Multifunctional spring wire for mobile central control display screen of automobile

Abstract

The utility model relates to the technical field of cables, in particular to a multifunctional spring wire for an automobile mobile central control display screen. Comprising a signal line group and a plurality of power lines, the signal line group comprises four signal core wires of a star-quad structure, an aluminum foil shielding layer, a braided shielding layer and an inner coating layer, the signal core wires are sequentially coated with the aluminum foil shielding layer, the braided shielding layer and the inner coating layer, and after being cabled, the wire rods are wound and shaped to form a spring wire. The cabling design of the signal line group and the power line is adopted, so that the wire has a power supply function and a signal transmission function, one wire has multiple functions, the star-quad structure has a smaller cable outer diameter and weight, the flexibility of the wire can be improved, the wire has a smaller bending radius and better bending fatigue resistance, the wire has a more flexible and stable structure, and the service life of the wire is prolonged. After the spring wire is manufactured, the signal group structure is still kept stable, and the signal transmission is not influenced by the winding spring. The spring wire structure can reduce the stretching effect of the central control display screen on the wire during position movement, and the wire laying space can be greatly reduced.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a multifunctional spring wire for a mobile central control display screen of an automobile. Background Art

[0002] Existing car display screens mostly use Line, Can, LVDS, etc. for data transmission, with slow transmission rate and poor signal stability. With the continuous development and iteration of intelligent driving of automobiles, many smarter multimedia audio and video systems have emerged, among which many models have launched movable central control display screens. Due to the continuous improvement of their functions, traditional twisted pair data cables have shown shortcomings in terms of laying, function, reliability, etc. Therefore, it is necessary to propose a multifunctional spring cable for mobile central control display screens of automobiles to solve the existing data cable usage needs. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a multifunctional spring wire for a mobile central control display screen of a car, comprising a signal wire group and several power wires twisted into a cable, a tape layer and an outer sheath wrapped around the periphery of the signal wire group and the power wire, and a filling layer is filled in the gap between the tape layer and the signal wire group and the power wire. The signal wire group comprises 4 signal core wires with a star-twisted structure, an aluminum foil shielding layer, a braided shielding layer and an inner sheath sequentially wrapped around the signal core wires. After the wires are cabled, they are wound and shaped to form a spring wire.

[0004] Preferably, the cabling pitch of the signal line group and the plurality of power lines is 100-110 mm.

[0005] Preferably, the star-twisted pitch of the four signal core wires is 30-33 mm.

[0006] Preferably, the signal core wire comprises a plurality of co-core twisted tinned annealed soft copper conductors and a first insulating layer covering the tinned annealed soft copper conductors, and the wire diameter thereof is 1.16-1.2 mm.

[0007] Preferably, the power cord comprises a plurality of co-core twisted tinned copper wires and a second insulating layer covering the tinned copper wires, and the thickness of the second insulating layer is 0.25-0.3 mm.

[0008] Preferably, 19 tinned copper wires are used to form a three-layer twisted structure, wherein the twisted structure comprises 1 tinned copper wire in the center layer, 6 tinned copper wires in the middle layer, and 12 tinned copper wires in the outer layer.

[0009] Preferably, the wrapping layer is a layer of 0.04 mm thick paper tape wrapped around the periphery of the signal line group and the power line.

[0010] Preferably, the spring wire comprises a spring segment and a straight segment, the straight segment is formed at both ends of the spring segment, the length of the spring segment is 80-100 mm, the length of the straight segment is 680-720 mm, and the outer diameter of the spring segment is 30-40 mm.

[0011] Preferably, the stretchable length of the spring wire is greater than 210 mm.

[0012] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: including a signal line group and several power lines, the signal line group includes 4 signal core wires of star-twisted structure, an aluminum foil shielding layer, a braided shielding layer and an inner layer sequentially coated on the signal core wire, and the wires are formed into spring wires by winding and shaping after being cabled. The cable design of the signal line group and the power line is adopted, so that the wires have both power supply function and signal transmission function, realize the multi-function of one wire, and save the wire harness processing process. The star-twisted structure has a smaller cable outer diameter and weight than the traditional twisted pair structure, and can improve the softness of the wire, have a smaller bending radius and better bending fatigue resistance, so that the wire has a softer and more stable structure, ensuring that the signal group structure remains stable after being made into a spring wire, and the signal transmission is not affected by the winding spring. After the wires are cabled, the spring wire structure is formed, which can reduce the tensile effect of the central control display screen on the wire when it moves, so that the wire has a longer service life. At the same time, the spring wire will be shorter than the conventional wire application, which can greatly reduce the wire laying space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0014] Figure 1 This is a cross-sectional view of a multifunctional spring wire used for a mobile central control display screen of a car according to an embodiment of the present application.

