Conveying system

Abstract

The utility model discloses a conveying system, which relates to the technical field of medical instruments, and comprises a catheter, a conveying belt and a conveying belt, the conveying rod is movably arranged in the cavity of the catheter; the spring ring is connected with the conveying rod; the connecting assembly comprises a first connecting part and a second connecting part which are arranged in a split mode. The first connecting part comprises a first connecting body, a first protruding part arranged on the end face of the first connecting body in a protruding mode and a second protruding part arranged at the end, back on to the first connecting body, of the first protruding part. The second connecting part comprises a second connecting body, a first concave part arranged on the second connecting body and a second concave part communicated with the first concave part. According to the technical scheme provided by the utility model, the first connecting part and the second connecting part are matched for use, so that the technical problem that the position of a release point of an existing conveying system is easy to deviate is solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a delivery system. Background Technology

[0002] Patent ductus arteriosus (PDA) surgery is an interventional treatment primarily aimed at closing the abnormal ductus arteriosus and restoring normal blood circulation. During the procedure, a coil is typically used to physically block the defect in the PDA. The surgeon delivers the coil to the PDA using catheter technology and precisely positions it with imaging techniques such as X-ray fluoroscopy or echocardiography. Once the coil reaches the target location, the surgeon releases it through specific manipulations, causing it to expand and occupy the defect in the PDA. Current delivery systems generally employ mechanical release.

[0003] However, during use, the existing conveying system has a technical problem where the location of the release point is prone to deviation. Utility Model Content

[0004] The main purpose of this invention is to propose a conveying system that aims to solve the technical problem that the position of the release point is prone to deviation in existing conveying systems.

[0005] For the above objectives, the present invention provides a conveying system comprising:

[0006] A catheter with a through-hole inside;

[0007] The delivery rod is movably disposed within the cavity of the conduit;

[0008] A spring coil, connected to the conveyor rod; and

[0009] A connecting assembly includes a first connecting component and a second connecting component that are separately configured. The first connecting component includes a first connecting body, a first protrusion protruding from the end face of the first connecting body, and a second protrusion located at one end of the first protrusion facing away from the first connecting body. The second connecting component includes a second connecting body, a first recess located in the second connecting body, and a second recess communicating with the first recess. The first protrusion engages with the second recess, and the second protrusion engages with the first recess. One of the first connecting body and the second connecting body is connected to the conveying rod, and the other of the first connecting body and the second connecting body is connected to the spring coil.

[0010] In one embodiment, the end of the first connecting body facing away from the first protrusion is connected to the conveying rod, and the end of the second connecting body facing away from the first recess is connected to the spring coil. The second recess and the spring coil are located on opposite sides of the first recess.

[0011] In one embodiment, the first protrusion and the second protrusion are arranged in a T-shape or a cross shape; and / or,

[0012] The first recess and the second recess are arranged in a T-shape or a cross shape.

[0013] In one embodiment, the first connecting component further includes a connecting hole disposed in the first connecting body, and the conveying rod is inserted into the connecting hole; and / or,

[0014] The second connecting component further includes a connecting shaft, which connects the second connecting body and the spring coil.

[0015] In one embodiment, the second recess has a groove bottom and a first sidewall and a second sidewall connected to the groove bottom. The first sidewall and the second sidewall are disposed opposite to each other and are inclined in a direction away from the groove bottom. The first protrusion is adapted to the second recess.

[0016] In one embodiment, the first protrusion is fan-shaped, cylindrical, semi-circular, or rectangular, and the second recess is provided in a shape corresponding to the first protrusion; and / or,

[0017] The second protrusion is fan-shaped, cylindrical, semi-circular, or rectangular, and the first concave portion is provided in a shape corresponding to the second protrusion.

[0018] In one embodiment, the end of the first connecting body facing away from the second protrusion is connected to the spring coil. The second protrusion is a sphere or a hemisphere. The second recess extends along the axial direction of the second connecting body. The first recess is a concave hole, and the second recess is a tapered groove with the taper decreasing in the direction close to the concave hole.

