Rotation structure
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United States of America Patent
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Jul 3, 2012
Grant Date -
Sep 16, 2010
app pub date -
Jul 21, 2009
filing date -
Mar 13, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotation structure rotates a rotatable segment via the attraction between a number of electromagnetic elements disposed on another rotatable segment around a screw and a magnet disposed on another rotatable segment. The rotated angle of the rotatable segment can be controlled by selectably magnetizing the electromagnetic elements in response to an instruction generated by pressing a button formed on another rotatable segment.
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