TWM513442U - Multicore cable - Google Patents

Description

Multi-core cable

The present invention relates to a multi-core cable.

In general, a multi-core cable is formed such that the core wire is rounded in a circular shape to ensure its strength, and the outer side is covered by the outer portion. However, the cross-sectional shape of the outer quilt also becomes circular. On the other hand, a wide-band ribbon cable in which core wires are arranged in the width direction is known (for example, refer to Patent Document 1).

Patent Document 1: Japanese Laid-Open Patent Publication No. 60-59608

As described above, the general multi-core cable has a circular cross-sectional profile. Therefore, a gap is created when the cable is rolled up. Further, it is difficult to know whether or not the cable is twisted, and it is difficult to know whether or not the twist direction of the cable is fixed. Therefore, there is a tendency for the torsional load to be large when the cable is used.

On the other hand, as disclosed in Patent Document 1, a wide-band ribbon cable in which core wires are arranged side by side in the width direction is thin and easy to be bent, and is used in a space where the wiring inside the machine is narrow, but also in the direction in which the core wires are arranged. Bending and difficult to wire.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-core cable capable of reducing a torsional load during use without causing a gap when rolling up.

The multi-core cable of the same state has three or more core wires, a covering material including a braided or a horizontal coil, and a total of the plurality of core wires are covered and covered. The shielding portion is covered with the entire shielding portion, and the external cross-sectional outer shape is a substantially square shape having a major axis/short diameter ratio of 1.2 or less and a square shape.

According to the multi-core cable of the present invention, it is possible to prevent a gap from being generated when winding up, and it is easy to wire and reduce the torsional load during use.

1‧‧‧Multi-core cable

2‧‧‧Multiple core wires

2A, 2B‧‧‧ coaxial wire

2C‧‧‧insulated wire

3‧‧‧Metal strip

4‧‧‧General cover

5‧‧‧External

Fig. 1 is a cross-sectional view showing a specific example of a multi-core cable of an embodiment of the present invention.

[Description of Embodiments of the Present Invention]

First, the embodiments of the present invention will be described. In the multi-core cable system according to the embodiment of the present invention, (1) has a plurality of core wires and a shield material that is woven or included in a roll, and the plurality of core wires are collectively covered to cover the total shielding portion. The overall shielding portion is covered, and the outer cross-sectional shape of the outer cover is a substantially square shape of a square having a long diameter/short diameter ratio of 1.2 or less. According to the configuration of (1), since the outer cross-sectional shape is a square shape which is close to a square, when rolled up to a cable reel or the like, the multi-core cables can be wound up in a plane contact with each other without generating a gap. Moreover, it is easy to visually recognize that it is twisted by a slight square shape, and it is easy to determine whether the twist direction of the multi-core cable is fixed. Therefore, the torsional load at the time of use can be reduced in such a manner that the twisting direction is kept constant.

(2) The collective shielding portion has a shape in which a cross section perpendicular to the longitudinal direction is slightly circular, and the plurality of core electric wires are bundled in the collective shielding portion. According to the configuration of (2), the plurality of core electric wires can be bundled in a circular manner so as to be externally attached to the entire shielding portion, and the strength of the bundled electric wires can be made strong.

(3) The outer cover is composed of an extruded body of a thermoplastic resin. According to the configuration of (3), the outer cover can be easily formed by extrusion molding.

(4) The collective shielding portion includes: a braided material that is woven or rolled in any one of a bare wire of a copper wire, a tin-plated wire, and a silver-plated wire, and a metal strip that is provided in the masking material. According to the configuration of (4), since the collective shielding portion is provided with a metal strip for the braiding of the bare wire, the tin-plated wire, or the silver-plated wire of the copper wire or the horizontally wound masking material, the shielding performance can be improved.

(5) The plurality of core electric wires are arranged in plural layers. According to the configuration of (5), the inner side of the collective shielding portion can contain more electric wires.

(6) The long diameter of the outer cross-sectional shape of the outer cover is 5.0 mm or less. According to the configuration of (6), it can be applied to a small-diameter multi-core cable of 5.0 mm or less.

[Details of the embodiment of the present invention]

A specific example of the multi-core cable of the embodiment of the present invention will be described with reference to the following drawings. In addition, the present invention is not limited to the examples, and is intended to include all modifications within the meaning and scope of the novel application scope.

The multi-core cable 1 of the present embodiment has a plurality of core wires 2 of three or more. For example, in Fig. 1, as the plurality of core electric wires 2, there are two coaxial electric wires 2A, seven coaxial electric wires 2B, ten insulated electric wires 2C, and 19 electric wires (19 cores) are used.

The structure of the coaxial electric wires 2A and 2B has, for example, a center conductor, an insulator covering the outer periphery thereof, an outer conductor, and an outer cover (for example, an AWG 40 (outer diameter of outer diameter is 0.35 mm)). Further, the insulated wire 2C has a conductor and an outer cover (for example, the AWG 36 (outer diameter of the outer cover is 0.29 mm)). The coaxial wire that can be used in the present invention is a wire that is thinner than AWG36 (outer diameter 0.6 mm). It is preferably a wire which is thinner than AWG 40 (outer diameter 0.35 mm).

