JPH11318017A - Wiring appliance facing plate and wiring appliance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring appliance facing plate whose manufacturing cost can be suppressed, and furthermore, which has very few appearance defects. SOLUTION: A wiring appliance facing plate has a plate main part which has one approximately square plate opening part 12 through which the front part of a wiring appliance provided on one surface side can be exposed to the other surface side to be usable at its approximately center part and has groove parts 11a which are formed on 1st imaginery lines which are in parallel with two facing opening edges of the plate opening 12 and a 2nd imaginery line which connects the ends of the 1st imaginery lines to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring device decorative plate and a wiring device used for mounting a wiring device on a wall or the like.

[0002]

2. Description of the Related Art Conventionally, a wiring plate decorative plate of this type shown in FIG. 1 is known. This wiring device decorative plate is provided with a substantially square plate opening 12 having a dimension that allows the front surface of the wiring device provided on one side to be exposed to the other surface while the wiring device is usable. And made of a resin such as ABS. As the forming method, an injection molding method or the like is generally used.

[0003] This injection molding method will be described. FIG. 4 is a sectional view showing the injection molding device. In the figure, reference numeral 41 denotes a base portion, and 42 denotes a movable portion. A fixed mold 43 is fixed to the base portion 41,
A movable mold 44 is fixed to the movable section 2. Movable part 42
Is movable in the direction of the arrow in the figure, and the fixed mold 43 and the movable mold 44 can be fitted. In this fitted state, the inner surfaces of these molds have the shape of, for example, a wiring appliance decorative plate. Reference numeral 45 denotes a nozzle for injecting the molding material into the fixed mold. Reference numeral 46 denotes a piece type which is a part of the fixed type 43 and is detachable so that the shape of a part of the fixed type 43 can be freely changed.

In the injection molding apparatus, a softened molding material is injected into the fixed mold 43 and the movable mold 44 in a state where the molds are fitted to each other, and then cooled to harden the molding material. ing. And mobile type 4
4 is detached from the fixed mold 43, and the molded wiring device decorative plate and the like are removed.

As described above, a part of the fixed mold 43 is
6, different types of molded products can be fixed
Can be performed without exchanging the whole, the mold cost can be reduced, and the manufacturing cost can be reduced. This is because the cost of manufacturing the mold can be kept lower as the mold becomes smaller.

[0006]

However, in the above-described injection molding apparatus, a slight step or gap is formed at the boundary between the bridge mold 46 and the other portion of the fixed mold 43, although this is slight. Shapes such as steps may appear on the surface of the molded product. Further, even if a shape such as a step is not formed, a portion formed in a portion of the fixed mold 43 having a step or the like may be formed with lower surface smoothness than other portions. As described above, when the surface of the molded article is not formed in a required state without a step or a rough portion, for example, an exposed article used such as a decorative plate of wiring equipment impairs aesthetic appearance. It becomes a problem.

An object of the present invention is to provide a wiring device decorative plate and a wiring device which can avoid the above-mentioned problems.

[0008]

According to a first aspect of the present invention, there is provided a wiring device decorative plate capable of exposing a front surface of a wiring device disposed on one surface to the other surface in a state where the wiring device can be used. A plate body in which at least one rectangular plate opening is provided substantially at the center;
A step formed on a first virtual line parallel to the two opening edges and on a second virtual line connecting the ends of the first virtual line.

The constituent elements of the present invention and those described in the following claims are defined as follows unless otherwise specified.

The plate body is generally formed of a resin, and various materials such as ABS can be used. The resin material may be a thermoplastic material or a thermosetting material.

The step does not need to have a sharp corner, but may be slightly rounded. Further, the step does not need to be formed over the entire length on the first virtual line and the second virtual line.

