Conveyor

Abstract

According to the conveyor provided by the invention, the locking assembly which cannot rotate at least in the circumferential direction relative to the screw rod is arranged, and the locking assembly is used for establishing locking connection with the movable handle, so that the locking assembly is matched with a tooth block structure arranged on the movable handle after being connected to limit the movement of the movable handle in the axial direction and the circumferential direction; it is ensured that the movable handle can be locked and fixed by the locking assembly when the movable handle moves till the support is completely released from the sheathing canal and the movable handle is located at any position of the screw rod, an operator can conveniently hold the movable handle to conduct subsequent surgical operation, and the sheathing canal cannot continue to move in the body to generate adverse effects.

Description

Technical Field

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

[0002] Aortic diseases such as aortic aneurysm and aortic dissection are among the most deadly and difficult to treat vascular surgical diseases. Traditional treatment methods are surgical operations, which have the risk of large surgical trauma and high mortality rate. In recent years, a minimally invasive and simple interventional surgical method has been developed, in which a covered stent is implanted into the diseased blood vessel. The covered stent adheres closely to the inner wall of the blood vessel, isolating the vascular lesion from the blood flow. The covered stent allows normal blood circulation, protects the diseased blood vessels, and effectively repairs vascular lesions. At present, most of the conveyor structures on the market are in the form of a combination of a fixed handle and a movable handle, and when the conveyor device releases the stent, it is easy to cause the stent to stack or twist, which will have an adverse effect on the accuracy of the stent release, and in severe cases, it will lead to surgical failure.

[0003] At present, most of the delivery devices on the market are in the form of a combination of a fixed handle and a movable handle. After the stent is released from the sheath, further post-release operations are usually still required to completely release the stent into the blood vessel. However, during the post-release operation of the proximal end of the stent, the doctor usually performs the post-release operation with one hand and uses the other hand to hold the handle for leverage. During this process, the fixed handle is usually located at the front end of the delivery device, and the post-release structure is located at the rear end of the delivery device. In addition, the delivery device is relatively long as a whole, and it is not convenient for the doctor to use leverage by holding the fixed handle, resulting in an unsmooth operation. Secondly, if the doctor holds on to the movable handle, the sheath may continue to move in the body, which is not conducive to the post-release of the stent and may accidentally touch the stent to cause displacement, resulting in an inaccurate release position. Summary of the invention

[0004] Based on this, the present invention proposes a conveyor to at least solve the problem that after the stent is released, the movable handle is misoperated so that the sheath tube continues to move.

[0005] To achieve this object, the present invention adopts the following technical scheme: a conveyor, including a sheath core assembly and a conveying handle, the sheath core assembly including a sheath tube and a sheath tube joint connected to the proximal end of the sheath tube, the conveying handle including a fixed handle and a movable handle, the proximal side of the fixed handle is connected to a screw rod, the movable handle is sleeved on the screw rod, the sheath tube joint is arranged in the screw rod, and passes through the side wall of the screw rod to be connected to the movable handle; the movable handle includes an active state of rotating or dragging relative to the screw rod to adjust the axial position, and the conveying handle also includes a locking assembly, the locking assembly is used to establish a locking connection with the movable handle, and limit the active state of the movable handle after connection.

[0006] In one embodiment, the movable handle includes a housing, a tooth block, and a switching device connected to the tooth block. Spaced grooves extending along the axial length are respectively formed on two opposite side walls of the screw rod, and two radially opposite sides of the sheath tube joint respectively extend out from the spaced grooves. The switching device is used to control the switching of the tooth block between meshing with and disengaging from the outer wall of the screw rod.

[0007] In one embodiment, the locking assembly includes a mounting portion coaxially arranged with the screw rod, and the mounting portion is fixed relative to the screw rod at least circumferentially; a first limiting member is provided on the mounting portion, and a second limiting member is provided at an end of the housing axially opposite to the mounting portion. When the first limiting member and the second limiting member are in the same axial position, they can be fixedly connected.

[0008] In one embodiment, the mounting portion is slidably sleeved on the screw rod, and at least two circumferential limiting blocks are provided on the inner wall of the mounting portion. The circumferential limiting blocks respectively pass through the spaced grooves and extend into the inner cavity of the screw rod.

[0009] In one embodiment, the first limiting member is provided at an end of the mounting portion opposite to the housing. The first limiting member includes a plurality of first clamping grooves arranged circumferentially; a sliding groove is formed on the outer side wall of the housing close to the mounting portion. The sliding groove has an axial length. The second limiting member includes a sliding block, and a clamping block extending inwards towards the housing is provided on the sliding block. The sliding block is arranged in the sliding groove and can slide axially along the sliding groove; when the sliding block slides to the side close to the mounting portion, the clamping block is clamped in any one of the first clamping grooves.

