JP2000197239A - Electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the penetration of moisture into the body of an electrical connection body by improving waterproofing property between the body and a lead wire bundle, without deteriorating assembling workability of a relay holder with the body. SOLUTION: In an electrical connection body having an electrical connection box body 11 provided with a relay holder 12 and a lead wire bundle leading-out port 18, which is combined with the holder 12 and through which lead wires connected to relays are led out in a bundle, a sidewall 17 forming the lead-out port is constructed into double wall by providing an inside wall 20 inside the sidewall 17 with a clearance 19 in between, and after the lead wire bundle is passed through the port 18, a waterproof material is put in the clearance 19 between the sidewall 17 and inside wall 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box installed in, for example, an automobile, and more particularly to a structure for improving waterproofness between the electric junction box and a harness drawn out of the electric junction box. The present invention relates to a structure of an electric junction box.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional electrical junction box structure used for accommodating and holding a large number of relays installed in an automobile, for example. A specific configuration thereof is an electric connection box main body 2 integrally formed with a mounting bracket 1 which is mounted on an appropriate mounting body (not shown) such as a vehicle body.
And a relay holder 3 fitted on the electric connection box main body 2 and holding a large number of relays (not shown), and a relay holder 3 fitted and held on the electric connection box main body 2. It consists of a front cover 4 to be attached,
When assembling the electrical junction box, first, lead wires are connected, and a number of relays prepared in advance are fitted and held in the relay holder 3. Next, the relay holder 3 is positioned on the electric connection box main body 2 and the claw pieces 5 provided on the electric connection box main body 2 are arranged.
Of the relay holder 3 and the electrical junction box main body 2
And At this time, the lead wires connected to the respective relays are bundled and drawn out of the electrical junction box main body 2 through the lead wire outlet opening 7 provided in the electrical junction box main body 2.

Next, the front cover 4 is put on the relay holder 3 from above, and the locking claws 8 provided on the side surface of the front cover 4 are engaged with the locking pieces 9 provided on the side surface of the relay holder 3. Relay holder 3 and electric junction box main body 2 for fitting and holding a large number of relays
And the three members of the front cover 4 are integrated to form an electric connection box.

[0004]

In the conventional electric junction box constructed as described above, a bundle of lead wires connected to each relay is drawn out from the lead wire lead-out opening 7. However, since no waterproof means is provided between the edge of the lead wire outlet opening 7 and the lead wire bundle, the waterproofness of the lead wire outlet portion is poor. Water easily penetrates into the electric connection box main body from the gap between them and lacks waterproofness.

The present invention has been made in view of such a drawback. In particular, the present invention has been made in consideration of the workability of assembling the relay holder and the electric junction box main body without impairing the workability between the electric junction box main body and the lead wire bundle. It is an object of the present invention to provide an electric junction box which can enhance the waterproofness of the electric junction box and prevent the intrusion of moisture into the electric junction box body.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a relay holder for fitting and holding a plurality of relays each having a lead wire connected thereto, and the relay holder. And an electric junction box body provided with a lead wire bundle outlet for bundling lead wires connected to the respective relays and drawing out the outside, wherein a lead wire bundle provided on the electric junction box body is provided. Inside the side wall forming the outlet, an inner wall is provided with a gap therebetween to form a double wall, and after the lead wire bundle is inserted through the lead wire bundle outlet, the inside of the gap formed between the side wall and the inner wall is formed. An electrical junction box provided with a waterproof material filled with a urethane foam resin liquid.

According to a second aspect of the present invention, there is provided an electric connection box in which a mat body which is a foamed elastic molded body positioned so as to close the lead wire bundle outlet is inserted into the gap according to the first aspect. Features.

[0008]

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

1 to 6, reference numeral 11 denotes an electric connection box main body which is a component of the electric connection box 10, reference numeral 12 denotes a relay holder thereof, and reference numeral 13 denotes a front cover. The electric connection box main body 11 is formed integrally with a mounting bracket 15 attached to an appropriate mounting body (not shown) such as a vehicle body on the back surface of the relay holder receiving portion 14 having an upper surface opening for receiving the relay holder 12. The relay holder receiving part 14
Are formed with a plurality of locking claw pieces 16 on the front surface. On one side wall 17 of the relay holder receiving portion 14, a lead wire outlet 18 cut out in a U-shape is formed. Further, the inner wall 2 is located inside the side wall 17 with a gap 19 therebetween.
0 is formed, and a lead bundle guide groove 21 corresponding to the lead bundle outlet 18 is also formed on the inner wall 20.

The structure of the relay holder 12 is substantially the same as that shown in the conventional example, and a plurality of relay accommodating portions 22 for fitting and holding a plurality of relays (not shown) are formed.
Further, a locking step portion 23 for locking the above-mentioned locking claw piece 16 is formed on the front surface thereof. Further, locking pieces 24 for locking the front cover 13 are protruded from both sides of the relay holder 12.

The front cover 13 is a cover which is put on the relay holder 12. Both side walls of the front cover 13 are locked by the locking pieces 24, and the relay holder of the front cover 13 is provided. A locking claw 25 for maintaining the attachment on the base 12 is integrally formed.

