Patent ID: 8023224
Filing Date: 2011-09-20
Classification: G11B

Abstract:
1. A hard disk drive comprising: a base; a cover coupled to an upper portion of the base; a spindle motor including a fluid dynamic bearing having a fixing portion fixed to the base and a rotation portion partially inserted in an inside of the fixing portion, the rotation portion to rotate about a first axis with respect to the fixing portion, a hub to support a disk and having an end portion coupled to the rotation portion to rotate with the rotation portion, and a power generation portion to generate power to rotate the hub; and an anti-stick portion to prevent a restriction of rotation of the rotation portion, the anti-stick portion including a stopper located on the cover and a protruding end portion protruding from an upper end of the rotation portion, the stopper including side walls surrounding the protruding end portion along a first plane perpendicular to the first axis, wherein the protruding end portion contacts the side walls before the rotation portion contacts the fixing portion when the rotation portion moves in a direction along the first plane.