Novel stress release pipe structure

Abstract

The utility model discloses a novel stress release tube structure, which comprises a catheter main body which comprises an outer tube far end and an outer tube near end; the catheter seat is arranged at the near end of the outer tube, a pipeline cavity and a connecting cavity which are communicated with each other are formed in the catheter seat, and the catheter body sequentially penetrates through the pipeline cavity and the connecting cavity; the stress release device is arranged at the joint of the catheter body and the catheter base and comprises a stress release spring and a connecting device, the stress release spring is fixed to the catheter base through the connecting device and arranged at the joint of the catheter body and the catheter base in a sleeving mode, and a pipeline through hole is formed in the connecting device; the guide pipe body penetrates through the pipeline through hole, the connecting device comprises a lower connecting base, a middle connecting clamping piece and a spring connecting base, the lower connecting base is fixed to the guide pipe base, the stress release spring is clamped to the spring connecting base, and the problem that an existing stress release pipe is high in material hardness, and consequently a middle guide pipe is prone to breakage is solved.

Description

Technical Field

[0001] This utility model relates to the field of vascular catheter devices, specifically a novel stress relief tube structure. Background Technology

[0002] Currently, interventional medical catheters on the market are usually equipped with stress relief tubes at the connection between the catheter body and the seat. These stress relief tubes are used to release the stress generated when the proximal end of the catheter body bends, thereby preventing the catheter from breaking at the connection with the seat when it bends.

[0003] To prevent the catheter from bending or breaking, the existing patent application document with the number CN202011170737.X discloses a microcatheter, including a connector, a stress diffusion tube, and a tube body. The stress diffusion tube connects the connector and the tube body. The tube body includes an inner layer, a middle layer, and an outer layer from the inside to the outside. The middle layer includes a first segment, a second segment, and a third segment connected sequentially from the distal end to the proximal end. The first segment includes a first wire and a second wire. The first wire and the second wire are arranged side by side and spirally form a spring structure. The first wire is a nickel-titanium alloy or a cobalt-chromium alloy, and the second wire is gold or its alloy or platinum or its alloy. The second segment and the third segment both adopt a braided structure, and the braiding density of the second segment is greater than that of the third segment.

[0004] However, the stress relief tube in the above scheme also uses a POE material tube body that is heat-shrinked to the connection between the tube body and the seat. The high temperature during heat shrinking can easily affect the outer surface of the tube body and the adhesive layer between the tube body and the seat. At the same time, the POE material stress relief tube is a single-lumen tube with a simple structure and is relatively rigid, resulting in poor stress relief effect. Bending or breakage of the tube still occurs frequently. Therefore, it is necessary to design a new stress relief tube structure that can prevent bending or breakage of the tube. Utility Model Content

[0005] The purpose of this invention is to provide a novel stress relief tube structure, which aims to improve the problem that the high hardness of existing stress relief tube materials leads to easy breakage of the intermediate conduit.

[0006] This utility model is achieved as follows: a novel stress relief tube structure, comprising:

[0007] The catheter body, as described above, includes the distal end and the proximal end of the outer tube;

[0008] The catheter hub is disposed on the proximal end of the aforementioned outer tube. The catheter hub contains a tubular cavity and a connecting cavity that are interconnected. The aforementioned catheter body passes through the tubular cavity and the connecting cavity in sequence.

[0009] A stress relief device is provided at the connection between the aforementioned catheter body and catheter seat, including a stress relief spring and a connecting device. The stress relief spring is fixed to the aforementioned catheter seat by the connecting device, and the stress relief spring is sleeved at the connection between the aforementioned catheter body and catheter seat.

[0010] As one embodiment of this utility model, the connecting device is provided with a pipe through hole, and the main body of the conduit passes through the pipe through hole.

[0011] As one embodiment of this utility model, the connecting device includes a lower connecting seat, an intermediate connecting clip, and a spring connecting seat. The lower connecting seat is fixed on the guide tube seat, and the stress relief spring is clipped onto the spring connecting seat. The connecting device is made of TPU material.

[0012] As one embodiment of this utility model, the lower connecting seat and the guide seat are integrally formed.

[0013] As one embodiment of the present invention, the stress relief spring includes a bottom end and a far end, and the bottom end of the spring is engaged with the spring connecting seat.

[0014] In one embodiment of this utility model, the diameter of the bottom end of the spring is larger than the diameter of the far end of the spring, and the diameter of the spring gradually decreases from the bottom end to the far end of the spring, forming a conical shape.

