JP2002042917A - Shielded electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shielded electric wire having a improved waterproof processing. SOLUTION: Waterproof treatment is given to the shielded electric wire 21, separately at its terminal connection portion 9 and at its shield treatment portion 13. For the waterproof treatment, resins 22, 23 having insulating property and thermoplastic property, are molded separately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded electric wire, and more particularly, to a shielded electric wire having an improved waterproof treatment at a terminal portion.

[0002]

2. Description of the Related Art Shielded wires are widely used as power supply wires for automobile batteries and control signal wires. The shielded electric wire has a ground portion such as a braided wire in its structure, and promotes removal of electric discharge and electromagnetic noise.

[0003] The shielded electric wire is configured as described below. In FIG. 2, the shielded electric wire 1 includes a conductor 2, an insulator 3 covering the conductor 2, a braided wire 4 provided outside the insulator 3, and a sheath 5 covering the braided wire 4. The terminal 6 is connected to the conductor 2. That is, the connecting pieces 7 of the terminal 6 are connected to the conductor 2.
Are caulked, and these are electrically connected. The holding pieces 8 of the terminal 6 are crimped to the insulator 3. Portions crimped by the connection pieces 7, 7 and the holding pieces 8, 8 are formed as terminal connection portions 9 in the shielded electric wire 1.

On the other hand, a shield pipe 10 is provided outside the sheath 5. In the shield pipe 10,
The ground part 11 is attached by welding. The grounding portion 11 is attached to an attaching portion (not shown) by screws. The braided wire 4 is folded at one end of the shield pipe 10. Outside of the folded braided wire 4,
A ring-shaped shield contact 12 is provided.
The shield contact 12 is securely crimped to securely connect and hold the braided wire 4 to the shield pipe 10. In addition, the shield pipe 10 and the ground part 1
The shield contact 1 and the shield contact 12 are formed from a metal having conductivity, and a braided wire 4 is connected to the shield contact 12 to form a shielded portion 13 of the shielded electric wire 1 at that portion.

[0005] The shielded electric wire 1 constructed as described above usually has a shrinkable tube 1 from the terminal connection portion 9 to the shielded portion 13, which is provided with a hot melt inside.
After being collectively covered with 4, the shrinkable tube 14 is shrunk by heat to be waterproof.

[0006]

By the way, in the above-mentioned prior art, the heat-shrinkable shrinkable tube 14 collectively covers from the terminal connection portion 9 to the shielded portion 13 as described above. Therefore, if there is a gap at the end of the heat-shrinkable shrink tube 14, water may enter the inside through the gap and leak between the terminal connection portion 9 and the shield processing portion 13. . That is,
The conventional waterproofing treatment for the shielded electric wire 1 has an insufficient point.

Accordingly, it is an object of the present invention to provide a shielded electric wire having an improved waterproofing condition.

[0008]

According to another aspect of the present invention, there is provided a shielded electric wire having a conductor covered by an insulator and a braided wire covered by a sheath. A terminal connection portion is formed by connecting a terminal, a shielded portion is formed by connecting a shield pipe and a shield contact to the braided wire, and the terminal connection portion and the shielded portion are waterproofed. In the above shielded electric wire, the waterproof treatment is performed separately on the terminal connection portion and the shield treatment portion. With this configuration, no leak occurs between the terminal connection portion and the shielded portion.

According to another aspect of the present invention, there is provided a shielded electric wire having a conductor covered by an insulator and a braided wire covered by a sheath, wherein a terminal is connected to the conductor. A terminal connection portion is formed, a shielded portion is formed by connecting a shield pipe and a shield contact to the braided wire, and the terminal connection portion and the shielded portion are subjected to a waterproof treatment in a shielded electric wire. The waterproofing process is characterized in that the terminal connecting portion and the shielded portion are separately molded with an insulating resin. With this configuration, no leak occurs between the molded terminal connection portion and the shield processing portion that is also molded separately.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view including a partial cross section showing an embodiment of the shielded electric wire of the present invention. The same components as those of the conventional example are denoted by the same reference numerals, and detailed description will be omitted. That is, each configuration of the shielded electric wire described in this embodiment is almost the same as that described in the related art.

