Conveyor and conveying system

Abstract

The invention relates to a conveyor and a conveying system.The conveyor comprises a sheath tube assembly, a handle mechanism, a first matching part and a second matching part, the handle mechanism comprises a handle shell, the sheath tube assembly comprises an outer sheath tube, the outer sheath tube is slidably connected with the handle shell, the first matching part is arranged on the outer sheath tube, and the second matching part is arranged on the handle shell; the implant is contained in a tube cavity of the outer sheath tube in a releasable mode in a compressed state and is bound by the outer sheath tube in the radial direction, the outer sheath tube axially slides towards the near end relative to the handle shell so that radial binding to the implant can be removed, and in the process that the outer sheath tube axially slides towards the near end relative to the handle shell so that radial binding can be removed. The first matching part is driven to be in contact with the second matching part, so that the second matching part blocks the movement of the outer sheath tube, but the first matching part can stride over the second matching part to enable the outer sheath tube to continuously and axially slide towards the near end. The controllability of the conveyor is good, and the situation that the position cannot be adjusted due to excessive release of the implant can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a delivery device and a delivery system. Background Art

[0002] What is provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] Interventional therapy is a new treatment method different from surgical therapy and medical therapy. Interventional therapy includes endovascular intervention and non-vascular intervention therapy. Briefly speaking, interventional therapy is to make a tiny channel with a diameter of about a few millimeters on the skin without exposing the lesion by surgery, and under the guidance of imaging equipment (angiography machine, fluoroscope, CT, MR, B-ultrasound), deliver the treatment device to the target site through the original body cavity of the human body. Due to advantages such as small trauma and quick recovery, interventional therapy is accepted by more and more doctors and patients.

[0004] One way of interventional therapy is to deliver a treatment device (implant) to the target site through a delivery device and implant the treatment device into the target site. For example, deliver a covered stent to a blood vessel to treat an aneurysm or an aortic dissection. Generally, the delivery device includes a sheath, and the sheath is used to load the implant. The sheath carrying the implant punctures into the patient's body cavity (such as a blood vessel), is pushed along the body cavity to the lesion site, and then the implant is released to the lesion site by withdrawing the sheath.

[0005] However, in this release method, when withdrawing the sheath, if the speed is too fast, the sheath may drive the implant to move, resulting in inaccurate release position. In order to improve the positioning accuracy of the implant, it is usually desired to adjust the position of the implant after finding that the position of the implant does not meet the expectation. However, when too much of the implant is released, the implant adheres to the release site, making it difficult or impossible to adjust the position of the implant.

[0006] The controllability of the existing delivery device is insufficient, which easily leads to excessive release of the implant and inability to adjust the position. Summary of the Invention

[0007] Based on this, it is necessary to provide a delivery device with better controllability to avoid excessive release of the implant and inability to adjust the position.

[0008] A transporter for transporting an implant, the transporter comprising a sheath assembly, a handle mechanism, a first engaging member and a second engaging member, the handle mechanism comprising a handle housing, the sheath assembly comprising an outer sheath, the outer sheath being slidably connected to the handle housing, the first engaging member being disposed on the outer sheath, the second engaging member being disposed on the handle housing, the implant being releasably received in a compressed state in the lumen of the outer sheath and radially constrained by the outer sheath, axial sliding of the outer sheath relative to the handle housing towards the proximal end being capable of canceling the radial constraint on the implant, and during axial sliding of the outer sheath relative to the handle housing towards the proximal end to cancel the radial constraint, the first engaging member being driven into contact with the second engaging member, causing the second engaging member to form a block to the movement of the outer sheath, but the first engaging member being capable of striding over the second engaging member to enable the outer sheath to continue to slide axially towards the proximal end.

[0009] A delivery system comprising an implant and the above-described transporter, the implant being releasably received in a compressed state in the lumen of the outer sheath and radially constrained by the outer sheath, axial sliding of the outer sheath relative to the handle housing towards the proximal end being capable of canceling the radial constraint on the implant; and the axial distance between the first engaging member and the second engaging member being 1 / 5 to 11 / 13 of the axial length of the implant in the compressed state.

[0010] The above-described transporter is used to transport the implant to a target site. When the implant reaches the target site, the outer sheath slides axially relative to the handle housing towards the proximal end under an axial force to release the implant. During this process, the first engaging member is driven into contact with the second engaging member, causing the second engaging member to form a block to the movement of the outer sheath, thereby giving an early warning of the release of the implant. When the operator feels the blocking effect, the operator can slow down the speed of the outer sheath retracting, preventing the implant from being released too much at once, so that when it is found that the implantation position of the implant does not meet the expectation, the length of the implant in contact with the implantation site is shorter, and the position of the implant in the body can be adjusted to meet the expectation. When the position of the implant is adjusted to meet the expectation, since the first engaging member can stride over the second engaging member, the outer sheath continues to slide axially towards the proximal end, thereby completing the release of the implant. Therefore, the controllability of this transporter is good, and it can avoid excessive release of the implant and inability to adjust the position. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Wherein:

[0013] Figure 1 is a perspective view of a conveyor in an embodiment.

[0014] Figure 2 is a schematic structural view of an implant in an embodiment.

[0015] Figure 3 is a schematic structural view of a conveyor in an embodiment.

[0016] Figure 4 is Figure 3 a cross-sectional view along III-III.

[0017] Figure 5 is a schematic partial structural view of a sheath tube assembly in an embodiment.

[0018] Figure 6 is a schematic structural view of a sheath core, a mounting tube, an intermediate tube and an outer sheath tube in an embodiment.

[0019] Figure 7 is a schematic view of the connection state between a mounting tube and a sleeve in an embodiment.

[0020] Figure 8 is a perspective exploded view of a conveyor in an embodiment.

[0021] Figure 9A is a perspective view of a proximal end of a motion track at an angle in an embodiment.

[0022] Figure 9B is a perspective view of a proximal end of a motion track at another angle in an embodiment.

[0023] Figure 10 is Figure 4 an enlarged view of A in

[0024] Figure 11 is a perspective view of a sheath core connection structure in an embodiment.

[0025] Figure 12 is a cross-sectional view of a sheath core connection structure in an embodiment.

[0026] Figure 13 is a cross-sectional view of a proximal end of a conveyor in an embodiment.

[0027] Figure 14 is a perspective view of a knob in an embodiment.

[0028] Figure 15 is a perspective view of a proximal end of a conveyor in an embodiment, in which the locking cap is hidden for showing the retaining ring.

[0029] Figure 16A cross-sectional view of the proximal end of the conveyor in an embodiment. Figure 16 The cutting plane of Figure 3 is perpendicular to the cutting plane of

[0030] Figure 17 A cross-sectional view of a partial structure of the installation pipe connection structure in an embodiment;

[0031] Figure 18 A perspective view of the lock head in an embodiment.

[0032] Figure 19 A perspective cross-sectional view of the connecting frame in an embodiment.

[0033] Figure 20 A perspective view of the safety cover in an embodiment.

[0034] Figure 21 A cross-sectional view of the safety cover in an embodiment.

[0035] Figure 22 A perspective view of a partial structure of the proximal end of the conveyor when the safety cover is in the locked state in an embodiment.

[0036] Figure 23 A perspective view of a partial structure of the proximal end of the conveyor when the safety cover is in the unlocked state in an embodiment.

[0037] Figure 24 A perspective view of the partial structures of the outer sheath tube, the outer sheath tube joint, and the intermediate tube in an embodiment.

[0038] Figure 25 A cross-sectional view of the second handle in an embodiment.

[0039] Figure 26 A state diagram of the implant being partially released in an embodiment. In the figure, for showing the structural form of the implant, only the outer sheath tube of the conveyor is shown. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] In the description of the embodiments of the present invention, it should be noted that for the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0043] In the field of interventional medical devices, generally, the end of a medical device implanted into the human body or animal body that is closer to the operator is called the "proximal end", and the end that is farther from the operator is called the "distal end", and the "proximal end" and "distal end" of any component of the medical device are defined based on this principle. The "axial direction" generally refers to the length direction of the medical device when it is being delivered, and the "radial direction" generally refers to the direction that is not parallel to the "axial direction" of the medical device, and the "axial direction" and "radial direction" of any component of the medical device are defined based on this principle. The "circumferential direction" refers to the circumferential direction, that is, the direction around the axis of the lumen structure or cylinder.

[0044] Please refer to Figure 1 and Figure 2 , this embodiment provides a delivery device 10 for delivering an implant 20, such as for delivering artificial valves, stents, and so on.

[0045] Please refer to Figure 2, in one embodiment, the implant 20 includes a flow-blocking membrane 21 and a plurality of wave loops 22 arranged axially. The flow-blocking membrane 21 is disposed on the plurality of wave loops 22 to form a lumen structure with openings at both ends. The plurality of wave loops 22 are all made of a shape-memory material, so that the implant 20 has a radially self-expanding property. A circumferentially extending slit 211 is formed in the flow-blocking membrane 21. For convenience of description, the wave loop that intersects the circumference where the slit 211 is located among the plurality of wave loops 22 is defined as the first wave loop 23. The wave loop located distally to the first wave loop 23 and axially adjacent to the first wave loop 23 is defined as the second wave loop 24. The end of the implant 20 also has a connection structure 25 for connecting to the delivery device 10. In one embodiment, the connection structure 25 is a bare wave loop.

[0046] Please refer to Figure 1 and Figure 3 , the delivery device 10 includes a sheath assembly 11 and a handle mechanism 17 connected to the sheath assembly 11.

