JP2000276962A - Push button operation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use part of components in common with an operation unit having a cover fixed by attaching screws by providing an attaching screw fixing section provided with an attaching screw screwing means screwing the attaching screws into screw insertion sections formed on the side face of a screw-fitted cover and a lock face hooked by locking pawls locked on the inner side face of a pawl-locked cover on a main body base. SOLUTION: A fitting plate 12 and a fitting plate fixing screw, which are an attaching screw screwing means, are fitted to a base 4. A screw exposing window 4e with one end reaching the surface of the base 4 is formed on a short side face of the base 4 where lock recesses 4c are not formed, and a screw hole (attaching screw fixing section) 4d to be screwed with the fitting plate fixing screw is formed on the back face of the base 4 near the screw exposing window 4e. Lock lugs formed on one end of a cover are inserted into the lock recesses 4c of the base 4, and the other end side of the cover is covered on the base 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button operating device used for a call button or the like.

[0002]

2. Description of the Related Art An example of a push-button operating device used as a call button attached to a wall surface such as an entrance will be described with reference to FIGS. FIG. 12 is an external view of the push button operating device 1,
(A) is a plan view, (b) is a side view in the A direction, and (c) is a side view in the B direction. 13 is an exploded perspective view, FIG. 14 is a rear view, FIG. 15 is a view of the cover, (a) is a plan view, (b) is a side view in the A direction, and (c) is a side view in the B direction. FIG. 16 is a view of the handle, (a) is a plan view, (b) is a side view, and FIG. 17 is a plan view of an insulating mounting frame.

As shown in FIG. 13, a push button operating device 1 is connected to a bottomed box-shaped cover 2 having a substantially rectangular shape in plan view, a handle 3 serving as a push button, a switch (not shown), and the switch. A base 4 having terminals 4a, between the base 4 and a wall surface (mounting surface) which is fitted on the back side of the base 4 and to which the pushbutton operating device 1 is mounted, and between the mounting surface and the cover 2
And a substantially frame-shaped waterproof packing 5 interposed therebetween, and an insulating mounting frame 6 fixed to an opening (not shown) of a wall hole formed in the mounting surface.

[0004] At a substantially central portion of the bottom surface of the cover 2, a concave portion 2a into which the handle 3 is fitted is formed, and at one end of the bottom surface of the concave portion 2a, a handle exposure window 2b is formed. The handle 3 includes an operation portion 3a having a substantially rectangular shape in plan view having side walls in three directions, and a thin tongue piece 3b extending outward from an edge of the operation portion 3a where the side wall is not formed. Is formed.

In order to fix the handle 3 in combination with the cover 2, a mounting hole 3 c formed in a thin tongue piece 3 b of the handle 3 is provided with a projection 2 c protruding from the bottom of the recess 2 a of the cover 2.
And the portion of the projection 2c protruding from the mounting hole 3c is fixed by being thermally deformed. As a result, the handle 3 is in a cantilever state, and when a pressing operation is applied to the operation portion 3a of the handle 3 exposed from the handle exposure window 2b of the cover 2, the handle 3 moves to the inside of the push button operating device 1 and is pressed. When the operation is released, the handle 3 returns to the position at the time of the non-pressing operation by the elastic restoring force of the thin tongue piece 3b.

As shown in FIG. 13, on the back surface of the handle 3, there is provided a disc spring mechanism 7 for generating a good click feeling at the time of a pressing operation. It comprises a spring 8, a driving plate 9, and a disc spring lid 10 for fixing the disc spring 8 and the driving plate 9 to the handle 3. When a pressing operation is applied to the handle 3, a pressing force is transmitted to the drive plate 9 via a disc spring 8 abutting on the handle 3, and a protrusion 9 a protruding from the drive plate 9 is provided on a switch (not shown) provided on the base 4. ) Is pressed to output a signal from the terminal 4a. When a predetermined pressing force is applied to the handle 3 during this pressing operation, the disc spring 8 interposed between the handle 3 and the driving plate 9 is inverted, and a click feeling is generated.

