Conveyor and conveying system

Abstract

The utility model relates to a conveyor and a conveying system, which are used for conveying medical instruments. The outer sheath assembly is arranged outside the core tube assembly in a sleeving mode, and a first containing part is defined between the far end of the outer sheath assembly and the core tube assembly in the circumferential direction; the first driving assembly is connected with the outer sheath assembly; the first driving assembly comprises a first elastic piece, and the first elastic piece is connected with the outer sheath assembly in a compressed state and used for driving the outer sheath assembly to move towards the near end relative to the core tube assembly so as to release the near end of the medical instrument; at least part of the buffering part is indirectly and fixedly connected with the core tube assembly or directly and fixedly connected with the core tube assembly, when the outer sheath assembly moves towards the near end, the buffering part has a buffering effect on the outer sheath assembly, and the buffering part improves the stability of the conveyor when the conveyor releases medical instruments; and the adverse effect of the impact force of the conveyor on the patient can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of interventional medical instrument equipment, especially relates to a conveyor and conveying system. BACKGROUND

[0002] Heart valve refers to the valve between atrium and ventricle or ventricle and artery, which includes bicuspid valve (between left ventricle and left atrium), tricuspid valve (between right ventricle and right atrium), pulmonary valve (at right ventricular outlet) and aortic valve (at left ventricular outlet).

[0003] At present, the treatment method of heart valve dysfunction mainly has two kinds. Taking aortic valve as an example, it can be divided into surgical direct vision valve replacement and transcatheter aortic valve replacement. Among them, surgical replacement needs to be carried out under extracorporeal circulation, the aorta of the patient is incised, the aortic valve of the patient is removed and then the artificial valve is implanted, and after implantation, the valve is sutured to the aortic annulus, and finally the circulation is stopped and the chest is closed to end the operation. Transcatheter replacement is to install the valve in the crimped state at the end of the catheter to reach the implantation site under the radiation environment, and then expand to its functional size to replace the diseased heart valve.

[0004] But no matter which method, there are some practical problems, for example, the extracorporeal circulation time of surgical operation is long, and the surgical risk is big. Transcatheter replacement is a non-direct vision surgery, and the prosthesis valve cannot be directly and quickly positioned to the treatment site. UTILITY MODEL CONTENT

[0005] In view of the above problems, the utility model aims at providing a conveyor capable of being quickly operated and being stable and accurate in release.

[0006] The purpose is realized by the following technical scheme:

[0007] According to the first aspect technical scheme of the utility model, a conveyor is provided for conveying medical instruments, and the conveyor comprises:

[0008] A core tube assembly;

[0009] An outer sheath assembly is sleeved outside the core tube assembly, and a first containing portion is defined between the distal end of the outer sheath assembly and the core tube assembly in the circumferential direction.

[0010] A first driving assembly is connected with the outer sheath assembly, and the first driving assembly comprises a first elastic member, the first elastic member is connected with the outer sheath assembly in a compressed state, and it is used to drive the outer sheath assembly to move towards the proximal end relative to the core tube assembly to release the proximal end of the medical instrument.

[0011] A buffer member is fixedly connected with the core tube assembly indirectly or directly, and the buffer member buffers the outer sheath assembly when the outer sheath assembly moves towards the proximal end.

[0012] Further, the delivery device further comprises a guide member, the proximal end of the core tube assembly is fixedly connected with the guide member; the buffer member is sleeved outside the guide member, and the buffer member comprises silica gel or rubber.

[0013] Further, the buffer member comprises a columnar buffer body, the buffer body comprises an assembly hole penetrating in the axial direction, and the assembly hole is used for accommodating the guide member; the buffer body further comprises a plurality of grooves recessed inward from the outer circumferential surface of the buffer body and extending along the circumferential direction of the buffer body.

[0014] Further, the buffer member comprises a spring.

[0015] Further, the buffer member comprises a first magnetic element and a second magnetic element, the first magnetic element is arranged at the proximal end of the outer sheath assembly, and the second magnetic element is arranged on the guide member.

