JPS6015219Y2 - low impedance stranded wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of low impedance stranded wires, particularly electric wires used as internal wiring materials for electronic devices such as computers and office automation equipment.

Recently, low impedance circuits have become widely used for the internal wiring of electronic devices such as computers and OA equipment.
The demand for low impedance is increasing.

In order to meet this demand, impedance has conventionally been reduced by using an insulating material with a high dielectric constant for the insulating layer used in electric wires, or by reducing the thickness of the insulating layer.

However, these methods do not have suitable materials that can be used and are not easy to manufacture.

The purpose of the present invention is to eliminate these problems and provide a low-impedance stranded wire that has fewer restrictions on the materials used and is easy to manufacture. In the stranded wire formed by twisting a plurality of insulated wire cores coated with , at least one of the plurality of insulated wire cores is made of a conductive plastic that can be removed simultaneously when the conductor and the insulator layers are peeled off. A low impedance stranded wire for internal wiring of an electronic device is characterized by having a conductive layer.

Examples of the present invention will be described below.

FIG. 1 shows an example of this, in which each conductor 1
, insulated wire cores 10 and 20 each consisting of a conductor layer 2 and an insulator layer 3 are twisted in pairs.

The conductive layer 2 used here is made of, for example, conductive vinyl, conductive polyethylene, conductive polyester, etc. These conductive plastics are coated, extruded, or wrapped with tape onto the conductor 1 to form the conductive layer 2. The insulator layer 3 is then formed by extruding the insulator or wrapping and sealing a heat-sealable laminate tape with high mechanical strength.

The insulated wire core thus formed is used, for example, as a low impedance stranded wire by being twisted in pairs.

In general, the characteristic impedance value of an insulated wire core consisting of a conductor and an insulating layer covering it is as follows: When the insulating material is the same and the thickness of the insulating layer is the same, the larger the conductor, the higher the impedance. becomes lower.

On the other hand, there are restrictions on the finished outer diameter from the wiring standpoint, and dimensions are often restricted from the terminal connection standpoint.

However, when using the structure of this invention, by providing a conductor layer on the conductor, the dimensions of the upper conductor appear thicker (
It is possible to lower the characteristic impedance, and it is also easy to handle because the conductor layer can be removed at the same time when the insulator layer is peeled off during terminal processing. .

In this example, all of the stranded wires are formed with an insulated wire core having a conductive layer, but depending on the required usage conditions and characteristics, some of the stranded wires may be made of a conductive layer. It may also be an insulated wire core having layers.

In addition, after twisting the required insulated wire cores, the insulated wire cores are heat-sealed to reduce the distance between the conductors, or as shown in Figure 2, the twisted insulated wire cores are 30.40°50. If the gaps (each gap) formed by the gaps are filled with an insulator 60, it is possible to further lower the characteristic impedance.

The characteristics of each insulated wire core 30, 40, 50 in FIG. 2 are the same as in FIG.

As described above, the low impedance stranded wire of the present invention makes it possible to provide a type of stranded wire that has few restrictions on the materials used and is easy to manufacture, and has great practical value.

[Brief explanation of drawings]

1 and 2 are cross-sectional views of different embodiments of the low impedance stranded wire of the present invention. 1...Conductor, 2...Conductor layer, 3...
...Insulator layer, 10, 20, 30, 40.50...
...Insulated wire core, 60...Insulator.

Claims (1)

[Scope of utility model registration request] In a stranded wire formed by twisting together a plurality of insulated wire cores formed by coating a conductor with an insulating layer, at least one of the plurality of insulated wire cores is simultaneously removed when the conductor and the insulating layer are peeled off. Low impedance stranded wire for internal wiring of electronic equipment, characterized in that it has a conductor layer made of a conductive plastic.