JP3334617B2 - 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 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 non-separably assembled by engagement between locking portions provided at corresponding positions of the two cases. In particular, in an electrical junction box in which electrical components that do not need to be replaced are housed, unnecessary disassembly is avoided by providing a plurality of engaging portions in each case.

A conventional electric junction box having a plurality of engaging portions will be described below with reference to FIGS.
As shown in FIG. 4, the electric connection box 51 includes a lower case 52 in which electrical components are stored, and an upper case 53 attached to the lower case 52.

[0005] A plurality of engaging projections 54 are formed on a side wall 52a of the lower case 52. In the side wall 53a of the upper case 53, a cut-out portion 55 is provided at a position corresponding to each of the engagement protrusions 54 to allow insertion of each of the engagement protrusions 54. A plurality of engaging portions 56 that are engaged with are formed to protrude, respectively. As shown in FIG. 5, each of the engagement portions 56 has a recess 57 therein. Also, as shown in FIG.
The side wall 5 of the upper case 53 at each engagement portion 56
At the lower end of the wall 58 opposed to 3a, a projection 59 is formed to be engaged with each of the engagement projections 54 of the lower case 52.

Therefore, such a conventional electric connection box 5
In 1, the upper case 53 and the lower case 52 are non-separably assembled by engaging the respective engagement portions 56 of the upper case 53 with the respective engagement protrusions 54 of the lower case 52.

On the other hand, the electric connection box 51 is disassembled and discarded for each material in consideration of reuse, for example, at the time of disposal of a vehicle. Therefore, in these cases,
The upper case 53 and the lower case 52 need to be separated from each other by releasing the engagement between the engagement portions 56 and the engagement protrusions 54. Specifically, first, as shown in FIG. 5, the protrusion 59 of the engagement portion 56 and the side wall 5 of the lower case 52 are provided.
A jig (not shown) or the like is inserted into a gap C between the first and second members 2a. Next, the engaging portion 56 is bent in the direction indicated by the arrow F in FIG.
On the engaging projection 54 of the lower case 52.
Thereby, the projection 59 and the engagement projection 54 are temporarily released. And do these tasks one by one,
By temporarily releasing the engagement state between all the engagement portions 56 and the engagement protrusions 54, the lower case 52 and the upper case 5
3 can be separated.

[0008]

However, in the above-mentioned conventional electric connection box 51, when a downward load is applied to the engaging portion 56 of the upper case 53 in the temporarily released state described above, the electric connection box 51 is again engaged. It will be in the combined state. For this reason, each engaging portion 5
6 and the engaging projections 54 are sequentially released in order, there is a risk that the temporarily released engaging portions 56 and the engaging projections 54 may be engaged again. Was complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric junction box which can easily disengage and easily disassemble. It is in.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a first case having a plurality of engaging projections is engaged with each of the engaging projections. An electrical junction box having a plurality of engagement portions and a second case assembled to the first case, wherein each of the engagement portions is
A wall portion facing the side wall of the second case, and formed on both sides thereof.
A peripheral wall which, with the cross-sectional to respective engagement projection fracture at the time of separating the first case and the second case to be <br/> and having a projection for engaging the engagement projection and a disengagement means for releasing the engagement of said engagement releasing means, extending from the wall portion,且
The protrusion is provided at the base end, and the protrusion and the engagement protrusion are
In the engaged state, the tip projects beyond the bottom surface of the first case.
The gist of the present invention is that the section is a flat section configured to be put out.

According to the second aspect of the present invention, in the electrical junction box according to the first aspect, the projecting portions of the section are connected to each other .
At the base end of the bridge, there is a notch to promote the breakage of the section.
The point is to be prepared .

[0012]

[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 structure of the upper case attached to the lower case 52. Now, as shown in FIGS. 1 and 2, the electric connection box 11 is
And the lower case 52.

In the side wall 12 a of the upper case 12, at positions corresponding to the respective engagement protrusions 54 of the lower case 52, the respective engagement protrusions 54 are attached with the assembling of the upper case 12 and the lower case 53. Is provided, and a plurality of engaging portions 14 that engage with the respective engaging protrusions 54 are formed to protrude, respectively. As shown in FIG. 2, each of the engaging portions 14 has a concave portion 15 provided therein. Also, as shown in FIGS. 1 and 2, each engaging portion 14 is provided on the side wall 1 of the upper case 12.
The wall portion 16 is formed of a wall portion 16 opposed to 2a and peripheral walls 16a formed on both sides thereof. At the lower end of the wall portion 16, a piece 17 as an engagement releasing means extends downward. Each section 17
A projection 18 that engages with the engagement projection 54 of the lower case 52 protrudes from the inside of the lower case 52.

In the thus constructed electric junction box 11, similarly to the above-described conventional electric junction box 51, the engaging portion 14 of the upper case 12 and the lower case 5 are connected.
The upper case 12 and the lower case 52 are non-separably assembled by engaging the two engagement protrusions 54.

