| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized, thin, and small-diameter hard disk drive motor which can also be applied to a hard disk having an external diameter of one inch, while assuring higher bearing rigidity. SOLUTION: This inner-rotor type hard disk drive motor supports the rotation of a rotor using a pair of ball bearings. The pair of ball bearings are allocated in parallel in the radial direction so that these bearings are not overlapped on the same axial line and the external circumferential surface of the outer ring of the ball bearing located at the internal side of the radial direction and the internal circumferential surface of the inner ring of the ball bearing are deposited on one another. |
