An audio cable

Abstract

The present invention provides an audio cable, comprising: an insulating tube, which is a hollow tube body and has a wire hole formed therein; a first conductor, sleeved in the wire hole, the first conductor being a single flat conductor capable of reducing the skin effect, and having a gap between its side wall and the inner wall of the wire hole to form air insulation. The audio cable of the present invention has small capacitance and skin effect, high signal transmission stability, realizes high-fidelity transmission, has good use effect and low manufacturing cost.

Description

Technical Field

[0001] The present invention relates to a sound equipment, in particular to an audio cable. Background Art

[0002] An audio cable is an important part of an audio system, and its quality directly determines the overall sound quality of the audio. In the prior art, mid- to high-end high-fidelity audio cables improve the sound quality by using high-purity wire materials, but their manufacturing cost and purchase cost are relatively high. Usually, the price of an audio cable ranges from 2,000 to 6,000. Several audio cables are used in a set of audio systems, resulting in high costs. At the same time, the existing audio cables have a large diameter size, high hardness, a large bending radius, a large packaging and transportation volume, and are inconvenient or even impossible to install in some scenarios. Summary of the Invention

[0003] Technical Problems to be Solved

[0004] The technical problem to be solved by the present invention is to provide an audio cable with a compact structure, low manufacturing cost, low electrical transmission noise, and good use effect.

[0005] Technical Solutions for Solving the Problems

[0006] The present invention provides an audio cable, which includes:

[0007] An insulating tube, which is a hollow tube body and has a wire hole formed therein;

[0008] A first conductor 1, sleeved in the wire hole. The first conductor 1 is a single flat conductor that can reduce the skin effect, and there is a gap between its side wall and the inner wall of the wire hole to form air insulation.

[0009] Further, the width of the first conductor 1 is less than the inner diameter of the wire hole, which can increase the air insulation between the first conductor 1 and the wire hole.

[0010] Further, the first conductor 1 is spiral, which can improve the overall bendability and reduce the contact area between the first conductor 1 and the inner wall of the insulating tube.

[0011] Further, the insulating tube includes an inner insulating tube 2 and an outer insulating tube 3 arranged outside the inner insulating tube 2.

[0012] Further, the inner insulating tube 2 is made of Teflon, and the outer insulating tube 3 is made of other plastics.

[0013] Further, the proportion of the air volume in the wire hole is ≥50%.

[0014] Further, a shielding layer is provided outside the insulating tube. The shielding layer includes a plurality of individually insulated wire bodies 4 that are cross-woven or helically wound around the insulating tube. The ends of the plurality of wire bodies 4 are combined to form a connection terminal, and the wire bodies 4 can cancel the skin effect generated by the passage of current.

[0015] Further, the shielding layer includes a first shielding wire and a second shielding wire. The first shielding wire includes a plurality of individually insulated first wire bodies 41, and the second shielding wire includes a plurality of individually insulated second wire bodies 42. The two ends of the first wire body 41 are respectively combined to form a first connection terminal, and the two ends of the second wire body 42 are respectively combined to form a second connection terminal.

[0016] Further, the first wire body 41 and the second wire body 42 have opposite helix directions, and identification marks are provided on the first wire body and the second wire body for distinction.

[0017] Further, the first conductor is grounded, and the first wire body 41 and the second wire body 42 are respectively used to connect the positive and negative poles.

[0018] Beneficial effects

[0019] The audio cable of the present invention adopts a flat single-conductor structure, which can reduce the skin effect, lower the transmission attenuation, and improve the signal fidelity. At the same time, a gap is formed between its side wall and the inner wall of the insulating tube to form air insulation, with strong anti-interference ability; the conductor adopts a spiral structure, which can improve the bending ability, has high strength, can reduce the bending radius, lower the packaging space, reduce the transportation cost, and is convenient for installation, with a wide range of applications; the width of the conductor is smaller than the diameter of the hole body. Combined with the spiral structure, point contact between the conductor and the insulating tube is achieved, greatly reducing the contact area, improving the insulation effect, with strong anti-interference ability and good transmission effect; adopting an individually insulated shielding layer structure, greatly reducing the distributed capacitance, with good transmission performance and low attenuation; adopting central grounding and shielding to connect the positive and negative poles can further reduce the capacitance and skin effect. At the same time, it can extend the transmission distance; the audio cable of the present invention has small capacitance and skin effect, high signal transmission stability, realizes high-fidelity transmission, has good use effect, and low manufacturing cost. Description of the drawings

[0020] Figure 1 is a schematic structural diagram of the audio cable of the present invention;

[0021] Figure 2 is Figure 1 the enlarged view of part A in

[0022] Figure 3 is a transverse cross-sectional view of the audio cable of the present invention;

[0023] Figure 4 is a longitudinal cross-sectional view of the audio cable of the present invention;

