JP2901136B2 - Waterproof box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof box used for an electric junction box of an automobile.

[0002]

2. Description of the Related Art FIG. 3 is a side sectional view of a conventional waterproof type electric junction box described in Japanese Patent Application Laid-Open No. 1-113583.
FIG. 4 is an enlarged view of a part IV in FIG. This electric connection box comprises a box body 1 and a cover 2 for closing an opening 1a of the box body 1. At a lower end of a peripheral wall 4 of the cover 2, a concave groove 5 into which an upper end of the peripheral wall 3 of the box body 1 is inserted. A packing 6 made of an elastic material, which is formed and presses the distal end of the peripheral wall 3 of the box body 1 into the concave groove 5, is press-fitted.

According to this electric junction box, the box body 1
By inserting the upper end of the peripheral wall 3 into the concave groove 5 at the lower end of the peripheral wall 4 of the cover 2 and locking the cover 2 to the box main body 1, the opening 1a of the box main body 1 can be closed in a liquid-tight manner. it can.

[0004]

By the way, conventionally,
Since the packing 6 was simply press-fitted into the groove 5, there was a problem that the packing 6 was easily detached.

The present invention has been made in view of the above circumstances, and has as its object to provide a waterproof box in which packing is prevented from coming off.

[0006]

According to the first aspect of the present invention,
A box body and a cover for closing the opening of the box body, a groove for receiving the other end is formed at one end of the peripheral wall of the box body or the peripheral wall of the cover, and the other groove is formed in the groove. In a waterproof box into which a packing made of an elastic material for press-fitting and waterproofing the tip of the groove is press-fitted, on the side wall of the groove, a plurality of each are provided at intervals in the extending direction of the groove.
Forming a recess independently and recessed from the opening edge of the groove
And a part of the packing is inserted into the recess.
The locking wall that prevents the packing from coming out of the groove
It is provided on the opening edge of the recess .

According to a second aspect of the present invention, there is provided the waterproof box according to the first aspect, wherein the concave portion of the concave groove is provided.
Open the bottom wall of the recess from the bottom of the recess to the end face of the opening.
A through hole communicating with the portion is provided .

[0008]

According to the first aspect of the present invention, the packing that has entered the recess is caught by the locking wall at the opening edge of the recess, thereby preventing the packing from coming off from the inside of the recess. In addition, since a plurality of recesses are independently provided at intervals in the extending direction of the groove, the packing is caught on the end wall of the recess (the end wall in the direction in which the groove extends), and the packing is shifted laterally (the groove). In the extending direction).

According to the second aspect of the present invention, the concave portion can be formed by using the through hole provided in the bottom wall of the concave groove as a punching hole.
Further, by inserting the tip of the driver or the like from the through hole, the packing can be easily removed from the inside of the concave portion, and replacement of the packing becomes easy.

[0010]

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

The waterproof box of this embodiment comprises a box body and a cover. Since the box body is the same as that shown in FIG. 3, illustration is omitted and only the cover 2A is shown in FIG. FIG. 1 is a view of the cover 2A viewed from below,
FIG. 2 is an enlarged view of a main part of the cover 2A.

The cover 2A has a concave groove 5 having a rectangular cross section at the tip of the peripheral wall 4, as shown in FIG. Of the outer and inner inner walls 5a and 5b of the groove 5, the outer inner wall 5a is provided with the inner wall 5a of the opening edge 5c of the groove 5.
A plurality of rectangular parallelepiped concave portions 10 recessed from the position are independently formed at intervals in the direction in which the concave grooves 5 extend.
A part of the packing 6 press-fitted into the concave groove 5 enters the inside of the groove 0.

In this case, as shown in FIGS. 2A and 2C, the inner wall 5a of the opening edge 5c of the concave groove 5 remains as the locking wall 11 above the concave 10 so that the concave 10 The packing 6 that has entered the inside is caught by the locking wall 11,
It does not come off. The packing 6 that has entered the recess 10 is hooked on the end wall 10a of the recess 10 (the end wall in the extending direction of the recess 5), and the packing 6 is laterally shifted (shift in the extending direction of the recess 5). Not to be.

