JPH03285437A - Illuminated key telephone set - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to reduce the profile of the enclosure of a telephone set by forming a switch for selectively emitting a light emitting element as a phragm switch and integrating a condenser part to a phragm actuator equipped with a pressure pin for operating the phragm switch. CONSTITUTION:A key top 10 is composed of a frame 11 and a button key 13 one-side supported through a hinge 12b to an arch member 12a. On the other hand, plural phragm switches 21 and light emitting elements 22 are mounted on a printed circuit board 20. The phragm switches 21 emit the light emitting elements 22 when connecting carbon contacts 21a and 21b. A key base 30 to be arranged between the key top 10 and the printed circuit board 20 is composed of a frame 31 and a phragm actuator 33 one-side supported through a hinge 32. The phragm actuator 33 is equipped with a pressure pin 33b to press the phragm switch 21 when pressing each button key 13, and a condenser part 33c to condense the light emitted from each light emitting element 22 at the back of each button key 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a self-illuminating button telephone in which a button pressed during a call operation or the like lights up.

BACKGROUND OF THE INVENTION Traditionally, button-type telephones have been popular as telephones for pushbutton lines, but in recent years they have also come to be widely used as telephones for dial lines.

In general, button telephones send dial pulses to the line that correspond to the numbers assigned to the pressed button key, but unlike in the case of a pushbutton line, the receiver of the calling party's telephone does not receive a dial pulse. Since no backtone is sent out when the button key is pressed and only the sound of a dial pulse is heard, it is difficult for the caller to confirm whether or not the dial pulse of the pressed button key was sent to the line. could not.

Recently, self-illuminating button telephone devices have been provided in which the pressed button keys light up as the button keys are pressed, and this is considered a suitable means for improving the aesthetic appearance of the telephone. ing.

Hereinafter, a conventional self-illuminated button telephone will be explained based on FIGS. 9 to 11.

Figure 9 is an exploded perspective view of the main parts of a conventional self-illuminated button telephone;
FIG. 10 is an enlarged view of the main parts of a conventional self-illuminated button telephone in a normal state, and FIG. 11 is an enlarged view of the main parts of the conventional self-illuminated button telephone in a state where the button keys are pressed.

In the figure, 1 is a plurality of button keys that are cantilever-supported on a frame 1a via hinges 1b, and 2 is a printed circuit board on which various electrical components including a plurality of tact switches 3 and light emitting elements 4 are mounted. ing.

On the back of each button key IC, characters such as numbers assigned to this button key 10 are printed, and when the pin 3a of the tact switch 3 is pressed, the internal contact is closed, and the light emitting element 4 is made to emit light.

Reference numeral 5 denotes a key base interposed between the key top l and the printed circuit board 2, and a frame 5a.
A plurality of pressing pieces 5 are cantilever-supported via hinges 5b.
It has c.

Reference numeral 6 denotes a light collecting frame interposed between the key base 5 and the printed circuit board 2, which collects light emitted from each light emitting element 4 on the printed circuit board 2 to the key top 1.
A light condensing section 6a for concentrating light on the back of each button key IC.
is arranged at a position that does not hinder the movement of the pressing piece 5a of the key base 5.

Next, the operation of the above conventional example will be explained.

When the button key IC shown in FIG.
As shown in the figure, the pressing piece 5C of the key base 5 is pressed and descends, pushing down the pin 3a of the tact switch 3. As the pin 3a is pressed, an internal contact of the tact switch 3 closes, a dial signal such as a number assigned to the pressed button key IC is sent to the line, and the light emitting element 4 emits light.

The light emitted from the light emitting element 4 is focused on the back surface of the pressed button key 10 by the light focusing portion 6a of the light focusing frame 6, so that the button key 10 is illuminated.

SUMMARY OF THE INVENTION However, in the above-mentioned conventional self-illuminating button telephone, the tongue pressing piece 5c that activates the plum switch 3 and the condensing section 6a that condenses the light of the light emitting element 4 are provided separately. In addition to using separate intermediate members, that is, the key base 5 and the light collecting frame 6, the tact switch 3 was used as the tanu switch that selectively causes the light emitting element 4 to emit light, so the thickness of the phone body became thicker. Another problem was that the number of parts increased.

The present invention solves the above-mentioned problems, and provides a self-illuminating button telephone that can reduce the thickness of the phone's casing and further simplify the structure by reducing the number of parts. With the goal.

