JPS6313607Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shielded wire, and more particularly to a shielded wire to which a pressure contact terminal can be attached accurately.

Shielded wire typically has a conductive or semiconductive shielding layer to provide electrostatic shielding, and the shielding layer may be made of, for example, braided wire, spiral wire, semiconductive plastic material,
Alternatively, it is made of metal tape or the like. 1st
Figures A and B show a single-core shielded wire having a braided shield 3a and a spiral shield 3b on the outer periphery of an insulated wire core consisting of a conductor 1 and an insulator 2, and a sheath 9 on the outermost layer. If a pressure contact terminal is applied to this type of shielded wire, a short circuit will occur between the shield conductors 3a, 3b and the conductor 1 via the terminal, making it impossible to obtain a desired electrical connection. A pressure contact terminal, as will be described later in the embodiment of the present invention shown in FIG.
Electrical connection of a plurality of insulated wire cores is realized at once by piercing a fork-shaped terminal from the outer periphery of an insulator of an electric wire having a plurality of insulated wire cores, for example, a ribbon wire.

However, for the shielded wire shown in Figure 1 and other conventional shielded wires, it is impossible to use pressure contact terminals for the reasons mentioned above, and in order to make this possible, Peeling and removing the shield layer is undesirable because workability deteriorates.

This invention was made in view of the above,
The present invention provides a shielded wire that allows a press-contact terminal to be attached accurately despite the presence of a shield layer, and is composed of at least one insulated wire core made of a conductor and an insulator, and the insulated wire core. a shielded wire core provided in parallel with the insulator and coated with a semiconductive material and having the same outer diameter as the insulator; It consists of a shield layer made of a semiconductive material connected to the shield layer, and a sheath provided around the outer periphery of the shield layer.

Further, according to a preferred embodiment of the present invention, a plurality of insulated wire cores and one shielded wire core are arranged in parallel with the same predetermined spacing, and a mold release agent is further applied around the outer periphery of each wire core. applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2A, 2B, and 2C.

FIG. 2A shows the state in which the shielded wire 10 and the pressure contact terminal 20 according to the present invention are applied. The shielded wire 10 includes four insulated wire cores 4 consisting of a conductor 1 and an insulator 2, a shielded conductor (drain wire) 5 having the same outer diameter as the conductor 1, and a semiconducting conductor (drain wire) 5 having the same outer diameter as the insulator 2. The wire core 7 has one shielded wire core 7 made of a transparent coating 6, and a mold release agent such as a lubricant is applied on the outer periphery of each wire core 4,7. The five wire cores 4 and 7 are arranged so that the distance between them is the same as that of a predetermined distance, and a shield layer 8 made of semiconductive plastic that commonly envelops all the wire cores 4 and 7 is extruded and coated on the outermost layer. A sheath 9 is provided by extrusion.

FIG. 2B shows a cross section of the shielded wire 10, in which a shielded wire core 7 consisting of a shielded conductor 5 and a semiconductive coating 6 is located at the center, and two insulated wires each consisting of a conductor 1 and an insulator 2 are located on both sides. A wire core 4 is located there. A shield layer 8 is provided to commonly enclose each of the five wire cores 4 and 7, and a sheath 9 is provided as the outermost layer. The shielding layer 8 made of the conductive plastic includes a surrounding portion 8a surrounding the entire outer periphery of the insulated wire core 4 and the shielded wire core 7, and the surrounding portion 8a.
It has a connecting part 8b that connects the comrades of a.

To explain the applied state of the pressure contact terminal 20 with reference to FIG. 2A, the sheath 9 and the shield layer 8 are cut with a cutting knife (not shown),
is slid to expose each wire core 4, 7 over the length necessary to apply the insulation displacement terminal 20. In this case, this work can be performed more easily if a mold release agent is applied on the outer periphery of each wire core 4, 7. The pressure contact terminal 20 has fork-shaped terminals 21 equal in number to the wire cores 4, 7, and has the same number of wire cores 4, 7.
They are housed in the housing 22 at intervals equal to a spacing d of 7. As shown in FIG. 2C, the fork-shaped terminal 21 has an expanding guide portion 21 at its tip in order to guide the conductor 1 and achieve a desired clamping state.
It has a. Therefore, by applying each wire core 4, 7 to the expansion guide portion 21a of each terminal 21 of the pressure contact terminal 20 and pushing down the lid member 23 from above, each terminal 21 is connected to the insulator 2 and shield of the insulated wire core 4. Pierce the semiconductive coating 6 of the wire core 7 and
As shown in Figure C, each terminal 21 and each conductor 1,
5 to achieve accurate and reliable electrical connections. In this pressure welding operation, the above-mentioned cutout portion 9a
may be completely removed from each core 4, 7, but if it is left at the end of each core 4, 7 as shown in FIG. In order to function as a spacer to maintain a predetermined distance d between each terminal 21 and each wire core 4, 7,
The positional relationship between the two can be made more accurate.

As explained above, according to the shielded wire according to the present invention, the insulated wire core conductor and the shield conductor have the same outer diameter, and the shield conductor is covered with a semiconductive material having the same outer diameter as the insulated wire core. Because there are
An extruded shield layer can be provided on the outer periphery of each wire core with a predetermined spacing accurately, and if a mold release agent is applied on the outer periphery of each wire core, the shield layer and sheath can be removed. can be carried out extremely easily, making it possible to realize accurate application of the pressure contact terminal.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a conventional shielded wire, and Fig. 2 A, B, and C show an embodiment of the present invention.
A is an explanatory diagram showing how the shielded wire and the pressure contact terminal are applied, B is a cross-sectional view showing the shielded wire, and C is a cross-sectional view showing the state in which the fork-shaped terminal of the pressure contact terminal is connected to the insulated wire core. Explanation of symbols, 1...Conductor, 2...Insulator, 3
a, 3b... Shield conductor, 4... Insulated wire core, 5
... Shield conductor (drain wire), 6 ... Semiconductive coating, 7 ... Shield wire core, 8 ... Shield layer, 9 ... Sheath, 9a ... Cutting part, 10 ...
Shielded electric wire, 20... Pressure contact terminal, 21... Fork-shaped terminal, 21a... Expansion guide portion, 22...
Housing, 23...lid member.

Claims (1)

[Claims for Utility Model Registration] At least one insulated wire core consisting of a conductor and an insulator, and a shielded conductor that is provided parallel to the insulated wire core and has the same outer diameter as the conductor, and has the same insulator as the insulator. A shield layer comprising a shield wire core coated with a semiconductive material having an outer diameter, and a conductive plastic that commonly surrounds the insulated wire core and the shield wire core and is electrically connected to the shield wire core. and a sheath provided on the outer periphery of the shield layer, a mold release agent is applied on the outer periphery of the insulated wire core and the shield wire core, and the shield layer made of conductive plastic is arranged on the outer periphery of the insulated wire core. and a shielded wire, comprising a portion surrounding the entire outer periphery of the shielded wire core and a connecting portion connecting the surrounding portions to each other.