CN2650300Y - A new structure of audio and video signal line - Google Patents

Abstract

The utility model relates to an audio and video signal connecting wire is arranged side by the solid conductor of different cross-sectional areas and is constituted, and each conductor is respectively insulating back cladding within the insulating layer separately, and wherein the quantity of different cross-sectional area conductors varies. The lead wire is of a conductor structure with a plurality of mutually insulated conductors with different cross sectional areas, particularly, the conductor with a smaller cross sectional area adopts copper foil wires or enameled wires or wire-covered wires, so that the outer diameter of the wire is reduced, the tensile strength of the wire is improved, the skin effect of the wire is reduced, and the high-frequency transmission is facilitated; the conductor with larger cross-sectional area is beneficial to low frequency to pass through quickly, so that the effects of high-frequency band and low-frequency band signal phase synchronization and good full-frequency balance can be achieved.

Description

A new structure of audio and video signal line

technical field

The utility model relates to a signal connection line applied to audio and video, in particular to a connection line which adopts a plurality of conductors with different cross-sectional areas to jointly transmit audio and video signals.

Background technique

It is a well-known fact that conductors are used to transmit signals in the wire and cable field, and conductors with different cross-sectional areas are selected according to the size of the transmitted current. In the general field of audio and video wires, there are three main considerations for determining the cross-sectional area of a conductor: the size of the current it conducts; the tensile strength it needs to withstand; and the required outer diameter. Generally, conductors with different diameters are selected based on the calculated cross-sectional area of the conductor and then comprehensively consider other factors.

There is a skin effect in the transmission process of the current in the wire, that is, when the current flows in the conductor, an electromagnetic field is generated around the wire at the same time; when the frequency increases, these electromagnetic fields make the electrons flow more and more to the surface of the conductor, making the center of the conductor relatively For electrons, it presents a "vacuum" state, and no electrons pass through the center of the conductor. For example, at a frequency of 1MHz, the skin depth is 0.19812mm (95% of the current is concentrated in the skin depth under the epidermis); for another example, at a frequency of 1GHz, the skin depth is 0.019812mm. In this way, the transmission of current is only limited to the surface layer of the conductor, and the conductor material and size beyond the skin depth have no effect on the signal. Therefore, for high-frequency signal transmission, it is more inclined to use a conductor with a smaller diameter, because there will be very little space for electrons to pass through the conductor with a smaller diameter, so that the utilization rate of the material is greatly improved.

The strength of silver-copper alloy wire is much better than that of pure copper wire, and its conductivity and strength are several times higher than that of ordinary copper wire. Silver-copper alloy wire is still the strongest, easiest to process and most practical superconductor wire material. Among audio and video wires, wires using silver-copper alloy have the characteristics of fast transmission speed, soft sound, and good transparency.

Silk-covered wire is formed by obliquely wrapping a synthetic fiber wire (such as nylon, etc.) on a single or twisted wire, and the nylon wire can play an insulating role. The use of silk-covered wire can not only reduce the outer diameter of the core wire and thus reduce the outer diameter of the entire wire; it can also enhance the tensile strength of the wire and increase the service life of the wire.

Enameled wire is made by coating one or more layers of insulating varnish film on the surface of a high-purity, high-conductivity conductor, and drying it. Since the thickness of the insulating varnish on the surface of the enameled wire can be made very thin, instead of using other insulators for insulation, the outer diameter of the insulation of the wire can be greatly reduced, especially when multi-strand enameled wires are required.

Copper foil wire is formed by winding a very narrow strip-shaped copper foil around several strands of nylon wire or cotton thread. Since the center of the copper foil wire is a fiber wire, the use of copper foil wire instead of a common conductor can enhance the tensile and bending resistance of the wire. The conductor of the copper foil wire is wound in multiple strands to increase the travel distance, increase the surface area, reduce the skin effect, and facilitate the transmission of high frequencies.

Contents of the invention

The purpose of this utility model is to provide a new structure of audio and video signal line, the technical problem to be solved is to allow signals of different frequency bands (such as high, medium and low frequency) to start and arrive at the same time, and to avoid phase difference as much as possible.

