Conveying device and conveying system

Abstract

The conveying device comprises a sheath tube, the sheath tube comprises an outer tube and an inner tube, the outer tube comprises an inclined part and a main body part which are sequentially distributed from the far end to the near end, and the outer diameter and the inner diameter of the far end of the inclined part are larger than the inner diameter and the outer diameter of the main body part respectively; the outer tube comprises a cavity crossing the inclined part and the main body part and a supporting body capable of moving in the cavity, the supporting body can drive the inner wall of the cavity to deform so as to drive the inclined part to deform or deflect, and the size and angle of the far-end side of the outer tube are changed through different movement positions of the supporting body, so that release stability is guaranteed, and the service life of the outer tube is prolonged. And meanwhile, the loading convenience is also improved.

Description

Technical Field

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

[0002] Interventional therapy is a technique for minimally invasive treatment of diseases through instruments such as catheters under the guidance of medical imaging equipment. The delivery of the load during interventional therapy is one of the key steps. Taking a conventional stent as an example, generally, a small incision is made at the puncture site of the patient, and then the sheath tube is reached at the lesion position of the human body with the help of a delivery device. Then, by withdrawing the outer tube, the inner tube remains stationary, and the stent is released, so that the stent is implanted at the predetermined position. When most of the stent is exposed and expanded to the blood vessel size, the remaining small part that is not exposed, or the last tail still between the outer tube and the inner tube has a large diameter difference from the already released part, and it is easy to be directly released by the already expanded part, and this process is prone to cause the stent to jump and displace. Therefore, the release judgment of the ordinary sheath tube design has relatively high risks. Summary of the Invention

[0003] Based on this, it is necessary to provide an improved delivery device and a delivery system for the problems existing in the existing delivery device, specifically as follows:

[0004] A delivery device is provided, including a sheath tube, the sheath tube includes an outer tube and an inner tube, and is characterized in that the outer tube includes an inclined portion and a main body portion sequentially distributed from the distal end to the proximal end, the outer diameter and the inner diameter of the distal end of the inclined portion are respectively greater than the inner diameter and the outer diameter of the main body portion, the outer tube includes a cavity passing through the inclined portion and the main body portion and a support body capable of moving in the cavity, and the support body can drive the inner wall of the cavity to deform so as to drive the inclined portion to deform or deflect.

[0005] In one embodiment, the outer tube includes a first state and a second state, and when the support body moves from the farthest distal end of the cavity to the proximal end, the outer tube turns from the second state to the first state.

[0006] In one embodiment, the inner diameter of the distal side of the outer tube in the first state is greater than the inner diameter in the second state.

[0007] In one embodiment, the outer diameter of the distal side of the outer tube in the first state is greater than the outer diameter in the second state.

[0008] In one embodiment, the inclined portion extends gradually from the proximal end to the distal end toward the side away from the axis (outer side) in the first state.

[0009] In one embodiment, the axial length of the support body is greater than the axial length of the inclined portion.

[0010] In one embodiment, the inclined portion and the main body portion are integrally formed. When the support body drives the inclined portion to deform, the connection position between the inclined portion and the main body portion bulges inward.

[0011] In one embodiment, the inclined portion is rotatably connected to the main body portion. When the support body moves to the distal side of the cavity, the distal end of the inclined portion rotates from the side away from the axis to a direction tending to be axial or along the axis.

[0012] A delivery system is further provided, including the delivery device as described in any one of the above, and further including a stent. The proximal end of the stent extends into the opening between the inclined portion and the inner tube for loading.

[0013] In one embodiment, after the stent is released, the support body moves to the distal side of the cavity, and the distal end of the inclined portion rotates from the side away from the axis to a direction tending to be axial or along the axis.

[0014] Compared with the prior art, the present invention provides a delivery device and a delivery system, including a sheath tube. The sheath tube includes an outer tube and an inner tube. The outer tube includes an inclined portion and a main body portion sequentially distributed from the distal end to the proximal end. The outer diameter and inner diameter of the distal end of the inclined portion are respectively greater than the inner diameter and outer diameter of the main body portion. The outer tube includes a cavity passing through the inclined portion and the main body portion and a support body capable of moving in the cavity. The support body can drive the inner wall of the cavity to deform to drive the inclined portion to deform or deflect. By different movement positions of the support body, the size and angle of the distal side of the outer tube are changed, thereby ensuring the stability of release and improving the convenience of loading at the same time. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the delivery device from the first perspective in Embodiment 1 of the present invention

[0016] Figure 2 is a schematic structural diagram of the delivery state of the distal part of the sheath tube of the delivery device in Embodiment 1 of the present invention;

[0017] Figure 3 is a schematic structural diagram of the first state of the distal part of the sheath tube of the delivery device in Embodiment 1 of the present invention;

