Double-loop isolation equipotential shielding sound signal line

Abstract

The utility model discloses a double-loop isolation equipotential shielding sound signal line which comprises a wire core, an insulation isolation layer, an equipotential shielding layer and an insulation protection layer. An insulation isolation layer is arranged on the outer wall of the wire core, an equipotential shielding layer is arranged on the outer wall of the insulation isolation layer, and an insulation protection layer is arranged on the outer wall of the equipotential shielding layer; the input end equipotential shielding layer is connected with the wire core, and the output end equipotential shielding layer is vacant and is not connected with the wire core; according to the utility model, the cable core and the equipotential shielding layer are respectively used for signal current and alternating current loop current formed by signal line distribution capacitance coupling, two current loop paths which are mutually independent and do not influence each other are established, and meanwhile, the equipotential shielding layer shields and isolates an electric field which changes along with the change of input signal voltage outside the cable core. Non-linear distortion caused by the existence of signal line distributed capacitance during signal transmission of the signal line is effectively eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of signal lines, specifically a double-circuit isolation equipotential shielding audio signal line Background Art

[0002] In the audio system, the signal line is responsible for transmitting signals between various devices and is an important part of the audio system. Due to the inherent distributed capacitance of the signal line, the signal line will produce certain nonlinear distortion when transmitting signals due to the distributed capacitance of the signal line, which reduces the high-fidelity transmission quality of the signal.

[0003] The reason is that when the signal line transmits the signal, the voltage on the signal line will change with the change of the signal voltage, so that an electric field that changes with the input signal voltage is generated between the signal line and the signal line, and between the signal line and the ground line. Since the signal line has a certain inherent distributed capacitance, a certain induced current will be generated in the signal line. As a result, two different loops of AC current are formed in the same wire. One is the signal working loop current flowing through the load, and the other is the AC loop current formed by the coupling of the distributed capacitance of the signal line itself. The phase relationship of the current and voltage is the capacitance characteristic. The phase relationship and amplitude-frequency characteristics of the current and voltage of these two different loops in the same wire are different, and they interact and modulate with the internal resistance of the wire, the distributed inductance of the wire, and the responsible impedance, so that the phase, amplitude-frequency characteristics, etc. of the signal obtained on the load change, and a certain nonlinear distortion is generated, which reduces the high-fidelity transmission quality of the signal. It will also directly affect and reduce the playback quality of audio equipment, such as clarity, transient characteristics, spatial sense and other musical expressiveness, and there is no effective solution in the existing technology. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a dual-loop isolated equipotential shielded audio signal line, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a dual-loop isolated equipotential shielding audio signal line, comprising a wire core, an insulating isolation layer, an equipotential shielding layer, and an insulating protective layer; with the wire core as the axis, the insulating isolation layer is sequentially arranged on the outer wall of the wire core, the equipotential shielding layer is arranged on the outer wall of the insulating isolation layer, and the insulating protective layer is arranged on the outer wall of the equipotential shielding layer, so that the insulating isolation layer is arranged between the wire core and the equipotential shielding layer to insulate and isolate the wire core from the equipotential shielding layer, and the wire core and the insulating isolation layer are arranged to be wrapped inside the equipotential shielding layer.

[0006] The equipotential shielding layer at the input end is connected to the line core.

[0007] The equipotential shielding layer at the output end is vacant and not connected to the wire core.

[0008] The insulating isolation layer insulates and isolates the equipotential shielding layer from the wire core at the input end except for the part where the equipotential shielding layer is connected to the wire core.

[0009] The wire core is a working path for signal current transmission.

[0010] The equipotential shielding layer is an AC loop current path formed by the distributed capacitance coupling of the signal lines.

[0011] The wire core and the equipotential shielding layer are made of conductor materials with good conductivity.

[0012] The insulating isolation layer and the insulating protection layer are made of insulating materials.

