JP3311657B2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box such as a relay box or a fuse box which is mounted on a vehicle or the like with a junction box main body and a sub junction box main body covered with a waterproof cover.

[0002]

2. Description of the Related Art A relay box 1 shown in FIG. 4 is known as this type of electric connection box. The relay box 1 includes a main relay box (junction box main body) 2 having a concave mounting portion 3, a sub relay box (sub junction box main body) 4 mounted on the mounting portion 3 of the main relay box 2, A waterproof cover 7 covering only the main relay box 2 and a waterproof cover 8 covering only the sub relay box 4
It is composed of

[0003] On the upper surface of the main relay box 2, a plurality of relay mounting housings 2a are formed. A concave mounting portion 3 is provided in the upper right corner of the main relay box 2 in the drawing, and a pair of mounting brackets 5A for fixing the vehicle are provided in the upper left and lower right corners in the drawing.
5B is protruded.

On the upper surface of the sub-relay box 4, a plurality of relay mounting housings 4a are formed. Further, wire harnesses 6A and 6B are connected to the main relay box 2 and the sub relay box 4, respectively.
These main relay box 2 and sub relay box 4
Are separately delivered to, for example, a vehicle assembly line. In this vehicle assembly line, the relay box 1 is assembled by covering the boxes 2 and 4 with the waterproof covers 7 and 8, respectively, with the sub-relay box 4 mounted on the mounting section 3 of the main relay box 2. The vehicle is fixed to a predetermined position of the vehicle via the mounting brackets 5A and 5B.

However, in the conventional relay box 1, since the waterproof covers 7 and 8 are individually covered by the boxes 2 and 4, respectively, the number of parts is increased and the cost is increased. To cope with this, a relay box 1 'shown in FIG. 5 was developed. In this relay box 1 ′, a main relay box (junction box main body) 2, a sub relay box (sub junction box main body) 4 mounted on the mounting portion 3 of the main relay box 2, It comprises a waterproof cover 9 that covers the relay box 4.

Then, for example, in a vehicle assembly line,
Main relay box 2 fitted with waterproof cover 9 in advance
And the sub-relay box 4 are delivered separately, and the waterproof cover 9 is provided from the main relay box 2 on the vehicle assembly line.
, The sub relay box 4 is mounted on the mounting portion 3 of the main relay box 2, and then the main relay box 2 and the sub relay box 4 are covered with a waterproof cover 9, whereby the relay box 1 'is assembled. It has become.

[0007] A similar technique relating to the electric junction box is as follows.
It is disclosed in Japanese Utility Model Laid-Open No. 1-69315.

[0008]

However, when the conventional relay box 1 'is delivered to a vehicle assembly line, the waterproof cover 9 is attached to the main relay box 2 side and the main relay box 2 Since the relay box 4 is delivered separately from the relay box 4, a gap for accommodating the sub-relay box 4 is formed in the waterproof cover 9 attached to the main relay box 2, and foreign matters such as sand and dust are formed from the gap. There was a risk of intrusion. In addition, the waterproof cover 9 for storing the sub-relay box 4 is provided.
Since the overall shape of the cover becomes large, deformation such as warpage is likely to occur in the waterproof cover 9, and when the deformation is large, there is a concern that the work of covering the main relay box 2 and the sub-relay box 4 with the waterproof cover 9 may be difficult. . Furthermore, since the control unit 2b and the like are disposed on the upper surface side of the main relay box 2, entry of foreign matters such as sand and dust may cause a failure or the like.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an electric junction box capable of reliably preventing foreign matter such as sand and dust from entering and deformation such as warpage of a waterproof cover. The purpose is to provide.

[0010]

According to the first aspect of the present invention, there is provided a connection box main body having a concave mounting portion, a sub connection box main body mounted on the mounting portion of the connection box main body, and a connection box main body and a sub connection box main body. Ri consists of a waterproof cover for covering the sub-junction box body, the proof
The junction box main body and the sub junction box main body inside the water cover
In the electrical connection box in which a partition wall that partitions the bets, the contact
Attach the mounting portion to one corner of the connecting box body.
Is formed in a concave shape so that it is notched, and
Project the partition wall of the waterproof cover in the front-rear direction and the left-right direction.
It is characterized by having been established .