[0024] In the figure: 1 is the first conductor, 2 is the inner insulating tube, 3 is the outer insulating tube, 4 is the conductor body, 41 is the first conductor body, and 42 is the second conductor body. Specific implementation mode

[0025] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Refer to Figures 1-4 The present invention provides an audio cable, which includes an insulating tube and a first conductor 1. The insulating tube is made of an insulating material and has an insulating function. The insulating tube is a hollow tube body, and a wire hole is formed in the insulating tube for threading (accommodating) the first conductor 1. The wire hole is a round hole. In this embodiment, the insulating tube includes an inner insulating tube 2 and an outer insulating tube 3 disposed outside the inner insulating tube 2. Among them, the inner insulating tube 2 is made of Teflon, and Teflon has good insulation. The outer insulating tube 3 is made of other insulating plastics, and is made of PVC in this embodiment. In order to reduce production costs, the thickness of the inner insulating tube 2 is less than the thickness of the outer insulating tube 3, and the thickness of the outer insulating tube 3 is 3-6 times the thickness of the inner insulating tube 2. In order to improve the overall structural strength, the outer insulating tube 3 is directly injection-molded outside the inner insulating tube 2, and the connection reliability between the two is good and the strength is high.

[0027] The first conductor 1 is sleeved (threaded) in the wire hole. The first conductor 1 is a single flat conductor. This flat conductor can reduce the skin effect. The skin effect refers to when an alternating current passes through a conductor, the current is mainly distributed on the surface of the conductor rather than evenly distributed throughout the cross-sectional area of the conductor. This phenomenon is particularly obvious in high-frequency alternating currents. Because when high-frequency current conducts in a conductor, it will gather on the surface of the conductor, resulting in almost no current passing through the center of the conductor. Wires with the skin effect have higher noise and higher distortion when transmitting electrical signals. However, in this application, a flat conductor is used, which can effectively reduce the skin effect. When an alternating current passes through the conductor, the current can be evenly distributed on the surface and the entire cross-sectional area of the conductor, and will not gather on the surface, so that the current is evenly distributed throughout the cross-sectional area of the conductor. Therefore, when transmitting electrical signals, the authenticity of the current can be guaranteed and the fidelity is high; at the same time, by using a flat conductor, there is a gap between its side wall and the inner wall of the wire hole, thereby forming air insulation. Air is the best insulator. Through the above settings, not only the skin effect is reduced, but also the insulation between the first conductor 1 and the insulating tube is improved.

[0028] In this embodiment, the width of the first conductor 1 is smaller than the inner diameter of the wire hole, which increases the air insulation between the first conductor and the wire hole, reduces the contact area between the first conductor 1 and the inner wall of the wire hole, and further improves the insulation performance. In this application, the first conductor 1 is spiral, which can reduce the internal stress, improve the overall bendability, generate a certain flexibility, reduce the bending radius, enable bending at different angles and degrees, facilitate installation and use, have a wide application range, and can reduce the contact area between the side wall of the first conductor 1 and the inner wall of the insulating tube. In this application, the first conductor 1 spirals around its own center line and, at the same time, spirals around a parallel line eccentric to its center line. Refer to Figure 4 , forming point contacts, which can minimize the contact area between the first conductor 1 and the inner wall of the insulating tube, and make the contact points between the two arranged at equal angles along the length (axis) direction, improving the connection reliability between the two and preventing the first conductor 1 from loosening freely.

[0029] In this embodiment, the proportion of the air volume in the wire hole ≥ 50%, which can also be understood as the ratio of the air area to the cross-sectional area of the entire wire hole on the same radial cross-section. Preferably, it is about 80%, that is, the proportion of the first conductor 1 is about 20%. This can improve the overall insulation performance, reduce external interference, and improve the transmission effect.

[0030] In this application, a shielding layer is provided outside the insulating tube. The shielding layer includes multiple individually insulated wire bodies 4. Individually insulated, it includes wires with a diameter of about 0.2 mm - 0.5 mm, and an insulating layer provided outside the wires. The diameter of the insulating layer is about 0.6 mm - 1 mm. The two wire bodies are non-conductive to each other. Each wire body 4 is an individual wire (including the external insulating layer). The wire bodies 4 are cross-woven (warp and weft) or spirally wound outside the insulating tube, and the ends of the multiple wire bodies 4 are combined to form a connection terminal for connecting a joint. The multiple independent wire bodies 4 provided outside the insulating tube can offset the skin effect generated by the current passing through, and further improve the transmission performance.

