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:
Jan. 29, 1991
Filed:
Jul. 17, 1986
Nobuhiko Tsukahara, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A disk drive apparatus is provided with a center positioning pin engageable with a center positioning aperture of a magnetic disk, and a drive pin establishing positioning and driving engagement with a driving and positioning opening formed in the disk. The drive pin is supported by a resilient member which is resiliently deformable and is pivotable retative to a turntable. The resilient member is preferably so arranged to cause pivotal movement of the drive pin to have substantially greater radial motion component in comparison with peripheral motion component, or to permit inclination of the drive pin relative to a vertical axis at least in a direction different from the direction of rotation of the turntable by the resilience. With this arrangement, the disk drive apparatus is capable of exerting higher rotational torque with an accuracy in centering of a magnetic disk to be driven and can minimize shifting of chucking point so as not to cause offset of indexes recorded in the disk. Furthermore, the disk drive apparatus can reduce a shock in chucking and whereby minimize or eliminate wear and/or deformation of a drive opening and a drive pin.