In order to achieve the above object, the utility model adopts the following technical scheme: the conductor part of the audio and video signal line of the utility model is composed of conductors with cross-sectional areas ranging from large to small, arranged side by side, wherein each conductor is respectively insulated, twisted and wrapped within the insulating layer.

The cross section of the solid conductor of the utility model is a solid circular and flat conductor.

The solid circular and flat conductors of the utility model are composed of a series of conductors with cross-sectional areas ranging from large to small.

The solid circular and flat conductors of the utility model are made of silver-copper alloy.

The conductor with smaller cross-sectional area in the audio-video signal line of the utility model is composed of more than two copper foil wires.

The conductor with smaller cross-sectional area in the audio-video signal line of the utility model is composed of more than two enameled wires.

The conductor with smaller cross-sectional area in the audio-video signal line of the utility model is composed of more than two silk-covered wires.

Compared with the prior art, the utility model adopts the above-mentioned multi-core audio-video cable, which is characterized in that the responses of high, medium and low frequencies are very balanced, neutral and have better clarity. Since audio and video cables are designed with multi-core wires, each core wire has a different thickness and is independently insulated. It is well known that thin core wires are good for transmitting high-frequency signals, and thick core wires are good for transmitting low-frequency signals. The insulation of the wires is for high, medium and low frequencies to go their own way without affecting each other. Thinner wires are used to improve the phase characteristics of high frequencies, resulting in higher fidelity and purer sound quality. This kind of audio and video cable with high, medium and low frequencies separated, and well water does not interfere with river water, can achieve unique audio and video effects.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of one of the specific embodiments of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the second embodiment of the utility model.

Fig. 3 is a schematic cross-sectional structure diagram of the third embodiment of the utility model.

Fig. 4 is a schematic diagram of the numbering of the core wires of the third embodiment of the present invention.

Fig. 5 is a cross-sectional schematic diagram of a fourth embodiment of the utility model.

Fig. 6 is a schematic cross-sectional structure diagram of the fifth embodiment of the utility model.

Fig. 7 is a schematic cross-sectional structure diagram of the sixth embodiment of the utility model.

Detailed ways

As shown in Figure 1, the copper foil wire 1 and its insulator 2 form the first core wire, the thinner solid conductor 3 and its insulator 4 form another core wire, and the thicker solid conductor 5 and its insulator 6 form the third core wire; the cross-section is a rectangular flat conductor 10 and its insulator 9 to form the fourth core wire; core wires composed of conductors with different cross-sectional areas of different sizes and numbers are combined and twisted to form a twisted wire. The twisted wire is added with a shielding layer 8 and then covered with an insulator 7 to form an audio and video signal connection wire in one of the specific embodiments of the present invention.

The copper foil wire in one of the above-mentioned specific embodiments of the utility model may also be an enameled wire or a wire covered wire.

As shown in Figure 2, it is the sectional structure schematic diagram of the utility model specific embodiment two, wherein 11 is a solid conductor (two in total), 12 is a multistrand enameled wire (two in total), 13 is an insulator, and 14 is a conductive PVC , is the shielding layer. Among them, the solid conductor and the multi-strand enameled wire are insulated from each other and twisted to form a twisted wire. The twisted wire is added with a shielding layer 15 and then covered with an insulator 16 to form the audio and video signal connection wire of the second embodiment of the present invention.

The enameled wire in the second embodiment of the above-mentioned utility model can also be a copper foil wire or a wire covered wire.

As shown in Fig. 3, it is a schematic cross-sectional structure diagram of the third embodiment of the utility model. Among them, 17 is a solid circular conductor (two in total), 18 is an insulator, 19 is a multi-strand fine copper stranded body (four in total), 20 is an insulator, 21 is a filler, 22 is a conductive PVC, and 23 is a shield layer, 24 is the total insulator of electric wire, and 25 is a nylon braid. Items 17 to 25 jointly constitute the audio-video signal connection line of the third embodiment of the utility model.

As shown in Figure 4, it is a schematic diagram of the numbering of the core wires of the third embodiment of the utility model. In the specific wiring, the core wires ①, ②, ③ are twisted together as a conductor after the insulator is stripped off, and the core wires ④, ⑤, ⑥ are stripped off the insulator and twisted together as a conductor.

