| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for improving the durability of a driver, by suppressing the deterioration due to the friction between members. <P>SOLUTION: This driver is equipped with a specified member which takes a motion in cooperation with the operation of a specified driving means, a movable part which engages with the specified member by frictional force and also is possible of relative shift to the specified member by the action of the specified driving means, and a mode changing means which changes the shifting mode of the driver in specified timing between a plurality of shifting modes which include a first shifting mode where the movable part shifts relatively in a first shifting range to the specified member and a second shifting mode where the movable part shifts relatively in a second shifting range different from the first shifting range. <P>COPYRIGHT: (C)2008,JPO&INPIT |
