| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens fastening structure such that a lens fastening component is exposed on neither the top surface nor the reverse surface of a lens without using any troublesome auxiliary component such as a nut. SOLUTION: The lens fastening structure fixes the lens 5 through the diameter expanding operation of a branch part 1a by fitting the branch part 1a which is longitudinally cut to an end of a lock cylinder 1a provided with a screw groove 1b at a support part 3 for the lens, clamping shallowly and fitting a screw 2 such that the diameter of the head 2c of the screw is made small and the diameter of a pin of the neck part 2b of the screw is made a little larger than the internal diameter of the branch part 1a in a round lens hole 4, and clamping the screw 2 deeply from the reverse side. Further, the lens 5 is fixed to a projection part 1c and a support pa rt 3 on the outer circumferential surface of the lock cylinder across a hollow 7. COPYRIGHT: (C)2004,JPO
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