The above is the configuration of the present embodiment. Next, a procedure for assembling an electric junction box using the above-mentioned components will be described. First, a plurality of relays connected to lead wires and prepared in advance are described. Each of the relay holders 12 (not shown) is fitted and held in each of the relay accommodating portions 22 of the relay holder 12, and then the relay holder 12 is connected to the electric connection box main body 1.
1 and the locking claw 16 provided on the front surface of the electric connection box main body 11 with the relay holder 1.
2 by being locked to the locking step 23 provided on the front face of
The relay holder 12 and the electric connection box main body 11 are connected. At this time, the lead wires connected to the respective relays (not shown) are bundled to form a lead wire bundle 26, and the electric wires are passed through the lead wire bundle guiding groove 21 and the lead wire bundle outlet 18 formed in the electric connection box main body 11. It is pulled out of the connection box body 11.

Next, the gap 19 formed between the inner wall 20 and the side wall 17 is filled with a waterproof material 27 made of, for example, urethane foam resin liquid, and the periphery of the lead wire bundle 26 is made of urethane foam resin liquid or the like. We attach sponge-like waterproofing material. Thereafter, the front cover 13 is put on the relay holder 12 from above.
The electrical connection box is configured by engaging the locking claw 25 formed on the side surface of the relay boulder with the locking piece 24 provided on the side surface of the relay boulder 12.

In the electric junction box constructed as described above, a large number of lead wires connected to each relay become a lead wire bundle 26 and are provided on the inner wall 20 with the lead wire guide groove 21 and the side wall 17. Is drawn out to the outside through a lead wire bundle outlet 18 provided at the bottom.

The peripheral surface of the lead wire bundle 26 drawn out of the electrical junction box is waterproofly sealed by the waterproof material 27 filled in the gap 19 between the side wall 17 and the inner wall 20. As shown in FIG. 6, the waterproof material 27 filled and solidified between the inner surface of the gap 20 and the lead wire bundle is pressed by the lower edge of the relay holder 12. It is pressed against the peripheral surface in a water-tight manner, so that moisture is
6 can be effectively prevented from entering the inside of the electrical junction box 10 and an electrical junction box having excellent waterproofness can be provided.

In the above embodiment, the lead bundle 26 is inserted into the lead bundle outlet 18 and the lead bundle guide groove 21 as a waterproof means between the lead bundle outlet 18 and the lead bundle guide groove 21 and the lead bundle 26. After the passage, the waterproof material 27 is filled in the gap 19, but is not limited to this, and is formed to have a size that is tightly fitted in the gap 19, for example, as shown in FIG. Further, a sponge-like mat body 28 in which split grooves 29 for holding the lead wire bundle 26 are formed in advance is prepared.
8 is attached to the lead bundle 26, the mat body 28 is fitted into the gap 19, and the lead bundle 2 is
6 is passed through the lead wire outlet 18 and the lead wire guide groove 21, and then the relay holder 12 is mounted on the electric connection box main body 11, thereby forming the relay holder 1.
2 acts on the mat body 28, and the mat body 2
8 ensures that the lead-out portion of the lead wire bundle 26 is waterproof.

[0017]

As described above, according to the electrical junction box of the present invention, a double wall is formed by the side wall 17 and the inner wall 20 at the lead wire bundle lead-out portion, and the gap formed between the double walls is formed. In FIG. 19, sponge-like waterproof members 27 and 28 which fill the gap between the peripheral surface of the lead wire bundle drawn through the double wall and out of the electric junction box and the double wall are water-tightly positioned. Therefore, it is possible to effectively prevent moisture from transmitting from the outside of the electric connection box through the lead wire bundle 26 and entering the electric connection box.

Further, the waterproof material 2 located in the gap 19
The wires 7 and 28 can be provided by a simple operation of filling or fitting into the gap 19 formed in the electrical junction box main body 11 when the lead wire bundle 26 is pulled out from the electrical junction box main body 11. An electric junction box having excellent waterproofness can be configured without impairing the box assembly workability.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an electric junction box according to the present invention.

FIG. 2 is a perspective view showing an embodiment of an electric junction box according to the present invention.

FIG. 3 is a front view showing an embodiment of an electric junction box according to the present invention.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a plan view showing an embodiment of an electric junction box according to the present invention.

FIG. 6 is a sectional view taken along line BB in FIG. 5;

FIG. 7 is an exploded perspective view showing another embodiment of the present invention.

FIG. 8 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Electric junction box 11 ... Electric junction box main body 12 ... Relay holder 13 ... Front cover 14 ... Relay holder receiving part 15 ... Mounting bracket 16 ... Locking claw piece 17 ... Side wall 18 ... Lead wire bundle outlet 19 ... Gap 20 ... Inner wall DESCRIPTION OF SYMBOLS 21 ... Lead wire bundle guide groove 22 ... Relay accommodating part 23 ... Locking step part 24 ... Locking piece 25 ... Locking claw 26 ... Lead wire bundle 27 ... Waterproof material 28 ... Mat body

Claims (2)

[Claims] 1. A relay holder (12) for fitting and holding a plurality of relays each having a lead wire connected thereto,
An electric junction box main body (1) which is combined with the relay holder (12) and provided with a lead wire bundle outlet (18) for bundling lead wires connected to the respective relays and drawing out the outside.
In the electric connection box (10) having (1), the lead wire bundle outlet (1) provided in the electric connection box main body (11) is provided.
An inner wall (20) is provided inside a side wall (17) forming 8) with a gap (19) therebetween to form a double wall, and the lead wire bundle (26) is inserted through the lead wire outlet (18). After that, a waterproof material (27) filled with a urethane foam resin liquid is provided in a gap (19) formed between the side wall (17) and the inner wall (20). Connection box. 2. A mat body (28), which is a foamed elastic molded body positioned so as to close the lead wire bundle outlet (18), into the gap (19) according to claim 1. An electrical junction box.