As shown in FIGS. 13 and 17, the insulating mounting frame 6 is a substantially frame-shaped member having an opening 6a formed on the back side of the base 4 and facing the terminal 4a, and is fixed in the wall. A screw insertion hole 6b for fixing the wiring box to the opening of the wall hole where the wiring box is exposed is formed. A screw hole 6c into which a screw for fixing the base 4 to the insulating mounting frame 6 is screwed is provided.
The insulating mounting frame 6 is embedded at both ends in the longitudinal direction.
Further, a reinforcing metal rod 6d is embedded in the longitudinal direction.

Next, a method of mounting the push button operating device 1 will be described. The push-button operating device 1 shown in FIG. 13 is mounted so as to cover an opening of a substantially rectangular wall hole (not shown) formed in the mounting surface, but first, an insulating mounting is performed so as to cover the opening of the wall hole. After attaching the insulating mounting frame 6 to the wiring box with the screws inserted into the screw insertion holes 6b of the frame 6, the screws inserted into the screw insertion holes 4b of the base 4 are screwed into the screw holes 6c of the insulating mounting frame 6. Then, the base 4 to which the waterproof packing 5 is attached is fixed to the insulating attachment frame 6. Further, by attaching the cover 2 to which the handle 3 is attached to the base 4, the attachment of the push button operating device 1 is completed. First, a structure for attaching the cover 2 to the base 4 will be described.

As shown in FIG. 13, on the cover 2 side, a locking projection 2d is provided so as to project from the inner surface on one short side, and the other side of the cover 2 is provided on the other short side. A mounting screw insertion groove 2e opened in the direction of the opening is formed. On the other hand, a locking recess 4c shown in FIG. 13 is formed on one short side surface of the base 4, and a screw hole into which the mounting screw 11 is screwed is formed as shown in FIG. A screw hole 4d for fixing the provided mounting plate 12 to the base 4 is formed.

[0010] As shown in FIG.
Is a plate bent in a substantially rectangular shape, and has a screw hole 12a at one end for screwing the mounting screw 11, and an insertion hole 12b at the other end for inserting the mounting plate fixing screw 13.
The mounting plate fixing screw 13 is inserted through the insertion hole 12 b of the mounting plate 12, screwed into the screw hole 4 d of the base 4, the mounting plate 12 is mounted on the base 4, and the mounting screw 11 is partially mounted on the mounting plate 1.
It is screwed into the second screw hole 12a.

The cover 2 is assembled as described above, and the other end of the cover 2 is attached to the base 4 with the engaging projection 2d formed at one end of the cover 2 fitted in the engaging recess 4c of the base 4. Put on. Accordingly, the shaft portion of the mounting screw 11 is inserted into the mounting screw insertion groove 2 e of the cover 2, so that the mounting screw 11 can be further tightened to fix the cover 2 to the base 4.

[0012]

The push-button operating device 1 described above is a type for outdoor installation having a waterproof packing 5 and a type in which AC 100 V may be applied. In addition, the cover 2 cannot be easily removed without using a tool. The push button operating device 1 of the type in which the cover 2 is attached using the attachment screws 11 requires an operation of fixing the attachment plate 12 to the base 4 in manufacturing, and the like. There was a disadvantage that the parts cost was high. Also, since the package was packed with the cover 2 over the base 4 and the mounting screws 11 were tightened, at the time of construction, the mounting screws 11 were once loosened to remove the cover 2, and after the base 4 was mounted, the cover 2 was removed. The troublesome work of mounting with the mounting screws 11 again was necessary.

It is possible to divert such a pushbutton operating device of the type in which the cover is fixed with mounting screws as it is for indoor mounting, but the pushbutton operating device for indoor mounting is designed to mount the cover with screws. Since there is no need, there is a problem that the installation of the push button operating device for indoor installation is troublesome and requires extra cost and is expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to share some parts with a push-button operating device of a type in which a cover is fixed with mounting screws, thereby reducing costs and mounting work. It is an object of the present invention to provide a structure of a push-button operating device which can simplify the above.

[0015]

A push button operating device according to claim 1, wherein a handle as a main body of the push button operating device, a handle as a push button, and a handle exposure window having an opening and exposing an operating portion of the handle. And a box-shaped cover provided on the base, the mounting screw being screwed by a mounting screw inserted into a screw insertion portion formed on a side surface of the screw mounting cover. The base is provided with: a mounting screw fixing portion provided with a locking surface; and a locking surface formed on an inner surface of the claw locking cover, on which a locking claw is hooked.

