Vibration electricity generation device
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United States of America Patent
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Jun 27, 2017
Grant Date -
Sep 24, 2015
app pub date -
May 29, 2015
filing date -
Jan 22, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A vibration electricity generation device according to an embodiment of the present invention includes a fixed unit provided with a coil and a movable unit provided with a magnet. The movable unit is supported on the fixed unit in a suspended manner via a pair of coil springs. The movable unit is thus configured to vibrate in the up and down direction with a rather simple structure. A coil supporting member of the fixed unit is configured to cover a coil accommodating portion from both thickness direction sides thereof and a friction reducing treatment is applied to the surfaces of both thickness direction sides of the coil supporting member. The coefficient of kinetic friction is thus maintained low enough and a pair of guide shafts conventionally used are not required, thereby the electricity generation efficiency being improved.
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