[0018] Figure 4 is a schematic structural diagram of the second state of the distal part of the sheath tube of the delivery device in Embodiment 1 of the present invention;

[0019] Figure 5Schematic diagram of the state where the distal part of the sheath tube of the conveying device in Embodiment 1 of the present invention loads or releases the stent;

[0020] Figure 6 It is along Figure 1 Schematic cross-sectional view in the A-A direction in;

[0021] Figure 7 Schematic structural view of the second perspective of the conveying device in Embodiment 1 of the present invention;

[0022] Figure 8 It is along Figure 7 Schematic cross-sectional view in the B-B direction in;

[0023] Figure 9 Schematic working view of the conveying device in Embodiment 1 of the present invention;

[0024] Figure 10 It is Figure 9 Enlarged schematic view of area C in;

[0025] Figure 11 Schematic working view of the conveying device in Embodiment 2 of the present invention;

[0026] Figure 12 It is Figure 11 Enlarged schematic view of area D in;

[0027] Figure 13 Schematic working view of the conveying device in Embodiment 3 of the present invention;

[0028] Figure 14 It is Figure 13 Enlarged schematic view of area E in. Detailed implementation manners

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that in the field of interventional medical devices, generally, the end of the medical device implanted in 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 conveyed, and the "radial direction" generally refers to the direction perpendicular 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 "connection" mentioned in the embodiments includes the cases where two components are directly connected and where they are indirectly connected through other components.

[0031] The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments.

[0032] Embodiment 1

[0033] Referring to the attached Figures 1-5 , Figure 1 is a schematic structural diagram of the first perspective of the delivery device in Embodiment 1 of the present invention; Figure 2 is a schematic structural diagram of the delivery state of the distal portion of the sheath tube of the delivery device in Embodiment 1 of the present invention; Figure 3 is a schematic structural diagram of the first state of the distal portion of the sheath tube of the delivery device in Embodiment 1 of the present invention;

[0034] Figure 4 is a schematic structural diagram of the second state of the distal portion of the sheath tube of the delivery device in Embodiment 1 of the present invention; Figure 5 is a schematic diagram of the state of loading or releasing the stent of the distal portion of the sheath tube of the delivery device in Embodiment 1 of the present invention; The delivery device 10 provided in Embodiment 1 includes a handle 100 and a sheath tube 200. The sheath tube 200 includes an outer tube 210, an inner tube 220, and a TIP head 230. The inner tube 220 and the outer tube 210 are tubular structures. The inner tube 220 and the outer tube 210 are connected to different positions on the handle 100. By operating the handle 100, the relative axial displacement of the outer tube 210 and the inner tube 220 can be achieved. The stent 300 to be delivered is installed on the proximal side of the TIP head 230 and is located in the middle of the sandwich between the inner tube 220 and the outer tube 210. The stent 300 is pressed by the outer tube 210 against the outer wall of the inner tube 220. Before release, the TIP head 230 restricts the axial position of the stent 300. When released, the position of the inner tube 220 remains unchanged, and the outer tube 210 moves toward the proximal direction, so that the outer restriction of the stent 300 disappears, and the stent 300 expands to achieve implantation.

[0035] For the existing release process, when the distal end of the sheath tube 200 reaches the release position, the inner tube 220 remains in place, and the outer tube 210 withdraws a certain distance toward the proximal direction, thereby releasing the stent 300. In this embodiment, for the stent 300, as Figure 2 shown, the stent 300 is installed on the proximal side of the TIP head 230 and is located in the middle of the sandwich between the inner tube 220 and the outer tube 210. The stent 300 is pressed by the outer tube 210 against the outer wall of the inner tube 220. At this time, the stent 300 is in a pre-loaded state.

[0036] In this embodiment, for the outer tube 210, the outer tube 210 as a whole includes an inclined portion 310 and a main body portion 320 that are sequentially distributed from the distal end to the proximal end. In this embodiment, the inclined portion 310 and the main body portion 320 are continuous. The main body portion 320 extends substantially horizontally along the axis. However, the inclined portion 310 starts from the distal end of the main body portion 320, inclines towards the side away from the axis and extends towards the distal end, so that the distal end of the outer tube 210 is in an outward-expanded state in the natural state. The outer diameter and inner diameter of the distal end of the inclined portion 310 are respectively greater than the outer diameter and inner diameter of the main body portion 320.

[0037] The outer tube 210 includes a cavity 311 closed at the distal end. The cavity 311 extends axially and spans both the inclined portion 310 and the main body portion 320.

[0038] Refer to Figures 3-4 , the outer tube 210 includes an axially movable support body 312. The support body 312 extends axially and is inserted into the cavity 311. The support body 312 is rigid, and the inner wall of the cavity 311 is flexible. The support body 312 forms a support for the cavity 311.

