Spindle motor with a magnetic shield plate having an inclined annular face
US7911734B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2006 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Jul 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A disc driving motor of the invention includes a base, a hub having a ring-shaped disc receiving face on which a disc is placed, a hydrodynamic bearing rotatably supporting the hub, a motor unit mounted on the base, the motor unit having an outer diameter larger than that of the disc receiving face and applying a rotational force to the hub, and a magnetic shield plate disposed on an axial clearance formed between the disc and the motor unit when the disc is placed on the disc receiving face. The magnetic shield plate has an opposed face opposed to the disc when the disc is placed on the receiving face, the opposed face being inclined toward the disc receiving face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.