A USB2.0 and CAN BUS composite signal line

Abstract

The utility model relates to the technical field of communication cables, in particular to a USB2.0 and CAN BUS composite signal line, comprising a first core wire and a second core wire, a first shielding layer is sheathed on the outer side of the first core wire, and two third core wires are arranged between the first shielding layer and the first core wire; a foamed PP tape is sheathed on the outer side of the second core wire, and a second shielding layer and an outer sheath are wrapped between the first shielding layer and the outer side of the foamed PP tape. The USB2.0 and CAN BUS composite signal line in the utility model can transmit USB2.0 signals and meet the transmission protocol of the CAN BUS bus, and the composite line can reduce the weight of the wire by 30%, and the unified wiring of USB2.0 and CAN BUS can significantly reduce the wiring space, and can meet the current requirements for lightweight and simple vehicle-mounted wires. Secondly, the use of a modified polyvinyl chloride adhesive layer in the outer sheath can effectively reduce the thickness of the wire outer sheath and ensure the extrusion quality.

Description

Technical Field

[0001] The utility model relates to the technical field of communication cables, in particular to a USB2.0 and CAN BUS composite signal line. Background Art

[0002] The vehicle cable is a wire used to connect electronic devices inside the vehicle. It is usually used to connect devices such as the vehicle audio system, vehicle navigation system, and vehicle TV.

[0003] In recent years, with the development of the automobile industry, consumers are pursuing a more comfortable and intelligent in-vehicle experience, which puts higher and higher requirements on the lightweight and space utilization of automobiles. The wiring harness used in the car has an unignorable impact on the weight of the entire vehicle, and the quality of the wiring in the car seriously affects the utilization of the space in the car. Therefore, car companies now have higher requirements for the lightweight and simplicity of the wiring in the car.

[0004] At present, the design of USB2.0 line and CAN BUS bus in the vehicle cable is generally designed and wired independently. However, there are some problems with the separate wiring method: first, the overall weight of the wire is large, which affects the weight of the vehicle. Second, separate wiring will occupy wiring space and cannot meet the lightweight requirements. Therefore, it is necessary to consider how to optimize the design to reduce the weight of the wire and the space occupied by the wiring. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose a USB2.0 and CAN BUS composite signal line.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A USB2.0 and CAN BUS composite signal line is designed, comprising a first core line and a second core line, a first shielding layer is sleeved on the outer side of the first core line, and two third core lines are arranged between the first shielding layer and the first core line;

[0008] The outer side of the second core wire is sheathed with a foamed PP tape, the second shielding layer and the outer layer are wrapped together between the first shielding layer and the outside of the foamed PP tape, and two fourth core wires are arranged between the second shielding layer, the first shielding layer and the foamed PP tape.

[0009] Furthermore, a first ground wire is provided between the first core wire and the first shielding layer, and a second ground wire is provided between the second shielding layer, the first shielding layer and the foamed PP tape.

[0010] Furthermore, the first core wire and the second core wire are each composed of two conductors twisted together, and an insulating layer is provided outside the two conductors.

[0011] Furthermore, it also includes a filling piece, and a plurality of the filling pieces are provided and respectively distributed between the second shielding layer, the first shielding layer and the foamed PP tape.

[0012] Furthermore, the first shielding layer and the second shielding layer are both configured as aluminum foil layers.

[0013] Furthermore, the outer layer is a modified polyvinyl chloride adhesive layer.

[0014] The utility model proposes a USB2.0 and CAN BUS composite signal line, which has the following beneficial effects: the USB2.0 and CAN BUS composite signal line in the utility model can transmit USB2.0 signals and meet the transmission protocol of the CAN BUS bus, and the composite line can reduce the weight of the wire by 30%, the unified wiring of USB2.0 and CAN BUS can significantly reduce the wiring space, and can meet the current requirements for lightweight and simple vehicle-mounted wires, and secondly, the use of a modified polyvinyl chloride adhesive layer in the outer layer can effectively reduce the thickness of the outer sheath of the wire and ensure the extrusion quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a USB2.0 and CAN BUS composite signal line proposed by the utility model.

[0016] In the figure: 1, first core wire; 2, second core wire; 3, filling piece; 4, first shielding layer; 5, third core wire; 6, foamed PP tape; 7, second shielding layer; 8, outer layer; 9, fourth core wire; 10, first ground wire; 11, second ground wire. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Figure 1 An embodiment of the utility model discloses a USB2.0 and CAN BUS composite signal line, specifically, the composite signal line comprises a first core line 1 and a second core line 2, a first shielding layer 4 is sleeved on the outer side of the first core line 1, and two third core lines 5 are arranged between the first shielding layer 4 and the first core line 1;

[0019] The outer side of the second core wire 2 is sheathed with a foamed PP tape 6, and the first shielding layer 4 and the outside of the foamed PP tape 6 are wrapped with a second shielding layer 7 and an outer layer 8. Two fourth core wires 9 are also arranged between the second shielding layer 7, the first shielding layer 4 and the foamed PP tape 6. In order to make the wire lighter and match the impedance at the same time, the foamed PP tape 6 is wrapped with the foamed PP tape during the cabling process. By using a low dielectric constant tape to match the impedance, the core wire diameter can be significantly reduced, thereby reducing the weight of the wire.

