Optical: systems and elements – Lens – With variable magnification
Patent
1990-12-17
1993-07-06
Arnold, Bruce Y.
Optical: systems and elements
Lens
With variable magnification
359703, 359823, G02B 1514, G02B 702
Patent
active
052259382
ABSTRACT:
A guide apparatus is provided for a rotatable cam ring which has inner cam grooves in which cam pins, which are provided on a movable member and are biased to project in the radial direction of the cam ring, are fitted. The movable member is provided with cam pin supporting holes in which the cam pins are radially movably held and leaf spring holding portions corresponding to the cam pin supporting holes. The apparatus includes leaf springs which are engaged at one end by the leaf spring holding portions and which are provided with cam pin holding portions in which cam pins fitted in the cam pin supporting holes are held. The leaf spring are elastic, so that when the leaf springs are engaged at one end by the leaf spring holding portions, the leaf springs are elastically deflected at their other ends in a radial outward direction.
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Arnold Bruce Y.
Asahi Kogaku Kogyo Kabushiki Kaisha
Nguyen Thong
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