JP2588968Y2 - Locking structure of lid for electrical connection 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 locking structure of a lid detachably attached to an electric connection box such as a junction block mounted on an automobile.

[0002]

2. Description of the Related Art Hitherto, various types of locking structures for a lid in a box for electrical connection have been used. For example, a perspective view of a box body with a cover shown in FIG. 5 and a partial cross-sectional view around a locking claw shown in FIG. 6 are known. As a first conventional lid, a lid 51 covers an upper portion of the box 2 as shown in FIG. In the lid 51,
A suitable number (one or more) of lock arms having a side wall 4 provided around the periphery of the covering wall 3 serving as a ceiling plate, and further having a locking claw 5 on the inner wall surface of the side wall 4 as shown in FIG. 52 are provided. Notches 6 are provided on both sides so that the lock arm 52 is easily bent outward. The locking claw 5 is adapted to engage with a rectangular hole-shaped locking portion 8 provided on the side of the box 2.

[0003] With the above structure, the lid 5 is placed on the box 2 from above.
In the case where 1 is mounted, the inclined surface of the locking claw 5 projecting inside the side wall 4 first comes into contact with the outer edge of the side wall of the box body 2.
When the lid 51 is further pressed downward, since the lid 51 is formed of an elastic material such as synthetic resin having a relatively small elastic modulus, the lock arm 52 having the notches 6 on both sides is bent outward. As a result, the locking claw 5 slides down on the outer surface of the side wall of the box 2 and is locked by the locking portion 8. Therefore, the lid 51 is mounted on the box 2 and locked. When removing the lid 51 from the box 2,
As shown in FIG. 6, when the locking claw 5 is squeezed outward from the diagonally lower part of the locking claw 5 using the jig T, the lock arm 52 bends outward. Locking claw 5 if pulled up
Since the lock between the lock member 8 and the locking portion 8 is released, the lid 51
Can be removed from the box 2.

Next, as a second conventional lid, a lid as shown in a perspective view of FIG. 7 is known. On the lid 54 mounted on the box 53, a side wall 56 is provided around the periphery of a covering wall 55 as a ceiling plate, and the edge of the side wall 4 is
Is in contact with A locking arm 57 having a fixed locking claw 57 projecting from an edge of one inner wall surface of the side wall 56 and a release lever 58 projecting outward is provided on the opposite side of the fixed locking claw 57. Have been. A notch 6 is formed in the side wall 56 on both sides of the lock arm 59 to leave the hinge 60 in order to make the lock arm 59 easily bend. Is protruding. The fixed locking claw 57 and the locking claw 5 are respectively engaged with claw portions (not shown) provided on the box 53, and the lid 54 is detachably attached to the box 53. To remove the lid 54, the fingertip applied to the release lever 58 is lifted in the direction of arrow F, and the lock arm 59 is elastically deformed by the hinge 60 to release the engagement between the locking claw 5 and the claw. , By lifting up the lid 54,
Can be removed from

Next, as a third conventional lid, there is known a perspective view shown in FIG. 8 and a partial sectional view of a main part shown in FIG. In the lid body 61, a side wall 63 is provided around the periphery of a covering wall 62 as a ceiling plate, and the covering wall 62 has an inclined wall 64 which becomes lower toward one side wall 63a.
Is provided. The side wall 63a has two notches 6
5a are provided, and the inclined wall 64 has a U-shaped notch 65b.
And a notch 65a and a notch 65b
A flexible hinge 66 is formed between the two. Inside the two notches 65a and the U-shaped notch 65b, a locking portion 67a substantially flush with the side wall 63a is provided.
A movable lock arm 67 which is constituted by an inclined wall 64 and an operation portion 67b substantially coplanar with each other and is rotatable around a flexible hinge 66 as a fulcrum is provided.

