Guide wire
By setting up an equidistantly distributed drainage groove on the welding section of the guide wire, the problem of uneven solder distribution during the guide wire brazing process is solved, precise control of welding length and improvement of welding strength is achieved, and the guide wire product is improved Quality stability and scope of use.
Patent Information
- Application Number
- CN202420430599.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-06
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-06
AI Technical Summary
During the brazing process of guide wire, the flow direction and flow distance of the molten solder are not easy to control, resulting in a difference in solder distribution between the core wire and the spring, affecting the quality stability of the guide wire product.
A number of equidistantly distributed drainage grooves are arranged on the welding section of the core wire. The spring is filled and welded with the welding section. The drainage groove is designed to guide and control the solder flow to ensure the uniformity and accuracy of the welding area.
Through the design of the drainage groove, precise control of welding length is achieved, performance differences are reduced, welding strength and stability are improved, welding defects are reduced, guide wire head design is optimized, and the scope of use in narrow blood vessels is expanded.
Smart Images
Figure CN222265915U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and in particular to a guide wire. Background Art
[0002] Guidewires are widely used in vascular interventional surgery and are indispensable medical devices in vascular interventional surgery. Guidewires are usually composed of core wires, springs, sheaths and coatings. The core wire is a metal wire used to provide support for the guidewire; the spring is connected to the head end of the core wire to play a supporting and guiding role; the sheath is generally made of PU material, which is attached to the surface of the core wire to protect the core wire; the coating is applied to the surface of the sheath and the spring to reduce the friction on the surface of the guidewire to facilitate the sliding of the guidewire.
[0003] In the related art, in order to connect the spring to the head end of the core wire, the spring is usually put on the core wire, and the spring and the core wire are brazed to make the spring firmly welded to the core wire.
[0004] However, during brazing, the flow direction and flow distance of the molten solder are difficult to control, resulting in differences in the distribution of solder between the core wire and the spring on different guide wire products, which results in performance differences between different guide wire products and affects the quality stability of guide wire products. Utility Model Content
[0005] The embodiment of the present application provides a guide wire, comprising a core wire and a spring, wherein the core wire has a welding section, and the outer surface of the welding section has a plurality of drainage grooves, and adjacent drainage grooves are equidistantly distributed;
[0006] The spring is sleeved on the welding section, and the spring is welded to the welding section through the solder filled in the drainage groove.
[0007] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the surface of the welding section has a plane, the drainage groove is arranged on the plane, and the drainage groove is arranged obliquely with respect to the length direction of the welding section.
[0008] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the surface of the welding section has a plane, the drainage groove is arranged on the plane, and the drainage groove is arranged in a colinear manner relative to the length direction of the welding section.
[0009] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the surface of the welding section has at least two planes, and the drainage groove is provided on each of the planes.
[0010] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the surface of the welding section has at least two planes parallel to each other, and the drainage grooves on the two planes parallel to each other are symmetrically arranged.
[0011] In one possible implementation manner, in the guidewire provided in the embodiment of the present application, the surface of the welding section is an arc surface, the drainage groove is arranged on the arc surface, and the drainage groove is arranged in a colinear manner relative to the length direction of the welding section.
[0012] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the surface of the welding section is a cylindrical surface, the drainage groove is arranged on the cylindrical surface, and the drainage groove is spirally arranged on the cylindrical surface.
[0013] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the welding section is a cylinder.
[0014] In one possible implementation manner, in the guide wire provided in an embodiment of the present application, a stop-weld protrusion is provided on the surface of the welding section, the stop-weld protrusion is annular, and the drainage groove is located between the stop-weld protrusion and the head end of the core wire.
[0015] In one possible implementation manner, in the guidewire provided in an embodiment of the present application, the surface of the welding section has a plurality of strip-shaped protrusions, and the drainage groove is formed between two adjacent strip-shaped protrusions. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0017] Figure 1 This is the guide wire schematic diagram in Example 1 of the present application Figure 1 ;
[0018] Figure 2 This is the guide wire schematic diagram in Example 1 of the present application Figure 2 ;
[0019] Figure 3 This is the guide wire schematic diagram in Example 2 of the present application. Figure 1 ;
[0020] Figure 4 This is the guide wire schematic diagram in Example 2 of the present application. Figure 2 ;
[0021] Description of reference numerals:
[0022] 10-core wire;
[0023] 11- welding section;
[0024] 12-drainage trough;
[0025] 13- Strip-shaped protrusions;
[0026] 14- solder stop protrusion;
[0027] 20- Spring. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
[0029] Figure 1 This is the guide wire schematic diagram in Example 1 of the present application Figure 1 ; Figure 2 This is the guide wire schematic diagram in Example 1 of the present application Figure 2 ; Figure 3 This is the guide wire schematic diagram in Example 2 of the present application. Figure 1 ; Figure 4 This is the guide wire schematic diagram in Example 2 of the present application. Figure 2 ;
[0030] See also Figure 1-Figure 4 As shown, the embodiment of the present application provides a guide wire, including a core wire 10 and a spring 20. The core wire 10 has a welding section 11. The outer surface of the welding section 11 has a plurality of drainage grooves 12. Adjacent drainage grooves 12 are equidistantly distributed. The drainage grooves 12 are formed between a plurality of strip protrusions 13 on the surface of the welding section 11, that is, one drainage groove 12 is formed between two adjacent strip protrusions 13. The spring 20 is sleeved on the welding section 11, and the spring 20 is welded to the welding section 11 by the solder filled in the drainage groove 12.
