Patent ID: 9190880
Filing Date: 2015-11-17
Classification: F16C,G11B,H02K

Abstract:
1. A spindle motor for use in a disk drive apparatus, the spindle motor comprising: a housing defining an interior space; a bearing mechanism including a shaft portion extending in an axial direction; a stationary portion including a base portion defining a portion of the housing; and a rotating portion configured to rotate about a central axis with respect to the stationary portion through the bearing mechanism; wherein the base portion includes a through hole in which the bearing mechanism is fitted; a fixing region is located between an inner circumferential portion of the base portion which defines the through hole and an outer circumferential portion of the bearing mechanism; the fixing region includes: the inner circumferential portion of the base portion has, at least in the second region, a degree of surface roughness greater than a degree of surface roughness of the outer circumferential portion of the bearing mechanism; the seal gap gradually decreases in radial width with increasing height, and includes an adhesive along an entire circumference of the seal gap; the shaft portion includes a columnar shaft extending along the central axis; and the fixing region is located between the inner circumferential portion of the base portion and an outer circumferential portion of the shaft.