JP2000113917A - Electric wire waterproofing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric wire waterproofing device surely preventing penetration of water into an electric wire by simple and easy processing for preventing generation of electric corrosion or an electrical trouble. SOLUTION: A water proofing device 10 is applied to electrical wiring, in which first electric apparatus 1 and a second electric apparatus 2 are connected together via waterproof connectors 9b, 9a and a branch part 7 branching to another electric apparatus 3 is formed between the waterproof connector 9a and the second electric apparatus 2. The waterproofing device 10 is provided with first and second waterproof connectors 10a, 10b freely fittable to the waterproof connectors 9b, 9a, a covered lead wire 10c, which is the same in a pole as the waterproof connectors 10a, 10b, provided with the first and second waterproof connectors 10a, 10b in both ends, bent upward into an inverted U-shape, and provided with an uncovered core wire exposed part formed partially in the middle, and a waterproof and heat-resistant insulating tube 10d bent into an inverted U-shape with the covered lead wire 10c for covering the exposed part in the covered lead wire 10c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing device for electric wiring, particularly for improving waterproofness of a waterproof connector in electric wiring of a vehicle.

[0002]

2. Description of the Related Art Conventionally, in vehicles such as automobiles,
Various waterproofing measures have been taken for electrical wiring in consideration of being washed by car washing, rain water, etc.For electrical wiring connected to sensors and other electrical components, these electrical components and waterproof connectors are connected. Often connected via.

[0005] For example, the wiring connection shown in FIG. 5A, that is, an electrical component (first electrical component) 1 such as a lamp, an electrical component (second electrical component) 2 such as a control module, and other electrical components 3 and a first electric component 1
5 is connected to the second electrical component 2 by a wiring 5 such as a control line, and the other electrical component 3 is connected to the second electrical component 2 by a wiring 6 such as a control line. The electrical connection shown in (b) is generally performed.

In the electrical connection shown in FIG. 5 (b), a wire harness 8 is formed at a branch portion 7 which branches in three directions (covered leads 8a, 8b, 8c), and one covered lead of the wire harness 8 is formed. A waterproof connector (second electrical component-side connector) 9a is provided at the end of 8a, and the waterproof connector (first connector) at the end of the coated lead wire 1a extending from the first electrical component 1 is provided.
(The electrical component side connector) 9b to be connected while maintaining waterproofness, and further, one of the coated lead wires 8b is connected to the second
And the other coated lead wire 8c is connected to another electrical component 3. Although not shown, a waterproof connector is used as necessary also in the connection between the covered lead wire 8b and the second electrical component 2 or in the connection between the covered lead wire 8c and another electrical component 3.

As the waterproof connectors 9a and 9b, those having waterproofness and internal ventilation are used.
As disclosed in Japanese Patent Application Laid-Open No. 4-84580, a small-diameter portion in which the end of a covered lead wire is integrally molded with rubber or an elastomer, and a core wire protruding from the covering of the covered lead wire protrudes from the molded body. The molded body is formed by holding the air permeability to the core wire portion at the protruding portion and molding the tip of the small-diameter protruding portion of the molded body into the connector housing.

[0006]

By the way, in the electric wiring as described above, the first electric component 1 generates heat (especially lamps) during use or is exposed to a high temperature (especially an oxygen sensor or the like). If it is left to stand for a long time and cooled to a temperature substantially equal to the outside air temperature, it expands and contracts due to cold heat, and a negative pressure is generated inside the first electrical component 1. Then, the negative pressure generated inside the first electrical component 1 passes through the covered lead wire 1a from the first electrical component 1 and reaches the inside of the waterproof connector 9b. Since the waterproof connectors 9a and 9b are waterproof and have internal ventilation as described above, the negative pressure is transmitted from the inside of the waterproof connector 9b to the inside of the waterproof connector 9a. It reaches the branch 7 through the inside.

Here, an adhesive tape or the like is wound around the branch portion 7 and treated, and in most cases, sufficient waterproofing treatment such as winding a butyl rubber tape is not performed. For this reason, when the branch portion 7 is wet, water is sucked by the negative pressure, and water infiltrates into the waterproof connectors 9a and 9b, thereby causing electric corrosion or electrical damage at the waterproof connectors 9a and 9b. There is a risk of causing trouble.

On the other hand, if the waterproofing at the branching portion 7 is to be ensured by winding a butyl rubber tape or the like, the work is not easy. Must be subjected to waterproofing work, which leads to deterioration of workability and disadvantage in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is an electric machine capable of reliably preventing water from penetrating into electric wiring by simple and easy processing, and preventing occurrence of electric corrosion and electric trouble. It is intended to provide a waterproof device for wiring.