In this electrical junction box, when the waterproof cover is fitted to the junction box body before the sub-junction box body is attached to the mounting portion of the junction box body, the partition box separates the junction box body and the waterproof cover from each other. , And the intrusion of foreign matter such as sand and dust into the connection box body is reliably prevented. In particular, with the connection box body
The partition wall that separates from the sub junction box body
Deformation such as warping in the front-rear direction and left-right direction is reliably prevented.
You.

[0012]

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an electric connection box according to an embodiment of the present invention before being assembled, FIG. 2 is a plan view of a waterproof cover used in the electric connection box, and FIG. It is sectional drawing which follows the A line.

As shown in FIG. 1, a relay box 10 as an electric connection box is made of a synthetic resin and has a flat L-shaped main relay box (junction box main body) 20 having a concave mounting portion 21, Mounting part 2 of relay box 20
A sub-relay box (sub-connection box body) 30 made of synthetic resin and mounted on the main relay box 20;
0 and a box-shaped waterproof cover 40 made of synthetic resin. The main relay box 20 and the sub-relay box 30 to which the waterproof cover 40 is fitted in advance are separately delivered to, for example, a vehicle assembly line, and are assembled on the vehicle assembly line.

As shown in FIG. 1, the mounting portion 21 is formed in a flat rectangular concave shape from the center of the rear portion of the main relay box 20 to the upper right corner in the figure. That is, the mounting portion 21 is formed in a concave shape so that a corner portion on the upper right side in the figure as one corner of the main relay box 20 is cut out into a flat rectangular shape. A mounting bracket 22 is formed integrally and obliquely above the upper corner of the main relay box 20 on the right end side of the mounting portion 21. A reinforcing rib 22a is integrally formed below the left side surface of the mounting bracket 22. Furthermore, the main relay box 20
Another mounting bracket 23 is integrally formed at the lower left corner in FIG. A reinforcing rib 23a is also integrally formed on one side surface of the mounting bracket 23.

A plurality of relay mounting housings 24 are respectively formed in the center of the upper surface 20a of the main relay box 20, and a plurality of terminal fitting type fusible links are mounted on the upper center and the left side of the upper surface 20a. Housings 25 are respectively formed. A screw-type fusible link mounting housing 26 is formed on the upper left side of the upper surface 20a of the main relay box 20 in the drawing.
Each of the terminal fitting type fusible link mounting housings 25 and each of the screw-type fusible link mounting housings 26 are connected by a pair of bus bars 27A and 27B. Furthermore, the upper surface 2 of the main relay box 20
On the right side of Oa, a control unit 28 is formed. Note that a wire harness 29 is connected to the mounting bracket 23 on the left side surface of the main relay box 20.

The upper surface 30 of the sub-relay box 30
In a, a plurality of relay mounting housings 31 are respectively formed. A cut-out portion 32 for accommodating the reinforcing rib 22a is formed in a portion of the mounting bracket 22 on the bottom side of the sub-relay box 30 facing the reinforcing rib 22a. A wire harness 33 is connected to the left side of the sub-relay box 30 in the drawing.

As shown in FIG. 1 to FIG.
Is formed in a box shape with a lower surface side opened by a ceiling wall 41, front and rear side walls 42a and 42b, and left and right side walls 43a and 43b, and these ceiling wall 41, rear side wall 42b and right side wall 43b A rib (partition wall) 44 for partitioning the main relay box 20 and the sub-relay box 30 is integrally formed on the inner side. The ribs 44 are formed in a plane L shape by a vertical wall portion 44a extending in the front-rear direction and a horizontal wall portion 44b extending in the left-right direction along the mounting portion 21 of the upper right corner of the main relay box 20 in the drawing. Thus, the main relay box 20 and the sub-relay box 30 are partitioned with almost no gap.