Means for Solving the Problems In order to achieve the above object, the present invention provides a key top formed by supporting a plurality of button keys in a cantilever manner, a plum switch corresponding to each button key, and a light emitting light when the seven lamb switches are pressed. A printed circuit board on which a plurality of light emitting elements are mounted, a press pin that presses a flam switch when each button key is pressed, and a light condensing section that focuses the light emitted from each light emitting element on the back of each button key. The present invention has a configuration in which a plurality of flam actuators each having a flammable actuator are supported in a cantilever manner, and includes a key top and a key base disposed between a printed circuit board.

According to the above configuration, the present invention uses a flam switch as the switch for selectively causing the light emitting element to emit light, and a flam switch as the light condensing section that focuses the light emitted from the light emitting element on the back surface of the button key. It can be integrated into a flam actuator with a push pin for actuation,
Therefore, the number of parts can be reduced and the structure can be simplified, and the thickness of the casing of the telephone can be reduced.

Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a partially cutaway perspective view showing a self-illuminating button telephone according to an embodiment of the present invention, FIG. 2 is a plan view showing a key top in the self-illuminating button telephone of FIG. 1, and FIG. 3 is the same as that shown in FIG. Fig. 4 is a plan view showing the key base in the self-illuminating button telephone of Fig. 1, and Fig. 5 shows the attachment relationship of the key top, key base, and printed circuit board. 6 is an explanatory diagram showing a schematic configuration of the main parts of the self-illuminating button telephone of FIG. 1, and FIG. 7 is an enlarged cross-section of the main parts of the self-illuminating button telephone of FIG. 1 showing a normal state. FIG. 8 is an enlarged sectional view of a main part of the self-illuminating button telephone shown in FIG. 1, showing a state in which the button key is pressed.

In the figure, 1o is a key top, which includes a frame 11 formed in a substantially lattice shape and an arch member 1 installed on opposite sides of a plurality of substantially square frames formed by the frames 11.
2a, and a button key 13 which is cantilever-supported by the second arch member 12a via a hinge 12b and has a flange 14 formed on its periphery.

The back surface of the button key 13 is formed flat, and the numbers 13a assigned to each button key 13 are printed in a transparent color such as white, and the background portion 13b is printed in a non-transparent color such as black. Each is printed using blank-out solid printing.

Further, the frame 11 is provided with a fitting hole 11a into which a positioning pin of a key base, which will be described later, is fitted, and a clamping piece 11b which holds the positioning pin.

On the other hand, 20 is a printed circuit board on which various electrical components including a plurality of plum switches 21 and a light emitting element 22 are mounted, and an insertion hole 23 into which a positioning leg of a key base, which will be described later, is inserted is bored. It is set up.

As shown in FIGS. 5 and 7, the flam switch 21 includes, for example, a ring-shaped carbon contact 21a, another carbon contact 21b disposed inside the ring-shaped carbon contact 21a, and a peripheral edge of the carbon contact 21a. It is generally composed of a diaphragm 21C made of a conductive member that constantly contacts a ring-shaped carbon contact 21a and presses the center thereof, and also contacts another carbon contact 21b. When the two carbon contacts Q12 and 21b are connected, the light emitting element 22 emits light.

Reference numeral 30 denotes a key base disposed to be interposed between the key top 10 and the printed circuit board 20, and includes a frame 31 formed in a substantially lattice shape and a plurality of substantially square shapes formed by the frame 3]. The flamm actuators 33 are each supported in a cantilever manner via hinges 32 within the frame of the flammable actuators 33.

This flam actuator 33 includes a button contact pin 33a that contacts each button key 13 of the key top 10 placed on the key base 3o, and a button contact pin 33a that contacts each button key 13 of the key top 10 placed on the key base 3o, and a button contact pin 33a that contacts each button key 13 of the flam switch 21 when pressed. A press pin 33b that contacts and presses the button key 14 and a light condensing section 33c that condenses light emitted from each light emitting element 22 onto the back surface of each button key 14 are provided.

On the other hand, a plurality of positioning pins 31a for positioning the key base 3o and the key top 10 are protruded from the frame 31, and the positioning pin 31a is fitted into the fitting hole 113 of the key top 10, or By being held between the pieces 11b, the key top 10 is positioned with respect to the key base 30 so that the button key 13 faces directly above the light condensing part 33c.

