| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the peeling of an adhesive by suppressing the deterioration of piezoelectric efficiency to a minimum. <P>SOLUTION: When a piezoelectric element fixing part (341-2) is bonded to one end face (341-1a) in the expanding/contracting direction of a laminated piezoelectric element (341-1) in which an internal electrode is laminated comprising an immunity part at the outer periphery, and a vibration friction part (342) is bonded to the other end face (341-1b) in the expanding/contracting direction of the laminated piezoelectric element (341-1), a first annular adhesive reservoir (341-2a) is formed at the piezoelectric element fixing part (341-2). A soft adhesive is held in the first annular adhesive reservoir so that one end face (341-1a) of the laminated piezoelectric element is bonded to the piezoelectric element fixing part (341-2). A second annular adhesive reservoir (342d) and an alignment guide hole (342c) for guiding the position of the other end of the laminated piezoelectric element are formed at the vibration friction part (342). The soft adhesive is held in the second annular adhesive reservoir so that the other end face (341-1b) of the laminated piezoelectric element is bonded to the vibration friction part (342). <P>COPYRIGHT: (C)2009,JPO&INPIT |