[0019] The first protrusion is clamped to the second recess, and the second protrusion engages with the recess.

[0020] In one embodiment, the material of the second connecting body is an elastic material or a shape memory alloy.

[0021] In one embodiment, the outer diameters of the first connecting component and the second connecting component are smaller than the inner diameter of the conduit.

[0022] In one embodiment, one of the first connecting component and the second connecting component is welded to the conveying rod, and the other of the first connecting component and the second connecting component is welded to the spring coil.

[0023] In the technical solution provided by this utility model, the catheter provides an integral structural framework for the delivery system, ensuring structural strength. The delivery rod is movably located inside the catheter and is an important component of the delivery system, capable of pulling the spring coil into or pushing it out of the catheter cavity. The spring coil is an important structure for achieving patent ductus arteriosus occlusion, occupying the defect site to achieve physical blockage. By utilizing the designed connecting components, when the spring coil needs to be placed into the cavity of the catheter, one of the first and second connecting components connects to the delivery rod, and the other connects to the spring coil. At this time, the distal end of the delivery rod passes through the catheter, and the delivery rod is pulled until one of the first and second connecting components is fully exposed. A secure connection is achieved through the engagement of the first protrusion and the second concave portion, and vice versa. Subsequently, pulling the delivery rod accurately delivers the spring coil to the designated position within the catheter cavity. When it is necessary to remove the spring coil from the cavity of the catheter, the delivery rod is pushed until one of the first and second connecting components connected to the spring coil is fully exposed. At this point, the spring coil is released under gravity and force, and the entire delivery system can be smoothly withdrawn, completing the treatment process. The technical solution proposed in this embodiment can reduce the risks caused by deviations in the release point position and reduce the impact of mechanical forces on the accuracy of the release point position, thereby ensuring a high degree of safety and precision in the surgical procedure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 Schematic diagram of the structure of the conveying system provided by this utility model in Embodiment 1 Figure 1 ;

[0026] Figure 2 Schematic diagram of the structure of the conveying system provided by this utility model in Embodiment 1 Figure 2 ;

[0027] Figure 3 A three-dimensional structural schematic diagram of a first embodiment of the connecting component provided by this utility model;

[0028] Figure 4 Schematic diagram of the structure of the conveying system provided by this utility model in Embodiment 2 Figure 1 ;

[0029] Figure 5Schematic diagram of the structure of the conveying system provided by this utility model in Embodiment 2 Figure 2 ;

[0030] Figure 6 A three-dimensional structural schematic diagram of a second embodiment of the connecting component provided by this utility model.

[0031] Explanation of icon numbers:

[0032] 100, conduit; 200, conveying rod; 300, spring ring; 400, connecting assembly; 410, first connecting part; 411, first connecting body; 412, first protrusion; 413, second protrusion; 420, second connecting part; 421, second connecting body; 422, first recess; 423, second recess; 500, connecting hole; 600, connecting shaft.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one part of the embodiments of the present utility model, and not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] For the technique of patent ductus arteriosus (PDA) closure with coils, during the procedure, the surgeon uses catheter technology to deliver the coil to the PDA location and uses imaging techniques such as X-ray fluoroscopy or echocardiography for precise positioning. Once the coil reaches the target location, the surgeon releases it through specific manipulations, causing it to expand and occupy the defect in the PDA. After the procedure, the patient needs regular follow-up and re-examination to assess the closure effect and the recovery of cardiac function. Currently, there are various methods for stent release on the market, mainly including electrofusion release, electrothermal release, hydraulic release, and mechanical release. Among them, mechanical release is popular in practice due to its advantages of simple operation and stable release. However, due to the mechanical force, the release point of existing mechanical release structures may deviate, which increases the complexity and uncertainty of the procedure. In addition, during implantation, due to accidental contact or other unforeseen factors, the coil may release prematurely, which can negatively affect the overall outcome of the procedure.

