CN219832282U - Light soft USB data line - Google Patents

Abstract

The utility model discloses a light soft USB data line, which comprises a line core, a foaming PE middle quilt and a sheath layer, wherein the foaming PE middle quilt is extruded and laminated outside the line core, the sheath layer is coated outside the middle quilt, the line core comprises two signal lines, a ground wire and two power lines, the signal lines comprise conductors and a foaming PE insulating layer, the signal lines are wrapped in parallel on the ground wire by a graphene electromagnetic shielding film, and the two power lines are twisted and then are twisted back to form a cable together with the signal lines and the ground wire after being wrapped in parallel to form the line core. The USB data wire ensures transmission performance, and has the advantages of softness, light weight and small wire diameter.

Description

Light soft USB data line

Technical Field

The present utility model relates to a data cable, and more particularly, to a lightweight flexible USB data cable.

Background

The USB data line is mainly used for connecting the mobile device and the computer to achieve the purpose of data transmission or communication, namely a passage tool for connecting the computer and the mobile device to transmit video, bell sound, pictures and other files. Now, with the development of the electronics industry, the data line has become an indispensable part of our lives. Whereas the conventional data line has two characteristics: 1. most of signal wires are of twisted pair structures, the core wires are easy to crush in the twisting process, unstable transmission is caused, and insulating materials with higher hardness are mostly adopted for solving the problem. 2. In order to improve the electromagnetic interference resistance during data transmission, aluminum foil and a braiding shielding mode are mostly used, so that the whole wire is hard, meanwhile, in order to improve the user satisfaction, the appearance is smooth and round, the sheath layer is made to be thicker, and the outer diameter of the wire is increased.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a light soft USB data wire, which aims to reduce the wire diameter and improve the softness of a cable.

The technical scheme of the utility model is as follows: the utility model provides a soft USB data line of light, includes sinle silk, foaming PE in quilt and restrictive coating, be in the foaming PE by extrusion laminating cladding in outside the sinle silk, the restrictive coating cladding in outside in quilt, the sinle silk includes two signal lines, ground wire and two power cords, the signal line includes conductor and foaming PE insulating layer, the signal line is parallel lapping by graphene electromagnetic shield membrane in the ground wire, two behind the power cord transposition with the parallel lapping the signal line after and the ground wire is untwisted into a cable constitutes the sinle silk.

Further, the conductors of the signal wires are multi-layer stranded bodies with a plurality of metal wires stranded layer by layer outside a central single metal wire, the stranded direction of the multi-layer stranded bodies from the second layer is opposite to the stranded direction of the adjacent inner layer, the stranded pitch is 8-16 times of the stranded outer diameter, and the stranded direction of the outermost layer of the multi-layer stranded bodies is right. The multilayer stranded body structure can improve conductor roundness and reduce electric field distortion.

Further, the number of wires of the conductor of the signal line is 19 or 37.

Further, the conductors of the signal wires are tinned copper wires or bare copper wires with the wire diameters of 0.05-0.08 mm.

Further, the power line comprises an enameled wire conductor and a TPEE insulating layer, and the TPEE insulating layer is coated outside the enameled wire conductor. The insulating paint layer and TPEE of the enameled wire are adopted to form combined insulation, so that the wire diameter is reduced.

Further, the back twist pitch is 25-30 times the twist outer diameter.

Further, the thickness of the sheath layer in the foamed PE is 0.2-0.25 mm, and the thickness of the sheath layer is 0.25-0.3 mm.

Further, the sheath layer is made of TPE or silica gel.

The technical scheme provided by the utility model has the advantages that:

the utility model keeps the signal transmission performance of the USB data wire, simultaneously, the whole cable is very soft, light in weight and small in wire diameter, and is suitable for carrying.

Drawings

Fig. 1 is a schematic cross-sectional structure of a lightweight flexible USB data line according to an embodiment.

Detailed Description

The present utility model is further described below with reference to examples, which are to be construed as merely illustrative of the present utility model and not limiting of its scope, and various modifications to the equivalent arrangements of the present utility model will become apparent to those skilled in the art upon reading the present description, which are within the scope of the utility model as defined in the appended claims.

Referring to fig. 1, the lightweight flexible USB data line of the present embodiment includes, from inside to outside, a core, a foam PE middle cover 1 and a sheath layer 2, where the core includes two signal lines 3, a ground line 4 and two power lines 5, and the two signal lines 3 and the ground line 4 are formed by wrapping a graphene electromagnetic shielding film 6 in parallel and then untwisting the two power lines 5. Each of the parts is described in detail below.

The conductor 31 of the signal line 3 is composed of a plurality of tin-plated copper wires or bare copper wires with diameters of 0.05-0.08 mm. If the conductor 31 is low in roundness, electric field distortion is caused, electric field distribution is affected, so that performance of the wire is reduced, in order to solve the problem, the conductor 31 is formed by twisting 19 or 37 equal number of tinned copper wires or bare copper wires, the center of the conductor is a single copper wire, the outer layer is formed by spirally surrounding a plurality of layers of metal wires, the twisting direction of each layer is opposite to that of the previous layer, the pitch is 8-16 times of the twisting outer diameter, namely, the center layer is 1 metal wire, the first layer is 6, 6 layers are added in each layer, namely, 1+6+12+x are added in each layer, the twisting direction of each layer is opposite, but the outermost layer is required to be right (Z direction). The stranded conductor has stable structure, small outer diameter and round shape.