[0016] The first magnetic element and the second magnetic element repel each other.

[0017] Further, the first driving assembly further comprises a control member, the control member is matched with the proximal end stop of the outer sheath assembly, so that the control member can be switched between a first position and a second position.

[0018] In the first position, the proximal end of the outer sheath assembly abuts against the control member, and the first elastic member is in a compressed state to apply an elastic force towards the proximal side to the outer sheath assembly.

[0019] In the second position, the proximal end of the outer sheath assembly is separated from the control member, and the first elastic member is stretched and drives the outer sheath assembly to move towards the proximal end.

[0020] Further, the outer sheath assembly comprises:

[0021] The matching member comprises a first stepped structure, a second stepped structure and a third stepped structure arranged in sequence from the distal end to the proximal end and decreasing in diameter, a distal end surface of the first stepped structure forms a first stop, and a convex structure of the outer circumferential surface of the proximal end of the third stepped structure forms a second stop.

[0022] An outer sheath tube, the proximal end of the outer sheath tube penetrates into the matching member from the distal end of the matching member and is fixedly connected with the matching member.

[0023] The proximal end of the first elastic member in the compressed state abuts against the first stopper;

[0024] The control member is in stopper cooperation with the second stopper.

[0025] Further, the proximal end of the conveyor comprises a handle assembly, the first driving assembly is arranged in the handle assembly, the handle assembly comprises a shell, the inner wall of the shell is provided with a first convex rib extending in the circumferential direction, the first convex rib is located at the distal end of the control member, the fitting member passes through the first convex rib and can move in the axial direction relative to the first convex rib, and the buffer member is arranged at the distal end face of the first convex rib and / or the proximal end face of the second stepped structure.

[0026] Further, the control member is provided with a first guide hole, the proximal end of the outer sheath assembly can pass through the first guide hole in the axial direction, the inner wall of the first guide hole is provided with a boss, and the boss is in stopper cooperation with the proximal end of the outer sheath assembly.

[0027] The control member is further provided with a second elastic member, the second elastic member is in a compressed state, drives the control member to move in the vertical axial direction, and makes the proximal end of the outer sheath assembly abut against the boss.

[0028] The conveyor of the utility model, through the first elastic member of the first driving assembly drives the outer sheath assembly to move towards the proximal end fast, can reduce the time required by the present surgical operation, and the buffer member can generate the buffering effect to the outer sheath assembly, improves the stability of the conveyor when releasing the medical instrument, and can avoid the impact force of the conveyor to the patient.

[0029] According to the second aspect technical scheme of the utility model, a conveying system is further provided, which comprises the conveyor in the first aspect technical scheme, and a medical instrument, wherein the proximal end of the medical instrument is accommodated in the first accommodating portion. BRIEF DESCRIPTION OF DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present utility model. Moreover, the same reference numerals in the accompanying drawings designate the same elements throughout. In the drawings:

[0031] Figure 1 The structure schematic view of the conveyor according to the embodiment 1 of the utility model is schematically shown;

[0032] Figure 2 The structure schematic view of the conveyor according to the embodiment 1 of the utility model is schematically shown; Figure 1 The cross-sectional structure schematic view of the A-A portion in the figure is schematically shown;

[0033] Figure 3 Fig. 1 schematically shows an exploded view of a conveyor according to an embodiment of the present application;

[0034] Figure 4 Fig. 2 schematically shows a partial cross-sectional view of the conveyor in a locked state according to an embodiment of the present application;

[0035] Figure 5 Fig. 3 schematically shows a partial cross-sectional view of the conveyor in an unlocked state according to an embodiment of the present application;

[0036] Figure 6 Fig. 4 schematically shows a structure of a buffer according to other embodiments of the present application.

