| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric vibration element capable of reducing the occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same.SOLUTION: Provided is a piezoelectric vibration element having a plurality of electrode layers and piezoelectric layers laminated along a first direction, and two surfaces 14a, 14b opposed to each other leaving a space in between in the first direction, and is designed to bend and vibrate in the first direction so that when an electric signal is inputted, the amplitude changes along a second direction perpendicular to the first direction, one of the two surfaces opposed to each other leaving a space in between in the first direction being shaped so that its central portion is projected from both ends in a third direction perpendicular to the first and the second directions. Also provided are a piezoelectric vibration device and a portable terminal using the piezoelectric vibration element. A piezoelectric vibration element capable of reducing the occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same can be obtained. |
