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:
Aug. 25, 1998
Filed:
Feb. 10, 1997
Hiroaki Takeuchi, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A shaft is fixed on a fixed drum, and a rotary drum is supported rotatably on the shaft. Parallel plate springs are supported by the rotary drum, and at movable portions of the plate springs, a permanent magnet is gripped and a magnetic head is supported. A yoke having a wall surface opposing to both side surfaces of the permanent magnet with a prescribed distance therebetween is fixed on the fixed drum. A first coil is mounted and fixed to oppose to one side surface of the permanent magnet with a prescribed space, and a second coil is attached and fixed to oppose to the other side surface with a prescribed space therebetween, on the yoke. Accordingly, responsiveness in dynamic tracking operation at the time of signal reproduction can be improved, and vibration of the magnetic head during signal recording can be prevented.