Bending fatigue resistant data transmission cable

Abstract

The utility model discloses a bending fatigue resistant data transmission cable, which comprises a signal pair, two power lines and a plurality of conductors, the signal pair comprises two signal lines, the plurality of conductors axially penetrate through the signal lines and the power lines, and the two power lines and the signal pair are arranged side by side; comprising an outer coating layer, water-blocking yarn and a water-blocking tape, the water-blocking yarn is located between the water-blocking tape and the outer coating layer, and the outer coating layer wraps the signal pairs and the two power lines; according to the utility model, the water-blocking yarns and the water-blocking tape are added to reduce the corrosion of water to the cable, and the waterproof performance of the cable is improved.

Description

Technical Field

[0001] This utility model relates to the field of wire technology, and in particular to a data transmission cable that is resistant to bending fatigue. Background Technology

[0002] A standard USB cable consists of a pair of signal wires and two power transmission wires. Due to size limitations, most USB cables use 28AWG wire gauge or smaller. This makes the cables prone to conductor breakage and material fatigue during use, leading to signal loss and transmission interruptions.

[0003] The data transmission requirements under special working conditions and harsh environments place higher demands on cables. Designing cables that meet common industrial requirements, such as water pressure resistance, waterproofing, dustproofing, fatigue bending resistance, and drag chain resistance, presents new challenges for material selection and structure. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bending fatigue resistant data transmission cable, including a signal pair, two power lines and multiple conductors, wherein the signal pair includes two signal lines, and the multiple conductors axially penetrate the signal lines and the power lines, and the two power lines are installed side by side with the signal pair; it includes an outer sheath, water-blocking yarn and water-blocking tape, wherein the water-blocking yarn is located between the water-blocking tape and the outer sheath, and the outer sheath wraps around the signal pair and the two power lines.

[0005] Preferably, it includes a shielding layer and an insulating layer, the shielding layer being positioned between the insulating layer and the outer sheath, and the insulating layer wrapping around the signal pair and the two power lines.

[0006] Preferably, it includes three fillers, which are fitted into the gaps between the signal pair, the power line, and the insulation layer.

[0007] Preferably, the signal line includes signal insulation that wraps around the outside of the conductor of the signal line.

[0008] Preferably, the power cord includes power insulation that wraps around the outside of the conductor of the power cord.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. Adding water-blocking yarn and water-blocking tape reduces water erosion on the cable and improves the cable's waterproof performance. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of an embodiment of the present utility model.

[0012] Figure 2 This is a schematic diagram of the signal pair structure according to an embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of the power cord structure according to an embodiment of the present invention.

[0014] In the diagram, 1. Outer sheath, 2. Shielding layer, 3. Insulation layer, 4. Signal insulation, 5. Power insulation, 6. Power line, 7. Filler, 8. Signal pair, 9. Water-blocking tape, 10. Conductor, 11. Water-blocking yarn, 12. Signal line. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-3 The bending fatigue resistant data transmission cable includes a signal pair 8, two power lines 6, and multiple conductors 10. The signal pair 8 includes two signal lines 12, and the multiple conductors 10 axially pass through the signal lines 12 and the power lines 6. The two power lines 6 are installed side by side with the signal pair 8. The cable includes an outer sheath 1, a water-blocking yarn 11, and a water-blocking tape 9. The water-blocking yarn 11 is located between the water-blocking tape 9 and the outer sheath 1. The outer sheath 1 wraps around the signal pair 8 and the two power lines 6. The smaller the diameter of the conductor filament and the smaller the twist pitch, the more flexible the conductor becomes. However, for ultra-flexible types or specifications with bending and twisting cycles exceeding hundreds of thousands, the conventional design of reducing the diameter of the filament and adding Kevlar fiber filaments can no longer meet the requirements. At this point, we need to consider copper alloy conductors with greater flexibility. Currently available copper alloy conductors mainly include copper-tin alloy, copper-magnesium alloy, and copper-silver alloy. Considering their performance and price, this solution ultimately chooses copper-tin alloy. Although copper-magnesium alloy has higher tensile strength, it is more expensive. Copper-silver alloy has better electrical properties, but for USB cables with less stringent requirements, we can directly choose copper-tin alloy. Since resistance requirements are not a concern, we can consider using copper-clad steel conductors to increase flexibility. Compared to copper alloy products, this solution can further improve cost advantages and meet special operating conditions. Considering its resistance to environmental aging and durability, we choose thermoplastic elastomers to increase the cable's resistance to scratches and sunlight exposure. Adding water-blocking yarn and water-blocking tape reduces water erosion and improves the cable's waterproof performance.

[0017] like Figure 1-3It includes a shielding layer 2 and an insulation layer 3. The shielding layer 2 is sandwiched between the insulation layer 3 and the outer sheath layer 1. The insulation layer 3 wraps around the signal pair 8 and the two power lines 6. Conventional structures use braided layers. Regardless of whether tin-plated copper, copper alloy, or copper-clad steel is used, as testing progresses, the braided layer is subjected to strong friction between the braided strands, which can lead to severe damage to the braided layer. We chose aluminum foil shielding, which has better flexibility, to make the cable more compact.

[0018] like Figure 1-3 It includes three fillers 7, which are inserted into the gaps between the signal pair 8, the power line 6 and the insulation layer 3; the fillers ensure the stability of the internal structure and increase the pressure resistance.

[0019] like Figure 1-3 The signal line 12 includes signal insulation 4, which is wrapped around the conductor 10 of the signal line 12. Considering the signal transmission requirements, the material selection must be a material with a dielectric constant of less than 2.5. Currently available materials include PE, PP, FEP, etc. Also considering the price advantage of the product, this solution selects PP material. FEP is expensive, and PE is relatively harder and less flexible than PP.

[0020] like Figure 1-3 The power cord 6 includes power insulation 5, which is wrapped around the conductor 10 of the power cord 6. The dielectric constant of the power cord does not need to be considered, so PVC material with good flexibility can be directly selected, which can also greatly reduce the cost.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bend-fatigue-resistant data transmission cable, characterized by: It includes a signal pair (8), two power lines (6) and multiple conductors (10). The signal pair (8) includes two signal lines (12). The multiple conductors (10) axially pass through the signal lines (12) and the power lines (6). The two power lines (6) are installed side by side with the signal pair (8). It includes an outer sheath (1), a water-blocking yarn (11) and a water-blocking tape (9), the water-blocking yarn (11) being located between the water-blocking tape (9) and the outer sheath (1), and the outer sheath (1) wrapping around the signal pair (8) and the two power lines (6).

2. The bend-fatigue-resistant data transfer cable of claim 1, wherein: It includes a shielding layer (2) and an insulating layer (3), the shielding layer (2) being positioned between the insulating layer (3) and the outer sheath (1), and the insulating layer (3) being wrapped around the signal pair (8) and the two power lines (6).

3. The bend- fatigue-resistant data transfer cable of claim 2, wherein: It includes three fillers (7), which are fitted into the gaps between the signal pair (8), the power line (6) and the insulation layer (3).

4. The bend-fatigue-resistant data transfer cable of claim 3, wherein: The signal line (12) includes signal insulation (4) which wraps around the conductor (10) of the signal line (12).

5. The bend- resistant, fatigue-resistant data transmission cable of claim 4, wherein: The power line (6) includes power insulation (5) which wraps around the conductor (10) of the power line (6).

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