Guide wire capable of improving connection strength

Abstract

The utility model relates to the field of medical supplies, in particular to a guide wire capable of improving connection strength, which comprises a metal wire and a core wire, the metal wire comprises a connection end close to one end of the core wire, the core wire comprises a matching end close to one end of the metal wire, and the connection end is provided with a connection binding surface with a stepped section. The matching end is provided with a matching binding face matched with the connecting binding face in shape, and the connecting binding face and the matching binding face are fixedly connected through glue. Compared with the prior art that the ends of the metal wires and the ends of the core wires are directly bonded through plane bonding, the structure has a more stable connecting face, the connecting strength between the metal wires and the core wires is guaranteed, the bonding section is wrapped by the sleeve, the outer diameter of the bonding section is made to be consistent with the overall outer diameter of a product, the torque transmission capacity is improved, and the torsion control performance of the guide wire is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical supplies, in particular to a guide wire for interventional therapy. Background Art

[0002] At present, the connection mode between the metal wire and the core wire of the guide wire for interventional therapy is mainly to splice the end of the metal wire and the end of the core wire with glue (as shown in the attached drawings of the specification). Figure 2 However, this method has two disadvantages: First, because the internal space between the core wire and the metal wire is too small, the glue cannot be completely filled, resulting in unstable connection strength; Second, because the core wire at the splicing position needs to be ground thin, it affects torque transmission, thereby affecting the torsional control performance of the guide wire.

[0003] The technical problem to be solved by this application is: how to improve the connection mode between the metal wire and the core wire so as to improve the connection strength between the two. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a guide wire with improved connection strength.

[0005] The technical solution adopted by the utility model is: a guide wire with improved connection strength, including a metal wire and a core wire. The metal wire includes a connection end near one end of the core wire, and the core wire includes a mating end near one end of the metal wire. The connection end is provided with a connection fitting surface with a stepped cross-section, and the mating end is provided with a mating fitting surface that matches the shape of the connection fitting surface. The connection fitting surface and the mating fitting surface are fixedly connected by glue.

[0006] In some embodiments, it includes a sleeve, and the sleeve is fixedly sleeved on the outer walls of the connection end and the mating end.

[0007] In some embodiments, the metal wire includes a fixed end, and the core wire includes a movable end. A connection inclined surface is provided between the fixed end and the connection end, and a mating inclined surface is provided between the movable end and the mating end. The inner wall of the sleeve matches the shapes of the outer wall of the connection end, the outer wall of the mating end, the connection inclined surface, and the mating inclined surface.

[0008] In some embodiments, the outer wall of the sleeve forms a straight line with the outer wall of the fixed end and the outer wall of the movable end respectively.

[0009] In some embodiments, the connection end and the mating end are cuboids or semi-cylinders.

[0010] The beneficial effect of the utility model lies in:

[0011] This wire for improving connection strength is adhesively bonded through planar bonding. Compared with the direct bonding of the end of the original metal wire and the end of the core wire, this structure has a more stable connection surface, ensuring the connection strength between the metal wire and the core wire. By covering the bonding section with a sleeve, the outer diameter of the bonding section is made consistent with the overall outer diameter of the product, enhancing the ability to transmit torque and improving the torsional control performance of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural view of the present utility model;

[0013] Figure 2 is a schematic structural view of a prior art wire;

[0014] The reference numerals in the drawings correspond to the names as follows: 1, metal wire; 2, core wire; 3, sleeve; 11, connection end; 12, fixed end; 21, movable end; 22, mating end; 23, spring; 111, connection mating surface; 221, mating mating surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1 , the present utility model provides a technical solution: a wire for improving connection strength, including a metal wire 1, a core wire 2 and a sleeve 3. The metal wire 1 includes a connection end 11 and a fixed end 12, and the fixed end 12 and the connection end 11 are integrally formed. The connection end 11 is the end of the metal wire 1 close to the core wire 2, and the connection end 11 is provided with a connection mating surface 111 with a stepped cross-section. The core wire 2 includes a movable end 21 and a mating end 22, and the movable end 21 and the mating end 22 are integrally formed. The mating end 22 is the end of the core wire 2 close to the metal wire 1, and the mating end 22 is provided with a mating mating surface 221 that is in shape fit with the connection mating surface 111. The connection mating surface 111 and the mating mating surface 221 are connected to form a rectangular cross-section. The connection mating surface 111 and the mating mating surface 221 are fixedly connected by glue. The connection end 11 and the mating end 22 are semi-cylinders. Through the connection of the connection mating surface 111 and the mating mating surface 221, the connection between the metal wire 1 and the core wire 2 is more stable and can also ensure the connection strength.

[0017] A connecting inclined surface is provided between the fixed end 12 and the connecting end 11, and the connecting inclined surface slopes downward from the fixed end 12 towards the connecting end 11. A mating inclined surface is provided between the movable end 21 and the mating end 22, and the mating inclined surface slopes downward from the movable end 21 towards the mating end 22.

[0018] The sleeve 3 is arranged between the fixed end 12 and the connecting end 11 and is fixedly sleeved on the outer walls of the connecting end 11 and the mating end 22. The inner wall of the sleeve 3 is in shape fit with the outer wall of the connecting end 11, the outer wall of the mating end 22, the connecting inclined surface and the mating inclined surface. The outer wall of the sleeve 3 forms a straight line with the outer wall of the fixed end 12 and the outer wall of the movable end 21 respectively. The overall surface of the guide wire is smoother and more beautiful, and the overall torque transmission ability of the guide wire is improved, and the twist control performance of the guide wire is improved.

[0019] Two springs 23 with different elastic coefficients are sleeved on the outer wall of the movable end 21, which are made of stainless steel 304 and platinum respectively.

[0020] The sleeve 3 is made of polyurethane, the metal wire 1 is made of stainless steel 304 and its outer wall is coated with PTFE (polytetrafluoroethylene), and the core wire 2 is made of nitinol alloy and its outer wall is coated with a hydrophilic coating.

[0021] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A guide wire for improving connection strength, comprising a metal wire (1) and a core wire (2), characterized in that: The metal wire (1) comprises a connecting end (11) close to one end of the core wire (2); the core wire (2) comprises a matching end (22) close to one end of the metal wire (1); the connecting end (11) is provided with a connecting fitting surface (111) having a stepped cross-section; the matching end (22) is provided with a matching fitting surface (221) matching in shape with the connecting fitting surface (111); the connecting fitting surface (111) and the matching fitting surface (221) are fixedly connected by glue.

2. A guide wire with improved connection strength according to claim 1, characterized in that: It comprises a sleeve (3), wherein the sleeve (3) is fixedly sleeved on the outer walls of the connecting end (11) and the matching end (22).

3. A guide wire with improved connection strength according to claim 2, characterized in that: The metal wire (1) comprises a fixed end (12), the core wire (2) comprises a movable end (21), a connecting bevel is provided between the fixed end (12) and the connecting end (11), a matching bevel is provided between the movable end (21) and the matching end (22), and the inner wall of the sleeve (3) matches the outer wall of the connecting end (11), the outer wall of the matching end (22), the connecting bevel and the matching bevel in shape.

4. A guide wire with improved connection strength according to claim 2, characterized in that: The outer wall of the sleeve (3) forms a straight line with the outer wall of the fixed end (12) and the outer wall of the movable end (21) respectively.

5. A guide wire with improved connection strength according to claim 1, characterized in that: The connecting end (11) and the matching end (22) are rectangular parallelepiped or semi-cylindrical.

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