[0013] 1. By adopting the above technical solution, the signal current can only form a signal current path through the core. Because only the equipotential shielding layer at the input end is connected to the core, and the equipotential shielding layer is insulated and isolated from the core by the insulating isolation layer except for the equipotential shielding layer at the input end and the equipotential shielding layer at the output end is vacant and not connected to the core, forming an open circuit state, the equipotential shielding layer cannot form a signal current path, so the signal current can only form a signal current path through the core.

[0014] 2. By adopting the above technical solution, the AC loop current formed by the signal line distributed capacitance coupling can only form a current path in the equipotential shielding layer, and there is no such current component in the wire core. When an AC signal is applied to the input end, an electric field that changes with the input signal voltage is generated between the signal lines and between the signal lines and the ground line. Due to the existence of the signal line distributed capacitance, an induced current is generated in the signal line, that is, the AC loop current formed by the signal line distributed capacitance coupling. Because the wire core and the insulating isolation layer are arranged to be wrapped inside the equipotential shielding layer, the equipotential shielding layer at the input end is connected to the wire core, and except for the parts where the equipotential shielding layer and the wire core are connected together, the equipotential shielding layer and the wire core are insulated and isolated by the insulating isolation layer. Therefore, this induced current can only be induced in the equipotential shielding layer. Because the equipotential shielding layer at the output end is empty and not connected to the wire core, this induced current, that is, the AC loop current formed by the coupling of the distributed capacitance of the signal line, can only form a current path in the equipotential shielding layer, and there is no such current component in the wire core, and it cannot interfere with the signal transmitted in the wire core.

[0015] 3. By adopting the above technical solution, the electric field that changes with the input signal voltage is shielded and isolated outside the wire core by the equipotential shielding layer, and cannot interfere with the signal transmitted in the wire core. Since the equipotential shielding layer at the input end is connected to the wire core, the signal voltage applied to the input end is also applied to the wire core and the equipotential shielding layer at the same time. Therefore, no matter how the input signal voltage changes, the voltages on the equipotential shielding layer and the wire core are always equal, change synchronously, and have no potential difference. There is no changing electric field between the equipotential shielding layer and the wire core. In addition, because the wire core and the insulating isolation layer are arranged to be wrapped inside the equipotential shielding layer, except for the equipotential shielding layer at the input end where the equipotential shielding layer is connected to the wire core, the insulating isolation layer insulates and isolates the equipotential shielding layer from the wire core, and the equipotential shielding layer at the output end is empty and not connected to the wire core. Therefore, when an AC signal is applied to the input end, an electric field that changes with the input signal voltage is generated between the signal lines and between the signal lines and the ground line. The electric field can only act on the equipotential shielding layer, that is, it is shielded and isolated outside the wire core by the equipotential shielding layer and cannot interfere with the signal transmitted in the wire core.

[0016] The utility model establishes two independent current loop paths that do not affect each other by using the wire core and the equipotential shielding layer as the signal current and the AC loop current formed by the coupling of the distributed capacitance of the signal line, that is, the wire core is the signal transmission working path, and the equipotential shielding layer is the AC loop current path formed by the coupling of the distributed capacitance of the signal line. At the same time, the electric field that changes with the input signal voltage is shielded and isolated outside the wire core by the equipotential shielding layer, which effectively eliminates the nonlinear distortion caused by the existence of the distributed capacitance of the signal line when the signal line transmits the signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0019] In the figure: 1. Wire core; 2. Insulation isolation layer; 3. Equipotential shielding layer; 4. Insulation protection layer. DETAILED DESCRIPTION

[0020] The following further illustrates the embodiments of the present invention in conjunction with the accompanying drawings, and clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Please refer to the attached Figure 1 , Figure 2The utility model is realized by the following technical scheme: a double-circuit isolated equipotential shielding audio signal line, comprising a wire core 1, an insulating isolation layer 2, an equipotential shielding layer 3, and an insulating protective layer 4; with the wire core 1 as the axis, the insulating isolation layer 2 is sequentially arranged on the outer wall of the wire core 1, the equipotential shielding layer 3 is arranged on the outer wall of the insulating isolation layer 2, and the insulating protective layer 4 is arranged on the outer wall of the equipotential shielding layer 3. The insulating isolation layer 2 is arranged between the wire core 1 and the equipotential shielding layer 3 to insulate and isolate the wire core 1 from the equipotential shielding layer 3, and the wire core 1 and the insulating isolation layer 2 are arranged to be wrapped inside the equipotential shielding layer 3.

