Junction structure and catheter having the junction structure
Provided is a junction structure between a first tubular member and a second tubular member, and a catheter including the junction structure. An interface between the first tubular member and the second tubular member has an uneven shape in the longitudinal direction of the junction structure along a circumferential direction of the first tubular member and the second tubular member. At least one of the first tubular member and the second tubular member includes a protruding portion that protrudes into the other tubular member only between an inner periphery of the other tubular member and an outer periphery of the other tubular member. The joining strength of the junction structure is improved against a pressure in the radial direction.
1. A junction structure comprising:
a first tubular member; and
a second tubular member joined end-to-end with the first tubular member, wherein:
an interface between the first tubular member and the second tubular member has an uneven shape in a longitudinal direction of the junction structure on a surface of the first tubular member and the second tubular member along a circumferential direction of the first tubular member and the second tubular member, and
one of the first tubular member and the second tubular member includes a protrusion along the uneven shape, and the entire protrusion protrudes into the other one of the first and second tubular members only in a region between an inner circumferential surface and an outer circumferential surface of the other one of the first and second tubular members so that the protrusion is sandwiched by the inner circumferential surface and the outer circumferential surface, wherein the protrusion protrudes in both the longitudinal direction and the circumferential direction.
2. The junction structure according to claim 1 , wherein the protrusion protrudes into the other one of the first and second tubular members along an entire circumferential region having the uneven shape.
3. A catheter comprising the junction structure according to claim 2 .
4. A catheter comprising:
an inner layer;
a reinforcing layer disposed around an outer periphery of the inner layer; and
the junction structure according to claim 2 as an outer layer covering the outer periphery of the inner layer and an outer periphery of the reinforcing layer,
wherein an inner periphery of the other one of the first and second tubular members penetrates into the reinforcing layer.
5. The junction structure according to claim 2 , wherein the protrusion has a continuously convex shape in cross-sectional view between the inner circumferential surface and the outer circumferential surface.
6. A catheter comprising the junction structure according to claim 5 .
7. The junction structure according to claim 1 , wherein the protrusion has a continuously convex shape in cross-sectional view between the inner circumferential surface and the outer circumferential surface.
8. A catheter comprising the junction structure according to claim 7 .
9. A catheter comprising the junction structure according to claim 1 .
10. A catheter comprising:
an inner layer;
a reinforcing layer disposed around an outer periphery of the inner layer; and
the junction structure according to claim 1 as an outer layer covering the outer periphery of the inner layer and an outer periphery of the reinforcing layer,
wherein an inner periphery of the other one of the first and second tubular members penetrates into the reinforcing layer.