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US 10,420,599 B2Granted
Ultrasonic vibrator and ultrasonic treatment device
AssigneeOlympus Corporation
InventorNagahide Sakai
Life of this patent
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Abstract
An ultrasonic vibrator and an ultrasonic treatment device which can adjust a resonant frequency while maintaining driving force are provided. An ultrasonic vibrator 1 includes two metal blocks 2, a driving unit 3 that is arranged between the metal blocks 2 and produces a piezoelectric effect to vibrate by application of an alternating voltage, and at least one adjustment unit 4 that is arranged between the metal blocks 2 and the driving unit 3 in an insulated state and changes Young's modulus.
Claims9
An ultrasonic vibrator comprising:
- two metal blocks;
- a driving unit arranged between the two metal blocks, the driving unit being configured to produce a piezoelectric effect to vibrate by application of an alternating voltage;
- and
- at least one adjustment unit arranged between the two metal blocks and the driving unit in an insulated state, the adjustment unit being configured to change Young's modulus, wherein:
- the at least one adjustment unit comprises a plurality of stacked adjustment piezoelectric elements and adjustment electrodes that are joined to the respective adjustment piezoelectric elements, and
- Young's modulus of the adjustment unit is changed by opening or short-circuiting at least one of the adjustment electrodes.
3 more elements
Dependencies are inferred from the claim text.