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1. (WO1998051255) ULTRASONIC DEVICE

Pub. No.:    WO/1998/051255    International Application No.:    PCT/JP1998/002140
Publication Date: Fri Nov 20 00:59:59 CET 1998 International Filing Date: Sat May 16 01:59:59 CEST 1998
IPC: A61B 17/00
A61H 23/02
A61N 7/00
Applicants: MATSUSHITA ELECTRIC WORKS, LTD.

AKISADA, Shosuke

INOUE, Hiromitu

ABE, Hideaki

KAWAI, Kozo

MUTO, Motoharu

HAYASHI, Masayuki

NISHIMURA, Shinji

SAIDA, Itaru

Inventors: AKISADA, Shosuke

INOUE, Hiromitu

ABE, Hideaki

KAWAI, Kozo

MUTO, Motoharu

HAYASHI, Masayuki

NISHIMURA, Shinji

SAIDA, Itaru

Title: ULTRASONIC DEVICE
Abstract:
An ultrasonic device which is very safe and easy to use, comprising a hand-held treatment device having a vibration element which is brought into contact with the skin of the user to apply an ultrasonic wave to the skin, a power supply for supplying a DC voltage, an oscillation circuit which generates a vibration output voltage for driving the vibration element by the DC voltage from the power supply, a load detection circuit which detects the application of a load applied to the skin by, for instance, bringing the vibration element into contact with the skin and generates a load detection output when a load is applied to the vibration element, a movement detection circuit which detects the movement of the vibration element and generates a movement detection output when the vibration element is moved, and a control circuit connected to the load detection circuit and the movement detection circuit. When the load detection signal is not inputted within a specified 1st period or when the load detection signal is inputted within the specified 1st period but the movement detection signal is not inputted within a specified 2nd period successively for a specified time, the control circuit controls the oscillation circuit and reduces the vibration output.