| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an operation switching device for an electronic appliance capable of easily executing sound volume switch, character switch, etc., at the time of generating information by simple constitution. SOLUTION: The input terminal 55a of a microcomputer 55 is connected to a power supply terminal 19 through a resistor 18 and a resistor 32 and a switch 41 in a control part 70 through a terminal 13c. Resistors 32, 33, 34, 36 and 72 are serially connected and switches 42, 43, 71 and 45 are connected between the resistors. The direct circuit of a resistor 35 and a switch 44 is parallelly connected with the resistor 36. The other terminal of the resistor 72 is connected to the needle of a resistor 73. The terminals of the switches 41 to 43, 45 and 71 which are not connected with the resistors and one terminal of the variable resistor 73 are grounded through a terminal 13d, and the other terminal of the resistor 73 is opened. The switches 41 to 45 and 71 are operated to discontinuously vary the voltage VJ of the terminal 55a to switch operation. The resistor 73 is operated to continuously vary the voltage VJ to control the sound volume and information generation.</p> |
