JPH11113138A - Electrical junction box - Google Patents

Abstract

(57) [Summary] An electric junction box which can increase the effective space of a sub-junction box main body and can easily and securely attach the sub-junction box main body to the junction box main body without rattling. provide. SOLUTION: An electric box comprising a connection box main body 20 having a concave mounting portion 21 and a mounting bracket 22 protruding from the mounting portion 21, and a sub connection box main body 30 mounted on the mounting portion 21 of the connection box main body 20. In the connection box 10, a reinforcing rib 23 is provided on the mounting bracket 22, and a reinforcing rib 23 is provided on the bottom surface side of the sub-connection box main body 30 facing the reinforcing rib 23.
A notch 31 having a notch bottom surface 32b contacting the
The cut-out bottom surface 32b and the cut-out side surface 33a of the cut-out portion 31 can freely contact the upper surface 23a of the reinforcing rib 23 and one side surface 22b of the mounting bracket 22. In addition, a low-height electric component 35 is provided at a portion of the sub-junction box main body 30 facing the notch 31.
Mounted freely.

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 having a mounting bracket to be mounted on a vehicle or the like.

[0002]

2. Description of the Related Art As this type of electric connection box, a relay box 1 shown in FIG. 5 is known. The relay box 1 includes a main relay box (junction box body) 2 having a concave mounting portion 3 and a mounting bracket 4 protruding from the mounting portion 3, and a sub-mount mounted on the mounting portion 3 of the main relay box 2. And a relay box (sub-junction box main body) 5.

[0003] On the upper surface of the main relay box 2, a plurality of relay mounting housings 2a are formed. The mounting bracket 4 projects obliquely upward from the upper corner of the main relay box 2 at the end of the mounting portion 3 and is provided at the lower corner of the main relay box 2 on the wire harness connection side. Has another mounting bracket 6 protruding therefrom. Reinforcing ribs 4a, 6a are formed integrally on one side of the mounting brackets 4, 6 for fixing the vehicle, respectively. Furthermore, a pair of lock engagement portions 7, 7
Is provided.

On the upper surface of the sub-relay box 5, a plurality of relay mounting housings 5a are formed. Further, a pair of lock engaging portions 8, 8 are provided at positions of the mounting portion 3 of the sub-relay box 5 facing the pair of lock engaging portions 7, 7. Wire harnesses 9A and 9B are connected to the main relay box 2 and the sub relay box 5, respectively. The main relay box 2 and the sub relay box 5 are separately delivered to, for example, a vehicle assembly line. Then, in this vehicle assembly line, the sub-relay box 5 is mounted on the mounting portion 3 of the main relay box 2 via the lock engaging portions 7 and the lock locking portions 8, and the relay box 1 is assembled. It is fixed to a predetermined position of the vehicle via the wheels 4 and 6.

[0005] A similar technique relating to the electric junction box is as follows.
It is disclosed in Japanese Utility Model Laid-Open No. 6-48148.

[0006]

However, in the conventional relay box 1, one of the mounting brackets 4 projects obliquely from the end of the mounting portion 3 at the upper corner of the main relay box 2, and is provided with reinforcing ribs 4a. Since the damage is prevented by compensating for the insufficient strength, the corner portion of the sub-relay box 5 on the side of the mounting bracket 4 is largely cut off as shown by the symbol K in FIG. Has become smaller. In addition, since the two relay boxes 2 and 5 are assembled based on the lock engagement portion 7 of the main relay box 2 and the lock engagement portion 8 of the sub relay box 5, the assembly work efficiency is low.

Accordingly, the present invention has been made to solve the above-mentioned problems, and can increase the effective space of the sub-junction box main body as much as possible, and connect the sub-junction box main body to the junction box main body. An object of the present invention is to provide an electric connection box that can be easily and securely mounted without rattling.

[0008]

According to a first aspect of the present invention, there is provided a connection box body having a concave mounting portion and a mounting bracket projecting from the mounting portion, and a sub-connection mounted on the mounting portion of the connection box body. In the electric junction box including the box main body, a reinforcing rib is provided on the mounting bracket, and a notch having a cutout bottom surface abutting on the reinforcing rib is provided on a bottom side of the sub-connection box main body facing the reinforcing rib. It is characterized by having.

In this electric junction box, the mounting bracket is reinforced by the reinforcing ribs to prevent the mounting bracket from being damaged.
It is also reinforced for mounting and holding the sub-junction box body to the junction box body. In addition, since the notch is provided in a portion of the mounting bracket on the bottom surface side of the sub-junction box body facing the reinforcing rib, an effective space of the sub-junction box main body is expanded.

