Record disk cartridge-shutter combination
US4780784A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0308
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A record disk cartridge (34) is disclosed for use in a disk drive unit wherein the cartridge has a compartment containing a record disk (10) therein. The cartridge (34) has aperture means (42) (44) for insertion therethrough of a transducer head of the disk drive unit and through which the record disk can be engaged for rotation. A shutter mechanism (46) (48) associated with the aperture means is movable between an aperture-closed position at least partially closing the aperture means, and an aperture-opened position opening the aperture means. The shutter mechanism is biased by a spring (52) toward its aperture-closed position. An abutment member (54) of the disk drive unit enters into the cartridge to a position within the outer circumference of the record disk when the cartridge is moved to its recording position. The abutment member engages surface means (56) (58) (59) (61) on a shutter blade (48) of the shutter mechanism to move the shutter mechanism from its aperture-closed position to its aperture-opened position as the cartridge is moved to its recording position. The tensioned spring (52) of the shutter mechanism holds the shutter mechanism in its aperture-opened position …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.