| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated piezoelectric element including a through hole electrode, which can be abutted stable against a diaphragm, and to provide a speaker utilizing the laminated piezoelectric element.SOLUTION: A laminated piezoelectric element 1, where more than one piezoelectric elements are laminated along one axis, includes one or more than one through hole electrodes 21, 22 for energizing all or some of flat electrodes 31, 32 sandwiched between the piezoelectric elements. At least one of the through hole electrodes 21, 22 is energized only from one end, out of both ends of one axis of the laminated piezoelectric element 1 and does not reach the other end. A speaker unit generates a sound pressure by a diaphragm against which the laminated piezoelectric element 1 is abutted.SELECTED DRAWING: Figure 2 |