In FIG. 9, a wall 62a extends from a covering wall 62 along a U-shaped notch 65b.
Is provided with a stopper 68 at the end of. A locking claw 5 is provided on the inner wall surface of the locking portion 67a, and the locking claw 5 is engaged with a claw portion 69 provided on the upper end surface of the box body 53, so that the lid 61 is It is configured to be detachably attached to the body 53. Note that a finger hanging recess 70 is provided at a corner where the side wall 63 opposite to the side wall 63 a intersects with the covering wall 62. With the above configuration, to remove the lid 61 from the box 53, the user touches the operating portion 67 b of the movable lock arm 67 and the finger-holding concave portion 70 with the fingertip.
Pivots about the hinge portion 66 as a fulcrum, the end of the operation portion 67b abuts against the stopper 68, and the locking claw 5 of the locking portion 67a is disengaged from the claw portion 69 of the box body 53 to engage the lid 61. When the fingertip is lifted, the lid 61 is released.
Can be removed from the box 53.

[0007]

In the above conventional locking structure of the lid, in the first lid structure, the lid 51 is connected to the box 2.
There is a problem that it is necessary to prepare a jig T for releasing the lock in order to remove the jig T. Further, when covering with a trim cover or the like in order to protect the electric wires and the like connected to the box body 2, it is necessary to make a large notch to take a space for operating the jig T. For this reason, not only does the appearance deteriorate, but also there is a problem that there is a danger that foreign matter that damages built-in components such as electric wires may enter. Next, in the second lid structure,
Since the release lever 58 for releasing the lock projects greatly outward, not only there is a problem that the mounting space becomes large, but also when an unintended force is applied to something, the lock is released. There is also a problem.

Further, in the third lid structure, the operation portion 67b of the movable lock arm 67 is rotated inside the lid 61, and the stopper 68, the wall body 62a supporting the stopper, and the finger-holding recess are provided. Since 70 and 70 protrude into the inside of the lid 61, there is a problem that the height of the lid 61 becomes large and the mounting space also becomes large in order not to interfere with the built-in components. In view of the above-mentioned conventional problems, the present invention does not require an unlocking jig, does not require a large mounting space, does not have the risk of unintentional unlocking, and does not need to have a large trim cover. An object of the present invention is to provide a locking structure for a lid.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cover made of an elastic material, wherein a side wall is provided around the periphery of a covering wall, an inner wall of the side wall is provided with a locking claw, and notches are provided on both sides. Lock having
In the locking structure of the lid, which is locked by the locking portion provided on the box body side by the arm, an outer inclined portion is provided below the lock arm.
The extension is extended downward so that the
Characterized by the fact that an inclined surface is formed which is inclined toward
This can be achieved by the locking structure of the lid in the connection box . Further, the above object of the present invention is the above-mentioned electric connection.
In the locking structure of the lid in the box, a guide groove extending vertically along the inner surface of the extension portion is provided, and a projection that engages with the guide groove is provided on the locking portion on the box side. Of the lid in the electrical connection box
This can be achieved by a stop structure .

[0010]

In the locking structure of the lid of the electric connection box according to the present invention , the outer side of the lid is obliquely below the lock arm.
The extension is extended in the direction of
When the lid is put on the box due to the formation of the inclined surface , if the lid is placed from above the box, the lid will be locked first.
When the lid is further pressed from above after the inclined surface of the arm contacts the upper end of the box, the lid is deeply engaged with the box because the lock arm is bent outward. Therefore, since the locking claw is locked by the locking portion provided on the box, the lid is locked and mounted on the box. Also, when removing the lid from the box, if the tip of the extension of the lock arm is hooked up from below and lifted up, the lock arm bends outward and the locking claw also moves outward. The lock between the locking portion of the body and the locking claw is released. Therefore, the lid can be removed from the box simply by pulling up the extension hooked by the fingertip. Further, in the case where a plurality of lock arms are provided , for example, in a pair on the side wall surface facing the lid, when the lid is attached to the box, the lid is moved along the center line of the box by the inclined surface of the lock arm. It is mounted while being positioned left and right.

