PIEZOELECTRIC ELEMENT AND AUDIO EQUIPMENT

摘要

A piezoelectric element including a piezoelectric sheet, which exhibits piezoelectricity when it is stretched, such as a polylactic acid, has a problem in that the piezoelectric sheet tends to tear along a stretching direction. For example, when a bimorph type piezoelectric element (31) is to be configured, the stretching axis (39) of one piezoelectric sheet (32) and the stretching axis (40) of the other piezoelectric sheet (33) are oriented in different directions from each other. Preferably, the one stretching axis (39) and the other stretching axis (40) are intersected at an angle of 90 degrees.