| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamination piezoelectric element in which decrease of displacement due to peeling of an external electrode is minimized, and to provide an injector including the same, and a fuel injection system.SOLUTION: A lamination piezoelectric element includes a laminate 4 of a piezoelectric layer 2 and an internal electrode layer 3, and an external electrode plate 5 having a bonding region 51 bonded to the side face of the laminate 4, and a non-bonding region 52 extended from the bonding region 51. A plurality of bends 52a, 52b, 52c are provided in the non-bonding region 52, and at least one bend 52c, out of the plurality of bends 52a, 52b, 52c, has a length in the extension direction different from the lengths of other bends 52a, 52b. |