[0010] In one embodiment, a plurality of clamping holes are formed circumferentially on the outer side wall of the housing close to the mounting portion. The first limiting member is provided on the outer side wall of the mounting portion close to the housing. The first limiting member includes an insertion portion and a movable portion. One end of the movable portion is movably connected to the mounting portion, and the other end is connected to the insertion portion. The movable portion can control the insertion portion to approach or move away from the housing; when the insertion portion approaches the housing, the insertion portion is inserted into any one of the clamping holes.

[0011] In one embodiment, an end of the housing axially provided with the second limiting member is rotatably connected to the mounting portion circumferentially.

[0012] In one embodiment, a plurality of second clamping grooves are formed circumferentially on the outer side wall of the housing close to the end of the mounting portion. The first limiting member is provided with a clamping post on the outer side wall of the mounting portion. When the mounting portion and the second clamping grooves are in the same axial position, the clamping post is inserted into any one of the second clamping grooves.

[0013] In one embodiment, a plurality of elastic claws are provided on the outer sidewall of the mounting portion. The elastic claws include an extension portion extending in a direction parallel to the longitudinal axis of the housing. A limiting block is provided on the distal side of the extension portion. The limiting block converges towards the screw rod direction in a state where the elastic claw is not subjected to an external force and engages with the screw rod.

[0014] In one embodiment, a rear release assembly is connected to the proximal end of the screw rod. The sheath core assembly further includes an inner sheath core disposed within the sheath tube. The rear release assembly includes a clamping portion and a rotating cap. A gripper is inserted into the clamping portion, and the outer wall is in threaded engagement with the inner wall of the rotating cap. The rotating cap is provided with an inwardly protruding pressing portion. The inner sheath core passes through the clamping portion, the rotating cap, and the gripper at the same time. The pressing portion moves axially along with the rotation of the rotating cap to press against or away from the gripper, so that the gripper clamps or releases the inner sheath core.

[0015] In one embodiment, the inner cavity of the clamping portion is provided with a plug-in groove having a non-circular radial cross-section. The plug-in portion of the gripper inserted into the plug-in groove has the same non-circular radial cross-section.

[0016] The advantage of the present invention is that, compared with the prior art, the present invention provides a conveyor. By providing a locking assembly that is at least non-rotatable circumferentially relative to the screw rod, the locking assembly is used to establish a locking connection with the movable handle. Thus, after the locking assembly is connected, in cooperation with the tooth block structure provided on the movable handle, the movement of the movable handle in the axial and circumferential directions is restricted, ensuring that when the movable handle moves to any position of the screw rod after the stent is completely released from the sheath tube, it can be locked and fixed by the locking assembly, facilitating the operator to hold the movable handle for subsequent surgical operations without causing adverse effects due to the continuous movement of the sheath tube in the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the conveyor in Embodiment 1 of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the conveying handle in Embodiment 1 of the present invention;

[0019] Figure 3 Exploded view of the conveying handle in Embodiment 1 of the present invention;

[0020] Figure 4 Schematic diagram of the tooth block structure in Embodiment 1 of the present invention;

[0021] Figure 5 Schematic diagram of the structure of the rear release assembly in Embodiment 1 of the present invention;

[0022] Figure 6 Schematic diagram of the structure of the locking assembly in Embodiment 1 of the present invention;

[0023] Figure 7 Exploded view of the locking component in Embodiment 1 of the present invention;

[0024] Figure 8 Schematic structural diagram of the gripper in Embodiment 1 of the present invention;

[0025] Figure 9 Schematic structural diagram of the cap screwing structure in Embodiment 1 of the present invention;

[0026] Figure 10 Schematic structural diagram of the first limiting member and the clamping portion in Embodiment 1 of the present invention

[0027] Figure 11 Schematic structural diagram of the locking component in the conveyor in Embodiment 2 of the present invention;

[0028] Figure 12 Schematic structural diagram of the locking component in the upper housing in Embodiment 2 of the present invention;

[0029] Figure 13 Schematic structural diagram of the upper housing in Embodiment 2 of the present invention;

[0030] Figure 14 Schematic structural diagram of the first limiting member of the locking component in Embodiment 2 of the present invention;

[0031] Figure 15 Schematic structural diagram of the second limiting member in Embodiment 2 of the present invention;

[0032] Figure 16 Schematic structural diagram of the locking component in the upper housing in Embodiment 3 of the present invention;

[0033] Figure 17 Schematic structural diagram of the upper housing in Embodiment 3 of the present invention;

