JPH1131431A - Push button switch - Google Patents

Abstract

(57) [Problem] To provide a push-button switch in which a contact portion vertically moves up and down and which can be stably pressed down. SOLUTION: 1 is a cover panel, 12 is a resin upper case, 3 is a printed wiring board (PWB), 4 is an optical element for transmission, 5 is a switch circuit formed on the PWB 3, 6
Is a lower case made of resin, and 7 is a battery. Upper case 1
2, an operation button and four hinge portions are integrally formed. The four hinges have a swastika shape as a whole,
The operation button is arranged at the center of the swastika shape, and a carbon layer as a conductor is formed on the bottom surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-button switch such as a remote control transmitter used for remotely controlling various electronic devices.

[0002]

2. Description of the Related Art Conventionally, a push button switch of a remote control transmitter used for remotely controlling an electronic device such as a television receiver has an operation button made of, for example, rubber, which is different from a resin case. Had been used.

FIG. 7 is an exploded perspective view showing a conventional remote control transmitter provided with a push button switch. In the figure,
1 is a cover panel, 2 is a resin upper case, 3 is a printed wiring board (PWB), 4 is an optical element for transmission, and 5 is a PW
A switch circuit formed on B3, 6 is a lower case made of resin, 7 is a battery, 8 is a rubber plate on which a plurality of operation buttons 8a serving as push buttons are arranged and formed.

FIG. 8 is a cross-sectional view of the push-button switch of FIG.
It is an expanded sectional view shown along a line. The plurality of operation buttons 8a formed on the rubber plate 8 constitute a key top of the remote control transmitter. That is, when the rubber plate 8 is disposed between the upper case 2 and the PWB 3, these operation buttons 8a protrude from the corresponding holes 2a of the upper case 2. A carbon layer 9, which is a conductor, is adhered and formed on the bottom surface of each operation button 8a. When a specific operation button 8a is pushed down and its bottom surface is lowered, the carbon layer 9 is switched to the PWB 3 switch circuit. 5 is short-circuited at a predetermined contact portion. As a result, a signal corresponding to the short-circuited contact portion is output from the transmitting optical element 4, and channel selection of the television receiver can be performed.

The push-button switch using such a rubber plate 8 is not easy to assemble because the material is different from the upper and lower cases 2 and 6 made of resin. Therefore,
A remote control transmitter in which operation buttons are integrally formed on the case has also been developed.

FIG. 9 is a diagram showing a remote control transmitter provided with such a push-button switch, and FIG. 10 is an enlarged sectional view of the push-button switch shown in FIG. 9 taken along the line DD.
This push-button switch is formed by integrally forming an operation button 2b hinge-supported by a holding portion 2c in an opening 2a of the upper case 2, thereby forming a rubber plate 8 as shown in FIG.
Is to be eliminated. As for the other constituent members, those corresponding to those shown in FIG. 7 are denoted by the same reference numerals.

[0007]

In such a remote control transmitter using the operation button 2b as a push button, the whole is made of resin and the assembling work is easy.
Since the operation button 2b is shifted downward by bending of the c, the operation button 2b does not vertically contact the PWB 3,
There is a problem that the operation feeling is not good.

Further, as shown in FIGS. 11 and 12, if the operation button 2b is supported from both sides at a substantially central portion of the opening 2a by a pair of holding portions 2d each having a U-shape. , The operation button 2b descends perpendicularly to the PWB 3, and comes into contact with its contact portion in a substantially parallel plane. However, when depressing the operation button 2b, in the L direction where the holding portion 2d is joined,
The operation button 2b is shaky in the R direction orthogonal to the direction.
For this reason, in particular, the longer the push-down distance of the push-button switch, the less stable the switching operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a push-button switch having a structure in which a contact portion vertically moves up and down and capable of performing a stable pressing operation. It is intended for.

[0010]

According to a first aspect of the present invention, there is provided a push button switch including a board on which a plurality of switch circuits are formed, a switch case for housing the board, and a predetermined contact position of the switch circuit. It has an operation button integrally formed on the switch case at a position corresponding to, and a hinge part for connecting the operation button to the switch case, the hinge part has a swastika shape, and the operation button is the center of the swastika shape It is characterized by being arranged in.

A push button switch according to a second aspect of the present invention is a cover panel which is disposed outside a switch case and has an opening through which an operation button projects. And an annular collar formed at a connection portion of the operation button with the hinge.

Further, in the push button switch according to a third aspect of the present invention, a concave groove surrounding the operation button is formed in a flange portion of the operation button.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment in which the push button switch of the present invention is applied to a remote control transmitter will be described.

Embodiment 1 FIG. 1 is an exploded perspective view showing a remote control transmitter including a push button switch according to Embodiment 1 of the present invention. In the figure, 1 is a cover panel,
Reference numeral 12 denotes a resin upper case in which a plurality of operation buttons (for example, AA portions) are integrally formed, and 3 denotes a printed wiring board (PW
B), 4 is an optical element for transmission, 5 is a switch circuit formed on the PWB 3, 6 is a lower case made of resin, and 7 is a battery.

FIG. 2 is an enlarged perspective view showing the operation buttons of the push button switch of the AA section in FIG. 1, and FIG. 3 is an enlarged sectional view of the push button switch shown in FIG. is there. Although only one switch circuit is shown in FIG. 1, a plurality of switch circuits 5 are formed in the PWB 3, and a corresponding number of switch openings 12a are formed in the upper case 12 for accommodating the PWB 3. Have been. An operation button 12b and four hinge portions 12d are formed integrally with the switch opening 12a to connect and hold the operation button 12b to the upper case 12.