According to a second aspect of the present invention, there is provided the push-button operating device according to the first aspect, wherein the notch having the cover-side pressing surface facing the opening in the cover is provided on the cover for claw engagement. Formed on the base, a base-side pressing surface that is exposed from the cutout portion and faces the bottom surface of the cover is formed, and the cover-side pressing surface and the base-side pressing surface include the cover-side pressing surface and the base-side pressing surface. The locking state between the locking surface of the base and the locking claw of the cover is released by applying an external force in a direction to widen a gap between the locking surface and the base side pressing surface. It is.

According to a third aspect of the present invention, there is provided the push button operating device according to the first aspect, wherein the handle is provided with a box-shaped operating portion having a substantially bottomed shape in a plan view and an outwardly extending upper end of the operating portion. A thin tongue piece is extended and attached to the bottom surface of the cover, and the entire bottom surface of the push button portion 16a protrudes from the handle exposure window formed on the substantially flat surface of the cover. And a flange portion for closing a gap between the handle exposure window and the operation portion at the time of non-pressing operation is formed on an outer peripheral portion of the operation portion.

According to a fourth aspect of the present invention, there is provided the push button operating device according to the first aspect, wherein the push button operating device is attached to an opening of a substantially rectangular wall hole formed in a mounting surface so as to cover the opening. The base is fixed to the mounting surface through a substantially rectangular mounting frame in a plan view, and the mounting frame is formed larger than the opening of the wall hole in the length direction and the width direction, and the mounting frame is , And four sides of an outer edge portion thereof are configured to contact an edge of the opening of the wall hole.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a push button operating device according to the present invention will be described with reference to FIGS. However, the same components as those shown in the conventional example are denoted by the same reference numerals. FIG. 1A is a rear view of the push button operating device 14, and FIG.
FIG. 3C is a cross-sectional view as viewed from the direction of the arrow, and FIG. 2 is an exploded perspective view, FIG. 3 is an enlarged view of a main part showing a locking structure of the cover and the base, FIG. 4 is a view of the base 2 with the mounting screw 11 attached, (a) is a perspective view, and (b) is FIG. 3 is a side view in the A direction, and FIG. 3C is a side view in the B direction. FIG. 5 is a rear view of the base to which the mounting screws 11 are mounted, and FIG. 6 is a plan view of the insulating mounting frame.

As shown in FIG. 2, the push button operating device 14 is connected to a box-shaped cover 15 having a substantially rectangular shape in a plan view, a handle 16 serving as a push button, a switch (not shown), and the switch. A base 4 having terminals 4a and an insulating mounting frame 17 are provided.

At a substantially central portion of the bottom surface of the cover 15, a handle exposure window 15 a having a substantially rectangular shape in a plan view is formed, and along one short side of the edge of the handle exposure window 15 a from the bottom surface of the cover 15. Three columnar projections 15c are provided upright.

On the other hand, as shown in FIG. 9, a handle 16 has a bottomed box-shaped operation portion 16a having an opening and an operation portion 1
6a, a thin tongue piece 1 extending outward from one end of the opening edge
6b are formed. A mounting hole 16c is formed in the tip of the thin tongue piece 16b. Further, a flange portion 16d extends outward from the opening edge of the operation portion 16a where the thin tongue piece 16b does not extend.

In the same manner as in the prior art, mounting holes 16c formed in the thin tongue piece 16b of the handle 16
5 is fitted into a projection 15c protruding from the bottom surface of the
The portion of the protrusion 15c protruding from the portion c is thermally deformed, and the handle 16 is fixed to the cover 15. As a result, the handle 16 is in a cantilever state, and the operating portion 16a of the handle 16 projects from the handle exposure window 15b of the cover 15 to the front side of the cover 15.

The handle 1 protruding from the front side of the cover 15
When a pressing operation is applied to the operation unit 16a of the handle 6, the handle 16
Moves to the inside of the push button operating device 14, but when the pressing operation is released, the handle 16 returns to the position at the time of the non-pressing operation by the elastic restoring force. Further, a disc spring mechanism 7 is provided on the bottom surface of the handle 16 in order to generate a good click feeling at the time of a pressing operation, but since the configuration is the same as that of the conventional example, detailed description will be omitted.