[0047] Please refer to Figure 4 and Figure 5 , the sheath assembly 11 includes a tip 111, a sheath core 112, a mounting tube 113, an intermediate tube 114, an outer sheath 115 and a connecting tube 116 (for the connecting tube 116, refer to Figure 8 ), wherein the distal end of the tip 111 is conical, and the distal end of the tip 111 is connected to the distal end of the sheath core 112 for guiding the sheath core 112 into the punctured site. Please refer to Figure 6 together, a semi-release restraint 1121 is provided at the distal end of the sheath core 112. When the implant 20 (for the implant 20, please refer to Figure 2 ) is loaded on the delivery device 10, the semi-release restraint 1121 is sleeved on a partial length interval of the implant 20. When the outer sheath 115 is retracted and the radial restraint on the implant 20 is removed, the implant 20 expands radially self, and the semi-release restraint 1121 sleeved on the implant 20 can be driven to expand radially, but the radially expanded semi-release restraint 1121 still maintains a radial restraint on the implant 20, so that the part of the implant 20 sleeved by the semi-release restraint 1121 is in a semi-released state. In the semi-released state, the outer diameter of the implant 20 is smaller than the inner diameter of the implantation site, so that the implant 20 is not in a state of adhering to the inner wall of the implantation site (for example, the inner wall of a blood vessel), facilitating the adjustment of the position of the implant 20 in the body. Compared with the state compressed in the outer sheath 115, the radius of the implant 20 in the semi-released state is closer to the inner diameter of the implantation site. When released from the semi-released state to the fully released state, the axial length change is relatively small. Therefore, adjusting the position of the implant 20 in the semi-released state can improve the positioning accuracy.

[0048] The semi-release restraint member 1121 is a flexible member that can be deformed under an external force. In one embodiment, the semi-release restraint member 1121 can be made of a flexible material such as PTFE (Polytetrafluoroethylene, the Chinese name is polytetrafluoroethylene) or PET (Polyethylene Terephthalate, the Chinese name is polyethylene terephthalate). The proximal end of the sheath core 112 is rotatably connected to the handle mechanism 17, so that the sheath core 112 can rotate under the action of an external circumferential force, thereby driving the semi-release restraint member 1121 to rotate. The semi-release restraint member 1121 is screwed together to shorten the axial length, so as to separate from the implant 20, and further release the restraint on the implant 20. It should be noted that the radius of the implant 20 in the semi-release state is smaller than the radius of the implant 20 in the fully released state, and the radius of the implant 20 in the semi-release state is larger than the radius of the implant 20 when it is compressed in the outer sheath 115. It should also be noted that Figure 4 What is shown in Figure 6 is the state where the semi-release restraint member 1121 is sleeved on the sheath core 112 when the transporter 10 is not loaded with the implant 20;

[0049] Please refer to Figure 6 , the semi-release restraint member 1121 includes a connecting sub-member 11211 and a restraining sub-member 11212. The connecting sub-member 11211 is in the shape of a hollow frustum of a cone in the radially expanded state and is used to connect the sheath core 112 and the restraining sub-member 11212. Specifically, the smaller-diameter end of the connecting sub-member 11211 is connected to the sheath core 112, and the larger-diameter end is connected to the restraining sub-member 11212. The connecting sub-member 1121 is sleeved on the sheath core 112, and a gap is formed between the inner wall of the connecting sub-member 11211 and the outer surface of the sheath core 112.

[0050] The restraining sub-member 11212 is in the shape of a cylinder and is sleeved on the sheath core 112. Moreover, a gap is formed between the inner wall of the restraining sub-member 11212 and the outer wall of the sheath core 112 for accommodating the implant 20 (for the implant 20, please refer to Figure 2), thereby realizing the radial constraint on the implant 20. When the outer sheath tube 115 is retracted and the radial constraint on the implant 20 is removed, the implant 20 expands radially by itself, and the binding sub-member 11212 expands radially accordingly but still maintains a certain degree of radial constraint on the implant 20, so that the part of the implant 20 sleeved by the binding sub-member 11212 is in a semi-released state. When it is necessary to remove the semi-released binding on the implant 20, the sheath core 112 is rotated circumferentially, so that one end of the connecting sub-member 11211 connected to the sheath core 112 rotates circumferentially following the sheath core 112, while the end of the binding sub-member 11212 that semi-releases and binds the implant 20 is circumferentially fixed relative to the implant 20. Therefore, the connecting sub-member 11211 is screwed under the driving action of the sheath core 112, and then the connecting sub-member 11211 is intertwined, resulting in a decrease in the diameter of the connecting sub-member 11211. During the process of the diameter of the connecting sub-member 11211 becoming smaller, the connecting sub-member 11211 synchronously drags the binding sub-member 11212 to move distally until the binding sub-member 11212 is separated from the implant 20, thereby releasing the constraint on the implant 20.

[0051] The semi-releasing binding member 1121 of the present embodiment radially binds the implant 20 through the binding sub-member 11212. When binding, the distal end of the implant 20 can be received in the binding sub-member 11212. Moreover, the binding can be released by rotating the sheath core 112, which is convenient for operation. In other embodiments, the connecting sub-member 11211 can also be multiple connecting bands arranged circumferentially at intervals, such as two, three or more connecting bands. One end of the connecting band is connected to the sheath core 112, and the other end is connected to the binding sub-member 11212. In another embodiment, the semi-releasing binding member 1121 further includes a fixing sleeve, and the fixing sleeve is fixedly sleeved on the sheath core 112. One end of the connecting band is connected to the fixing sleeve, and the other end is connected to the binding sub-member 11212.

[0052] In the present embodiment, the binding sub-member 11212 is cylindrical, and the length of the binding sub-member 1121 can be adaptively adjusted according to the length of the implant 20, so that the length of the implant 20 being bound is appropriate, so as to adjust the release position of the implant 20 in a certain unfolded state and provide the positioning accuracy of the release.

[0053] Alternatively, according to the length of the implant 20, the binding length of the implant 20 by the binding sub-member 11212 can also be selected to meet the requirement of adjusting the position of the implant 20 in a certain unfolded state.

[0054] Please refer to Figure 5 and Figure 6 , the installation tube 113 is sleeved on the sheath core 112, and the distal end of the installation tube 113 is located at the tip 111 (please refer to the tip 111 Figure 4) proximal, and has an axial spacing from the tip 111. The proximal end of the installation tube 113 is located distal to the proximal end of the sheath core 112, and the proximal end of the installation tube 113 is connected to the handle mechanism 17 (please refer to the handle mechanism 17 Figure 4 ). The sheath core 112 is rotatable relative to the installation tube 113. In one embodiment, the distal end of the installation tube 113 is provided with an installation structure 117, and the installation structure 117 is used to detachably connect with the implant 20 (please refer to the implant 20 Figure 2 ). The installation structure 117 is located proximal to the semi-release restraint 1121. The installation structure 117 and the semi-release restraint 1121 are respectively connected to the proximal and distal ends of the implant 20.

[0055] Please refer to Figure 7 , a sleeve 118 is provided at the proximal end of the installation tube 113. The sleeve 118 is sleeved on the installation tube 113 and is fixedly connected to the installation tube 113. The proximal end of the installation tube 113 is provided with the sleeve 118, so that a radially outwardly protruding structure is formed at a local position of the proximal end of the installation tube 113. When the installation tube 113 is connected to other structures, this radially outwardly protruding structure (i.e., the sleeve 118) can be radially embedded into the groove provided on other structures, so as to facilitate axial positioning after the installation tube 113 is connected to other structures.

[0056] Please refer to again Figure 5 and Figure 6 , the installation structure 117 includes a base 1171 connected to the distal end of the installation tube 113 and a plurality of locking tubes 1172. The plurality of locking tubes 1172 are fixed on the base 1171, and each locking tube 1172 axially extends distally from the end connected to the base 1171. A part of the material of the tube wall of each locking tube 1172 is removed to form a locking groove 11721. When the implant 20 (please refer to the implant 20 Figure 2 ) is connected to the installation structure 117, the crests of the connection structure 25 of the implant 20 are received in the locking grooves 11721.

[0057] Please continue to refer to Figure 5 and Figure 6 , the intermediate tube 114 is slidably sleeved on the installation tube 113. The distal end of the intermediate tube 114 is located proximal to the installation structure 117. The proximal end of the intermediate tube 114 is located distal to the proximal end of the installation tube 113, and the proximal end of the intermediate tube 114 is connected to the handle mechanism 17 (please refer to the handle mechanism 17 Figure 4) are slidably connected. A plurality of locking rods 119 are provided at the distal end of the intermediate tube 114. The intermediate tube 114 can axially reciprocate relative to the mounting tube 113 under the action of an axial external force, thereby driving the locking rods 119 to switch between positions of being locked and engaged with the mounting structure 117 and being unlocked from the mounting structure 117. Specifically, when the intermediate tube 114 axially slides distally relative to the mounting tube 113, the locking rods 119 are locked and engaged with the mounting structure 117, and the locking rods 119 can lock the connection between the mounting structure 117 and the implant 20 (for the implant 20, please refer to Figure 2 ). When the intermediate tube 114 axially slides proximally relative to the mounting tube 113, the locking rods 119 are unlocked from the mounting structure 117, and the locking rods 119 can release the connection between the mounting structure 117 and the implant 20, so that the implant 20 is released.

[0058] More specifically, when the locking rod 119 is driven by an external force to axially slide distally relative to the mounting tube 113, the locking rod 119 can be inserted into the portion of the locking tube 1172 that is distal to the locking groove 11721. The locking rod 119 is locked with the locking groove 11721, and then the crest of the connecting structure 25 is locked in the locking groove 11721, so that the locking rod 119 locks the connection between the implant 20 and the mounting structure 117. When the locking rod 119 is driven by an external force to axially slide proximally relative to the mounting tube 113, the locking rod 119 can retract into the portion of the locking tube 1172 that is proximal to the locking groove 11721. The locking rod 119 releases the locking of the locking groove 11721, and the connecting structure 25 of the implant 20 can pop out of the locking groove 11721, so as to release the connection between the implant 20 and the mounting structure 117.