[0010]

In order to achieve the above object, a waterproof device for electric wiring according to the invention of claim 1 is provided.
The first electrical component and the second electrical component are connected via a waterproof connector, and a branch portion that branches to another electrical component is formed between the waterproof connector and the second electrical component. A waterproofing device for electric wiring, comprising: a first waterproof connector that can be fitted to a first electrical component-side connector of the waterproof connector; and a second waterproof electrical connector that can be fitted to a second electrical component-side connector of the waterproof connector. A second waterproof connector, the first waterproof connector and the second waterproof connector at both ends, and a portion between them is bent upward to expose a core wire having no coating in a part of the way. A covered lead wire having a portion formed therein, and a water-resistant insulating tube that bends with the covered lead wire and covers the exposed portion of the covered lead wire.

In the waterproofing device for electric wiring according to the first aspect of the present invention, for example, if a negative pressure is generated in the first electrical component, the negative pressure is transmitted from the first electrical component to the waterproof connector. It is transmitted to the first electrical component-side connector, and further transmitted from the first waterproof connector fitted to the first electrical component-side connector into the coated lead wire bent upward to expose the uncoated core wire. Escaped from the department. Therefore, a negative pressure does not act on a branch portion between the waterproof connector and the second electrical component to another electrical component, and even if the branch portion is wet, water is sucked from the branch portion. Is prevented from occurring. Further, the exposed portion of the core wire is covered with a water-resistant insulating tube bent together with the covered lead wire, so that the exposed portion is protected from being wet. Also, even if water enters between the coated lead wire and the insulating tube, the coated lead wire and the insulating tube are bent upward between the connectors, so that the water is easily exhausted, and the exposed portion is exposed. Water can be prevented from entering.

According to a second aspect of the present invention, there is provided the waterproofing device for electric wiring according to the first aspect of the present invention, wherein the covered lead wire is plural, and the exposed portion of each covered lead wire is formed by The insulation between the lead wires is ensured by forming the coated lead wires at different positions having electrical insulation properties.

Further, according to a third aspect of the present invention, in the waterproofing device for electric wiring according to the first or second aspect, the insulating tube is formed of a member having heat resistance. Therefore, even if the first electrical component generates high heat or is used under high temperature, the intrusion of water into the electrical wiring is reliably prevented by simple and easy processing, Prevent the occurrence of electrical trouble.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to an embodiment of the present invention. FIG. 1 is an explanatory view of connection when each electric component is connected by wiring, FIG. 2 is an external perspective view of a waterproof device, and FIG. 3 is waterproof in an attached state. FIG. 4 is an external perspective view of the apparatus, and FIG. 4 is an explanatory view of an exposed portion of a covered lead wire. In this embodiment, a waterproof device is attached to the conventional example shown in FIG. 5, and the same reference numerals indicate the same parts as in FIG.

That is, as shown in FIG. 1, the first end of the coated lead wire 1a extending from the first
The waterproof device 10 is mounted between the waterproof connector 9b, which is the electrical component side connector, and the waterproof connector 9a, which is the second electrical component side connector at the end of the covered lead wire 8a of the wire harness 8.

As shown in FIGS. 2 and 3, the waterproof device 10 includes a first waterproof connector 10a which can be fitted to the waterproof connector 9b while maintaining the waterproof property, and a waterproof connector 9b.
a second waterproof connector 1 which can be fitted while maintaining waterproofness
0b, a first waterproof connector 10a and a second waterproof connector 10b at both ends, and a waterproof connector 10a,
10b (2 poles in the present embodiment) and the same number (2 poles)
A coated lead wire 10c composed of the coated lead wire of the present invention and a water-resistant and heat-resistant insulating tube 10d that covers the outside of the coated lead wire 10c.

As shown in FIG. 4, the exposed portions 10e and 10f of the cored wires 10c and 10f, each of which has an uncoated core, are electrically insulated from each other. Formed at different positions from each other
The exposed lead wires 10 cover the exposed portions 10e and 10f.
An insulating tube 10d that is bent upward in an inverted U-shape along with c is provided.

The insulating tube 10d is formed of a material having heat resistance in addition to water resistance, and the first electrical component 1 is heated to a high temperature such as a lamp or a heater or to a high temperature such as an oxygen sensor. Even those who are exposed are fully adaptable.

In the present embodiment, the branch portion 7 of the wire harness 8 is merely wrapped with an adhesive tape, and is not subjected to a special waterproof treatment.

When the waterproofing device 10 is mounted, the waterproofing connector 9b and the first waterproofing connector 10a are simply provided.
And the waterproof connector 9a and the second waterproof connector 10b are fitted to each other, and only the bent portion of the covered lead wire 10c is directed upward, so that the work is easy and the workability is good. or,
When the waterproof device 10 is removed, the first and second waterproof connectors 10a and 10b are connected to the waterproof connector 9 respectively.
It can be done by pulling out from b, 9a, and it is easy and workability is good. Further, the waterproof device 10 can be reused.

Next, an operation when a negative pressure is generated in the first electrical component 1 with the waterproof device 10 attached will be described. When a negative pressure is generated in the first electrical component 1 due to a cooling action or the like, the negative pressure passes through the coated lead wire 1a,
It reaches the inside of the waterproof connector 9b. Then, the first waterproof connector 10 of the waterproof device 10 is opened from within the waterproof connector 9b.
a, and reach the exposed portions 10e and 10f through the inside of the covered lead wire 10c, respectively, and are escaped to the outside.

