Patent ID: 7593182
Filing Date: 2009-09-22
Classification: G11B,H02K

Abstract:
1. A motor unit comprising: a motor having a stator, a bearing portion, and a rotor supported by the bearing portion so as to be rotatable around a central axis with respect to the stator, the rotor having a disk supporting portion configured to support a recording disk such that the disk is rotated by the motor; and a housing member having an upper side where a recording disk supported by the rotor is housed, and a lower side comprising a sheet member and a base through which a circular opening extends; wherein the center of the circular opening in the base is situated on the central axis, wherein part of the bearing portion of the motor is received in the circular opening, wherein the sheet member has an upper surface and a lower surface, the upper surface of the sheet member being bonded to a lower surface of the base, wherein one of the bearing mechanism portion and the housing member has a raised portion located radially inwardly of the sheet member, and wherein the raised portion has a lower surface offset, in an axial direction extending along the center axis from the upper side of the housing member toward the lower side, from the lower surface of the sheet member, whereby the raised portion protrudes axially outwardly beyond the lower surface of the sheet member.