[0037] Figure 7 Fig. 5 schematically shows a structure of a control member according to an embodiment of the present application;

[0038] Figure 8 Fig. 6 schematically shows a structure of a cooperating member according to an embodiment of the present application;

[0039] Figure 9 Fig. 7 schematically shows a partial cross-sectional view of a conveyor according to an embodiment 2 of the present application;

[0040] Figure 10 Fig. 8 schematically shows a partial cross-sectional view of a conveyor according to an embodiment 3 of the present application;

[0041] Figure 11 Fig. 9 schematically shows a partial cross-sectional view of a conveyor according to an embodiment 4 of the present application. DETAILED DESCRIPTION

[0042] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0043] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of 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 groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0044] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.

[0045] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Such spatially relative terms can encompass different orientations of the device in use or operation, depending on the particular context in which it is used. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0046] It is noted that the terms "distal" and "proximal" are used as orientation terms that are commonly used in the field of interventional medical devices, where "distal" refers to the end of the device that is farthest from the operator during a procedure, and "proximal" refers to the end of the device that is closest to the operator during a procedure. Axial refers to a direction parallel to a line connecting a center of a distal end of the medical device and a center of a proximal end of the medical device; radial refers to a direction perpendicular to the axial direction.

[0047] Embodiment 1

[0048] As Figure 1 shown, according to the embodiment of the utility model, a kind of conveyor 100 is proposed, which is used to convey medical instrument.The medical instrument can be valve, blood vessel stent, occluder etc.In this embodiment, valve 2001 is taken as an example.

[0049] As Figure 2 shown, the conveyor 100 includes handle assembly 10, outer sheath assembly 20, core tube assembly 30, containing head 40 and inner rod 50.Handle assembly 10 has containing cavity 101, the proximal end of the outer sheath assembly 20, the proximal end of core tube assembly 30 and the proximal end of inner rod 50 are contained in the containing cavity 101.

[0050] Specifically, the proximal end of core tube assembly 30 is connected with handle assembly 10, outer sheath assembly 20 is sleeved on core tube assembly 30, and first receiving part 201 is defined between the distal end of outer sheath assembly 20 and core tube assembly 30 along the circumferential direction, inner rod 50 is arranged inside core tube assembly 30, the distal end of inner rod 50 passes through the distal end of core tube assembly 30, containing head 40 is connected to the distal end of inner rod 50, containing head 40 is arranged axially spaced apart from core tube assembly 30, the distal end of containing head 40 is provided with second receiving part 401, the proximal end of valve 2001 is received in first receiving part 201, and the distal end of valve 2001 is received in second receiving part 401. Among them, in other embodiments, handle assembly 10 can not be provided, by manually fixing the proximal end of outer sheath assembly 20, the proximal end of core tube assembly 30 and the proximal end of inner rod 50, so as to manually control the positional relationship of outer sheath assembly 20, core tube assembly 30 and inner rod 50, the accommodation and release of valve 2001 can also be realized.

[0051] The delivery device 100 further comprises a first driving assembly 60 and a second driving assembly 70. The first driving assembly 60 is arranged in the accommodating cavity 101 and connected with the sheath assembly 20, and the first driving assembly 60 is capable of driving the sheath assembly 20 to move towards the proximal end relative to the core tube assembly 30 to release the proximal end of the valve. The second driving assembly 70 is movably arranged in the handle assembly 10 and connected with the proximal end of the inner rod 50, and the second driving assembly 70 is capable of driving the inner rod 50 to move axially relative to the core tube assembly 30 to push the accommodating head 40 away from the core tube assembly 30 to release the distal end of the valve. It can be understood that the delivery device can comprise one of the first driving assembly 60 or the second driving assembly 70, when the delivery device only comprises the first driving assembly 60 for releasing the proximal end of the valve, and the proximal end of the inner rod 50 is manually controlled to drive the inner rod 50 to move axially relative to the core tube assembly 30 to release the distal end of the valve; when the delivery device only comprises the second driving assembly 70 for releasing the distal end of the valve, and the proximal end of the sheath assembly 20 is manually controlled to drive the sheath assembly 20 to move towards the proximal end relative to the core tube assembly 30 to release the proximal end of the valve.

