JPH0121582Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a housing-like cover attachment/detachment device for a housing for electrical equipment or electronic equipment.

2. Description of the Related Art Conventionally, a housing cover for a housing for electrical equipment or electronic equipment is attached to a housing chassis using screws or the like. In order to fasten with a screw, the screw itself must be formed into a shape suitable for attachment and detachment.
The structure of the attachment/detachment device is complicated and requires a tool such as a screwdriver, making its operation cumbersome. Therefore, in order to eliminate the above-mentioned drawbacks, the present invention has been developed to lock the locking wall of the housing cover that is engaged with the engagement hole in the side wall of the housing chassis by pressing a push button protruding from the front wall of the housing cover. It was designed so that it would leave. Note that attachment and detachment of the housing cover from the housing chassis is necessary for purposes such as replacing the battery housed in the housing chassis and inspecting electronic components.

Hereinafter, the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.

An electronic circuit board on which resistors, capacitors, coils, etc. are arranged is attached to a housing-like chassis 1 formed by bending a thin metal plate. A housing-like cover 2 made of synthetic resin having appropriate elasticity is fitted onto the housing-like chassis 1 with its opening facing the opening of the housing-like chassis 1.

The opposing short side side walls 3 of the chassis 1 are
Separate the side that connects to the long side to make it easier to move.
The tip of the side wall 3 is bent outward to facilitate fitting with the housing cover 2, and a square engagement hole 4 is bored in the middle.

A side wall 5 is provided on the inside of the side wall 5 of the housing cover 2 located outside the side wall 3 so as to be in contact with the inner surface of the side wall 3.
A lock wall 6 is suspended in parallel to the. A protrusion 7 that engages with the engagement hole 4 is provided on the outer surface of the tip of the lock wall 6, and a vertical cross section with the middle portion protruding most outwardly on both sides of the passage through which the housing-like chassis side wall 3 on the outer surface of the lock wall 6 advances and retreats. causes the triangular convex portion 8 to bulge out. Furthermore, the convex portion 8 may have a semicircular arc shape. The housing-like chassis side wall 3 on the outer surface of the lock wall 6 formed in this way
The advancing/retreating path portion is flat and has a protrusion 7 at its lower end, and convex portions 8 on both sides of this plane, and these form a shape mechanism convenient for molding with a mold.

On the front wall of the casing cover 2, there are side walls 5 and lock walls 6.
A square guide hole 11 is bored between the two.
The size of the guide hole 11 is set so that one side is shorter than the distance between the side wall 5 and the lock wall 6, and the other side is set to have a length equal to or more than the width of the lock wall 6. Since this guide hole 11 exists between the side wall 5 of the housing cover 2 and the lock wall 6, it is easy to form the protrusion 8 and the protrusion 7 on the outer surface of the lock wall 6 using the upper and lower split mold. It becomes possible.

When the housing cover 2 is fitted onto the housing chassis 1, the housing chassis 1 is accommodated within the housing cover 2. That is, when the housing cover 2 is externally fitted onto the housing chassis 1, the upper end of the long side wall of the housing chassis 1 is in contact with the inner surface of the front wall of the housing cover 2, and the height of the side wall 3 of the housing chassis 1 is is the side wall 5 of the housing cover 2
The bent end portion of the side wall 3 is located below the convex portion 8 so as not to interfere, and the upper portion of the engagement hole 4 is set to face the protrusion 7.

A push button 10 is accommodated between the lock wall 6 and the side wall 5 of the housing cover 2, and has an L-shaped cross-sectional engagement protrusion 9 on the lower side and spans both protrusions 8 in the width direction. 8 to make it protrude from the guide hole 11 formed in the front wall of the casing-like cover 2. Note that the outer surface of the engaging protrusion 9 is brought into contact with the inner surface of the side wall 5. push button 10
The lower part of the outer surface of the lock wall 6 is formed into a slight slope so that it can be easily lowered when the head of the lock wall 6 is pushed down.

Further, when the housing cover 2 is externally fitted onto the housing chassis 1, the upper end of the long side wall is brought into contact with the inner surface of the front wall of the housing cover 2, and the housing chassis 1 and the housing cover 2 are fitted together.
Positioning is performed in the height direction. That is,
When the upper end of the long side wall of the housing chassis 1 comes into contact with the inner surface of the front wall of the housing cover 2, the housing chassis 1 will not enter the housing cover 2 any further.