[0059] Please refer again to Figure 5 、 Figure 6 and Figure 8 , the outer sheath tube 115 is slidably sleeved on the intermediate tube 114. The distal end of the outer sheath tube 115 is a free end. The connecting tube 116 is sleeved on the proximal end of the outer sheath tube 115 and is fixedly connected to the outer sheath tube 115. The implant 20 (for the implant 20, please refer to Figure 2)It is sleeved on the sheath core 112, and the proximal end of the implant 20 is releasably locked on the mounting structure 117 by the locking rod 119. After being compressed, the implant 20 is loaded into the outer sheath tube 115. The proximal end of the connecting tube 116 is slidably connected to the handle mechanism 17, and the connecting tube 116 serves as an intermediate connecting structure to slidably connect the outer sheath tube 115 and the handle mechanism 17. When the outer sheath tube 115 slides axially distally relative to the sheath core 112, the distal end of the outer sheath tube 115 can abut against the tip 111, thereby sealing the distal end of the outer sheath tube 115 to enclose the implant 20 in the lumen of the outer sheath tube 115, facilitating delivery in a body cavity (such as a blood vessel) of a patient; when the outer sheath tube 115 slides axially proximally relative to the sheath core 112, the distal end of the outer sheath tube 115 is separated from the tip 111, and the implant 20 and the mounting structure 117 can be exposed.

[0060] The distal end of the connecting tube 116 is provided with at least one recessed groove 1161, and the recessed groove 1161 is provided on the outer wall of the connecting tube 116. When the number of the recessed grooves 1161 is multiple, the multiple recessed grooves 1161 are arranged axially. The recessed groove 1161 is annularly arranged, and the opening of the recessed groove 1161 is arranged radially outward.

[0061] Please refer to Figure 8 and Figure 10 , the delivery device 10 further includes a first fitting 11a, a part of the first fitting 11a is received in the recessed groove 1161, and another part of the first fitting 11a protrudes from the recessed groove 1161.

[0062] In one embodiment, the first fitting 11a is an annular member. For example, the first fitting 11a is a damping ring (such as a silica gel ring, a rubber ring, etc.) that is partially received in the recessed groove 1161. Since the mounting base of the first fitting 11a (i.e., the connecting tube 116) is a tubular structure, the first fitting 11a is arranged in an annular structure, which can facilitate the installation of the first fitting 11a on the connecting tube 116 and is beneficial to increasing the connection strength between the first fitting 11a and the connecting tube 116. In addition, the structure on the connecting tube 116 for connecting with the first fitting 11a is the recessed groove 1161, and the recessed groove 1161 can axially position the first fitting 11a, which can further enhance the connection strength between the first fitting 11a and the connecting tube 116.

[0063] In other embodiments, the connecting tube 116 can be omitted. Correspondingly, the first fitting 11a can be directly provided on the outer sheath tube 115.

[0064] Please refer to Figure 1 and Figure 8, the handle mechanism 17 includes a handle housing 171 and a locking ring 172. The handle housing 171 includes two parts that are fitted together. After the two parts are fitted together, they are connected to the locking ring 172, so that the two parts are fixed as an integral structure by the locking ring 172, thereby preventing the two parts of the handle housing 171 from separating from each other. The locking ring 172 can be connected to the handle housing 171 by means of threaded connection or snap connection, etc. The proximal end of the sheath core 112 is rotatably connected to the proximal end of the handle housing 171.

[0065] Please continue to refer to Figure 1 and Figure 8 , the handle housing 171 includes a first handle 1711 and a motion track 1712. The motion track 1712 is connected to the first handle 1711 and extends axially towards the proximal end. Each of the two parts of the handle housing 171 includes half of the first handle 1711 and the motion track 1712 in the circumferential direction. After the two parts are fitted together, a complete first handle 1711 and motion track 1712 are formed.

[0066] Please refer to again Figure 1 and Figure 8 , in one embodiment, the first handle 1711 is located at the distal end of the handle housing 171. The proximal end of the first handle 1711 is connected to the distal end of the motion track 1712. The first handle 1711 is formed with a handle cavity 17111. A plurality of ribs 17112 are provided on the outer surface of the first handle 1711 to increase the friction when the operator holds the first handle 1711. In other embodiments, the first handle 1711 may also be located at the proximal end of the handle housing 171, and the distal end of the first handle 1711 is connected to the proximal end of the motion track 1712.

[0067] Please refer to Figure 8 , the motion track 1712 includes axially connected first, second, and third pipe sections 1713, 1714, and 1715, where the first, second, and third pipe sections 1713, 1714, and 1715 are distributed in sequence from far to near. In one embodiment, the outer diameters of the first, second, and third pipe sections 1713, 1714, and 1715 decrease in sequence. In another embodiment, the outer diameters of the first pipe section 1713 and the second pipe section 1714 are equal, and the outer diameter of the third pipe section 1715 is smaller than the outer diameter of the first pipe section 1713. Or, the outer diameters of the second pipe section 1714 and the third pipe section 1715 are equal, and the outer diameter of the second pipe section 1714 is smaller than the outer diameter of the first pipe section 1713. Or, the outer diameters of the first, second, and third pipe sections 1713, 1714, and 1715 are all equal. In other embodiments, the size relationship of the outer diameters of the first, second, and third pipe sections 1713, 1714, and 1715 may not be limited, as long as the first, second, and third pipe sections 1713, 1714, and 1715 are connected in sequence from far to near.

[0068] Please refer to Figure 1 and Figure 8 , the first pipe section 1713 has a first track cavity, the second pipe section 1714 has a second track cavity, the third pipe section 1715 has a third track cavity, the first track cavity, the second track cavity and the third track cavity communicate with each other and jointly form the track cavity 17121, the track cavity 17121 communicates with the handle cavity 17111, and jointly forms the receiving cavity 1718 of the handle housing 171. Two track holes 1719 communicating with the track cavity 17121 are formed in the movement track 1712, the two track holes 1719 are located in the first pipe section 1713, the two track holes 1719 extend along the length direction of the first pipe section 1713, and are symmetrically distributed along the radial direction. The proximal end of the sheath core 112 (for the sheath core 112, please refer to Figure 5 ) passes through the receiving cavity 1718 and is connected to the proximal end of the movement track 1712. Please also refer to Figure 9A , two through holes 171a communicating with the track cavity 17121 are also formed in the movement track 1712. The two through holes 171a extend along the length direction of the movement track 1712 and are symmetrically distributed along the radial direction. A part of the through hole 171a is located in the first pipe section 1713, and the other part is located in the second pipe section 1714. In other embodiments, the two through holes 171a may not be symmetrically distributed along the radial direction. In another embodiment, the number of the through holes 171a may be only one.

[0069] Please refer to Figure 8 , in one embodiment, a first positioning groove 17151 and a second positioning groove 17152 are provided on the inner wall of the third pipe section 1715, and the first positioning groove 17151 and the second positioning groove 17152 are spaced apart along the axial direction. Please also refer to Figure 9B , two convex strips 17153 extending along the circumferential direction are provided on the outer surface of the third pipe section 1715, the two convex strips 17153 are arranged opposite to each other along the radial direction, and the distance between the two convex strips 17153 and the proximal end of the second pipe section 1714 is set. A limiting protrusion 17154 is provided at one end (i.e., the distal end) of the convex strip 17153 facing the second pipe section 1714. In another embodiment, only one convex strip 17153 extending along the circumferential direction is provided on the outer surface of the third pipe section 1715. In one embodiment, a limiting protrusion 17154 is provided on one side of the convex strip 17153 facing the second pipe section 1714.

[0070] In other embodiments, when the first handle 1711 is located at the proximal end of the handle housing 171 and the distal end of the first handle 1711 is connected to the proximal end of the movement track 1712, the first positioning groove 17151 is located on the inner wall of the first handle 1711.

[0071] Please refer to Figure 8 and Figure 10, the transporter 10 further includes a second mating member 11b, which is used to cooperate with the first mating member 11a to form a certain degree of blockage to the movement of the outer sheath tube 115, so as to give an early warning of the release degree of the implant 20, and consciously control the release speed of the outer sheath tube 115, thereby controlling the release degree of the implant 20, so that when the release position is inaccurate, the release position of the implant 20 can be adjusted.

[0072] The second mating member 11b is arranged on the handle housing 171 (for example, arranged on the first handle 1711 or the movement track 1712). The specific setting position of the second mating member 11b on the handle housing 171 can be selected according to the axial length of the implant 20 (please refer to the implant 20 Figure 2 ). During the process that the outer sheath tube 115 slides axially proximally relative to the handle housing 171 to release the implant 20, the first mating member 11a is driven to contact the second mating member 11b, so that the second mating member 11b forms a blockage to the movement of the outer sheath tube 115, thereby giving an early warning of the release degree of the implant 20, and consciously controlling the sliding speed of the outer sheath tube 115, thereby controlling the release degree of the implant 20, so that when the release position is inaccurate, the release position of the implant 20 can be adjusted. Moreover, under the action of an external force, the first mating member 11a can cross over the second mating member 11b to enable the outer sheath tube 115 to continue to slide axially proximally, so that the implant 20 can be completely released.