[0020] In some embodiments, in the utility model, a first ground wire 10 is arranged between the first core wire 1 and the first shielding layer 4, and a second ground wire 11 is arranged between the second shielding layer 7, the first shielding layer 4 and the foamed PP tape 6. The first ground wire 10 and the second ground wire 11 are respectively used as the ground wires of USB2.0 and CAN BUS bus to provide a safe operating environment for the cable system and prevent problems such as leakage and short circuit in the cable system.

[0021] It should be noted that, in this embodiment, the first core wire 1, the two third core wires 5 and the first ground wire 10 together constitute a USB2.0 line, the second core wire 2 is a CAN BUS bus, and the fourth core wire 9 and the second ground wire 11 are ordinary power wires and ground wires.

[0022] On the basis of the above-mentioned embodiments, the first core wire 1 and the second core wire 2 in the utility model are composed of two mutually twisted conductors, and an insulating layer is arranged on the outside of the two conductors. Of course, the third core wire 5 and the fourth core wire 9 described in this embodiment can refer to the structural setting of the above-mentioned first core wire 1 and the second core wire 2, and are arranged as a conductor plus an insulating layer structure. In the utility model, two mutually twisted core wires are designed to be used as power supply lines, and power supply to electrical devices can be realized after respectively cooperating with the first ground wire 10 and the second ground wire 11.

[0023] In some embodiments, the utility model also includes a filling piece 3, and a plurality of the filling pieces 3 are provided, and are respectively distributed between the second shielding layer 7, the first shielding layer 4 and the foamed PP tape 6. Preferably, four filling pieces 3 are provided in the embodiment, and the filling piece 3 is made of cotton yarn, and its function is to ensure stable support of the cable and stability of the structure, thereby ensuring the stability of performance transmission.

[0024] In addition, in this embodiment, the first shielding layer 4 and the second shielding layer 7 are both set as aluminum foil layers, and the outer coating layer 8 is a modified polyvinyl chloride rubber layer. The use of modified polyvinyl chloride rubber as the outer coating enables it to meet the physical performance requirements of vehicle-mounted wire aging, flame retardancy, etc. at a relatively thin outer coating thickness, thereby achieving a lightweight effect.

[0025] During processing, the CAN BUS line is cabled first, and then the USB2.0 line is cabled. In this process, the USB2.0 signal line and power line are cabled. In order to meet the requirements of the USB2.0 transmission protocol, a suitable pitch is used during cabling to ensure that the wire structure is stable while meeting the performance requirements, and to prevent the wire from being damaged due to a small pitch. Finally, the USB2.0 and CAN BUS semi-finished wires are assembled into a cable, and the USB2.0 wire is de-twisted using a de-twisting machine to prevent the wire from loosening during the cabling process. After the USB2.0 and CAN BUS semi-finished products are assembled into a cable, the wire diameter of the finished product can be significantly reduced, achieving the effect of light weight, simplicity and structural stability.

[0026] In summary, in the utility model, the USB2.0 core wire and the CAN BUS core wire are cabled separately by selecting a suitable pitch, and a foamed PP tape with a smaller dielectric constant is used to wrap the CAN BUS wire to reduce the wire diameter, and the semi-finished products of USB2.0 and CAN BUS are assembled into cables. When cabling, the USB2.0 semi-finished product is pre-twisted to prevent the wire from loosening. By integrating the USB2.0 and CAN BUS wires into an assembly cable, the size of the finished wire can be greatly reduced, making the wire lighter. At the same time, the combination of the two wires can improve the simplicity of wiring and improve the space utilization rate in the vehicle. Secondly, the use of a modified polyvinyl chloride adhesive layer in the outer sheath 8 can effectively reduce the thickness of the outer sheath of the wire and ensure the extrusion quality, and at the same time can meet the mechanical and physical performance requirements for vehicle-mounted wires in ISO 19642.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A USB2.0 and CAN BUS composite signal line, comprising a first core line (1) and a second core line (2), characterized in that: A first shielding layer (4) is sleeved on the outer side of the first core wire (1), and two third core wires (5) are arranged between the first shielding layer (4) and the first core wire (1); The outer side of the second core wire (2) is sheathed with a foamed PP tape (6); the first shielding layer (4) and the outside of the foamed PP tape (6) are wrapped with a second shielding layer (7) and an outer layer (8); and two fourth core wires (9) are arranged between the second shielding layer (7), the first shielding layer (4) and the foamed PP tape (6).

2. The USB2.0 and CAN BUS composite signal line according to claim 1, characterized in that: A first ground wire (10) is arranged between the first core wire (1) and the first shielding layer (4), and a second ground wire (11) is arranged between the second shielding layer (7), the first shielding layer (4) and the foamed PP tape (6).

3. The USB2.0 and CAN BUS composite signal line according to claim 1, characterized in that: The first core wire (1) and the second core wire (2) are both composed of two conductors twisted together, and an insulating layer is provided outside the two conductors.

4. The USB2.0 and CAN BUS composite signal line according to claim 1, characterized in that: It also comprises a filling piece (3), wherein a plurality of the filling pieces (3) are provided and are respectively distributed between the second shielding layer (7), the first shielding layer (4) and the foamed PP tape (6).

5. The USB2.0 and CAN BUS composite signal line according to claim 1, characterized in that: The first shielding layer (4) and the second shielding layer (7) are both configured as aluminum foil layers.

6. The USB2.0 and CAN BUS composite signal line according to claim 1, characterized in that: The outer layer (8) is a modified polyvinyl chloride adhesive layer.

Images