According to the present invention, a plurality of types of wiring equipment decorative plates can be used without changing the entire mold by using a piece mold as a part of the mold when the wiring equipment decorative plate is formed by the injection molding apparatus. It can be molded, the mold cost can be reduced, and the manufacturing cost can be reduced. And since the wiring equipment decorative plate itself has a step, in forming the wiring equipment decorative plate, a step should be provided so as to correspond to the boundary between the bridge mold and the other part of the mold. Thereby, unnecessary steps and gaps formed by the boundary between the bridge and the other parts of the mold can be made inconspicuous, and the surface can be compared with other parts formed by the boundary. Parts having different smoothness can also be made inconspicuous.

[0013] The wiring device decorative plate according to claim 2 is the wiring device decorative plate according to claim 1,
The step portion is characterized by forming a groove portion with another step portion.

According to the present invention, by providing a groove so as to correspond to the boundary between the bridge and the other part of the mold, it is possible to further reduce unnecessary steps, gaps or surface smoothness. Can be inconspicuous or eliminated.

According to a third aspect of the present invention, there is provided a wiring device, wherein the wiring device, a wiring device mounting frame having the wiring device fixed to an opening provided at the center, and a front portion of the wiring device are exposed from the plate opening. The wiring device decorative plate according to claim 1 or 2 attached to the wiring device mounting frame.

According to the present invention, an unnecessary step, gap or surface on the surface of the wiring device when the wiring device is mounted on a wall or the like by the action of the wiring device decorative plate according to claim 1 or 2. Can be made inconspicuous or can be eliminated.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view showing an embodiment of a wiring device decorative plate according to the present invention. FIG. 2 is a side view of the same. FIG. 3 is an exploded perspective view showing an embodiment of the wiring device of the present invention.

In FIG. 3, reference numeral 1 denotes a metal wiring device mounting frame, which has an opening 2 for mounting an electrical device, that is, a wiring device 20, in the center. At the upper and lower ends, mounting openings 6 corresponding to the mounting holes 45 of the wiring box 4 embedded in the wall surface 3 of the building material are provided, and plate mounting holes 7 are provided. The wiring device mounting frame 1 is provided with three sets of locking portions 8 on one side of the opening 2 to which locking pieces (not shown) projecting from both sides of the wiring device 20 are engaged. The wiring device mounting frame 1 may be one generally called a one-touch support.

The wiring device 20 is formed such that its outer diameter in the short direction is about one third of the longitudinal size of the opening 2 of the wiring device mounting frame 1.

The wiring device 20 has locking pieces on both sides of the front surface for engaging with the locking portions 8 of the wiring device mounting frame 1. These locking pieces can be formed integrally with a fitting for fixing the main body and the cover of the wiring device 20. Note that these wiring devices 20 are switches 20a.
And outlet 20b. The switch 20a has a swingable operation unit 22 on the front surface.

Reference numeral 11 denotes a decorative plate formed of a synthetic resin such as ABS, for example. The decorative plate 11 has a plate opening 12 facing the opening 2 of the wiring device mounting frame 1,
It is attached to the wiring device attachment frame 1.

The decorative plate 11 has grooves formed on lines extending two opposing edges of the plate opening 12, that is, on a line parallel to the opening edges and on a line connecting the ends of these lines. 11a is formed.
Each of these grooves 11a is constituted by two facing steps having different heights. Instead of the groove 11a, only one step may be provided. When only one step is provided, either the outer edge side or the center side of the decorative plate 11 may be formed higher. The plate 11 is attached to the wiring device attachment frame 1 by fitting the base plate 11C. The base plate 11C has a plate mounting hole 7
And a projection (not shown) that fits into the projection.

