| 摘要 |
PROBLEM TO BE SOLVED: To highly accurately drive and also easily adjusting the position of an optical element of a lens barrel which retreats to a position different from a photographing optical axis, and also moves backward in a storage state. SOLUTION: As for the lens barrel, a rocking member is rotatably supported by a rotating center shaft arranged inside a straight advancing/retreating ring, and a retreat optical element supported by the rocking member is made to retreat with rotation from a photographing position to a retreat position in accordance with the retreating action of the straight advancing/retreating ring at a storage time, the lens barrel is provided with a pair of shaft supporting plates for supporting the front and rear end parts of the rotating center shaft, a supporting plate fixing means, a pair of 1st oblong holes, a pair of mutually parallel front and rear 2nd oblong holes orthogonal to the 1st oblong holes, 1st and 2nd eccentric shaft members fitted in the 1st and 2nd oblong holes, and a shift guiding means for controlling the shifting direction of each shaft supporting plate, and the 1st and 2nd oblong holes in at least one of the shaft supporting plates function as through-holes in the optical axis direction, and an operation part which can be operated with rotation from the front or rear opening part of the straight advancing/retreating ring is arranged at the end part of the eccentric pin on the side fitting in the through hole of the eccentric shaft member. COPYRIGHT: (C)2004,JPO&NCIPI |
