JPH05159629A - Electric wire - Google Patents

Abstract

PURPOSE:To improve the connection reliability of an electric wire at the time of pressure-contact to a pressure-contact terminal without deteriorating the cable arranging property to vehicles. CONSTITUTION:Compression parts S, in which a flux of element wires 5 are compressed so that multiple element wires 5 contact to each other tightly, and non-compression parts R, in which a flux of the element wires 5 is not compressed, are provided alternately in the longitudinal direction. A pressure- contact terminal is made to pressure-contact to the compression part S for connection from the outside of a covering member 7 to prevent the separation of the element wires 5 at the time of contact-pressure. Since the non-compression parts R having a high flexibility are provided alternately with the compression parts S to secure the flexibility of the whole of an electric wire and improve the cable arranging property to vehicles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire in which a pressure contact terminal is pressure-contacted to the end of the electric wire from the outside of a covering member.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, a wire harness used in, for example, an automobile is formed by twisting a plurality of thin wires 1 and covering the wires 1 with a covering member 3 such as vinyl chloride. A covered electric wire with electrical insulation is used. A terminal fitting is connected to the end of the electric wire, and the terminal fitting is fixed in the connector. As the terminal fitting, the covering member 3 at the end of the electric wire is peeled off and directly contacted with the internal wire 1 for crimping. Crimp terminals are common. However, in recent years,
There has been proposed a technique for improving the assembly efficiency of a wire harness by using a so-called press-contact terminal, in which a terminal fitting and an element wire are electrically connected to each other by simply press-contacting the outside of the cover member without peeling off the cover member (Japanese Patent Laid-Open No. Sho 60). -91573 gazette).

As an electric wire advantageous when using the pressure contact terminal, a plurality of strands 1 are twisted together and then compressed by squeezing with a die, and as shown in FIG. A thin-walled low-voltage electric wire for automobile compression conductor (C
AVS), and since the conductor part is compressed against the disengagement of the wires 1 during pressure welding, it is difficult for the wires to dissociate, and the connection reliability between the wires 1 and the pressure contact terminals during pressure welding is high. The nature is improving.

[0004]

However, in such a compressed electric wire, although the connection reliability between the wire and the press contact terminal at the time of press contact is improved, the electric wire as a whole is lacking in flexibility as a side effect of compression, so that The ability to route to is poor.

Therefore, an object of the present invention is to improve the connection reliability during press contact without deteriorating the installation property to the vehicle.

[0006]

In order to achieve the above-mentioned object, the present invention is to bundle a plurality of wires and coat them with a coating member.
In a wire harness for electrically connecting a wire and a pressure contact terminal by pressure-contacting from the outside of the covering member with a pressure-contact terminal, a compression portion in which the wire is compressed so that the plurality of wires are in close contact with each other, and the wire is compressed. Non-compressed portions are provided alternately in the length direction, and the pressure contact terminals are pressure-connected to the wire of the compression portion from the outside of the covering member.

[0007]

According to the electric wire having such a structure, the plurality of strands are in close contact with each other and the bundle of the strands is firmly formed in the compression portion.
By press-connecting the press-connecting terminals from the outside of the covering member, the bundle of strands at the press-contacting part is less likely to disperse and the connection reliability during press-contacting is improved, while the highly flexible non-compressed part Since the wires are arranged alternately in the length direction, the flexibility of the entire electric wire is secured, which improves the wiring property to the vehicle.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a covered electric wire used as a wire harness showing an embodiment of the present invention. This electric wire is a covered electric wire in which a plurality of wires 5 are twisted together, and the wires 5 are covered by a covering member 7. The portions R are alternately provided in the length direction of the electric wire. The compression unit S is
As shown in FIG. 2 which is a cross-sectional view taken along the line BB of FIG. 1, the internal wires 5 are crushed and closely adhered to each other so that the electric wire as a whole is made rigid, and FIG. 3 is a cross-sectional view taken along the line CC of FIG. The outer diameter is smaller than that of the non-compressed portion R shown.

As a manufacturing method, a die is used for compression processing of the wire 5 of the compression section S, and the wire 5 is intermittently compressed in the length direction and uncompressed in accordance with the requirements of the wire. Repeatedly, the coating member 7 is coated on the strand 5 compressed in the next step.

Since the compression section S is rigid as a whole with no gaps between the plurality of wires 5, the bundle of the wires 5 is unlikely to be separated even if the pressure contact terminal is pressed from the outside of the covering portion 7. The decrease in the contact load between the wire 5 and the pressure contact terminal and the decrease in connection reliability due to

On the other hand, the non-compressed portion R has a high flexibility because the strands 5 are simply bundled into a stranded wire and not subjected to compression processing. Therefore, the entire electric wire including the compressed portion S is also flexible. The property is sufficiently secured, and therefore, when used as a wire harness in a vehicle, the wiring property is excellent.

As described above, by connecting the pressure contact terminal to the compression portion S, the strands 5 are prevented from being separated during the pressure contact, but in order to prevent the pressure contact terminal from being pressed against the non-compression portion R by mistake. The means for distinguishing between the compressed portion S and the non-compressed portion R are: (1) The covering member 7 is marked at the time of manufacturing.

(2) The covering member 7 is made transparent.

(3) Utilizing the difference in outer diameter.

There are methods such as

The electric wire of the above-mentioned embodiment is slightly inferior in appearance because the outer diameter of the compressed portion S is smaller than that of the non-compressed portion R, but in order to prevent this, the thickness of the covering member 7 in the compressed portion S should be reduced. It may be thicker than the wall thickness of the covering member 7 in the non-compressed portion R. As a result, the diameter can be made substantially the same over the entire length of the electric wire.

[0018]

As described above, according to the present invention, a compressed portion obtained by compressing a bundle of strands and a non-compressed portion not compressed so that a plurality of strands come into close contact with each other are arranged in the longitudinal direction. By alternately arranging the compression member and connecting the pressure contact terminal from the outside of the covering member to the compression element to connect it to the internal element wire, the bundle of element wires does not easily come apart due to the pressure contact, and the connection reliability at the time of pressure contact is improved. On the other hand, since the non-compressed parts with high flexibility are alternately arranged in the length direction with respect to the compressed parts, the flexibility of the entire electric wire is secured, which allows the wiring to the vehicle. Can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric wire showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a sectional view taken along line CC of FIG.

FIG. 4 is a perspective view of a conventional electric wire.

5 is an enlarged sectional view taken along line AA of FIG.

[Explanation of symbols]

 5 Strand 7 Covering member S Compressed part R Non-compressed part

Claims (1)

[Claims] 1. A plurality of wires are bundled and covered with a covering member,
In an electric wire that press-connects a wire from the outside of the covering member with a press-connecting terminal to connect the wire and the press-connecting terminal, a compression portion in which the wire is compressed so that the plurality of wires are in close contact with each other, and the wire is not compressed. An electric wire characterized in that non-compressed portions are alternately provided in the length direction, and the press-connecting terminal is press-connected to the strand of the compression portion from the outside of the covering member.