| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the lengthening of a head causes a base member joining an energy generation means such as a piezoelectric element to warp. SOLUTION: The base member 13 is provided with a wide portion 13B having a width W2 larger than the crosswise direction width W1 of a joint 13a in the crosswise direction by being provided with projecting portions 13A and 13A projecting outwardly from end faces 13b and 13b intersecting the end of the joint 13a with which a piezoelectric element member 12A is joined at right angles, the side 13d opposite to the joint 13a is shaped into an inverted T cross-section wider than the joint 13a. COPYRIGHT: (C)2008,JPO&INPIT
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