[0052] As shown in Figure 3 , the first driving assembly 60 comprises a first elastic member 61 and a control member 62, one end of the first elastic member 61 is connected with the sheath assembly 20, the other end of the first elastic member 61 is connected with the handle assembly 10, and the control member 62 is movably arranged in the accommodating cavity 101 and stopper-fitted with the proximal end of the sheath assembly 20, so that the control member 62 is capable of being switched between a first position and a second position. When the control member 62 is in the first position (as shown in Figure 4 ), the proximal end of the sheath assembly 20 abuts against the control member 62, and the first elastic member 61 is in a compressed state to apply an elastic force towards the proximal end side to the fitting member 22 of the sheath assembly 20, the control member 62 is used to block the sheath assembly 20 from moving towards the proximal end, and the proximal end of the sheath assembly 20 is pushed against the control member 62 by the elastic driving force of the first elastic member 61 to keep the sheath assembly 20 in a fixed state relative to the handle assembly 10 and the core tube assembly 30, at this time, the sheath assembly 20 is in a third position. When the control member 62 is in the second position (as shown in Figure 5 ), the proximal end of the sheath assembly 20 is separated from the control member 62, the first elastic member 61 is stretched and drives the sheath assembly 20 to move towards the proximal end relative to the handle assembly 10 to make the sheath assembly 20 move from the third position to a fourth position, thereby releasing the proximal end of the valve. In the embodiment, only the control member 62 needs to be moved from the first position to the second position to drive the sheath assembly 20 to move by the elastic force of the first elastic member 61, so that the releasing operation process of the valve is simple and fast.

[0053] As shown in Figure 2As shown, the conveyor 100 further includes a buffer 90, which is at least partially fixedly connected to the core tube assembly 30 or directly fixedly connected. When the outer sheath assembly 20 moves toward the proximal end, the buffer 90 produces a buffering effect on the outer sheath assembly 20. In this embodiment, the core tube assembly 30 is indirectly fixedly connected to the buffer 90. Specifically, the conveyor 100 further includes a guide member 80, which is arranged in the accommodating cavity 101 and is arranged near the proximal end of the accommodating cavity 101. The guide member 80 is fixedly connected to the handle assembly 10. The guide member 80 is a tubular structure as a whole, so that the inner rod 50 can pass through the guide member 80 and be connected to the second drive assembly 70. The proximal end of the core tube assembly 30 is fixedly connected to the guide member 80. The buffer 90 is at least partially fixedly connected to the guide member 80, as shown in FIG. Figure 5 As shown, when the outer sheath assembly 20 moves toward the proximal end, the buffer member 90 produces a buffering effect on the outer sheath assembly 20.

[0054] like Figure 2 As shown, in the present embodiment, the buffer member 90 is sleeved outside the guide member 80, and the buffer member 90 includes silicone or rubber. When the outer sheath assembly 20 moves rapidly toward the proximal end under the drive of the first elastic member 61, the proximal end of the outer sheath assembly 20 first contacts the buffer member 90, and the buffer member 90 has good elasticity, produces a buffering effect on the outer sheath assembly 20, and avoids the outer sheath assembly 20 from rigidly colliding with the guide member 80. The conveyor 100 of the present invention drives the outer sheath assembly 20 to move rapidly toward the proximal end by the first elastic member 61 of the first driving assembly 60, which can reduce the time required for current surgical operations, and the buffer 90 can produce a buffering effect on the outer sheath assembly 20, improve the stability of the conveyor 100 when releasing medical equipment, and can avoid the impact force of the conveyor 100 from having an adverse effect on the patient. In other embodiments, the buffer is sleeved outside the core tube assembly (ie, the buffer is directly connected to the core tube assembly), and when the outer sheath assembly moves toward the proximal end, the outer sheath assembly first abuts against the buffer.

[0055] In other embodiments, Figure 6 As shown, the buffer member 90a includes a columnar buffer body 910a, which includes an axially extending assembly hole 911a for accommodating the guide member 80. The buffer body 910a also includes a plurality of grooves 912a, which are recessed inward from the outer circumference of the buffer body 910a and extend along the circumference of the buffer body 910a. The addition of the grooves 912a can further improve the softness of the 912a, thereby minimizing the rigid collision between the outer sheath assembly 20 and the guide member 80.

