Patent ID: 7981060
Filing Date: 2011-07-19
Classification: A61B,A61H,A61N

Abstract:
1. An ultrasound applying skin care device comprising: a housing provided with an applicator head which applies ultrasound to a user's skin; and a driver circuit which gives an electric pulse for actuating said applicator head to generate the ultrasound; said applicator head comprising: wherein said combined vibration mass has a structure that restrains vibrations at a center portion of said combined vibration mass to reduce a parasitic resonance, thereby differentiating said first electrically equivalent impedance from said second electrically equivalent impedance for discrimination therebetween, and wherein said vibrator element comprises a piezoelectric element in the form of a circular disc having flat upper and lower end faces, and upper and lower electrodes respectively deposited on said upper and lower end faces, said electric pulse being applied across said upper and lower electrodes, and wherein said horn has a center hole for restraining the vibrations at the center of said combined vibration mass.