Ultrasonic oscillating device and ultrasonic washing apparatus using the same
AssigneeKaijo Denki Co., Ltd.
InventorHajime Shibata
Life of this patent
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Abstract
An ultrasonic oscillating device comprising a base plate and an ultrasonic transducer attached to the base plate. The thickness of the base plate is an integer multiple of approximately a half-wavelength of an oscillation of the base plate in the direction of its thickness under a driving frequency. The base plate may be a quadrilateral such as a square and a rectangle with a length of one side of the quadrilateral being at least a quarter-wavelength of the oscillation. The base plate may be a circle with a length of a diameter of the circle being at least a quarter-wavelength of the oscillation. An ultrasonic washing apparatus comprising a cleaning tank, an ultrasonic multi-frequency oscillator, and the ultrasonic oscillating device is also provided.
Claims4
An ultrasonic washing apparatus, comprising:
- a tank for containing cleaning liquid, the tank comprising an opening in a bottom wall thereof;
- an ultrasonic oscillating device for emitting an ultrasonic wave into the cleaning liquid of the tank, said ultrasonic oscillating device being sealingly mounted in said bottom opening;
- and
- an ultrasonic oscillator for outputting a drive oscillating signal to the ultrasonic oscillating device,
- wherein the ultrasonic oscillator is a multifrequency oscillator constituting means for outputting a drive oscillating signal having a fundamental frequency, and an odd number multiple of the fundamental frequency, and
- wherein the ultrasonic oscillating device comprises a base plate and an ultrasonic transducer attached to the base plate, the base plate having a thickness which is an integer multiple of approximately a half-wavelength of a resonance frequency of the base plate oscillating in the direction of the thickness thereof, and
- in which the base plate is substantially in the shape of a circle with a length of a diameter of the circle being at least a quarter-wavelength of the resonance frequency of the base plate.
Dependencies are inferred from the claim text.