Patent ID: 9721608
Date: 2017-08-01
CPC Classifications: F16C,G11B,H02K

Claim:
1. A spindle motor for use in a disk drive apparatus, the spindle motor comprising: a rotating portion including a rotor magnet, and arranged to rotate about a central axis extending in a vertical direction; a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about the central axis; a stator portion arranged opposite to the rotor magnet; a housing arranged to accommodate the rotating portion, the bearing mechanism, and the stator portion therein; and a sealing member; wherein the housing includes a base portion substantially in a shape of a plate and arranged to extend radially below the rotating portion; the base portion includes a first lower surface arranged to face downward, and a through hole arranged to pass through the base portion in the vertical direction and arranged to have a portion of the bearing mechanism arranged therein; the sealing member is arranged to cover a lower side of the through hole, and includes at least a metal layer; the base portion includes an inner circumferential portion arranged to define the through hole; a fixing region at which the bearing mechanism and the base portion are fixed to each other and at least one sealing region are defined between an outer circumferential portion of the bearing mechanism and the inner circumferential portion of the base portion; at the fixing region, the outer circumferential portion is fixed to the inner circumferential portion; at each of the at least one sealing region, a radially extending seal gap is defined between the bearing mechanism and an edge of the through hole; and the seal gap is arranged to have a sealant arranged therein.