| 摘要 |
<p>An actuator comprises a pillar shape ceramic piezoelectric body (1), a pair of electrodes (1a, 1b) formed on the base surfaces of the piezoelectric body, and a moving element (3) making contact with the side surface of the piezoelectric body in the longitudinal direction is caused to move by applying an ac voltage to the electrodes to energise the piezoelectric body. In one embodiment (Figure 15) two piezoelectric bodies (11, 12) are utilized to drive a sheet of paper (45). The two piezoelectric bodies are each associated with a respective roller (31, 32) that makes contact with a longitudinal side of the piezoelectric body (11, 12) and the paper is pressed against the rollers for feeding the paper. In another embodiment, (Figure 29), the side surface in the longitudinal direction of the foregoing piezoelectric body makes contact with the surface of the rail (65) which guides the piezoelectric body movement.</p> |
