JPH07298451A - Electric connection box - Google Patents

Abstract

PURPOSE:To hold an effectively engaging state by correcting a warpage even if a cover has the warpage by allowing a correcting hook of an L-shaped section to protrude from an outer peripheral wall of a case, and inserting the peripheral wall of the cover between a vertical wall and the outer peripheral wall of the case, thereby holding the peripheral wall of the cover at a normal position. CONSTITUTION:A correcting hook 11b of an L shape protrudes from the outer peripheral wall of a case 11. Thus, even when a cover 12 having a warpage on the peripheral wall is engaged with the case 11, the peripheral wall of the cover 12 is inserted between the outer peripheral wall of the case 11 and the vertical wall of the hook 11b, and hence the warpage is corrected, and both are fixedly holed at the normal positions. The upper surface of the vertical wall of the hook 11b is directed toward the peripheral wall of the case 11 to provide a downwardly oblique taper. Accordingly, even if the cover 12 having the warpage is engaged, the lower end of the peripheral wall of the cover 12 is first inserted along the taper of the hook 11b, and hence both can be fixed in the normal state merely by externally engaging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical junction box, and more particularly, in a resin-molded electrical junction box, a cover that closes an opening of a case for accommodating an electrical connection component is straightened and the cover is corrected. Is to be securely fixed and held in the opening of the case.

[0002]

2. Description of the Related Art The electric junction box mounted on this type of vehicle is
As shown in FIG. 8, it comprises a case 1, an upper cover 2 and a lower cover 3, each of which is molded from a resin such as PP (polypropylene). The electric connection box accommodates an electric connection component (not shown) such as a relay inside a case 1, and has the upper cover 2 in the upper opening 1a.
And the lower end of the peripheral wall 2a of the upper cover 2 is brought into contact with the upper surface of the positioning portion 1b of the case 1, and three or four lock portions 2b are formed at required positions on the peripheral wall 2a and the case 1.
The locked portion 1c is fixedly held by being locked. Further, the lower cover 3 is externally fitted to the bottom surface opening 1d of the case 1, and like the upper cover 2, the lock portion 3a and the locked portion 1e of the case 1 are locked and fixedly held.

[0003]

Among the electric connection boxes described above, particularly in the case of a large-sized or thin-walled electric connection box, as shown in FIG. Slipping is likely to occur. As described above, when warping occurs in the upper cover 2, when the upper cover 2 is externally fitted to the case 1, a gap is generated between the peripheral wall 1f of the case 1 and the peripheral wall 2a of the upper cover 2 to cause various inconveniences. Occurs.

That is, as shown in FIG. 10, the warp causes a problem that the lower end of the peripheral wall 2a of the upper cover 2 does not ride on the positioning portion 1b of the case 1 and is in a state of falling outwardly. In addition, due to the problem of falling, looseness is likely to occur in the engaged state of the case 1 and the upper cover 2, and in the worst case, the lower end of the peripheral wall 2a of the upper cover 2 is placed on the positioning portion 1b of the case 1. The problem of falling out occurs.

The present invention has been made in view of the above problems, and in an electric junction box in which an opening of a case is closed by a cover, even if the cover is warped, the warp is corrected to ensure a secure engagement state. The purpose of the present invention is to provide an electrical junction box that can be held in the.

[0006]

In order to achieve the above object, the present invention comprises, in claim 1, a case for accommodating an electrical connection component therein, and a cover for closing the case,
The peripheral wall of the cover is externally fitted to the peripheral wall of the case, and a straightening hook having an L-shaped cross section is projected from the outer surface of the peripheral wall of the case. The straightening hook is provided between the vertical wall portion of the straightening hook and the outer surface of the peripheral wall of the case. And an electric connection box configured to insert the peripheral wall of the cover into the regular position for holding the peripheral wall of the cover.

