| US 7,593,182 B2 | ||
| Recording disk driving device motor unit having a sheet member attached to a base | ||
| Takehito Tamaoka, Kyoto (Japan); and Hiroomi Ogawa, Ichinomiya (Japan) | ||
| Assigned to Nidec Corporation, Kyoto (Japan) | ||
| Filed on Feb. 24, 2006, as Appl. No. 11/307,815. | ||
| Claims priority of application No. 2005-050643 (JP), filed on Feb. 25, 2005. | ||
| Prior Publication US 2006/0221495 A1, Oct. 05, 2006 | ||
| Int. Cl. G11B 17/02 (2006.01); H02K 21/02 (2006.01) | ||
| U.S. Cl. 360—99.08 | 22 Claims |
| 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.
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