Dynamic information storage or retrieval – Dynamic mechanism subsystem – Specific detail of storage medium support or motion production
Patent
1991-07-23
1992-08-11
Levy, Stuart S.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Specific detail of storage medium support or motion production
369271, 360 9912, G11B 1703, G11B 2300, G11B 2500
Patent
active
051386062
ABSTRACT:
A disk drive device incorporated in a disk apparatus has a rotary plate mounted on a rotary drive shaft and a magnet mounted on the rotary plate. A recess is formed in the lower surface of the magnet or the upper surface of the rotary plate. A swingable lever having a first end portion pivotally connected to the rotary plate is accommodated in the recess. A second end portion of the swingable lever carries a disk drive pin movably disposed in an opening formed in the magnet. Before the disk drive pin engages with a drive pin engagement hole of a disk, the disk drive pin is depressed in a direction parallel to the axis of the rotary drive shaft by the disk magnetically attracted by the magnet toward the rotary plate. At this time, the second end portion of the swingable lever resiliently deforms away from the magnet. The rotary plate is formed therein with an opening for receiving the deformed second end portion of the swingable lever, thus allowing the thickness of the entire device to be reduced.
REFERENCES:
patent: 4667257 (1987-05-01), Chan
patent: 4700245 (1987-10-01), Sakaguchi
patent: 4742408 (1988-05-01), Kumagai
patent: 4855850 (1989-08-01), Nakaoka et al.
patent: 4864442 (1989-09-01), Miyazawa et al.
patent: 4903155 (1990-02-01), Maekawa et al.
patent: 5010427 (1991-04-01), Taguchi et al.
Levy Stuart S.
Matsushita Electric - Industrial Co., Ltd.
Pham Tien Ba
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