Hard guide wire

Abstract

The utility model discloses a hard guide wire which comprises a metal core, the metal core comprises a main body part and a head end part, the main body part is connected with the head end part, and an inner spring and an outer spring are arranged on the head end part. The hard guide wire is composed of the metal core, the inner spring and the outer spring, the inner spring and the outer spring are arranged at the head end, the outer spring and the metal core are coated with the coatings, the inner spring enhances development, the outer spring increases smoothness, the guide wire of the structure can provide larger supporting force and better pushing force, and the risk that a clinical guide wire is wound with other instruments is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a hard guide wire. Background Art

[0002] The guidewire is one of the main instruments for coronary interventional diagnosis and treatment. The existing hard guidewire products mainly include an inner core and a spring, and the spring is sleeved on the inner core. The guidewire used in auxiliary stent graft or TAVI surgery has the defects of insufficient support and pushing force. Utility Model Content

[0003] Therefore, one purpose of the present invention is to provide a hard guide wire to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A hard guide wire comprises a metal core, wherein the metal core comprises a main body and a head end portion, the main body is connected to the head end portion, and the head end portion is provided with an inner spring and an outer spring.

[0006] Furthermore, the inner spring is wound on the outer surface of the head end by a spring winding machine.

[0007] Furthermore, the outer spring is wound on the outer surface of the inner spring by a spring winding machine.

[0008] Furthermore, a cavity is provided inside the head end, and the inner spring is provided on the inner surface of the cavity.

[0009] Furthermore, the outer spring is arranged on the outer surface of the head end portion.

[0010] Furthermore, one end of the head end portion is connected to the main body portion, and the other end of the head end portion is fixedly provided with a top bead.

[0011] Furthermore, the surface of the outer spring and the surface of the metal core are coated with a coating.

[0012] Therefore, the utility model has the following beneficial effects:

[0013] The utility model discloses a hard guide wire, which is composed of a metal core and an inner spring and an outer spring at the head end. A coating is applied on the outer spring and the metal core part. The inner spring enhances development and the outer spring increases smoothness. The guide wire of this structure can provide greater support force and better pushing force, and reduce the risk of entanglement between clinical guide wires and other instruments.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] In the figure: 1. Metal core; 2. Main body; 3. Head end; 4. Inner spring; 5. Outer spring; 6. Top ball. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1 As shown, a hard guide wire comprises a metal core 1, wherein the metal core 1 comprises a main body 2 and a head end 3, wherein the main body 2 is connected to the head end 3, and an inner spring 4 and an outer spring 5 are arranged on the head end 3.

[0021] As an embodiment, the metal core 1 can be prepared by machining and grinding combined with physical grinding technology.

[0022] As an implementation mode, the metal core 1 can be prepared by a mold forming technology.

[0023] A hard guide wire of the utility model is provided with double springs, the inner spring 4 is used to enhance the development, the outer spring 5 is used to increase the smoothness, and at the same time, the structure of the metal core 1 and the outer spring 5 enhances the support and the pushing force.

[0024] Furthermore, the inner spring 4 is arranged on the outer surface of the head end portion 3 .

[0025] As an implementation manner, the inner spring 4 may be wound by a spring winding machine.

[0026] As an implementation manner, the inner spring 4 may also be woven by a woven machine.

[0027] Furthermore, the outer spring 5 is arranged on the outer surface of the inner spring 4 .

[0028] As an implementation manner, the outer spring 5 is wound by a spring winding machine.

[0029] As an implementation manner, the outer spring 5 is braided by a braiding machine.

[0030] Furthermore, a cavity is provided inside the head end portion 3 of the metal core 1, and the inner spring 4 is provided on the inner surface of the cavity.

[0031] As an implementation manner, the inner diameter of the cavity is smaller than the outer diameter of the head end portion 3 of the metal core 1 .

[0032] As an implementation manner, the inner diameter of the cavity is greater than or equal to the outer diameter of the inner spring 4 .

[0033] As an implementation manner, the inner diameter of the outer spring 5 is greater than the inner diameter of the inner spring 4 .

[0034] As an implementation manner, the inner diameter of the outer spring 5 is greater than or equal to the outer diameter of the inner spring 4 .

[0035] As an implementation manner, the outer diameter of the outer spring 5 is greater than the inner diameter of the inner spring 4 .