[0038] In view of this, the present invention provides a delivery system that can effectively meet the different needs of medical personnel during the surgical procedure. By using the set limiting protrusion and limiting recess to connect and fix the first connecting component and the second connecting component, the delivery rod can accurately pull the spring coil into the catheter or push it to the implantation site, ensuring smooth delivery and accurate release during the treatment process. It solves the problems of insufficient force points, displacement and pushing difficulties caused by the lack of constraint on the connecting components during delivery, reduces the risks caused by the deviation of the release point position, and improves the efficiency and safety of the operation.

[0039] To better understand the above technical solution, the following detailed explanation is provided in conjunction with the accompanying drawings.

[0040] like Figure 1 , Figure 2 as well as Figure 4 As shown in the embodiment of this utility model, a delivery system is proposed to improve the safety of the surgical procedure. The delivery system includes:

[0041] The catheter 100 has a through cavity inside;

[0042] The delivery rod 200 is movably disposed within the cavity of the conduit 100;

[0043] Spring coil 300 is connected to conveyor rod 100; and

[0044] The connecting assembly 400 includes a first connecting component 410 and a second connecting component 420 that are separately configured. The first connecting component 410 includes a first connecting body 411, a first protrusion 412 protruding from the end face of the first connecting body 411, and a second protrusion 413 located at one end of the first protrusion 412 facing away from the first connecting body 411. The second connecting component 420 includes a second connecting body 421, a first recess 422 located in the second connecting body 421, and a second recess 423 communicating with the first recess 422. The first protrusion 412 engages with the second recess 423, and the second protrusion 413 engages with the first recess 422. One of the first connecting body 411 and the second connecting body 421 is connected to the conveying rod 200, and the other of the first connecting body 411 and the second connecting body 421 is connected to the spring coil 300.

[0045] In this embodiment, the catheter 100 provides an integral structural frame for the delivery system, ensuring structural strength. The delivery rod 200 is movably disposed within the catheter 100, used to pull the spring coil 300 into or push it out of the cavity of the catheter 100. The spring coil 300 is a crucial structure for achieving patent closure of the arterial catheter 100, occupying the defect site to achieve physical blockage. By utilizing the connecting component 400, when the spring coil 300 needs to be placed into the cavity of the catheter 100, one of the first connecting component 410 and the second connecting component 420 is connected to the delivery rod 200, and the other is connected to the spring coil 300. At this time, the distal end of the delivery rod 200 is inserted into the catheter 100. The delivery rod 200 is pulled until one of the first connecting component 410 and the second connecting component 420 is fully exposed. A stable connection is achieved by the first protrusion 412 engaging with the second concave portion 423 and the second protrusion 413 engaging with the first concave portion 422. Subsequently, the spring coil 300 is accurately delivered to the designated position in the cavity of the catheter 100 by pulling the delivery rod 200. When it is necessary to remove the spring coil 300 from the cavity of the catheter 100, the delivery rod 200 is pushed until one of the first connecting component 410 and the second connecting component 420 connected to the spring coil 300 is fully exposed. At this time, the spring coil 300 is released under gravity and force, and the entire delivery system can be smoothly withdrawn, completing the treatment process.

[0046] Specifically, the conveying system includes a conduit 100, a conveying rod 200, a spring coil 300, and a connecting assembly 400.

[0047] The catheter 100 can be made of medical-grade polyurethane or polyethylene, which has good flexibility and abrasion resistance and can provide support.

[0048] The delivery rod 200 is movably disposed within the cavity of the catheter 100 and is used to push or guide the movement of the spring coil 300. Understandably, when one end of the delivery rod 200 is inserted into the catheter 100 and the spring coil 300 is connected to one end of the delivery rod 200, pulling the delivery rod 200 can move the spring coil 300 into or out of the cavity of the catheter 100. The delivery rod 200 is generally made of medical-grade stainless steel or titanium alloy, possessing good strength and durability.

