Spindle motor having an electrostatic discharge path
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United States of America Patent
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Dec 8, 2015
Grant Date -
Dec 26, 2013
app pub date -
Mar 12, 2012
filing date -
Mar 14, 2011
priority date (Note) -
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Abstract
Provided is a spindle motor having an electrostatic discharge (ESD) path that can stably discharge electric charges introduced from the outside to a rotating shaft through a base plate, in a structure of forming a bearing housing by using a resin and insert-molding the base plate. The spindle motor includes: a rotor to the central portion of which one end of a rotating shaft is coupled; a bearing that rotatably supports the rotating shaft; a bearing housing that accommodates the bearing in the inside of a groove and that is made of a resin; and a base plate whose inner circumferential portion is buried and combined in the inside of the bearing housing, wherein part of the base plate is in contact with the bearing to thus discharge externally introduced static electricity through the rotating shaft, bearing, and the base plate.
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