vascular stent 20 by the support rod 204, the proximal end position of the vascular stent 20 is limited, which facilitates the control of the position of the vascular stent 20 in the outer sheath 201.

[0072] One embodiment of the present application further provides a medical device, comprising the delivery component 10 in any one of the above embodiments and also comprising a vascular stent 20 delivered by the delivery component 10 .

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A conveying assembly, characterized in that: The invention comprises a handle assembly, wherein the handle assembly comprises a housing assembly and a release assembly, wherein the housing assembly has an inner cavity, and the release assembly comprises: A tooth block, the tooth block is arranged in the inner cavity of the housing component, the housing component limits the circumferential rotation of the tooth block, the side circumference of the tooth block is provided with a first thread, the first thread extends continuously in the circumferential direction for at least one circle, and A drive assembly is rotatably connected to the housing assembly in the circumferential direction, and the drive assembly has a second thread that cooperates with the first thread. The cooperation between the first thread and the second thread is used to convert the circumferential rotation of the drive assembly relative to the housing assembly into axial sliding of the tooth block relative to the housing assembly.

2. The conveying assembly according to claim 1, characterized in that: The tooth block includes a transmission part, a connecting part and a supporting part. The transmission part is an annular structure with an internal space. The connecting part and the supporting part are located in the internal space. The supporting part connects the transmission part and the connecting part. The first thread is arranged on the outer periphery of the transmission part.

3. The conveying assembly according to claim 2, characterized in that: The delivery component is used to deliver a vascular stent, and the delivery component includes an outer sheath core component, and the outer sheath core component is used to control whether the distal end of the vascular stent is released. The outer sheath core component is connected to the tooth block and moves axially along the handle component under the drive of the tooth block to achieve the release of the vascular stent.

4. The conveying assembly according to claim 3, characterized in that: The connecting portion and / or the supporting portion and / or the transmission portion together form a guide cavity; The housing component comprises a guide shell, the guide shell is inserted into the guide cavity, and the guide shell and the guide cavity are slidably matched, so that the tooth block can move along the axial direction of the housing component but cannot rotate around the circumference of the housing component.

5. The conveying assembly according to claim 4, characterized in that: There are at least two guide cavities, and the number of the guide shells corresponds to the number of the guide cavities.

6. The conveying assembly according to claim 3, characterized in that: The release assembly comprises at least two locking members, the locking members are threadedly connected to the outer sheath core assembly, and the tooth block is locked between the two locking members.

7. The conveying assembly according to claim 2, characterized in that: The conveying assembly includes an outer sheath tube, a side wall of the outer sheath tube is provided with a bending wire, one end of the bending wire is connected to the outer sheath tube, and the other end is connected to the tooth block. The bending wire moves axially along the handle assembly under the drive of the tooth block to achieve bending of the outer sheath tube.

8. The conveying assembly according to claim 1, characterized in that The driving assembly is an annular structure, and the second thread is located on the inner surface of the annular structure of the driving shell.

9. The conveying assembly according to claim 8, characterized in that The driving assembly includes a first driving shell and a second driving shell, and the first driving shell and the second driving shell can be matched to form the annular structure.

10. The conveying assembly according to claim 1, characterized in that The side wall of the driving assembly is provided with an observation window for displaying the axial position of the tooth block in the driving assembly.

11. The conveying assembly according to claim 1, characterized in that The conveying assembly comprises an outer sheath-core assembly, the outer sheath-core assembly comprises an outer core and a clamping claw, and two ends of the outer core are respectively connected to the clamping claw and the tooth block; The delivery assembly is used to deliver the vascular stent, and the state in which the distal end of the vascular stent is compressed in the radial direction is called a compressed state, and the state in which the distal end of the vascular stent is expanded in the radial direction relative to the compressed state is called an expanded state; The clamping claw is used to hook the vascular stent to keep the vascular stent in the compressed state. The outer core can also move axially relative to the vascular stent to release the state of hooking the vascular stent, so that the vascular stent can be transformed from the compressed state to the expanded state.

12. The conveying assembly according to claim 11, characterized in that The conveying component includes an inner sheath core component that can slide axially relative to the outer sheath core component, and the inner sheath core component includes an end and an inner core connected to the end. The claws and the end can be in a conflicting state and a separated state, and in the conflicting state, a closed-loop space is formed for hooking the vascular stent.

13. The conveying assembly according to claim 12, characterized in that The outer core is a tubular structure with a lumen, and the inner core is slidably arranged in the lumen of the outer core.

14. The conveying assembly according to claim 11, characterized in that The delivery component comprises an outer sheath tube having a lumen, the outer sheath core component is slidably arranged in the lumen of the outer sheath tube, and the outer sheath tube is used to accommodate a vascular stent compressed in a radial direction.

15. The conveying assembly according to claim 14, characterized in that The conveying assembly includes a support rod fixedly connected to the outer core, the support rod is inserted into the lumen of the outer sheath, the diameter of the support rod is larger than the diameter of the outer core, and a mounting position for mounting the vascular stent is formed between the distal end of the support rod and the claw, and when the vascular stent is compressed in the outer sheath, the distal end of the support rod is used to abut the end of the vascular stent.

16. A medical device, characterized in that: The invention comprises the delivery component according to any one of claims 1 to 15, and also comprises a vascular stent delivered by the delivery component.

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