A plurality of core wires 2 are bundled in a slightly circular shape as viewed from a section perpendicular to the longitudinal direction. For example, in the example of Fig. 1, the two layers are each bundled in a circular shape. The set outer diameter of the two layers is, for example, about 1.7 mm. Thus, the strength of the plurality of core electric wires 2 can be made strong by the bundle of the circular bundles. Further, by making it a plurality of layers (here, two layers), the inner side of the collective shielding portion 4, which will be described later, can include more electric wires. Further, the plurality of core wires 2 of the above two layers can also be collectively twisted together, or the inner layer can be twisted and the outer layer can be overlapped and laminated on the outer layer.

However, the collective shielding portion 4 is provided in such a manner that the plurality of core electric wires 2 are externally attached to the bundled circle. The collective shielding portion 4 is formed of a braided copper wire or a copper alloy wire or a horizontally wound tape. The copper wire or the copper alloy wire may be any of a bare wire, a tinned wire, or a silver plated wire. In the example of Fig. 1, the collective shielding portion 4 is a tinned copper alloy wire. Further, in order to improve the shielding performance, the metal strips 3 can be arranged in parallel. In the example of FIG. 1, the metal strip 3 is disposed inside the collective shielding portion 4.

However, the collective shielding portion 4 is covered by the insulating member 5 . Further, 5 is an extruded body of a thermoplastic resin, and as the thermoplastic resin, for example, PVC (polyvinyl chloride), polyurethane, polyethylene, polypropylene, fluororesin or the like can be used. Thus, the outer cover 5 can be easily formed by extrusion molding.

Further, the shape is perpendicular to the transverse cross section perpendicular to the longitudinal direction of the outer quilt 5, and is a square shape having a long square/short diameter ratio of 1.2 or less. When the long diameter/short diameter comparison 1.2 is large, a gap is easily generated when a multi-core cable is wound up to a cable reel or the like. In the example of Fig. 1, the outer diameter 5 has a major axis L1 of 3.0 mm, a minor axis L2 of 3.0 mm, and a long diameter/short diameter ratio of 1.0. This embodiment can be applied to a small-diameter multi-core cable having a long diameter of 5.0 mm or less. The outer diameter of the outer cover can be made 2.0 mm or more. Furthermore, the outer corner of the outer 5 is shown in Figure 1, and can also be used for the chamfering. There is an arc.

Further, in the example of Fig. 1 of the above embodiment, the multi-core cable 1 composed of a plurality of core electric wires 2 (2A, 2B) and insulated electric wires (2C) is shown, but it may be only a coaxial electric wire or only A multi-core cable consisting of insulated wires.

As described above, in the multi-core cable 1 of the present embodiment, since the shape of the outer cover 5 is a substantially square shape close to a square, when the cable is wound up to a cable reel or the like, the multi-core cables 1 can be in planar contact with each other without gaps. And rolled up. Further, it is easy to visually recognize the twist of 5 in a slightly square shape, and it is easy to determine whether or not the twist direction of the multi-core cable 1 is fixed. Therefore, the torsional load at the time of use can be reduced in such a manner that the twisting direction is kept constant.

1‧‧‧Multi-core cable

2‧‧‧Multiple core wires

2A, 2B‧‧‧ coaxial wire

2C‧‧‧insulated wire

3‧‧‧Metal strip

4‧‧‧General cover

5‧‧‧External

L1‧‧‧Long Trail

L2‧‧‧ Short Trail

Claims (8)

A multi-core cable comprising: a plurality of core wires of three or more, a masking material including a woven or a horizontal roll, and an overall shielding portion covered by the plurality of core wires, covering the collective shielding portion, and characterized by The outer cross-sectional shape of the outer cover is a slightly square shape close to a square with a long diameter/short diameter ratio of 1.2 or less. The multi-core cable of claim 1, wherein the total shielding portion has a shape that is substantially circular in cross section perpendicular to the longitudinal direction, and the plurality of core wires are bundled in the collective shielding portion. A multi-core cable according to claim 1 or 2, wherein the outer casing is composed of an extruded body of a thermoplastic resin. The multi-core cable of claim 1 or 2, wherein the collective shielding portion has a braided or cross-cut masking material of any one of a bare wire, a tinned wire, and a silver-plated wire of a copper wire, and a juxtaposition a metal strip for the masking material. The multi-core cable of claim 4, wherein the plurality of core wires are arranged in a plurality of layers. The multi-core cable of claim 5, wherein the outer diameter of the outer shape of the outer cover is 5.0 mm or less. The multi-core cable according to claim 5, wherein the plurality of core electric wires are composed of an insulated electric wire and a coaxial electric wire, and the core electric wires are disposed in two layers, and the coaxial electric wires are disposed only on the outer layer. Such as the multi-core cable of claim 6 of the patent scope, wherein the plurality of core wires are The insulated electric wire and the coaxial electric wire are configured, and the core electric wire is disposed in two layers, and the coaxial electric wire is disposed only on the outer layer.