[0039] In this embodiment, the support body 312 extends in a straight line. Thus, when the support body 312 passes through the main body portion 320 from the proximal end and reaches the position of the inclined portion 310, the supporting force of the support body 312 will gradually drive the inclined portion 310 to deflect towards the axial direction to the axial direction, thereby reducing the outer diameter and inner diameter of the inclined portion 310 in deformation as a whole. Therefore, in this embodiment, the outer tube 210 includes a first state and a second state. In the first state, the inclined portion 310 and the main body portion 320 are in the natural state, and the inclined portion 310 presents a flared shape. In the second state, both the outer diameter and inner diameter of the inclined portion 310 are reduced, that is, a reduced opening is formed relative to the original flared state. Finally, the extension trends of the inclined portion 310 and the main body portion 320 gradually become the same as a whole, that is, the extension direction of the inner wall of the inclined portion 310 also tends to be axial or parallel to the axial direction. Therefore, the support body 312 drives the inner wall of the cavity 311 to deform, thereby driving the inclined portion 310 to deflect or deform.

[0040] Overall, the inner diameter of the distal end side of the outer tube 210 in the first state is greater than the inner diameter in the second state; the outer diameter of the distal end side of the outer tube 210 in the first state is greater than the outer diameter in the second state;

[0041] In this embodiment, the inclined portion 310 extends gradually from the proximal end to the distal end towards the side away from the axis (outer side) in the first state.

[0042] In another embodiment, in the second state of the outer tube 210, the outer diameter and inner diameter of the inclined portion 310 are still greater than those of the main body portion 320, but a normal conveying process can be completed.

[0043] Combined with Figure 5For the bracket 300, the cooperation between the inclined portion 310 and the support body 312 has a special effect on the preloading and release process of the bracket 300, as follows:

[0044] When the stent 300 is preloaded, it is necessary to ensure that the stent 300 is compressed and inserted between the outer tube 210 and the inner tube 220, and the distal end of the stent 300 is mounted to the position of the TIP head 230 (since the TIP head 230 part is not improved in this embodiment, no further introduction is made to this, and the connection relationship between the stent 300 and the TIP head 230 is omitted in the figure). In the prior art, the proximal side of the stent 300 needs to be gradually inserted between the outer tube 210 and the inner tube 220 in sequence, and the steps are cumbersome and complicated, especially when operating the proximal end of the stent 300. Difficult; using the sheath 200 provided in this embodiment, first withdraw the support body 312 toward the proximal end to make it out of the area of ​​the inclined portion 310, so that the inclined portion 310 is expanded. At this time, a trumpet mouth is formed between the outer tube 210 and the inner tube 220, so as to facilitate the loading of the nearest end of the stent 300. After the stent 300 is partially inserted, the support body 312 can be pushed toward the distal end to gradually fill the cavity 311 corresponding to the inclined portion 310 area, thereby gradually compressing the expansion of the inclined portion 310, cooperating with the gradual filling of the stent 300, so that the stent 300 can be loaded smoothly.

[0045] In another embodiment, after the stent 300 is partially placed inside the outer tube 210, the support body 312 can be directly pushed to the farthest end, so that the outer tube 210 and the inner tube 220 form the state in the prior art, but the proximal side of the stent 300 that is most difficult to load has been loaded, which also greatly improves the loading convenience of the stent 300.

[0046] In this embodiment, after the stent 300 is preloaded and before the release stage, the support body 312 is always located at the distal end, that is, the support body 312 crosses the cavity 311 in the area where the inclined portion 310 is located.

[0047] When the stent 300 needs to be released, the prior art is to gradually withdraw the outer tube 210 toward the proximal end to achieve the release. However, when most of the stent 300 is exposed and expanded to the size of the blood vessel, the remaining unexposed small part, or the tail part that is still between the outer tube 210 and the inner tube 220, has a large diameter difference with the released partial area, and is easily brought out by the expanded part and released directly. This process easily causes the stent 300 to jump and cause displacement. For this embodiment, at a predetermined position, the support body 312 of the outer tube 210 first starts to move toward the proximal end to release the restriction on the inclined portion 310, so that the distal end of the outer tube 210 is flared. As the outer tube 210 is gradually transported toward the proximal end, when the stent 300 is released, part of the stent 300 expands and presses against the inner surface of the inclined portion 310. As the outer tube 210 continues to be withdrawn, it is gradually released into the blood vessel, which is equivalent to semi-releasing a part of the stent 300. That is, when most of the stent 300 is exposed and expanded to the size of the blood vessel, the remaining unexposed small part, or the tail part that is still between the outer tube 210 and the inner tube 220, is between the inclined portion 310 and the inner tube 220. Because the inner diameter of the inclined portion 310 is gradually changed, on the one hand, the inclined portion 310 acts as a bell mouth to guide, and on the other hand, a part of the stent 300 that is not fully released in the area of ​​the inclined portion 310 also expands to a certain size and then abuts against the inclined portion 31. The diameter difference between the unreleased area and the released area of ​​the stent 300 is small, and the force to restore the shape is also small, which reduces or even avoids the risk of the stent 300 popping out and shifting. In this embodiment, preferably, the deflection angle of the inclined portion 310 relative to the axis in the first state is between 35° and 70° to obtain the best release stability.