[0073] In one embodiment, the second mating member 11b is arranged on the inner wall of the first pipe section 1713. Specifically, the second mating member 11b is an annular member. The second mating member 11b is coaxially arranged with the first mating member 11a, and the second mating member 11b surrounds the longitudinal central axis of the handle housing 17. For example, the second mating member 11b is a snap ring arranged on the inner wall of the first pipe section 1713. The inner diameter of the second mating member 11b is smaller than the outer diameter of the first mating member 11a. When the first mating member 11a moves to contact the second mating member 11b, the outer side of the first mating member 11a is squeezed by the second mating member 11b. Since both the first mating member 11a and the second mating member 11b are annular members, the force on the outer side of the first mating member 11a can be more uniform, the damping feeling is more obvious, and the early warning effect is more obvious.

[0074] It can be understood that in other embodiments, the first engaging member 11a and the second engaging member 11b are not limited to being annular. For example, the first engaging member 11a is a non-annular protrusion provided on the outer sheath 115 or the connecting tube 116, and the second engaging member 11b is a non-annular protrusion provided on the inner wall of the first handle 1171 or the movement track 1172. Alternatively, one of the first engaging member 11a and the second engaging member 11b is an annular structure, and the other is a non-annular protrusion. In short, the movement of the outer sheath 115 is blocked by the second engaging member 11b, and the first engaging member 11a can cross the second engaging member 11b under the action of an external force.

[0075] In one embodiment, the number of the recessed grooves 1161 is multiple, and the number of the first engaging members 11a is multiple. The multiple recessed grooves 1161 and the multiple first engaging members 11a correspond to each other one by one. The second engaging member 11b is one or more. In the loaded state, when the number of the first engaging members 11a is multiple and the number of the second engaging members 11b is one, a gap is formed between the first engaging member 11a at the proximal end and the second engaging member 11b; when the number of the first engaging members 11a is multiple and the number of the second engaging members 11b is multiple, a gap is formed between the first engaging member 11a at the proximal end and the second engaging member 11b at the distal end. With such a setting, when the outer sheath 115 is retracted, each first engaging member 11a is blocked by the second engaging member 11b, so that the retraction speed of the outer sheath 115 can be better controlled, and thus the position of the implant 20 can be better observed during the retraction of the outer sheath 115, so as to adjust the position of the implant 20 (if necessary).

[0076] In one embodiment, the number of the recessed grooves 1161 is multiple, and the number of the first engaging members 11a is one. The first engaging member 11a can be installed in any one of the recessed grooves 1161, so that the recessed groove 1161 in which the first engaging member 11a is installed can be selected according to the length of different implants 20 (for the implants 20, refer to Figure 2 ). The second engaging member 11b is one. In this way, the versatility of the conveyor 10 can be increased, so that the conveyor 10 can be applicable to implants 20 with different length specifications. The first engaging member 11a can be installed on a suitable recessed groove 1161 according to the length of the implant 20, so as to give an early warning of the release degree of the implant 20 at an appropriate time during the release process, control the release length of the implant 20, and adjust the position of the implant 20 in case the release position of the implant 20 does not meet the expectation.

[0077] In another embodiment, the number of the first mating member 11a is one, and the number of the second mating members 11b is plural. During the retraction of the outer sheath 115, the plural second mating members 11b sequentially interfere with the first mating member 11a, so that the retraction speed of the outer sheath 115 can be better controlled. Thus, the position of the implant 20 can be better observed during the retraction of the outer sheath 115, so as to adjust the position of the implant 20 (if necessary).

[0078] After the implant 20 is delivered to the target site, the outer sheath 115 slides proximally relative to the first handle 1711 under an axial force to release the implant 20. During this process, the first mating member 11a is driven into contact with the second mating member 11b, so that the second mating member 11b blocks the movement of the outer sheath 115, thereby warning of the release of the implant 20. When the operator feels the blocking effect, the retraction speed of the outer sheath 115 can be slowed down to prevent excessive release of the implant 20 at once. When it is found that the implantation position of the implant 20 does not meet the expectation, the length of the implant 20 in contact with the implantation site is short, and the position of the implant 20 in the body can be adjusted to meet the expectation. After the position of the implant 20 is adjusted to meet the expectation, since the first mating member 11a can cross the second mating member 11b under an external force, the outer sheath 115 continues to move axially proximally, and then the release of the implant 20 is completed. Therefore, the controllability of the delivery device 10 is good, and excessive release of the implant 20 and inability to adjust the position can be avoided.

[0079] In the embodiment including the semi-release restraint member 1121, during the release of the implant 20, the distal end of the implant 20 is released first. The distal part of the length section where the implant 20 is first released is radially self-expanded and still semi-released and restrained by the restraint sub-member 11212. After the implant 20 is completely released from the outer sheath 115, the restraint sub-member 11212 is moved distally relative to the implant 20 to separate from the implant 20. In this embodiment, after the outer sheath 115 is retracted to release the restraint on the semi-release restraint member 1121, the implant 20 is in a certain degree of radially expanded state but not in contact with the lumen anatomical structure (such as blood vessel). Positioning the implant 20 in this state helps to improve the positioning accuracy of the implant 20 in the body.

[0080] Further, in the embodiment including the mounting structure 117, during the separation of the restraint sub-member 11212 from the implant 20, the proximal end of the implant 20 is locked to the mounting structure 117 by the locking rod 119, which can prevent the implant 20 from being displaced, thereby ensuring the positioning accuracy of the implant 20 in the body. After the implant 20 is released from the restraint sub-member 11212, the connection between the connection structure 25 and the mounting structure 117 is released, so that the implant 20 is released from the delivery device 10 to complete the implantation.

[0081] Understandably, different from the above embodiments, in other embodiments, the first engaging member 11a may also be provided on the second handle 173 (the second handle 173 will be described in detail hereinafter, refer to Figure 1 and Figure 8 ). A part of the first engaging member 11a extends into the receiving cavity 1718 through the track hole 1719. During the process that the outer sheath tube 115 slides proximally relative to the handle housing 171 under an axial force to release the implant 20, the first engaging member 11a can be driven to contact the second engaging member 11b and generate a sense of blockage.

[0082] In this embodiment, the first engaging member 11a is made of a damping material, and the second engaging member 11b is made of a non-damping material. In another embodiment, the second engaging member 11b is made of a damping material, and the first engaging member 11a is made of a non-damping material. In other embodiments, both the first engaging member 11a and the second engaging member 11b may be made of a damping material. In short, at least one of the first engaging member 11a and the second engaging member 11b is made of a damping material. When the first engaging member 11a contacts the second engaging member 11b, a sense of blockage can be generated, and the first engaging member 11a can be forced to cross the second engaging member 11b.

[0083] Please refer to Figure 11 and Figure 12, the sheath tube assembly 11 further includes a sheath core connection structure 11c for connecting the sheath core 112 and the handle housing 171. The sheath core connection structure 11c includes a sheath core connection portion 11c1, a first joint 11c2, and a baffle 11c3. The sheath core connection portion 11c1 is located at the distal end of the sheath core connection structure 11c, the first joint 11c2 is located at the proximal end of the sheath core connection structure 11c, and the baffle 11c3 is located between the sheath core connection portion 11c1 and the first joint 11c2. The sheath core connection portion 11c1, the first joint 11c2, and the baffle 11c3 are integrally connected. An axially extending mounting hole 11c4 is formed in the sheath core connection structure 11c, and the mounting hole 11c4 axially penetrates the sheath core connection portion 11c1 and the baffle 11c3 to facilitate the insertion of the proximal end of the sheath core 112 into the mounting hole 11c4 to be connected to the sheath core connection structure 11c. A radially outwardly protruding bump 11c11 is provided on the outer wall of the sheath core connection portion 11c1, and there is a gap between the bump 11c11 and the baffle 11c3 in the axial direction. A radially extending glue injection hole 11c12 is formed in the sheath core connection portion 11c1, and the glue injection hole 11c12 is located between the bump 11c11 and the baffle 11c3. The glue injection hole 11c12 radially penetrates the sheath core connection portion 11c1 and communicates with the mounting hole 11c4 to facilitate the injection of glue into the mounting hole 11c4, making the connection between the sheath core 112 and the sheath core connection structure 11c more secure. A latch 11c31 is provided at the proximal end of the baffle 11c3. The first joint 11c2 is formed with a through hole 11c21 that extends along the length direction of the first joint 11c2 and penetrates the proximal and distal ends of the first joint 11c2, and the through hole 11c21 communicates with the mounting hole 11c4. An external thread 11c22 is provided at the distal end of the first joint 11c2.

[0084] When the sheath core 112 is connected to the sheath core connection structure 11c, the proximal end of the sheath core 112 is inserted into the mounting hole 11c4, and the proximal end of the sheath core 112 is fixedly connected to the inner wall of the mounting hole 11c4. The inner cavity of the sheath core 112 communicates with the mounting hole 11c4 and the through hole 11c21.

[0085] Please refer to Figure 8 and Figure 13, when the sheath core connection structure 11c is connected to the handle housing 171, the sheath core connection portion 11c1 is received in the receiving cavity 1718. The bump 11c11 is rotatably inserted into the first positioning groove 17151, so that the sheath core 112 and the sheath core connection structure 11c are rotatably connected to the movement track 1712. The first positioning groove 17151 can axially position the bump 11c11, so that the sheath core 112 and the sheath core connection structure 11c are axially positioned relative to the movement track 1712, preventing the sheath core 112 and the sheath core connection structure 11c from axially moving relative to the handle mechanism 17. The distal end of the baffle 11c3 abuts against the proximal end of the movement track 1712, which can also axially position the sheath core 112 and the sheath core connection structure 11c relative to the handle mechanism 17, and can prevent the sheath core 112 and the sheath core connection structure 11c from moving distally relative to the movement track 1712. The first joint 11c2 extends from the proximal end of the movement track 1712 to the proximal end. The first joint 11c2 is used to connect the syringe to inject physiological saline into the inner cavity of the sheath core 112, so as to discharge the air in the inner cavity of the sheath core 112. Of course, the first joint 11c2 can also allow the guide wire to pass through, so that the guide wire can pass through the sheath core 112. When the sheath core connection structure 11c is subjected to a circumferential force, the sheath core connection structure 11c can drive the sheath core 112 to rotate circumferentially relative to the first handle 1711 (please refer to the first handle 1711 Figure 1 ).) and the movement track 1712.