[0034] Figure 18 Schematic structural diagram of the installation portion of the locking component in Embodiment 3 of the present invention;

[0035] Figure 19 Schematic structural diagram of the first limiting member of the locking component in Embodiment 2 of the present invention;

[0036] Figure 20 Schematic structural diagram of the locking component in the conveyor in Embodiment 4 of the present invention;

[0037] Figure 21 Schematic structural diagram of the second limiting member in the outer shell in Embodiment 4 of the present invention;

[0038] Figure 22 Schematic structural diagram of the first limiting member of the locking component in Embodiment 4 of the present invention. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0040] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude 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 to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0041] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0042] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" another element or feature will then be oriented as "above" or "over" the other element or feature. Thus, the exemplary term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are accordingly interpreted.

[0043] It should also be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the direction of the rotation center axis of an object such as a cylinder or a tube is defined as the axial direction; the circumferential direction is the direction around the axis of an object such as a cylinder or a tube (perpendicular to the axis and also perpendicular to the cross-sectional radius); the radial direction refers to the direction along the diameter or radius. It should be noted that regardless of the "end" in words such as "proximal end", "distal end", "one end", "the other end", "the first end", "the second end", "the initial end", "the terminal end", "both ends", "the free end", "the upper end", "the lower end", etc., it is not limited to the end head, endpoint or end face, but also includes the part that extends an axial distance and / or a radial distance on the element to which the end head, endpoint or end face belongs from the end head, endpoint or end face. The above definitions are only for convenience of expression and should not be construed as a limitation on the present invention.

[0044] Embodiment 1

[0045] Please refer to Figures 1 - 2, the conveyor 100 provided in this application is used to load a stent, and the stent can be a luminal instrument, such as a luminal stent. Hereinafter, the luminal stent will be taken as an example for illustration. The stent includes a support skeleton and a film covering the support skeleton. The film is coated on the support skeleton to form a luminal structure. A bare wave ring is provided at the distal end of the support skeleton for hooking and positioning; the conveyor 100 includes a conveying handle 2, a sheath core assembly 1, and a post-release assembly 3. The conveying handle 2 includes a fixed handle 21 and a movable handle 22. The fixed handle 21 is connected with a screw 23. The movable handle 22 is sleeved on the screw 23 and can slide axially or rotate circumferentially relative to the screw 23 to achieve axial movement; the sheath core assembly 1 includes a sheath tube and a sheath tube joint 225 connected to the proximal end of the sheath tube. The sheath tube is movably connected to the movable handle 22 through the sheath tube joint 225, and the movable handle 22 controls the axial sliding of the sheath tube; the sheath tube is used to accommodate the stent in a compressed state. When the sheath tube slides axially towards the proximal end, the stent disengages from the distal end of the sheath tube and is released. The released stent self-expands and anchors on the blood vessel wall to achieve partial release; the sheath tube penetrates into the inner cavity from the distal end of the conveying handle 2 and is connected to the movable handle 22; the post-release assembly 3 is fixedly connected to the proximal end of the screw 23 of the conveying handle 2. The sheath core assembly 1 further includes an inner sheath core 11. After connection, the inner sheath core 11 can movably penetrate through the sheath tube; an anchoring member for anchoring the stent is provided on the side wall of the inner sheath core 11 near the distal end. The anchoring member has a plurality of claw structures for hooking the stent, and a guiding head is connected to the distal end of the inner sheath core 11, and an outer joint 12 is connected to the proximal end of the inner sheath core 11; the post-release assembly 3 is used to control the switching of the inner sheath core 11 between a locked state and an axially slidable unlocked state. When the post-release assembly 3 of the conveyor 100 is in the unlocked state, the inner sheath core 11 can slide axially relative to the sheath tube, so that the anchoring member slides axially a certain distance, so that the part of the stent hooked on the anchoring member is released from the hooked state to achieve the complete release of the stent.

