Pivot assembly bearing device and magnetic head actuator using the same
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United States of America Patent
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Oct 18, 2016
Grant Date -
Aug 20, 2015
app pub date -
Feb 10, 2015
filing date -
Feb 14, 2014
priority date (Note) -
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Abstract
A ball bearing (rolling bearing) containing lubricant sealed therein is provided between a shaft and a sleeve. A labyrinth seal (seal gap) is provided at an end portion of the shaft or the sleeve in the axial direction. A permanent magnet is disposed such that a magnetic pole is located in proximity to the labyrinth seal. A magnetic seal effect that utilizes diamagnetism acting on evaporating oil is provided at the labyrinth seal.
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