[0086] In one embodiment, the sheath core connection structure 11c can omit the first joint 11c2. After omitting the first joint 11c2, it does not affect the connection between the sheath core connection structure 11c and the sheath core 112, nor does it affect the connection between the sheath core connection structure 11c and the handle housing 171. After omitting the first joint 11c2, the syringe is inserted into the mounting hole 11c4 to inject physiological saline into the inner cavity of the sheath core 112, so as to discharge the air in the inner cavity of the sheath core 112.

[0087] Please refer to Figure 8 , Figure 13 and Figure 14 , the handle mechanism 17 further includes a knob 174. The knob 174 is rotatably sleeved on the proximal end of the movement track 1712. Specifically, the knob 174 is rotatably sleeved on the third pipe section 1715. The knob 174 includes a hollow cylinder 1741. The outer side surface of the hollow cylinder 1741 is provided with anti-slip stripes 17411 to prevent slipping when rotating the knob 174. The hollow cylinder 1741 has a bottom 17412, and a card hole 17413 corresponding to the card block 11c31 is opened on the bottom 17412. Please refer to Figure 15 and Figure 16, the knob 174 is rotatably sleeved on the proximal end of the movement track 1712, the bottom 17412 abuts against the proximal end of the baffle 11c3, and the locking hole 17413 is correspondingly clamped with the locking block 11c31, which can prevent the knob 174 from axially moving towards the distal end. When the knob 174 is subjected to a circumferential force, it can rotate relative to the movement track 1712 and can drive the sheath core 112 to rotate circumferentially relative to the movement track 1712.

[0088] Please refer to Figure 13 , the handle mechanism 17 further includes a locking cap 175. The locking cap 175 has internal threads, and the internal threads of the locking cap 175 are connected to the external threads 11c22 of the first joint 11c2. The distal end of the locking cap 175 abuts against the proximal end of the knob 174 (i.e., the proximal end of the bottom 17412) to axially limit the knob 174 and prevent the knob 174 from axially moving towards the proximal end. The proximal end of the first joint 11c2 passes through the locking cap 175 and is exposed outside the locking cap 175 to be connected to a syringe or for a guide wire to be inserted.

[0089] Please refer to Figure 13 and Figure 17 , the sheath tube assembly 11 further includes an installation tube connection structure 11d. The installation tube connection structure 11d includes a locking portion 11d0 and a locking head 11d4. The locking portion 11d0 includes a limiting ring 11d1, a threaded tube 11d2, and a limiting tube 11d3. The limiting ring 11d1 has a central through hole 11d11. Please refer to Figure 17 , the threaded tube 11d2 is connected to the distal end of the limiting ring 11d1. The threaded tube 11d2 has a threaded hole 11d21. The threaded hole 11d21 communicates with the central through hole 11d11, and the aperture of the threaded hole 11d21 is larger than the aperture of the central through hole 11d11. At least a part of the limiting ring 11d1 protrudes radially outward relative to the circumferential surface of the threaded tube 11d2. The limiting tube 11d3 is connected to the proximal end of the limiting ring 11d1. The lumen of the limiting tube 11d3 communicates with the central through hole 11d11, and the central axis of the limiting tube 11d3 is collinear with the central axis of the central through hole 11d11. The inner diameter of the lumen of the limiting tube 11d3 is smaller than the aperture of the central through hole 11d11, so as to form a first limiting step 11d31 at the proximal end of the limiting ring 11d1. At least a part of the limiting ring 11d1 protrudes radially outward relative to the circumferential surface of the limiting tube 11d3. In one embodiment, the limiting ring 11d1, the threaded tube 11d2, and the limiting tube 11d3 are integrally connected.

[0090] Please refer to Figure 18 , the locking head 11d4 includes a locking plate 11d41 and a screw rod 11d42. The locking plate 11d41 is connected to the distal end of the screw rod 11d42. Please refer to Figure 13 , Figure 17 and Figure 18, the lock head 11d4 is provided with a through groove 11d43 which axially penetrates through the lock plate 11d41 and the screw rod 11d42 and radially penetrates through one side of the lock plate 11d41 and the screw rod 11d42, so that after the mounting tube 113 is received in the through groove 11d43, glue can be injected into the through groove 11d43, thereby firmly connecting the lock head 11d4 and the mounting tube 113 together. The screw rod 11d42 is threadedly connected with the threaded tube 11d2. After the screw rod 11d42 is connected with the threaded tube 11d2, the screw rod 11d42 abuts against the limiting ring 11d1.

[0091] Please refer to Figure 13 , Figure 17 and Figure 18 , the proximal end of the mounting tube 113 passes through the through groove 11d43 and is received in the central through hole 11d11. The proximal end of the sleeve 118 (for the sleeve 118, please refer to Figure 7 ) abuts against the first limiting step 11d31, and the distal end abuts against the proximal end of the screw rod 11d42, so that the mounting tube 113 is axially positioned relative to the mounting tube connection structure 11d through the sleeve 118. The mounting tube 113 can be connected to the moving track 1712 through the mounting tube connection structure 11d. Specifically, the radially outward protruding part of the limiting ring 11d1 relative to the threaded tube 11d2 and the limiting tube 11d3 is caught in the second positioning groove 17152, so that the mounting tube 113 is connected to the moving track 1712 and axially positioned relative to the moving track 1712, thereby connecting the mounting tube 113 to the moving track 1712.

[0092] In an embodiment, the locking part 11d0 can omit the limiting tube 11d3. After omitting the limiting tube 11d3, the mounting tube 113 is directly fixedly connected to the limiting ring 11d1. For example, the mounting tube 113 is fixedly connected to the limiting ring 11d1 by glue.

[0093] Please refer to Figure 13 and Figure 19, the sheath tube assembly 11 further includes an intermediate tube connection structure 11e, and the intermediate tube connection structure 11e includes a connection frame 11e1, a sealing ring 11e2, a sealing end cap 11e3 and a joint end cap 11e4. The connection frame 11e1 includes a first connection portion 11e11 and a second connection portion 11e12 connected to each other. The first connection portion 11e11 is received in the track cavity 17121 and extends axially. A part of the distal end of the first connection portion 11e11 is sleeved on the proximal end of the intermediate tube 114, and the proximal end of the first connection portion 11e11 is slidably sleeved on the mounting tube 113. The first connection portion 11e11 is provided with a distal through hole 11e111 at the distal end for the intermediate tube 114 to be inserted therein. The first connection portion 11e11 is provided with a proximal through hole 11e112 at the proximal end, and the proximal through hole 11e112 communicates with the distal through hole 11e111 for the sheath core 112 and the mounting tube 113 to pass through the first connection portion 11e11. A plurality of glue dispensing grooves 11e113 are formed on the inner wall of the distal through hole 11e111 for accommodating glue to fixedly connect the first connection portion 11e11 and the intermediate tube 114. The aperture of the proximal through hole 11e112 at the distal end is smaller than the aperture of the distal through hole 11e111 at the proximal end, so as to form a second step 11e114 at the proximal end of the distal through hole 11e111 to abut against the proximal end of the intermediate tube 114, thereby axially positioning the intermediate tube 114 and preventing the intermediate tube 114 from moving proximally relative to the first connection portion 11e11. The proximal end of the first connection portion 11e11 is provided with an external connection thread 11e115. The sealing ring 11e2 is disposed at the proximal end of the first connection portion 11e11. The sealing end cap 11e3 is provided with an end cap through hole 11e31 for the sheath core 112 and the mounting tube 113 to pass through. The sealing end cap 11e3 is threadedly connected to the external connection thread 11e115 of the first connection portion 11e11, and the sealing end cap 11e3 and the first connection portion 11e11 cooperate to axially clamp the sealing ring 11e2 together, so that the sealing ring 11e2 is radially expanded and deformed, and the radially inner side of the sealing ring 11e2 abuts against the outer wall of the mounting tube 113, thereby sealing the proximal end of the first connection portion 11e11.

[0094] Please continue to refer to Figure 13 and Figure 19, the second connecting portion 11e12 extends radially and includes a first side connecting sub-portion 11e121 and a second side connecting sub-portion 11e122. The first side connecting sub-portion 11e121 and the second side connecting sub-portion 11e122 are respectively located on two radially opposite sides of the first connecting portion 11e11 and are connected to the first connecting portion 11e11. The first side connecting sub-portion 11e121 extends radially from one end connected to the first connecting portion 11e11, and the second side connecting sub-portion 11e122 extends radially from one end connected to the first connecting portion 11e11. A second joint 11e123 is provided at one end of the first side connecting sub-portion 11e121 away from the first connecting portion 11e11. The second joint 11e123 has a through hole 11e124 extending in the length direction, and the through hole 11e124 communicates with the proximal through hole 11e112 and the distal through hole 11e111. The joint end cap 11e4 is detachably connected to the second joint 11e123. When the joint end cap 11e4 is connected to the second joint 11e123, the joint end cap 11e4 can seal the second joint 11e123; when the joint end cap 11e4 is separated from the second joint 11e123, the second joint 11e123 can be connected to a syringe, and normal saline is injected into the intermediate tube 114 through the syringe, so as to discharge the air in the intermediate tube 114 and the outer sheath tube 115.

