| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens frame device small in the number of parts, easy to be assembled and advantageous in miniaturization. SOLUTION: A 1st group supporting frame 11 for a 1st group lens and a 2nd group frame 14 for a 2nd group lens are incorporated with a zoom lens barrel as the lens frame device, a sleeve 15 is fixed to the 1st group supporting frame 11, and a guide groove 11e is arranged on the opposite side. A guide shaft 16 which is freely slidably fitted into the sleeve 15 is fixed to the 2nd group frame14, and a projecting part 14c which is freely slidably fitted to the guide groove 11e is arranged in the 2nd group frame 14. The 2nd group frame 14 is supported by the guide shaft 16 so that it can slide in the direction of an optical axis O while the rotation around the optical axis O is controlled by the projecting part 14c. The frame member moving/supporting mechanism is made simple in configuration, small in the number of parts and compact in size.
|