Therefore, no negative pressure is applied to the branch portion 7 of the wire harness 8 and no special waterproof treatment is applied to the branch portion 7.
The suction of water from is prevented beforehand. As a result, intrusion of water into the electric wiring is reliably prevented, and electric corrosion and electric trouble can be prevented beforehand.

The exposed portion 10 of the covered lead wire 10c
Since e and 10f are covered with the insulating tube 10d, they are protected from being wet. Moreover, even if water enters the insulating tube 10d, the coated lead wire 10c and the insulating tube 10d are bent upward in an inverted U-shape, so that water does not reach the exposed portions 10e and 10f. Is derived.

[0024]

As described above, according to the waterproofing device for electric wiring according to the first aspect of the present invention, the exposed portion of the uncoated core wire is formed in a part of the covered lead wire, and the exposed portion is made waterproof. First electrical component side connector that connects the first electrical component and the second electrical component by connecting the first and second waterproof connectors provided at both ends of the coated lead wire with an insulating tube having a conductive property And the second electrical component side connector, even if a negative pressure is generated in the first electrical component due to expansion and contraction due to cold heat, this negative pressure is applied to the uncovered core wire formed on the coated lead wire. The negative pressure does not act on the branch to the other electrical component formed between the second electrical component side connector and the second electrical component, and this branch is covered. Even if water is applied, prevent the suction of water into the wiring from the branch due to negative pressure. It is possible. Therefore, it is possible to reliably prevent water from entering the electric wiring from the branch portion due to negative pressure without applying a special waterproof treatment to the branch portion, and to prevent electric corrosion and electrical troubles. it can.

Further, in this waterproofing device, the exposed portion of the uncoated core formed on a part of the coated lead is protected from water by an insulating tube, and furthermore, the coated lead and the coated lead are formed. Since the water-resistant insulating tube that covers the exposed part is bent upward between the connectors, even if water enters between the insulating tube and the coated lead wire, it is easily discharged and the electric wiring from the exposed part Water is prevented from entering.

Further, since the waterproofing device can be formed separately, the first connector is fitted to the first electrical component side connector and the second electrical component side connector is fitted to the second electrical component side connector.
By simply fitting the connector and turning the bent portion of the covered lead wire upward, it is possible to easily and easily attach the connector, thereby improving workability and reducing cost.

Further, it can be easily mounted on conventional electric wiring.

According to the second aspect of the present invention, when there are a plurality of covered lead wires, the exposed portions are formed at mutually different positions having electrical insulation for each of the covered lead wires. In addition to the effects of the described invention, there is an effect that the insulation between the lead wires can be reliably ensured.

According to the third aspect of the present invention, since the insulating tube is formed of a member having heat resistance, the first electrical component generates high heat in addition to the effect of the first or second aspect. It is possible to cope with what is used or what is used under high temperature, and it is possible to prevent the intrusion of water into the electric wiring by simple and easy processing, and to prevent the electric corrosion and electric This has the effect of preventing mechanical trouble beforehand.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of connection in a case where each electric component is connected by wiring;

FIG. 2 is an external perspective view of the waterproof device.

FIG. 3 is an external perspective view of the waterproof device in an attached state.

FIG. 4 is an explanatory view of an exposed portion of a covered lead wire.

FIG. 5 shows a conventional example, and is an explanatory diagram of wiring in a case where each electrical component is connected by wiring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st electrical component 2 2nd electrical component 3 Other electrical components 7 Branch part 8 Wire harness 8a, 8b, 8c Coated lead wire 9a 2nd electrical component side connector (waterproof type connector) 9b 1st electrical component Side connector (waterproof connector) 10 Waterproof device 10a First waterproof connector 10b Second waterproof connector 10c Insulated lead wire 10d Insulated tube 10e, 10f Exposed portion

Claims (3)

[Claims] 1. A first electrical component and a second electrical component are connected via a waterproof connector, and a branch is made to another electrical component between the waterproof connector and the second electrical component. What is claimed is: 1. A waterproofing device for electric wiring having a branch portion, comprising: a first waterproof connector that can be fitted to a first electrical component connector of the waterproof connector; and a second electrical component side of the waterproof connector. A second waterproof connector that can be fitted to the connector, the first waterproof connector and the second waterproof connector at both ends, and a portion between them is bent upward to cover a part of the way; A covered lead wire having an exposed portion of a core wire having no wire, and a water-resistant insulating tube that bends with the covered lead wire and covers the exposed portion of the covered lead wire. Waterproof device. 2. The coating lead wire according to claim 1, wherein a plurality of the coating lead wires are provided, and exposed portions of the respective coating lead wires are formed at mutually different positions having electrical insulation for each of the coating lead wires. Electrical wiring waterproof device. 3. The insulating tube according to claim 1, wherein the insulating tube is formed of a member having heat resistance.
The waterproofing device of the described electric wiring.