Bending-resistant USB flat wire
By designing bending-resistant USB flat lines and using the combined structure of wire and winding layer arranged side by side, the existing USB4 wires have been solved by restricting the outer diameter and poor bending resistance, achieving better EMI effects and wider usage scenarios.
Patent Information
- Application Number
- CN202421489634.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Under the limitation of the external dimensions of the Type C interface, the existing USB4 cable can only meet the standard requirements within 1m, and has poor bending resistance.
A bending-resistant USB flat line is designed, and multiple wires are arranged side by side. Each wire includes a wire group, a shielding layer and a winding layer. The wire group is composed of signal lines, filler strips and ground lines. The winding layer is wrapped with copper wire, and the adjacent wire winding layers are connected in contact and conducting, forming a complete shielding layer.
It has achieved improved bending performance of wires, meeting the requirements of 3 meters in length and 10,000 bending times, and meeting the requirements of 3A current transmission, broadening the product usage scenarios.
Smart Images
Figure CN222927221U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of wire materials, and particularly to a bend-resistant USB flat wire. Background Art
[0002] With the rapid development of computer hardware, the application of USB has increased the speed of data transmission between external devices. The biggest benefit for users from the increased speed is that they can use more efficient external devices. The currently widely used fourth generation, that is, what we usually call USB4. The new specification of USB uniformly uses the Type-C interface. Compared with the previous Type-C, the interface area has been significantly reduced. Limited by the external dimensions of the Type-C interface, the outer diameter of the connecting wire is also controlled to be more suitable for various thin and light device products. However, currently on the market, the USB4 wire is limited by the external dimensions of the Type-C interface, and its outer diameter limit can only meet the standard requirements within 1m, and there is also the problem of poor bend resistance. Content of the Utility Model
[0003] To solve the above technical problems, this application provides a bend-resistant USB flat wire, which includes a plurality of wires arranged side by side and an outer sheath covering the wires. Each wire includes a wire group, a shielding layer and a winding layer covering the outer periphery of the wire group. The wire group includes a plurality of groups of signal wires, a filling strip and a ground wire. The winding layer is wound with copper wires, and the winding layers of two adjacent wires are in contact and electrically connected.
[0004] Preferably, the signal wire includes two twisted core wires, a self-adhesive polyester tape covering the core wires, and an aluminum foil layer covering the self-adhesive polyester tape.
[0005] Preferably, the conductor of the core wire is composed of a plurality of tinned copper wires and nylon wires twisted together.
[0006] Preferably, the twist pitch of the two core wires is 6±1mm.
[0007] Preferably, the surface of the self-adhesive polyester tape in contact with the aluminum foil layer is a glue surface.
[0008] Preferably, the shielding layer uses double-sided aluminum foil, and the aluminum foil layer is electrically connected to the shielding layer and the winding layer.
[0009] Preferably, the winding layer is wound with tinned copper wires into a double-layer structure.
[0010] As can be seen from the above, applying the present application can achieve the following beneficial effects: By arranging the wire rods side by side, each wire rod includes a wire group, a shielding layer and a winding layer wrapped around the outer periphery of the wire group. By splitting, multiple wire rods are formed, and the multiple wire rods are arranged side by side and parallel to form a flat wire structure. The influence of the wire rods on the size becomes smaller, which is more conducive to terminal welding processing and avoids the wire diameter exceeding the dimensional requirements specified in the processing. The wire group includes several groups of signal wires, filling strips and ground wires. The design of the flat wire has a larger internal space. By filling multiple filling strips, the bending resistance of the wire is improved. The winding layer is wound with copper wires, and the winding layers of two adjacent wire rods are in contact and conductive. By using the winding layer to make the multiple wire rods in contact and conductive, the cable forms a complete shielding layer to obtain better EMI effect. While meeting the bending performance, the longest length of the wire can reach 3 meters, and at the same time, it meets the requirements of 3A current transmission and 10,000 times of bending requirements, greatly expanding the product usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0012] Figure 1 Schematic diagram of the bend-resistant USB flat wire according to the embodiment of the present application;
[0013] Figure 2 Schematic diagram of the signal wire according to the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0015] Embodiment
[0016] To solve the above technical problems, this embodiment provides a bend-resistant USB flat wire, as Figure 1As shown in the figure, it includes several wires arranged side by side and an outer sheath layer 10 covering the wires. Each wire includes a wire group, a shielding layer 50 and a winding layer 60 covering the outer periphery of the wire group. By splitting, multiple individual wires are formed, and the multiple wires are arranged side by side and parallel, thus forming a flat wire structure. The size of the wire is reduced due to the influence of the size, which is more conducive to terminal welding processing and avoids the wire diameter exceeding the size requirements specified for Type C processing. The wire group includes several groups of signal wires 20, filling strips 30 and ground wires 40. The flat wire design has a larger internal space. After filling multiple filling strips 30, the bending resistance performance of the wire is improved. The winding layer 60 is wound with copper wires, and the winding layers 60 of adjacent two wires are in contact and conductive. Through the winding layer 60, multiple wires are brought into contact and conductive, so that the cable forms a complete shielding layer to obtain better EMI effect. While meeting the bending performance, the longest length of the wire can reach 3 meters, and at the same time meet the current transmission requirements of 3A and the bending requirements of 10,000 times, greatly expanding the product usage scenarios.
