Focal plane shutter, imaging device and digital camera
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United States of America Patent
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Jul 19, 2016
Grant Date -
Oct 30, 2014
app pub date -
Jul 8, 2014
filing date -
Jun 15, 2012
priority date (Note) -
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Abstract
A focal plane shutter includes: a board including an opening; a leading shutter and a trailing shutter opening and closing the opening; first and second biasing members respectively biasing the leading shutter and the trailing shutter to move away from the opening; a first actuator causing the leading shutter to move from a position to close the opening to a position to recede from the opening while the leading shutter is assisted by a biasing force of the first biasing member in an exposure operation; and a second actuator causing the trailing shutter to move from a position to recede from the opening to a position to close the opening against a biasing force of the second biasing member in the exposure operation, wherein drive torque of the first actuator is smaller than that of the second actuator.
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