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:
Feb. 25, 2014
Filed:
Dec. 22, 2011
Kenichi Yoshida, Tokyo, JP;
Shigeya Takahashi, Tokyo, JP;
Kazuaki Nawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic head is controlled more stably when retracted from above a magnetic disk. When a permanent magnet memberhaving a protrusion projecting from the longer periphery to a side opposite to the center of a fan is mounted on a yoke, the end part P side where the sum of thicknesses (P+P) is the largest, i.e., the upper face side of a magnet matrixon the protrusion side, is higher than the upper face side of the magnet matrix in the other area. Therefore, since the magnet matrixin the protrusion is located closer to a lock pin, the magnetic attraction force between the lock pinand the permanent magnet memberbecomes stronger, so that the permanent magnet memberis locked more firmly when retracted from above the magnetic disk (at the time of locking), whereby the stability can be enhanced.