JPH09115337A - Wire harness and its connection - Google Patents

Abstract

(57) [Abstract] [Problem] Conventionally, a shielded electric wire having a plurality of core wires 1 is used, and therefore there is a problem that the work of attaching terminals to the plurality of core wires 1 is very troublesome. It was SOLUTION: In a wire harness including a shielded electric wire, a shielded electric wire of a single core type is used without using a shielded electric wire of a plurality of cores, which facilitates the work of exposing a conductor of the shielded electric wire. This is to improve the efficiency of the work of attaching the terminal to the conductor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness used as electric wiring in an automobile, for example, and a connecting portion thereof.

[0002]

2. Description of the Related Art A wire harness is a bundle of a large number of insulated electric wires. As an insulated electric wire, a conductor provided with an insulating layer is generally used. However, a shield layer is provided on the outer periphery of the conductor. May include shielded wires. As shown in FIG. 4, a conventional shielded wire has a structure in which a plurality of core wires 1 and drain wires 2 are covered with a shield layer (metal foil) 3 and an outer cover 4 such as insulating plastic is covered on the outer periphery thereof. It was

This shielded electric wire, as shown in FIG.
The terminal 5 was connected to the conductor 1A of the core wire 1, and the drain wire 2 exposed from the jacket 4 was connected to the ground conductor 6 using the crimp terminal 7.

[0004]

However, as described above,
As the shielded electric wire, one having a plurality of core wires 1 is used, and the drain wire 2 and the ground conductor 6 are crimped terminals 7
However, the work of connecting terminals to the plurality of core wires 1 of the shielded electric wire and the work of connecting the drain wire 2 and the ground conductor 6 with the crimp terminal 7 are very troublesome.

That is, when a shielded wire having a plurality of core wires 1 is used, the plurality of core wires 1 are not located at the center of the shielded wire, so that the conductor 1A of the core wire 1 is exposed. Had to be peeled off manually by a person, and the work was very troublesome. Moreover, a crimping tool or the like is required to connect the drain wire 2 and the ground conductor 6 by using the crimping terminal 7, and the work is very troublesome.

[0006]

The present invention has been made to solve the above problems, and the invention according to claim 1 is
In a wire harness including a shielded electric wire, the shielded electric wire is a one-core type shielded electric wire, and does not include a multi-core type shielded electric wire.

Further, the invention according to claim 2 is a shield layer of the one-core type shielded electric wire in a connecting portion of a wire harness including a one-core type shielded electric wire and not including a plurality of core-type shielded electric wires. Is a connection part of a wire harness, characterized in that is electrically connected to a ground conductor with a pressure contact terminal.

As the shielded electric wire included in the wire harness, only the one-core type shielded electric wire is used and the plural-core type shielded electric wire is not used, so that the conductor is arranged in the center of the one-core type shielded electric wire. For the jacket,
The work of exposing the conductor by removing the shield layer and the insulating layer by a predetermined length can be easily performed. Therefore, the work of attaching a terminal to the conductor of the shielded electric wire can be easily performed.

When the shield layer of the one-core type shielded wire is electrically connected to the ground conductor by using the pressure contact terminal, the shield layer of the shielded wire and the ground conductor are connected to the pressure contact terminal to connect the two. Therefore, the connection work can be easily performed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a one-core type shielded electric wire 10 used in the present invention. This one-core type shielded electric wire includes a conductor 11 arranged at the center and an insulating plastic provided on the outer periphery of the conductor 11. Insulating layer 12 formed of
A shield layer 13 formed on the outer periphery of the insulating layer 12 with a metal foil or a conductive plastic, and a jacket 14 formed on the outer periphery of the shield layer 13 with an insulating plastic or the like. It is configured.

As shown in FIG. 2, this single-core shielded electric wire 10 is used as a wire harness by being bundled together with a general insulated electric wire 20 having an insulating layer provided on the outer periphery of a conductor. At this time, the wire harness does not include the multi-core shielded electric wire as shown in FIG.

In order to connect a terminal to the conductor 11 of the one-core shielded electric wire 10, the jacket 14, the shield layer 13 and the insulating layer 12 are removed by a predetermined length to expose the conductor 11, and the exposed conductor 11 is exposed. The terminal is connected to. Since the conductor 11 is arranged at the center of the one-core type shielded electric wire 10, the jacket 14, the shield layer 13 and the insulating layer 12 are provided.
The work of exposing the conductor 11 by removing a predetermined length can be easily performed. In addition, the work of exposing the conductor 11,
The terminal attaching work and the terminal inserting work into the connector can be easily automated by a machine, and the productivity can be improved.

FIG. 3 shows a connecting portion between the shield layer 13 and the ground conductor 30 of the one-core shielded electric wire 10. Shield layer 13 of shielded wire 10 and ground conductor 3
It is connected to 0 by a pressure contact terminal 40. That is, the pressure contact terminal 40 includes the shield layer pressure contact portion 41 and the ground conductor pressure contact portion 4.
2, the shield layer 13 is connected to the shield layer pressure contact portion 41, and the ground conductor 30 is connected to the ground conductor pressure contact portion 42 by pressure contact.

As described above, when the shield layer 13 of the shielded electric wire 10 and the ground conductor 30 are connected by using the pressure contact terminal 40, the shield layer 13 is connected to the shield layer pressure contact portion 41 and the ground conductor pressure contact portion 42 of the pressure contact terminal 40. Since it is only necessary to insert the ground conductor 30 and the ground conductor 30, it is possible to electrically connect the both.

The number of single-core shielded electric wires used in the wire harness according to the present invention is not particularly limited, and one or plural ones may be arbitrarily used depending on the circuit condition. .

The shape of the pressure contact terminal used in the connection portion of the wire harness according to the present invention is not particularly limited, and for example, one pressure contact groove has both the shield layer pressure contact portion and the ground conductor pressure contact portion. It may have a structure.

[0017]

As described above, in the wire harness according to the present invention, as the shielded wire included in the wire harness, only the single-core type shielded wire is used, and the multi-core type shielded wire is not used. The work of attaching a terminal to the conductor of the one-core shielded electric wire can be easily performed.

Further, in the connection portion of the wire harness according to the present invention, since the shield layer of the one-core type shielded electric wire is electrically connected to the ground conductor by using the pressure contact terminal, the connecting work is easily performed. be able to.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a single-core shielded electric wire used in the present invention.

FIG. 2 is a sectional view showing an embodiment of the wire harness according to the present invention.

FIG. 3 is a front view showing an embodiment of the connection portion of the wire harness according to the present invention.

FIG. 4 is a cross-sectional view of a multi-core shielded electric wire.

FIG. 5 is an explanatory view showing a connection portion between a conventional multi-core shielded electric wire and a ground conductor.

[Explanation of symbols]

 10 shielded wire 11 conductor 12 insulating layer 13 shield layer 14 outer sheath 20 general insulated wire 30 ground conductor 40 pressure contact terminal 41 shield layer pressure contact part 42 earth conductor pressure contact part

Claims (2)

[Claims] 1. A wire harness including a shielded electric wire, wherein the shielded electric wire is a single-core type shielded electric wire, and does not include a multi-core type shielded electric wire. 2. In a connecting portion of a wire harness including a one-core type shielded electric wire and not including a plurality of core-type shielded electric wires, the shield layer of the one-core type shielded electric wire is electrically connected to a ground conductor by a pressure contact terminal. The connection part of the wire harness, which is characterized in that it is electrically connected.