CN1959864A - USB connection cable and its manufacturing process that can be used in high and low temperature and acid-base environment - Google Patents

Abstract

The invention relates to a data transmission line and a manufacturing process thereof, in particular to a USB connecting line used in high and low temperature and acid-base environments and a manufacturing process thereof. The USB connecting wire has high transmission speed, stronger anti-electromagnetic interference and excellent temperature resistance and the manufacturing process thereof. The technical scheme is as follows: the USB connecting wire comprises two power wires and two data signal wires, wherein a single-side aluminum foil layer is wrapped outside the USB connecting wire, a metal braid layer is wrapped outside the single-side aluminum foil layer, and a plastic outer cover is wrapped outside the metal braid layer; the two data signal wires and the ground wire arranged in parallel with the two data signal wires are wrapped in the inner single-side aluminum foil layer together; two glass fiber fillers are arranged outside the inner single-sided aluminum foil layer and in the same layer of the two power lines, and the structures are mutually twisted; the insulating layers of the power line and the data signal line are both made of FEP, and the outer layer of the FEP is made of high-temperature-resistant plastic. The preparation method comprises the following steps: 1) inner wrapping; 2) stranding; 3) wrapping the outer layer; 4) weaving a metal layer; 5) and (6) extruding.

Description

USB connection cable and its manufacturing process that can be used in high and low temperature and acid-base environment

technical field

The present invention relates to a data transmission line for the interconnection or transmission of information or other signals between memory, input/output devices or central processing units and its production process, especially to a USB connection that can be used in high and low temperature and acid-base environments Wire and its manufacturing process.

Background technique

The USB standard has undergone an upgrade from USB1.0 to USB1.1 to USB2.0, and the transmission speed has also increased to 480Mbps, which reflects that people's desire to continuously obtain higher transmission speeds is endless. Micro USB is the latest achievement of the transmission speed up to 5Gbps under this background.

As shown in FIG. 1 and FIG. 2 , it is a schematic diagram of a three-dimensional structure of an existing USB connection cable. It includes two power lines and data signal lines 04 parallel to each other, which are covered with a single-sided aluminum foil layer 03, with the side of the aluminum coating facing outward, and a metal braided layer 02 is wrapped outside the single-sided aluminum foil layer. The braided layer is wrapped with a plastic outer quilt 01. The side provided with the aluminum coating faces outward, effectively transmitting external electromagnetic interference to the metal braiding layer through the aluminum coating, and then grounding through the metal braiding layer. Therefore, the resistance to external electromagnetic interference is strong. However, two of the power lines will also generate internal electromagnetic interference. Obviously, such a structure cannot solve the problem of anti-internal electromagnetic interference.

Computer USB cables used for microcomputer equipment in chemical, metallurgical, aviation, shipbuilding and other enterprises are mostly harsh due to high temperature from 100°C to 200°C or low temperature from -40°C to -100°C, as well as oil pollution or acid and alkali. , resulting in high failure rate and low service life.

How to solve the above problems is the task of the present invention.

Contents of the invention

The technical problem to be solved by the present invention is to provide a USB connection cable with high transmission speed, stronger resistance to electromagnetic interference and superior temperature resistance, which can be used in high and low temperature and acid and alkali environments, and its manufacturing process.

Its technical solution is:

USB cables that can be used in high and low temperature and acid-base environments, including: two power cables and data signal cables, which are wrapped with a single-sided aluminum foil layer, and the side with the aluminum coating faces outward, and the single-sided aluminum foil layer Wrapped with a metal braided layer, the metal braided layer is wrapped with a plastic jacket; it is characterized in that: the ground wire arranged in parallel with the two data signal lines and the two data signal lines are wrapped inside and single-sided In the aluminum foil layer, the side with the aluminum coating faces outward; on the outside of the inner single-sided aluminum foil layer and in the same layer as the two power lines, there are two glass fiber fillers, and the aforementioned structures are twisted with each other; the power supply The material of the insulating layer of the cable and the data signal cable is FEP (polyfluoroethylene), and its outer covering is made of high-temperature-resistant plastic.

