JPS6016004Y2 - insulated wire - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in insulated wires used for wiring audio equipment or consumer equipment.

Figure 1 shows an example of a conventional insulated wire of this type.
is a conductor, and an insulator 2 and a horizontally wound shield 3 are provided on its outer periphery, and the two are arranged in parallel.

A drain wire 4 is attached vertically to the outer periphery of the horizontally wound shield 3, and is covered all together by a jacket 5.

However, conventional insulated wires of this type have the following drawbacks, and improvements have been desired.

That is, (1) When manufacturing an insulated wire, a horizontal winding process of the shield is required, which increases the number of man-hours and increases the price of the wire.

(2) Horizontally wound shields are expensive because they are made of annealed copper wire.

(3) In terminal processing, it is necessary to cut the horizontally wound shield after peeling off the jacket, which increases the number of processing steps and increases the cost.

etc.

FIG. 2 shows another example of a conventional insulated wire, in which an aluminum foil 6 is used as a shield layer, where 1 is a conductor and 2 is an insulator applied to its outer periphery.

Two insulated conductors are arranged in parallel, and a drain wire 4 is arranged at the center thereof.

6 is a shield layer made of aluminum foil attached vertically to the outer periphery of these, and 5 is a jacket further provided on the outer periphery.

However, this insulated wire had the disadvantage that the production speed was slow because aluminum foil was formed vertically and the wire price was high.

In view of the above points, the present invention was developed with the aim of providing an insulated wire that is economically superior and easy to terminally process. , a drain wire located at the center of the insulated conductor, a conductive plastic shield layer extruded around the outer periphery of the drain wire, and a jacket provided around the outer periphery of the drain wire. Located in insulated wires.

Next, one embodiment of the insulated wire of the present invention will be further described with reference to the accompanying drawings.

In FIG. 3, 1 is a conductor, and 2 is an insulator applied to its outer periphery.

Two insulated conductors are arranged in parallel, and a drain wire 4 is arranged at the center thereof.

7 is a conductive plastic whose outer periphery is insulated and acts as a shield layer, and 5 is a jacket provided around the outer periphery.

When the conductive plastic 7 is used as a shield layer, it can be extruded and coated simultaneously with the jacket 5, which has the advantage of facilitating manufacturing.

The conductive plastic 7 also has the advantage of being cheaper than the horizontally wound shield 3.

When coating the conductive plastic 7 by extrusion, if a mold release agent or the like is applied to the insulated conductor to prevent it from coming into strong contact with the insulated conductor, the conductive plastic layer 7 can be peeled off at the same time as the jacket 4 is peeled off during terminal treatment. This has the advantage of making terminal processing easier.

The insulated wire of this embodiment constructed in this way is used to simultaneously run two completely different signals through two insulated conductors, for example when the left and right signals are different in a stereo system. An insulated conductor has exactly the same effect as a shielded coaxial line.

The insulated wire of this example uses conductive plastic as the shield layer, so it is cheaper than a horizontally wound shield, and because it is manufactured by extrusion coating, it is faster than vertically spliced aluminum foil molding. Furthermore, since the drain wire is simply grounded during terminal processing, the conductive plastic is peeled off at the same time as the jacket is peeled off, so there is no need to cut the shield layer in a separate process, making the terminal processing process very easy. .

As explained above, the present invention makes it possible to provide an insulated wire that is inexpensive and easy to terminally process, and has great practical value.

[Brief explanation of drawings]

1 and 2 are explanatory cross-sectional views showing two examples of conventional insulated wires, and FIG. 3 is an explanatory cross-sectional view showing one embodiment of the insulated wire of the present invention. 1: Conductor, 2: Insulator, 3: Horizontal wound shield, 4: Drain wire, 5: Jacket, 6: Aluminum foil shield, 7:
Conductive plastic shield.

Claims (1)

[Scope of utility model registration request] Two insulated conductors arranged in parallel, a drain wire arranged at the center of the insulated conductors, a conductive plastic shield layer extruded around the outer periphery of these conductors, and a jacket provided around the outer periphery. An insulated wire characterized by being composed of