| 摘要 |
PURPOSE:To extremely simplify the structure by changing an interval of a lens group by using a link mechanism which is operated as a lens barrel moves. CONSTITUTION:A cam lever 20 is attached pivotally to an eccentric pin 24 in its center part, and when a movable table 14 is moved along a guide shaft 15 by a driving mechanism, a cam follower 21 slides in a cam groove 22, and the cam lever 20 is oscillated by using a pivotally supporting pin 17 as a supporting point. By following this oscillation, the eccentric pin 24 moves in the upper and lower direction and brings link levers 16, 18 to opening/closing oscillation by using the pins 17, 19 as supporting points. By following this opening/closing oscillation of the link levers 16, 18, mirror frames 8, 9 move, respectively, in a lens barrel in the approaching or separating direction along the optical axis. |