According to a second aspect of the present invention, in the electrical junction box according to the first aspect, a low-height electrical component can be freely mounted on a portion of the sub-junction box body facing the notch. Features.

In this electric junction box, the electric parts can be laid out even in the sub-junction box main body where the layout of the electric parts is difficult, and the component mounting property is improved.

According to a third aspect of the present invention, in the electric junction box according to the first aspect, the reinforcing ribs are protruded below one side surface of the mounting bracket in an oblique shape. The cut-out bottom surface and the cut-out side surface of the cut-out portion of the sub-junction box main body can freely contact one side surface of the mounting bracket.

In this electrical junction box, the play of the sub-junction box main body with respect to the mounting portion of the junction box main body is absorbed, and the play in the vertical and horizontal directions when the sub-junction box main body is mounted on the mounting portion of the junction box main body. There is no sticking.

According to a fourth aspect of the present invention, in the electrical junction box according to the first aspect, the positioning rib is provided on the reinforcing rib and the notch bottom surface of the notch portion of the sub-connection box main body is provided. An engaging portion engaged with the locking portion is provided.

In this electrical junction box, the dead space of the sub-junction box main body is effectively used, and the workability of assembling the junction box main body and the sub-junction box main body is improved.

[0016]

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

FIG. 1 is a plan view showing an electric junction box according to an embodiment of the present invention before being assembled, FIG. 2A is a plan view of a sub-junction box body used in the electric junction box, and FIG. () Is a front view of the sub connection box main body.

As shown in FIG. 1, a relay box 10 as an electric connection box has a concave mounting portion 21 and a mounting portion 21.
Main relay box (junction box body) 20 made of synthetic resin and provided with a protruding mounting bracket 22 and having a flat L-shape
A synthetic resin cassette type sub-relay box (sub-connection box main body) 30 mounted on the mounting portion 21 of the main relay box 20, and a main relay box 20 and a sub-relay box 30 which are open on the bottom side. It is made up of a box-shaped waterproof cover 40 made of synthetic resin to cover. 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 part of the main relay box 20 to the upper right corner in the figure.
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 first relay box 20. The base side of the upper surface 22a of the mounting bracket 22 has a substantially triangular shape, and the left side surface (one side surface) 22b is formed obliquely in an inverted letter shape with respect to the right side surface (the other side surface) 22c. The upper surface 2 is located below the left side surface 22b of the oblique shape.
3a, a substantially trapezoidal reinforcing rib 23 is integrally formed so as to protrude in the horizontal direction.
It is thinner than the thickness of 2. Another mounting bracket 24 is integrally formed at the lower left corner of the main relay box 20 in the drawing. This mounting bracket 2
A reinforcement rib 24a in the shape of a triangular plate is also integrally formed on one side surface of the fourth member 4.

The upper surface 2 of the main relay box 20
In the lower right side of FIG.
5 are formed, and a plurality of terminal fitting type fusible link mounting housings 26 are formed on the upper center and left side of the upper surface 20a. Further, a housing 27 for mounting a screw-type fusible link is provided on the upper left side of the upper surface 20a of the main relay box 20 in the figure.
Is formed. Each of these terminal fitting type fusible link mounting housings 26 and each screwing type fusible link mounting housing 27 are formed of a pair of bus bars 28A, 28.
B. In addition, main relay box 2
A wire harness 28C is connected to the mounting bracket 24 on the left side surface of the wire harness 28C.

As shown in FIGS. 1, 2 (a) and 2 (b),
At a position on the bottom surface 30b of the sub-relay box 30 facing the reinforcing ribs 23 of the lower right mounting bracket 22 in the drawing,
A triangular prism stepped notch 31 is formed. This notch 3
1 is a triangular first notch bottom surface 32 a facing the upper surface 22 a of the mounting bracket 22, and an upper surface 2 of the reinforcing rib 23.
3a has a trapezoidal second notched bottom surface 32b with which it abuts. The notch 31 is formed by a first notch side surface 33a with which the oblique left side surface 22b of the mounting bracket 22 contacts.
And a second notched side surface 33b facing the side surface 23b of the reinforcing rib 23.

