Audio cable

Abstract

The invention provides an audio cable which comprises an insulating tube which is a hollow tube body and in which a wire hole is formed; the first conductor is sleeved with the wire hole, the first conductor is a single flat conductor and can reduce the skin effect, a gap is formed between the side wall of the first conductor and the inner wall of the wire hole, and air insulation is formed. The audio cable is small in capacitance and skin effect, high in signal transmission stability, good in use effect and low in manufacturing cost, and high-fidelity transmission is achieved.

Description

Technical Field

[0001] The invention relates to an audio device, in particular to an audio cable. Background Art

[0002] Audio cable is an important component in the audio system, and its quality directly determines the overall sound quality of the audio system. In the existing technology, mid-to-high-end high-fidelity audio cables improve the sound quality by using high-purity wire materials, and their manufacturing and purchasing costs are relatively high. Usually, the price of an audio cable ranges from 2,000 to 6,000. A set of audio systems uses several audio cables, which is very costly. At the same time, the existing audio cables have a large diameter, 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 issues to be solved The technical problem to be solved by the present invention is to provide an audio cable with compact structure, low manufacturing cost, low electrical transmission noise and good use effect. Technical solutions to the problem The present invention provides an audio cable, comprising: An insulating tube, wherein the insulating tube is a hollow tube body and a wire hole is formed inside the insulating tube; The first conductor 1 is sleeved in the wire hole. The first conductor 1 is a single flat conductor and can reduce the skin effect. There is a gap between its side wall and the inner wall of the wire hole to form air insulation.

[0004] Furthermore, the width of the first conductor 1 is smaller than the inner diameter of the wire hole and can increase the air insulation between the first conductor 1 and the wire hole.

[0005] Furthermore, the first conductor 1 is spiral-shaped, and can improve the overall bendability and reduce the contact area between the first conductor 1 and the inner wall of the insulating tube.

[0006] Furthermore, the insulating tube includes an inner insulating tube 2 and an outer insulating tube 3 arranged outside the inner insulating tube 2 .

[0007] Furthermore, the inner insulating tube 2 is made of Teflon, and the outer insulating tube 3 is made of other plastics.

[0008] Furthermore, the air volume in the wire hole accounts for ≥50%.

[0009] Furthermore, a shielding layer is provided outside the insulating tube, and the shielding layer includes multiple wire bodies 4 that are individually insulated and cross-woven or spirally wound outside the insulating tube. The ends of the multiple wire bodies 4 are combined to form a terminal. The wire bodies 4 can offset the skin effect caused by the passage of current.

[0010] Furthermore, the shielding layer includes a first shielded wire and a second shielded wire, the first shielded wire includes a plurality of individually insulated first wire bodies 41, the second shielded 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 the two ends of the second wire body 42 are respectively combined to form a second terminal.

[0011] Furthermore, the first wire body 41 and the second wire body 42 have opposite rotation directions, and a mark for distinguishing between the first wire body and the second wire body is provided on the first wire body and the second wire body.

[0012] Furthermore, the first conductor is grounded, and the first wire body 41 and the second wire body 42 are used to connect the positive and negative electrodes respectively.

[0013] Beneficial Effects The audio cable of the present invention adopts a flat single conductor structure, which can reduce the skin effect, reduce transmission attenuation, and improve signal fidelity. At the same time, a gap is generated between the side wall and the inner wall of the insulating tube to form air insulation and strong anti-interference ability. The conductor adopts a spiral structure, which can improve the bending ability, high strength, reduce the bending radius, reduce the packaging space, reduce the transportation cost, and is easy to install and has a wide range of applications. The conductor width is smaller than the hole diameter, and the spiral structure is used to achieve point contact between the conductor and the insulating tube, which greatly reduces the contact area, improves the insulation effect, has strong anti-interference ability, and has a good transmission effect. The shielding layer structure of separate insulation is adopted to greatly reduce the distributed capacitance, has good transmission performance, and has low attenuation. The center grounding and shielding connection of positive and negative electrodes are adopted to further reduce the capacitance and skin effect, and at the same time, 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 has low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the audio cable of the present invention; Figure 2 for Figure 1 The middle A part is enlarged and lifted; Figure 3 is a transverse cross-sectional view of the audio cable of the present invention; Figure 4 is a longitudinal cross-sectional view of the audio cable of the present invention; In the figure: 1, first conductor, 2, inner insulating tube, 3, outer insulating tube, 4, wire body, 41, first wire body, 42, second wire body. DETAILED DESCRIPTION

[0015] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] See also Figure 1-Figure 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. A wire hole is formed in the insulating tube for passing (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 arranged outside the inner insulating tube 2. The inner insulating tube 2 is made of Teflon, which has good insulation properties. 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 between the two is reliable and high in strength.

[0017] The first conductor 1 is sleeved (through) in the wire hole. The first conductor 1 is a single flat conductor. The flat conductor can reduce the skin effect. The skin effect refers to that when alternating current passes through the conductor, the current is mainly distributed on the surface of the conductor, rather than uniformly distributed in the entire cross-sectional area of ​​the conductor. This phenomenon is particularly obvious in high-frequency alternating current, because when high-frequency current is conducted in the conductor, it will gather on the surface of the conductor, resulting in almost no current passing through the center of the conductor. The wire with skin effect has high noise and high distortion when transmitting electrical signals. The flat conductor used in this application can effectively reduce the skin effect. When 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 in the entire cross-sectional area of ​​the conductor. Therefore, when transmitting electrical signals, the authenticity of the current can be guaranteed with high fidelity; at the same time, a flat conductor is used, and 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 arrangement, not only the skin effect is reduced, but also the insulation between the first conductor 1 and the insulating tube is improved.