[0048] In addition, it should be noted that when the release is completed and the sheath 200 needs to be withdrawn, the support body 312 moves to the distal end of the cavity 311, so that the inclined portion 310 is deformed or deflected to achieve shrinkage of the distal end of the sheath 200, so that the sheath 200 can be smoothly withdrawn.

[0049] It should be particularly noted that when the inclined portion 310 and the main body portion 320 are integrally formed, if no special avoidance grooves or other spaces are designed, when the support body 312 is advanced to the distal side, since the inclined portion 310 deforms from the outside to the inside, part of the deformation occurs on the inner side of the inclined portion 310 and moves towards the inside, thus squeezing each other to form a protrusion towards the axis. In other words, when the support body 312 is advanced from the proximal side to the distal side, the outer tube 210 changes from the first state to the second state, and the inner side of the inclined portion 310 changes from a slope surface to a horizontal surface. Since the deformation is formed by the extrusion of the support body 312 along the side, the inner inclined surfaces of the inclined portion 310 are squeezed and deformed with each other, and the maximum deformation occurs at the connection between the inclined portion 310 and the main body portion 320 (where the angle to be deformed is the largest). The deformation generates one or more protrusions, and this area is exactly the position where the stent 300 is loaded. When the stent 300 is loaded, it is exactly in the interlayer between the inner tube and the outer tube 210. Therefore, the protrusions formed by the deformation of the outer tube 210 caused by the support body 312 just abut against the stent from the outside to the inside (or the protrusions are stuck into the spaces between the wires of the stent 300 to limit the position of the stent 300), increasing the limiting effect on the stent 300.

[0050] However, in other embodiments, if the connection between the inclined portion 31 and the main body portion 320 is partially cut in advance, that is, a margin for deformation is left, the above-mentioned limiting effect will be lost, but it is more conducive to the rotation of the inclined portion 310 and makes the outer tube 210 smoother and flatter in the second state.

[0051] In another embodiment, the support body 312 can be a nickel-titanium alloy braided or cut network tube structure.

[0052] In another embodiment, the cross-section of the support body 312 includes a sector ring or multiple separated sector rings, that is, the support body 312 can be set not to be a complete cylinder, as long as it can support the outer tube 210 from multiple angles.

[0053] In another implementation, the cavity 311 can extend in a threaded manner, and the corresponding support body 312 can also extend along the shape matching the cavity 311.

[0054] In another embodiment, the support body 312 can be in the shape of a rod or a cylinder. The support body 312 can either axially extend all the way to the proximal side of the outer tube 210 or be set to control the axial position through a connecting rod or a connecting wire.

[0055] However, whether in this embodiment or other embodiments, in order to achieve the optimal effect, the axial length of the support body 312 is preferably greater than the length of the inclined portion 310 to ensure that the support body 312 can form a complete support for the inclined portion 310.

[0056] In another embodiment, the inclined portion 310 is rotatably connected to the main body portion 320. When the support 312 moves to the distal side of the cavity 311, the distal end of the inclined portion 310 rotates from the side away from the axis to a direction tending to be axial or along the axis, and finally reaches a state parallel to the axis or extending along the axis.

[0057] This embodiment also brings other technical effects. In combination with the accompanying drawings of the specification Figure 1 and Figures 6-8 , Figure 1 FIG. 10 is a schematic structural diagram of the conveying device 10 in the first perspective of Embodiment 1 of the present invention; Figure 6 is a cross-sectional schematic diagram taken along the Figure 1 A-A direction in FIG. 10; Figure 7 FIG. 16 is a schematic structural diagram of the conveying device 10 in the second perspective of Embodiment 1 of the present invention; Figure 4 is a cross-sectional schematic diagram taken along the Figure 3 B-B direction in FIG. 16. The handle 100 includes a housing 110, on which a knob 120 and a protection button 130 are provided. A protective sleeve 240 is covered at the junction of the housing 110 and the outer tube 210. The protective sleeve 240 is made of a relatively soft material such as silica gel. The protective sleeve 240 can prevent the junction of the outer tube 210 and the housing 110 from being bent, and maintain the normal conveying effect of the outer tube 210. The knob 120 is used to drive the relative movement of the outer tube 210 and the inner tube 220, so that the outer tube 210 moves toward the distal end or the proximal end, and the protection button 130 is used to lock and unlock the knob 120.

