USB transmission cable for passenger car
By designing a multi-layer structure USB transmission cable for passenger cars, the problem of avoiding interference and improving shielding performance in narrow spaces is solved, and a smaller cable size and higher shielding performance are achieved.
Patent Information
- Application Number
- CN202421426361.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-21
AI Technical Summary
USB cables for passenger cars need to avoid interference with other components in a narrow wiring space, and also have higher shielding performance.
A USB transmission cable for passenger cars is designed, including a signal wire pair, a power line and a multi-layer structure shielding layer, a braided layer and an outer cover layer. The power line is closely abutted on one side of the signal wire pair, and the signal wire pair is composed of a twisted core wire and an aluminum foil layer.
It achieves a smaller cable size and higher shielding performance, with a shielding attenuation of more than 70dB, avoiding interference from the power cord to the signal cord.
Smart Images
Figure CN222927243U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of cables, and particularly to a USB transmission cable for passenger vehicles. Background Art
[0002] With the development of the automotive industry, the complexity of the automotive E / E architecture and functions is continuously increasing, which brings the need for higher vehicle data transmission bandwidth and changed communication methods. At the same time, with the future trend of intelligentization and networking, the performance requirements for in-vehicle data cables will be getting higher and higher.
[0003] Currently, compared with the wires used in conventional consumer products, the USB cables for passenger vehicles not only need to consider the narrow wiring space but also need to avoid interference with other components in the vehicle during application. Therefore, it is necessary to design a USB cable for passenger vehicles with a smaller size and higher shielding efficiency. Summary of the Utility Model
[0004] To solve the above technical problems, this application provides a USB transmission cable for passenger vehicles, which includes signal wire pairs, several power lines, and a shielding layer, a braided layer, and an outer jacket layer that are sequentially coated on the outer periphery of the signal wire pairs and the power lines. The several power lines are closely abutted against one side of the signal wire pairs. The signal wire pairs include two twisted core wires and an aluminum foil layer coated on the outer periphery of the core wires.
[0005] Preferably, the core wire includes several pairs of twisted tinned annealed soft copper conductors and a first insulating layer coated on the tinned annealed soft copper conductors.
[0006] Preferably, there are 7 tinned annealed soft copper conductors, and their stranding structure is 1 in the center layer and 6 in the outer layer.
[0007] Preferably, there are 2 power lines, which are located on one side of the signal wire pairs.
[0008] Preferably, the power line includes a power conductor and a second insulating layer coated on the power conductor.
[0009] Preferably, the braided layer is woven with tinned copper wires, and the braiding density is not less than 85%.
[0010] Preferably, the shielding layer is made of aluminum foil.
[0011] As can be seen from the above, applying the present application can achieve the following beneficial effects: By providing signal wire pairs, several power lines, and a shielding layer, a braided layer, and an outer sheath layer that are sequentially coated on the outer periphery of the signal wire pairs and the power lines, several power lines are closely abutted against one side of the signal wire pairs. The signal wire pairs include two twisted core wires and an aluminum foil layer coated on the outer periphery of the core wires. During cable stranding, the core wires are first stranded, and after wrapping the aluminum foil layer, signal wire pairs are formed. Then, the signal wire pairs and the power lines are coated with the shielding layer. This structure can not only avoid the interference of the power lines on the signal pairs, but also make the signal pairs and the power lines have smaller gaps after cable stranding, thus ensuring that it not only has the performance of traditional USB wires but also has a smaller cable stranding size. The multi-layer structure of the aluminum foil layer, the shielding layer, and the shielding layer enables the wire to have a higher shielding efficiency for signal transmission, and its shielding attenuation can reach more than 70 dB. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] 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.
[0013] Figure 1 Structural schematic diagram of a USB transmission cable for a passenger car according to an embodiment of the present application;
[0014] Figure 2 Structural schematic diagram of a signal wire pair according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] 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.
[0016] Embodiment
[0017] To solve the above technical problems, this embodiment provides a USB transmission cable for a passenger car, as Figure 1-2As shown, it includes a signal wire pair 10, several power lines 20, and a shielding layer 30, a braided layer 40, and an outer sheath layer 50 that are sequentially coated on the outer periphery of the signal wire pair 10 and the power lines 20. The several power lines 20 are closely abutted against one side of the signal wire pair 10. The signal wire pair 10 includes two twisted core wires 11 and an aluminum foil layer 12 coated on the outer periphery of the core wires 11. When cabling, the core wires 11 are first twisted, and after wrapping the aluminum foil layer 12, the signal wire pair 10 is formed. Then, the signal wire pair 10 and the power lines 20 are coated with the shielding layer 30. This structure can not only avoid the interference of the power lines to the signal pair, but also make the signal pair and the power lines have smaller gaps after cabling, thus ensuring that it not only has the performance of traditional USB wires but also has a smaller cabling size. The multi-layer structure of the aluminum foil layer 12, the shielding layer 30, and the shielding layer 30 enables the wire to have a higher shielding efficiency for signal transmission, and its shielding attenuation can reach more than 70 dB.