As shown in Fig. 5, it is a schematic cross-sectional structure diagram of the fourth embodiment of the utility model. Wherein 29 is a combination of multi-strand fine copper strands and several copper foil wires, 30 is an insulator, 28 is conductive PVC, 27 is a shielding layer, and 26 is a general insulator of electric wires. 26～30 items jointly constitute the audio-video signal connection line of the fourth embodiment of the utility model.

As shown in Figure 6, it is a schematic cross-sectional structure diagram of the fifth embodiment of the utility model. Wherein 31 is a multi-strand fine copper stranded body (two in total), 32 is its insulator, and 33 is the total insulator of the electric wire. Items 31 to 33 jointly constitute the audio-video signal connection line of the fifth embodiment of the utility model.

As shown in Figure 7, the thinner solid conductor 34 and its insulator 35 form the first core wire (six in total), the thicker solid conductor 36 and its insulator 37 form the second core wire, and the multi-strand fine copper stranded conductor 38 It forms a third core wire with its insulator 39 ; core wires composed of conductors with different cross-sectional areas of different sizes and numbers are combined and twisted to form a stranded wire, and the stranded wire is covered with an insulator 40 . Then three such core wires are twisted and added with a shielding layer 41 to cover the total wire insulator 42 and the nylon braid 43 to form the sixth audio and video signal connection line of the utility model embodiment.

When the electric wire of the utility model is connected with the connector, according to specific wiring requirements, the above-mentioned conductors with different cross-sectional areas can be stripped of the insulator and twisted together to be used as a conductor.

For ordinary electric wires, the central conductor is a single conductor. If the conductor is too thin, the electrical impedance will increase; if the conductor is too thick, it will be difficult for high-frequency signals to pass through. Therefore, the utility model bundles many bundles of wires thinner than hair into one bundle, so that the transmission loss from low frequency to high frequency is reduced; but the cross-sectional area of thin conductors is small, and the signal "flow efficiency" in the middle and low frequency bands is higher in frequency difference; This is because the high-frequency signal travels faster on the metal surface and arrives first, while the low-frequency signal travels in the center of the conductor and arrives relatively late; using a conductor with a thicker wire diameter facilitates the passage of low frequencies quickly, so that high and low frequency bands can be reached The purpose of signal phase synchronization. Therefore, conductors of different thicknesses and insulation are used to transmit signals in different frequency bands, which can avoid the skin effect and meet the requirements of frequency comprehensiveness at the same time.

The above-mentioned conductor in the utility model refers to any material that can conduct electricity; the most commonly used ones are various metal wires, which can be made of any suitable metal material, such as solid copper or multi-strand copper wire, metal-coated substrate , silver, aluminum, steel or other metals, metal alloys or their different combinations; the conductor can also be other non-metal composite materials capable of conducting electricity.

The above-mentioned insulator in the present invention, also known as dielectric, refers to suitable materials for cable insulation, such as polyethylene, polyvinyl chloride, polypropylene, fluorine copolymer, cross-bonded polyethylene, rubber and other materials. Many insulating materials can contain more than one additive such as flame retardants, anti-fungal agents, etc.

Claims (7)

1. the audio-video signal line of a new structure, it is characterized in that: the conductor part of described audio-video signal line is to be arranged side by side by the descending conductor of cross-sectional area to constitute, and wherein each conductor insulation separately respectively, is coated within the insulating barrier after stranded.

2. the audio-video signal line of new structure according to claim 1, it is characterized in that: the cross section of described conductor is the conductor of solid circles and flat pattern.

3. the audio-video signal line of new structure according to claim 2 is characterized in that: the conductor of described solid circles and flat pattern is that the descending serial lead of cross-sectional area is formed.

4. the audio-video signal line of new structure according to claim 3, it is characterized in that: the conductive material of described solid circles and flat pattern is a yellow gold.

5. the audio-video signal line of new structure according to claim 1 is characterized in that: the conductor of small cross sectional is made up of the copper foil wire more than two in the described audio-video signal line.

6. the audio-video signal line of new structure according to claim 1 is characterized in that: the conductor of small cross sectional is made up of the enamelled wire more than two in the described audio-video signal line.

7. the audio-video signal line of new structure according to claim 1 is characterized in that: the conductor of small cross sectional is made up of the silk-covered wire more than two in the described audio-video signal line.

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