| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electronic equipment operation part having high operability at a low cost. SOLUTION: A signal transmission device for checking operation is constituted of a vibration actuator 101 for generating mechanical vibration and a buzzing tone, a self-exciting oscillation circuit 102 for vibrating the actuator 101 so as to self-excite it, a buzzer driving voltage doubler circuit 103 for allowing the actuator 101 to generate a buzzing tone, a click detection circuit 104 for discriminating the button depression of operation equipment 106, and a coupling circuit 105 for electrically insulating the equipment 106 from the circuit 104 and passing only a signal. When a time base extending function for extending pulse width is added to the circuit 104, an operation checking signal can be easily sensed by a human body. The operation part of the electronic equipment having the signal transmission device is constituted at a low cost and has high operability.</p> |
