Flexible multi-layer wrapping type heating wire
By using a flexible, multi-layered, wrapped heating wire structure, the problem of easy breakage of metal wires in traditional heating wires during repeated use is solved, achieving better bending resistance and heat conduction, thus improving the user experience for passengers.
Patent Information
- Application Number
- CN202422274049.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-09-18
AI Technical Summary
Traditional car seat heating wires, when repeatedly bent, stretched, or squeezed, develop significant gaps between the leather and the metal wires, making the metal wires prone to breakage, which affects heating performance and passenger experience.
The heating wire adopts a flexible multi-layer wrapped structure. The metal wire is spirally wrapped around the outside of the central fiber, and the wrapping fiber is spirally wrapped around the outside of the metal wire layer to form a wrapping fiber layer. The wrapping fiber fixes the metal wire and provides flexible protection. The thickness of the wrapping fiber layer is smaller than that of the traditional skin layer, which increases the heat conduction effect.
It improves the bending and tensile strength of the heating wire, reduces the risk of wire breakage, enhances heat conduction efficiency and passenger comfort, and ensures that the heating wire can work normally during repeated use.
Smart Images
Figure CN223503058U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating wire technology, and in particular to a flexible multi-layer wrapped heating wire. Background Technology
[0002] As society develops, passengers have increasingly higher requirements for the comfort and safety of car interiors, so heating, seat belt reminders, massage, ventilation and other equipment are installed in car seats.
[0003] The application of hot stone therapy to car seats provides a therapeutic effect while they are heated, making them popular among passengers. Car seats with hot stone therapy typically have a heating module consisting of heating wires and stones. The stones are in close contact with the heating wires, and the heating wires heat the stones, which then heat the occupant. However, during use, the stones compress the heating wires, causing them to be repeatedly bent, stretched, or compressed. Traditional car seat heating wires generally consist of a central fiber, metal wires, and a plastic sheath. The metal wires are spirally wrapped around the central fiber to form a metal wire layer, and the sheath is placed over the metal wire layer. After repeated bending, stretching, or compression, a significant gap becomes visible between the sheath and the metal wires. The sheath fails to adequately protect the metal wires, making them prone to breakage, resulting in heating failure and affecting the occupant's experience. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flexible, multi-layered, wrapped heating wire.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A flexible multilayer wrapped heating wire includes a central fiber, a metal wire, and wrapping fibers. The metal wire is spirally wrapped around the outside of the central fiber to form a metal wire layer, and the wrapping fibers are spirally wrapped around the outside of the metal wire layer to form a wrapping fiber layer. There are gaps between the wrapping fibers forming the wrapping fiber layer.
[0007] Preferably, the wrapped fiber is a single fiber or multiple fibers. When the wrapped fiber is multiple fibers, untwisted or twisted wrapping can be used, and parallel side-by-side structure can be used for simultaneous wrapping.
[0008] Preferably, the wrapping direction of the metal wire is the same as or opposite to that of the wrapping fiber.
[0009] Preferably, the material of the wrapping fiber is one of aramid, polyarylate, polyester, nylon, and polyimide, and the wire diameter of the wrapping fiber is 5-400μm.
[0010] Preferably, the metal wire can be a bare metal wire, or the outside of the metal wire can be coated with an insulating varnish film.
[0011] The beneficial effects of this utility model are:
[0012] 1. The flexible multi-layer wrapped heating wire proposed in this utility model consists of a wrapping fiber layer formed by spirally wrapping fibers around the outside of a metal wire layer. The wrapping fibers tightly fix the metal wire to the central fiber, and the wrapping fibers themselves are flexible. After repeated bending, stretching, or compression, the distance between the central fiber, the metal wire, and the wrapping fibers does not easily change. The metal wire is not easily broken due to the protection of the wrapping fibers, ensuring normal operation of the heating wire. The heating wire exhibits good bending and tensile strength. The multiple twisted wrapping fibers, with certain gaps between the parallel and wound fibers, contribute to improved bending performance and faster heat diffusion.
[0013] 2. The flexible multi-layer wrapped heating wire proposed in this utility model has a much thinner wrapping fiber layer than the traditional car seat heating wire skin layer, and there are gaps between the fibers. Compared with Teflon and nylon-coated outer skin, the heat conduction effect is better, which can quickly heat the stone to the preset temperature, making it comfortable for passengers and providing good therapeutic effect. Attached Figure Description
[0014] Figure 1 A schematic diagram of the cross-sectional structure of a flexible multi-layer wrapped heating wire proposed in this utility model. Figure 1 ;
[0015] Figure 2 A schematic diagram of the cross-sectional structure of a flexible multi-layer wrapped heating wire proposed in this utility model. Figure 2 ;
[0016] Figure 3 A schematic diagram of the cross-sectional structure of a flexible multi-layer wrapped heating wire proposed in this utility model. Figure 3 .
