| 摘要 |
There are provided a piezoelectric vibration element capable of reducing occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same. Disclosed are a piezoelectric vibration element including a plurality of electrode layers and a plurality of piezoelectric layers, the plurality of electrode layers and the plurality of piezoelectric layers being stacked along a first direction, the piezoelectric vibration element having two surfaces (14a, 14b) that face each other so as to be at intervals in the first direction, and vibrating in bending mode in the first direction with an amplitude that varies along a second direction perpendicular to the first direction according to input of an electric signal, one of the two surfaces that face each other so as to be at intervals in the first direction having such a shape that a central portion thereof in a third direction perpendicular to the first direction and the second direction protrudes as compared with opposite end portions thereof in the third direction, and a piezoelectric vibration device and a portable terminal using the same. It is possible to obtain a piezoelectric vibration element capable of reducing occurrence of unnecessary vibration, a piezoelectric vibration device and a portable terminal using the same. |
