Magnet type clamping mechanism and disc driving apparatus using the same
US5671210A · kind A · utility
6Cited by
0References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1996 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Feb 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnet type clamping mechanism, a first magnet with a yoke is fixed in the outer periphery of a concave portion of a turn table which is fixed to a motor shaft. In the inner periphery of the concave portion of the turn table, a second magnet is provided on a yoke which is slidable along the shaft within a certain range. With respect to a disc having a hub with a large projection, the first magnet mainly generates clamping force. With respect to a disc having a hub with a small projection, both the first and second magnets generate clamping force, while the second magnet generates a main component of the clamping force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.