[0056] In the embodiment, during the installation of the valve, first, the proximal end of the valve is compressed, the proximal end of the valve is fixed on the outer circumferential surface of the distal end of the core tube assembly 30, then the outer sheath assembly 20 is moved from the fourth position to the third position to jointly clamp and fix the proximal end of the valve by the outer sheath assembly 20 and the core tube assembly 30, so that the proximal end of the valve is in the first receiving portion 201; then the accommodation head 40 is installed on the distal end of the inner rod 50, and the inner rod 50 is driven by the second driving assembly 70 to move towards the proximal end side to pull the accommodation head 40 to be close to the core tube assembly 30, so that the distal end of the compressed valve is stretched into the second receiving portion 401, and the installation of the valve is completed. Alternatively, in other embodiments, the distal end of the valve can be first installed into the second receiving portion 401, and then the proximal end of the valve is installed into the first receiving portion 201.

[0057] It should be noted that, during the release of the valve, the outer sheath assembly 20 is driven to move by operating the first driving assembly 60 to release the proximal end of the valve, and the accommodation head 40 is driven to move by operating the second driving assembly 70 to release the distal end of the valve. Therefore, the delivery device 100 provided in the embodiment can sequentially release the distal end and the proximal end of the valve by operating the second driving assembly 70 and the first driving assembly 60, that is, the distal end of the valve is released by operating the second driving assembly 70 first, and then the proximal end of the valve is released by operating the first driving assembly 60, so that when the distal end of the valve is released, if there is a large deviation in the deployment position of the valve, the valve in the half-deployed state (i.e., the state that the distal end of the valve is deployed, and the proximal end of the valve is bunched in the first receiving portion 201) can still be pulled or pushed by the core tube assembly 30 and the outer sheath assembly 20 to adjust the position of the valve, and when the valve reaches the ideal position, the proximal end of the valve is finally released, so that the position accuracy of the released valve is more accurate, and the quality of the operation is improved.

[0058] In an exemplary embodiment, please refer to Figure 2 and Figure 7 The control member 62 includes a main body portion 621 and a pressing portion 622 connected to each other, the main body portion 621 is movably arranged in the accommodation cavity 101, and the pressing portion 622 is arranged outside the accommodation cavity 101 by penetrating the handle assembly 10 away from the main body portion 621. Therefore, during the release of the valve, the proximal end of the valve can be released by only pressing the pressing portion 622 outside the accommodation cavity 101 to move the main body portion 621 from the first position to the second position, which is simple and fast in operation, and is beneficial to shorten the operation time and reduce the operation risk.

[0059] In the embodiment, please refer to Figure 3 and Figure 7As shown, the first driving assembly 60 further comprises a second elastic member 63. At least one first spring sleeve connecting column 623 is arranged on the main body part 621, and a second spring sleeve connecting column (not shown in the figure) is arranged on the inner wall of the handle assembly 10 opposite to the first spring sleeve connecting column 623. The two second elastic members 63 are respectively sleeved on the first spring sleeve connecting column 623 and the second spring sleeve connecting column 624, and the two ends of the second elastic member 63 are respectively abutted against the main body part 621 and the inner wall of the handle assembly 10, and the elastic driving force of the second elastic member 63 in the compressed state pushes the main body part 621 to abut against the inner wall of the handle assembly 10, so that the control member 62 can be kept at the first position (as shown in Figure 4 When the pressing part 622 is pressed, the control member 62 moves to the second position (as shown in Figure 5 In this embodiment, during the process of releasing the valve, only the pressing part 622 outside the accommodation cavity 101 needs to be pressed to move the main body part 621 from the first position to the second position to release the proximal end of the valve, which is simple and fast, and is beneficial to shorten the operation time and reduce the operation risk.