The upper surface of the vertical wall portion of the hook is a taper portion which is inclined downward toward the case peripheral wall side, and the case peripheral wall is inserted along the taper portion between the hook vertical wall portion and the case peripheral wall. I have to. (Claim 2) In Claim 3, the case and the cover are provided with a lock portion and a locked portion that engage with each other on either the left or right side or both the left and right sides of the hook installation portion.

[0008]

According to the electric connection box of claim 1 of the present invention, when the cover having the warp on the peripheral wall is fitted to the case, the cover is provided between the outer surface of the peripheral wall of the case and the vertical wall portion of the straightening hook. Since the peripheral wall of the cover is inserted and positioned, the warp of the cover can be corrected and the case and the cover can be fixedly held as the regular position. Moreover, in the electric connection box of claim 2,
Since the upper surface of the vertical wall portion of the straightening hook is provided with a taper portion that is inclined downward toward the peripheral wall of the case, when the cover with warping is fitted, first, the lower end of the peripheral wall of the cover is the straightening hook. The peripheral wall of the cover curved outward is inserted between the vertical wall part and the peripheral wall of the case along the tapered part by abutting the tapered part and further performing a fitting operation. As described above, by merely fitting the cover onto the case, the warp of the cover can be corrected and fixed in a normal state.

Further, in the electrical junction box of the third aspect, the correction hook prevents the backlash of the cover with respect to the case in the horizontal direction, and the correction hook of the case and the cover is formed on one of the left and right sides or both of the right and left sides. By the locking portion and the locked portion, the vertical play of the cover with respect to the case can be prevented.

[0010]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. The electric junction box 10 of the present invention is formed of a resin such as PP (polypropylene), and as shown in FIG. 1, upper and lower openings of a case 11 for accommodating electric connection parts of a vehicle such as a relay are respectively provided with upper covers. The outer cover 12 and the lower cover 13 are externally fitted and fixed in a closed state.

As shown in FIGS. 2 (A) and 2 (B), the case 11 has an L-shaped cross section on a peripheral wall 11a facing a long peripheral wall 12a which is apt to warp of the upper cover 12 fitted in the upper opening. A straightening hook 11b having a shape is projected outward.
The straightening hook 11b is composed of a horizontal wall portion 11c and a vertical wall portion 11d, and the horizontal wall portion 11c is projected from the peripheral wall 11a so as to come into contact with the lower end portion of the upper cover 12 fitted to the outside. The lateral wall portion 11c is a peripheral wall 12a of the upper cover 12.
It has a length protruding from the outer surface, and reinforcing ribs 11g are provided at both ends of the lower surface thereof.

The vertical wall portion 11d has a concave wall surface on the side of the peripheral wall 11a, and has a U-shape when viewed from above, which is composed of both side walls 11d-1 and a connecting wall 11d-2. In the vertical wall portion 11d, the gap between the peripheral wall 11a side end surface of both side walls 11d-1 and the peripheral wall 11a is made substantially the same as the thickness of the peripheral wall 12a of the upper cover 12. Further, the side walls 11d-1 of the vertical wall portion 11d and the upper surfaces of the connecting wall 11d-2 are provided with taper portions 11f which are inclined downward from the upper end on the connecting wall 11d-2 side toward the peripheral wall 11a side.

A positioning portion 1 is provided on the peripheral wall 11a of the case 11.
1h is provided, and the lower end of the peripheral wall 12a of the upper cover 12 is placed and held on the upper surface of the positioning portion 11h. The positioning portion 11h is projected from the outer surface of the peripheral wall 12a of the upper cover 12 with the upper cover 12 fitted on the case 11.

On both left and right sides of the straightening hook 11b,
A lock portion 11m that engages with a locked portion 11d of the upper cover 12, which will be described later, is provided so as to project from above the positioning portion 11h. As shown in FIGS. 5A and 5B, the lock portion 11
m is protruding with a protrusion amount smaller than the positioning portion 11h,
The upper surface is provided with a taper surface that is inclined downward. Further, a through hole 11n is provided in a positioning portion 11h that vertically faces the lock portion 11m, and a tool for removal is used when releasing the engagement state between the lock portion 11m and the locked portion 12d of the upper cover 12. So that it can be inserted.

