| 摘要 |
PROBLEM TO BE SOLVED: To provide an image blurring correcting optical device using a locking mechanism small in size and light in weight for the locking mechanism of a correction lens barrel. SOLUTION: A ring-like locking member 16 where three locking arms 16a are formed in the inside and that is formed of a shape memory alloy is arranged outside the holding frame 11 of a correction lens, and the locking contact part 16b of the top end of the locking arm 16a is pressed toward the center of the ring-like locking member by a coil spring 17. The locking member 16 formed of the shape memory alloy previously stores a specified shape so as to set the locking arm 16a at a retreating position, and the locking contact part 16b of the locking arms is brought into press-contact with the holding frame 11 of the correction lens from outside by the pressing force of the coil spring 17 in a nonheated state, and locks and holds the holding frame 11. Also, the locking arm 16a is moved to the retreating position in a heated state, so that the locking of the holding frame 11 is released. |
