Patent ID: 8908324
Filing Date: 2014-12-09
Classification: G11B,H02K,Y10T

Abstract:
1. A spindle motor of a disk drive apparatus, the spindle motor comprising: a rotating portion including a rotor magnet, and configured to rotate about a central axis extending in a vertical direction; a stationary portion; and a bearing mechanism supporting the rotating portion such that the rotating portion is rotatable with respect to the stationary portion; wherein the stationary portion includes: the stator includes: the plurality of coils include three coil groups; each coil group includes one or more of the plurality of coils which are each defined by a single conducting wire; on the upper side of the base portion, a joint portion where at least two of three common wires are joined together to define a single common wire is provided, so that the three common wires become one or two common wire elements, each common wire being one end portion of the conducting wire defining a separate one of the three coil groups; each of the one or two common wire elements and three lead wire elements is passed through a separate one of the plurality of base through holes to reach a lower side of the base portion, each lead wire element being an opposite end portion of the conducting wire defining a separate one of the three coil groups; and each of the plurality of base through holes includes a sealing portion where a sealant is positioned between an inner circumference of the base through hole and an entire circumferential extent of a surface of a corresponding one of the wire elements.