[0046] Among them, please continue to refer to Figure 3 and Figure 4, the movable handle 22 includes a housing, a jaw block 221, and a switching device 224 connected to the jaw block 221. For the convenience of disassembly and assembly, the housing has an upper and lower mating structure, and the movable handle 22 includes a mating upper housing 222 and a lower housing 223. The screw 23 passes through the fixed handle 21 and the movable handle 22, and the jaw block 221 and the sheath tube joint 225 are located inside the movable handle 22; the screw 23 includes an upper screw 231 and a lower screw 232 that are radially mated, and axial spacing grooves 233 extending in the axial direction are provided at both sides of the mating portion of the upper screw 231 and the lower screw 232, so that two symmetrically arranged spacing grooves 233 are provided on the mated screw 23. The proximal end of the sheath tube extends into the screw 23 of the delivery handle 2, and two of the radial sides of the sheath tube joint 225 respectively extend out from the spacing grooves 233 on both sides. The sheath tube joint 225 is relatively fixed to the sheath tube, and the sheath tube joint 225 can axially move along the spacing grooves 233, and the sheath tube axially moves with the movement of the sheath tube joint 225; there are three jaw blocks 221, and the three jaw blocks 221 are spaced along the circumferential direction of the screw 23. The switching device 224 is used to control the switching of the jaw block 221 between meshing and disengaging from the outer wall of the screw 23. The switching device 224 keeps the jaw block 221 in the first meshing state without external force, and makes the jaw block 221 in the second disengaged state under external force; when in the first state, the movable handle 22 can adjust its axial position on the screw 23 by rotating along the screw 23, and when in the second state, the movable handle 22 can adjust its axial position on the screw 23 by dragging; in order to limit the movement state of the movable handle 22, please refer to Figure 6 , the delivery handle 2 further includes a locking assembly 4, and the locking assembly 4 is used to establish a locking connection with the movable handle 22. The locking connection enables the locking assembly 4 to form a locking structure for the movable handle 22 to limit the movement state of the movable handle 22.

[0047] Furthermore, please refer to Figure 6 and Figure 7, the locking assembly 4 includes a mounting portion 41 coaxially arranged with the screw rod 23. The mounting portion 41 is used to sleeve or fix on the screw rod 23, and the mounting portion 41 is at least circumferentially fixed relative to the screw rod 23. It can be understood that the mounting portion 41 itself is non-rotatable circumferentially, so that after establishing a locking connection with the movable handle 22, it can restrict the circumferential rotation of the movable handle 22. Preferably, the mounting portion 41 is provided with a first limiting member 42, and the second limiting member 226 is provided at one end of the housing axially opposite to the mounting portion 41. When the first limiting member 42 and the second limiting member 226 are in the same axial position, they can be fixedly connected. It can be understood that the mounting portion 41 and the second limiting member 226 of the housing of the movable handle 22 should be arranged on the same side. When the second limiting member 226 is arranged on the distal side of the housing, the mounting portion 41 is arranged on the distal side of the screw rod 23; when the second limiting member 226 is arranged on the proximal side of the housing, the mounting portion 41 is arranged on the proximal side of the screw rod 23. The first limiting member 42 and the second limiting member 226 are two structures that can be adaptively connected, such as insertion connection, snap connection, etc. After connection, the mounting portion 41 and the movable handle 22 form an integral body, so that the circumferential rotation and axial movement of the mounting portion 41 and the circumferential rotation and axial movement of the movable handle 22 affect each other.

[0048] In this embodiment, please refer to Figure 5 , the rear release assembly 3 is connected to the proximal end of the screw rod 23. The rear release assembly 3 includes a clamping portion 31 and a screw cap 33. The clamping portion 31 has a cylindrical structure. The inner cavity is provided with a plug-in groove 311 having a non-circular radial cross-section, and the outer wall is provided with an external thread; please refer to Figure 8 and Figure 10 , a gripper 32 is inserted into the plug-in groove 311 of the clamping portion 31. The plug-in portion 321 of the gripper 32 inserted into the plug-in groove 311 has the same non-circular radial cross-section. Here, the setting of the plug-in portion 321 of the gripper 32 with a non-circular radial cross-section enables the inner sheath core 11 to be unable to rotate after being gripped by the gripper 32, so as to achieve the effect of circumferential limit. The distal end of the inner sheath core 11 is used to anchor the stent. With such a setting, it can effectively prevent the rotation of the inner sheath core 11 driven by the rotation of the screw cap 33 during rear release, resulting in the torsion or displacement of the stent; the outer wall of the clamping portion 31 is in threaded cooperation with the inner wall of the screw cap 33. Among them, please refer to Figure 9, the screw cap 33 is provided with an inwardly protruding pressing portion 331. The protruding top end of the pressing portion 331 is a flared opening, which is more conducive to receiving and covering the clamping end 322 of the gripper 32. Moreover, the tapered structure of the flared shape can continuously increase the pressing force on the gripper 32 as the pressing portion 331 moves towards the gripper 32; the inner sheath core 11 simultaneously passes through the clamping portion 31, the screw cap 33 and the gripper 32. The pressing portion 331 moves axially along with the rotation of the screw cap 33 to press or move away from the gripper 32, so that the gripper 32 clamps or releases the inner sheath core 11; the screw cap 33 and the clamping portion 31 form a structure that releases after screwing, which can provide a post-release with unlimited stroke, improve the efficiency of the post-release at the same time, and shorten the operation time; further, the movable handle 22 is circumferentially and axially limited by the locking assembly 4, so that the operator can hold the conveyor 100 at any position to perform the post-release operation, and there will be no problem that the screw cap 33 cannot be rotated by holding the movable handle 22, nor the problem that the sheath tube slides randomly due to accidental contact with the movable handle 22.