Further, the frame 31 is formed with a plurality of stoppers 31b extending inward of the plurality of substantially square frames formed by the frame 11, and when the button key 13 is pressed, the pressing pin 33b of the flam actuator 33 is The downward stroke of the flange 14 formed around the button key 13 is limited so that the flammable switch 21 is not overloaded.

Further, the frame 31 has a plurality of protruding legs 31C for positioning the key base 30 and the printed circuit board 2o, and when the positioning legs 31C are inserted into the insertion holes 23 of the printed circuit board 20, the flammable The key base 30 is positioned relative to the printed circuit board 20 so that the press pin 33b of the actuator 33 faces directly above the flam switch 21.

Next, the operation of the present invention will be explained.

In FIG. 1, when the button key 13 is pressed, the seventh
The flam actuator 33, which was in its normal state as shown in the figure, descends as its contact pin 33a is pressed by the button key 13, and as a result, the pressing pin 3
3b presses the diaphragm 21c of the flam switch 21.

As the diaphragm 21c is pressed, the two carbon contacts 21a and 21b of the phragm switch 21 are connected via the conductive diaphragm 21c, and a dial signal such as a number assigned to the pressed button key 13 is sent to the line. and the two carbon contacts 21a,
The developed optical element 22 to which 21b is connected emits light.

When the second light emitting element 22 is emitting light, that is, while the button key 13 is being pressed, the flam actuator 33 is in a lowered state as shown in FIG. 8, as described above.

For the second reason, the light condensing section 3 provided on the flam actuator 33
The lower part of 3c wraps around the light emitting element 22, and the light emitted from the light emitting element 22 is focused on the back surface of the button key 13, and the pressed button key 13 is efficiently illuminated.

Effects of the Invention As described above, according to the present invention, a key top formed by cantilever-supporting a plurality of button keys, a flam switch corresponding to each button key, and a plurality of light emitting elements that emit light when the flam switch is pressed are mounted. A plurality of flam actuators each having a printed circuit board made of a flammable printed circuit board, a pressing pin that presses a plum switch when each button key is pressed, and a condensing section that focuses light emitted from each light emitting element onto the back surface of each button key. Since the configuration includes a key base disposed between the key top and the printed circuit board, which are individually supported in a cantilever manner, seven switches are provided to selectively emit light from the light emitting elements.
It is possible to integrate the light condensing part that serves as a ram switch and focuses the light emitted from the light emitting element onto the back of the button key into a ram actuator that has a press pin for actuating the ram switch. The structure can be simplified by reducing the number of points, and the thickness of the casing of the telephone can be reduced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a self-illuminating button telephone according to an embodiment of the present invention, FIG. 2 is a plan view showing a key top in the self-illuminating button telephone of FIG. 1, and FIG. 3 is the same as that shown in FIG. Fig. 4 is a plan view showing the key base in the self-illuminating button telephone of Fig. 1, and Fig. 5 shows the attachment relationship of the key top, key base, and printed circuit board. 6 is an explanatory diagram showing a schematic configuration of the main parts of the self-illuminating button telephone of FIG. 1, and FIG. 7 is an enlarged cross-section of the main parts of the self-illuminating button telephone of FIG. 1 showing a normal state. 8 is an enlarged cross-sectional view of the main part of the self-illuminating button telephone shown in FIG. 1 showing a state in which the button key is pressed, FIG. 9 is an exploded perspective view of the main part of the conventional self-illuminating button telephone, and FIG. 10 is an enlarged view of the main parts showing the normal state of a conventional self-illuminated button telephone;
FIG. 11 is an enlarged view of the main part showing a state in which the button key is pressed. 10...Key top, 13...Button key 20.
...Printed circuit board, 21...Fram switch, 22...
- Light emitting element, 30... Key base, 33... Flam actuator, 33b... Press bottle, 33C... Light condensing unit.

Claims (1)

[Claims] A key top that supports multiple button keys in a cantilevered manner,
A printed circuit board comprising a flam switch corresponding to each button key and a plurality of light emitting elements that emit light when the flam switch is pressed, a press pin that presses the flam switch when each button key is pressed, and each light emitting element. A self-illuminated type consisting of a plurality of cantilever-supported flam actuators each having a condensing part that condenses the emitted light on the back of each button key, and a key base disposed between the key top and the printed circuit board. button telephone.