JP3221551B2 - Electrical equipment mounting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for suitably attaching a time switch and various other electric devices to holes in a panel.

[0002]

2. Description of the Related Art Some electric equipment such as a time switch includes a case having an open front surface and a lid attached to the front opening of the case. In order to mount the electric device in the hole of the panel, it is often pushed from the front of the hole to lock the locking piece formed at an appropriate position on the front opening edge of the case with the hole edge. In this mounting state, the rear surface of the flange formed so as to protrude outward on the front side of the lid comes into contact with the front surface of the edge of the hole. As the mutual attachment between the case and the lid, there is known a method in which a projection formed on a front opening edge of the case and an outer surface of the lid are engaged by uneven fitting.

[0003]

However, in the prior art, the lid is prevented from displacing in the rear direction by the contact of the flange with the panel. It should be noted that there is a problem to be solved in that if the device is inadvertently pulled from the back surface, a force acts on the concave / convex fitting portion, which is the attachment portion between the case and the lid. In particular, a problem arises especially when the front end of the bent piece attached to the rear surface of the case and formed on the side portion is provided with a mounting tool for pressing the rear surface of the panel to make the final mounting state. Cheap. This is because the reaction of the pressing force to the rear surface of the panel due to the bent piece of the mounting tool always acts as a force for displacing the case in the rear direction. In view of the problems to be solved, the present invention, as a device for attaching an electric device to a hole in a panel, prevents displacement of a case in the rear direction when a force is applied to the case to pull the case in the rear direction. It is an object of the present invention to prevent a force from acting on a concave / convex fitting portion which is a mounting portion between a case and a lid portion.

[0004]

SUMMARY OF THE INVENTION To summarize the present invention, there is provided an electric apparatus having a case with an open front, and a lid attached to the front opening of the case and having a flange portion extending outward on the front. A device for mounting in a hole in a panel,
A projecting piece partially formed on the front opening edge of the case and an outer surface of the lid are latched by uneven fitting, and a positioning projection formed outward at a front end of the projecting piece is formed of the flange. The back surface of the flange portion and the back surface of the positioning protrusion are formed substantially flush with each other by being fitted into the concave portion formed on the back surface, and the back surface of the flange portion and the back surface of the positioning protrusion are formed on the front surface of the hole edge of the panel. It is an electrical equipment mounting device substantially positioned and abutted.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described. However, these are merely exemplary embodiments adopted based on the present invention, and the present invention is limited to matters unique to only the embodiments. The technical scope of the present invention must be determined based on the matters stated in the claims or matters that are substantially equivalent thereto.

In the illustrated embodiment, a time switch including an elastic synthetic resin case 1 having an open front surface and a synthetic resin lid 2 attached to the front opening of the case 1 is provided with a time switch and a mounting portion. This is a device that can be suitably attached to the hole 4 of the panel 3. The protruding piece 5 formed on the front opening edge of the case 1 and the outer surface of the lid 2 are locked by concave and convex fitting. The concave-convex fitting is exemplified by a form in which a projection 6 formed on the outer surface of the lid 2 is fitted into a hole (may be a concave portion) 7 formed in an intermediate portion of the protruding piece 5. Of course, a hole (or a concave portion) may be formed on the outer surface of the lid portion 2, a protrusion corresponding to the intermediate portion of the projecting piece 5 may be formed, and these may be fitted. The rear face of the positioning projection 8 formed outward at the front end of the projection 5 is the panel 3.
Is positioned substantially in contact with the front surface of the edge of the hole 4.

More specifically, the projecting piece 5 is partially formed on the front opening edge of the case 1, and the positioning projection 8 is
On the front side of the flange portion 9 is fitted into a concave portion 10 formed on the back surface of the outwardly extending flange portion 9, and the back surface of the flange portion 9 and the back surface of the positioning projection 8 are formed substantially flush. As a result, the rear surface of the flange portion 9 substantially abuts the front surface of the panel 3 similarly to the rear surface of the positioning projection 8. A locking piece 11 locked to the edge of the hole 4 of the panel 3 is formed partially on the front opening edge of the case 1 independently of the protruding piece 5.
The locking piece 11 is formed in a substantially rectangular shape outward, and a plurality of ridges suitable for locking to the edge of the hole 4 of the panel 3 are formed on the outer surface on the front end side. . Further, there is provided a mounting member 14 which is attached to the rear surface of the case 1 by screws 12 or other appropriate means, and whose front end of a bent piece 13 formed on a side portion presses the rear surface of the panel 3.

A time switch mechanism comprising a motor and a number of gears is accommodated between the case 1 and the cover 2, and a dial mechanism is provided on the front of the cover 2.
Further, a transparent synthetic resin cover 15 which is locked to the outer edge of the flange portion 9 is detachably provided on the front surface of the lid portion 2 to protect the dial mechanism.

According to the present embodiment, the projecting piece 5 of the case 1 and the outer surface of the lid 2 are engaged with each other by the concave and convex fitting, whereby the case 1 and the lid 2 are assembled. In order to attach the locking piece 11 formed on the opening edge of the front face of the case 1
To the edge of. It is characterized in that a positioning projection 8 is formed outward at the front end by using a projection 5 used for assembling the case 1 and the lid 2, and the rear surface of the positioning projection 8 is Since it is substantially positioned and abutted on the front surface of the edge of the hole 4 of the panel 3, the case 1 is prevented from being displaced in the rear direction when a rearward pulling force is applied to the case 1. Thereby, an excessive force can be prevented from acting on the concave-convex fitting portion, and breakage when the concave-convex fitting portion has insufficient strength can be prevented. The positioning projection 8 is fitted into a concave portion 10 formed on the rear surface of the flange portion 9, and the rear surface of the flange portion 9 and the rear surface of the positioning projection 8 are formed substantially flush with each other. 8
Also substantially abuts the front surface of panel 3. Further, in the case where a force for pulling the case 1 in the rearward direction is always acting as a reaction of the pressing force to the rear surface of the panel 3 by the bent piece 13 of the fixture 14, the positioning projection 8 is formed.
This embodiment in which the displacement of the case 1 in the back direction due to the substantial contact between the panel 1 and the panel 3 is particularly effective.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same assembly.

FIG. 3 is a longitudinal sectional view showing a state where the panel is attached to a panel.

FIG. 4 is a cross-sectional view schematically showing a state in which the panel is attached to a panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Lid part 3 Panel 4 Hole 5 Projection piece 6 Projection 7 Hole 8 Positioning projection 9 Flange part 10 Concave part 11 Locking piece 13 Folding piece 14 Fixture

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 9/02 H01H 43/00

Claims (3)

(57) [Claims] 1. An apparatus for mounting an electric device having a case with an open front surface and a lid portion attached to the front opening of the case and having a flange portion extending outward on the front side to a hole of a panel, A projecting piece partially formed on the front opening edge of the case and an outer surface of the lid are latched by uneven fitting, and a positioning projection formed outward at a front end of the projecting piece is formed of the flange. The back surface of the flange portion and the back surface of the positioning protrusion are formed substantially flush with each other by being fitted into the concave portion formed on the back surface, and the back surface of the flange portion and the back surface of the positioning protrusion are formed on the front surface of the hole edge of the panel. An electrical device mounting device substantially positioned and abutted. 2. The electrical equipment mounting device according to claim 1, wherein a locking piece locked to an edge of the hole of the panel is partially formed on a front opening edge of the case independently of the projection. 3. The electrical equipment mounting device according to claim 1, further comprising: a mounting member mounted on the rear surface of the case and having a front end of a bent piece formed on a side portion pressing the rear surface of the panel.