[0049] Please continue to refer further to Figure 14 , Figure 18 and Figure 22 , in order to make the mounting portion 41 fixed relative to the screw rod 23 at least circumferentially and unable to rotate circumferentially relative to the screw rod 23, at least two circumferential limiting blocks 44 are provided on the inner wall of the mounting portion 41 sleeved on the screw rod 23. The circumferential limiting blocks 44 respectively pass through the spacing grooves 233 from the outside of the screw rod 23 and extend into the inner cavity of the screw rod 23. Among them, the thickness of the circumferential limiting blocks 44 is similar to or the same as the width of the spacing grooves 233, so that when the mounting portion 41 rotates, it is restricted by the upper screw rod 231 and the lower screw rod 232 of the screw rod 23 and thus cannot rotate circumferentially. In this way, when the mounting portion 41 is locked and connected to the movable handle 22, the movable handle 22 is restricted by the mounting portion 41 and cannot rotate circumferentially. Therefore, the switching device 224 of the movable handle 22 is not affected by external forces, and the circumferential rotation of the movable handle 22 is restricted, so that the movable handle 22 can be fixed at any position after stopping at any position of the screw rod 23 by establishing a locking connection with the mounting portion 41. When medical staff hold the movable handle 22 to perform other release operations, such as the post-release operation of the stent, the movable handle 22 always remains stationary, so that the sheath tube can be prevented from moving further in the body, ensuring the stability and safety of subsequent operations.

[0050] In this embodiment, please refer to Figure 7 and Figure 10, the locking component 4 can be fixedly connected to the proximal end of the screw rod 23 and is detachably connected to the screw rod 23 through the mounting portion 41. The first limiting member 42 is disposed on the outer side wall of the mounting portion 41 and includes a plurality of first retaining pieces 421 protruding circumferentially. The plurality of first retaining pieces 421 are spaced apart from each other, and a slot 422 is formed between adjacent first retaining pieces 421. The outer diameter of the mounting portion 41 is the same as the outer diameter of the screw rod 23 and they are coaxially arranged. When the housing of the movable handle 22 slides axially to the position of the mounting portion 41, at least the proximal side of the housing is in the same axial position as the mounting portion 41 and covers the surface of the mounting portion 41; an insertion block is provided on the inner wall of the proximal end of the housing. The thickness of the insertion block is less than or equal to the width of the slot 422. Thus, when the proximal side of the housing is in the same axial position as the mounting portion 41, the insertion block is inserted into any one of the slots 422, and the adjacent first retaining pieces 421 limit the circumferential rotation of the housing, thereby limiting the circumferential rotation of the movable handle 22. At this time, when the tooth block 221 is engaged with the screw rod 23, the movable handle 22 cannot move axially and circumferentially, forming a fixed structure. Even if medical staff hold the movable handle 22 for subsequent surgical operations, it will not affect the sheath tube in the body. Preferably, a blocking member can be provided on the proximal side of the slot 422 to prevent the insertion block from being inserted excessively and sliding out of the slot 422 from the proximal end.

[0051] Embodiment 2

[0052] Please refer to Figures 11 - 15 , in this embodiment, the sheath core assembly 1 and the delivery handle 2 of the delivery device 100 are substantially the same as those in Embodiment 1. The difference lies in that the locking component 4 is sleeved on the outer side of the screw rod 23 by sleeving. The first limiting member 42 of the mounting portion 41 is disposed at one end of the mounting portion 41 opposite to the housing, and at least the outer diameter of one end of the mounting portion 41 opposite to the housing is less than or equal to the inner diameter of the housing. Thus, the first limiting member 42 at the end of the mounting portion 41 can extend into one end of the housing; the first limiting member 42 includes a plurality of first clamping grooves 423 arranged circumferentially. The first clamping grooves 423 can be formed by the gaps between adjacent two of a plurality of second retaining pieces 424 arranged circumferentially at the end of the mounting portion 41, or can be formed by a plurality of recessed slots formed by axially cutting the end of the mounting portion 41; Please refer to Figure 13 and Figure 15, a chute 228 is provided on the outer side wall of the housing close to the mounting portion 41. The chute 228 has an axial length. The second limiting member 226 includes a slider 2263. The slider 2263 is provided with a clamping block 2262 extending inwards towards the housing and a buckle 2261 extending towards the inner cavity of the housing. The buckle 2261 can clamp the slider 2263 on the chute 228 and can slide without disengaging from the chute 228. The slider 2263 can slide axially along the chute 228. When the slider 2263 slides to the side close to the mounting portion 41, the clamping block 2262 slides to the position of the first clamping groove 423 and the clamping block 2262 is clamped in any one of the first clamping grooves 423, realizing the circumferential limiting of the clamping block 2262 by the clamping groove, and further restricting the circumferential rotation of the housing. At this time, when the tooth block 221 is engaged with the screw rod 23, the movable handle 22 cannot move axially and circumferentially, forming a fixed structure.

