JPH07235973A - Pushbutton device for interphone - Google Patents

Abstract

PURPOSE:To improve the feeling of a pushbutton operation and surely perform the operation by making a light-emitting body incorporated in a pushbutton body emit light by supplying electricity to a printed circuit board and depressing a switch by the use of a switch depressing part. CONSTITUTION:The pushbutton body 2 is a member formed so as to be inserted to and extracted from the inside of an interphone A, and it is formed with resin and in almost cylindrical phase. A pushbutton cover 1 is loaded on the front plane 2a of the main body 2, and a projection 2c which fixes a fixing plate is provided at the rear plane 2b. In such a case, when the pushbutton cover 1 is depressed with the finger, an elastic body 3 is compressed between the pushbutton main body 2 and the cover 10 of the interphone A, and the pushbutton main body 2 is inserted to the inside of the interphone A, consequently, the fixing plate 4 formed integrally with the pushbutton body 2 is moved to the rear side. The switch depressing part 5 on the back plane depresses the switch 12 packaged on a main printed circuit board 11 along with the movement of the fixing plate 4, thus, the switch 12 is operated. Also, when it is requested to issue an alarm, the emitting body 6 is turned on, and light is reflected by the internal plane of the body 2 and it is emitted via the cover 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button device for an intercom having an alarm display.

[0002]

2. Description of the Related Art Conventionally, there is a push button device of an intercom such as an intercom subunit which is provided with an alarm display for indicating an alarm state. As shown in FIG. 3, this is a resin push button cover 1 formed of a see-through material, a roughly cylindrical push button body 2 on which the push button cover 1 is mounted on the front surface, and a push button body 2 wound around the outer edge thereof. The elastic body 3 such as a spring to be mounted, the push button body 2 is sandwiched between the cover 10 of the intercom via the elastic body 3, and the fixed plate 4 having the switch pushing portion 5 on the back surface is also incorporated in the push button body 2. And a light-emitting body 6. The light-emitting body 6 is formed of an LED or the like, and is mounted on the main printed circuit board 11 of the intercom.
By extending the D connecting foot 6a, the push button body 2 is built in so as to be movable substantially at the center thereof. Also, push button body 2
The switch pushing portion 5 is located at the rear end portion of the fixed plate 4, and when the push button cover 1 is pushed, the switch pushing portion 5 pushes the switch 12 mounted on the main printed circuit board 11.

[0003]

In the conventional push button device of the intercom as described above, since the LED, which is the light emitting body mounted on the main printed circuit board, is located in the central portion of the push button main body, the switch is pushed. Since it cannot be installed in the central portion and the axis line for operating the push button device is deviated from the axis line for driving the switch, the feel of the push button operation is not good. In particular, when the four corners of the push button cover were pressed, the feeling was not good, and there was a case where an erroneous operation was performed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an intercom push button device with an alarm display, which has a good feel of the push button operation and less erroneous operation.

[0005]

In order to solve such a problem, a push button device for an intercom according to claim 1 has a push button cover made of a see-through material and a generally cylindrical shape for mounting the push button cover on the front surface. Of the push button body, an elastic body wound around the outer edge of the push button body, a fixed plate having a switch pushing portion that pushes the switch on the back surface while sandwiching the push button body with the interphone cover via the elastic body, and the push button In a push button device for an intercom, which comprises a light emitting body built in the main body, while mounting the light emitting body on a printed circuit board,
The printed circuit board is sandwiched between the push button body and the fixed plate.

According to a second aspect of the push button device of the intercom of the present invention, the switch pushing portion of the fixed plate according to the first aspect is provided in the central portion of the push button device.

[0007]

According to the structure of the present invention, since the light emitting body built in the push button body emits light by supplying electricity to the printed circuit board, a part of the light emitting body projects on the back surface of the fixing plate. Therefore, the switch pressing portion can be installed at an arbitrary position, and the switch is surely pressed by the switch pressing portion.

According to the second aspect of the invention, in addition to the operation of the first aspect, the switch can be pushed by the switch pushing portion provided at the central portion of the push button device, and the push button device can be operated. The axis of and the axis of the drive of the switch coincide.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Members having the same basic functions as those described in the conventional example are designated by the same reference numerals.

Reference numeral 1 denotes a push button cover, which is a place where a push button device is operated with a finger, and which is made of a transparent resin material,
It is formed in a cylindrical shape with a bottom.

