Ultrasonic cosmetic treatment device

摘要

An ultrasonic cosmetic treatment (10) device that uses a simple electrical circuit structure to provide an effective method of controlling a thermal emission from a vibrating part (18) when the vibrating part is not in contact with a predetermined surface, such as, for example, the skin of a person. The invention uses a probe (12) comprised of a contact part (22) on whose rear surface is attached an ultrasonic oscillator (24), and an oscillation circuit (14) that drives the ultrasonic oscillator. An electrical load is applied to the vibrating part when the vibrating part is brought into contact with the skin, and released when the vibrating part is separated from the skin. The ultrasonic oscillator is controlled through a changeable oscillating frequency that is based on a larger impedance value for the vibrating part's non-load applied condition as compared to a smaller impedance value for a load applied condition. <IMAGE>