The conductors of the ground wire, the two power wires and the two data signal wires are at least five stranded copper cores with equal lay distances; the metal braiding layer is a tinned copper braiding layer.

The conductors of the two power lines and the two data signal lines and the ground wire are seven copper cores.

The outer covering can be fluoroplastic.

The outer cover can also be made of silicone plastic.

The manufacturing process for making a USB connection cable used in high temperature and acid-base environment includes the following steps:

1) Inner wrapping. Set the two data signal lines and the ground line in parallel and wrap them with an inner single-sided aluminum foil layer;

2) Stranding. Twisting two power cords and two glass fiber fillers together with the structure obtained in step 1);

3) Outer wrapping. Wrap the structure obtained in step 2) with a single-sided aluminum foil layer;

4) Woven metal layer. In step 3) the outer braided metal layer of the resulting structure;

5) Push out. The structure obtained in step 4) is extruded from the outside of the plastic.

The present invention has following beneficial effect:

1) The ground wire can transmit the internal electromagnetic interference-transmission harmonics generated during signal transmission between the two data signal lines; since the two data signal lines are wrapped with an inner single-sided aluminum foil layer, it is equipped The coated side faces outward, effectively shielding the electromagnetic interference generated by the external internal power lines. Therefore, the anti-interference performance of the present invention is stronger.

2) The material of the insulating layers of the two power lines and the two data signal lines is FEP. Due to the excellent acid and alkali resistance and temperature change resistance of FEP, the USB connection line that can be used in high temperature and acid and alkali environments of the present invention is also the same. It has excellent acid and alkali resistance and temperature change resistance.

3) Based on the improvement of the conductive structure and the improvement of the dielectric properties of the insulating material, the transmission speed of the present invention is greatly improved. Also due to the filling of the filler, the present invention not only has higher tensile strength but also has a more rounded shape.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Fig. 1 is the three-dimensional structure schematic diagram of background technology;

Fig. 2 is a schematic cross-sectional structure diagram of the background technology;

Fig. 3 is the three-dimensional structure schematic diagram of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the present invention.

Among them: 1. Data signal line 2. Power line 3. Glass fiber filler 4. Ground wire 5. Inner single-sided aluminum foil layer 6. Single-sided aluminum foil layer 7. Metal braided layer 8. Outer cover

Detailed ways

As shown in Figure 3 and Figure 4, the conductors 21 and 11 of the power line 2 and the data signal line 1 and the ground wire 4 are all copper wires with a nominal diameter of 0.37 mm and made of seven wires with a nominal diameter of 0.12 mm and each twisted equally. Core; of course, the nominal diameter of each copper core can be less than 0.12mm, and the corresponding nominal diameter after stranding is also less than 0.37mm. The insulation material of the power line 2 and the data signal line 1 is FEP (perfluoroethylene). The data signal line 1 and the ground line 4 are arranged in parallel, and are wrapped with an inner single-sided aluminum foil layer 5 . After two power lines 2 and two glass fiber fillers 3 are twisted with the structure wrapped in the inner single-sided aluminum foil layer 5, the single-sided aluminum foil layer 6 is wrapped around it, and the side with the aluminum coating faces outward. Then wrap the tin-plated copper braid 7, and finally extrude from the high-temperature-resistant plastic outer quilt 8 with a nominal diameter of 3.20mm. When the ambient temperature is 30°C to 80°C, the material of the outer cover 8 is PVC; when the ambient temperature is 80°C to 105°C, the material of the outer cover 8 is TPE; when the ambient temperature is above 105°C or -40°C to At -100°C, the material of the sheath 8 can be silica gel or fluoroplastic.