The upper surface 30 of the sub-relay box 30
In a, a plurality of relay mounting housings 34 are respectively formed. Further, the upper surface 3 of the sub-relay box 30
A part mounting housing 36 for mounting an electric component 35 such as a fuse or a connector, which is lower in height than a relay (not shown) mounted on the relay mounting housing 34, is formed in a portion facing the notch 31 of Oa. is there. A wire harness 38 is connected to the left side of the sub relay box 30 in the drawing.

According to the relay box 10 of the embodiment described above, for example, when the main relay box 20 and the sub-relay box 30 fitted with the waterproof cover 40 separately supplied in the vehicle assembly line are assembled, the main relay box is used. The cassette type sub relay box 30 is mounted on the mounting section 21 of the main relay box 20 by removing the waterproof cover 40 from the main relay box 20. At this time, the first cutout side surface 33a of the cutout portion 31 of the sub-relay box 30 comes into contact with the slanted left side surface 22b of the mounting bracket 22 for fixing the vehicle without looseness in the left-right and front-rear directions. The second cutout bottom surface 32b of the cutout portion 31 of the sub-relay box 30 comes into contact with the upper surface 23a of the reinforcing rib 23 below the left side surface 22b of the bracket 22 and is mounted without play in the vertical direction. As a result, the play of the sub-relay box 30 with respect to the mounting portion 21 of the main relay box 20 can be reliably absorbed.

Further, since the reinforcing ribs 23 are integrally formed below the left side surface 22b of the mounting bracket 22 for fixing the vehicle, the mounting bracket 22 can be reinforced by the reinforcing ribs 23 to prevent the mounting bracket 22 from being damaged. , The reinforcement of the mounting and holding of the sub-relay box 30. Further, the bottom surface 3 of the sub-relay box 30 facing the reinforcing rib 23
The notch 31 is formed only on the side 0b, that is, the bottom surface 30b of the sub-relay box 30 is raised by the thickness of the reinforcing rib 23, so that the upper surface 30a of the sub-relay box 30 is formed.
An effective space for the component layout on the side can be expanded as compared with the conventional case, and electric components 35 such as fuses and connectors, which are lower in height than a not-shown relay, are provided on the upper surface 30a facing the notch 31 of the sub-relay box 30. Can be installed. Therefore, even in the cassette type sub-relay box 30 in which the layout of the electric components 35 has been difficult in the related art, it is possible to easily mount components sufficiently for a required circuit.

After the sub relay box 30 is mounted on the mounting portion 21 of the main relay box 20, the main relay box 20 and the sub relay box 30 are mounted.
Is covered with a waterproof cover 40, so that the relay box 10 having excellent waterproof properties and the like is assembled. The relay box 10 assembled in this manner is fixed to a predetermined position of the vehicle via the mounting brackets 22 and 24. Further, since the cut-out portion 31 of the sub-relay box 30 is formed only on the bottom surface 30b side after being fixed to a predetermined position of the vehicle, it is possible to prevent water from being blown up from that portion.

FIG. 3 is a plan view showing a state before assembly of an electric junction box according to another embodiment of the present invention. A relay box 10 ′ as an electric connection box according to the other embodiment is a main relay box made of synthetic resin and having a flat L-shape having a concave mounting portion 21 and a mounting bracket 22 protruding from the mounting portion 21. Box main body) 20 'and a synthetic resin cassette type sub-relay box (sub connection box main body) 3 mounted on the mounting portion 21 of the main relay box 20'.
0 'and the main relay box 2
It is composed of a box-shaped waterproof cover 40 'made of synthetic resin and covering the 0' and the sub-relay box 30 '. The left side (one side) 22b of the mounting bracket 22
The upper surface 23 of the reinforcing rib 23 integrally formed from the lower side
a, a columnar boss (locking portion) 29 for positioning is integrally formed and protruded from the bottom surface 3 of the sub-relay box 30 '.
The point that an elongated hole (engaging portion) 39 into which the boss 29 is engaged is formed in the second notch bottom surface 32b of the notch 31 on the 0b side.
Different from the above embodiment. Since other configurations are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals, and detailed description is omitted.

[0027] A relay box 10 'of another embodiment.
According to this embodiment, the same operation and effect as those of the above-described embodiment can be obtained, and the second cut-out bottom surface 3 of the cut-out portion 31 of the sub-relay box 30 ′ facing the positioning boss 29 of the reinforcing rib 23.
By forming the long hole 39 into which the positioning boss 29 is inserted in 2b, it is possible to effectively use the lower right corner in the drawing of the sub relay box 30 ', which has been a dead space in the above embodiment. At the same time, the workability of assembling the main relay box 20 'and the sub relay box 30' can be improved. After the assembly, the positioning boss 29 can further reliably prevent the main relay box 20 'and the sub relay box 30' from rattling.

