Piezoelectric electroacoustic transducing device

Details Piezoelectric electroacoustic transducing device Piezoelectric electroacoustic transducing device

2007-07-19

2009-12-08

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S322000, C310S324000, C310S332000

Reexamination Certificate

active

07629730

ABSTRACT:
In order to simultaneously realize both improvements of the acoustic performance of a bimorph piezoelectric electroacoustic transducing device and the productivity, in a bimorph piezoelectric vibrator10in which a disk-like first piezoelectric element12is bonded to a first principal surface11aof a metal plate11, and a disk-like second piezoelectric element13is bonded to a second principal surface11bof the metal plate11, the diameter R1of the first piezoelectric element12is different from the diameter R2of the second piezoelectric element13. Furthermore, the diameter R2of the second piezoelectric element13is made smaller than the diameter R1of the first disk-like piezoelectric element12, and a lead-wire soldering portion14is ensured on the second principal surface11bof the metal plate11which is in the periphery of the second piezoelectric element13.

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