[0058] For the handle 100, a connection seat 211 fixedly connected to the outer tube 210 and an axially rotatable inner plate 140 are provided inside the housing 110. The connection seat 211 is movably connected to the inner plate 140. The inner side of the inner plate 140 presents a threaded groove structure. At this time, the outer tube 210 is fixedly connected to the connection seat 211. The connection seat 211 includes at least one protrusion 212 facing outward (in this embodiment, outward refers to the direction away from the axis relative to the axis). The protrusion 212 is snapped into the threaded groove on the inner side of the inner plate 140 and can move along the threaded groove. The knob 120 is sleeved and fixed on the outer side of the inner plate 140 (the two can be integrally formed). In this embodiment, the part of the inner plate 140 exposed outside the housing 110 is the knob 120 that can be controlled by the operator. Therefore, when the knob 120 is rotated by the operator, the inner plate 140 is driven to rotate. Both the inner plate 140 and the knob 120 are axially limited by the housing 110, so that the inner plate 140 can only rotate around the axis. When the inner plate 140 rotates, relative movement occurs between the inner plate 140 and the connection seat 211. Due to the threaded connection between the inner plate 140 and the connection seat 211, the rotation of the inner plate 140 forces the connection seat 211 to move axially, thereby driving the outer tube 210 to move axially, and further realizing the relative axial displacement between the outer tube 210 and the inner tube 220 to cooperate with the subsequent release process of the bracket 300.

[0059] In another embodiment, an external thread or other similar threaded structure can be selected for the inner side of the inner plate 140, and a threaded groove or other similar structure that can cooperate with the inner plate 140 is provided on the corresponding connection seat 211. Therefore, a first thread mating portion is provided on the inner wall of the inner plate 140, and at least one second thread mating portion is included on the outer side of the connection seat 211 facing the inner plate 140. The second thread mating portion can cooperate with the first thread mating portion and perform relative sliding, that is, the connection seat 211 can perform relative movement relative to the inner plate 140.

[0060] In another embodiment, in order to further prevent the excessive friction between the protrusion 212 of the connection seat 211 and the threaded groove of the inner plate 140 from driving the connection seat 211 to rotate and driving the outer tube 210 to rotate, a convex rib extending axially is provided on the proximal side of the outer tube 210 and is snapped into the distal side of the housing 110.

[0061] In this embodiment, a limiting portion 150 is sleeved outside the connecting seat 211. The limiting portion 150 is fixed on the housing 110 and located inside the inner plate 140. At least one axially extending slot is formed in the limiting portion 150 to allow the protrusion 212 of the connecting seat 211 to pass through. The slot can limit the circumferential movement of the protrusion 212. When the knob 120 drives the inner plate 140 to rotate, the protrusion 212 moves relative to the inner plate 140 and is restricted by the limiting portion 150 to move horizontally along the axis, thereby driving the connecting seat 211 to move horizontally. In addition to restricting the movement direction of the protrusion 212, at least one sound - generating area 151 is distributed on the inner wall of the limiting portion 150. The sound - generating area 151 includes a plurality of teeth arranged in sequence along the axis to form a rack - shaped sound - generating structure.

[0062] In this embodiment, the connecting seat 211 extends out a spring piece 213. One side of the spring piece 213 is fixed at the central part of the connecting seat 211, and the other side is a free end. The spring piece 213 abuts against the inner wall of the limiting portion 150. The spring piece 213 makes a sound when passing through the sound - generating area 151. That is to say, the spring piece 213 can slide along the inner wall of the limiting portion 150. In order not to affect the linear movement realized by the protrusion 212, the spring piece 213 and the protrusion 212 are located at different circumferential positions, so that they can realize their functions relatively independently.

[0063] In this embodiment, the extending direction of the spring piece 213 preferably faces the proximal side. This is because in the release stage, the outer tube 210 needs to move towards the proximal side. The free end of the spring piece 213 preferably facing the proximal side can reduce the friction force and facilitate the movement of the spring piece 213.

[0064] When the elastic piece 213 passes through the sound - generating area 151, it will produce a sound, which is conducive to the operator determining the current state. In the prior art, when this conveying device is released, it needs to go through four stages: the preparation stage, the slow - release stage, the fast - release stage, and the full - release stage. The distinction between each stage depends on the operator observing the in - vivo and in - vitro length markings (some conveying devices do not have in - vitro markings). However, this is judged solely by vision. When the operator is affected by the outside world, such as light, fatigue, resulting in blocked or deviated vision, or misalignment due to the observation angle, the operator cannot make an accurate judgment. In addition, since when the release is in the final stage, once the stent 300 crosses the recoverable critical point, the risk of recovery is relatively high, that is, the stent 300 cannot be recovered and adjusted in position, etc. Relying solely on visual judgment for the judgment of the release stage has a relatively high risk. The cooperation of the elastic piece 213 and the sound - generating area 151 in this embodiment solves the above problems. In addition to the existing visual judgment, it can also be assisted by sound judgment. That is to say, when reaching the sensitive stage or a preset stage, the elastic piece 213 passes through the sound - generating area 151, and at this time, the conveying device will emit a sound for prompting. Different prompting sounds can also be emitted according to different stages, and no power supply and sensors are required, with high reliability.

