JPH0992041A - Wiring cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring cable that can be used under such conditions as repeated twisting or torsion. SOLUTION: A plurality of conducting wires 3, each comprising a conductor 1 covered with an insulator 2, are used as they are held parallel to one another and wound spirally on a rod 6 serving as a core which is made from plastic or the like that resists bending. The conducting wires 3 are twisted with respect to the rod 6 and a sheath 5 by being wound and having an extra length to cope with bending or torsion from the outside, so as to be able to absorb these external forces within a cable to enable the cable to be used without disconnection.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wiring cable,
Particularly, the present invention relates to a wiring cable used for a movable part.

[0002]

2. Description of the Related Art A conventional wiring cable is shown in FIG. The conductor 3 is formed by covering a conductor (core) 1 with an insulator 2, and a plurality of conductors 3 are housed in a shield 4 and covered with a jacket.

[0003]

When the conductor 3 is bent, since the conductor 3 is in a state where the core conductors 1 are straightly gathered in the insulator 2 as shown in the sectional view of FIG. As shown in FIG. 5, the bent outer conductor 1 is pulled left and right, and the inner conductor is compressed. When an unreasonable force such as bending or twisting is applied, the conductor 1 cannot withstand the force and is repeatedly applied, so that there is a problem that the wire is finally broken.

In the example of FIG. 3, two conductors 3 are twisted, but even with this structure, the above problem is not solved and it is weak against repeated bending and twisting. Due to repeated fatigue caused by, the shield 4 was torn and the conductor 1 was pierced and short-circuited.

An object of the present invention is to provide a bending resistant cable which can be used without breaking even under the condition of repeated bending and twisting.

[0006]

The above object is achieved by a cable in which a rod made of a material such as plastic that is resistant to bending is used as a core, and a conductor wire in which a conductor is covered with an insulator is spirally wound around the rod body. To be done.

Further, the above object is achieved by a cable in which a plurality of conductors are wound around a rod body in a spiral shape with the conductors being parallel to each other.

By using the above cable, the conductor wire is helically wound around the core rod body, so that when repeated bending or twisting force is applied, this can be absorbed internally, and the conductor wire is It is not subject to repeated fatigue, so it can be used without breaking wires.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to embodiments. FIG. 1 shows an embodiment of the present invention, and the conductor 3 is formed by covering a conductor (core) 1 with an insulator 2 as in the conventional case. The conductor 3 is spirally wound around a rod body 6 made of a material strong against bending.

The rod 6 is made of a flexible plastic material, a rubber material, or other flexible material. A plurality of (three in the figure) conducting wires 3 are wound around this core.
That is, the three conductors 3 are wound in parallel and spirally wound, and by winding in this manner, the conductor 3 to be wound is wound.
Any number can be used, and by winding each conductor wire in parallel, the rod body 6 can be wound around an average length.

In this manner, by winding the spiral wire, the conductive wire 3
Is twisted from the beginning with respect to the plastic rod body 6 and the outer cover 5, and therefore, even if a bending force or the like is applied from the outside, there is a margin in the length in the bending direction. It can be absorbed in the cable (cover 5).

FIG. 2 shows a state in which the external force applied to the cable is used for a movable portion to which repeated bending 7 and repeated twisting force 8 are applied.

Even when repeated bending and twisting are applied in this way, since there is a margin in the length in the bending direction, the bending force can be absorbed inside the cable, and the conductor wire does not fatigue repeatedly. Therefore, it can be used without causing wire breakage.

[0014]

As described above, according to the present invention, it is possible to provide a cable which can be used under the condition of repeated bending and twisting and is free from disconnection due to repeated fatigue.

[Brief description of drawings]

FIG. 1 is a structural view of an embodiment of the present invention.

FIG. 2 is an explanatory view of a usage state of FIG.

FIG. 3 is a conventional structural diagram.

FIG. 4 is a cross-sectional view of a conductor wire.

FIG. 5 is a cross-sectional view when a conductor wire is bent.

[Explanation of symbols]

1 ... Conductor (wire core), 2 ... Insulator, 3 ... Conductor wire, 5 ... Jacket,
6 ... Stick.

Claims (3)

[Claims] 1. A wiring cable, characterized in that a rod body made of a material resistant to bending is used as a core, and a conductor wire obtained by coating a conductor with an insulator is spirally wound around the rod body. 2. A rod body made of a material which is resistant to bending is used as a core, and a plurality of conductor wires each having a conductor coated with an insulator are spirally wound around the rod body with the respective conductor wires being parallel to each other. Cable for wiring. 3. The wiring cable according to claim 1, wherein a plastic material is used for the rod body.