As shown in FIGS. 6A to 6D, the locked portion 12d formed on the upper cover 12 is formed by recessing the inner surface of the peripheral wall 12a at the position facing the lock portion 11m of the case 11. is doing. The locked portion 12d is shown in FIGS.
As shown in FIG. 5, the upper surface of the stepped portion 12e formed at the lower end is engaged with and fixed to the lower end surface of the lock portion 11m.

The outer surface of the peripheral wall 11a of the case 11 is provided with locked portions 11i and 11j that engage with the claw-shaped lock portion 12b and the frame-shaped lock portion 12c (shown in FIG. 6) protruding from the upper cover 12, 11 and upper cover 12
Is locked at two points and fixedly held. Further, on the lower side of the peripheral wall 11a of the case 11, a locked portion 11k that engages with the frame-shaped lock portion 13a of the lower cover 13 is provided.
And the bottom opening of the case 11 is fixedly held in a closed state by these engagements.

According to the electric junction box 10 described above, the upper cover 12 (shown in FIG. 9) having a warp outward is formed into the case 11.
4A, the lower end of the peripheral wall 12a of the upper cover 12 that bulges outward abuts on the tapered portion 11f of the correction hook 11b, as shown in FIG. 4A.

Next, the peripheral wall 12a of the upper cover 12 is replaced with the peripheral wall 11a of the case 11 along the inclination of the tapered portion 11f.
Then, the peripheral wall 12a of the upper cover 12 is inserted between the vertical wall portion 11d of the straightening hook 11b and the outer surface of the peripheral wall 11a. That is, when the upper cover 12 is externally fitted, the correction hook 11b is used to fix the upper cover 12
Correct the sled of the upper cover 1 against the case 11
The peripheral wall 12a of 2 is hold | maintained at a regular position. On the other hand, case 1
The lock portion 11m and the locked portion 12d of the upper cover 12 are lowered while the step portion 12e at the lower end of the locked portion 12d is pressed outward along the taper of the lock portion 11m and is bent outward.

After that, the lower end of the upper cover 12 comes into contact with the upper surfaces of the lateral wall portion 11c and the positioning portion 11h of the straightening hook 11b, and the lower end surface of the lock portion 11m and the upper surface of the stepped portion 12e of the locked portion 12d engage with each other. To do. At the same time,
Claw-shaped lock portion 1 formed on the outer surface of the upper cover 12
The 2b and the frame-shaped lock portion 12c are engaged with the locked portions 11i and 11j of the case 11, so that the upper cover 12 is securely fixed and held to the case 11.

As described above, when the upper cover 12 is fitted on the case 11, the warp of the upper cover 12 is corrected by the correction hooks 11b, and the peripheral wall 12a of the upper cover 12 can be held at the regular position. . Also,
Since the warp of the upper cover 12 is corrected and the peripheral wall 12a is in the normal position, the lock portion 11m and the locked portion 12d can be reasonably engaged with each other without fail.

Therefore, it is possible to prevent the problem associated with the mounting of the upper cover 12 which is warped as in the conventional case. Further, in the electric junction box 10, the upper cover 12 for the case 11 is provided by the straightening hook 11b.
There are various advantages such as the prevention of horizontal play and the prevention of vertical play due to the engagement of the lock portion 11m and the locked portion 12d.

The present invention is not limited to the above configuration. For example, the lock portion 11m of the case 11 and the locked portion 12d of the upper cover 12 are formed on the left and right sides of the correction hook 11b, respectively. Even if only one of them is formed, the same effect as the above can be obtained. In addition, the correction hook and the lock portion are also formed on the bottom opening side on which the lower cover 13 is fitted, so that the lower cover 13 is formed.
Needless to say, the configuration may be such that the is corrected to the normal position and fixedly held.