[0015] Figure 2 This is a schematic diagram of the multifunctional spring wire structure used for a mobile central control display screen of a car according to an embodiment of the present application. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] Example

[0018] In order to solve the above technical problems, this embodiment provides a multifunctional spring wire for a mobile central control display screen of a car, such as Figure 1 As shown, it includes a signal line group and several power lines 50 twisted into a cable, a tape layer 60 and an outer layer 70 wrapped around the outer periphery of the signal line group and the power line 50, and a filling layer 80 is filled in the gap between the tape layer 60 and the signal line group and the power line 50. The signal line group includes 4 signal core wires 10 of a star-twisted structure, an aluminum foil shielding layer 20, a braided shielding layer 30 and an inner layer 40 sequentially wrapped around the signal core wires 10. After the wires are cabled, they are formed into spring wires by winding. The cable design of the signal line group and the power line 50 enables the wires to have both power supply and signal transmission functions, realizes a multi-function of one wire, and saves the wire harness processing process. The star-twisted structure has a smaller cable outer diameter and weight than the traditional twisted pair structure, and can improve the flexibility of the wire, have a smaller bending radius and better bending fatigue resistance, so that the wire has a softer and more stable structure, ensuring that the signal group structure remains stable after being made into a spring wire, and the signal transmission is not affected by the winding spring. After the wires are cabled, a spring wire structure is formed, which can reduce the stretching effect of the central control display on the wires when the position is moved, thereby making the wires have a longer service life. At the same time, the spring wire is shorter than conventional wires, which can greatly reduce the space for wire laying.

[0019] Specifically, the cable pitch of the signal line group and the power lines 50 is 100-110 mm. Two power lines 50 are provided, and the cable pitch of the signal line group and the power lines 50 is 100 mm. The tape layer 60 uses a layer of paper tape with a thickness of 0.04 mm to wrap around the outer periphery of the signal line group and the power lines 50, and the signal line group and the power lines 50 are tied tightly to ensure that the cabled wires are round and soft. The gap between the tape layer 60 and the signal line group and the power lines 50 is filled with a filling layer 80, and the filling layer 80 is soft cotton yarn.

[0020] Furthermore, the star-twisted pitch of the four signal core wires 10 is 30-33mm. The signal core wires 10 are cabled in a star-twisted manner, which can make the wire have a smaller bending radius and better bending fatigue resistance, and the four signal core wires 10 adopt a star-twisted manner to have a more stable structure, providing a more stable transmission medium for high-frequency signal transmission. The star-twisted pitch is 30mm, which ensures that there is no resonance before attenuation of 3GHz, and the high-frequency performance of the wire can still be guaranteed after repeated twisting 100,000 times.

[0021] Furthermore, the signal core wire 10 includes a plurality of co-core twisted tinned annealed soft copper conductors 11 and a first insulating layer 12 covering the tinned annealed soft copper conductors 11, and the wire diameter is 1.16-1.2mm. It can achieve a matching impedance of 100Ω and high-speed and stable signal transmission. A co-core twisted structure of 7 tinned annealed soft copper conductors 11 is adopted, and the twisted structure is a central layer with 1 tinned annealed soft copper conductor 11, and the outer layer is 6 tinned annealed soft copper conductors 11. The 7 co-core twisted conductors are softer and rounder, ensuring the high flexibility of the wire while providing a uniform and stable transmission medium for high-speed signal transmission. The material of the first insulating layer 12 is modified polypropylene, and its temperature resistance level can reach 105°C, and the relative dielectric constant is 2.25, ensuring high-speed and stable signal transmission.

[0022] Furthermore, the power cord 50 includes a plurality of co-core twisted tinned copper wires 51 and a second insulating layer 52 covering the tinned copper wires 51, and the thickness of the second insulating layer 52 is 0.25-0.3 mm. The second insulating layer 52 is made of a cross-linked polyolefin material with a volume resistivity of 1012Ω*m. The temperature resistance of the material after cross-linking can reach 125°C, and it has excellent electrical properties and high temperature resistance. The thickness of the second insulating layer 52 can be designed to be 0.25 mm, so that the overall wire has a smaller size, and its electrical safety can still be guaranteed after being wound into a spring wire.

[0023] In the above scheme, 19 tinned copper wires 51 are provided to form a three-layer twisted structure, wherein the twisted structure has 1 tinned copper wire 51 in the center layer, 6 tinned copper wires 51 in the middle layer, and 12 tinned copper wires 51 in the outer layer. Its structure is more rounded and soft, and while meeting its power supply requirements, it can maximize the softness of the finished spring wire.

[0024] The double-layer shielding structure is more effective in preventing interference from external signals, and the shielding attenuation is not less than 55dB, thereby ensuring stable signal transmission. The braided shielding layer 30 is woven with 16 ingots of annealed soft copper wire.

