JP2000217226A - Electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connection box, wherein an engaging portion for engaging a first case with a second case can be formed with ease, even if the locking portion for securing installed items is formed. SOLUTION: A plurality of engaging projections 55 are formed on sidewalls 54 of an upper case 53, and a plurality of engaging portions 17 to be engaged with the respective engaging projections 55 are formed on fitting walls 14 of a lower case 12. A plurality of locking portions 20 are formed on a sidewall 13 of the lower case 12. The locking portions 20 are provided with a pair of support portions 21 projectingly formed on a sidewall 13 and an anchoring piece 24 formed between the support portions 21. The engaging portions 17 are formed between the pair of the support portions 21 of the locking portions 20, respectively.

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 for housing electric components such as electric circuits and electronic components.

[0002]

2. Description of the Related Art An electric connection box is used as a connection branch point for wiring such as a wire harness while accommodating various electric parts such as various electric circuits and electronic parts for automobiles.

Generally, in such an electric junction box,
An upper case and a lower case are provided, and the upper case and the lower case are connected and held by engagement between engagement portions provided at corresponding positions of the two cases.

FIG. 5 shows a conventional electric junction box having a plurality of engaging portions. The electric connection box 51 is formed of a synthetic resin, and includes a lower case 52 in which electrical components are accommodated.
Upper case 53 assembled to the lower case 52
And

A plurality of engaging projections 55 are formed on the side wall 54 of the upper case 53 along the mounting direction. A fitting wall 57 is formed so as to surround the side wall 56 along the mounting direction of the lower case 52,
A plurality (four in FIG. 5) of engaging portions 60 with which the respective engaging protrusions 55 are engaged are formed on the fitting wall 57, respectively. Each engaging portion 60 is formed by forming two notches 58 adjacent to each other at the upper end of the fitting wall 57 and forming a groove 59 between the two notches 58 at the lower end of the fitting wall 57. .

Therefore, in such a conventional electric junction box 51, the upper case 53 is fitted into the fitting wall 57 of the lower case 52, and each of the engaging projections 55 is connected to each of the engaging portions 60.
To the upper case 53.
And the lower case 52 are connected and held.

[0007] At one side of the side wall 56 of the lower case 52, a mounting portion 61 for mounting the electric junction box 51 to a vehicle or the like is provided.

[0008]

In the above-mentioned conventional electric connection box 51, an upper case 53 may be used depending on a vehicle type specification.
A lock portion for fixing the cover to one of the lower case 52 and the side wall 56 of the lower case 52 and a lock portion for fixing the connector or the connector holder are required.

However, if the lock portions for the cover, the connector, or the connector holder are densely formed on the side wall 56 of the lower case 52, there is a problem that there is no space for forming the engagement portion 60.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to form a first case and a second case even if a lock portion for fixing an attachment is formed. An object of the present invention is to provide an electric connection box in which an engaging portion for engaging can be easily formed.

[0011]

According to a first aspect of the present invention, the first case includes a first case having a plurality of engaging portions, and a plurality of engaging portions engaging with each of the engaging portions. A second case attached to one case, wherein the first case or the second case
A plurality of lock portions for fixing an attachment are formed on a side wall along a mounting direction of the case, and the lock portion is configured to face a pair of support portions protrudingly formed on the side wall and the side wall. An electrical connection box provided between the two support portions and having an engagement piece engaged with the engagement portion of the attachment, wherein the plurality of engagement portions in the first case or the second case are each The gist is that it is formed between a pair of support portions in the lock portion.

According to a second aspect of the present invention, in the electrical junction box according to the first aspect, the lock portion includes a pair of guide portions on both sides of the engagement piece.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, the same components as those of the above-described conventional electric connection box 51 have the same reference numerals, and a detailed description thereof will be omitted.

The present embodiment differs from the above-described conventional electric junction box in the configuration of the lower case in which the upper case 53 is fitted. Now, as shown in FIG. 1, the electric connection box 11 includes the upper case 53 as a first case and the lower case 1 as a second case.
2 is provided.

A fitting wall 14 is formed so as to surround the side wall 13 along the mounting direction of the lower case 12, and a plurality of engaging projections 55 are engaged with the fitting wall 14 (FIG. 1). (Four) engaging portions 17 are respectively formed. Each engaging portion 17 is formed by forming two notches 15 adjacent to each other at the upper end of the fitting wall 14 and forming a groove 16 between the two notches 15 at the lower end of the fitting wall 14. .

By forming two notches 15 close to each other at the upper end of the fitting wall 14 and forming a groove 16 between the two notches 15 at the lower end of the fitting wall 14, the engagement of the upper case 53 is reduced. A plurality of (four in the figure) engaging portions 17 with which the joint portions 61 are engaged are formed.

Further, on the side wall 13 of the lower case 12,
A plurality (two in FIG. 1) of lock portions 20 for fixing an attachment such as a cover, a connector or a connector holder are formed corresponding to the respective engagement portions 17. FIG. 1 shows the connector 30 as an attachment fixed to the lock unit 20.

As shown in FIG. 2, the lock portion 20 has a pair of support portions 21 formed to protrude outwardly of the side wall 13 so as to extend in the vertical direction.
A pair of guide portions 22 protruding from the side wall 13 so as to extend in parallel with the first guide portion 22. The support portion 21 and the guide portion 22 adjacent to each other are connected at their lower ends by a connection portion 23 protruding from the side wall 13. An engagement piece 24 is provided between the ends of the support portions 21 so as to face the side wall 13. A hole 25 is formed at an intermediate portion of the engagement piece 24 from the side of the connecting portion 23, and the hole 25 allows a locking projection 35 as a locking portion of the connector 30 to enter.