In FIG. 1, a shielded electric wire indicated by reference numeral 21 includes a conductor 2, an insulator 3, a braided wire 4, and a sheath 5. Further, a terminal 6 is connected to the conductor 2, and a terminal connection portion is formed in a portion connected by crimping by the terminal 6 and in the vicinity thereof as in the conventional case. Furthermore, the braided wire 4 has a shield contact 1
2 and the like are connected, and a shield processing portion 13 is formed in the connected portion and in the vicinity in the same manner as in the related art.

[0012] The shielded electric wire 21 of the present invention comprises:
It is characterized in that the waterproof treatment to be applied to the terminal connection part 9 and the shield processing part 13 is separate from the conventional one. In other words, conventionally the shrinkable tube 14
The present invention is characterized in that the terminal connection portion 9 and the shielded portion 13 are collectively waterproofed by using (see FIG. 2), and the present invention is separately waterproofed by molding with resin.

A more detailed description of the waterproofing process is as follows. The terminal connecting portion 9 is molded with a resin 22. The shield processing portion 13 is molded by the resin 23 so as to be separate from the resin 22.
The terminal connection part 9 and the shield processing part 13 are each in a watertight state. As the resin 22 and the resin 23, a resin material having insulating properties and thermoplasticity is used, and in this embodiment, a polyurethane hot melt is applied. In this embodiment, the resin 23 is molded so as to cover the entire shield pipe 10.

As described above, the shielded electric wire 21 of the present invention
Is a waterproof treatment, the terminal connection part 9 and the shield treatment part 1
Since it is separately applied to the components 3 and 3, the leak which has conventionally occurred does not occur. Therefore, the state of the waterproof treatment can be improved as compared with the related art. Since the resin 22 and the resin 23 cover the terminal connection portion 9 and the shield processing portion 13 so as to sufficiently cover each detail, it goes without saying that the waterproof effect is higher than that of the shrinkable tube.

In addition, it goes without saying that the present invention can be variously modified without departing from the gist of the present invention. That is, in the present embodiment, the waterproof treatment is performed with the resin 22 and the resin 23, but it is naturally possible to perform the waterproof treatment separately with two shrinkable tubes. Leakage can be prevented by using a separate shrinkable tube.

Although the terminal connection portion 9 and the shielded portion 13 are kept water-tight by the resins 22 and 23, no leakage occurs even if water enters the terminal connection portion 9 from the resin 22. .

[0017]

Since the present invention is configured as described above, it has the following effects. According to the present invention, since the waterproofing process is divided into a terminal connection portion and a shielded portion and separated from each other, no leakage occurs, and the state of the waterproofing process can be improved.

According to the present invention, since the terminal connection portion and the shielded portion are separately molded with a resin having an insulating property and subjected to a waterproof treatment, no leakage occurs. In addition, since the resin spreads to the terminal connection portion and the details of the shield processing portion, the state of the waterproof processing can be improved from the above.

[Brief description of the drawings]

FIG. 1 is a plan view including a partial cross section showing an embodiment of a shielded electric wire according to the present invention.

FIG. 2 is a plan view including a partial cross section of a conventional shielded electric wire.

[Explanation of symbols]

 2 Conductor 3 Insulator 4 Braided wire 5 Sheath 6 · Terminal 7 ······· Connection piece 8 ································· Terminal connection part 10 ············ Shield pipe 11 ··· ················································································································・ Resin 23 ・ ・ ・ ・ ・ ・ ・ Resin

Claims (2)

[Claims] The present invention has a conductor covered with an insulator and a braided wire covered with a sheath, and a terminal is connected to the conductor to form a terminal connection portion. A shielded wire in which a shielded portion is formed by connecting a shielded contact, and wherein the terminal connection portion and the shielded portion are subjected to waterproofing, wherein the waterproofing process is performed on the terminal connection portion and the shielded portion. A shielded wire characterized by being divided and applied separately. 2. A conductor covered by an insulator and a braided wire covered by a sheath, and a terminal is connected to the conductor to form a terminal connection portion. A shielded wire in which a shielded portion is formed by connecting a shielded contact, and wherein the terminal connection portion and the shielded portion are subjected to waterproofing, wherein the waterproofing process is performed on the terminal connection portion and the shielded portion. A shielded electric wire characterized by being separately molded separately from each other with an insulating resin.