JPH0340029Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of wiring devices such as electrical outlets and switches that are installed so as to protrude from a wall surface or the like.

[Background technology] Conventionally, in wiring devices such as electrical outlets, the fourth
As shown in Figures a and b, the wood screw 18 is inserted and fixed through the wood screw hole 17 provided in the body 2, and the head of the wood screw 18 is placed in the counterbore hole 20 of the wood screw hole 17.
A rib 19' provided on the back side of the cover attached to the body 2 is inserted into the counterbore hole 20 at the position of the surface of the body 2.
It was compatible with some of the. In such a conventional example, although the rib 19' can prevent the wood screw 18 from falling off, there is no S ₁ between the rib 19' and the head of the wood screw 18.
There _{is a} gap of There was a drawback that there was a risk of contact and a ground fault.

[Purpose of the invention] The present invention has been made in view of the above points, and the purpose of the present invention is to prevent the wood screws from loosening and the installation to become unstable, and to make the connection between the wood screws and live parts. To provide an exposed type wiring device that does not come into contact with other people and is free from the risk of causing a ground fault.

[Disclosure of the Invention] The exposed wiring device of the present invention has a wood screw hole 17 in the body 2 for inserting the wood screw 18 to fix the body 2, and also inserts the head of the wood screw 18 into the wood screw hole 17 on the surface side of the body 2. A counterbore hole 20 is provided in which the cover member 1 is fitted, and a fitting rib 19 is provided on the back side of the cover body 1 that is attached to the body 2 to be fitted into the counterbore hole 20. This solves the shortcomings of the example. In other words, by fitting the fitting rib 19 into the counterbore hole 20, the head of the wood screw 18 is held down by the fitting rib 19, which prevents the wood screw 18 from loosening, and the installation does not become unstable. By fitting the fitting rib 19, there is no risk of contact between the wood screw 18 and the live part, and a ground fault is prevented.

The present invention will be explained in detail below with reference to Examples.

The body 2 is made of thermosetting resin, and has a first terminal plate 3, a second terminal plate 4, and a ground terminal plate 5 on the top surface.
are placed separately. The first terminal plate 3, the second terminal plate 4, and the ground terminal plate 5 each have a locking piece 15.
It is stopped by being locked in the locking recess 16 of the body 2. The first terminal plate 3 has a first blade receiving spring 3
a, and the first
A terminal screw 6 is screwed together. The second terminal plate 4 has a second blade receiving spring 4a, and the second terminal plate 4 has a washer 7.
A second terminal screw 7 is screwed through the terminal a. A first terminal is connected to the ground terminal plate 5 via a washer 8a and a washer 9a.
A ground terminal screw 8 and a second ground terminal screw 9 are screwed together. Wood screw holes 17 are drilled in the four corners of the body 2, and the wood screw holes 17 are drilled on the front side of the body 2.
A counterbore hole 20 is bored in the hole. In this embodiment, the counterbore holes 20 have an elliptical shape, and the long axis direction of the pair of counterbore holes 20 on one side and the pair of counterbore holes 20 on the other side are perpendicular to each other. The cover body 1 is composed of an inner cover 1a and a cosmetic outer cover 1b. The inner cover 1a is made of a thermosetting resin with excellent heat resistance, and is attached to the body 2 with mounting screws 10. A rectangular convex portion 11 is provided on the surface of the inner cover 1a.
A blade insertion hole 14 corresponding to the first blade receiving spring 3a and the second blade receiving spring 4a is bored in the convex surface portion 11. A fitting rib 19 is provided on the back side of the inner cover 1a to match the inner peripheral shape of the counterbore hole 20 so as to correspond to the counterbore hole 20 of the wood screw hole 17, and the fitting rib 19 fits into the inner circumferential shape of the counterbore hole 20 when the inner cover 1a is attached. Rib 19 is fitted into counterbore hole 20.
The fitting ribs 19 also have an elliptical cross section, and the long axis direction of the pair of fitting ribs 19 on one side intersects with the long axis direction of the pair of fitting ribs 19 on the other side. With this configuration, when attaching the inner cover 1a, the direction is clear and the inner cover 1a can be positioned accurately. The outer cover 1b is made of a thermoplastic resin with excellent impact resistance, and is fitted onto the inner cover 1a. At this time, the locking protrusion (not shown) provided on the outer cover 1b is inserted into the locking recess 1 of the inner cover 1a.
It is locked on 2. Inner cover 1 is attached to outer cover 1b.
A rectangular window portion 13 corresponding to the convex portion 11 of a is provided, and the convex portion 11 is exposed from the window portion 13. The exposed type wiring device is constructed in this manner, and is attached to the mounting base 22 on a wall or the like as follows. With the cover body 1 removed, the back side of the body 2 is brought into contact with the mounting base 22, and the wood screws 18 are inserted through the wood screw holes 17, and the wood screws 18 are screwed into the mounting base 22.
Fit the head of the head into the counterbore hole 20. Next, cover the body 2 with the inner cover 1a, fit the fitting rib 19 into the counterbore hole 20, and attach the inner cover 1 with the mounting screws 10.
a, and fit the outer cover 1b onto the inner cover 1a.

In the above embodiment, the inner cover 1a and the outer cover 1
Although the cover body 1 is constructed by making the inner cover 1a and the outer cover 1b separate from each other, the inner cover 1a and the outer cover 1b may be integrally molded at the same time.

[Effects of the invention] As described above, in this invention, a fitting rib that is fitted into a counterbore hole is provided on the back side of the cover body that is attached to the body, so the body can be attached by inserting a wood screw into the wood screw hole. By attaching the rear cover body and fitting the fitting rib into the counterbore hole, the head of the wood screw is held down, so there is no risk of the wood screw loosening, and the installation will not become unstable. When the ribs are inserted, the live parts do not come into contact with the wood screws, and there is no risk of ground faults occurring.

[Brief explanation of drawings]

Fig. 1 is a rear view of the inner cover of the cover body according to an embodiment of the present invention, Fig. 2 is an exploded perspective view showing the whole of the same, Fig. 3 is a sectional view of the main parts of the same, Fig. 4 a, b
1 is a schematic plan sectional view and a schematic front sectional view of a conventional example, in which 1 is a cover body, 2 is a body, 17 is a wood screw hole, 18 is a wood screw, 19 is a fitting rib, and 20 is a counterbore hole.

Claims (1)

[Scope of utility model registration request] A wood screw hole is provided in the body for inserting a wood screw to fix the body, and a counterbore hole is provided on the surface side of the body so that the head of the wood screw fits into the wood screw hole.
An exposed type wiring device that is provided with a fitting rib that is fitted into a counterbore hole on the back side of a cover that is attached to the body.