According to each of the above-described embodiments, the upper surface of the reinforcing rib is brought into contact with the second notch bottom surface of the notch portion.
The oblique side surface of the mounting bracket is brought into contact with the first notch side surface of the notch, but the upper surface of the mounting bracket is brought into contact with the first notch bottom surface of the notch portion, or the side surface of the reinforcing rib is provided. And the second notch side surface of the notch may be brought into contact. Although the relay box has been described as an electric connection box, the above embodiments may be applied to an electric connection box such as a fuse box or a junction box. Furthermore, while the positioning boss is used as the locking portion and the long hole is used as the engaging portion, various projections are used as the locking portion, and the concave portion where the convex portion is engaged is used as the engaging portion. It may be shaped.

[0029]

As described above, according to the first aspect of the present invention, since the mounting bracket is provided with the reinforcing rib, the mounting bracket can be reinforced by the reinforcing rib to prevent the mounting bracket from being damaged, and the sub-connection can be prevented. The box body can be reinforced for mounting and holding. Further, since the cutout portion is provided only on the bottom surface side of the sub-connection box main body facing the reinforcing rib, the effective space of the sub-connection box main body can be expanded as compared with the related art.

According to the second aspect of the present invention, a low-height electric component can be freely mounted on a portion facing the cutout portion of the sub-junction box main body. Electric parts can be mounted on the main body part, and the attachment of parts can be improved.

According to the third aspect of the present invention, a reinforcing rib projects from a lower side of one side surface of the mounting bracket, and a cutout portion of the sub-connection box main body is provided on an upper surface of the reinforcing rib and on one side surface of the mounting bracket. Since the notch bottom and notch side are made free to contact, the play of the sub-junction box main body against the mounting part of the junction box main body can be absorbed, and when the sub-junction box main body is mounted on the mounting part of the junction box main body. It is possible to eliminate backlash in the up-down direction and the left-right front-rear direction.

According to the fourth aspect of the present invention, the engaging portion for positioning is provided on the reinforcing rib, and the engaging portion engaged with the engaging portion is provided on the notch bottom surface of the notch portion of the sub-connection box main body. So
The dead space of the sub-junction box main body can be effectively used, and the workability of assembling the junction box main body and the sub-junction box main body can be improved.

[Brief description of the drawings]

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

FIG. 2A is a plan view of a sub-junction box main body used in the electric junction box, and FIG. 2B is a front view of the sub-junction box main body.

FIG. 3 is a plan view showing a state before assembly of an electric junction box according to another embodiment of the present invention.

FIG. 4 is a perspective view of a main part of a junction box main body and a sub junction box main body before assembling an electric junction box of another embodiment.

FIG. 5 is a plan view showing a state before assembling an electric junction box of a conventional example.

[Explanation of symbols]

 10, 10 'relay box (electric junction box) 20, 20' main relay box (junction box main body) 21 mounting portion 22 mounting bracket 22b one side surface 23 reinforcing rib 23a upper surface 29 positioning boss (locking portion) 30, 30 ' Sub-relay box (sub-junction box main body) 30b Bottom surface 31 Notch portion 32b Notch bottom surface 33a Notch side surface 35 Electrical component 39 Slot (engagement portion)

Claims (4)

[Claims] 1. An electrical junction box comprising a connection box main body having a concave mounting portion, a mounting bracket projecting from the mounting portion, and a sub connection box main body mounted on the mounting portion of the connection box main body. An electric connection box, wherein a reinforcing rib is provided on a mounting bracket, and a cutout portion having a cutout bottom surface abutting on the reinforcing rib is provided on a bottom surface side of the sub-connection box body facing the reinforcing rib. 2. The electrical connection box according to claim 1, wherein a low-height electrical component is freely mountable on a portion of the sub-connection box body facing the notch. box. 3. The electrical junction box according to claim 1, wherein the reinforcing rib projects from a lower side of one side surface of the mounting bracket, and an upper surface of the reinforcing rib and one side surface of the mounting bracket. An electric connection box, wherein a cutout bottom surface and a cutout side surface of a cutout portion of the sub connection box main body are freely contactable. 4. The electric junction box according to claim 1, wherein a locking portion for positioning is provided on the reinforcing rib, and the locking portion is provided on a notch bottom surface of the notch portion of the sub-connection box body. An electric connection box, wherein an engagement portion to be combined is provided.