[0049] Coil 300 is typically made of nickel-titanium alloy or stainless steel, exhibiting good biocompatibility and corrosion resistance. Upon release at the designated location, it rapidly expands and occupies the defect site, achieving physical occlusion. Simultaneously, the internal structure of coil 300 promotes platelet and fibrin deposition, further facilitating thrombus formation and enhancing the occlusion effect.

[0050] The connecting assembly 400 is used to connect the conveying rod 200 and the spring coil 300. It is understood that the connecting assembly 400 connects the spring coil 300 to one end of the conveying rod 200, allowing the conveying rod 200 to easily move the spring coil 300 into or out of the cavity of the conduit 100. In this embodiment, the connecting assembly 400 includes a first connecting component 410 and a second connecting component 420, which are separately configured. The first connecting component 410 has a first protrusion 412 and a second protrusion 413, and the second connecting component 420 has a first recess 422 and a second recess 423. When the spring coil 300 needs to be delivered, the first protrusion 412 engages with the second recess 423, and the second protrusion 413 engages with the first recess 422, fixing the spring coil 300 to one end of the delivery rod 200. The delivery rod 200 moves toward the cavity of the catheter 100 until the spring coil 300 is completely inside the cavity of the catheter 100, thus realizing the delivery process of the spring coil 300. When the spring coil 300 needs to be removed, the delivery rod 200 moves toward the outside of the cavity of the catheter 100 until the spring coil 300 is completely outside the cavity of the catheter 100, thus realizing the implantation of the spring coil 300.

[0051] During the procedure, a series of steps are performed, including intravenous puncture under anesthesia, insertion of a puncture sheath, establishment of a channel using a guidewire, and insertion of a catheter 100 to reach the treatment location. This ensures that the implanted coil 300 is accurately and stably positioned and fixed in the target location. When the coil 300 is released under gravity and force, the entire delivery system can be smoothly withdrawn, completing the treatment process.

[0052] Furthermore, refer to Figure 2 , Figure 3In one embodiment of the present invention, the end of the first connecting body 411 facing away from the first protrusion 412 is connected to the conveying rod 200, and the end of the second connecting body 421 facing away from the first recess 422 is connected to the spring coil 300. The second recess 423 and the spring coil 300 are located on opposite sides of the first recess 422.

[0053] In this embodiment, the precise fit between the first protrusion 412 and the second recess 423 ensures a tight fit of the outer contour of the connecting component 400, effectively constraining its radial displacement and reducing difficulties in pushing due to poor fit of the outer contour. This ensures smooth delivery and accurate release during treatment. The cooperation between the second protrusion 413 and the first recess 422 effectively constrains the axial displacement of the connecting component 400, ensuring accurate transmission of the distal delivery force of the delivery rod 200 to guarantee that the spring coil 300 is accurately delivered to the target position.

[0054] Furthermore, in one embodiment of this utility model, the first protrusion 412 and the second protrusion 413 are arranged in a T-shape or a cross shape; and / or,

[0055] The first recess 422 and the second recess 423 are arranged in a T-shape or a cross shape.

[0056] In the technical solution adopted in this embodiment, the T-shaped concave-convex structure can solve the problems of insufficient force points, displacement, and difficulty in pushing caused by the lack of constraint on the connecting parts during the conveying process. The T-shaped concave-convex structure can restrict the axial movement of the spring coil 300, thereby improving the stability and reliability of the conveying system. Of course, it can also be set as a cross shape or a star shape, which is not limited here.

[0057] Furthermore, refer to Figure 2 , Figure 3 In one embodiment of this utility model, the first connecting component 410 further includes a connecting hole 500 disposed in the first connecting body 411, and the conveying rod 200 is inserted into the connecting hole 500; and / or,

[0058] The second connecting component 420 also includes a connecting shaft 600, which connects the second connecting body 421 and the spring ring 300.

[0059] In this embodiment, the connecting hole 500 allows for insertion into the conveying rod 200, ensuring stability and ease of operation during conveying. The connecting shaft 600 allows insertion into the proximal end of the spring coil 300 and fixation to it, reducing the possibility of accidental release of the spring coil 300 during conveying.

