Light shielding structure of a zoom lens barrel

Details Light shielding structure of a zoom lens barrel Light shielding structure of a zoom lens barrel

2008-05-13

2008-05-13

Perkey, W. B. (Department: 2862)

Photography

Having variable focal length of camera objective

C396S082000, C396S448000, C359S695000, C359S821000

Reexamination Certificate

active

07373082

ABSTRACT:
A light shielding structure of a zoom lens barrel includes an outer ring, an intermediate ring and an inner ring which are concentrically arranged, the intermediate ring being movable relative to the outer ring and including at least one through-slot, the inner ring being movable relative to the intermediate ring, and the inner ring including at least one projection which is formed on an outer peripheral surface of the inner ring to be engaged in the through-slot. The light shielding structure is in the form of a light shielding sheet including a fixing portion which is fixed to the inner ring, and at least one resilient light-shielding tongue which projects radially outwards from the fixing portion to pass through the through-slot so that a radially outer end portion of the resilient light-shielding tongue comes in contact with an inner peripheral surface of the outer ring.

REFERENCES:
patent: 5365373 (1994-11-01), Tanaka
patent: 5420656 (1995-05-01), Kohmoto
patent: 5450239 (1995-09-01), Uziie et al.
patent: 6424807 (2002-07-01), Nomura et al.
patent: 6520691 (2003-02-01), Nomura et al.
patent: 6813441 (2004-11-01), Yamazaki
patent: 6919995 (2005-07-01), Nomura et al.
patent: 2004/0141736 (2004-07-01), Nomura
patent: 2004/0156127 (2004-08-01), Nomura et al.
patent: 2004-258642 (2004-09-01), None
English Language Abstract of JP 2004-258642.

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