| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ultrasonic oral cavity cleaner which generates a cavitation phenomenon by a compact device and safe method to show strong cleaning action of ultrasonic waves at regions where a brush cannot reach to thereby offset defects of a brushing method. <P>SOLUTION: In general, when two waves with different frequencies are proceeded in a same direction and crossed, a resonant wave with a frequency equal to the difference between two frequencies of the two waves is synthesized. An ultrasonic oscillator is set so that the physical phenomenon develops. Ultrasonic waves are simultaneously oscillated in a same direction from two convergent ultrasonic oscillators with frequencies different from each other by 15-300 KHz in water and crossed to synthesize a resonant wave with 15-300 KHz of frequency corresponding to the frequency difference between two ultrasonic waves. The synthesized ultrasonic wave is emitted from a nozzle. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