The signal propagation speed is determined by the dielectric coefficients of the conductor and the insulating material, the faster the propagation speed, the smaller the dielectric coefficient, the insulation of the signal line 3 is the foamed PE insulating layer 32, the physical foaming mode is used, the foaming degree is about 40%, the stability is good, the dielectric coefficient of the material is reduced, the transmission speed is improved, the weight of the wire is reduced, the hardness is softened, and the wire diameter can be relatively reduced.

The two signal wires 3 cancel the pairing process, a parallel lapping process is adopted, the two signal wires 3 and the ground wire 4 are assembled together by a lapping machine, and a graphene electromagnetic shielding film 6 (the graphene electromagnetic shielding film 6 can be manufactured according to the Chinese patent with the application number of 201910470072.5) is adopted for lapping, so that the problem of serious deformation and damage of the foaming PE insulating layer 32 caused by the strain of the pairing core wire is avoided, and the distortion of an electromagnetic field is further reduced. The graphene electromagnetic shielding film 6 is an ultrathin, light, high-strength and heat-conducting electromagnetic interference (EMI) shielding material with high shielding efficiency, and has good mechanical property, bending resistance times up to 10 ten thousand times and electromagnetic shielding efficiency up to 55-65 dB, so that the transmission performance of the cable is better.

In order to reduce the wire diameter of the power wire 5, the power wire 5 adopts a plurality of enameled wire conductors 51 and a TPEE insulating layer 52, and the insulating material adopts TPEE, and the enameled wire conductors 51 are provided with a thin layer of high-voltage resistant insulating paint, so that the TPEE has excellent bending fatigue resistance and other performances and is suitable for being used as a thin-skin wire, thereby reducing the insulating wire diameter of the power wire, and in addition, for enabling the power wire to be softer, 20 percent EVA can be added into the TPEE insulating layer 52 to improve the softness.

The two power lines 5, the two signal lines 4 and the ground line 4 which are wrapped are twisted back by adopting a pitch which is 25-30 times of the twisting outer diameter during cabling, the back twisting is that a wire coil rack provided with a wire paying-off disc keeps the horizontal position all the time by means of a special device (back twisting device) on the wire paying-off disc when a machine rotates, the signal lines 3 and the power lines 5 only receive the deflection effect and do not twist during cabling, the twisted structure is stable, after the cable is combined by back twisting, the wire core has no stress, the deformation and the twisting of the wire core structure are avoided, and meanwhile, the signal lines 3 basically keep a parallel state and do not deform.

Because the cable semi-finished product is not round, the cable core adopts a double-layer extrusion process, and the foamed PE is extruded firstly to be coated outside the cable core by being attached by 1, so that the cable has an obvious round outline, and the thickness is about 0.25 mm. The foaming PE quilt 1 can adopt a chemical foaming mode to reduce the cost, weight and softness of the material. The sheath layer 2 is extruded outside the foaming PE layer 1, the thickness of the sheath layer 2 is about 0.3mm, and soft weather-proof TPE (thermoplastic elastomer) can be used, and softer silica gel material can also be used.

In summary, the light and soft USB data line of the embodiment has small and soft line diameter and is suitable for carrying.

Claims (8)

1. The utility model provides a soft USB data line of light, its characterized in that includes sinle silk, foaming PE in quilt and restrictive coating, be in the foaming PE by extrusion laminating cladding in outside the sinle silk, the restrictive coating cladding in outside the quilt, the sinle silk includes two signal lines, ground wire and two power cords, the signal line includes conductor and foaming PE insulating layer, the signal line is parallel around the package by graphite alkene electromagnetic shield membrane in the ground wire, two after the power cord transposition with the parallel is around the signal line after the package and the ground wire back-twist becomes the cable constitutes the sinle silk.

2. The lightweight flexible USB data cable of claim 1, wherein the conductors of the signal cable are multi-layer twisted bodies of a plurality of wires twisted layer by layer outside a central single wire, the multi-layer twisted bodies are twisted in a direction opposite to a direction of twisting adjacent inner layers from the second layer and have a twist pitch 8 to 16 times a twist outer diameter, and an outermost layer of the multi-layer twisted bodies is twisted in a right direction.

3. The lightweight flexible USB data line according to claim 2, wherein the number of wires of the conductors of the signal line is 19 or 37.

4. The lightweight flexible USB data cable of claim 2, wherein the conductors of the signal cable are tin-plated or bare copper wires of 0.05-0.08 mm wire diameter.

5. The lightweight flexible USB data line according to claim 1, wherein the power line comprises an enameled wire conductor and a TPEE insulating layer, the TPEE insulating layer being coated outside the enameled wire conductor.

6. The lightweight flexible USB data cable of claim 1, wherein the untwisted pitch is 25-30 times the outside diameter of the twist.

7. The lightweight flexible USB data cable of claim 1, wherein the foamed PE has a thickness of 0.2 to 0.25mm and the sheath layer has a thickness of 0.25 to 0.3mm.

8. The lightweight flexible USB data cable of claim 1, wherein the jacket layer is TPE.