[0015] In one embodiment of this utility model, the diameter of the distal end of the spring is equal to the outer diameter of the conduit body.

[0016] As one embodiment of this utility model, the diameter of the spring wire of the stress relief spring is 0.6 to 1.0 mm.

[0017] As one embodiment of this utility model, the aforementioned intermediate connecting clip includes an upper connecting rod, an intermediate connecting seat, and a lower connecting rod connected in sequence.

[0018] In one embodiment of this utility model, the lower connecting seat is engaged with the lower connecting rod, and the spring connecting seat is engaged with the upper connecting rod.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model adopts a stress relief spring with a spiral structure. The overall shape is conical, and the bottom end of the spring with a large diameter serves as a support connection part. When the stress is particularly high, it will not break due to the high hardness of the tube body, unlike traditional stress relief tubes. The pressure bearing capacity of the spiral stress relief spring is much greater than that of conventional POE material tubes.

[0021] 2. This utility model does not require heat shrinking for installation. It uses a snap-fit ​​design to directly snap onto the lower connecting seat, which simplifies installation and improves assembly efficiency.

[0022] 3. The connecting device of this utility model is made of TPU material by injection molding, which can reduce production costs. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and characteristics of the utility model more apparent. The accompanying drawings and descriptions of the embodiments of this utility model are used to explain the utility model and do not constitute an undue limitation of the utility model.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a cross-sectional schematic diagram of the guide tube seat and stress relief device of this utility model;

[0026] Figure 3 This is a schematic diagram of the installation structure of the stress relief device of this utility model;

[0027] Figure 4 This is a schematic diagram of the connecting device of this utility model;

[0028] Figure 5 This is a cross-sectional schematic diagram of the connecting device of this utility model;

[0029] In the figure: 1. Main body of the conduit; 11. Distal end of the outer tube; 12. Proximal end of the outer tube; 2. Conduit seat; 21. Pipe cavity; 22. Connecting cavity; 3. Stress relief device; 31. Stress relief spring; 311. Bottom end of the spring; 312. Connecting device; 320. Pipe through hole; 321. Lower connecting seat; 322. Intermediate connecting clip; 322. Upper connecting rod; 3221. Intermediate connecting seat; 3222. Lower connecting rod; 3223. Spring connecting seat; 323. Detailed Implementation

[0030] 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 some embodiments of the present utility model, and not all 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.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Example 1

[0033] like Figures 1-5 As shown, this utility model discloses a novel stress relief tube structure. In order to solve the problem that the high hardness of existing stress relief tube materials leads to easy breakage of the intermediate conduit, a novel stress relief tube structure that can improve its connection flexibility is designed.

[0034] like Figure 1 , Figure 2 As shown, the present invention provides a novel stress relief tube structure, which mainly includes: a conduit body 1, a conduit seat 2, and a stress relief device 3.

[0035] The catheter body 1 includes a distal end 11 and a proximal end 12 of the outer tube; the catheter seat 2 is disposed on the proximal end 12 of the outer tube, and the catheter seat 2 is provided with a tube cavity 21 and a connecting cavity 22 that are interconnected. The catheter body 1 passes through the tube cavity 21 and the connecting cavity 22 in sequence.

[0036] like Figure 3 As shown, the stress relief device 3 is located at the connection between the catheter body 1 and the catheter seat 2. The stress relief device 3 includes a stress relief spring 31 and a connecting device 32. The stress relief spring 31 is fixed to the catheter seat 2 through the connecting device 32, and the stress relief spring 31 is sleeved at the connection between the catheter body 1 and the catheter seat 2.

[0037] like Figure 4 As shown, for ease of installation, the connecting device 32 includes a lower connecting seat 321, an intermediate connecting clip 322, and a spring connecting seat 323. The lower connecting seat 321 is fixed to the guide tube seat 2, and the stress relief spring 31 is clipped onto the spring connecting seat 323. The connecting device 32 is made entirely of TPU material, which can reduce material costs.

[0038] To improve connection stability, the lower connector 321 and the conduit seat 2 are designed as a single molded structure. Specifically, as shown below... Figure 5As shown, the intermediate connecting clip 322 includes an upper connecting rod 3221, an intermediate connecting seat 3222, and a lower connecting rod 3223 connected in sequence. The upper connecting rod 3221, the intermediate connecting seat 3222, and the lower connecting rod 3223 are integrally formed. The two ends of the intermediate connecting seat 3222 are the rod-shaped upper connecting rod 3221 and the lower connecting rod 3223, respectively. Therefore, the lower connecting seat 321 is snapped onto the lower connecting rod 3223, the spring connecting seat 323 is snapped onto the upper connecting rod 3221, and the bottom end 311 of the spring is snapped onto the spring connecting seat 323. In this way, only sequential snapping and installation are required to complete the installation of the connecting device 32. At the same time, the fact that it consists of multiple parts reduces the manufacturing difficulty.

