| 摘要 |
In a piezoelectric oscillator used for an acoustic apparatus, an oscillation controlling piece of elastomer is attached to the periphery of a piezoelectric oscillation plate. The oscillation controlling piece is shaped so that a distance between an axis passing by a center of the piezoelectric oscillation plate, which is perpendicular to a straight line connecting a center of the piezoelectric oscillation plate to the center of gravity of the oscillation controlling piece, and a mass center line of the oscillation controlling piece varies along the axis, or so that a mass of each of sections of the oscillation controlling piece divided by a plurality of straight lines parallel to a straight line connecting a center of the piezoelectric oscillation plate to the center of gravity of the oscillation controlling piece varies along an axis which is perpendicular to the straight line and passes through the center of the piezoelectric oscillation plate. <IMAGE> |