On the other hand, when separating the upper case 12 and the lower case 52, as shown in FIG.
A force is applied in a direction indicated by an arrow F in FIG. Thereby, each section 17
Is a wall 16 and a section 17 shown by a two-dot chain line in FIGS.
With respect to the fulcrum of the boundary b, the bending in the arrow F direction. When further force is applied, the section 17 is broken and folded at the same boundary b. The protrusion 18 that engages with the engagement protrusion 54 is the section 1
7, the engagement between the engagement projection 54 and the projection 18 is released by such breakage of the piece 17.
These operations are performed one by one in order, and the lower case 52 and the upper case 12 can be separated from each other by releasing the engagement states of all the engagement portions 14 and the engagement protrusions 54. . Moreover, at this time, the engaging portion 1
Since the projection 18 of No. 4 is not folded off together with the piece 17, the already released engagement portion 14 and the engagement projection 54 do not re-engage.

As described in detail above, according to the present embodiment, the following effects can be obtained. (1) By applying an external force in the direction of arrow F shown in FIG. 2 to each section 17 of the upper case 12, each section 17 can be easily broken at the boundary b and folded. For this reason, the projection 18 of the section 17 and the lower case 5
In order to release the engagement state with the second engagement projection 54, the same piece 17 may be folded, and once the engagement state is released, the already engaged engagement portion 14 and the engagement projection 14 are released. The portion 54 does not re-engage. Therefore, the electric junction box 1
1 can be easily performed.

(2) Since the piece 17 extends from the engaging portion 14 of the upper case 12, the engagement between the projection 18 formed on the piece 17 and the engagement projection 54 of the lower case 52 is performed. Is released, a finger can be hooked on the section 17 to break the section 17. Moreover, section 1
7 and the boundary b, there is a distance between
Can be easily broken with a small force. Therefore, no jig or the like is required for the operation of separating the lower case 52 and the upper case 12, and the operation can be easily performed.

(3) The work of assembling the upper case 12 and the lower case 52, that is, the upper case 12
If it is difficult to engage each engaging portion 14 with each engaging projection 54 of the lower case 52, the corresponding piece 17 is bent in the direction of arrow F shown in FIG. If it does, it can be easily engaged. Therefore, the mounting operation can be easily performed.

The embodiment of the present invention may be modified as follows. -As shown in FIG. 3, the wall 16 of the engaging portion 14 and the section 1
A notch 21 is provided on the side of the concave portion 15 at the boundary b (shown by a two-dot chain line) with 7. In this way, when releasing the engagement between the engagement portion 14 and the engagement protrusion 54, the section 17 can be more easily broken. Therefore, the disassembly operation of the electric connection box 11 can be performed more easily.

The number and position of the engaging portions 14 of the upper case 12 and the engaging protrusions 54 of the lower case 52 are not limited to the above-described embodiments, and may be changed as appropriate according to the size and shape of the electric connection box 11. Shall be performed.

In the above embodiment, the upper case 1
2, each engaging portion 14 is formed on the lower case 52, and each engaging protrusion 54 is formed on the lower case 52, and each engaging portion 14 is formed on the lower case 52. It may be formed.

[0024]

According to the first aspect of the present invention, the engagement between the engagement projection and the engagement portion can be easily released by breaking the engagement release means. The work of separating the case and the second case can be easily performed.

Further, when releasing the engagement between the engaging projection and the engaging portion, the finger can be hooked on the section to break the section. Therefore, a jig or the like is not required for the operation of separating the first case and the second case, and the operation can be easily performed.

According to the second aspect of the present invention, when releasing the engagement between the engaging portion and the engaging projection, the slice can be more easily broken.

[Brief description of the drawings]

FIG. 1 is an enlarged front view showing a part of an electric junction box according to an embodiment;

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing another embodiment.

FIG. 4 is an exploded perspective view showing a conventional electric junction box.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Electrical connection box, 12 ... Upper case (2nd or 1st case), 14 ... Engagement part, 17 ... Slice (disengagement means), 21 ... Cut part, 52 lower case (1st or 2nd case) ), 54 ... engagement projection.

Claims (2)

(57) [Claims] A first case having a plurality of engaging projections;
An electrical connection box comprising: a plurality of engagement portions that engage with the respective engagement protrusions; and a second case that is assembled to the first case . Wall facing the side wall of the case
When, a peripheral wall formed on both sides thereof, the engaging sectional broken when separating the first case and the second case together to have a protrusion to be engaged with the engagement projection to respective engagement projection and a disengagement means for releasing the engagement between the said engagement releasing means, extending from the wall portion, and wherein
A projection is provided at the base end, and the engagement between the projection and the engagement projection is provided.
In the state, the tip protrudes from the bottom surface of the first case
Electrical junction box which is a flat section configured as described above . 2. The electrical junction box according to claim 1, wherein the section is located at a position closer to a base end than the protrusion in the section.
An electric junction box provided with a notch for promoting breakage of the electrical junction box.