[0095] Please refer to Figure 9B , Figure 13 and Figure 19 , when the intermediate tube connection structure 11e is connected to the handle housing 171, the first side connecting sub-portion 11e121 and the second side connecting sub-portion 11e122 respectively pass through two through holes 171a of the movement track 1712 and can move axially along the through holes 171a. The first side connecting sub-portion 11e121 and / or the second side connecting sub-portion 11e122 are driven by an axial external force to slide axially in the through hole 171a, so that the locking rod 119 is switched between the position of connecting the locking installation structure 117 (please refer to the locking rod 119 and the installation structure 117 in Figure 6 ) and the implant 20 (please refer to the implant 20 in Figure 2 ) and the position of releasing the connection between the installation structure 117 and the implant 20.

[0096] Understandably, in other embodiments, when the number of through holes 171a is only one, the second connecting portion 11e12 only includes one of the above-mentioned first side connecting sub-portion 11e121 and second side connecting sub-portion 11e122, and one of the first side connecting sub-portion 11e121 and second side connecting sub-portion 11e122 is slidably disposed within the through hole 171a. One of the first side connecting sub-portion 11e121 and second side connecting sub-portion 11e122 is driven by an axial external force to slide back and forth within the through hole 171a, which can also cause the locking lever 119 to switch between the position of locking the connection between the locking installation structure 117 and the implant 20 and the position of releasing the connection between the installation structure 117 and the implant 20.

[0097] Please also refer to Figure 13 , Figure 20 and Figure 21 , the intermediate pipe connection structure 11e further includes a safety cover 11e5. The safety cover 11e5 includes a first portion 11e51 in a cylindrical shape and a second portion 11e52. The proximal end of the first portion 11e51 is connected to the distal end of the second portion 11e52. Two safety cover through holes 11e511 are formed at the distal end of the first portion 11e51. The two safety cover through holes 11e511 are radially symmetrically distributed and correspond to the portions of the two through holes 171a (please refer to the through holes 171a Figure 9B ) located within the second pipe section 1714, that is, a part of the proximal ends of the two through holes 171a corresponds. Specifically, the shapes and sizes of the two safety cover through holes 11e511 can be the same as the shapes and sizes of the portions of the two through holes 171a located within the second pipe section 1714. In other embodiments, the size of the safety cover through hole 11e511 can be larger than the size of the corresponding portion of the through hole 171a within the second pipe section 1714.

[0098] Please refer to Figure 21 , the second portion 11e52 has an inner surface that is closer to the central axis of the first portion 11e51 than the inner surface of the first portion 11e51, so that the second portion 11e52 protrudes inward relative to the inner surface of the first portion 11e51. Understandably, in other embodiments, when the outer diameters of the second pipe section 1714 and the third pipe section 1715 are equal, correspondingly, the distances from the inner surfaces of the first portion 11e51 and the second portion 11e52 to the central axis of the first portion 11e51 are also equal.

[0099] Please refer to Figure 21 , two convex strips 17153 are formed on the second portion 11e52 (please refer to the convex strips 17153 Figure 9B)The corresponding two guide rail structures 11e521. The guide rail structure 11e521 includes a guide inlet 11e521a and a track groove 11e521b communicating with the guide inlet 11e521a. The width of the guide inlet 11e521a gradually decreases in the direction from the distal end to the proximal end (i.e., Figure 21 the direction from the left end to the right end in

[0100] ), and the minimum width of the guide inlet 11e521a is greater than or equal to the circumferential length of the rib 17153, which is beneficial to guiding the rib 17153 into the guide inlet 11e521a and the track groove 11e521b. A pit 11e521c corresponding to the limit protrusion 17154 is formed on the groove wall of the track groove 11e521b.

[0101] Please refer to Figure 9B 、 Figure 13 and Figure 21 , the insurance cover 11e5 is rotatably sleeved on a part of the third pipe section 1715 and the second pipe section 1714. Specifically, the first part 11e51 is sleeved on the second pipe section 1714, and the distal end of the first part 11e51 abuts against the proximal end of the first pipe section 1713. The second part 11e52 is sleeved on the third pipe section 1715, and the distal end of the second part 11e52 abuts against the proximal end of the second pipe section 1714, and the proximal end of the second part 11e52 abuts against the distal end of the knob 174. The rib 17153 on the third pipe section 1715 enters the track groove 11e521b from the guide inlet 11e521a, and the rib 17153 on the third pipe section 1715 is slidably received in the track groove 11e521b. Please refer to Figure 22, when the safety cover 11e5 is subjected to a circumferential force, it can rotate circumferentially relative to the movement track 1712. The convex strip 17153 slides relative to the track groove 11e521b until it abuts against one end of the track groove 11e521b that is far from the guiding inlet 11e521a. At this time, the safety cover 11e5 is in a locked state. The parts of the two safety cover through holes 11e511 and the two through holes 171a in the second pipe section 1714 are radially staggered. The distal end of the safety cover 11e5 abuts against the first side connection sub - part 11e121 and the second side connection sub - part 11e122. That is, a part of the through hole 171a is blocked by the safety cover 11e5, so that the intermediate pipe connection structure 11e cannot move proximally along the through hole 171a, and further the intermediate pipe connection structure 11e cannot drive the locking rod 119 to move proximally to release the installation structure 117 (for the locking rod 119 and the installation structure 117, please refer to Figure 5 ), and the connection between the implant 20 (for the implant 20, please refer to Figure 2 ), preventing the implant 20 from being released prematurely.

[0102] Please refer to Figure 23 together. When the safety cover 11e5 rotates under the circumferential force until the convex strip 17153 abuts against the other end of the track groove 11e521b, at this time, the safety cover 11e5 is in an unlocked state. The parts of the two safety cover through holes 11e511 and the two through holes 171a in the second pipe section 1714 are radially opposite. An axial force towards the proximal end is applied to the first side connection sub - part 11e121 and / or the second side connection sub - part 11e122, so that the intermediate pipe connection structure 11e drives the locking rod 119 to move proximally to release the connection between the installation structure 117 and the implant 20. It should be noted that the parts of the safety cover through hole 11e511 and the through hole 171a in the second pipe section 1714 being radially opposite means that the proximal part of the through hole 171a is not blocked by the safety cover 11e5.

[0103] It can be understood that when there is no limit protrusion 17154 on the side of the convex strip 17153 facing the second pipe section 1714, the pit 11e521c corresponding to the limit protrusion 17154 can be omitted on the groove wall of the track groove 11e521b. Since the omission of the limit protrusion 17154 and the pit 11e521c does not affect the sliding of the convex strip 17153 in the track groove 11e521b, it does not affect the circumferential rotation of the safety cover 11e5 relative to the movement track 1712, and further does not affect the locking and unlocking of the safety cover 11e5 to the second connection part 11e12. After omitting the limit protrusion 17154 and the pit 11e521c, the structures of the movement track 1712 and the safety cover 11e5 can be simplified, the processing technology can be simplified, which is conducive to reducing the production cost.

[0104] However, in the solution where the limiting protrusion 17154 is provided on the rib 17153 and the pit 11e521c corresponding to the limiting protrusion 17154 is formed on the groove wall of the track groove 11e521b, when the safety cover 11e5 rotates to the position where the rib 17153 abuts against the end of the track groove 11e521b away from the inlet 11e521a, the limiting protrusion 17154 falls into the pit 11e521c. The pit 11e521c can limit the limiting protrusion 17154 to a certain extent, so that there is a certain sense of block when the limiting protrusion 17154 moves out of the pit 11e521c, avoiding the random rotation of the safety cover 11e5, and further enabling the part of the safety cover through hole 11e511 and the through hole 171a in the second pipe section 1714 to maintain a radially opposite state. When it is necessary to release the limitation on the limiting protrusion 17154, by applying a circumferential force to the safety cover 11e5, elastic deformation occurs in at least one of the side walls of the limiting protrusion 17154 and the pit 11e521c, so that the limiting protrusion 17154 can move out of the pit 11e521c, and then the limitation on the limiting protrusion 17154 is released, thereby continuing to drive the safety cover 11e5 to move.

[0105] By arranging the cooperation between the safety cover 11e5 and the connecting frame 11e1, the movement of the intermediate pipe connecting structure 11e can be restricted, thereby restricting the movement of the intermediate pipe 114, which helps to avoid the premature release of the proximal end of the implant 20 due to misoperation.

[0106] By providing the guide rail structure 11e521 on the safety cover 11e5 and the rib 17153 cooperating with the guide rail structure 11e521 on the movement track 1712, the safety cover 11e5 can be better limited, and the random rotation of the safety cover 11e5 caused by misoperation can be avoided, improving the reliability of the limiting effect of the safety cover 11e5 on the intermediate pipe 114.

[0107] By providing the pit 11e521c on the safety cover 11e5 and the limiting protrusion 17154 cooperating with the pit 11e521c on the rib 17153, further, the random rotation of the safety cover 11e5 caused by misoperation can be avoided, improving the reliability of the limiting effect of the safety cover 11e5 on the intermediate pipe 114.

[0108] It can also be understood that, in one embodiment, the outer surface of the third pipe section 1715 may omit the rib 17153, and then the guide rail structure 11e521 on the second part 11e52 may be omitted. After omitting the rib 17153 and the guide rail structure 11e521, it does not affect the rotation of the safety cover 11e5 relative to the movement track 1712. In another embodiment, only one rib 17153 is provided on the outer surface of the third pipe section 1715, and only one guide rail structure 11e521 is formed on the second part 11e52 to cooperate with the rib 17153. By the cooperation of one rib 17153 and the guide rail structure 11e521, the safety cover 11e5 can also preferably limit the movement of the intermediate pipe 114.