[0065] The conveying device of this embodiment can feedback different sounds according to different stages during the release stage. Specifically, multiple sound - generating areas 151 are set (or the distribution of the teeth of the sound - generating area 151 is changed). The heights and density degrees of the racks of different sound - generating areas 151 are different to obtain different sound combinations. The denser the tooth distribution, the higher the sound frequency generated, and in the external manifestation, the higher the pitch of the sound. The higher the height of the teeth, the greater the loudness of the sound generated. For this embodiment, the higher the degree of the outer tube 210 moving towards the proximal end, the closer it is to the full release of the stent 300. Therefore, for the selection of the distribution of multiple sound - generating areas 151, the closer to the proximal end, the denser the tooth distribution and the higher the height of the teeth of the sound - generating area 151 in this embodiment. That is to say, in this embodiment, the tooth density and average tooth height of the sound - generating area at the nearest - end position (or the nearest - end area of the sound - generating area) are greater than those of the sound - generating area at the farthest - end position (or the farthest - end area of the sound - generating area); in another embodiment, the tooth density and / or average tooth height of the sound - generating area at the nearest - end position (or the nearest - end area of the sound - generating area) are greater than those of the sound - generating area at the farthest - end position (or the farthest - end area of the sound - generating area).

[0066] When other conditions remain unchanged, by changing the density of the teeth distribution in the sound - generating area 151 (the spacing distance between adjacent teeth), that is, changing the number of teeth per unit distance of the path, the pitch of the sound can be changed. The more teeth per unit distance, the more times the elastic sheet 213 vibrates, the higher the vibration frequency, and the higher the pitch sounds. That is, the sound gives people the feeling of being higher, sharper and more rapid. The fewer teeth per unit distance, the fewer times the elastic sheet 213 vibrates, the lower the vibration frequency, and the lower the pitch sounds. The sound gives people the feeling of being lower and duller.

[0067] When other conditions remain unchanged, by changing the height of the teeth in the sound - generating area 151, the loudness of the sound can be changed. When the teeth are higher, the travel of the elastic sheet 213 from the top to the bottom of the teeth is longer, the maximum rebound speed is faster, the force is stronger, and the generated sound is louder and more powerful. When the teeth are lower, the travel of the elastic sheet 213 from the top to the bottom of the teeth is shorter, the maximum rebound speed is slower, the force is smaller, and the generated sound is weaker and softer.

[0068] In addition, when other conditions remain unchanged, by combining the tooth shapes of multiple or single sound - generating areas 151, the combination of sounds can be changed. For example, the straight - type tooth groove is characterized in that the tooth groove is in a straight - line shape, making the vibration of the elastic sheet present a uniform frequency and volume, producing a clear and bright sound effect. The wave - type tooth groove is characterized by a wavy concave - convex design, making the frequency and volume changes generated when the elastic sheet vibrates more diverse, creating a soft sound effect. The V - type tooth groove is characterized by a sharp V - shaped design, making the sound generated when the elastic sheet vibrates more stimulating and penetrating. The combination of various shape distributions can achieve changes in sound segments.

[0069] In another embodiment, it is not necessary to set a corresponding inner plate 140 inside the handle 100 to achieve the axial movement of the outer tube 210 through threaded connection. It can be directly pushed by setting a push rod at the distal end of the handle 100, or various transmission forms such as the meshing of gears and racks can be used. As long as it is satisfied that the outer tube 210 can have an axial displacement through the connecting seat 211 connected to it. Under the alternative solution, the contact between the connecting seat 211 and the sound - generating area 151 of the limiting part 150 can still produce sound, achieving the same technical effect.

[0070] In another embodiment, the handle 100 can control the axial movement of the inner tube 220. The inner tube 220 can adopt a setting corresponding to the outer tube 210 in this embodiment, and the sound - generating effect can also be achieved. In other embodiments, the outer tube 210 and the inner tube 220 can both be set with sound - generating effects.

