JP3153736B2 - 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 box mainly used for protecting a vehicle-mounted electric component such as a fuse box.

[0002]

2. Description of the Related Art A conventional example of this type of box is disclosed in Japanese Utility Model Laid-Open No. 63-118277. As shown in FIGS. 5 and 6, this box is assembled to the box
And a cover body 2 that closes the opening.

At the lower end of the cover body 2, a skirt portion 4 is extended via a step portion 3, and when the box body 1 and the cover body 2 are fitted together, the step portion 3 becomes the opening edge of the box body 1. The skirt 4 is fitted to the outer periphery of the upper end of the box body 1 so as to contact the upper end 1a.

The box main body 1 and the cover body 2 have a rectangular box shape, and lock projections 5 (lock portions) and a lock frame 6 which engage with each other are provided on the outer surfaces of two narrow side walls opposed to each other.
(Lock portion). In this example, a lock frame 6 is formed on the cover body 2 side, and a lock projection 5 is formed on the box body 1 side.

[0005] By the way, in the conventional box, when the cover 2 is fitted to the box body 1, the cover 2
When a force in the direction of lifting the cover 2 upward (arrow A in FIG. 6) is applied, or when a force pressing the cover body 2 rightward (arrow B in FIG. 6) is applied, there is no problem in strength. However, when a “torsion” as shown by an arrow C in FIG. 6 acts on the cover body 2, the cover body 2 bends and the lock frame 6
There is a problem that the lock projection 5 comes off from the lock.

Accordingly, the present applicant has disclosed in Japanese Patent Application Laid-Open No. 6-4270.
No. 3 proposed a box that prevented the cover from coming off due to prying. As shown in FIG.
Forms a pry prevention rib 9 on the cover body 8 and
The box body 10 is provided with an engagement recess 11 for receiving the pry prevention rib 9, and the engagement recess 11 has a regulating wall 14 substantially orthogonal to the two side walls 13 a and 13 b provided on the lock portion 12.
a and 14b are provided.

According to the box 7, even if a large number of lock portions 12 cannot be provided due to various conditions such as the space of the vehicle, the cover can be reliably prevented from coming off due to prying.

[0008]

However, in the box 7, the twist prevention ribs 9 can be provided only in limited places. That is, it can be provided only in a place where a space can be secured between the outer surface of the box body 10 and the inner surface of the cover 8. For this reason, the movement of the cover 8 cannot be reliably restricted at a portion separated from the prying prevention rib 9. Therefore, when the lock portion 12 is provided at a portion separated from the prying prevention rib 9. When the cover 8 is twisted or pressed, the side wall 8
It may not be possible to reliably restrict the spread of a to the outside.

Accordingly, an object of the present invention is to provide a box capable of restricting the movement of the cover due to prying and reliably preventing the cover from coming off.

[0010]

In order to achieve the above object, the invention of claim 1 comprises a box body, a cover body assembled to the box body to close one surface of the box body, the box body and the cover. A lock portion that engages with each other when the body is assembled, wherein the flexible portion protrudes from an outer peripheral surface of a side wall of the cover body.
And a locking hole formed integrally with the supporting foot
The locking part on the cover body side is formed with the locking frame part forming
And a projection protruding from the outer peripheral surface of the side wall of the box body.
Wall portion and the contact wall portion projecting outward from the
Lock projection on the lock part on the box body side that engages with the hole
And the end face of the side wall of the cover body provided on the contact wall portion
A contact surface abutting on an inner side of the lock projection;
Of the cover body projecting from the lock projection side of the
Has an anti-spreading projection to prevent the side wall from spreading out
It is characterized in that.

According to a second aspect of the present invention, there is provided the box according to the first aspect.
The lock portion on the cover body side is flexible.
An operation part is formed on the opposite side of the locking frame part with the support foot part in between
It is characterized by being.

[0012]

[0013]

According to the first aspect of the present invention, for example, when the cover body is squeezed or the cover body is pressed, the side wall of the cover body which is in contact with the contact surface tends to spread outward. The prevention protrusion restricts the movement of the end face of the side wall of the cover inside the lock protrusion. For this reason, the side wall of the cover does not come off the contact surface.

According to the second aspect of the present invention, when the engagement state is released from the state in which the lock projection is engaged with the engagement hole, the engagement portion is operated to bend the engagement frame portion in a corrective manner. The lock projection can be easily pulled out from the inside of the stop hole.

[0015]

[0016]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a lock portion 18 on the box body 16 side and a lock portion 30 on the cover body 17 side of the box of the embodiment, (a) is an exploded perspective view showing the lock portion 36, (b)
FIG. 4 is a cross-sectional view showing a state where the lock portion 36 is engaged. 2 is a plan view showing the box body 16, FIG. 3 is a plan view showing a state where the box body 16 is closed by the cover body 17, and FIG. 4 is a view taken in the direction of the arrow IV in FIG.

As shown in FIG. 2 and FIG.
Are a box body 16, a cover body 17 assembled to the box body 16 to close one surface 16a of the box body 16, and a lock portion 18 engaged with each other when the box body 16 and the cover body 17 are assembled. And The box main body 16 has a substantially U-shaped box shape in plan view, and has a fuse mounting portion 19 and a relay mounting portion 20 provided on one surface (upper surface) 16a. Further, from the outer periphery of the side wall 21 of the box body 16, contact walls 22, 22 are protruded, and the contact walls 22, 22 are provided with lock projections 23, 23. In FIG. 2, reference numeral 24 denotes a mounting foot for mounting the box 15 to a vehicle body or the like.