[0025] The outer layer 70 is made of modified polyurethane elastomer with a temperature resistance of 125°C, which makes the outer layer 70 have strong plasticity and high elasticity, which can ensure that the spring wire has a better shaping effect. In addition, it has excellent oil resistance, acid and alkali resistance, flame retardancy, etc., ensuring that the wire has super high reliability in automotive applications.

[0026] Furthermore, the cabled wire is wound on a test rod with a diameter of 20 mm, and after winding 12 turns, it is heated at high temperature to be shaped to form a spring wire. Figure 2As shown, the spring wire includes a spring segment and a straight segment. The straight segments are located at both ends of the spring segment. The length of the spring segment is 80-100mm, the length of the straight segment is 680-720mm, and the diameter of the spring segment is 30-40mm. Preferably, the length of the spring segment is 90mm, the length of the straight segment is 700mm, and the diameter of the spring segment is 35mm. The stretchable length of the spring wire is greater than 210mm. The straight segments at both ends of the spring segment are used to connect between devices. The spring wire of this solution can not only ensure that the central control screen has higher fatigue resistance when moving, enhance the service life of the mobile wire, but also save the space occupied by installation and laying.

[0027] In summary, the present application includes a signal line group and several power lines. The signal line group includes 4 signal cores of a star-twisted structure, an aluminum foil shielding layer, a braided shielding layer and an inner layer sequentially coated on the signal cores. After the wires are cabled, they are formed into spring wires by winding and shaping. The cabling design of the signal line group and the power line is adopted, so that the wires have both power supply and signal transmission functions, realizing a multi-function of one wire and eliminating the wiring harness processing procedure. The star-twisted structure has a smaller cable outer diameter and weight than the traditional twisted pair structure, and can improve the flexibility of the wire, have a smaller bending radius and better bending fatigue resistance, so that the wire has a softer and more stable structure, ensuring that the signal group structure remains stable after the spring wire is made, and the signal transmission is not affected by the winding spring. After the wires are cabled, a spring wire structure is formed, which can reduce the tensile effect of the central control display screen on the wire when it moves, so that the wire has a longer service life. At the same time, the spring wire will be shorter than the conventional wire application, which can greatly reduce the wire laying space.

[0028] The above-mentioned implementation modes do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-mentioned implementation modes shall be included in the protection scope of the technical solution.

Claims

1. A multifunctional spring wire for a mobile central control display screen of a car, characterized in that: The invention comprises a signal wire group and a plurality of power wires (50) twisted into a cable, a tape layer (60) and an outer sheath (70) wrapped around the outer periphery of the signal wire group and the power wire (50), a filling layer (80) filling the gap between the tape layer (60) and the signal wire group and the power wire (50), the signal wire group comprises four signal core wires (10) of a star-twisted structure, an aluminum foil shielding layer (20) sequentially wrapped around the signal core wires (10), a braided shielding layer (30) and an inner sheath (40), and the wires are formed into a spring wire by winding and shaping after being cabled.

2. The multifunctional spring wire for a mobile central control display screen of a car according to claim 1, characterized in that: The cable pitch of the signal line group and the plurality of power lines (50) is 100-110 mm.

3. The multifunctional spring wire for a mobile central control display screen of a car according to claim 2, characterized in that: The star-twisted pitch of the four signal core wires (10) is 30-33 mm.

4. The multifunctional spring wire for a mobile central control display screen of a car according to claim 1, characterized in that: The signal core wire (10) comprises a plurality of co-core twisted tinned annealed soft copper conductors (11) and a first insulating layer (12) covering the tinned annealed soft copper conductors (11), and the wire diameter is 1.16-1.2 mm.

5. The multifunctional spring wire for a mobile central control display screen of a car according to claim 1, characterized in that: The power cord (50) comprises a plurality of co-core twisted tinned copper wires (51) and a second insulating layer (52) covering the tinned copper wires (51); the second insulating layer (52) has a thickness of 0.25-0.3 mm.

6. The multifunctional spring wire for a mobile central control display screen of a car according to claim 5, characterized in that: There are 19 tinned copper wires (51) forming a three-layer twisted structure, wherein the twisted structure comprises a central layer with one tinned copper wire (51), a middle layer with six tinned copper wires (51), and an outer layer with 12 tinned copper wires (51).

7. The multifunctional spring wire for a mobile central control display screen of a car according to claim 2, characterized in that: The wrapping tape layer (60) is a layer of paper tape with a thickness of 0.04 mm wrapped around the outer circumference of the signal line group and the power line (50).

8. The multifunctional spring wire for a mobile central control display screen of a car according to claim 1, characterized in that: The spring wire comprises a spring segment and a straight segment, the straight segment is formed at both ends of the spring segment, the length of the spring segment is 80-100 mm, the length of the straight segment is 680-720 mm, and the outer diameter of the spring segment is 30-40 mm.

9. The multifunctional spring wire for a mobile central control display screen of a car according to claim 8, characterized in that: The stretchable length of the spring wire is greater than 210 mm.

Images