PIEZOELECTRIC SPEAKER

摘要

PURPOSE: A piezoelectric speaker is provided to be capable of reducing the weight of a vibration panel, while securing the rigidity of the vibration panel and the thermal expansion coefficient of the vibration panel surface. CONSTITUTION: A piezoelectric speaker(10) and a circuit part(20) are formed as one piece. The piezoelectric speaker includes a vibration panel made of a two-story surface layer(7), an aluminium core layer(8) formed between the two-story surface layer, and a two-story insulating layer(9) formed between the two-story surface layer and the aluminium core layer. The board of the circuit part is formed by using the same materials as the vibration panel of the piezoelectric speaker. The piezoelectric speaker further includes a piezoelectric device(14) formed at the upper portion of the vibration panel.