[0109] Compared with the solution in which two ribs 17153 as described above are provided on the outer surface of the third pipe section 1715 and only two guide rail structures 11e521 as described above are formed on the second part 11e52, only one rib 17153 is provided on the third pipe section 1715 and only one guide rail structure 11e521 is provided on the second part 11e52, which can simplify the structure and save the production cost.

[0110] However, when two ribs 17153 as described above are provided on the outer surface of the third pipe section 1715 and two guide rail structures 11e521 as described above are formed on the second part 11e52, the force on the safety cover 11e5 can be more balanced during the circumferential rotation relative to the movement track 1712, the rotation can be smoother, and the jamming of the safety cover 11e5 during rotation can be avoided.

[0111] In other embodiments, when only one through hole 171a is provided on the movement track 1712 and only the first side connection sub - part 11e121 is provided on the second connection part 11e12, only one safety cover through hole 11e511 is opened at the distal end of the safety cover 11e5, and the safety cover through hole 11e511 corresponds to the part of the through hole 171a in the second pipe section 1714. When the safety cover 11e5 is rotated by an external circumferential force until the safety cover through hole 11e511 and the part of the through hole 171a in the second pipe section 1714 are radially opposite, the first side connection sub - part 11e121 can slide in the through hole 171a under the action of an external force; when the safety cover 11e5 is rotated by an external circumferential force until the distal end of the safety cover 11e5 abuts against the first side connection sub - part 11e121, the safety cover 11e5 can lock the position of the first side connection sub - part 11e121.

[0112] However, when the two through holes 171a are provided on the movement track 1712, the second connection part 11e12 includes the first side connection sub - part 11e121 and the second side connection sub - part 11e122 as described above, and the two safety cover through holes 11e511 are provided on the safety cover 11e5, the operator can simultaneously apply axial forces to the first side connection sub - part 11e121 and the second side connection sub - part 11e122 to drive the intermediate tube connection structure 11e to move, so that both sides of the intermediate tube connection structure 11e are stressed simultaneously, thereby increasing the balance of the force on the intermediate tube connection structure 11e and making the movement of the intermediate tube 114 and the intermediate tube connection structure 11e more stable.

[0113] Please refer to Figure 8 and Figure 24 , the sheath assembly 11 further includes a connecting pipe joint 11f. The connecting pipe joint 11f includes a fixing ring 11f1, two sliders 11f2 and two connecting blocks 11f3. The fixing ring 11f1 is fixedly sleeved on the connecting pipe 116. The two sliders 11f2 are symmetrically distributed along the radial direction on both sides of the fixing ring 11f1 and are fixedly connected to the fixing ring 11f1. The two connecting blocks 11f3 are respectively connected to the two sliders 11f2 in one - to - one correspondence.

[0114] Please refer to Figure 10 , the connecting pipe 116 is located in the receiving cavity 1718 and is slidably sleeved on the intermediate tube 114. The fixing ring 11f1 is located in the receiving cavity 1718 and is connected to the connecting pipe 116. The two sliders 11f2 and the two connecting blocks 11f3 respectively extend out of the receiving cavity 1718 along the two track holes 1719. When the two connecting blocks 11f3 are driven by an external force, they can reciprocate along the track holes 1719, thereby driving the connecting pipe 116 and the outer sheath 115 to reciprocate axially.

[0115] Please refer to Figure 1 and Figure 10 , the handle mechanism 17 further includes a second handle 173. The second handle 173 is slidably mounted on the movement track 1712 and is linked with the outer sheath 115.

[0116] Specifically, please refer to Figure 10 , Figure 24 and Figure 25, the second handle 173 is connected to the connecting pipe joint 11f, and further linked to the outer sheath tube 115 through the connecting pipe joint 11f and the connecting pipe 116. The second handle 173 is cylindrical and has a central hole 1731 for the movement track 1712 to be inserted when connected to the movement track 1712. A first groove 1732 communicating with the central hole 1731 is provided on the inner wall of the second handle 173. The two sliders 11f2 are received in the first groove 1732 and fixedly connected to the groove wall of the first groove 1732. For example, the two sliders 11f2 are fixedly connected to the groove wall of the first groove 1732 by glue. A plurality of ribs 1733 (please refer to Figure 1 ) are provided on the outer surface of the second handle 173, which can increase the frictional force to facilitate the grasping and operation of the movement of the second handle 173.

[0117] When the implant 20 is delivered to the implant site through the conveyor 10, an operator applies a force to the second handle 173 to make the second handle 173 move axially along the movement track 1712, thereby driving the outer sheath tube 115 to move. When the first fitting 11a contacts the second fitting 11b and a blocking feeling is generated, the second handle 173 stops sliding. Since the movement stroke of the outer sheath tube 115 is consistent with the axial length of the released portion of the implant 20, by reasonably setting the positions of the first fitting 11a and the second fitting 11b, when the first fitting 11a and the second fitting 11b contact, the length of the released portion of the implant 20 is appropriate and not over-released. When the second handle 173 stops sliding, the position of the implant 20 can be observed. When it is found that the implant position of the implant 20 does not meet the expectation, the position of the implant 20 in the body can be adjusted to meet the expectation. After the position of the implant 20 is adjusted to meet the expectation, by increasing the force on the second handle 173, the first fitting 11a can move from one side of the second fitting 11b to the other side, so as to continue to release the implant 20 until the implant 20 is completely released.

[0118] One embodiment of the present disclosure further provides a delivery system, including the above-mentioned conveyor 10 and the implant 20. The implant 20 is releasably received in the lumen of the outer sheath tube 115 in a compressed state and radially constrained by the outer sheath tube 115 for facilitating delivery in a patient's body. In the loaded state, both the first mating member 11a and the second mating member 11b are located proximal to the implant 20. Among them, the first mating member 11a is provided on the outer sheath tube 115. The second mating member 11b is located proximal to the first mating member 11a and is provided on the handle housing 171. Specifically, the second mating member 11b is provided on the first handle 1711 or the movement track 1712. In an embodiment having the semi-release restraint member 1121, the axial distance between the first mating member 11a and the second mating member 11b is greater than the length of the implant 20 semi-releasedly restrained by the restraint sub-member 11212, and the axial distance between the first mating member 11a and the second mating member 11b is less than the length of the implant 20 when compressed in the outer sheath tube 115. In an embodiment without the semi-release restraint member 1121, the axial distance between the first mating member 11a and the second mating member 11b is 1 / 5 to 11 / 13 of the axial length of the implant 20 in the compressed state. In one embodiment, the axial distance between the first mating member 11a and the second mating member 11b is 8 / 11 to 10 / 13 of the axial length of the implant 20 in the compressed state. In another embodiment, the axial distance between the first mating member 11a and the second mating member 11b is 1 / 4 to 1 / 2 of the axial length of the implant 20 in the compressed state. In another embodiment, the axial distance between the first mating member 11a and the second mating member 11b is 3 / 10 to 7 / 10 of the axial length of the implant 20 in the compressed state.

[0119] By providing the mutually cooperating first mating member 11a and the second mating member 11b on the conveyor 10, it is possible to give an early warning of the release degree of the implant 20 and form a certain degree of blockage to the movement of the outer sheath tube 115, so as to better control the release speed of the outer sheath tube 115, so that during the release process, the release position of the implant 20 can be better observed and adjusted (if necessary).

[0120] Please refer to Figure 10 and Figure 26, in one embodiment, the conveyor 10 is used to convey the implant 20 to a target site with a branched body cavity. After the implant 20 is conveyed to the target site, the outer sheath tube 115 slides proximally relative to the first handle 1711 under an axial force to release the implant 20. When the first fitting 11a contacts the second fitting 11b, the distal end of the outer sheath tube 115 is located between the proximal end of the first corrugated ring 23 and the distal end of the second corrugated ring 24. Specifically, when the distal end of the outer sheath tube 115 is located on the first corrugated ring 23 when the first fitting 11a contacts the second fitting 11b, since the radial restraint of the outer sheath tube 115 on the second corrugated ring 24 has disappeared, the second corrugated ring 24 radially self-expands and drives the slit 211 to open into a mouth-like structure, and then a conveying path into the branched body cavity is established in the state where the slit 211 is open. During this process, since the first fitting 11a contacts the second fitting 11b and a blocking feeling is generated, the release process of the implant 20 can be warned, and it will not cause the slit 211 to close due to excessive release of the implant 20 and the conveying path of the branched body cavity cannot be established. Therefore, it is not necessary to re-insert the implant 20 into the lumen of the outer sheath tube 115 and release it again, thereby saving surgical time.

[0121] Therefore, by associating the positions of the first fitting 11a and the second fitting 11b of the conveyor 10 with the slit 211 of the implant 20, when the outer sheath tube 115 is retracted until the first fitting 11a contacts the second fitting 11b, the distal end of the outer sheath tube 115 is located between the proximal end of the first corrugated ring 23 and the distal end of the second corrugated ring 24, thereby warning the position of the outer sheath tube 115. When the outer sheath tube 115 is retracted until it is about to expose the slit 211, the retraction speed of the outer sheath tube 115 is slowed down, thereby controlling the position of the outer sheath tube 115 to keep the slit 211 in an open state. Or, when the outer sheath tube 115 is retracted until the first fitting 11a contacts the second fitting 11b, the slit 211 is just exposed, and the retraction speed of the outer sheath tube 115 is slowed down, thereby controlling the position of the outer sheath tube 115 to keep the slit 211 in an open state.