Here, a method of manufacturing the decorative plate 11 will be described with reference to FIG. The injection molding apparatus for molding the decorative plate 11 of the present embodiment is the same as the above-described conventionally used injection molding apparatus. First, in the injection molding apparatus shown in the figure, a piece mold 46 forming a part of the fixed mold 43 is attached to a predetermined position of the fixed mold 43. The bridge 46 is arbitrarily selected according to the type of the decorative plate 11 to be formed. When the bridge 46 is mounted on the main body of the fixed mold 43, the boundary between the bridge 46 of this mold and the other part of the fixed mold 43 is positioned so as to correspond to the groove 11a of the decorative plate 11. I have. Next, the movable die 44 is moved in the direction of the fixed die 43 by a driving device (not shown),
And the movable mold 44 are fitted. Next, the softened molding material is injected into these molds. And
By cooling the fixed mold 43 and the movable mold 44 in this state, the molding material is cooled and hardened. Next, the movable mold 44 is separated from the fixed mold 43, and the hardened decorative plate 11 is fixed to the movable mold 44 at this time. Finally, the decorative plate 11 is removed from the movable mold 44 by a detaching device (not shown) provided on the movable mold 44.

If the groove 11a is provided on a line obtained by extending two opposing opening edges of the plate opening 12 as in this embodiment, the area of the block mold 46 can be minimized, and The volume of the mold 46 is reduced, and the manufacturing cost can be extremely reduced.

An operation body 30 is mounted on the operation section 22 of the wiring device 20 and is formed so as to close the plate opening 12 of the plate 11.

Reference numeral 31 denotes a display window provided at a substantially central portion of the operating body 30. The display window 31 is provided from a display element (not shown) such as a neon lamp or a light emitting diode provided at a substantially central portion of the front surface of the wiring device 20. Light is guided to indicate one or both of the on and off states of the switch.

Reference numeral 32 denotes a screw which penetrates through the mounting opening 6 of the wiring device mounting frame 1 and fixes the same to the wiring box 4.

[0029]

According to the wiring device decorative plate according to the first aspect of the present invention, when the wiring device decorative plate is formed by the injection molding apparatus, a plurality of types of wiring device decorative plates can be used by using a piece mold as a part of the mold. The decorative plate can be formed without replacing the entire mold, and the mold cost can be reduced and the manufacturing cost can be reduced. And since the wiring equipment decorative plate itself has a step, in forming the wiring equipment decorative plate, a step should be provided so as to correspond to the boundary between the bridge mold and the other part of the mold. Thereby, unnecessary steps and gaps formed by the boundary between the bridge and the other parts of the mold can be made inconspicuous, and the surface can be compared with other parts formed by the boundary. Parts having different smoothness can also be made inconspicuous.

According to the decorative plate of the wiring device of the second aspect, by providing the groove so as to correspond to the boundary between the bridge and the other part of the mold, it is possible to further reduce unnecessary steps, gaps or the like. Portions having different surface smoothness can be made inconspicuous or eliminated.

According to the wiring device of the third aspect,
Due to the effect of the wiring device decorative plate according to claim 1 or 2, when the wiring device is mounted on a wall or the like, unnecessary steps on the surface of the wiring device, gaps or portions having different surface smoothness are conspicuous. None or can be eliminated.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a wiring device decorative plate according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an exploded perspective view showing one embodiment of the wiring device device of the present invention.

FIG. 4 is a sectional view showing an injection molding device.

[Explanation of symbols]

 20 Wiring device 11a Groove 12 Plate opening

Claims (3)

[Claims] 1. A plate provided with at least one substantially square plate opening at a substantially central portion capable of exposing a front surface of a wiring device provided on one surface side to the other surface while the wiring device is usable. A main body; and a step formed on a first imaginary line parallel to two opposite edges of the plate opening and on a second imaginary line connecting the ends of the first imaginary line. A wiring appliance decorative plate characterized by the above. 2. The wiring device decorative plate according to claim 1, wherein the step portion forms a groove portion with another step portion. A wiring device; a wiring device mounting frame in which the wiring device is fixed to an opening provided at the center; and a wiring device mounted on the wiring device mounting frame such that a front portion of the wiring device is exposed from the plate opening. A wiring device apparatus, comprising: the wiring device decorative plate according to claim 1.