[0017] In the diagram: 1. Central fiber, 2. Metal wire, 3. Wrapped fiber. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0019] Reference Figure 1-3A flexible multi-layer wrapped heating wire includes a central fiber 1, a metal wire 2 and a wrapping fiber 3. The metal wire 2 is spirally wrapped around the outside of the central fiber 1 to form a metal wire layer, and the wrapping fiber 3 is spirally wrapped around the outside of the metal wire layer to form a wrapping fiber layer. There are gaps between the wrapping fibers 3 forming the wrapping fiber layer.
[0020] The wrapped fiber 3 can be a single fiber or multiple fibers. When the wrapped fiber 3 is multiple fibers, untwisted or twisted wrapping can be used, and parallel side-by-side structure can be used for simultaneous wrapping.
[0021] Figure 1 In the middle, the wrapping fiber 3 is a single fiber; Figure 2 In the middle, the wrapping fiber 3 consists of multiple fibers, which are wrapped independently and arranged in a parallel side-by-side structure; Figure 3 In the middle, the wrapping fiber 3 consists of multiple strands, which are twisted and wrapped together.
[0022] The wrapping direction of the metal wire 2 and the wrapping fiber 3 is the same or opposite.
[0023] The material of the wrapped fiber 3 is one of aramid, polyarylate, polyester, nylon, and polyimide, and the wire diameter of the wrapped fiber 3 is 5-400μm.
[0024] When the wrapping fiber is made of aramid, polyarylate, or polyimide, it can work at temperatures above 150°C for a long time. Moreover, the wrapping fiber does not contain fluorine, making it more environmentally friendly. When the heating wire requires a lower operating temperature, materials such as polyester or nylon can be used.
[0025] The metal wire 2 can be a bare metal wire, or it can be coated with an insulating varnish film on the outside of the metal wire 2.
[0026] The flexible multi-layer wrapped heating wire proposed in this utility model has a wrapping fiber layer formed by spirally wrapping fiber 3 around the outside of the metal wire layer. The wrapping fiber 3 can tightly fix the metal wire 2 to the central fiber 1, and the wrapping fiber 3 itself is flexible. After the heating wire is bent or stretched many times, the distance between the central fiber 1, the metal wire 2 and the wrapping fiber 3 is not easily changed. The metal wire 2 is not easy to break because it is protected by the wrapping fiber 3. The heating wire can be used normally and has good bending and tensile strength.
[0027] The flexible multi-layer wrapped heating wire proposed in this utility model has a wrapping tape 4 wrapped around the outside of the wrapping fiber layer. The wrapping tape 4 can improve the wear resistance and sealing performance of the heating wire, and further extend the service life of the heating wire.
[0028] A method for preparing a flexible multilayer wrapped heating wire includes the following steps:
[0029] First, the metal wire 2 is spirally wrapped around the outside of the central fiber 1 to obtain a metal wire layer. Then, the wrapping fiber 3 is spirally wrapped around the outside of the metal wire layer to obtain a wrapping fiber layer.
[0030] When spirally wrapping the metal wire 2 around the outside of the central fiber 1, first twist the central fiber 1 together, and then wrap the metal wire 2 around the outside of the central fiber 1, or twist the metal wire 2 and the central fiber 1 together at once using a single twister.
[0031] When the metal wire 2 is spirally wound around the outside of the central fiber 1, if the central fiber 1 is tensioned first and then the metal wire 2 is wound around the outside of the central fiber, the metal wire 2 is not subjected to torsional stress during the processing, and the bending resistance of the heating wire is better. When the metal wire 2 and the central fiber 1 are twisted together by a single twisting machine, the processing is simpler, but the metal wire 2 is subjected to a small amount of torsional stress during the twisting process, and the bending resistance is slightly reduced.
[0032] The flexible multi-layer wrapped heating wire proposed in this invention has a much thinner wrapping fiber layer and wrapping tape layer than the leather layer of traditional car seat heating wires, resulting in better heat conduction and faster heating of stones to the preset temperature. This provides comfortable use for passengers and better therapeutic effects.
[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A flexible multilayer wrapped heating wire, comprising a central fiber (1), a metal wire (2), and a wrapping fiber (3), wherein the metal wire (2) is spirally wrapped around the outside of the central fiber (1) to form a metal wire layer, characterized in that, The wrapping fiber (3) is spirally wrapped around the outside of the metal wire layer to form a wrapping fiber layer, and there are gaps between the wrapping fibers (3) forming the wrapping fiber layer.
2. The flexible multi-layer wrapped heating wire according to claim 1, characterized in that, The wrapping fiber (3) can be a single fiber or multiple fibers. When the wrapping fiber (3) is multiple fibers, untwisted wrapping or twisted wrapping can be used, and parallel side-by-side structure can be used for simultaneous wrapping.
3. The flexible multi-layer wrapped heating wire according to claim 1, characterized in that, The wrapping direction of the metal wire (2) is the same as or opposite to that of the wrapping fiber (3).
4. The flexible multi-layer wrapped heating wire according to claim 1, characterized in that, The material of the wrapping fiber (3) is one of aramid, polyarylate, polyester, nylon, and polyimide, and the wire diameter of the wrapping fiber (3) is 5-400μm.