Here, the four hinge portions 12d have a swastika shape as a whole, the operation buttons 12b are arranged at the center of the swastika shape, and a carbon layer 9 as a conductor is formed on the bottom surface thereof. . Further, these operation buttons 12b are, for example, in a columnar shape, and the tip portions protrude from the corresponding circular openings 1a of the cover panel 1, and the cover panel 1 covers and covers the hinge portion 12d and the lower end of the column. .

Next, the operation of the remote control transmitter having the above configuration will be described.

Since the operation button 12b integrally formed with the upper case 12 is formed so as to be located at the center of the four hinge portions 12d, the operation button 12b is pushed down and the hinge portions 12d are evenly bent. Then, the operation button 12b is lowered vertically. Moreover, the operation buttons 12
b descends with a sense of stability without swinging in any of the front and rear (L direction) and left and right (R direction), so that the carbon layer 9 on the bottom surface of the operation button 12b surely contacts the corresponding switch circuit 5 of the PWB 3 , A predetermined contact portion is short-circuited. As a result, a corresponding signal is output from the optical element 4 for transmission, and channel switching of the television receiver can be performed.

Embodiment 2 In the first embodiment described above, the plurality of operation buttons 12b formed on the upper case 12
Are operated in the vertical direction while projecting from the corresponding circular opening 1a of the cover panel 1.
There is a slight gap between and the operation button 12b. Therefore, although the hinge portion 12d is covered by the cover panel 1, when the use environment is poor, there is a fear that dust or dust may enter the inside of the remote control transmitter from the small gap.

FIG. 4 is a view showing a push-button switch corresponding to the AA part in FIG. 4 differs from the first embodiment (FIG. 2) in that the annular seating surface 12 is provided at the connection between the swastika-shaped hinge portion 12d and the operation button 12b.
e (flange) is formed.

By forming the annular seating surface 12e, dust and dust can be prevented from entering the inside from the upper case 12 covered by the cover panel 1, and PWB can be prevented.
3 can protect the internal circuits from contamination.

Embodiment 3 FIG. FIG. 5 is similar to FIG.
The figure which shows the pushbutton switch of the part corresponding to the AA part of FIG.
FIG. 6 is an enlarged cross-sectional view of the push button switch of FIG. 5 taken along line BB. In these figures, 12f is:
A concave groove formed on the annular seating surface 12e (flange) so as to surround the operation button 12e. If the use environment of the remote control transmitter is humid, water droplets may be generated from a small gap between the opening 1a of the cover panel 1 and the operation button 12b.
There is a fear of falling to WB3. By providing the concave groove 12f, it is possible to prevent water droplets falling into the inside from the gap and to prevent a malfunction at the contact point.

[0023]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, since the hinge portion has a swastika shape and the operation button is disposed at the center of the swastika shape, the operation button can be pressed down vertically.
It is possible to provide a push button switch capable of performing a stable pressing operation.

According to the second aspect of the present invention, the annular seating surface can prevent dust and dust from entering the inside.

Further, according to the third aspect of the present invention, a concave groove is provided to prevent water drops falling from the gap, thereby preventing the occurrence of malfunction.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a remote control transmitter including a push button switch according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged perspective view showing an AA part of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a diagram illustrating a push button switch according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a push button switch according to Embodiment 3 of the present invention. FIG. 6 is a diagram showing a push-button switch corresponding to the portion AA in FIG. 1, and FIG. 6 is an enlarged sectional view of the push-button switch shown in FIG. 5 taken along line BB.

FIG. 6 is an enlarged sectional view taken along line AA of FIG.

FIG. 7 is an exploded perspective view showing a conventional remote control transmitter including a push button switch.

FIG. 8 is an enlarged sectional view taken along line CC of FIG. 7;

FIG. 9 is an exploded perspective view showing another remote control transmitter including a conventional push button switch.

FIG. 10 is an enlarged sectional view taken along line DD of FIG. 9;

FIG. 11 is an exploded perspective view illustrating another remote control transmitter including a conventional push button switch.

FIG. 12 is an enlarged sectional view taken along line EE in FIG. 11;

[Explanation of symbols]

1 Cover panel, 3 Printed wiring board (PW
B), 4 optical elements for transmission, 5 switch circuits,
6 lower case, 7 battery, 12 upper case,
12a opening for switch, 12b operation button,
12d hinge part, 12e annular seating surface (flange part),
12f Groove.

Claims (3)

[Claims] 1. A board on which a plurality of switch circuits are formed, a switch case for accommodating the board, and an operation button integrally formed on the switch case at a position corresponding to a predetermined contact position of the switch circuit. A push button, comprising: a hinge portion for connecting the operation button to the switch case; wherein the hinge portion has a swastika shape; and the operation button is disposed at the center of the swastika shape. switch. 2. The push button switch according to claim 1, wherein the cover panel is disposed outside the switch case and has an opening from which the operation button protrudes, and a connection portion between the cover panel and a hinge portion of the operation button. A push button switch comprising a formed annular flange. 3. The push button switch according to claim 2, wherein a concave groove surrounding the operation button is formed in a flange portion of the operation button.