JPS5847735Y2 - Fixing device for housing and cover - Google Patents

Description

[Detailed description of the invention] The present invention connects the housing and cover by fitting a protrusion provided on the housing of a device such as an electronic device to a through hole provided in a covering such as a cover or panel. The present invention relates to a fixing device for a housing and a cover.

To be more specific, a protrusion made by bending a rectangular plate and cutting both corners of the tip diagonally, and a through hole having a rectangular concave cutout at the opposite apex of the diamond shape are fitted into each other. It is.

Hereinafter, a case will be explained in which the object of the present invention is a cover as an example.

Conventionally, a method using protrusions and holes is generally used to fix the case and cover of the device, but the structure is as shown in the example in Fig. 1. A protruding body 4 made by combining a conical or pyramidal protruding metal piece 2 with an L-shaped metal piece 3 is attached, a round or square through hole 6 is provided in the cover 5 at a position where it fits with the protruding body 4, and the cover 5 is brought close to the housing 1, and the protruding hardware 2 and the through hole 6 are fitted and fixed.

Since the protruding hardware 2 in this structure is a cone or a pyramid, three-dimensional processing is required, and in order to attach it to the L-shaped hardware, a round hole must be drilled in the L-shaped hardware 3 and the L-shaped hardware 3 must be caulked. It takes a lot of man-hours, such as welding, so it can't be done cheaply.
If the processing method is poor, an accident may occur where the protrusion metal part 2 and the L-shaped metal part 3 fall off, and in the conventional fitting of the protrusion and the hole, it is necessary to fit both the horizontal and vertical directions of the cross section of the protrusion at the same time. However, there was a drawback in that reliability was reduced in terms of handling functions of the equipment.

The present invention eliminates these drawbacks and improves the handling function by integrating the protruding part and the mounting part of the hardware, making the protruding body tapered in the vertical direction, and the hole tapered in the horizontal direction. The present invention provides a fixing device for a housing and a cover.

Hereinafter, the present invention will be explained by way of examples with reference to the drawings.

A perspective view of an embodiment of the fixing device of the present invention is shown in FIG. 2a.

As shown in this figure, a rectangular hardware 7 is bent into a U-shape, a mounting hole 8 is provided in one end, and both corners 10 of the other end 9 are cut out.

Instead of the U-shape, the rectangular hardware 7 may be bent into a stepped shape as shown in the second figure.

Therefore, the tip 9 of the hardware 7 becomes a trapezoidal protrusion 11, which is screwed onto the housing 1 using the mounting hole 8.

On the other hand, at the position where the protrusion 11 of the casing is fitted, the thickness of the protrusion 11 is set as the width at two opposite apexes of the diamond shape, and the protrusion 11
A through hole 13 having a rectangular notch 12 with a width equal to the distance between both bottom surfaces is provided.

That is, if the protrusion 11 has a width a and a thickness b, as shown in FIG. 3, for example, the through hole 13 should be slightly larger than a, l) as shown in FIG.

Such a protrusion 11 has a taper in the vertical Y direction,
Since the through hole 13 has a taper in the horizontal X direction, when the protrusion 11 and the through hole 13 start to be connected, the tip 9 of the protrusion 11 is inside the diamond-shaped hole of the through hole 13, as shown in FIG. 5a. However, when the cover approaches the housing, the diamond-shaped edge of the through hole 13 moves the protrusion 11 in the horizontal X direction, and the protrusion 1
Both corners 10 of 1 move the housing and cover in the vertical Y direction, and when they are finally mated, the protrusion 11 is transparent at the part with the width, as shown in Figure 5. It fits into the square notch 12 above and below the hole 13, and extends in the horizontal X direction.

It is fixed without moving in the vertical Y direction.

Therefore, just by pressing the cover against the housing, the protrusion 11
is transparent (fits correctly into L13).

As explained above, according to the fixing device of the present invention, plate machining can be used instead of using protrusions that require three-dimensional machining such as cones or pyramids as in the past. Since the protrusion and the L-shaped mounting hardware are not required to be separately caulked or welded, the plate can be integrally machined, so the work is easy and inexpensive, and has high mechanical strength and fewer accidents. The casing and cover can be fixed.

Furthermore, instead of a three-dimensional fitting process as in conventional fixing devices, the fixing device of the present invention only requires horizontal and vertical planar movement between the two by pressing the cover against the housing 11, which has the advantage of ease of handling. .

In addition, the present invention can obtain the same effect even if the covering body is something like a decorative panel.

Further, it is sufficient that the through hole provided in the cover has the same cross-sectional shape as the protrusion, and a notch for guiding the protrusion is provided at the side edge thereof.

Therefore, in the embodiment of the present invention, the above-mentioned through hole is formed into a diamond shape by providing notches on both side edges, but the notch of the present invention is not limited to this and may be arc-shaped. Alternatively, only one side edge portion may be cut out.

As described above, the present invention provides a device in which a cover is connected to a housing, in which a plate-shaped protrusion that protrudes from the housing and has its tip cut off diagonally, and a predetermined position of the cover that corresponds to this protrusion. A through hole that matches the cross-sectional shape of the protrusion is provided, and the protrusion is inserted from the tip into the through hole at one or both of the side edges of the pair of through holes that correspond to the pair of surfaces of the protrusion. The present invention provides a fixing device for a housing and a cover in which a notch is formed to guide the protrusion toward the through hole as the protrusion is moved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an example of a conventional case and cover fixing structure, FIG. 2a is a perspective view of an embodiment of the case and cover fixing structure of the present invention, and FIG. FIG. 3 is a perspective view of the tip of the projection in the embodiment shown in FIG. 2, FIG. 4 is a plan view of the through hole of the cover, and FIG. FIG. 3 is a front view showing the state of fitting between the protrusion and the through hole in the embodiment of the present invention, where a shows the time when the fitting starts and b shows the time when the fitting ends. The symbols used in the drawings indicate the following. 1... Housing, 5... Covering, 9...
...Tip, 11...Protrusion, 13...
Notch, 12......through hole.

Claims (1)

[Scope of utility model registration request] A device in which a cover is coupled to a housing includes a plate-shaped protrusion that protrudes from the housing and has a tip cut off diagonally, and a protrusion that is drilled at a predetermined position of the cover that corresponds to the protrusion. As the protrusion is inserted from the tip into the through-hole, one or both of the side edges of the through-hole that match the cross-sectional shape of the through-hole and the pair of sides of the protrusion correspond to the pair of surfaces of the protrusion. A fixing device for a housing and a cover, comprising a notch for guiding the protrusion toward the through hole.