[0018] Specifically, the core wire 11 includes several pairs of twisted tinned annealed soft copper conductors 111 and a first insulating layer 112 coated on the tinned annealed soft copper conductor 112. Among them, there are 7 tinned annealed soft copper conductors 111, and their stranding structure is 1 in the center layer and 6 in the outer layer, which can ensure the roundness of the conductor and provide a more stable and uniform medium for signal transmission.
[0019] Furthermore, the dielectric constant of the first insulating layer 112 is 2.25, enabling the signal pair to have lower attenuation. Exemplarily, the first insulating layer 112 is made of modified polypropylene material, while ensuring that the power line has a higher withstand voltage strength, and its flame retardancy and mechanical properties are improved after modification.
[0020] There are 2 power lines 20, which are located on one side of the signal wire pair 10. The power line 20 includes a power conductor 21 and a second insulating layer 22 coated on the power conductor 21. Exemplarily, the material of the second insulating layer 22 can be the same as that of the first insulating layer 112.
[0021] When cabling, the one-time cabling method of a double-twisting machine is adopted. First, the core wires 11 are twisted through the first dividing disk to form a twisting pitch, and the aluminum foil layer 12 is wrapped to form the signal wire pair 10. Then, the signal wire pair 10 and the power lines 20 pass through the second dividing disk at the same time, and then the shielding layer 30 completely coats the signal wire pair 10 and the power lines 20, so that the power lines 20 are closely abutted against one side of the signal wire pair 10, making the signal wire pair 10 and the power lines 20 have smaller gaps after cabling, reducing the cabling size, and then braiding a braided layer 40 and extruding an outer sheath layer 50. Among them, the braided layer 40 is woven with tinned copper wires, and the braiding density is not less than 85%. The shielding layer 30 is made of aluminum foil. The multi-layer structure enables the wire to have a higher shielding efficiency, and its shielding attenuation can reach more than 70 dB.
[0022] In the above solution, the outer sheath 50 of the cable is made of a highly flexible PVC material that can withstand 105°C. The temperature resistance grade of this material can reach -40°C to 105°C. While having high flexibility, the outer sheath thickness of the wire can be made thinner, ensuring that the wire can not only work properly in the harsh environment of the car, but also has a smaller size and bending radius, saving more space during wiring.
[0023] In summary, the solution of this application includes a signal wire pair, several power lines, and a shielding layer, a braided layer, and an outer sheath layer that are sequentially coated on the outer periphery of the signal wire pair and the power lines. The several power lines are closely abutted against one side of the signal wire pair. The signal wire pair includes two twisted core wires and an aluminum foil layer coated on the outer periphery of the core wires. When cabling, the core wires are first twisted, and after wrapping the aluminum foil layer, a signal wire pair is formed. Then, the signal wire pair and the power lines are coated with a shielding layer. This structure can not only avoid interference of the power lines on the signal pair, but also make the signal pair and the power lines have smaller gaps after cabling, ensuring that it not only has the performance of traditional USB cables but also has a smaller cabling size. The multi-layer structure of the aluminum foil layer, the shielding layer, and the shielding layer enables the wire to have a higher shielding efficiency for signal transmission, and its shielding attenuation can reach more than 70 dB.
[0024] The above-described embodiments do not limit the protection scope of the technical solution. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the above embodiments shall be included in the protection scope of the technical solution.
Claims
1. A USB transmission cable for passenger cars, characterized in that: The invention comprises a signal line pair (10), a plurality of power lines (20), and a shielding layer (30), a braided layer (40) and an outer layer (50) which are sequentially coated on the outer periphery of the signal line pair (10) and the power lines (20), wherein the plurality of power lines (20) are tightly abutted against one side of the signal line pair (10), and the signal line pair (10) comprises two twisted core wires (11) and an aluminum foil layer (12) coated on the outer periphery of the core wires (11).
2. The USB transmission cable for passenger cars according to claim 1, characterized in that: The core wire (11) comprises a plurality of twisted tinned annealed soft copper conductors (111) and a first insulating layer (112) covering the tinned annealed soft copper conductors (111).
3. The USB transmission cable for passenger cars according to claim 2, characterized in that: There are seven tinned annealed soft copper conductors (111), and their twisted structure comprises one conductor in the center layer and six conductors in the outer layer.
4. The USB transmission cable for passenger cars according to claim 1, characterized in that: Two power lines (20) are provided and are located on one side of the signal line pair (10).
5. The USB transmission cable for passenger cars according to claim 4, characterized in that: The power line (20) comprises a power conductor (21) and a second insulating layer (22) covering the power conductor (21).
6. The USB transmission cable for passenger cars according to claim 1, characterized in that: The braided layer (40) is braided with tinned copper wires, and the braiding density is not less than 85%.
7. The USB transmission cable for passenger cars according to claim 1, characterized in that: The shielding layer (30) is made of aluminum foil.