[0053] Preferably, please continue to refer to Figure 14 , in order to make the clamping block 2262 have better accessibility when cooperating with the first clamping groove 423, the edge of the second baffle 424 and / or the clamping block 2262 has an arc transition or a fillet so that when the alignment is inaccurate, it can slide into the first clamping groove 423 relying on the arc transition or the fillet. Among them, the arc transition or the fillet of the second baffle 424 can be only provided at the top corner position protruding outwards, and not provided at other positions, so as to at least ensure good accessibility when the clamping block 2262 enters.

[0054] In this embodiment, please refer to Figure 12 and Figure 14, the installation part 41 can be arranged independently of the housing and can slide axially along the screw rod 23. After the movable handle 22 controls the sheath to retract and the stent disengages from the sheath, the installation part 41 slides to the position of the movable handle 22 and establishes a locking connection with the movable handle 22 to restrict the movement of the movable handle 22. In a preferred embodiment, a T-shaped boss structure 45 is provided at the end of the installation part 41 opposite to the housing, and the cross-section of the T-shaped boss structure 45 in the axial direction has a T-shaped cross-section. The maximum outer diameter of the T-shaped boss structure 45 is less than or equal to the inner diameter of the housing and can be inserted into the housing. A follow-up groove 43 is formed between the T-shaped boss structure 45 and the end of the installation part 41. A follow-up plate 227 extends axially from the end of the housing opposite to the installation part 41, and the follow-up plate 227 is clamped in the follow-up groove 43, so that the installation part is axially fixed relative to the movable handle 22 and can rotate relatively in the circumferential direction. When the movable handle 22 and the installation part 41 do not establish a locking connection, the installation part 41 can be axially slid or circumferentially rotated. The installation part 41 of the follow-up structure and the movable handle 22 have better integrity, and compared with the independent setting method, it can reduce the complexity of the doctor's operation of the locking connection, enable the movable handle 22 to quickly switch between the locked state and the movable state, and avoid unnecessary rotation of the sheath during the switching process. Moreover, when the conveyor 100 is in an unused state, by establishing a locking connection between the installation part 41 and the movable handle 22, the movable handle 22 is always in the locked state axially and circumferentially. Compared with the existing method of locking the movable handle 22 by screwing it to generate friction with the fixed handle 21, the locking assembly 4 provided in this application can maintain a good locking structure of the movable handle 22 even if it collides during long-term storage and transportation, avoiding the risk of unlocking.

[0055] Embodiment 3

[0056] In this embodiment, please refer to Figures 16 - 19 , the sheath core assembly 1 and the conveying handle 2 of the conveyor 100 are substantially the same as those in Embodiment 1 and Embodiment 2. The difference is that the locking assembly 4 is sleeved outside the screw rod 23 by a sleeving method. The first limiting member 42 of the installation part 41 is arranged at the end of the installation part 41 opposite to the housing. Among them, please refer to Figure 17 , a plurality of card holes 2264 are circumferentially formed in the outer side wall of the housing close to the installation part 41 along the circumferential direction of the second limiting member 226, and the plurality of card holes 2264 are arranged at intervals. A first limiting member 42 is arranged on the outer side wall of the installation part 41 close to the housing, and the first limiting member 42 is adapted to the card holes 2264 to establish a locking connection. Please refer to Figure 18 and Figure 19, the first limiting member 42 includes an insertion portion 426 and a movable portion 425. One end of the movable portion 425 is movably connected to the mounting portion 41, and the other end is connected to the insertion portion 426. The movable portion 425 can control the insertion portion 426 to approach or move away from the housing. When the insertion portion 426 approaches the housing, the insertion portion 426 is inserted into any one of the card holes 2264. Wherein, a receiving groove 411 is formed on the outer side wall of the mounting portion 41, and the first limiting member 42 can be disposed in the receiving groove 411 for storage, reducing the area protruding from the conveyor 100. Further, a rotating shaft 412 can be provided at the positions of the two side walls of the receiving groove 411 in the circumferential direction, and one end of the movable portion 425 is rotatably connected to the rotating shaft 412. In this way, the movable portion 425 can control the insertion portion 426 at the other end to approach or move away from the housing by flipping along the rotating shaft 412.