To attach the housing cover 2 to the housing chassis 1, first, the push button 10 is accommodated between the side wall 5 and the lock wall 6 of the housing cover 2, and is fitted into the guide hole 11 and placed on the front wall of the housing cover 2. When the housing cover 2 is projected and held on the upper part of the convex portion 8, and then the housing cover 2 is fitted onto the housing chassis 1, the protrusion 7 at the tip of the locking wall 6 of the housing cover 2 touches the side wall 3 of the housing chassis 1. It slides down on the inner surface and enters and engages the engagement hole 4, thereby fitting the housing cover 2 to the housing chassis 1 (see FIG. 5).

To remove the housing cover 2 from the housing chassis 1, press the push button 1 protruding from the front wall of the housing cover 2.
0, the lower end of the engagement protrusion 9 of the push button 10 rides on the protrusion 8 of the lock wall 6, and as shown in FIG. 6, the tip of the lock wall 6 moves inward to engage the protrusion 7. The housing cover 2 is removed by removing it from the hole 4.

After the housing cover 2 is removed from the housing chassis 1,
When the pressing force of the push button 10 is released, the lock wall 6, whose tip had moved inward, returns to a vertical position due to its elasticity, and the head of the push button 10 is pushed back upward by the convex portion 8, and the top of the housing cover 2 is pushed back upwards by the convex portion 8. It protrudes onto the wall and remains in that state.

Although the example of the case-like chassis and the case-like cover has been described above, the present invention can be implemented in exactly the same way with a general case-like container and cover.

It can also be used to lock hinge-type lid opening/closing doors in storage boxes housing electronic equipment, distribution boards, etc.

As described above, the present invention enables attachment and detachment of the housing cover to the housing chassis by pushing the locking wall of the housing cover, which is engaged with the engagement hole of the side wall of the housing chassis, through a pushbutton protruding from the front wall of the housing cover. Since the engagement can be released by pressing , the attachment/detachment device can be simplified without the need for special screws to attach or detach the housing cover to the housing chassis, and there is no need for any tools such as a screwdriver. It is extremely easy to operate by simply pressing down on the push button, and can be removed reliably, and can be reliably attached by engaging the protrusion at the tip of the lock wall with the engagement hole. Further, since the side wall of the housing-like chassis of the present invention advances and retreats between the protrusions on the outer surface of the lock wall of the housing-like cover, it is guided by both protrusions and slides smoothly. In addition, since the push button is disposed across both convex portions, the lock wall can be moved easily and smoothly, and the push button stably projects onto the front wall of the casing-like cover, with no wobbling or the like.

[Brief explanation of the drawing]

The drawings show a specific embodiment of the present invention; FIG. 1 is a perspective view of the housing-like cover, FIG. 2 is a perspective view of the housing-like chassis, FIG. 3 is a perspective view of the lock wall of the housing-like cover, and FIG. Figure 4 is a perspective view of the push button, Figure 5 is a vertical sectional view of the main part with the housing cover attached to the housing chassis, and Figure 6 is a longitudinal sectional view of the main part with the housing cover removed from the housing chassis. Show the front view. 1... Housing-shaped chassis, 2... Housing-shaped cover, 3...
...Side wall of casing chassis, 4...Engagement hole, 6...Lock wall, 7...Protrusion, 8...Protrusion, 5...Side wall of casing cover, 9...Engagement protrusion, 10... …push button.

Claims (1)

[Scope of utility model registration request] In a case in which a housing chassis and a housing cover have their respective openings facing each other and the housing cover is externally fitted into the housing chassis, an engagement hole is formed in a side wall of the housing chassis and contacts the inner surface of the side wall. A lock wall is suspended from the housing-like cover, a protrusion that engages with the engagement hole is provided on the outer surface of the tip of the lock wall, and convex portions are bulged on both sides of the protrusion on the outer surface of the lock wall, and the lock wall is suspended from the housing-like cover. A casing characterized in that a push button having an engaging protrusion is housed between a lock wall and a side wall of the cover, and is held in place by the protrusion so as to protrude onto the front wall of the casing-like cover. Housing cover attachment/detachment device.