| 摘要 |
<p> Provided are an ultrasonic beauty instrument, a voltage application method, and an ultrasonic head, whereby a plurality of types of treatments can be performed by a single device through use of an ultrasonic vibrator for vibrating in a primary vibration mode and a vibration mode other than the primary vibration mode. In the present invention, an ultrasonic head is used in which the vibration power at a second natural frequency is at least 30% of the vibration power at a first natural frequency, an oscillator is configured having a first oscillation mode for causing the ultrasonic head to vibrate at the first natural frequency and a second oscillation mode for causing the ultrasonic head to vibrate at the second natural frequency, and it is possible to switch to one of the first or second oscillation mode.</p> |
