| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving device and a driving device unit that have a bearing portion enabling the prevention of axial rotation of a vibrating shaft without hampering vibration in the axial direction and are small in size and high in positional accuracy. <P>SOLUTION: The vibrating shaft and the bearing portion respectively have a restriction face for restricting the axial rotation of the vibrating shaft when they are abutted against each other. The restriction face of the vibrating shaft is abutted and pressed against the restriction face of the bearing portion. At this time, the pressing force is so controlled that the maximum resistance force received from the bearing portion when the vibrating shaft is vibrating is equal to or lower than 2.5 times the maximum frictional force between a moving member and the vibrating shaft. <P>COPYRIGHT: (C)2009,JPO&INPIT |