[0071] The handle includes a housing and a connecting seat disposed inside the housing. The connecting seat is connected to the tubular body, and the connecting seat can drive the tubular body to move axially relative to the housing. A limiting portion is provided inside the housing, and several sound - generating regions are provided on the inner wall of the limiting portion. The sound - generating regions include a plurality of teeth arranged in sequence along the axial direction; the connecting seat further includes an elastic piece extending from the inside to the outside, and the free end of the elastic piece can abut against and slide along the sound - generating region under the drive of the connecting seat

[0072] In this embodiment, in addition to the sound - prompting function, the design of the elastic piece 213 also has an additional locking effect. For details, refer to Figures 9-10 , Figure 9 is a working schematic diagram of the conveying device in Embodiment 1 of the present invention; Figure 10 is Figure 9 an enlarged schematic diagram of Region C in Figure 9 is a simplified diagram after simplifying other structures in the cross - sectional schematic diagram of this embodiment, aiming to show its working principle and not representing that other unshown components need to be omitted.

[0073] In this embodiment, on the path where the sound - generating region 151 extends along the axial direction, the limiting portion 150 includes at least one circumferentially - extending limiting groove 152 distributed at intervals, and the width of the limiting groove 152 is greater than the width of the free end of the elastic piece 213. When the free end of the elastic piece 213 reaches the position of the limiting groove 152, the elastic piece 213 naturally rebounds, and the free end of the elastic piece 213 snaps into the limiting groove 152, thereby realizing the clamping connection between the elastic piece 213 and the limiting portion 150. Subsequently, the connecting seat 211 is limited on the limiting portion 150, and then the outer tube 210 is fixed relative to the housing 110, that is, the relative position between the outer tube 210 and the inner tube 220 is locked.

[0074] In this embodiment, in order to limit the elastic piece 213 as much as possible, the limiting groove 152 penetrates the limiting portion 150.

[0075] In this embodiment, along the axial direction, the limiting portion 150 includes a plurality of limiting grooves 152. When the elastic piece 213 reaches the first limiting groove 152 distributed from the distal end to the proximal end, it corresponds to the end point of the preparation stage of the release stage, and the subsequent limiting grooves 152 respectively correspond to the end points of different release stages.

[0076] In another embodiment, a certain stage can also be split into more sub - stages to obtain a more stable release - process operation.

[0077] In this embodiment, a clamping member 153 is provided outside the corresponding limiting groove 152. One end of the clamping member 153 is fixed inside the housing 210, and the other end is a free end. In the case of no external force (natural condition), the free end of the clamping member 153 extends from the outside to near the mouth of the limiting groove 152 or into the mouth. A switch 154 is connected to the outside of the clamping member 153. One end of the switch 154 extends out of the surface of the housing 210 for operation, and the other end is connected to the housing 210 via a spring (not shown in the figure). The movement of the switch 154 drives the free end of the clamping member 153 to rotate relative to the fixed end of the clamping member 153. That is, when the switch 154 is pressed, the free end of the clamping member 153 is driven to extend into the limiting groove 152. If the elastic piece 213 is clamped into the limiting groove 152 from the inside at this time, the clamping member 153 will push the free end of the elastic piece 213 out of the limiting groove 152, thereby unlocking the horizontal movement of the connecting seat 211.

[0078] In this embodiment, the clamping member 153 is elastic.

[0079] In another embodiment, one end of the clamping member 153 is rotatably connected to the housing 210, and the other end can rotate around the housing 210.

[0080] In another embodiment, when no external force is applied, since the elastic piece 213 extends into the limiting groove 152 from the inside of the inner plate 140 toward the outside, it will also push out the clamping member 153, thereby driving the switch 154 to reset. Therefore, the spring is not an essential component of the switch 154.

[0081] For this embodiment, the design of the elastic piece 213 and the sound - generating area 151 not only realizes the sound prompt but also realizes an additional locking effect while providing the sound prompt.

[0082] Embodiment 2

[0083] The improvement of Embodiment 2 compared with Embodiment 1 is mainly the improvement in the way of realizing locking. Specifically, refer to Figures 11-12 , Figure 11 which is the working schematic diagram of the conveying device in Embodiment 2 of the present invention; Figure 12 is Figure 11 the enlarged schematic diagram of area D in

[0084] In this embodiment, the free end of the elastic piece 213 includes a protruding portion 2131 extending outward, and a groove 2132 is provided on the outer side of the protruding portion 2131 and is inclined inward (i.e., the side close to the axis). A plurality of grooves 2132 can be provided, or they can be provided individually. For the groove 2132, with reference to the median line 2133 in the axial direction of the protruding portion 2131, the open end of the groove 2132 is located on the side away from the median line 2133 and the axis of the closed end. Correspondingly, a positioning member 2134 that can match the groove 2132 extends obliquely toward the median line 2133 and the axis on the inner wall of the limiting groove 152. The reason for such a setting is that the protruding portion 2131 moves from the inner side to the outer side of the housing 210 of the conveying device and is snapped into the limiting groove 152. Thus, the groove 2132 can naturally accommodate the positioning member 2134 along the movement direction of the protruding portion 2131, thereby driving the locking of the elastic piece 213. When it needs to be unlocked, the design of the clamping member and the switch in Embodiment 1 (such as Figures 9-10 the clamping member 153 and the switch 154 in is adopted. The protruding portion 2131 is pushed inward by the pressure from the outer side (i.e., from the outside to the inside away from the axis), so that the groove 2132 on the protruding portion 2131 is disengaged from the positioning member 2134, so that the protruding portion 2131 can be disengaged from the position of the groove 2132, thereby realizing the free unlocking of the elastic piece 213.

