| 摘要 |
<p>A vibration-generating device that operates always following up the mechanical resonance point is disclosed. A vibration-generating device (1) is constituted by a vibration-generating unit (2) that comprises a magnet (11) and an electromagnetic coil (13) both fixed floatingly by a spring member (12), and the electromagnetic coil (13) is driven by a square-wave to generate vibrating power. The vibration-generating device (1) has a drive control unit (10) that monitors the driving voltage of the electromagnetic coil (13) at regular time intervals, increases the driving frequency of the electromagnetic coil (13) when the induced voltage waveform of the driving voltage increases with time and decreases the driving frequency of the electromagnetic coil (13) when the induced voltage waveform decreases with time. As a result, since the driving frequency of the electromagnetic coil (13) can be changed to the resonance frequency of the vibration-generating unit (2), the driving of the electromagnetic coil can always follow up the mechanical resonance point, and a large vibrating power can be obtained.</p> |
