| 摘要 |
A tact switch device for a mobile communication terminal is provided to use a tact switch designed to be used in a 2-contact point type of a keypad in a 3-contact point keypad type by a switch diode. Power is supplied to separated two terminals(34,34-1). Switching diodes(30) are separately connected to the terminals(34,34-1). Outputs of the switching diodes(30) are added. The added output is connected with one end of a tact switch(32), and the other end of the tact switch(32) is connected to the ground. The tact switch is operated as a 3-contact point keypad.
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