A comparison between the cover 2 used for the conventional pushbutton operating device for outdoor installation and the cover 15 shows that the handle exposure window 2b is provided at one end of the bottom surface of the concave portion 2a of the cover 2 in the pushbutton operating device for outdoor installation. The formed bottom portion of the concave portion 2a is configured to protect from rain when the push button operating device is mounted on a vertical mounting surface.
However, there is a drawback that when a quick pressing operation such as an emergency is required, or when both hands are occupied and the pressing operation is to be performed with an elbow or the like, the rain shield is obstructed.
In the case of an indoor push button operating device, since it is not necessary to provide a rain shield, a handle exposure window formed on the surface of a substantially flat cover 15 as shown in FIG. The entire upper surface of the push button portion 16a is configured to protrude from 15a. Accordingly, a quick pressing operation can be performed, and the pressing operation can be performed with an elbow or the like.

As shown in FIGS. 2 and 6, the insulating mounting frame 17 is a substantially frame-shaped member having an opening 17a formed on the back surface of the base 4 and facing the terminal 4a, and is fixed in the wall. A screw insertion hole 17b for fixing to a wiring box (not shown) exposed in a hole (wall hole) formed in the wall is formed. Screw holes 17c into which screws for fixing the base 4 to the insulating mounting frame 17 are screwed are formed at both ends in the longitudinal direction.

Referring to FIGS. 10 and 11, the insulating mounting frame 6 and the insulating mounting frame 17 shown in FIG. 17 will be compared. FIG.
FIG. 11 is an explanatory view showing a state in which the insulating mounting frame 6 is applied to the opening 18 of the wall hole, and FIG. 11 is an explanatory view showing a state in which the insulating mounting frame 17 is applied to the opening 18 of the wall hole. In FIGS. 10 and 11, the hatched portions indicate portions of the insulating mounting frame that come into contact with the edges of the wall surface to which the respective insulating mounting frames are mounted.
As shown in FIG. 10, the insulating mounting frame 6 is in contact with the edge of the opening 18 of the wall hole only at both ends in the longitudinal direction. The outer peripheral portion, which is formed larger than the opening 18 of the wall hole in the length direction and the width direction, is configured to contact the edge of the opening 18 of the wall hole at four sides of the outer edge portion. When the insulating mounting frame 6 is fixed to a wiring box (not shown) provided inside the wall by screws (not shown), the insulating mounting frame 6 is warped by tightening the screws, and the warping is caused by the tightening torque of the screws. Due to the degree of variation, the construction quality varies, and the base 4 cannot be mounted on the insulating mounting frame 6. On the other hand, the insulating mounting frame 17 is configured so as to abut against the edge of the opening 18 of the wall hole at four sides of the outer edge portion, so that the strength is high and the warpage is small, so that the variation in the construction quality is reduced. be able to. The insulating mounting frame 6 has two metal bars 6d embedded in the longitudinal direction for reinforcement, but the insulating mounting frame 17 does not need to be reinforced and does not require the metal rod 6d.
The cost can be reduced as compared with the case of (1). Furthermore, since the insulating mounting frame 17 has a larger opening 17a facing the terminal 4a than the insulating mounting frame 6, it has an advantage that the electric wires connected to the terminals 4a of the base 4 can be easily arranged.

The flange 16d extends from the outer peripheral portion (opening edge) of the operating portion 16a of the handle 16 to the edge of the handle exposure window 15a.
Exposure window 15a and operation part 1 appearing on the front side of
The gap with 6a is closed by the thin tongue piece 16b and the flange 16d during the non-pressing operation.

When the base 4 is mounted on a mounting screw 1 for outdoor mounting or the like.
When the cover 1 is used for a push button operation device of the type to which the cover 2 is attached, as shown in FIGS.
Then, the mounting plate fixing screw 13 and the mounting screw 11 are mounted on the base 4. As shown in FIG. 4, the base 4 has a screw exposed window 4 e having one end reaching the surface of the base 4 on a short side surface on which the locking concave portion 4 c is not formed. A screw hole 4d for screwing the mounting plate fixing screw 13 on the back surface of the base 4 (mounting screw fixing portion, see FIG. 12).
Are formed. If the mounting plate 12 is fixed to the base 4 as shown in FIG.
2a is configured to be exposed to the front side of the cover 2 via the screw exposure window 4e of the base 4 and the mounting screw insertion groove 2e of the cover 2.

