Pickup with asymmetrically arranged lens for accessing moving storage media and drive having the pickup
US8117631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2007 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Oct 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0956
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pickup for accessing moving storage media carrying substantially parallel information tracks has a carrier, an actuator with a lens and suspension wires extending from the rear of the carrier and joining the carrier and the actuator. The actuator is movable in the focus direction and in a tracking direction and has a substantially rectangular flat board carrying the lens and a counter weight. The flat board is arranged orthogonal to a focus direction and carries tracking and focus coils. The pickup has a magnet configuration connected to the carrier with at least two tracking magnets, which are arranged in the tracking direction at opposite sides of the flat board and extend orthogonal to the focus direction above and/or under the flat board, and with at least two focus magnets, which are arranged in front of and behind the flat board and extend orthogonal to the direction of the tracks. According to the invention, the lens is arranged asymmetrically in reference to an axis through a center of the flat board parallel to the direction of the tracks while the lens and the counter weight are symmetrically arranged in reference to the center of the flat board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.