[0060] In other embodiments, the first clamping structure (not shown in the figure) and the second clamping structure (not shown in the figure) are arranged at intervals on the inner wall of the handle assembly 10, and the main body part 621 is arranged on the third clamping structure (not shown in the figure). The third clamping structure can be clamped with the first clamping structure and the second clamping structure respectively. When the third clamping structure is clamped with the first clamping structure, the control member 62 is at the first position, and when the third clamping structure is clamped with the second clamping structure, the control member 62 is at the second position. The first clamping structure and the second clamping structure can be clamping grooves, and the third clamping structure is a clamping buckle matched with the clamping grooves. Through the clamping form, the control member 62 is in the clamping state at the first position and the second position, so that the control member 62 is in a relatively firm locking state at the first position and the second position, thereby reducing the probability of loosening the valve due to accidental touch of the control member 62 during the valve implantation process.

[0061] Further, as shown in Figure 3 The outer sheath assembly 20 comprises an outer sheath tube 21 and a matching member 22. Specifically, the outer sheath tube 21 is sleeved outside the core tube assembly 30, and the proximal end of the outer sheath tube 21 is movably arranged in the accommodation cavity 101. The matching member 22 is arranged in the accommodation cavity 101 and sleeved outside the outer sheath tube 21 and located at the proximal end of the outer sheath tube 21, in combination with Figure 3 and Figure 8As shown, the fitting piece 22 includes a first stop portion 2211 at the distal end and a second stop portion 224 at the proximal end. The first elastic member 61 is sleeved outside the outer sheath 21, and the distal end of the first elastic member 61 abuts against the protruding structure 110 on the inner wall of the handle assembly 10, and the proximal end of the first elastic member 61 in the compressed state abuts against the first stop portion 2211, and the main body portion 621 of the control member 62 abuts against the second stop portion 224. In other embodiments, the fitting piece can not be provided, and the first stop portion and the second stop portion can be directly provided at the proximal end of the outer sheath 21.

[0062] The first elastic member 61 can be a spiral spring, and can also be a spring sheet or the like. In the embodiment, the fitting piece 22 is in abutting cooperation with the first elastic member 61 and the control member 62 respectively, and the first elastic member 61 is used as the driving force for the movement of the outer sheath 21, so that the overall structure of the delivery device 100 is compact, the production cost is reduced, the operation is simple, the surgical operation procedure is simplified, and the operation time is shortened. In other embodiments, the distal end of the first elastic member 61 can abut against the inner wall of the handle assembly 10.

[0063] In an exemplary embodiment, as shown in Figure 8 The fitting piece 22 is tubular as a whole, and includes a first stepped structure 221, a second stepped structure 222 and a third stepped structure 223 which are sequentially arranged from the distal end to the proximal end and have diameters decreasing in sequence. The proximal end of the outer sheath 21 is inserted into the second stepped structure 222 and fixedly connected with the second stepped structure 222. The distal end face of the first stepped structure 221 forms the first stop portion 2211 which protrudes from the outer wall of the outer sheath 21, so that the proximal end of the first elastic member 61 abuts against the first stop portion 2211. The second stop portion 224 is a protruding structure provided on the outer periphery of the proximal end of the third stepped structure 223. In other embodiments, the proximal end of the outer sheath 21 can be directly connected and fixed with the distal end of the fitting piece 22.

[0064] As shown in Figure 4 , Figure 5 and Figure 8 , the inner wall of the handle assembly 10 is provided with a first protruding rib 121 extending in the circumferential direction, and the first protruding rib 121 is located at the distal end of the control member 62. The fitting piece 22 passes through the first protruding rib 121 and can move in the axial direction relative to the first protruding rib 121. When the fitting piece 22 moves towards the proximal end, the proximal end of the fitting piece 22 abuts against the buffer 90. When the fitting piece 22 moves towards the distal end, the second stop portion 224 abuts against the proximal end of the first protruding rib 121. The first protruding rib 121 and the buffer 90 are used to limit the movement range of the outer sheath assembly 20, so as to accurately control the movement range of the outer sheath 21, and make the release process of the valve more accurate.

