Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1989-08-11
1991-08-20
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 9702, G11B 555
Patent
active
050419358
ABSTRACT:
A rotary actuator for positioning magnetic heads in a disk drive, comprising a stator assembly and a rotor assembly. An arm assembly having magnetic heads are fixed to the rotor assembly, which rotates back and forth within a limited angle range around a fixed axis of the rotary actuator due to the forces between plural magnets and driving current which flows though flat coils. Two flat coils are aranged on an arcuate inner surface of the stator such that two adjacent vertical parallel portions thereof closely contact with each other. Two flat coils have an electrical connection with a driving source that the currents through the two adjacently parallel portions flow in the same direction. Three permanent magnets are disposed on the rotor surface, the central magnet having a greater lateral width than that of other two side magnets, and a polarity of the central magnet is opposite to that of other magnets. In another embodiment, each of flat coils comprises an inner coil and an outer coil resulting in enhancing the torque of the rotary actuator. Several modifications of coil and permanent magnet arrangement, and other related improvements in the structure thereof are also disclosed.
REFERENCES:
patent: 4346416 (1982-08-01), Riggle
patent: 4933792 (1990-06-01), Sleger
Aruga Keiji
Imamura Takahiro
Maeda Hiroshi
Suzuki Norihiko
Yamada Tomoyoshi
Fujitsu Limited
Heinz A. J.
LandOfFree
Rotary actuator for positioning magnetic heads in a disk drive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary actuator for positioning magnetic heads in a disk drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary actuator for positioning magnetic heads in a disk drive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1012361