| 摘要 |
[Problem] There is provided piezoelectric actuator capable of suppressing disconnection of a junction due to tensile stress. [Solution] A piezoelectric actuator of the invention includes a piezoelectric element, a base body (7) having an upper face on which a lower end of the piezoelectric element abuts, and a case (3) having an inner face on which an upper end of the piezoelectric element abuts, the case being configured to enclose the piezoelectric element, wherein the case (3) includes a flange portion (33) configured to be joined to the base body (7), and at least two bent portions (41) are present on an inner face that is formed from a lower face of the flange portion (33) of the case (3) to the upper face of the base body (7) on an enclosure space side of a junction between the case and the base body. |
