Apparatus for centering, aligning and clamping an optical disc
US4649531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Apr 19, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/0282
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a device (27) for centering, aligning and clamping a rigid optical disc (29) in an operating position on a disc drive unit, which disc has a center hole which is bounded by a wall (88). The device comprises a rotatable drive spindle (57) with a centering device (63) which is situated near its free end (59) and which comprises a plurality of radially movable centering members (65) and which are pivotally connected to the drive spindle and which each comprise at least one centering surface (65b), which centering surfaces are pressed against said wall of the disc in the operating position of the disc. The centering members each comprise a radial limb (73) having an end (73a) which cooperates with a sliding bush (75) which is arranged coaxially around the drive spindle, and there are provided actuating means (83) for axially sliding the sliding bush from a first position, in which the centering members are in an operating position to center and clamp the disc, to a second position in which the centering members are in a more inward release position to mount or remove the disc. Further, there are provided resilient means (77) for returning the sliding bush from …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.