[0017] Specifically, as Figure 2 shown in the figure, the signal wire 20 includes two twisted core wires 21, a self-adhesive polyester tape 22 covering the core wire 21, and an aluminum foil layer 23 covering the self-adhesive polyester tape 22. The aluminum foil layer 23 is a double-sided aluminum foil, and the surface of the self-adhesive polyester tape 22 in contact with the aluminum foil layer 23 is a glue surface. After the two core wires 21 are twisted, the self-adhesive polyester tape 22 is first wrapped around, and the glue surface of the self-adhesive polyester tape 22 faces outward, so as to bond the outer aluminum foil layer 23, avoid the aluminum foil from loosening, improve the stability of the wrapped structure, and at the same time, wrapping the self-adhesive polyester tape 22 first can reduce the insulation wire diameter of the signal wire, reduce the material consumption and lower the cost.
[0018] Furthermore, the conductor of the core wire 21 is composed of several tinned copper wires and nylon wires twisted together. The flat wire structure design can make the internal space larger. When the tinned copper wires are twisted, multiple nylon wires can be selected to be added, making the wire more flexible while providing conductor strength and bending resistance performance. At the same time, due to the larger internal space of the overall flat wire design of the wire, the requirement for the insulation outer diameter of the core wire 21 is not high, and compared with round wires, PP materials with more price advantages can be used.
[0019] Furthermore, in the above solution, the twist pitch of the two core wires 21 is 6±1mm, and the preferred twist pitch is 6mm. The small pitch design improves the bending resistance performance of the signal wire. Each wire also includes a power line.
[0020] In the above solution, the shielding layer 50 of each wire uses double-sided aluminum foil, so that the aluminum foil layer 23 is electrically connected to the shielding layer 50 and the winding layer 60, thereby forming a complete shielding layer and obtaining a better shielding effect to improve the EMI performance of the wire. Among them, the winding layer 60 is wound into a double-layer structure with tinned copper wires. The winding layers 60 of two adjacent wires are in contact and electrically connected. At the same time, the wound tinned copper wires can be used as GND. The longest length of the wire can reach 3 meters while meeting the current transmission requirement of 3A. Further, the outer sheath layer 10 uses a high-elastic TPE material with a temperature resistance of -40 to 80°C and a hardness of 75A to fix and protect the overall structure and form a complete wire.
[0021] In summary, the solution of the present application forms a flat wire structure by arranging wires side by side. Each wire includes a wire group, a shielding layer and a winding layer wrapped around the outer periphery of the wire group. By splitting, multiple wires are formed, and the multiple wires are arranged side by side and parallel. The influence of the wire size is reduced, which is more conducive to terminal welding processing and avoids the wire diameter exceeding the dimensional requirements specified in the processing. The wire group includes several groups of signal wires, filling strips and ground wires. The flat wire design has a larger internal space. By filling multiple filling strips, the bending resistance performance of the wire is improved. The winding layer is wound with copper wires, and the winding layers of two adjacent wires are in contact and electrically connected. The multiple wires are electrically connected through the winding layer, so that the cable forms a complete shielding layer to obtain a better EMI effect. While meeting the bending performance, the longest length of the wire can reach 3 meters, while meeting the current transmission requirement of 3A and the bending requirement of 10,000 times, greatly expanding the product usage scenarios.
[0022] The above-described embodiments do not limit the protection scope of the technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the above embodiments shall be included in the protection scope of the technical solution.
Claims
1. A bending-resistant USB flat cable, characterized in that: The invention comprises a plurality of wires arranged side by side, and an outer layer (10) covering the wires, each of the wires comprises a wire group, and a shielding layer (50) and a winding layer (60) covering the outer periphery of the wire group, the wire group comprises a plurality of groups of signal wires (20), a filling strip (30) and a ground wire (40), the winding layer (60) is formed by winding copper wire, and the winding layers (60) of two adjacent wires are in contact and conductive.
2. The bending-resistant USB flat cable according to claim 1, characterized in that: The signal line (20) comprises two twisted core wires (21), a self-adhesive polyester tape (22) wrapped around the core wires (21), and an aluminum foil layer (23) wrapped around the self-adhesive polyester tape (22).
3. The bending-resistant USB flat cable according to claim 2, characterized in that: The conductor of the core wire (21) is formed by twisting a plurality of tinned copper wires and nylon wires.
4. The bending-resistant USB flat cable according to claim 2, characterized in that: The twist pitch of the two core wires (21) is 6±1 mm.
5. The bending-resistant USB flat cable according to claim 2, characterized in that: The surface of the self-adhesive polyester tape (22) in contact with the aluminum foil layer (23) is an adhesive surface.
6. The bending-resistant USB flat cable according to claim 2, characterized in that: The shielding layer (50) is made of double-sided aluminum foil, and the aluminum foil layer (23) is electrically connected to the shielding layer (50) and the winding layer (60).
7. The bending-resistant USB flat cable according to claim 1, characterized in that: The winding layer (60) is made of tinned copper wire wound into a double-layer structure.