Bending-resistant light microphone shielding cable

Abstract

The utility model discloses a bending-resistant light microphone shielding cable, which comprises a cable core, a first electrical isolation layer is wrapped on the cable core, a shielding wire core layer is wrapped on the first electrical isolation layer, and a second electrical isolation layer and a polyurethane protection layer are sequentially arranged outside the shielding wire core layer, the cable core comprises a twisted conductive cable, four insulating cables, a first aramid yarn and cotton yarn. Since the gold-covered wires formed by flattening and annealing a plurality of strands of fine tinned round copper wires and miniature hard copper wires and then wrapping the tinned round copper wires and the miniature hard copper wires on the fibers are adopted outside the cable core, and the shielding layer is formed by weaving composites of the copper wires and the gold-covered wires at uniform intervals, the electrical insulation performance and the bending performance of the cable can be improved, and the service life of the cable is prolonged. And the shielding net or the insulating wire core is not damaged to form a cable core when the sheath of the cable is stripped, so that the cable can be more resistant to bending while the conduction function of the cable is met, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cable manufacturing, in particular to a light and bend-resistant microphone shielded cable. Background Art

[0002] Most of the existing transceiver cables use pure copper wires as conductors, and the outside is coated with insulating materials to protect the internal metal wires for signal transmission purposes, which cannot meet the actual use requirements. With the rapid development of electronic information, improving the bend resistance of transceiver products has become an urgent problem to be solved. The use environment of its signal cable is interfered by various electromagnetic signals, and it is required that the cable is suitable for multi-channel signal transmission, has a certain number of bend resistance times, is light in weight, and can transmit signals for airborne equipment with a temperature range of -50°C to 150°C. It can be seen that the existing signal cables are difficult to meet the requirements. Content of the Utility Model

[0003] Aiming at the above defects or deficiencies, the purpose of the utility model is to provide a light and bend-resistant microphone shielded cable.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A light and bend-resistant microphone shielded cable, comprising: a cable core, a first electrical isolation layer is wrapped on the cable core, a shielded wire core layer is wrapped on the first electrical isolation layer, and a second electrical isolation layer and a polyurethane protective layer are sequentially arranged outside the shielded wire core layer, wherein the cable core includes: stranded conductive cable wires, a plurality of insulated cable wires, first aramid fibers, and cotton yarn.

[0006] The conductive cable wire includes: a conductive cable core, an insulating layer is wrapped outside the conductive cable core, a shielding layer is wrapped outside the insulating layer, and a sheath is wrapped outside the shielding layer.

[0007] The conductive cable core includes: stranded multi-strand fine copper wires and second aramid fibers.

[0008] The diameter of the multi-strand fine copper wires is 0.05 mm.

[0009] The insulating layer is an insulating layer extruded from polytetrafluoro thermoplastic material.

[0010] The shielding layer includes: braided wires woven together at intervals and crosswise, and the braided wires are braided wires composed of multi-strand first tinned round copper wires and first gold-coated wires, and the gold-coated wires are formed by rolling flat and annealing micro hard copper wires and winding them around fiber wires.

[0011] The sheath is a low-temperature-resistant polyvinyl chloride sheath.

[0012] The shielded wire core layer includes: multi-strand second tinned round copper wires and combined braided wires woven.

[0013] The combined braided wire is a composite of copper wire and a second gold skin wire formed by braiding. The second gold skin wire is a combined braided wire made by flattening and annealing micro hard copper wire and then wrapping it around a fiber wire.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The present utility model provides a bend-resistant and lightweight microphone shielded cable. Since a multi-strand fine tinned round copper wire and a gold skin wire formed by flattening and annealing micro hard copper wire and then wrapping it around a fiber wire are used outside the cable core, and a combined braided wire is used as a shielding layer, it can increase the electrical insulation performance and bending performance of the cable, and can also prevent the shielding net or the insulated wire core from being damaged when the cable sheath is peeled off to form the cable core. While meeting the conduction function of the cable, it can be more bend-resistant and extend the service life. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the bend-resistant and lightweight microphone shielded cable of the present utility model;

[0017] Figure 2 is a cross-sectional view of the bend-resistant and lightweight microphone shielded cable of the present utility model.

[0018] In the figure, 1 - conductive cable wire; 2 - insulated cable wire; 3 - first aramid fiber; 4 - cotton yarn; 5 - first electrical isolation layer; 6 - shielded wire core layer; 7 - second electrical isolation layer; 1.1 - fine copper wire; 1.2 - second aramid fiber; 1.3 - conductive cable core; 1.4 - insulation layer; 1.5 - first tinned round copper wire; 1.6 - braided wire; 1.7 - shielding layer; 1.8 - sheath; 6.1 - second tinned round copper wire; 6.2 - composite. Detailed Embodiments

[0019] The following will describe the present utility model in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] As Figure 1 shown, the present utility model provides a bend-resistant and lightweight microphone shielded cable, including: a cable core, on which a first electrical isolation layer 5 is wrapped, on which a shielded wire core layer 6 is wrapped, and a second electrical isolation layer 7 and a polyurethane sheath 8 are sequentially arranged outside the shielded wire core layer 6. Among them, the cable core includes: stranded conductive cable wires 1, 4 insulated cable wires 2, a first aramid fiber 3, and cotton yarn 4.

