PIEZOELECTRIC ELEMENT AND AUDIO EQUIPMENT

摘要

A piezoelectric element comprising a piezoelectric sheet expressing a piezoelectricity by being extended, such as one made of polylactic acid, has a problem in that the piezoelectric sheet tends to tear along an extending direction. When a bimorph type piezoelectric element (31) is structured, for example, the extending axis (39) of one piezoelectric sheet (32) and the extending axis (40) of the other piezoelectric sheet (33) are directed to mutually different directions. Preferably, the one extending axis (39) and the other extending axis (40) are intersected at an angle of 90 degrees.