[0039] like Figures 2-3 As shown, the stress relief spring 31 of this utility model includes a spring bottom end 311 and a spring far end 312, with the spring bottom end 311 snapped onto the spring connecting seat 323.

[0040] To improve overall stability, the diameter of the bottom end 311 of the spring is made larger than the diameter of the far end 312 of the spring. The diameter of the spring gradually decreases from the bottom end 311 to the far end 312 of the spring and takes the shape of a cone. The diameter of the far end 312 of the spring gradually decreases until the diameter of the far end 312 of the spring is equal to the outer diameter of the conduit body 1.

[0041] The diameter of the spring wire in the stress relief spring 31 is 0.6 to 1.0 mm, and the diameter of the spring wire in the stress relief spring 31 of this utility model is 1.0 mm.

[0042] like Figure 5 As shown, the connecting device 32 is provided with a pipe through hole 320, and the conduit body 1 passes through the pipe through hole 320.

[0043] In summary, this utility model employs a spiral stress-relieving spring with an overall conical shape. The large-diameter bottom of the spring serves as a support connection point. Unlike traditional stress-relieving tubes, which are prone to breakage due to their high hardness under extremely high stress, the spiral stress-relieving spring has a significantly higher pressure-bearing capacity than conventional POE material tubes. Installation eliminates the need for heat shrinking; it uses a snap-fit ​​design to directly attach to the lower connector, simplifying installation and improving assembly efficiency. The connecting device is injection-molded from TPU material, reducing production costs.

[0044] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0045] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A novel stress-relief pipe structure, characterized by, The utility model relates to a kind of catheter, including: Catheter body (1), the catheter body (1) includes outer tube distal end (11) and outer tube proximal end (12); Catheter seat (2) is set on the outer tube proximal end (12), catheter seat (2) is provided with pipeline cavity (21) and connecting cavity (22) in intercommunication, the catheter body (1) passes through pipeline cavity (21) and connecting cavity (22) in sequence; Stress release device (3) is set at the connection of the catheter body (1) and catheter seat (2), including stress release spring (31) and connecting device (32), the stress release spring (31) is fixed on the catheter seat (2) by connecting device (32), and the stress release spring (31) is set in the connection of the catheter body (1) and catheter seat (2).

2. A novel stress-relief pipe structure according to claim 1, characterized by, Connecting device (32) is provided with pipeline through-hole (320), and the catheter body (1) passes through the pipeline through-hole (320).

3. A novel stress-relief pipe structure according to claim 2, characterized by, Connecting device (32) includes lower connecting seat (321), intermediate connecting clamping piece (322) and spring connecting seat (323), the lower connecting seat (321) is fixed on the catheter seat (2), the stress release spring (31) is clamped on the spring connecting seat (323), and the connecting device (32) is TPU material.

4. A novel stress-relief pipe structure according to claim 3, characterized by The lower connecting seat (321) and the catheter seat (2) are integrally formed structure.

5. A novel stress-relief pipe structure according to claim 4, characterized by The stress release spring (31) includes spring bottom end (311) and spring distal end (312), and the spring bottom end (311) is clamped on the spring connecting seat (323).

6. A novel stress-relief pipe structure according to claim 5, characterized by The diameter of the spring bottom end (311) is greater than the diameter of the spring distal end (312), and the spring diameter of the spring bottom end (311) to spring distal end (312) gradually reduces and is in the shape of a cone.

7. A novel stress-relief pipe structure according to claim 6, characterized by The diameter of the spring distal end (312) is equal to the outer diameter of the catheter body (1).

8. A novel stress-relief pipe structure according to claim 7, characterized by The diameter of the spring wire of the stress release spring (31) is 0.6-1.0mm.

9. A novel stress-relief pipe structure according to claim 3, characterized by, The intermediate connecting clamping piece (322) includes upper connecting rod (3221), intermediate connecting seat (3222) and lower connecting rod (3223) connected in sequence.

10. A novel stress-relief pipe structure according to claim 9, characterized by The lower connecting seat (321) is clamped on the lower connecting rod (3223), and the spring connecting seat (323) is clamped on the upper connecting rod (3221).

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