[0060] Furthermore, refer to Figure 3 In one embodiment of the present invention, the second recess 423 has a groove bottom and a first sidewall and a second sidewall connected to the groove bottom. The first sidewall and the second sidewall are arranged opposite to each other and are inclined in a direction away from the groove bottom. The first protrusion 412 is adapted to the second recess 423.

[0061] In the technical solution adopted in this embodiment, in order to optimize the smoothness of the implantation process, the first sidewall and the second sidewall of the second recess 423 are inclined in a direction away from each other in the direction away from the bottom of the groove. This can facilitate the movement of the first protrusion 412 and easily insert the first protrusion 412 into the second recess 423. At the same time, when it is necessary to release the spring coil 300, the first protrusion 412 can be easily removed from the second recess 423. This reduces the risk that the first connecting member 410 and the second connecting member 420 cannot be quickly and effectively released due to mutual interlocking when the spring coil 300 is pushed out, thereby improving the stability and reliability of the entire system.

[0062] Furthermore, in one embodiment of this utility model, the first protrusion 412 is fan-shaped, cylindrical, semi-circular, or rectangular, and the second recess 423 is provided correspondingly to the shape of the first protrusion 412; and / or,

[0063] The second protrusion 413 is fan-shaped, cylindrical, semi-circular, or rectangular, and the first recess 422 is provided in a shape corresponding to the second protrusion 413.

[0064] In this embodiment, the first protrusion 412 can be fan-shaped, cylindrical, semi-circular, or rectangular. The second recess 423 corresponds to and matches the shape of the first protrusion 412, ensuring that the first protrusion 412 can be correctly fitted into the second recess 423. Similarly, the second protrusion 413 can be fan-shaped, cylindrical, semi-circular, or rectangular, and the first recess 422 and the second protrusion 413 correspond to and match, ensuring that the second protrusion 413 can be correctly fitted into the first recess 422. It is understood that the corresponding design of the shapes of the second recess 423 and the first protrusion 412, as well as the shapes of the first recess 422 and the second protrusion 413, ensures precise fit and stable connection. These basic protrusion and recess shapes are relatively easy to manufacture and design, simplifying the production and connection processes.

[0065] Furthermore, refer to Figure 5 , Figure 6In another embodiment of the present invention, one end of the first connecting body 411 facing away from the second protrusion 413 is connected to the spring coil 300. The second protrusion 413 is a sphere or a hemisphere. The second recess 423 extends along the axial direction of the second connecting body 421. The first recess 422 is a concave hole. The second recess 423 is a tapered groove and the taper decreases in the direction close to the concave hole.

[0066] The first protrusion 412 is clamped to the second recess 423, and the second protrusion 413 is engaged with the recess 422.

[0067] In this embodiment, the first connecting component 410 and the second connecting component 420 adopt a spherical crown design. The second connecting component 420 in this embodiment has an automatic size adjustment function. When the second protrusion 413 is inserted into the recess, as the second connecting component 420 moves towards the cavity of the conduit 100, the pressure applied to the inner wall of the conduit 100 causes the two sides of the second recess 423 to converge towards the center. During this convergence process, the second recess 423 tightly clamps the first protrusion 412, thereby effectively constraining the axial and radial displacement of the connecting assembly 400. This not only ensures the stability of the conveying process but also reduces operational difficulties caused by the interlocking of components during release.

[0068] Furthermore, in another embodiment of this utility model, the material of the second connecting body 421 is an elastic material or a shape memory alloy.

[0069] In this embodiment, the reliability and durability of the delivery system are enhanced by this configuration. It is understood that elastic materials or shape memory alloys can deform under external force and quickly return to their original shape after the force is removed. This characteristic allows the second connecting component 420 to smoothly shrink as it passes through the conduit 100 and return to its original shape after extending out of the conduit 100, continuing to clamp the implanted portion and ensuring the continuous stability of the delivery system.