[0036] As an implementation manner, the outer diameter of the outer spring 5 is greater than the outer diameter of the inner spring 4 .

[0037] As an implementation manner, the length of the outer spring 5 is equal to the length of the inner spring 4 .

[0038] As an implementation manner, the length of the outer spring 5 is greater than the length of the inner spring 4 .

[0039] As an implementation manner, the length of the outer spring 5 is smaller than the length of the inner spring 4 .

[0040] As an implementation mode, the outer spring 5 and the inner spring 4 are both made of tungsten alloy.

[0041] Furthermore, the outer spring 5 is arranged on the outer surface of the head end portion 3 .

[0042] Furthermore, one end of the head portion 3 is connected to the main body 2 , and a top bead 6 is fixedly provided at the other end of the head portion 3 .

[0043] As an implementation mode, the head end portion 3 and the main body portion 2 are connected by welding.

[0044] As an embodiment, the head end portion 3 and the main body portion 2 are bonded by vulcanization.

[0045] As an embodiment, the top bead 6 is hemispherical in shape.

[0046] As an implementation manner, the diameter of the top bead 6 is equal to the cross-sectional diameter of the head end portion 3 of the metal core 1 .

[0047] As an embodiment, the diameter of the cross section of the head end of the metal core 1 gradually decreases in the direction away from the main body end.

[0048] Furthermore, the outer surface of the outer spring 5 and the outer surface of the metal core 1 are coated.

[0049] As an implementation mode, the material of the coating may be polytetrafluoroethylene.

[0050] As an implementation mode, the main body 2 of the metal core 1 is made of stainless steel, and the head end 3 of the metal core 1 is made of nickel-titanium alloy.

[0051] In order to better understand the hard guide wire of the present invention, the manufacturing process of the hard guide wire of the present invention is described below. However, it should be noted that the manufacturing process of the hard guide wire in the following embodiments is only exemplary and not exclusive. The hard guide wire of the present invention can be manufactured by a variety of methods and technologies.

[0052] In one embodiment, a metal core is prepared by machining and grinding combined with physical grinding technology, the outer and inner spring sheaths are made by winding with a spring winding machine, the end of the guide wire head is shaped by a cold shaping device, the inner spring is fixed to the metal core by glue dispensing, and the outer spring is fixed to the metal core to complete the production.

[0053] The utility model has a simple structure and a low production cost, can effectively improve the support and pushing force of the guide wire, and reduces the risk of entanglement between the clinical guide wire and other instruments.

[0054] In one embodiment, a metal core is prepared by machine mold forming technology, the outer and inner spring sheaths are woven by a braiding machine, the guide wire tip is shaped by a heat treatment process, the inner spring is fixed to the metal core by brazing or plasma welding, and the outer spring is fixed to the metal core to complete the production.

[0055] In one embodiment, a metal core is prepared by machining and grinding combined with physical grinding technology, the outer and inner spring sheaths are wound by a spring winding machine, the guide wire tip is shaped by a cold forming tool, the inner spring is fixed to the metal core by laser welding, and the outer spring is fixed to the metal core to complete the production.

[0056] The utility model discloses a hard guide wire, which is composed of a metal core, an inner spring and an outer spring at the head end; the outer spring and the metal core are coated with a coating; the guide wire of this structure can provide greater supporting force and better pushing force, and reduce the risk of entanglement between the clinical guide wire and other instruments.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] It is not difficult for those skilled in the art to understand that the utility model includes any combination of the utility model content and the specific implementation method part of the above specification and the various parts shown in the drawings. Due to the limited space and to make the specification concise, the various schemes composed of these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0059] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hard guide wire, characterized in that: The invention comprises a metal core (1), wherein the metal core (1) comprises a main body (2) and a head end (3), wherein the main body (2) is connected to the head end (3), and an inner spring (4) and an outer spring (5) are provided on the head end (3); The inner spring (4) is wound on the outer surface of the head end (3) by a spring winding machine; The outer spring (5) is wound on the outer surface of the inner spring (4) by a spring winding machine; A cavity is provided inside the head end portion (3), and the inner spring (4) is provided on the inner surface of the cavity; The outer spring (5) is arranged on the outer surface of the head end portion (3); One end of the head end portion (3) is connected to the main body portion (2), and the other end of the head end portion (3) is fixedly provided with a top bead (6); The surface of the outer spring (5) and the surface of the metal core (1) are coated.

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