Reference numeral 2 denotes a push button body, which is a member that can enter and leave the interior of the intercom A, and is formed of resin in a substantially cylindrical shape. The push button cover 1 is mounted on the front surface 2a of the push button body 2, and the rear surface 2b has a protrusion 2c for fixing a fixing plate described later. Further, the inner surface 2d has a structure that reflects the light of a light-emitting body described later.

Reference numeral 3 denotes a spring as an elastic body, which is wound around the outer edge 2e of the push button body 2 and has both end surfaces.
The guides 2f of the push button body 2 and the surface 10a of the cover 10 of the intercom A are compressed and fixed to 3a and 3b. The elastic body 3 is not limited to a spring, and an elastic body such as rubber can be considered.

Reference numeral 4 is a fixed plate, which is formed in a substantially plate shape, and has a back surface 4a on the main printed circuit board of the intercom A.
Switch pusher 5 that pushes switch 12 mounted on 11
In the center. Further, the fixing plate 4 has a connecting hole 4b into which the protrusion 2c of the push button body 2 is inserted and heat-bonded.

6 is a light-emitting body composed of an LED or the like,
It is mounted on a printed circuit board 7 having substantially the same dimensions as the fixed plate 4. The printed circuit board 7 consists of the pushbutton body 2 around which the elastic body 3 is wound and the cover 10 of the intercom A is passed through, and
Insert it into the built-in shape and push the button body into the connecting hole 4b
It is sandwiched by inserting and fixing the second protrusion 2c.

With such a structure, when the push button cover 1 is pushed with a finger, the elastic body 3 is compressed between the push button body 2 and the cover 10 of the intercom A, and the push button body 2 is placed inside the intercom A. As a result, the fixing plate 4 integrated with the push button body 2 moves to the back side. As the fixed plate 4 moves, the switch pushing part 5 on the
A switch 12 mounted on 11 is pushed, and the switch 12 is operated. When it is necessary to give an alarm, the light emitting body 6 is turned on, reflected by the inner surface 2d of the push button body 2, transmitted through the push button cover 1, and radiated to the outside.

The position of the switch pushing portion 5 is determined by the fixed plate.
The position and shape of the switch pressing portion 5 are not limited to the center of the back surface of the switch 4, and can be arbitrarily selected according to the shape of the switch 12. Further, by providing the light emitting body 5 on the printed circuit board 7, the space for the main printed circuit board 11 is vacant, and the degree of freedom in design is increased.

[0017]

In the intercom push button device according to the first aspect of the present invention, since the light emitting body built in the push button body emits light by supplying electricity to the printed circuit board, a part of the light emitting body is provided on the back surface of the fixing plate. Does not protrude, the switch pressing portion can be installed at an arbitrary position, and the switch is surely pressed by the switch pressing portion, so that the touch feeling of the push button is improved and the operation becomes reliable.

In the push button device of the intercom according to the second aspect, the switch can be pushed by the switch pushing portion provided in the central portion of the push button device, and the axis line for operating the push button device and the axis line for driving the switch coincide with each other. Therefore, the effect of claim 1 is further improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a push button device for an intercom showing an embodiment of the present invention.

FIG. 2 is an assembled perspective view of the intercom.

FIG. 3 is a perspective view of a push button device for an interphone showing a conventional example.

[Explanation of symbols]

 1 Push button cover 2 Push button body 2c Protrusion 3 Elastic body (spring) 4 Fixing plate 4b Connecting hole 5 Switch pushing part 6 Light emitting body (LED) 7 Printed circuit board A Intercom 10 Cover 11 Main printed circuit board 12 Switch

Claims (2)

[Claims] 1. A push button cover formed of a see-through material, a generally cylindrical push button body on which the push button cover is mounted, an elastic body wound around the outer edge of the push button body, and an elastic body for the push button body. An intercom push button device, comprising: a fixing plate having a switch pressing portion for pressing a switch on the back surface, and a light-emitter incorporated in the push-button body, wherein the light-emitter is printed. An intercom pushbutton device, characterized in that it is mounted on a board and the printed board is sandwiched between a pushbutton body and a fixed plate. 2. The push button device for an intercom according to claim 1, wherein the switch pushing portion of the fixed plate is provided in a central portion of the push button device.