[0070] Furthermore, refer to Figure 2 , Figure 5 In one embodiment of this utility model, the outer diameter of the first connecting component 410 and the second connecting component 420 is smaller than the inner diameter of the conduit 100.

[0071] In the technical solution adopted in this embodiment, the first connecting component 410 and the second connecting component 420 are arranged in such a way that they can pass more easily through the inside of the conduit 100, reducing resistance during insertion and movement and improving the convenience of operation.

[0072] Furthermore, in one embodiment of the present invention, one of the first connecting component 410 and the second connecting component 420 is welded and fixed to the conveying rod 200, and the other of the first connecting component 410 and the second connecting component 420 is welded and fixed to the spring coil 300.

[0073] In this embodiment, the connection between the first connecting component 410 and the second connecting component 420 and the conveying rod 200 and the spring coil 300 is fixed by welding. This ensures that the connecting component 400 will not shift or fall off during the conveying and releasing of the spring coil 300, improving the stability and reliability of the connecting component 400 and making the entire conveying system less prone to failure during use. The welding method can be soldering or laser welding, etc., and is not limited here.

[0074] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A conveying system, characterized in that, The conveying system includes: A catheter with a through-hole inside; The delivery rod is movably disposed within the cavity of the conduit; A spring coil is connected to the conveyor rod; and A connecting assembly includes a first connecting component and a second connecting component that are separately configured. The first connecting component includes a first connecting body, a first protrusion protruding from the end face of the first connecting body, and a second protrusion located at one end of the first protrusion facing away from the first connecting body. The second connecting component includes a second connecting body, a first recess located in the second connecting body, and a second recess communicating with the first recess. The first protrusion engages with the second recess, and the second protrusion engages with the first recess. One of the first connecting body and the second connecting body is connected to the conveying rod, and the other of the first connecting body and the second connecting body is connected to the spring coil.

2. The delivery system of claim 1, wherein, The end of the first connecting body facing away from the first protrusion is connected to the conveying rod, and the end of the second connecting body facing away from the first concave portion is connected to the spring coil. The second concave portion and the spring coil are located on opposite sides of the first concave portion.

3. The delivery system of claim 2, wherein, The first protrusion and the second protrusion are arranged in a T-shape or a cross shape; and / or, The first recess and the second recess are arranged in a T-shape or a cross shape.

4. The conveying system as described in claim 2, characterized in that, The first connecting component further includes a connecting hole disposed in the first connecting body, and the conveying rod is inserted into the connecting hole; and / or, The second connecting component further includes a connecting shaft, which connects the second connecting body and the spring coil.

5. The delivery system of claim 2, wherein, The second recess has a groove bottom and a first sidewall and a second sidewall connected to the groove bottom. The first sidewall and the second sidewall are arranged opposite to each other and are inclined in a direction away from the groove bottom. The first protrusion is adapted to the second recess.

6. The delivery system of claim 2, wherein, The first protrusion is fan-shaped, cylindrical, semi-circular, or rectangular, and the second concave portion is provided in a shape corresponding to the first protrusion; and / or, The second protrusion is fan-shaped, cylindrical, semi-circular, or rectangular, and the first concave portion is provided in a shape corresponding to the second protrusion.

7. The delivery system of claim 1, wherein, One end of the first connecting body facing away from the second protrusion is connected to the spring coil. The second protrusion is a sphere or a hemisphere. The second concave part extends along the axial direction of the second connecting body. The first concave part is a concave hole, and the second concave part is a tapered groove with the taper decreasing in the direction close to the concave hole. The first protrusion is clamped to the second recess, and the second protrusion engages with the recess.

8. The delivery system of claim 7, wherein, The material of the second connecting body is an elastic material or a shape memory alloy.

9. The delivery system of claim 1, wherein, The outer diameters of the first connecting component and the second connecting component are smaller than the inner diameter of the conduit.

10. The delivery system of claim 1, wherein, One of the first connecting component and the second connecting component is welded and fixed to the conveying rod, and the other of the first connecting component and the second connecting component is welded and fixed to the spring coil.

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