[0031] By setting the drainage groove 12 on the outer surface of the welding section 11, the drainage groove 12 plays a role in guiding the flow of molten solder, so that the molten solder is evenly guided to the preset welding area. By designing the length of the guide groove distribution, the flow distance of the solder on the core wire 10 can be controlled to achieve accurate control of the guide wire welding length. Reduce the performance difference of the guide wire product caused by the difference in solder distribution, and improve the quality stability of the guide wire product.
[0032] In addition, the drainage groove 12 can also increase the "wettability" of the solder on the surface of the core wire 10, which can increase the welding area per unit welding length and improve the welding strength. The drainage groove 12 guides the solder flow, refines the solder grains, greatly reduces welding defects such as poorly filled brazing pores and solder crystallization, and improves the welding strength.
[0033] The drainage method used in the guidewire tip welding can accurately control the length of the weld, while increasing the welding strength per unit length of the guidewire, improving the safety and stability of the weld, shortening the length of the guidewire head weld while ensuring the guidewire breaking force, optimizing the guidewire head design, and expanding the scope of use of the guidewire, allowing the guidewire to enter narrower and more tortuous blood vessels when used. Example
[0034] In the embodiment of the present application, the cross section of the welding section 11 is a polygon, the surface of the welding section 11 has a plane, and the drainage groove 12 is arranged on the plane.
[0035] Specifically, the drainage groove 12 is arranged in at least two ways: obliquely arranged relative to the length direction of the welding section 11 (that is, the drainage groove 12 is an oblique line, see Figure 1 ), or the drainage groove 12 is arranged in a collinear manner relative to the length direction of the welding section 11 (that is, the drainage groove 12 is a straight line, see Figure 2 ).
[0036] Compared with the straight-line drainage groove 12 , the oblique-line drainage groove 12 can further increase the welding area per unit welding length and improve the welding strength.
[0037] Specifically, the surface of the welding section 11 has at least two parallel planes, and the drainage grooves 12 on the two parallel planes are symmetrically arranged. This can ensure that the welding firmness of the two opposite sides of the welding section 11 is equal, and can also improve the quality stability of the guidewire product.
[0038] Specifically, a solder stop protrusion 14 is provided on the surface of the welding section 11, and the drainage groove 12 is located between the solder stop protrusion 14 and the head end of the core wire 10. The solder stop protrusion 14 can prevent the molten solder from flowing further, and can more accurately control the length of the solder joint. Example
[0039] In the embodiment of the present application, the welding section 11 is a cylinder, the surface of the welding section 11 is a cylindrical surface, and the drainage groove 12 is arranged on the cylindrical surface.
[0040] Specifically, the drainage groove 12 is arranged in at least two ways: the drainage groove 12 is arranged in a collinear manner relative to the length direction of the welding section 11 (that is, the drainage groove 12 is a straight line, see Figure 3 ), or, the drainage groove 12 is arranged in a spiral on the cylindrical surface (see Figure 4 ).
[0041] Compared with the straight drainage groove 12 , the spirally arranged drainage groove 12 can further increase the welding area per unit welding length and improve the welding strength.
[0042] Specifically, a stop-weld protrusion 14 is provided on the surface of the welding section 11. The stop-weld protrusion 14 is annular, and the drainage groove 12 is located between the stop-weld protrusion 14 and the head end of the core wire 10. The stop-weld protrusion 14 can prevent the molten solder from flowing further, and can more accurately control the length of the solder joint.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A guide wire, comprising a core wire and a spring, characterized in that: The core wire has a welding section, and the outer surface of the welding section has a plurality of drainage grooves, and adjacent drainage grooves are equidistantly distributed; The spring is sleeved on the welding section, and the spring is welded to the welding section through the solder filled in the drainage groove.
2. The guide wire according to claim 1, characterized in that The surface of the welding section has a plane, the drainage groove is arranged on the plane, and the drainage groove is arranged obliquely relative to the length direction of the welding section.
3. The guide wire according to claim 1, characterized in that The surface of the welding section has a plane, the drainage groove is arranged on the plane, and the drainage groove is arranged in a collinear manner relative to the length direction of the welding section.
4. The guide wire according to claim 2 or 3, characterized in that: The surface of the welding section has at least two planes, and each of the planes is provided with the drainage groove.
5. The guide wire according to claim 4, characterized in that The surface of the welding section has at least two planes parallel to each other, and the drainage grooves on the two planes parallel to each other are symmetrically arranged.
6. The guide wire according to claim 1, characterized in that The surface of the welding section is an arc surface, the drainage groove is arranged on the arc surface, and the drainage groove is arranged in a collinear manner relative to the length direction of the welding section.
7. The guide wire according to claim 1, characterized in that The surface of the welding section is a cylindrical surface, the drainage groove is arranged on the cylindrical surface, and the drainage groove is arranged in a spiral shape on the cylindrical surface.
8. The guide wire according to claim 6 or 7, characterized in that: The welding section is a cylinder.
9. The guide wire according to claim 8, characterized in that A stop-welding protrusion is provided on the surface of the welding section, the stop-welding protrusion is annular, and the drainage groove is located between the stop-welding protrusion and the head end of the core wire.
10. The guide wire according to claim 1, characterized in that The surface of the welding section has a plurality of strip-shaped protrusions, and the drainage groove is formed between two adjacent strip-shaped protrusions.