The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1997
Filed:
Sep. 06, 1996
Yoshinori Ogawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A rotary actuator assembly in a magnetic disk drive unit capable of simultaneously realizing at low costs a reliable lock mechanism for an actuator and the improvement in gap magnetic flux density at both ends in a moving range of the actuator. The rotary actuator assembly includes a base; an actuator arm subassembly rotatably mounted on the base, the subassembly having one end supporting a plurality of magnetic heads and another end supporting a moving coil; and a magnetic circuit fixed to the base, the magnetic circuit constituting a voice coil motor in combination with the moving coil. Further, a latch magnet for locking the actuator arm subassembly is fixed to either the base or the magnetic circuit. The latch magnet has a magnetic pole directed to a center yoke of the magnetic circuit, and the magnetic pole has the same polarity as that of surfaces of an inner magnet and an outer magnet of the magnetic circuit opposed to the center yoke.