| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow a movable lens to be easily stopped even in the vicinity of a wide end where inertia is large and stopping accuracy thereof to be enhanced. <P>SOLUTION: When a cam cylinder 48 is rotated, a rack 47 integrated with a pin 46B projecting into a movable frame 46 is moved in an optical axis direction, in a region where a cam rises in the vicinity of a wide end, a gear 47A formed on the rack 47 and a gear 49A mounted on an output shaft of a rotary damper 49 are engaged with each other and viscous drag is imparted to the movable frame 46. Thus, by applying braking force by the rotary damper 49 to the movable frame 46 in the region where inertia becomes large and the movable frame 46 is hardly stopped, the movable frame 46 can be easily stopped. <P>COPYRIGHT: (C)2013,JPO&INPIT |