[0011] Next, before Symbol a stretched guide groove vertically provided along the extension inner surface, by providing a protrusion to be engaged with the guide groove in the locking portion of the box side, said guide grooves By being guided by the projections of the locking portions provided on the box, the lid is mounted on the box while being positioned in the left , right, front and rear directions.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a lid 1 made of a synthetic resin or the like is mounted on the box 2 so as to cover it. Wherein the lid member 1 and the covering wall 3 is provided as a ceiling panel, this is the periphery of the covering wall 3 is the side wall 4 is circumferentially, the side wall 4 facing
The locking claw 5 is provided on the inner wall surface of the
The lock arm 7 having the notch 6
A pair is provided.

Then, as shown in FIG. 1 and FIG.
Locking arm 7 lower and extension 9 to the outside obliquely downward extended in the inner surface of the extended length portion 9 inclined surface 10 of the lower side outward is formed. When the cover 1 is placed on the box 2 from above, the inclined surface 10 has a function of sliding the lock arm 7 on the outer surface of the side wall of the box 2 to smoothly engage the locking portion 8. In order to further facilitate this operation, the inner surface from the locking claw 5 to the extension 9 may be formed as an arcuate inclined surface 11 as shown in FIG. And the above
A locking claw 5 having a square hole-shaped locking portion 8 provided on a side wall of the box 2
, The lid 1 is locked to the box 2
It has become .

According to the above configuration, in order to cover and lock the lid 1 on the box 2, when the lid 1 is lowered from above the box 2, the inclined surface 10 inside the extension portion 9 is first raised. It is in contact with the upper end surface of the side wall of the body 2. Further, when the lid 1 is strongly pressed downward, the inclined surface 10 slides on the upper end surface of the side wall of the box 2, so that the lock arm 7 is bent outward.
The locking claw 5 is moved while sliding downward on the outer surface of the side wall of the box 2, and is eventually engaged with the locking portion 8. Accordingly, the bending of the lock arm 7 returns to the original state, and the lower surface of the covering wall 3 of the lid 1 abuts on the upper end surface of the side wall of the box 2, and the lid 1 is attached to the box 2 and Locked.

As shown in FIG. 3, the box 2 of the lid 1
In the process of attachment to the device, it is provided with a locking claw 5 and an extension 9
If a pair of lock arms 7 are provided on the left and right side walls 4 of the lid 1 facing each other, for example, the inclined surface 10 functions to align the center line of the lid 1 with the center line of the box 2, that is, the left and right sides. It also has the function of positioning in the direction. Next, in order to remove the locked lid 1 from the box 2, first pull the upper end of the extension 9 from below by pulling it with a fingertip, and the lock arm 7 bends outward. Since the claw 5 is removed from the locking portion 8, the lock between the lid 1 and the box 2 is released. Thereafter, if the extension 9 hooked by the fingertip is pulled up as it is, the lid 1 can be removed from the box 2.

FIG. 4 shows a second embodiment of the present invention . FIG.
FIG. 4A is a partial cross-sectional view showing the locking structure of the present embodiment, and FIG.
FIG. 5B is a view as viewed from the direction of the arrow in FIG.
The difference from the first embodiment is that a guide groove 12 is provided in the vertical direction along the inclined surface 10 and a projection 13 that engages with the guide groove 12 is provided on the locking portion 8. It is to be . The same components of the same operating purposes omitted by referring to the reference numerals. The operation when the lid 1 is mounted on the box 2 is, for example, as shown in FIG. 3, a pair of locking claws 5 and extension portions 9 are provided on the left and right side walls 4 facing each other. In the case, when the lid 1 is mounted on the box 2 from above, the action of the inclined surface 10 of the left and right extension 9 causes the
The positioning of the lid 1 in the left-right direction is performed in the same manner as in the first embodiment. However, in the second embodiment, the guide grooves 12 provided on the inclined surface 10 Since it is guided by the projection 13 provided on the front side 8, positioning in the front-rear direction is also performed.

