| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric vibration element in which the occurrence of unnecessary vibrations can be reduced, and a piezoelectric vibration device and a portable terminal using the piezoelectric vibration element.SOLUTION: There are provided a piezoelectric vibration element, and a piezoelectric vibration device and a portable terminal using the piezoelectric vibration element. The piezoelectric vibration element 14 includes plural electrode layers and piezoelectric layers laminated in a first direction, has two surfaces 14a and 14b facing each other with a space therebetween in the first direction, and bends and vibrates in the first direction so that amplitude changes in a second direction perpendicular to the first direction by input of an electrical signal. One of the two surfaces facing each other with a space therebetween in the first direction has a shape protruding more in its center than in both ends in a third direction perpendicular to the first direction and the second direction. This configuration can provide a piezoelectric vibration element in which the occurrence of unnecessary vibrations can be reduced, and a piezoelectric vibration device and a portable terminal using the piezoelectric vibration element. |