As can be seen from the above description, the manufacturing process of the present invention comprises the following steps:

1) Inner wrapping. The two data signal wires 1 and the ground wire 4 are arranged in parallel and wrapped with an inner single-sided aluminum foil layer 5 .

2) Stranding. Two power lines 2 and two glass fiber fillers 3 are twisted together with the structure obtained in step 1).

3) Outer wrapping. Wrap the structure obtained in step 2) with a single-sided aluminum foil layer 6 .

4) Woven metal layer. In step 3) the metal layer 7 is braided outside the resulting structure.

5) Push out. The structure obtained in step 4) is extruded from the plastic jacket 8.

Since the ground wire can transmit the transmission harmonics of the signal transmission line to the ground, and the two data signal lines are surrounded by an inner single-sided aluminum foil layer, and the side with the aluminum coating faces outward, effectively connecting the internal power line to the ground. EMI shielding generated. Therefore, the anti-interference ability of the USB connecting wire that can be used in high and low temperature and acid-base environment of the present invention is stronger; Alkali, temperature-resistant and oil-resistant properties determine that the USB cable of the present invention that can be used in high temperature and acid-base environments has the same excellent performance; due to the improvement of the conductive structure and the improvement of the dielectric properties of the insulating material, the present invention The transmission speed has been greatly improved, which can be increased from the original 480Mbps to more than 5Gbps; also because of the filling of glass fiber filler, the present invention not only has higher tensile strength but also has a more rounded shape.

Claims (6)

1. USB connecting line that can be used under high low temperature and the acid or alkali environment, comprise: two power lines (2) and data signal line (1), its outer single face aluminium foil layer (6) that is surrounded with, be provided with outside the facing of aluminized coating, be wrapped with wire sheathing (7) at this single face aluminium foil layer (6), it is outer by (8) that this wire sheathing (7) is wrapped with plastics; It is characterized in that: single face aluminium foil layer (5) lining in the ground wire (4) that be arranged in parallel with described two single data holding wires (1) and this two single data holding wire (1) are surrounded jointly is provided with outside the facing of aluminized coating; Be provided with two fiber glass packings (3) outside the single face aluminium foil layer (5) and in the same layer of two power lines (2) in described, aforementioned each structure is stranded mutually; The material of the insulating barrier of described power line (2) and data signal line (1) is FEP (polyfluorinated ethylene), and it is outer to be high-temperature resistance plastice by (8).

2. the USB connecting line that can be used under high low temperature and the acid or alkali environment according to claim 1, it is characterized in that: the conductor (21,11) of described ground wire (4) and two power lines (2) and two single data holding wires (1) is at least five stranded copper cores of lay equalization separately; Described wire sheathing (7) is a tinned copper braid.

3. the USB connecting line that can be used under high temperature and the acid or alkali environment according to claim 2 is characterized in that: the conductor (21,11) and the ground wire (4) of described two power lines (2) and two single data holding wires (1) are seven copper cores.

4. the USB connecting line that can be used under high low temperature and the acid or alkali environment according to claim 1 is characterized in that: described outer quilt (8) is fluoroplastics.

5. the USB connecting line that can be used under high low temperature and the acid or alkali environment according to claim 1 is characterized in that: described outer quilt (8) is a silica gel plastics.

6. make the described manufacture craft that can be used for the USB connecting line under high low temperature and the acid or alkali environment of claim 1, may further comprise the steps:

1) holds in; Two single data holding wires (1) and ground wire (4) are be arranged in parallel, it is held with interior single face aluminium foil layer (5);

2) stranded; Two power lines (2) and two fiber glass packings (3) are twisted together with the step 1) resulting structures;

3) outer holding; With step 2) resulting structures holds it with single face aluminium foil layer (6);

4) braided metal layer; Braided metal layer outside the step 3) resulting structures (7);

5) extrusion; With quilt (8) the interior extrusion outside plastics of step 4) resulting structures.

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