Patent ID: 8585619

Claim:
An apparatus for maintaining and supplying stable power to a skin care device equipped with a DC-DC converting unit for escalating the voltages from a charged battery power source, a skin stimulating unit including at least one of a supersonic element or ion inducting element, a switch unit having a main switch and various functional switches, a LCD displayer for indicating various operating modes, and a CPU for controlling each component comprises: a voltage amplifier for amplifying a voltages signal according to a control signal from the CPU, a supersonic vibrator activated by the amplified voltage signal received via a resonance unit, the resonance unit that resonates with free of the vibration when a pulse added to the amplified voltage signal, a vibration-generating unit connected with the resonance unit, a vibrating unit for vibrating the supersonic vibrator using the power transmitted from the vibration-generating unit, and a skin contact sensing unit ( 60 ) consisted of a current sensing unit ( 61 ) connected to the vibration-generating unit ( 54 ) and an amplifier ( 62 ) for amplifying and transmitting the sensed signal to the CPU, wherein said skin contact sensing unit ( 60 ) is for sensing skin contact and feeding back the signals to the CPU, so that the CPU controls the vibrating-generating unit ( 54 ) according to the feedback of the skin contact sensing signal.