| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve impact resistance and vibration resistance. <P>SOLUTION: A drive device (20) includes an electro-mechanical transducer (441) having first and second end portions opposite to each other in an expansion/contraction direction, a static member (442) coupled to the first end portion of this electro-mechanical transducer, a vibration friction portion (443) mounted on the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion (423) frictionally coupled to the vibration friction portion, whereby capable of moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. An outer sheath (30) is for covering the driving device. Attitude retaining means to retain an attitude of the driving device with respect to the outer sheath is constituted of a portion (443c) provided at the vibration friction portion (443) and projecting in the expansion/contraction direction of the electro-mechanical transducer, and a hole portion (321a) bored in the outer sheath (30) and allowing the projection to be inserted thereinto. <P>COPYRIGHT: (C)2009,JPO&INPIT |