[0031] In this embodiment, the shielding layer includes a first shielding wire and a second shielding wire. The first shielding wire includes a plurality of individually insulated first wire bodies 41, and the second shielding wire includes a plurality of individually insulated second wire bodies 42. The two ends of the first wire body 41 are respectively combined to form a first terminal, and a first wire is formed between the two first terminals. The two ends of the second wire body 42 are respectively combined to form a second terminal, and a second wire is formed between the two second terminals. Moreover, the winding directions of the first wire body 41 and the second wire body 42 are opposite, and they are arranged in a cross-woven form outside the insulating tube. In this embodiment, the number of the first shielding wire and the second shielding wire is 18 - 24, and the number of the first wires 41 is 6 - 12. In order to facilitate quick and accurate wiring, identifiers are provided on the first wire body 41 and the second wire body 42 for quickly distinguishing the first wire body 41 and the second wire body 42. Preferably, the first wire body 41 and the second wire body 42 are set in different colors, which can not only quickly distinguish the first wire body 41 and the second wire body 42, but also improve the overall aesthetics.

[0032] In this application, the shielding density of the shielding layer (including the first shielding wire and the second shielding wire) outside the insulating tube is more than 70%. Since the shielding layer adopts an individually insulated wire structure, the formed overcurrent area is large, greatly reducing the distributed capacitance, decreasing the attenuation and phase change during signal transmission, and improving the transmission performance of the wire body.

[0033] In this embodiment, the first conductor 1 is grounded, and the first wire body 41 and the second wire body 42 are respectively connected to the positive and negative electrodes. Through this setting, the capacitance can be reduced, the attenuation can be decreased, the transmission distance can be extended. At the same time, the skin effect can be reduced and the transmission fidelity can be improved.

[0034] For the audio wire structure adopting the above structure, under the condition of the same sound quality, the cost is about 1 / 4 - 1 / 3 of the cost of the existing wire. On the premise of ensuring the same sound quality, the manufacturing cost is greatly reduced, the number of potential customers in the market is increased, and the market prospect is good.

[0035] The audio cable of the present invention adopts a flat single-conductor structure, which can reduce the skin effect, lower the transmission attenuation, and improve the signal fidelity. At the same time, a gap is formed between its side wall and the inner wall of the insulating tube to form air insulation, and the anti-interference ability is strong; the conductor adopts a spiral structure, which can improve the bending ability, has high strength, can reduce the bending radius, reduce the packaging space, lower the transportation cost, and is convenient for installation, with a wide range of applications; the width of the conductor is smaller than the diameter of the hole body. Combining with the spiral structure, point contact between the conductor and the insulating tube is realized, greatly reducing the contact area, improving the insulation effect, having strong anti-interference ability, and good transmission effect; a separately insulated shielding layer structure is adopted, greatly reducing the distributed capacitance, having good transmission performance and low attenuation; by adopting central grounding and shielding connected to the positive and negative electrodes, the capacitance and skin effect can be further reduced, and at the same time, the transmission distance can be extended; the audio cable of the present invention has small capacitance and skin effect, high signal transmission stability, realizes high-fidelity transmission, has good use effect, and low manufacturing cost.

[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An audio cable, characterized in that, Comprising: An insulating tube, which is a hollow tube body and has a wire hole formed therein; A first conductor, sleeved in the wire hole, the first conductor being a single flat conductor capable of reducing the skin effect, and having a gap between its side wall and the inner wall of the wire hole to form air insulation; A shielding layer is provided outside the insulating tube, the shielding layer comprising a plurality of individually insulated wire bodies that are cross-woven or helically wound around the insulating tube, and the ends of the plurality of wire bodies are combined to form a connection terminal, and the wire bodies can offset the skin effect generated by the passage of current; The shielding density of the shielding layer outside the insulating tube is more than 70%; The shielding layer comprises a first shielding wire and a second shielding wire, the first shielding wire comprising a plurality of individually insulated first wire bodies, the second shielding wire comprising a plurality of individually insulated second wire bodies, the two ends of the first wire bodies are respectively combined to form a first connection terminal, and the two ends of the second wire bodies are respectively combined to form a second connection terminal; The winding directions of the first wire body and the second wire body are opposite; The first conductor is grounded, and the first wire body and the second wire body are respectively used to connect the positive and negative poles.

2. The audio cable according to claim 1, wherein: The width of the first conductor is smaller than the inner diameter of the wire hole and can increase the air insulation with the wire hole.

3. The audio cable according to claim 1, characterized in that: The first conductor is spiral-shaped and can improve the overall bendability and reduce the contact area between the first conductor and the inner wall of the insulating tube.

4. The audio cable according to claim 1, wherein: The insulating tube comprises an inner insulating tube and an outer insulating tube arranged outside the inner insulating tube.

5. The audio cable according to claim 4, characterized in that: The inner insulating tube is made of Teflon, and the outer insulating tube is made of other plastics.

6. The audio cable according to claim 1, wherein: The proportion of the air volume in the wire hole is ≥50%; 7. The audio cable according to claim 1, characterized in that: Identifying marks are provided on the first wire body and the second wire body for distinction.

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