[0122] Understandably, when the first fitting 11a contacts the second fitting 11b, and the distal end of the outer sheath tube 115 is located distally of the first corrugated ring 23 and proximally of the distal end of the second corrugated ring 24, the delivery device 10 can accurately release the implant 20 (for example, by reducing the movement speed of the outer sheath tube 115 to accurately release the implant 20), causing the distal end of the outer sheath tube 115 to move onto the first corrugated ring 23, thereby radially squeezing the first corrugated ring 23. Since the radial restraint of the outer sheath tube 115 on the second corrugated ring 24 has disappeared, the second corrugated ring 24 radially self-expands and drives the slit 211 to open into a mouth-shaped structure, and then a delivery path into the branched body cavity is established in the state where the slit 211 is open. During this process, since the first fitting 11a contacts the second fitting 11b and a damping sensation is generated, it can give a warning for the release process of the implant 20, and it will not cause excessive release of the implant 20 (for example, the distal end of the outer sheath tube 115 is located proximally of the first corrugated ring 23) and make it difficult to keep the slit 211 in an open state, so that it is not necessary to reinsert the implant 20 into the lumen of the outer sheath tube 115 and release it again, thus saving surgical time.

[0123] After the delivery path into the branched body cavity is established, the acting force can be increased so that the first fitting 11a crosses the second fitting 11b, so that the outer sheath tube 115 can continue to release the implant 20 until the implant 20 is completely released.

[0124] Those skilled in the art can understand that "establishing a delivery path into the branched body cavity" means inserting a guide wire into the branched body cavity.

[0125] It should be noted that in the above delivery system, the delivery device 10 is used in cooperation with the implant 20 having the slit 211, and can give a warning for the position of the slit 211, so that the position of the outer sheath tube 115 can be better controlled to control the release state of the implant 20, so that when a branched path needs to be established, the slit 211 is controlled to be in an open state. However, the implant applicable to the delivery device 10 is not limited to the implant having the slit 211, nor is it limited to the implant applied to the part with branches. The delivery device 10 is applicable to the self-expanding implant of the lumen structure. Using the delivery device 10 to deliver and release the self-expanding implant of the lumen structure has good controllability, and can control the retraction speed of the outer sheath tube 115 to avoid excessive release of the implant before the release of the implant needs to be adjusted, so that the release position of the implant can be adjusted when necessary.

[0126] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0127] The above-disclosed is only the preferred embodiment of the present invention, and of course, it cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A transporter for transporting an implant, characterized in that, the transporter includes a sheath assembly, a handle mechanism, a first fitting and a second fitting. The handle mechanism includes a handle housing. The sheath assembly includes an outer sheath. The outer sheath is slidably connected to the handle housing. The first fitting is disposed on the outer sheath. The second fitting is disposed on the handle housing. The implant is releasably received in the lumen of the outer sheath in a compressed state and is radially constrained by the outer sheath. Axial sliding of the outer sheath relative to the handle housing proximally can cancel the radial constraint on the implant. During the process of axial sliding of the outer sheath relative to the handle housing proximally to cancel the radial constraint, the first fitting is driven into contact with the second fitting, causing the second fitting to form a block to the movement of the outer sheath, but the first fitting can cross over the second fitting to enable the outer sheath to continue to slide axially proximally.

2. The transporter according to claim 1, characterized in that, both the first fitting and the second fitting are annular structures. The first fitting and the second fitting are coaxially arranged. The first fitting is sleeved on the outer sheath. The second fitting surrounds the longitudinal central axis of the handle housing, and the inner diameter of the second fitting is smaller than the outer diameter of the first fitting.

3. The transporter according to claim 1, characterized in that, the sheath assembly further includes a connecting tube. The distal end of the connecting tube is sleeved on the proximal end of the outer sheath. A recessed groove is provided on the outer wall of the connecting tube. The opening of the recessed groove is radially outward. A part of the first fitting is received in the recessed groove, and another part of the first fitting protrudes out of the recessed groove. The second fitting is disposed on the inner wall of the handle housing.

4. The transporter according to claim 3, characterized in that, there are multiple recessed grooves and multiple first fittings. The multiple recessed grooves correspond to the multiple first fittings one by one. The second fitting is one or more; or, there are multiple recessed grooves and one first fitting. The first fitting can be installed in any one of the recessed grooves, or there is one recessed groove and one first fitting; and the second fitting is one or more.

5. The transporter according to claim 1, characterized in that, the sheath assembly further includes a sheath core. The sheath core penetrates through the outer sheath, and the proximal end of the sheath core is rotatably connected to the proximal end of the handle housing. A semi-release restraint member is provided on the distal end of the sheath core for semi-releasing the restraint on the implant. When the sheath core rotates relative to the handle housing, the axial length of the semi-release restraint member shortens to release the restraint on the implant.

6. The transporter according to claim 5, characterized in that, The sheath tube assembly further includes a sheath core connection structure, which includes a sheath core connection part and a baffle connected to the sheath core connection part. The sheath core connection part is fixedly connected to the sheath core. The handle mechanism further includes a knob, which is rotatably sleeved on the handle housing, and the knob is connected to the baffle. The rotation of the knob relative to the handle housing can drive the sheath core to rotate circumferentially relative to the handle housing.

7. The transporter according to claim 5, wherein, the sheath tube assembly further includes a mounting tube and an intermediate tube. The mounting tube is sleeved on the sheath core, and the intermediate tube is axially slidably sleeved on the mounting tube. The distal end of the mounting tube is provided with a mounting structure for detachably connecting the implant. The distal end of the intermediate tube is provided with a plurality of locking rods. The axial sliding of the intermediate tube relative to the mounting tube causes the locking rods to switch between positions of being locked in cooperation with the mounting structure and being unlocked from the mounting structure, so as to lock the implant or release the implant.

8. The transporter according to claim 7, wherein, the handle housing includes a first handle, a movement track connected to the first handle, and a second handle slidably sleeved on the movement track. The second fitting is provided on the first handle or the movement track. The second handle is connected to the outer sheath tube. The movement of the second handle along the movement track drives the outer sheath tube to axially slide proximally so that the first fitting contacts the second fitting, and the first fitting can cross over the second fitting to enable the outer sheath tube to continue to axially slide proximally.

9. The transporter according to claim 7, wherein, the handle housing includes a first handle and a movement track connected to the first handle. The movement track has a track cavity, and a through hole communicating with the track cavity is formed on the movement track. The sheath tube assembly further includes an intermediate tube connection structure, which includes a first connection part and a second connection part. The first connection part is received in the track cavity and is connected to the proximal end of the intermediate tube. The second connection part includes a first side connection sub-part connected to the first connection part. The first side connection sub-part extends radially from the end connected to the first connection part, and the first side connection sub-part passes through the through hole and can axially move along the through hole to drive the locking rods to switch between positions of being locked in cooperation with the mounting structure and being unlocked from the mounting structure.

10. The transporter according to claim 9, wherein, the intermediate tube connection structure further includes a safety cover. A safety cover through hole is formed at the distal end of the safety cover. The safety cover is rotatably sleeved on the movement track. When the safety cover rotates relative to the movement track, the distal end of the safety cover abuts against the first side connection sub-part, or the safety cover through hole is radially opposite to a part of the proximal end of the through hole.

11. The transporter according to claim 10, wherein, A rib extending circumferentially is provided on the outer surface of the movement track. A guide rail structure corresponding to the rib is formed on the safety cover. The rib is received in the guide rail structure and can slide circumferentially relative to the guide rail structure, so that a part of the proximal end of the safety cover through hole and the through hole are radially offset, so that the distal end of the safety cover abuts against the first side connection sub - part, or the safety cover through hole and a part of the proximal end of the through hole are radially opposite.

12. The conveyor according to claim 11, wherein, a limiting protrusion is provided at the distal end of the rib. A pit corresponding to the limiting protrusion is formed on the guide rail structure. When the distal end of the safety cover abuts against the first side connection sub - part, the limiting protrusion sinks into the pit, but the limiting protrusion can move out of the pit.

13. The conveyor according to claim 7, wherein, the sheath tube assembly further includes an installation tube connection structure. The installation tube connection structure includes a locking part and a lock head. The locking part includes a threaded tube and a limiting ring connected to the proximal end of the threaded tube. The limiting ring is connected to the inner wall of the handle housing. A threaded hole is provided on the threaded tube. The lock head includes a lock plate and a screw rod connected to the proximal end of the lock plate. A through slot is provided on the lock head. The through slot penetrates through the lock plate and the screw rod. The installation tube is received in the through slot and fixedly connected to the lock head. The screw rod is inserted into the threaded tube and connected to the threaded tube.

14. A delivery system, wherein, comprising an implant and a conveyor according to any one of claims 1 to 13. The implant is releasably received in the lumen of the outer sheath tube in a compressed state and is radially constrained by the outer sheath tube. Axial sliding of the outer sheath tube relative to the handle housing proximally can cancel the radial constraint on the implant; and, the axial distance between the first fitting and the second fitting is 1 / 5 to 11 / 13 of the axial length of the implant in the compressed state.

15. The delivery system according to claim 14, wherein, the implant includes a flow - blocking membrane and a plurality of wave rings arranged axially. The flow - blocking membrane is arranged on the plurality of wave rings to form a lumen structure with openings at both ends. Among the plurality of wave rings, there are an axially adjacent first wave ring and a second wave ring. The second wave ring is located on the distal side of the first wave ring. A circumferentially extending slit is provided on the flow - blocking membrane. The circumference where the slit is located intersects with the first wave ring. When the first fitting contacts the second fitting, the distal end of the outer sheath tube is located between the proximal end of the first wave ring and the distal end of the second wave ring.

16. The delivery system according to claim 15, wherein, when the first fitting contacts the second fitting, the distal end of the outer sheath tube is located on the first wave ring, and the part where the slit of the flow - blocking membrane is located is still inside the outer sheath tube.

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