Spindle motor and disk drive apparatus
US8468554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2012 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Feb 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/1675
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spindle motor includes a shaft, a cone, a turntable provide with a disk support portion, a cylindrical closed-top rotor holder, a rotor magnet, a stator, and a bearing mechanism. The cone includes a disk holding surface inclined radially outward and downward. The turntable further includes a resin-made table body having a disk support portion and an annular groove portion depressed upward at a lower side of the disk support portion, a plurality of balls rotatably arranged within the annular groove portion, an annular closure portion arranged between the table body and the rotor holder to close a lower opening of the annular groove portion, and a disc-shaped portion arranged radially inward of the annular groove portion of the table body, the disc-shaped portion having an upper surface bonded to the table body by an adhesive agent and a lower surface bonded to the rotor holder by the adhesive agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.