[0021] It should be noted that in the present utility model, the conductor structures of the conductive cable 1 and the insulated cable 2 are the same. The conductive cable 1 includes a conductor structure extruded with a sheath, and the specific structure is as follows Figure 2 , the conductive cable core 1.3 includes: multiple strands of fine copper wires 1.1 and second aramid filaments 1.2 stranded together. The conductive cable core 1.3 includes: multiple strands of fine copper wires 1.1 and second aramid filaments 1.2 stranded together. Exemplarily, the diameter of the multiple strands of fine copper wires is 0.05 mm, and the insulating layer 1.4 is an insulating layer extruded from a polytetrafluoro thermoplastic material.

[0022] Furthermore, in the present utility model, the shielding layer 1.7 includes: 4 groups of braided wires 1.6 woven together at intervals and crosswise. The braided wire 1.6 is a braided wire composed of multiple strands of first tinned round copper wires 1.5 and first gold-coated wires. The gold-coated wire is formed by rolling and annealing a micro hard copper wire and wrapping it around a fiber wire. The sheath 1.8 is a low-temperature resistant polyvinyl chloride sheath.

[0023] In addition, in the present utility model, the shielded wire core layer 6 includes: multiple strands of second tinned round copper wires 6.1 and combined braided wires 6.2 formed by weaving into a total braided wire. The combined braided wire 6.2 is a composite of copper wires and second gold-coated wires woven to form a combined braided wire. The second gold-coated wire is a combined braided wire made by rolling and annealing a micro hard copper wire and wrapping it around a fiber wire. Exemplarily, 4 wires in a group are woven into a total shielding layer with a density of not less than 90% in one layer. The total shielding layer is a combined braided layer woven by the total braided wire 6.2. The total braided wire is composed of multiple strands of second tinned round copper wires 6.1 and second gold-coated wires. The second gold-coated wire is a combined braided wire made by rolling and annealing a micro hard copper wire and wrapping it around a fiber wire. Specifically, 12 ingots of copper wires are used, and the composites of 4 ingots of copper wires and gold-coated wires are evenly spaced and woven to form the shielding layer. The method of using the shielding for a single insulated wire core is basically the same as that for the total shielding, but the single wire diameter of the copper wires is different. The single wire is thin (0.05 - 0.08) mm, and that of the total shielding is 0.10 mm.

[0024] The embodiments of the present utility model are described as follows Figure 2 In this cross-sectional view, the bend-resistant lightweight microphone shielded cable is composed of 1 single-core conductive cable 1 and 4 insulated cables 2. After stranding, a cable core is formed by using a first electrical isolation layer 5 with excellent electrical insulation performance. Then, a shielding layer is formed by weaving a tinned round copper wire 6.1 with good electrical conductivity and anti-interference performance and combined braided wires 6.2 around the cable core to form a shielded wire core layer 6. The outside of the shielding layer is covered with an electrical isolation paper 7 with excellent electrical insulation performance. Then, a new type of polyurethane 8 that is environmentally friendly, flame-retardant, highly elastic, low-temperature resistant, wear-resistant, radiation-resistant, oil-resistant, ozone-resistant, and corrosion-resistant is extruded to form a cable with a nominal thickness of 0.60 mm and a diameter of (4.4 - 4.6) mm.

[0025] Among them, the single-core conductive cable 1: consists of multiple fine copper wires of 0.05 mm 1.1 and the second aramid fiber with excellent tensile strength and a small denier of 160 denier 1.2 combined at a certain pitch to form a conductive wire core 1.3. A high-temperature resistant polytetrafluoro thermoplastic material with heat and cold resistance (-180°C to 260°C), acid and alkali resistance, and insoluble in various solvents is used to extrude an insulating layer, forming the insulating layer 1.4. The braided wire 1.6 is composed of 12 groups in total of multiple fine first tinned round copper wires 1.5 combined with a gold-plated wire formed by winding flattened and annealed micro hard copper wires around fiber filaments. A shielding layer for signal transmission is formed by cross-weaving 4 groups at intervals to form a shielding layer 1.7, shielding external interference. A light and flexible low-temperature resistant sheath 1.8 is used to extrude an extremely thin middle sheath to form a single-core cable 1, achieving an ideal high-strength, bend-resistant, micro flame-retardant signal cable.

