Electromagnetic device and switching device using same
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United States of America Patent
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Mar 22, 2016
Grant Date -
Jan 22, 2015
app pub date -
Oct 18, 2012
filing date -
May 21, 2012
priority date (Note) -
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Abstract
An electromagnetic device includes: a fixed iron core; a movable iron core which is disposed to face the fixed iron core and which is displaceable in an axis line direction of the drive shaft; an electromagnetic coil; a permanent magnet which retains the movable iron core at the advanced position; supporting posts which are provided parallel to the axis line direction on both side surfaces of the fixed iron core and support the fixed iron core; an opening-side plate which is provided at one end portion of the supporting post; and a closing-side plate which is provided at the other end portion of the supporting post, wherein the advanced position of the movable iron core is restricted by the fixed iron core and the retreated position is restricted by the opening-side plate.
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