[0057] In another embodiment, please refer to Figure 18 , a receiving groove 411 is formed on the outer side wall of the mounting portion 41. Slide rails are provided at the two side portions of the receiving groove 411 in the circumferential direction. Sliding members extending into the slide rails are provided on the two circumferential sides of one end of the movable portion 425, so that the movable portion 425 can slide axially along the slide rails, thereby controlling the insertion portion 426 at the other end to approach or move away from the housing. With such a setting, the insertion portion 426 is set as an elastic member, and can elastically control the entry and exit of the card hole 2264 when the insertion portion 426 approaches the card hole 2264; or the insertion portion 426 is set as a movable member that can slide in and out of the card hole 2264 along the radial direction, and slides to control the entry and exit of the card hole 2264.

[0058] Preferably, please refer to Figure 19 , the insertion portion 426 includes an extension plug 427 that enters the card hole 2264. The extension plug 427 can be provided with a radial length, and the extension plug 427 can extend to the surface thread of the screw 23 and engage with the surface thread. With such a setting, after the locking assembly 4 of this embodiment is locked to the housing of the movable handle 22, while the circumferential limit of the housing is realized by the two circumferential limit blocks 44, the engagement between the extension plug 427 and the surface thread can form an axial limit. Thus, further, even when the switching device 224 of the movable handle 22 controls the tooth block 221 to disengage from the screw 23, the locking assembly 4 can still realize the axial and circumferential limits of the movable handle 22.

[0059] In this embodiment, please refer to Figure 16 and Figure 18 , the mounting portion 41 can be connected to the movable handle 22 through a follow-up structure as in Embodiment 2 to achieve the same effect. The specific structure has been described in Embodiment 2 and will not be elaborated here.

[0060] Embodiment 4

[0061] In this embodiment, please refer to Figures 20 - 22, the sheath core assembly 1 of the conveyor 100 and the conveying handle 2 are substantially the same as those in Embodiments 1 to 3. The difference is that, please refer to Figure 21 , a plurality of second card slots 2265 are circumferentially formed in the second limiting member 226 along the end of the housing close to the mounting portion 41. Please refer to Figure 22 , the first limiting member 42 is provided with a clamping post 428 on the outer side wall of the mounting portion 41. When the mounting portion 41 and the second card slot 2265 are in the same axial position, the clamping post 428 is inserted into any one of the second card slots 2265; the mounting portion 41 can slide along the axial direction of the screw rod 23, and the outer diameter of the mounting portion 41 is smaller than the outer diameter of the second limiting component. Thus, when the mounting portion 41 slides to the end position of the housing, the mounting portion 41 can be opposite to the end side wall of the housing provided with the second limiting component at the same axial position. Since a plurality of second card slots 2265 are formed at this position, the clamping post 428 is inserted into the card slot to form a circumferential limit on the housing.

[0062] Preferably, please further refer to Figure 22 , in this embodiment, in order to enable the locking component 4 to still limit the axial sliding of the movable handle 22 even when the user accidentally touches the switching device 224 to control the tooth block 221 to disengage from the outer wall of the screw rod 23, a plurality of elastic claws 47 are provided on the outer side wall of the mounting portion 41. The elastic claw includes an extension portion 471 extending along a direction parallel to the longitudinal axis of the housing. One end of the extension portion 471 extends towards one end of the mounting portion 41 and exceeds it, and the other end extends towards the other end of the mounting portion 41 and exceeds it. And a limiting block 472 is provided on the distal side of the extension portion 471, and a pressing portion 473 is formed on the side away from the movable handle 22; the limiting block 472 converges towards the screw rod 23 and meshes with the screw rod 23 when the elastic claw 47 is not subjected to an external force; thus, in the case where the mounting portion 41 is provided with a circumferential limiting member block, the limiting block 472 cannot rotate circumferentially, forming an axial limit on the mounting portion 41. In this way, when the mounting portion 41 forms a locking connection with the second limiting member 226 of the movable handle 22 through the first limiting member 42, the mounting portion 41 can make the movable handle 22 immovable both circumferentially and axially. When it is necessary to release the locking connection, by pressing the pressing portion 473, the limiting block 472 is disengaged from the external thread of the screw rod 23, and then the locking component 4 can be axially disengaged.

[0063] The above specific embodiments are only partial embodiments of the present invention and do not limit the present invention. This specification cannot enumerate all embodiments of the inventive concept of the present invention, and some features of the above different embodiments can be mutually replaced or combined. Those skilled in the art can also make simple replacements according to actual needs. The inventive concept of the present invention is subject to the scope of protection required.

