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Coupling configuration and catheter having the same

A technology for structuring and tubular parts, applied in the direction of conduits, connecting pipes, pipes/pipe joints/fittings, etc., can solve the problems of weak joint strength, cracks in the stepped part, and cracks in the tapered part, etc., to achieve increased joint strength and joint The effect of increasing the area and increasing the joint strength

Active Publication Date: 2021-08-13
ASAHI INTECC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the medical tube described in Patent Document 1 has a problem that the joint strength against the pressure in the radial direction becomes weak, for example, when the end is joined with a tapered portion (see image 3 (b)), when the medical tube is bent, cracks are likely to occur from the tapered part to be joined, and in addition, when the end is joined with a stepped part (see Figure 5 ), when the medical tube is bent, cracks are likely to occur from the joined step

Method used

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  • Coupling configuration and catheter having the same
  • Coupling configuration and catheter having the same
  • Coupling configuration and catheter having the same

Examples

Experimental program
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Effect test

no. 1 approach

[0036] figure 1 It is a perspective view of the joint structure of the first embodiment of the present invention, figure 2 It is cut in the A-A direction figure 1 A cross-sectional view of the vicinity of the joint during the joint structure, image 3 It is a front view near the junction part of the junction structure of 1st Embodiment, Figure 4 is recorded image 3 Front view near junction of entry vertices in .

[0037] exist figure 1 In the joint structure 1, a tubular member 3 made of resin and a tubular member 5 made of resin are joined, and the joint surface 7 in the joint portion 2 of the tubular member 3 and the tubular member 5 is aligned in the longitudinal direction along the circumferential direction of the tubular member. Convex shape.

[0038] In addition, if figure 1 As shown, the concave-convex shape in this embodiment is a substantially rectangular shape along the circumferential direction of the tubular member.

[0039] Here, the joint surface 7 of ...

no. 2 approach

[0049] Hereinafter, a second embodiment of the present invention will be described.

[0050] Figure 5 It is a front view showing the vicinity of the junction of the entry apex 14 in the junction structure 11 according to the second embodiment.

[0051] exist Figure 5 In the joint structure 11, the tubular member 13 made of resin and the tubular member 15 made of resin are joined, and the joint surface 17 in the joint portion 12 of the tubular member 13 and the tubular member 15 is in the long axis direction along the circumferential direction of the tubular member. Convex shape.

[0052] In addition, the concave-convex shape in this embodiment is also the same as the joining structure 1 of the first embodiment, and is substantially rectangular in the circumferential direction of the tubular member.

[0053] Therefore, in the joint structure 11 of the present embodiment, the joint surface 17 in the joint portion 12 of the tubular member 13 and the tubular member 15 also ha...

no. 3 approach

[0058] Hereinafter, a third embodiment of the present invention will be described.

[0059] Image 6 It is a front view of the vicinity of the joint part of the joint structure 21 of the third embodiment, Figure 7 is in Image 6 A front view of the vicinity of the joint that enters the apex 24 is added with a dotted line.

[0060] exist Image 6 In the joint structure 21, the tubular member 23 made of resin and the tubular member 25 made of resin are joined, and the joint surface 27 in the joint portion 22 of the tubular member 23 and the tubular member 25 is in the longitudinal direction along the circumferential direction of the tubular member. Convex shape.

[0061] In addition, if Image 6 As shown, the concave-convex shape of this embodiment is a wave shape along the circumferential direction of the tubular member.

[0062] Here, as in the first and second embodiments, the joining surface 27 of the tubular member 23 and the tubular member 25 is made to have a conve...

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Abstract

To provide a junction structure and a catheter having the junction structure, further improving the junction strength including improving the junction strength with respect to the pressure in the radial direction. In the joining structure of the tubular member (3) made of resin and the tubular member (5) made of resin, the joint surface of the tubular member (3) and the tubular member (5) has a convex-convex shape in the long-axis direction along the circumferential direction , under cross-sectional observation, either one of the tubular member (3) and the tubular member (5) enters the other tubular member in regions other than both ends of the other tubular member.

Description

technical field [0001] The present invention relates to a joining structure for joining end portions of two tubular members and a catheter having the joining structure. Background technique [0002] Catheters inserted into internal lumens such as blood vessels and urinary catheters of patients during surgery generally include a tubular member, a distal end piece joined to the distal end of the tubular member, and a junction tube joined to the proximal end of the tubular member. [0003] In addition, in this catheter, a plurality of tubular members having different hardness are prepared so that the flexibility gradually increases toward the distal end, and tubular members having lower hardness toward the distal end are sequentially joined. [0004] In this way, although the tubular member used in the catheter is a catheter manufactured by sequentially joining a plurality of tubular members, sufficient joint strength is required for the joined tubular members so that when the ...

Claims

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Application Information

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IPC IPC(8): B29C65/00A61M25/00A61M39/10F16L13/10
CPCA61M25/0009A61M25/0054A61M2039/1027A61M25/005A61M39/10A61M25/0012A61M25/0053
Inventor 清水友亮
Owner ASAHI INTECC CO LTD
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