JPS6131444Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wrapping wire having a twin twist type or three twist type structure and having a low capacitance of 70 PF/m or less between wires.

The capacitance of the twin-twist or three-twist structure is determined by the distance between the lines and the dielectric constant of the insulator. In order to reduce the capacitance between lines, it depends on whether to use a material with a small dielectric constant or increase the thickness of an insulator that increases the distance between the lines. Even if you choose small materials, there are limits.

Therefore, for wires that require low capacitance or high contact impedance, the finished outer diameter of the wire is large due to the required characteristics, and when wrapping the end of the wire, there are restrictions on the size of the wrapping tool and wrapping post. processing may not be possible. Therefore, terminal processing using conventional soldering or caulking terminals had to be performed, leading to a problem of increased costs.

The object of the present invention is to provide a novel wrapping wire material that solves the above-mentioned conventional problems and enables wrapping connection, which is a cheaper terminal treatment.

In other words, the gist of this invention is to make the insulator a two-layer structure, with the inner layer set to an outer diameter that allows for wrapping connections, and the outer layer set to a thickness that provides the required capacitance. It is a wrapping wire rod with a structure of

FIG. 1 is a structural diagram of the present invention. Inner layer insulator 2
The outer insulating layer 3 is stripped in steps. Figure 2 shows a wrapping connection using the wire of the present invention. A part of the inner layer insulator 2 separated from the outer layer insulator 3 is modified by wrapping. More specifically, a 0.26φ single wire is used for the conductor 1, a fluorine resin with a small dielectric constant is used for the inner layer insulator 2 and the outer layer insulator 3, and the outer diameter of the inner layer insulator 2 is 0.6φ when the steps are removed. 0.94 at outer diameter on insulator 3
It is set to φ. This wire core is twisted and covered with a shield layer 4 and a sheath 5 as shown in the figure. The capacitance between these time lines is as small as approximately 50PF/mm.

Although this invention is designed as a wrapping wire, an example of its application is a structure where the required characteristics require a thicker insulation and a larger outer diameter, and where only the outer diameter of the terminal part is made thinner. For example, it can also be applied to the case of connecting to a partially small hole or groove, or a contact of a connector. As for the structure of the wire, it can be applied to a cable with only two twists or three twists, or to a multi-pair cable using these wires. The materials of the inner layer and the outer layer may be the same or different. For example, the inner layer may be made of a soft resin, and the outer layer may be made of easily peelable foamed polyethylene.

According to the present invention constructed in this manner, wrapping connection is possible for terminal processing, the reliability of the connection is increased, the connection speed is increased, and costs are reduced.

Furthermore, since the outer diameter can be made thinner if necessary, if the terminal section becomes crowded during wiring, the step-peel connection section can be cleared.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram showing an embodiment of the low capacitance wrapping wire of the present invention. FIG. 2 is a diagram showing an embodiment in which the wire of the present invention is used for wrapping connection. 1... Conductor, 2... Inner layer insulator, 3... Outer layer insulator, 4... Shield layer, 5... Sheath, 6...
lapping post.

Claims (1)

[Scope of utility model registration request] It consists of a conductor and a two-layer insulator that can be easily peeled off, and the inner layer insulator has an outer diameter that allows for wrapping, and the outer layer insulator has an outer diameter that allows the required characteristics to be obtained. A low capacitance type wrapping characterized in that the conductor and the two-layer insulator are separated in stages at the wire terminal portion, and the inner layer insulator is connected by wrapping. Wire rod for use.