Patent ID: 7167570

Claim:
A piezo-electric speaker comprising a piezo-electric member generating a strain according to an electric signal applied thereto; a piezo-electric vibration plate coupled with and suspending said piezo-electric member and converting the strain to the acoustic vibration; and a sound-board resonating to the acoustic vibration; said piezo-electric member having an area smaller than said piezo-electric vibration plate so that said piezo-electric member is spaced from and out of contact with said sound board; an elastic member supporting the piezo-electric vibration plate on the sound-board for generating a sound from the sound-board transmitted thereto from the piezo-electric vibration plate via the elastic member, said piezo-electric vibration plate supported at its periphery by said elastic member such that said piezo-electric vibration plate is spaced from and out of contact with said sound board, the acoustic vibration caused by the piezo-electric vibration plate being propagated from the sound-board to the ambient air to generate a sound.