[0026] Figure 2 The conductive cable 1 in the middle is composed of a tinned round copper wire with a tin coating thickness of 3 - 5 μm and a diameter of 0.005, which is made of multiple strands of tinned round copper wire with antioxidant and easy welding properties, wound around a single strand of 160 denier aramid fiber to form a conductive wire core 1.3, making the conductive wire core have particularly excellent electrical performance and weldability. On the conductive wire core 1.3, a polytetrafluoroethylene insulating material with high and low temperature resistance, excellent electrical performance, cold resistance of -180°C, and heat resistance of 260°C, which is tightly extruded into a round and regular shape with a standard thickness of 0.25 mm, is used to extrude an insulating layer to form an insulating layer 1.4 with a diameter of 0.70 mm, making the cable have higher weather resistance. Outside the insulated core wire, a combined braided wire 1.6 composed of 12 groups of 48 first tinned round copper wires 1.5 with a diameter of 0.08 and a braided wire made by winding flattened and annealed micro hard copper wires around fiber filaments is used to form 4 groups of combined braided wires and an evenly spaced woven shielding layer to form a shielding layer 1.7 for signal transmission. Outside the shielding layer, a soft polyvinyl chloride sheath material 1.8 with a resistance to -40°C is extruded to reduce internal electromagnetic interference and crosstalk in the signal wire. 4 insulated cables 2 and the single-conductive cable 1 are cabled. An extremely thin electrical isolation paper 5.1 is wound around the cabled core to form a first electrical isolation layer 5, increasing the bend resistance of the cable to form a wound cable core. Then, a total braided wire 6.2 composed of 60 second tinned round copper wires 6.1 with a diameter of 0.08 mm and a gold-plated wire made by winding flattened and annealed micro hard copper wires around fiber filaments is used to form 4 braided shielding layers with a density of not less than 90% to form a shielding wire core layer 6, making the anti-interference performance of the cable more excellent. After shielding, an electrical isolation paper 7.1 with a thickness of 0.06 mm is wound to enhance the bend resistance of the cable to form a cable core 7. Finally, an environmentally friendly, flame-retardant, highly elastic, low-temperature resistant, wear-resistant, radiation-resistant, oil-resistant, ozone-resistant, and corrosion-resistant small-density new polyurethane sheath 8 is extruded to improve the weather resistance of the cable and reduce the self-weight of the cable, meeting the cable weight requirements.

[0027] For those skilled in the art, it is obvious that the above specific factual examples are only the preferred solutions of the present utility model. Therefore, the improvements and changes that those skilled in the art may make to some parts of the present utility model still embody the principle of the present utility model and achieve the purpose of the present utility model, and all fall within the scope protected by the present utility model.

Claims

1. A bend-resistant lightweight microphone shielded cable, characterized in that, Comprising: A cable core, on which a first electrical isolation layer (5) is wrapped, on which a shielded wire core layer (6) is wrapped, and a second electrical isolation layer (7) and a polyurethane sheath (8) are sequentially arranged outside the shielded wire core layer (6), wherein the cable core comprises: stranded conductive cables (1), 4 insulated cables (2), first aramid filaments (3), and cotton yarns (4).

2. The bend-resistant lightweight microphone shielded cable according to claim 1, characterized in that, The conductive cable (1) comprises: a conductive cable core (1.3), an insulating layer (1.4) is wrapped outside the conductive cable core (1.3), a shielding layer (1.7) is wrapped outside the insulating layer (1.4), and a sheath (1.8) is wrapped outside the shielding layer (1.7).

3. The bend-resistant lightweight microphone shielded cable according to claim 2, characterized in that, The conductive cable core (1.3) comprises: stranded multi-strand fine copper wires (1.1) and second aramid filaments (1.2).

4. The bend-resistant lightweight microphone shielded cable according to claim 3, wherein The diameter of the multi-strand fine copper wires is 0.05 mm.

5. The bend-resistant lightweight microphone shielded cable according to claim 3 or 4, characterized in that, The insulating layer (1.4) is an insulating layer extruded from a polytetrafluoro thermoplastic material.

6. The bend-resistant lightweight microphone shielded cable according to claim 3 or 4, characterized in that, The shielding layer (1.7) comprises: 4 groups of braided wires (1.6) that are spaced and cross-braided together, and the braided wires (1.6) are braided wires synthesized from multi-strand first tinned round copper wires (1.5) and first gold-coated wires, and the gold-coated wires are formed by rolling and annealing miniature hard copper wires and then wrapping them around fiber filaments.

7. The bend-resistant lightweight microphone shielded cable according to claim 2, characterized in that, The sheath (1.8) is a low-temperature resistant polyvinyl chloride sheath.

8. The bend-resistant lightweight microphone shielded cable according to claim 1, characterized in that, The shielded wire core layer (6) comprises: multi-strand second tinned round copper wires (6.1) and combined braided wires (6.2) are braided.

9. The bend-resistant lightweight microphone shielded cable according to claim 8, wherein, The combined braided wires (6.2) are combined braided wires formed after braiding a composite of copper wires and second gold-coated wires, and the second gold-coated wires are combined braided wires made by rolling and annealing miniature hard copper wires and then wrapping them around fiber filaments.

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