Patent ID: 6532205
Filing Date: 2003-03-11
Classification: G11B

Abstract:
A disk centering apparatus, comprising:a disk table member including a substantially cylindrical inner circumferential element secured to an upper portion of a motor shaft and a substantially annular outer circumferential element disposed lower than an upper surface of and concentrically with said inner circumferential element and having a diameter greater than that of said inner circumferential element, said outer circumferential element having an upper surface which serves as a receiving face for receiving a disk thereon, said disk table member further including a plurality of connecting elements extending radially from an outer side of said inner circumferential element to connect said inner circumferential element and said outer circumferential element to each other; and a movable member including a substantially cylindrical supported shaft element mounted for sliding movement on said motor shaft, said supported shaft element being disposed lower than said disk table member, said movable member further including a guiding element provided adjacent an outer circumferential surface side of said supported shaft element for movement together with said supported shaft element and fitted in a space defined by said inner circumferential element, said outer circumferential element and said connecting elements of said disk table member, said guiding element having a guiding inclined element formed at an upper portion thereof for guiding a center hole of the disk, said guiding inclined element having a diameter greater than that of said inner circumference element of said disk table member, said movable member being biased upwardly in a direction of said motor shaft.