JP3516042B2 - Flat shielded cable - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat shielded cable, and more particularly to a flat shielded cable which is advantageous for a pressure contact connection system.

[0002]

2. Description of the Related Art A flat shielded cable is disclosed in Japanese Unexamined Patent Publication No.
As disclosed in Japanese Patent Publication No. 37437-37, a shielded wire including two insulated electric wires and a drain wire arranged in parallel with each other is often used as a shielded wire for automobiles. In this type of flat shielded cable, a compression stranded wire has been conventionally used as a conductor of an insulated wire and a conductor of a drain wire.

For shielded wires for automobiles, further miniaturization of connectors is required, and there is a technical demand that the distance between the centers of insulated wires, that is, the pitch be 2.0 mm. To meet this demand, considering that the insulated wire is covered with a shielding tape such as copper-coated aluminum polyester tape for shielding and aluminum-coated polyester tape, the finished outer diameter of the insulated wire is 0.9 mm or less. Need to

By the way, the compression stranded wire conventionally used as the conductor of the electric wire of this type of flat shielded cable has a diameter of 0.7 mm in the 0.3 sq specification and a diameter of 0.9 mm in the 0.5 sq specification. Finishing outer diameter is 0.3sq specification
It is 1.1mm and the diameter is 1.3mm with 0.5sq specifications. Therefore, when making a flat shielded cable using such an electric wire, 2.5 mm becomes the minimum pitch in consideration of covering the insulated electric wire with a shield tape. In other words, in order to achieve the required pitch, it is necessary to keep the finished diameter of the wire to 0.9 mm or less, and it is conceivable to reduce the diameter of the conductor of the wire. It cannot be adopted because it may reduce the basic performance of.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a flat shielded cable which can reduce the pitch between conductors without deteriorating the basic performance. In addition, the present invention is a 0.3 sq currently requested.
Another object is to provide a flat shielded cable that can achieve a conductor pitch of 2.0 mm with the specifications and 0.5 sq specifications. Another object of the present invention is to provide a flat shielded cable that is advantageous when applied to a pressure connection method.

[0006]

The present inventor has completed the present invention as a result of intensive studies to solve the above problems. That is, according to the present invention, a plurality of electric wires and a drain wire are juxtaposed to each other, and in a flat shielded cable formed by covering these with a shielding tape and an insulating sheath, the electric wires are made of enamel wire. There is provided a flat shielded cable. According to the invention, in the above configuration,
There is provided a flat shielded cable in which a pressure contact connector or a crimp terminal is applied to an end of the flat shielded cable. According to the invention, in the above configuration,
There is provided a flat shielded cable, wherein the flat shielded cable is a shielded wire for an automobile. Furthermore, according to the present invention, in the above configuration,
The flat shielded cable is 0.3sq specification or 0.5sq
A flat shielded cable is provided that is characterized.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to examples. In FIG. 1, reference numeral 1 indicates a flat shielded cable according to the present invention. This shielded cable 1 has two electric wires 2, 3 as in the conventional case.
And a drain wire 4, these elements 2 to 4 being juxtaposed parallel to each other, and two electric wires 2, 3
The drain wire 4 and the drain wire 4 are covered with a common copper-coated aluminum polyester tape 5 for shielding, and the outer periphery of the shield tape 5 is covered with an insulating sheath 6 made of PVC, polyolefin resin or the like as in the conventional case.
The flat shielded cable 1 according to the present invention includes an electric wire 2,
Enameled wire as a single conductor is adopted as the drain wire 3 and the drain wire 4.

Enamel wire, as is known, has a thickness of 0.02
Although it is very thin with a thickness of 0.3 mm, it is baked and coated with an insulating material. With the 0.3 sq specification, the diameter of the conductor is 0.7 mm, and the diameter of the enameled wire is 0.74 mm. Also, in the 0.5sq specification, the diameter of the conductor is 0.85mm, and the diameter of the enameled wire is 0.89mm. In the drawing, reference numeral 7 indicates an insulating material baking layer of the enamel wire. From the above, by adopting enamel wire as the electric wire, even if it is 0.3sq specification and 0.5sq specification, electric wire 2,
Since the finishing diameter of No. 3 can be suppressed to 0.9 mm or less, the pitch P between the electric wires 2 and 3 can be set to 2.0 mm.

