ACTUATOR ELEMENT AND DEVICE HAVING ACTUATOR ELEMENT

摘要

An actuator element is disclosed which comprises a plate member (12), a piezoelectric body (14) arranged opposite to the plate member (12), and bars (16) arranged between the plate member (12) and the piezoelectric body (14) for fixing the piezoelectric body (14) to the plate member (12). The piezoelectric body (14) comprises at least one piezoelectric layer (26), an upper electrode (28) formed on one side of the piezoelectric layer (26) facing the plate member (12), and a lower electrode (30) formed on the other side of the piezoelectric layer (26). By applying an electric field between the upper electrode (28) and the lower electrode (30), a part of the piezoelectric body (14) is so displaced as to get closer to or away from the plate member (12).