As described above, the mounting plate 12 and the mounting plate fixing screw 1 serving as mounting screw screwing means are attached to the base 4.
The other end of the cover 2 is placed on the base 4 with the locking projection 2d formed on one end of the cover 2 fitted in the locking recess 4c of the base 4. As a result, the shaft portion of the mounting screw 11 is inserted into the mounting screw insertion groove 2e of the cover 2, and as shown in FIG.
The cover 2 is fixed to the base 4 by further tightening the mounting screws 11.

Next, a method of assembling a push button operating device using a cover 15 that is not fixed by mounting screws, such as for indoor mounting, will be described. In this case, the base 4 is used in a state where the mounting plate 12, the mounting plate fixing screws 13, and the mounting screws 11 are not mounted on the base 4. As shown in FIG.
As shown in FIG. 2, a locking projection 15 d is projected from the inner surface on one short side, and a locking projection 15 e (locking) is formed on the upper end of the inner surface on the other short side. Claw) is projected.

In order to attach the cover 15 to the base 4, the locking projection 15 d formed at one end of the cover 15 is fitted into the locking recess 4 c of the base 4, and
Cover 1 from the front side so that the other end of
Apply strength to 5. Thereby, the inclined surface 15f of the locking projection 15e hits the upper end of the side surface of the base 4, and the locking projection 15e
The side surface of the cover 15 provided with is bent outward, and the locking projection 1 is formed.
After 5e moves on the side surface of the base 4, the locking projection 15e is hooked on the back surface 4h (locking surface) of the base 4 and the cover 15 is fixed to the base 4, as shown in the sectional view of FIG.

Next, a method of removing the cover 15 from the base 4 will be described with reference to FIGS. As shown in the figure, the cover 15 is formed with a cutout portion 15g which is opened in the opening direction of the cover 15 at the place where the mounting screw insertion groove 2e of the cover 2 was formed. 8B, a part of the screw-exposed window 4e of the base 4 and the edge of the screw-exposed window 4e through the notch 15g, as shown in FIG.
4g (see FIG. 4) on the back side of the cover 15 is exposed in the side surface direction of the cover 15, and the opening 19 is newly formed by the notch 15g and the edge 4g. As shown in FIG. 8A, the tip of a flathead screwdriver is inserted into the opening 19 and rotated. Thereby, the tip of the flathead screwdriver faces the notch 15g in the opening direction of the cover 15 (cover-side pressing surface 15h).
And a surface (base-side pressing surface 4i) of the edge portion 4g facing the bottom surface of the cover 15, and the opening 19 is formed in those surfaces.
An external force is applied in the direction of pushing and spreading. As a result, a force in the direction of releasing the locked state acts between the locking projection 15e and the back surface of the base 4, and the cover 15 provided with the locking projection 15e.
Of the locking projection 15e slides on the back surface of the base 4, the locking state of the locking projection 15e on the back surface of the base 4 is released, and the locking projection 15e moves on the side surface of the base 4. Then, the cover 15 comes off the base 4.

[0034]

According to the pushbutton operating device of the first aspect, some parts can be shared with the pushbutton operating device of the type in which the cover is fixed with mounting screws, so that the cost can be reduced and the mounting operation can be simplified.

According to the push-button operating device of the second aspect, in addition to the effect of the push-button operating device of the first aspect, the cover can be easily removed using a flathead screwdriver, and the mounting operation can be simplified. Can be achieved.

Further, according to the push button operating device of the third aspect, in addition to the effect of the push button operating device of the first aspect, a quick pressing operation is possible, and the pressing operation can be performed with an elbow or the like. In addition, since the collar portion is provided, the color of the base is not seen from the gap between the cover and the handle, and the gap that gives a deep impression can be eliminated, so that the appearance can be improved.

According to the pushbutton operating device of the fourth aspect, in addition to the effect of the pushbutton operating device of the first aspect, the mounting strength of the insulating mounting frame can be increased, so that the warpage of the insulating mounting frame can be reduced. It is possible to suppress the variation in the construction quality and reduce the variation.