According to the relay box 10 of the embodiment described above, the main relay box 20 and the sub-relay box 30 with the waterproof cover 40 fitted in advance are separately delivered to, for example, a vehicle assembly line, and assembled in the vehicle assembly line. However, at the time of delivery, that is, when the waterproof cover 40 is fitted to the main relay box 20 before the sub-relay box 30 is mounted to the mounting portion 21 of the main relay box 20, the waterproof cover 40 The main relay box 20 is formed by the inner flat L-shaped ribs 44.
There is no gap between the cover and the rib 44 of the waterproof cover 40, and the rib 44 can reliably prevent foreign matter such as sand and dust from entering the main relay box 20 side.

The ribs 44 inside the waterproof cover 40 that separates the main relay box 20 and the sub-relay box 30 are provided along the mounting portion 21 at one corner (upper right corner in the figure) of the main relay box 20. As described above, by integrally forming a flat L-shape in the front-rear direction and the left-right direction, deformation of the waterproof cover 40 such as warpage in the front-rear direction and the left-right direction can be reliably prevented, and the strength of the waterproof cover 40 is improved. be able to. This means that the waterproof cover 4
This is particularly effective when 0 is large or thin, and it is possible to reliably prevent a failure or the like of the control unit 28 of the main relay box 20 due to foreign matters such as sand and dust. Further, the waterproof cover 40 has a large overall shape because the sub-relay box 30 is housed therein. Can be easily covered with the waterproof cover 40.

For example, when assembling the main relay box 20 and the sub-relay box 30 fitted with the separately supplied waterproof covers 40 on the vehicle assembly line, the main relay box 20 uses the waterproof cover 40
Then, the cassette type sub-relay box 30 is mounted on the mounting portion 21 of the main relay box 20. After this, the main relay box 20 and the sub relay box 3
By fitting and covering the relay box 10 with the waterproof cover 40, the relay box 10 excellent in dustproof property, waterproof property and the like is assembled. Relay box 1 assembled in this way
Reference numeral 0 is fixed to a predetermined position of the vehicle via the mounting brackets 22 and 23 for fixing the vehicle.

Although the relay box has been described as an electric connection box according to the above-described embodiment, it is needless to say that the embodiment can be applied to other electric connection boxes such as a fuse box and a junction box.

[0025]

As described above, according to the first aspect of the present invention, since the partition wall for separating the connection box main body and the sub connection box main body is provided inside the waterproof cover, the mounting portion of the connection box main body is provided. At the time of covering the junction box body with the waterproof cover before the sub-junction box body is attached to the partition box, the partition wall can eliminate the gap between the junction box body and the waterproof cover,
Intrusion of foreign matter such as sand and dust into the connection box body can be reliably prevented. In particular, the junction box body and the sub junction box body
Connect the partition wall of the waterproof cover to one of the joint boxes
In the front-rear direction and the left-right direction along the mounting
With the protrusion, the front and rear and left and right sides of the waterproof cover
That deformation such as warpage can be reliably prevented.
In addition, the strength of the waterproof cover can be improved.

[0026]

[Brief description of the drawings]

FIG. 1 is a plan view showing a state before an electric connection box according to an embodiment of the present invention is assembled.

FIG. 2 is a plan view of a waterproof cover used for the electric connection box.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a plan view showing a state before assembling an electric junction box of a conventional example.

FIG. 5 is a plan view showing a state before assembling another conventional electric connection box.

[Explanation of symbols]

 Reference Signs List 10 relay box (electric junction box) 20 main relay box (junction box main body) 21 mounting part 30 sub relay box (sub junction box main body) 40 waterproof cover 44 rib (partition wall)

Claims (1)

(57) [Claims] 1. A connection box main body having a concave mounting portion, a sub connection box main body mounted on the mounting portion of the connection box main body,
Ri consists a waterproof cover for covering the connection box body and the sub-connection box body, and the connection box body on the inside of the waterproof cover
In an electric connection box provided with a partition wall for partitioning from the sub connection box main body, the mounting portion is provided on one corner side of the connection box main body.
The recessed part is formed so that the corner part is notched.
So that the partition wall of the waterproof cover is
An electrical junction box protruding in the direction .