[0065] Further, in the embodiment, as shown in Figure 7 and Figure 8 As shown in Figure 4 As shown in Figure 5 As shown in

[0066] In the present embodiment, please refer to Figure 2 and Figure 3 As shown in

[0067] In the present embodiment, please refer to Figure 3As shown, the core tube assembly 30 comprises a core tube 31 and a fixing member 32, the proximal end of the core tube 31 is connected with the handle assembly 10, specifically, the proximal end of the core tube 31 is inserted into the guide member 80 and fixedly connected with the guide member 80. The fixing member 32 is sleeved outside the core tube 31 and located at the distal end of the core tube 31, and a first receiving part 201 is defined between the fixing member 32 and the distal end of the outer sheath tube 21 in the circumferential direction, and the fixing member 32 is provided with a plurality of tooth-shaped protrusions which are sequentially and spaced apart in the circumferential direction of the fixing member 32, the tooth-shaped protrusions are used for hooking with the proximal end support of the valve, so as to prevent the proximal end of the valve from being loosened from the first receiving part 201 after the distal end of the valve is released, and facilitate the position of the valve to be continuously adjusted by pulling or pushing the outer sheath assembly 20 and the core tube assembly 30 after the distal end of the valve is released, so as to improve the accuracy of the valve delivery.

[0068] According to the embodiments of the present application, a delivery system is also provided, which comprises a medical device 2001 (for example, a valve) and a delivery device 100, the proximal end of the medical device is received in the first receiving part, and the distal end of the medical device is received in the second receiving part. The delivery system provided by the present application has the same technical effects as the delivery device, which will not be described here.

[0069] Embodiment 2

[0070] The delivery device 200 of the present embodiment has basically the same structure as the delivery device 100 of embodiment 1, as shown in the accompanying drawings, Figure 9 The main difference between the present embodiment and the previous embodiment is that the buffer member 290 in the present embodiment comprises a spring. The guide member 280 of the delivery device 200 has an annular protruding part 281, the distal end of the buffer member 290 abuts against the proximal end of the outer sheath assembly 220, and the proximal end of the buffer member 290 abuts against the distal end of the annular protruding part 281. When the outer sheath assembly 220 of the delivery device 200 is proximally moved under the action of an external force, the presence of the buffer member 290 can avoid the rigid collision between the outer sheath assembly 220 and the guide member 280, thereby improving the stability of the delivery device 200.

[0071] Embodiment 3

[0072] The delivery device 300 of the present embodiment has basically the same structure as the delivery device 100 of embodiment 1, as shown in the accompanying drawings, Figure 10As shown, the main difference is that the buffer 390 in the embodiment comprises a first magnetic element 391 and a second magnetic element 392, the first magnetic element 391 is arranged at the proximal end of the sheath assembly 320 of the conveyor 300, and the second magnetic element 392 is arranged on the guide 380 of the conveyor 300. The first magnetic element 391 and the second magnetic element 392 repel each other magnetically. When the sheath assembly 320 of the conveyor 300 is proximally moved under the action of an external force, the presence of the first magnetic element 391 and the second magnetic element 392 can avoid the rigid collision between the sheath assembly 320 and the guide 380, thereby improving the stability of the conveyor 300.

[0073] Embodiment 4

[0074] The conveyor 400 of the embodiment is basically the same as the conveyor 100 of Embodiment 1 in structure, and the main difference is the position of the buffer 490 in the conveyor 400. As shown, Figure 11 In the embodiment, the buffer 490 is arranged on the distal end surface of the first protruding rib 4121 and / or the proximal end surface of the second stepped structure 4222 on the matching member 422 (the schematic diagram of the buffer on the matching member is not shown), when the sheath assembly 420 is rapidly moved proximally under the driving of the first elastic member 461, the buffer 490 arranged between the first protruding rib 4121 and the matching member 422 can have a buffering effect on the sheath assembly 420, and also can serve as a limiting structure for the proximal movement of the sheath assembly 420.

[0075] It can be understood that the specific structure of the buffer 490 can adopt the structure of any one of the buffers in Embodiments 1 to 3.