[0018] 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 wire hole 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; in this application, the first conductor 1 is spiral, which can reduce internal stress, improve overall bendability, produce a certain degree of flexibility, reduce the bending radius, and achieve bending of different angles and degrees, which is convenient for installation and use, has a wide range of applications, 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 is spiraled around its own midline, and at the same time, spirals around parallel lines eccentric to its midline, see Figure 4 , forming point contact, which can minimize the contact area between the first conductor 1 and the inner wall of the insulating tube, and make the contact points of the two be arranged at equal angles along the length (axis) direction, thereby improving the connection reliability between the two and preventing the first conductor 1 from loosening freely.

[0019] In this embodiment, the amount of air (volume) in the wire hole accounts for ≥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%, which can improve the overall insulation, reduce external interference, and improve the transmission effect.

[0020] In the present application, a shielding layer is provided outside the insulating tube, and the shielding layer includes a plurality of individually insulated wire bodies 4, which are individually insulated and include a wire with a diameter of about 0.2mm-0.5mm, and an insulating layer provided outside the wire, the diameter of the insulating layer is about 0.6mm-1mm, and there is no conductivity between the two wire bodies. Each wire body 4 is a separate wire (including an external insulating layer), and the wire bodies 4 are cross-woven (warp and weft) or spirally wound outside the insulating tube, and the ends of the plurality of wire bodies 4 are merged to form a terminal for connecting the joint. The plurality of independent wire bodies 4 provided outside the insulating tube can offset the skin effect caused by the passage of current, thereby further improving the transmission performance.

[0021] In this embodiment, the shielding layer includes a first shielded wire and a second shielded wire, the first shielded wire includes a plurality of separately insulated first wire bodies 41, the second shielded wire includes a plurality of separately insulated second wire bodies 42, the two ends of the first wire body 41 are respectively merged to form a first terminal, a first wire is formed between the two first terminals, the two ends of the second wire body 42 are respectively merged to form a second terminal, a second wire is formed between the two second terminals; and the first wire body 41 and the second wire body 42 have opposite rotation directions and are arranged outside the insulating tube in a cross-woven form. In this embodiment, the number of the first shielded wire and the second shielded wire is 18-24, and the number of the first wire 41 is 6-12; in order to facilitate fast and accurate wiring, marks 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.

[0022] In the present application, the shielding density of the shielding layer (including the first shielded wire and the second shielded wire) outside the insulating tube is more than 70%. Since the shielding layer adopts a separately insulated wire structure, a large flow area is formed, which greatly reduces the distributed capacitance, reduces the attenuation and phase change during signal transmission, and improves the line transmission performance.

[0023] In this embodiment, the first conductor 1 is grounded, and the first wire body 41 and the second wire body 42 are connected to the positive and negative electrodes respectively. Through this arrangement, the capacitance can be reduced, the attenuation can be reduced, and the transmission distance can be extended. At the same time, the skin effect can be reduced and the transmission fidelity can be improved.

[0024] The audio cable structure adopting the above structure has a cost of about 1 / 4-1 / 3 of the cost of existing cables under the same sound quality conditions. It is small under the premise of ensuring the same sound quality, greatly reduces the manufacturing cost, increases the number of potential customers in the market, and has a good market prospect.

[0025] The audio cable of the present invention adopts a flat single conductor structure, which can reduce the skin effect, reduce transmission attenuation, and improve signal fidelity. At the same time, a gap is generated between the side wall and the inner wall of the insulating tube to form air insulation and strong anti-interference ability. The conductor adopts a spiral structure, which can improve the bending ability, high strength, reduce the bending radius, reduce the packaging space, reduce the transportation cost, and is easy to install and has a wide range of applications. The conductor width is smaller than the hole diameter, and the spiral structure is used to achieve point contact between the conductor and the insulating tube, which greatly reduces the contact area, improves the insulation effect, has strong anti-interference ability, and has a good transmission effect. The shielding layer structure of separate insulation is adopted to greatly reduce the distributed capacitance, has good transmission performance, and has low attenuation. The center grounding and shielding connection of positive and negative electrodes are adopted to further reduce the capacitance and skin effect, and at the same time, 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 has low manufacturing cost.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An audio cable, characterized in that: include: An insulating tube, wherein the insulating tube is a hollow tube and a wire hole is formed in the insulating tube; The first conductor is sleeved in the wire hole. The first conductor is a single flat conductor and can reduce the skin effect. A gap is provided between the side wall of the first conductor and the inner wall of the wire hole to form air insulation.

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

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

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

5. The audio cable according to claim 4, wherein: 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 air volume in the wire hole accounts for ≥50%.

7. The audio cable according to claim 1, wherein: A shielding layer is provided outside the insulating tube, and the shielding layer includes multiple individually insulated wire bodies that are cross-woven or spirally wound outside the insulating tube. The ends of the multiple wire bodies are combined to form a terminal. The wire body can offset the skin effect caused by the passage of current.

8. The audio cable according to claim 7, wherein: The shielding layer includes a first shielded wire and a second shielded wire, the first shielded wire includes a plurality of individually insulated first wire bodies, the second shielded wire includes a plurality of individually insulated second wire bodies, the two ends of the first wire body are respectively combined to form a first terminal, and the two ends of the second wire body are respectively combined to form a second terminal.

9. The audio cable according to claim 8, wherein: The first wire body and the second wire body have opposite rotation directions, and markings for distinguishing between the first wire body and the second wire body are provided on the first wire body and the second wire body.

10. The audio cable according to claim 8, wherein: The first conductor is grounded, and the first wire body and the second wire body are used for connecting positive and negative electrodes respectively.

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