| 摘要 |
PROBLEM TO BE SOLVED: To optimize the number of guide shafts, when the fitting length of bearing parts formed on 1st and 2nd lens frames respectively can be set as long as possible. SOLUTION: Regarding the lens barrel, respective bearing parts 41a and 71b, formed on the 1st and 2nd lens frames 41 and 71 with a prescribed fitting length, are separately fitted to two long-sized guide shafts 90 and 90, and also, in the 1st and 2nd lenses, among idle bearing parts 41b and 71a, having short fixing length and formed so as to adjust the axis-to-axis distance; one idle bearing part 41b is idly fitted to one of the two long-sized guide shafts 90 and 90; and the other idle bearing part 71a is fitted idly to one short-sized guide shaft 91. COPYRIGHT: (C)2006,JPO&NCIPI
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