Lens barrier mechanism of a lens barrel

Details Lens barrier mechanism of a lens barrel Lens barrier mechanism of a lens barrel

2009-06-22

2010-06-22

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S700000, C359S701000

Reexamination Certificate

active

07742237

ABSTRACT:
A lens barrier mechanism of a lens barrel includes a cam ring including a forward-projecting portion; a linearly movable barrel provided outside the cam ring and moves linearly by rotating the cam ring; a barrier blade provided in the linearly movable barrel and movable in an operating plane orthogonal to the optical axis to open and close an opening at the front of the linearly movable barrel; and a barrier drive mechanism which opens and shuts the barrier blade when the lens barrel moves from/to the accommodated state to/from the ready-to-photograph state, respectively. A range of opening/shutting operation of the barrier blade extends radially outside an inner periphery of the forward-projecting portion. In the accommodated state, the forward-projecting portion intersects the operating plane of the barrier blade but is positioned outside the range of opening/shutting operation of the barrier blade.

REFERENCES:
patent: 5170294 (1992-12-01), Haraguchi et al.
patent: 5659810 (1997-08-01), Nomura et al.
patent: 7088524 (2006-08-01), Nomura et al.
patent: 2009/0231731 (2009-09-01), Sasaki
patent: 2009/0231732 (2009-09-01), Sasaki
patent: 2009/0232485 (2009-09-01), Sasaki
patent: 2009/0257137 (2009-10-01), Yamano
patent: 2000-292670 (2000-10-01), None
U.S. Appl. No. 12/263,694 to Nomura et al., which was filed on Nov. 3, 2008.
U.S. Appl. No. 12/263,710 to Nomura et al., which was filed on Nov. 3, 2008.
English language Abstract of JP 2000-292670, Oct. 20, 2000.
English language machine translation of JP 2000-292670, Oct. 20, 2000.

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