Patent ID: 8669690

Claim:
A piezoelectric sound-generating device of a square shape, said piezoelectric sound-generating device characterized by comprising: a vibration plate having a main square area in which multiple first openings are formed, and multiple extension parts on which second openings are formed and which are projecting from an outer periphery of the main area; a frame having a rim that circularly supports a vicinity of a continuous outer periphery of the main area and extension parts of the vibration plate, adhesively attached on one principle side of the vibration plate; a square bimorph piezoelectric element having multiple surface electrodes formed in positions corresponding to the first openings on the one principle side of the vibration plate, adhesively attached in the main area on the other principle side of the vibration plate; a terminal having an insulative substrate and terminal electrodes formed on one principle side of the substrate, adhesively attached on the other principle side of the extension parts of the vibration plate; and multiple lead conductors formed on the one principle side of the vibration plate, respectively, from the surface electrodes of the piezoelectric element exposed in the first openings, to the terminal electrodes of the terminal exposed in the second openings.