[0022] The equipotential shielding layer 3 at the input end is connected to the line core 1 . Figure 2 As shown on the left side of the diagram.

[0023] The equipotential shielding layer 3 at the output end is vacant and not connected to the wire core 1 . Figure 2 As shown on the right side of the diagram.

[0024] The equipotential shielding layer 3 at the input end is insulated and isolated from the wire core 1 by the insulating isolation layer 2 except for the part where the equipotential shielding layer 3 is connected to the wire core 1 .

[0025] The wire core 1 is a working path for signal transmission.

[0026] The equipotential shielding layer 3 is an AC loop current path formed by the distributed capacitance coupling of the signal lines.

[0027] The wire core 1 and the equipotential shielding layer 3 are made of a conductive material with good conductivity, preferably copper or silver.

[0028] The insulating isolation layer 2 and the insulating protection layer 4 are made of insulating materials.

[0029] 1. By adopting the above technical solution, the signal current can only form a signal current path through the core 1. Because only the equipotential shielding layer 3 at the input end is connected to the core 1, and the other parts except the equipotential shielding layer 3 at the input end and the core 1 are connected together, the equipotential shielding layer 3 is insulated and isolated from the core 1 by the insulating isolation layer 2, and because the equipotential shielding layer 3 at the output end is vacant and not connected to the core 1, the equipotential shielding layer 3 cannot form a signal path, so the signal current can only form a signal current path through the core 1.

[0030] 2. By adopting the above technical solution, the AC loop current formed by the coupling of the distributed capacitance of the signal line can only form a current path in the equipotential shielding layer 3, and there is no such current component in the core 1. When an AC signal is applied to the input end, an electric field that changes with the input signal voltage is generated between the signal lines and between the signal lines and the ground line, and an induced current is generated in the signal line due to the existence of the distributed capacitance of the signal line, that is, the AC loop current formed by the coupling of the distributed capacitance of the signal line. Because the core 1 and the insulating isolation layer 2 are arranged to be wrapped inside the equipotential shielding layer 3, the equipotential shielding layer 3 at the input end is connected to the core 1, and the other parts except the equipotential shielding layer 3 at the input end where the equipotential shielding layer 3 is connected to the core 1 are insulated and isolated from the core 1 by the insulating isolation layer 2, and the equipotential shielding layer 3 at the output end is empty and not connected to the core 1, then this induced current: that is, the AC loop current formed by the distributed capacitance coupling of the signal line can only be induced in the equipotential shielding layer 3, and there is no such current component in the core 1, and it cannot interfere with the signal transmitted in the core 1.

[0031] 3. By adopting the above technical solution, the electric field that changes with the input signal voltage is shielded and isolated outside the core 1 by the equipotential shielding layer 3, and cannot interfere with the signal transmitted in the core 1. Since the equipotential shielding layer 3 at the input end is connected to the core 1, the signal voltage applied to the input end is also applied to the core 1 and the equipotential shielding layer 3 at the same time. Therefore, no matter how the input signal voltage changes, the voltages on the equipotential shielding layer 3 and the core 1 are always equal, change synchronously, and have no potential difference. There is no changing electric field between the equipotential shielding layer 3 and the core 1. In addition, because the core 1 and the insulating isolation layer 2 are arranged to be wrapped inside the equipotential shielding layer 3, except for the part where the equipotential shielding layer 3 at the input end is connected to the core 1, the equipotential shielding layer 3 is insulated and isolated from the core 1 by the insulating isolation layer 2, and the equipotential shielding layer 3 at the output end is vacant and not connected to the core 1. Therefore, when an AC signal is applied to the input end, an electric field that changes with the input signal voltage is generated between the signal lines and between the signal lines and the ground line. The electric field can only act on the equipotential shielding layer 3, that is, it is shielded and isolated outside the core 1 by the equipotential shielding layer 3 and cannot interfere with the signal transmitted in the core 1.