In any of the first and second embodiments, a jig is used to remove the lid 1 locked to the box 2 by the locking claws 5 and the locking portions 8. Without releasing the lock and removing the work at the same time with a single action of hooking the fingertip on the extension 9 and pulling it up, the work efficiency is improved. In addition, the extension 9 projecting obliquely outward and downward is not only small, but also there is no large projection inside the lid 1, so that the mounting space can be reduced. Further, since the extension portion 9 is provided at the back of the lid 1, that is, below the cover in FIGS. 1 and 3, it may be inadvertently locked by hitting a flying foreign object or touching the hand by mistake. Is not likely to be released, thereby improving reliability. And box 2
For example, when used as a junction block for connecting electric wires, a trim cover for protecting the electric wires may be provided. However, since the extension of the extension portion 9 to the outside is minimal, the cover 1 It is not necessary to make the notch of the trim cover large for mounting / removing operation. Therefore, not only the appearance is smart, but also there is little risk of damaging the electric wire due to the foreign matter coming in, and the reliability can be improved.

Further, when the guide groove 12 and the projection 13 are provided as shown in FIG. 4, the insertion fitting property when the lid 1 is mounted is improved. Note that the present invention is not limited to the above-described embodiment, but can be implemented in modes other than the above by making appropriate changes.

[0019]

[Effect of the Invention] As described above, the electrical connection of the present invention
According to the locking structure of the lid in the box , the lock arm
Of that extension outward obliquely downward it is extended downward, the inner
Since a slope inclined outward and downward is formed on the surface side ,
When the lid is removed from the box, the lock can be released and removed with the same action of hooking the lower end of the extension with the fingertip and pulling it up, so no jig is required and the work efficiency is greatly improved. Can be. Also, along the inner surface of the extension
Provide a guide groove extending downward and engage with this guide groove.
That the projections of the features in the locking portion of the box side lever, since the lid is a work of positioning when mounted on the box, it is possible to significantly improve the insertion fittability. Further, since the extension portion works sufficiently by slightly projecting from the side wall of the lid, the installation volume of the entire box and the lid is small,
Installation space is small. Furthermore, since the extension is provided below the side wall away from the covering wall of the lid ceiling, there is no risk of the lock being unintentionally released due to foreign matter, and the reliability is greatly improved. .

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a locking structure of a lid according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view showing a locking structure in FIG.

FIG. 3 is a longitudinal sectional view including a locking structure in FIG. 1;

FIG. 4 is a partial sectional view of a main part according to a second embodiment of the present invention.

FIG. 5 is an overall perspective view showing a conventional lid locking structure.

FIG. 6 is a partial sectional view showing the locking structure in FIG.

FIG. 7 is an external perspective view of a lid showing another conventional example.

FIG. 8 is an external perspective view of a lid showing still another conventional example.

FIG. 9 is a partial sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid 2 Box 3 Covering wall 4 Side wall 5 Locking claw 7 Lock arm 8 Locking part 9 Extension 10 Slope 12 Guide groove 13 Projection 51,54,61 Lid 53 Box 55,62 Coated wall 56, 63, 63a Side wall 57 Fixed locking claw 58 Release lever 59 Lock arm 60, 66 Hinge part 67 Movable lock arm 67a Locking part 67b Operating part 69 Claw part 70 Finger holding recess T Jig

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-9217 (JP, U) JP-A-2-1455783 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) H02G 3/14 H02G 3/08

Claims (2)

(57) [Scope of request for utility model registration] 1. A side wall is provided around a peripheral edge of a covering wall of a lid made of an elastic material, a locking claw is provided on an inner wall surface of the side wall , and notches are provided on both sides.
In the locking structure of the lid which engaged with an engaging portion provided on the box side by a locking arm having come, the Rokkua
By extending the extension diagonally outward and downward below the system ,
A structure for locking a lid in an electric connection box, wherein an inclined surface inclined downward and outward is formed on an inner surface side . 2. A guide groove extending in the vertical direction along the inner surface of the extension, and a projection engaging with the guide groove is provided on the locking portion on the box body side. Claim
Item 4. A structure for locking a lid in an electric connection box according to Item 1 .