Disk positioning and ejection device in a disk drive
US4040107A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Apr 21, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A flexible disk is automatically coupled to a drive spindle following insertion in the drive, but decoupled and ejected on command. The positioning and ejection control runs through a three-phase cycle which halts at the end of the positioning phase and is terminated at the end of the ejection phase while disk de-coupling and ejection phases follow directly. The ejection device has an override if an obstacle holds the disk in the drive. The three-phase cycle is cam-operated, using a motor drive cam assembly whose shaft extends in the direction of disk insertion and ejection and parallel to the hinge axis of a cam-operated disk positioning hub carrier. A cam pin on the shaft actuates the disk ejection and additional cams control stop switches for the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.