Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Phichet Numnual0
Takashi Nakano0
Makoto Mikami0
Date of Patent
December 7, 2010
0Patent Application Number
123685580
Date Filed
February 10, 2009
0Patent Primary Examiner
Patent abstract
A light quantity control device includes: a bottom board having an opening; a first blade, a supporting blade, and a second blade linearly moved in opposing directions and controlling the opening to a fully open state, a fully closed state, and a small aperture state; a driving lever connected to the set of blades and driving the set of blades by rotation of the driving lever; and a stopper restricting a rotational range of the driving lever. The set of blades controls the opening to the small aperture state when the driving lever is positioned at one end of the rotational range defined by the stopper.
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