Further, since the flat shielded cable 1 according to the present invention uses the enamel wire as the electric wires 2, 3 and the drain wire 4, there is no twist variation unlike the conventional stranded wire, and therefore, The contact resistance of the contact of the press-connecting connector (not shown) has an advantage that it is more stable than a shielded cable using a stranded wire.

Further, although the enameled wire is inferior in flexibility to a stranded wire as a single unit, in a multi-core structure such as a flat shielded cable, stress is dispersed, so that the flexibility of each enameled wire is improved. There is an advantage of doing.

FIG. 2 shows a manufacturing system for the flat shielded cable 1 according to the present invention. This manufacturing system 10
Is a molding machine 11 for coating an enamel wire with a shield tape and an extrusion machine 1 for an insulating sheath, as in the conventional case.
2, a water tank and a winder 13, and the sealing tape molding machine 11 is supplied with respective materials from the drain wire supply source 14, the enamel wire supply source 15 and the shield tape supply source 16, and is insulated. Extruder 12 for sheath,
The final product produced through the water tank and the winder 13 is wound on the reel winder 17.

[0012]

According to the present invention, since the above configuration is adopted, the following remarkable effects can be obtained. The enameled wire used in the present invention has a thickness of 0.02 as known.
Although it is very thin as mm, it is baked and coated with an insulating material. For example, in the 0.3 sq specification, the diameter of the conductor is 0.7 mm, and the diameter of the enameled wire is 0.74 mm. Also, in the 0.5sq specification, the diameter of the conductor is 0.85mm, and the diameter of the enameled wire is 0.89mm. That is, the diameter of the enameled wire is smaller than that of an electric wire made of a stranded wire that has been conventionally used, and thus the pitch between the conductors of the flat shielded cable can be reduced. Further, the flat shielded cable according to the present invention is typically a shielded wire for automobiles,
Even with q specifications and 0.5sq specifications, the diameter of the wire made of enameled wire can be suppressed to 0.9 mm or less,
It is possible to set the pitch between wires to the required pitch of 2.0 mm. Further, the flat shielded cable according to the present invention does not cause twist variation unlike the conventional twisted wire, and therefore the contact resistance at the contact of the pressure contact connector (not shown) is higher than that of the shielded cable using the twisted wire. Since it is stable and stable, there is an advantage that it can be advantageously applied to the pressure connection method.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a flat shielded cable according to the present invention.

FIG. 2 is an overall system diagram of a manufacturing system that can be used for manufacturing a flat shielded cable according to the present invention.

[Explanation of symbols]

1 Flat shielded cable Electric wire consisting of a few enamel wires 4 Drain wire made of single-core conductor 5 shield tape 6 Insulation sheath

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-37437 (JP, A) Actually open 3-12311 (JP, U) Actually open 3-33911 (JP, U) Actually open 62- 20416 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01B 7/08

Claims (5)

(57) [Claims] 1. A flat shielded cable in which a plurality of electric wires and a drain wire are juxtaposed to each other, and these are covered with a shielding tape and then covered with an insulating sheath, wherein the electric wires are composed of an enameled wire. Flat shielded cable characterized by. 2. The flat shielded cable according to claim 1, wherein a pressure contact connector or a crimp terminal is applied to an end of the flat shielded cable. 3. The flat shielded cable according to claim 1, wherein the flat shielded cable is an automobile shielded wire. 4. The flat shielded cable is 0.3 s
The flat shielded cable according to claim 3, wherein the flat shielded cable has q specification or 0.5 sq specification. 5. The flat shielded cable according to claim 4, wherein the pitch between the electric wires is 2.0 mm.