Photography – Camera detail – Diaphragm
Reexamination Certificate
2007-03-19
2009-08-04
Perkey, W B (Department: 2862)
Photography
Camera detail
Diaphragm
C396S506000
Reexamination Certificate
active
07568849
ABSTRACT:
A light quantity adjusting device prevents possible violent vibration resulting from an external force. The light quantity adjusting device includes a substrate having an optical path aperture, a blade movably placed on the substrate to restrict the quantity of light passing through the optical path aperture, and an electromagnetic driving device for drivingly opening and closing the blade. The electromagnetic driving device includes a rotating shaft, an arm integrated with the rotating shaft, and a transmission pin provided on the arm. The blade has a cam groove formed therein and engaging the transmission pin. The cam groove includes a continuous groove having a driving area that crosses a pivoting direction of the transmission pin at a predetermined angle to displace the blade and a non-driving area that crosses the pivoting direction of the transmission pin at a substantially right angle to reduce displacement applied to the blade.
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Hayakawa Yukihiko
Masuyama Kenji
Nishimoto Takahiro
Fenwick Warren K
Kanesaka Manabu
Nisca Corporation
Perkey W B
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