[0085] Embodiment 3

[0086] The improvement of Embodiment 3 relative to Embodiment 1 is mainly the improvement in the way of realizing locking. Specifically, refer to Figures 13-14 , Figure 13 which is the working schematic diagram of the conveying device in Embodiment 3 of the present invention; Figure 14 is Figure 3 the enlarged schematic diagram of the E area in . In this embodiment, the free end of the elastic piece 213 can be snapped into the limiting groove 152. The proximal teeth 1521 of the limiting groove 152 abut against the adjacent portion 2231 of the free end of the elastic piece 213. The adjacent portion 2231 includes several depressions 2232. A plurality of convex points 1522 are provided on the inner surface of the proximal teeth 1521 on the proximal side of the limiting groove 152. The convex points 1522 can be snapped into the depressions 2231. The reason for such a setting is that the free end of the elastic piece 213 moves from the inner side to the outer side of the housing 210 of the conveying device and is snapped into the limiting groove 152. Thus, the free end of the elastic piece 213 extends into the limiting groove 152, the adjacent portion 2231 of the elastic piece 213 abuts against the proximal teeth 1521, and the depressions 2232 and the convex points 1522 match each other, thereby restricting the horizontal displacement of the elastic piece 213 and the limiting groove 152 and realizing the locking in the horizontal direction. When it needs to be unlocked, the design of the clamping member and the switch in Embodiment 1 (such as Figures 9-10In the design of the card component 153 and the switch 154), the free end of the elastic piece 213 is pushed out toward the inner side under the pressure from the outside (that is, from the outside to the inside, away from the axis side), and the free end of the elastic piece 213 drives the adjacent part 2231 to freely disengage from the contact with the proximal tooth 1521, so as to realize the free unlocking of the elastic piece 213 in the horizontal direction.

[0087] It should be noted that the technical features of the above-described embodiments can be combined arbitrarily, and can also be applied to various types of instruments described above at the same time. For the sake of concise 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 described in this specification.

[0088] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A conveying device, characterized in that, Comprising a sheath tube, the sheath tube includes an outer tube and an inner tube, characterized in that the outer tube includes an inclined portion and a main body portion sequentially distributed from the distal end to the proximal end, the outer diameter and inner diameter of the distal end of the inclined portion are respectively greater than the inner diameter and outer diameter of the main body portion, the outer tube includes a cavity passing through the inclined portion and the main body portion and a support body capable of moving in the cavity, and the support body can drive the inner wall of the cavity to deform so as to drive the inclined portion to deform or deflect.

2. The conveying device according to claim 1, wherein The outer tube includes a first state and a second state. When the support body moves from the most distal end of the cavity to the proximal end, the outer tube turns from the second state to the first state.

3. The conveying device according to claim 2, characterized in that, The inner diameter of the distal side of the outer tube in the first state is greater than the inner diameter in the second state.

4. The conveying device according to claim 2, wherein The outer diameter of the distal side of the outer tube in the first state is greater than the outer diameter in the second state.

5. The conveying device according to claim 2, characterized in that, In the first state, the inclined portion extends gradually from the proximal end to the distal end toward the side away from the axis (outer side).

6. The conveying device according to claim 1, wherein, The axial length of the support body is greater than the axial length of the inclined portion.

7. The conveying device according to claim 1, characterized in that The inclined portion and the main body portion are integrally formed. When the support body drives the inclined portion to deform, the connection position between the inclined portion and the main body portion bulges toward the inside.

8. The conveying device according to claim 1, characterized in that, The inclined portion is rotatably connected to the main body portion. When the support body moves to the distal side of the cavity, the distal end of the inclined portion rotates from the side away from the axis to a direction tending to be axial or along the axis.

9. A conveying system, characterized in that, Comprising the delivery device according to any one of claims 1-8, further comprising a stent. During the release stage of the stent, the support body is away from the distal end of the cavity.

10. The conveying system according to claim 9, characterized in that, After the stent is released, the support body moves to the distal side of the cavity, and the distal end of the inclined portion rotates from the side away from the axis to a direction tending to be axial or along the axis.

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