[Brief description of the drawings]

FIG. 1 is a view of a push button operating device of the present invention, (a) is a rear view,
(B) is an AA cross-sectional view as viewed in the direction of an arrow, and (c) is a plan view showing a front-side structure with a cover removed.

FIG. 2 is an exploded perspective view of the push button operating device of the present invention.

FIG. 3 is an enlarged view of a main part showing a locking structure of a cover and a base of the push button operating device of the present invention.

FIG. 4 is a view of the base 2 to which the mounting screws 11 are attached;
(A) is a perspective view, (b) is a side view in the A direction, and (c) is a side view in the B direction.

FIG. 5 is a rear view of the base to which the mounting screws 11 are attached.

FIG. 6 is a plan view of the insulating mounting frame.

FIG. 7 is an explanatory diagram for explaining a method of removing a cover.

8A and 8B are explanatory views for explaining a method of removing a cover, wherein FIG. 8A is a perspective view and FIG. 8B is a side view.

9 (a) is a plan view, and FIG. 9 (b) is a side view.

FIG. 10 is an explanatory diagram showing a state in which an insulating mounting frame 6 is applied to an opening of a wall hole.

FIG. 11 is an explanatory view showing a state in which an insulating mounting frame 17 is applied to an opening of a wall hole.

FIGS. 12A and 12B are external views of a push button operating device, wherein FIG.
(B) is a side view in the direction A, and (c) is a side view in the direction B.

FIG. 13 is an exploded perspective view of the push button operating device.

FIG. 14 is a rear view of the push button operating device.

15A and 15B are views of a cover, wherein FIG. 15A is a plan view and FIG.
(C) is a side view in the B direction.

16 (a) is a plan view, and FIG. 16 (b) is a side view.

FIG. 17 is a plan view of an insulating mounting frame.

[Explanation of symbols]

2e Mounting screw insertion groove (screw insertion part) 4 Base 4d Screw hole (mounting screw fixing part) 4h Back side (locking surface) 4i Base side pressing surface 5g Notch 11 Mounting screw 12 Mounting plate (mounting screw screwing means) 13 mounting plate fixing screw (mounting screw screwing means) 15 cover 15a handle exposure window 15e locking projection (locking claw) 15h cover side pressing surface 16 handle 16a operating portion 16b thin tongue piece 16d flange portion 17 insulating mounting frame ( Mounting frame) 18 Hole opening

Claims (4)

[Claims] 1. A box-shaped cover that covers the base, the base being a body of a push button operating device, a handle serving as a push button, and a handle exposure window having an opening and exposing an operating portion of the handle on a bottom surface. A push-button operating device comprising: a mounting screw fixing portion providing mounting screw screwing means for screwing a mounting screw inserted into a screw insertion portion formed on a side surface of the screw mounting cover; and a claw locking cover. A push button operating device, wherein the base comprises: a locking surface formed on an inner side surface of the locking surface and on which a locking claw is hooked. 2. A notch having a cover-side pressing surface facing the direction of the opening is formed in the claw locking cover, and the notch is exposed from the notch on the base and is formed on a bottom surface of the cover. An opposing base-side pressing surface is formed, and the cover-side pressing surface and the base-side pressing surface are applied with an external force in a direction that widens a clearance between the cover-side pressing surface and the base-side pressing surface, 2. The push-button operating device according to claim 1, wherein the locking state of the locking surface of the base and the locking claw of the cover is released. 3. The handle comprises: a box-shaped operation unit having a substantially bottomed shape in plan view; and a thin tongue piece extending outward from an upper end of an opening of the operation unit and attached to a bottom surface of the cover. The entire bottom surface of the push button portion 16a is configured to protrude from the handle exposure window formed on the substantially flat surface of the cover, and the handle exposure window and the operation portion are not operated during a non-pressing operation. 2. A push-button operation device according to claim 1, wherein a flange portion for closing the clearance is formed on an outer peripheral portion of said operation portion. 4. The base is attached to the mounting surface through a substantially rectangular mounting frame, which is mounted on the opening of the substantially rectangular wall hole formed in the mounting surface so as to cover the opening. The mounting frame is fixed to be larger than the opening of the wall hole in the length direction and the width direction, and the mounting frame contacts the edge of the opening of the wall hole at four sides of an outer edge portion thereof. The push-button operating device according to claim 1, wherein the push-button operating device is configured as follows.