[0076] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A conveyor for conveying a medical instrument, characterized by, The delivery device comprises: a core tube assembly; an outer sheath assembly sleeved on the core tube assembly, and defining a first receiving portion between a distal end of the outer sheath assembly and the core tube assembly in a circumferential direction; a first driving assembly connected to the outer sheath assembly, the first driving assembly comprising a first elastic member in a compressed state connected to the outer sheath assembly, and configured to drive the outer sheath assembly to move towards a proximal end relative to the core tube assembly to release a proximal end of the medical device; a buffer member at least partially fixedly connected to the core tube assembly indirectly or directly, the buffer member configured to provide a buffering effect on the outer sheath assembly when the outer sheath assembly moves towards the proximal end.

2. The conveyor of claim 1, wherein, The delivery device further comprises: a guide member, a proximal end of the core tube assembly fixedly connected to the guide member; the buffer member sleeved on the guide member and / or arranged at a proximal end of the outer sheath assembly, the buffer member comprising silicone or rubber.

3. The delivery device according to claim 2, wherein: the buffer member comprises a columnar buffer body, the buffer body comprising an assembly hole axially penetrating through the buffer body, the assembly hole configured to accommodate the guide member; and the buffer body further comprising a plurality of grooves recessed inward from an outer circumferential surface of the buffer body and extending along a circumferential direction of the buffer body.

4. The delivery device according to claim 1, wherein: the buffer member comprises a spring.

5. The delivery device according to claim 1, wherein: the delivery device further comprises a guide member, a proximal end of the core tube assembly fixedly connected to the guide member; the buffer member comprises a first magnetic element and a second magnetic element, the first magnetic element arranged at a proximal end of the outer sheath assembly, and the second magnetic element arranged on the guide member; the first magnetic element and the second magnetic element repel each other magnetically.

6. The conveyor of claim 1, wherein, The first driving assembly further comprises: a control member configured to cooperate with a proximal end of the outer sheath assembly, so that the control member is switchable between a first position and a second position; in the first position, the proximal end of the outer sheath assembly abuts against the control member, and the first elastic member is in a compressed state to apply an elastic force to the outer sheath assembly towards the proximal end; in the second position, the proximal end of the outer sheath assembly is separated from the control member, and the first elastic member is stretched to drive the outer sheath assembly to move towards the proximal end.

7. The conveyor of claim 6, wherein, The outer sheath assembly comprises: a fitting member, the fitting member comprising a first stepped structure, a second stepped structure and a third stepped structure arranged sequentially from a distal end to a proximal end and decreasing in diameter, a distal end surface of the first stepped structure forming a first stop portion, and a convex structure of an outer circumferential surface of a proximal end of the third stepped structure forming a second stop portion; an outer sheath tube, a proximal end of the outer sheath tube penetrating into the fitting member from the distal end of the fitting member and fixedly connected to the fitting member; wherein a proximal end of the first elastic member in a compressed state abuts against the first stop portion; the control member cooperates with the second stop portion.

8. The delivery device according to claim 7, wherein: The proximal end of the delivery device comprises a handle assembly, the first driving assembly is arranged in the handle assembly, the handle assembly comprises a housing, an inner wall of the housing is provided with a first protruding rib extending in the circumferential direction, the first protruding rib is located at the distal end of the control member, the matching member passes through the first protruding rib and can move in the axial direction relative to the first protruding rib, the buffer is arranged on the distal end face of the first protruding rib and / or the proximal end face of the second stepped structure.

9. The delivery device according to claim 6, characterized in that: The control member is provided with a first guide hole, the proximal end of the outer sheath assembly can pass through the first guide hole in the axial direction, an inner wall of the first guide hole is provided with a boss, the boss is in abutting engagement with the proximal end of the outer sheath assembly; The control member is further provided with a second elastic member, the second elastic member is in a compressed state, drives the control member to move in the vertical axial direction, and makes the proximal end of the outer sheath assembly abut against the boss.

10. A delivery system characterized by, The delivery device comprises: The delivery device according to any one of claims 1-9; The medical instrument, a proximal end of the medical instrument is accommodated in the first accommodation portion.

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