In the electric junction box 11 according to the present embodiment, a plurality of lock portions 20 are formed over a half or more of the side wall 13 of the lower case 12 in the width direction. For this reason, the plurality of engaging portions 17 are formed so that the locking wall 20 does not overlap with the locking portions 20.
4 cannot be formed. Therefore, in the present embodiment, a groove 16 is formed in the fitting wall 14 between the pair of support portions 21 of each lock portion 20, and two notches 15 are formed at the upper end of the fitting wall 14 so as to sandwich the groove 16. By forming, each engaging portion 17 is formed. The engagement projections 55 of the upper case 53 are formed at positions corresponding to the respective engagement portions 17.

A mounting portion 19 for mounting the electric connection box 11 to a vehicle or the like is provided on one side of the peripheral wall 13 of the lower case 12. Therefore, in the electric junction box 11 thus configured, similarly to the above-described conventional electric junction box 51, the upper case 53 is connected to the lower case 1.
The upper case 53 and the lower case 12 are connected and held by fitting into the second fitting walls 14 and engaging the respective engaging protrusions 55 with the respective engaging portions 17.

The electric junction box 1 constructed as described above
1, the connector 30 is attached. Therefore, the manner of assembling the electrical junction box 11 and the connector 30 will be described with reference to FIGS.

As shown in FIG. 1, the connector 30 has an engagement portion 31 connected to the lock portion 20. This allows
The connector 30 is mounted on the electric connection box 11. That is, as shown in FIG. 4, a part of the flexible piece 33 and the guide part 32 of the connector 30 is inserted into the lock part 20. The flexible piece 33 bends toward the groove 16 with this insertion, and returns to the original position when the engagement projection 34 reaches the hole 25 of the engagement piece 24. As a result, the engagement protrusion 34 is engaged with the hole 25. For this reason, the connector 30 is connected to the electric connection box 11.
It is supported in a state where it is retained.

As described in detail above, according to the present embodiment, the following effects can be obtained. In the lower case 12, a groove 16 is formed in the fitting wall 14 between the pair of support portions 21 of each lock portion 20, and two notches 15 are formed at the upper end of the fitting wall 14 so as to sandwich the groove 16. By doing so, each engaging portion 17 is formed. Therefore, even if the plurality of lock portions 20 are formed densely over the entire side wall 13 of the lower case 12, for example, the engagement portions 17 for connecting and holding the upper case 53 and the lower case 12 can be easily formed. Thus, the degree of freedom in designing the outside of the electric connection box 11 can be improved.

A connector 30 is provided at an intermediate portion of the engagement piece 24.
Since the hole 25 allowing the engagement projection 35 to enter is formed, the thickness of the engagement piece 24 can be reduced, and the resin material for the hole 25 can be reduced, and the manufacturing cost can be reduced. Can be reduced.

The above embodiment may be modified as follows. The engagement piece 24 of the above embodiment is formed to be slightly thicker, and a groove is formed on the side wall 13 side of the engagement piece 24 without forming the hole 25, and the engagement protrusion 34 of the connector 30 is locked. May be formed. By doing so, the strength of the engagement piece 24 can be improved.

Each engaging projection 55 of the upper case 53
The number and position of the respective engaging portions 17 of the lower case 12 are not limited to the above-described embodiments, and the number and size of the lock portions 20 formed on the side wall 13 of the lower case 12, the size of the electric connection box 11, and the like. It should be appropriately changed depending on the shape and the like.

In the above embodiment, the upper case 5
3, each engaging protrusion 55 is formed, and each engaging portion 17 is formed on the lower case 12. However, each engaging portion is formed on the upper case 53, and each engaging protrusion is formed on the lower case 12. You may do so.

Next, other technical ideas that can be grasped from the above embodiments will be described. · (A) In the electrical junction box according to claim 1 or 2,
The electric connection box, wherein the lock portion includes a pair of guide portions on both sides of the engagement piece.

[0029]

According to the first or second aspect of the present invention, even if a lock portion for fixing an attachment is formed, the first case and the second case can be engaged. The engagement portion can be easily formed.

According to the second aspect of the present invention,
The number of resin materials can be reduced, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an electric connection box of one embodiment.

FIG. 2 is a partial front view showing the vicinity of a lock unit.

FIG. 3 is a partial plan view showing the vicinity of a lock unit.

FIG. 4 is a sectional view showing a state where the connector is mounted on the box body.

FIG. 5 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

12: Lower case as second case, 13: Side wall,
17 ... engaging part, 20 ... lock part, 21 ... support part, 24 ...
Engagement piece, 25: hole, 30: connector as attachment,
35: engagement projection as a locking portion; 53: upper case as a first case; 55: engagement projection as an engagement portion.

Claims (2)

[Claims] A first case having a plurality of engaging portions, and a second case having a plurality of engaging portions engaging with the respective engaging portions and being assembled to the first case; A plurality of lock portions for fixing an attachment is formed on a side wall along the mounting direction of the first case or the second case, and the lock portion includes a pair of support portions protrudingly formed on the side wall, An electrical junction box provided between both supporting portions so as to face the side wall and engaging with an engaging portion of the attachment, and a plurality of the first and second cases. An electric connection box in which the engaging portion is formed between a pair of support portions in each of the lock portions. 2. The electric junction box according to claim 1, wherein the engagement piece is provided with a hole for allowing the engagement portion of the attachment to enter.