[0032] The utility model establishes two independent current loop paths that do not affect each other through the core 1 and the equipotential shielding layer 3, which are respectively the signal current and the AC loop current formed by the coupling of the distributed capacitance of the signal line. That is, the core 1 is the signal transmission working path, and the equipotential shielding layer 3 is the AC loop current path formed by the coupling of the distributed capacitance of the signal line. At the same time, the electric field that changes with the input signal voltage is shielded and isolated outside the core 1 by the equipotential shielding layer 3, which effectively eliminates the nonlinear distortion caused by the existence of the distributed capacitance of the signal line when the signal line transmits the signal.

[0033] In summary, the utility model sequentially arranges an insulating isolation layer 2 on the outer wall of the wire core 1, arranges an equipotential shielding layer 3 on the outer wall of the insulating isolation layer 2, and arranges an insulating protective layer 4 on the outer wall of the equipotential shielding layer 3; the equipotential shielding layer 3 at the input end is connected to the wire core 1, and the equipotential shielding layer 3 at the output end is vacant and not connected to the wire core 1. The wire core 1 and the equipotential shielding layer 3 are respectively the signal current and the AC loop current formed by the coupling of the distributed capacitance of the signal line, and two independent current loop paths that do not affect each other are established, that is, the wire core 1 is the signal transmission working path, and the equipotential shielding layer 3 is the AC loop current path formed by the coupling of the distributed capacitance of the signal line. At the same time, the equipotential shielding layer 3 shields and isolates the electric field that changes with the input signal voltage outside the wire core 1, effectively eliminating the nonlinear distortion caused by the existence of the distributed capacitance of the signal line when the signal line transmits the signal.

[0034] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any use of the technical scope disclosed by the utility model, equivalent replacement or change according to the technical solution and utility model concept of the utility model, or direct or indirect use in the technical field of other related products should be included in the protection scope of the utility model.

Claims

1. A double-circuit isolated equipotential shielded audio signal line, comprising a line core, characterized in that: It also includes an equipotential shielding layer, and an insulating isolation layer is provided between the wire core and the equipotential shielding layer; The equipotential shielding layer at the input end is connected to the line core, and the equipotential shielding layer at the output end is vacant and not connected to the line core.

2. According to claim 1, the double-loop isolated equipotential shielded audio signal line is characterized by: The wire core is a working path for signal transmission.

3. The double-loop isolated equipotential shielded audio signal line according to claim 1 is characterized in that: The equipotential shielding layer is an AC loop current path formed by the distributed capacitance coupling of the signal lines.

4. The double-loop isolated equipotential shielded audio signal line according to claim 1 is characterized in that: An insulating isolation layer is arranged between the wire core and the equipotential shielding layer, and the wire core and the insulating isolation layer are arranged and wrapped inside the equipotential shielding layer.

5. The double-loop isolated equipotential shielded audio signal line according to claim 1 is characterized in that: The insulating isolation layer insulates and isolates the equipotential shielding layer from the wire core at the input end except for the part where the equipotential shielding layer is connected to the wire core.

6. The double-loop isolated equipotential shielded audio signal line according to claim 1 is characterized in that: An insulating protective layer is arranged on the outer wall of the equipotential shielding layer.

7. The double-loop isolated equipotential shielded audio signal line according to claim 1 is characterized in that: The wire core and the equipotential shielding layer are made of conductive materials.

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