Claims

1. A conveyor, characterized in that, It includes a sheath-core assembly and a delivery handle. The sheath-core assembly includes a sheath tube and a sheath tube connector connected to the proximal end of the sheath tube. The delivery handle includes a fixed handle and a movable handle. A screw rod is connected to the proximal side of the fixed handle. The movable handle is sleeved on the screw rod. The sheath tube connector is arranged inside the screw rod and passes through the side wall of the screw rod to be connected to the movable handle. The movable handle includes a movable state of rotating or dragging relative to the screw rod to adjust the axial position. The delivery handle further includes a locking assembly, which is used to establish a locking connection with the movable handle and restrict the movable state of the movable handle after connection.

2. The conveyor according to claim 1, wherein The movable handle includes a housing, a tooth block, and a switching device connected to the tooth block. Spaced grooves extending along the axial length are respectively formed on two opposite side walls of the screw rod. Two sides in the radial direction of the sheath tube connector respectively extend out from the spaced grooves. The switching device is used to control the switching of the tooth block between meshing with and disengaging from the outer wall of the screw rod.

3. The conveyor according to claim 2, wherein, The locking assembly includes a mounting portion coaxially arranged with the screw rod. The mounting portion is at least fixed relative to the screw rod in the circumferential direction. The mounting portion is provided with a first limiting member, and a second limiting member is arranged at one end of the housing axially opposite to the mounting portion. When the first limiting member and the second limiting member are in the same axial position, they can be fixedly connected.

4. The conveyor according to claim 3, wherein, The mounting portion is slidably sleeved on the screw rod. At least two circumferential limiting blocks are arranged on the inner wall of the mounting portion. The circumferential limiting blocks respectively pass through the spaced grooves and extend into the inner cavity of the screw rod.

5. The conveyor according to claim 4, characterized in that, The first limiting member is arranged at one end of the mounting portion opposite to the housing. The first limiting member includes a plurality of first card slots arranged in the circumferential direction. A sliding groove is formed on the outer side wall of the housing close to the mounting portion. The sliding groove has an axial length. The second limiting member includes a sliding block. The sliding block is provided with a clamping block extending inwards towards the housing. The sliding block is arranged in the sliding groove and can slide axially along the sliding groove. When the sliding block slides to the side close to the mounting portion, the clamping block can be clamped in any one of the first card slots.

6. The conveyor according to claim 4, characterized in that The second limiting member is provided with a plurality of card holes along the circumferential direction of the outer side wall of the housing close to the mounting portion. The first limiting member is arranged on the outer side wall of the mounting portion close to the housing. The first limiting member includes an insertion portion and a movable portion. One end of the movable portion is movably connected to the mounting portion, and the other end is connected to the insertion portion. The movable portion can control the insertion portion to approach or move away from the housing. When the insertion portion approaches the housing, the insertion portion can be inserted into any one of the card holes.

7. The conveyor according to claim 5 or 6, characterized in that, One end of the housing axially provided with the second limiting member is rotatably connected to the mounting portion in the circumferential direction.

8. The conveyor according to claim 4, wherein, The second limiting member is provided with a plurality of second card slots along the circumferential direction of the end of the housing close to the mounting portion. The first limiting member is provided with a clamping post on the outer side wall of the mounting portion. When the mounting portion and the second card slots are in the same axial position, the clamping post can be inserted into any one of the second card slots.

9. The conveyor according to claim 8, characterized in that, The outer wall of the installation part is provided with a plurality of elastic claws. The elastic claws include an extension part extending along a direction parallel to the longitudinal axis of the housing. A limiting block is arranged on the distal side of the extension part. The limiting block converges towards the screw rod direction and meshes with the screw rod when the elastic claws are in a state without external force.

10. The conveyor according to claim 1, characterized in that, A rear release assembly is connected to the proximal end of the screw rod. The sheath core assembly further includes an inner sheath core disposed within the sheath tube. The rear release assembly includes a clamping part and a screw cap. A gripper is inserted into the clamping part, and the outer wall is in threaded cooperation with the inner wall of the screw cap. The screw cap is provided with an inwardly protruding pressing part. The inner sheath core simultaneously passes through the clamping part, the screw cap, and the gripper. The pressing part moves axially along with the rotation of the screw cap to press against or away from the gripper, so that the gripper clamps or releases the inner sheath core.

11. The conveyor according to claim 10, wherein, The inner cavity of the clamping part is provided with a plug-in groove having a non-circular radial cross-section. The plug-in part of the gripper inserted into the plug-in groove has the same non-circular radial cross-section.

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