The recess 10 faces the outside through a through hole 12 having the same cross section as the recess 10 provided in the bottom wall 5d of the groove 5. This through-hole 12 is used as a mold release hole during molding.

In the cover 2 of this structure, since a part of the packing 6 enters into the concave portion 10 provided in the inner wall 5a of the concave groove 5, it is possible to prevent the packing 6 from coming off while having a simple structure. And lateral displacement can also be prevented. Further, since there is a through hole 12 in the bottom wall 5d of the concave groove 10, the concave portion 10 can be easily formed by using the through hole 12 as a die-cutting hole. Further, it is possible to insert the tip of the driver or the like from the through hole 12, whereby the packing 6 can be removed from the recess 10, and the replacement of the packing 6 becomes easy.

In the above embodiment, the case where the concave portion 10 is provided on the inner side wall 5a outside the concave groove 5 is shown. However, the concave portion 10 may be provided on the inner side inner wall 5b, or both sides may be provided with the concave portion. 10 may be provided.

Further, the case where the concave groove 5 is provided on the cover 2 side and the tip of the peripheral wall 3 on the box main body 1 side is inserted into the concave groove 5 has been shown. On the contrary, the concave groove 5 is provided on the box main body 1 side. Provided,
The end of the peripheral wall on the cover 2 side may be inserted into the groove.

[0018]

As described above, according to the first aspect of the present invention , the packing that has entered the recess is caught on the locking wall.
The packing comes out of the groove inadvertently
Never. Also, since only a concave portion is provided in the concave groove,
With a single structure, packing can be securely prevented from coming off
You. Furthermore, a plurality of recesses are spaced at intervals in the direction in which the grooves extend.
By providing each independently, the end wall of the concave portion (extending of the concave groove)
Packing is caught on the end wall in the direction of
(Shift in the extending direction of the concave groove) can be prevented.

The same effect as that of the first aspect is obtained.
In addition to forming a concave part using a through hole as a die-cutting hole
The cover can be easily formed. Further
Into the recess by inserting the tip of the driver through the through hole
The packing can be easily removed from the inside and the packing can be replaced.
Becomes easier.

[Brief description of the drawings]

FIG. 1 is a bottom view of a cover of a waterproof box according to an embodiment of the present invention.

FIGS. 2A and 2B are partially enlarged views of a cover of FIG. 1, wherein FIG. 2A is an enlarged view of a portion IIa of FIG. 1, and FIG.
IIb arrow sectional drawing, (c) is IIc-IIc of (a) figure.
It is arrow sectional drawing.

FIG. 3 is a side sectional view showing the entire configuration of a conventional waterproof box.

FIG. 4 is an enlarged view of a portion IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box main body 2 Cover 3 Perimeter wall 4 Perimeter wall 5 Concave groove 5a Inner side wall 5c Opening edge 5d Bottom wall 6 Packing 10 Depression 12 Through hole

Claims (2)

(57) [Claims] 1. A box main body and a cover for closing an opening of the box main body, a concave groove for receiving the other front end is formed at one end of a peripheral wall of the box main body or a peripheral wall of the cover. In a waterproof box into which a packing made of an elastic material for press-contacting and waterproofing the other end is press-fitted, a side wall of the groove is provided at intervals in an extending direction of the groove.
A plurality of recesses each independently and recessed from the opening edge of the groove
Forming a part of the packing into the recess.
To prevent the gasket from coming out of the concave groove
A waterproof box having a stop wall at an opening edge of the recess . 2. The waterproof box according to claim 1, wherein
On the bottom wall of the concave groove at the position where the concave portion is provided,
A through hole that opens from the bottom to the open end face and communicates with the outside
A waterproof box characterized by being provided .