As shown in FIGS. 1A and 1B,
The box body 16 has a contact surface 26 that contacts the side wall 25 of the cover body 17, and a spread prevention protrusion 27 provided on the contact surface 26 to prevent the side wall 25 of the cover body 17 from spreading outward. ing.

As shown in FIG. 3, the cover body 17 for closing the upper surface 16a of the box body 16 is
And is slightly larger than the box body 16. A step 28 is formed on the side wall 25 of the box body 16, and a skirt 29 is formed below the step 28. The end face of the skirt portion 29 is
Abuts on the contact surface 26 of the box body 16 when assembled in the box body 16. Further, a cover-side lock portion 30 is formed on the outer periphery of the cover body 17.

As shown in FIGS. 1A and 4, the cover-side lock portion 30 includes a flexible support leg 31 projecting outward from the skirt portion 29, and And a locking portion 32 formed integrally. The locking portion 32 includes a locking frame portion 34 forming a locking hole 33 and an operation portion 35. When the operating portion 35 is pressed toward the side wall 25 of the cover body 17, the locking frame 34 moves outward around the support foot 31, and when the pressing on the cover 17 is released, the support foot is released. The locking portion 32 is returned to the original position by the elastic force of 31. The lock projection 23 provided on the contact wall portion 22 is engaged with the lock hole 33 of the lock frame portion 34.

Next, in order to close the upper surface 16a of the box body 16 with the cover body 17, the step 28 of the cover body 17 is brought into contact with the side wall 21 of the box body 16 and the end face of the skirt 29 of the cover body 17 is closed. The cover body 17 is placed on the box body 16 so that the cover body 17 comes into contact with the contact surface 26.
Then, the cover body 17 is pressed toward the box body 16. When the cover 17 is pressed toward the box body 16, the lower end surface of the locking portion 32 slides on the lock projection 23 and rotates outward. Then, when the locking frame portion 34 gets over the locking protrusion 23, the locking protrusion 23 is engaged in the locking hole 33, and the end face of the skirt portion 29 contacts the contact surface 26.

In this state, the skirt portion 29 abuts on the contact surface 26 between the side wall 21 of the box body 16 and the spread prevention projection 27.

Here, the cover 17 is twisted, or the cover 17 is moved in the direction D in FIG.
When the skirt portion 29 is excessively pressed, the skirt portion 29 tends to spread outward (direction E in FIG. 4), but does not spread outward because the movement is regulated by the spread prevention protrusion 27. Therefore, since the locking portion 32 does not come away from the hitting wall portion 22, the lock projection 23 does not come out of the locking hole 33, and the locking can be reliably performed.

Further, in this embodiment, the spread prevention projection 27 is provided on the contact wall portion 22 of the lock portion 36, so that more reliable locking is possible.

In the above embodiment, the contact surface 26 is provided near the lock portion 36 and the protrusion for preventing the spread of the contact surface 26 is provided. Thereby, the expansion of the side wall of the cover body can be prevented.

Further, in the present embodiment, the contact surface 26 of the box body 16 is provided and the side wall of the cover body 17 is abutted. However, the cover body 17 is provided with a contact surface and the side wall of the box body abuts. The present invention can also be applied to

[0027]

As described above, according to the first aspect of the present invention, when the cover is twisted or pressed,
Although the side wall of the cover body which is in contact with the contact surface tends to spread outward, the spread prevention projection provided on the contact surface restricts the movement of the side wall inside the lock projection. Therefore, the outward extension of the side wall of the cover body is restricted, so that reliable locking is possible.

According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and by pressing the operating portion toward the side wall of the cover body, the locking frame portion is centered on the supporting foot portion. , And the engagement state of the lock projection with the locking hole can be released.

[0029]

[Brief description of the drawings]

1 shows a lock of a box according to the invention,
3A is an exploded perspective view, and FIG. 3B shows an engaged state.
It is sectional drawing cut | disconnected along the b-Ib line.

FIG. 2 is a plan view showing a box body of the box according to the present invention.

FIG. 3 is a plan view showing a state where the box body is closed by a cover body of the box according to the present invention.

FIG. 4 is a front view showing a lock portion of the box.

FIG. 5 is a perspective view showing a conventional box.

FIG. 6 shows a conventional box and VI-VI in FIG. 5;
It is sectional drawing cut | disconnected along the line.

FIG. 7 is an exploded perspective view showing another conventional box.

FIG. 8 is a sectional view showing another conventional box.

[Explanation of symbols]

 15 Box 16 Box body 17 Cover body 25 Side wall 26 Contact surface 27 Spread prevention protrusion 36 Lock part

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 5/06 G02B 9/00 F16B 5/10 H01H 85/02 H01H 85/22

Claims (2)

(57) [Claims] 1. A box body, a cover body assembled to the box body to close one surface of the box body, and a lock portion engaged with each other when the box body and the cover body are assembled. A box having a flexible projection protruding from an outer peripheral surface of a side wall of the cover body.
And a locking hole formed integrally with the supporting foot
The locking part on the cover body side is formed with the locking frame part forming
And a projection protruding from the outer peripheral surface of the side wall of the box body.
Wall portion and the contact wall portion projecting outward from the
Lock projection on the lock part on the box body side that engages with the hole
And the end face of the side wall of the cover body provided on the contact wall portion
A contact surface abutting on an inner side of the lock projection;
Of the cover body projecting from the lock projection side of the
Has an anti-spreading projection to prevent the side wall from spreading out
Box characterized by doing. 2. The box according to claim 1, wherein said box is
The lock portion on the cover body side sandwiches the flexible support foot portion therebetween.
A box , wherein an operation part is formed on the opposite side of the locking frame part .