[0023]

As is apparent from the above description, in the electric junction box according to claim 1 of the present invention, when the upper cover having the warp on the peripheral wall is fitted in the upper opening of the case, the straightening hook is provided. Thus, the peripheral wall of the upper cover can be inserted between the outer surface of the peripheral wall of the case and the vertical wall portion of the straightening hook to correct the warp, and the peripheral wall of the upper cover can be fixedly held in the case as a regular position. In this manner, since the warp that has occurred can be corrected and the cover can be fixed, problems such as collapse and dropout of the cover that accompany fitting of the cover that has warped can be prevented. In addition, even if the number of locking mechanisms for the case and the cover is reduced as compared with the conventional electric junction box, a reliable fixed state can be maintained.

Further, in the electric connection box of the second aspect, since the taper portion which is inclined downward toward the peripheral wall is provided on the upper surface of the vertical wall portion of the straightening hook, the cover in which the warp occurs is fitted. At this time, the outer peripheral wall of the upper cover can be inserted between the outer peripheral surface of the case and the vertical wall by guiding the outer peripheral wall of the cover curved toward the peripheral wall of the case along the inclination of the tapered portion. That is, since the warp of the upper cover can be corrected only by fitting the upper cover onto the case, the workability of assembling can be improved.

Further, in the electric connection box of the third aspect, in addition to the straightening hook, the case and the upper cover are formed with a lock portion and a locked portion which are engaged with each other, so that the horizontal direction of the upper cover with respect to the case. The play in the direction can be prevented by the correction hook, and the play in the vertical direction can be prevented by the lock portion. In addition, since the lock part and the locked part are formed on both the left and right sides of the correction hook, the upper cover can be corrected to the proper position for reliable engagement, and the fixing strength of the upper cover to the case can be improved. Can also be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric junction box of the present invention.

FIG. 2 shows a case, (A) is a plan view, and (B) is a front view.

FIG. 3 shows a straightening hook of a case, (A) is a front view and (B) is a sectional view taken along line I-I.

4A and 4B are cross-sectional views showing a process of fitting the upper cover to the case.

FIG. 5 shows a lock portion of the case, (A) is a plan view,
(B) is a II-II sectional view.

FIG. 6 shows an upper cover, (A) is a bottom view, (B)
Is a III-III sectional view, (C) is a front view of the locked portion, and (D) is
It is a IV-IV sectional view.

7 (A) and (B) are cross-sectional views showing an engaging process of the lock portion.

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

FIG. 9 is a bottom view showing a state where the upper cover is warped.

FIG. 10 is a cross-sectional view showing a problem caused when warping occurs in the upper cover.

[Explanation of symbols]

 10 electric junction box 11 case 11a peripheral wall 11b straightening hook 11c horizontal wall 11d vertical wall 11f taper 11m lock 12 upper cover 12a peripheral 12d locked 13 lower cover

Claims (3)

[Claims] 1. A case having an electric connection part accommodated therein, and a cover closing the case. The peripheral wall of the cover is fitted onto the peripheral wall of the case, and an L-shaped cross section is formed from the outer surface of the peripheral wall of the case. An electrical connection box configured to project a shape-correcting hook and insert the peripheral wall of the cover between the vertical wall portion of the correcting hook and the outer surface of the peripheral wall of the case to hold the peripheral wall of the cover at a regular position. 2. The upper surface of the vertical wall portion of the hook is a taper portion which is inclined downward toward the case peripheral wall side, and the case peripheral wall is inserted between the hook vertical wall portion and the case peripheral wall along the taper portion. The electrical junction box according to claim 1, which is configured to: 3. The case and the cover are provided with a lock portion and a locked portion that engage with each other on either the left or right side or both the left and right sides of the hook. The electrical junction box described.