Patent ID: 8677382
Filing Date: 2014-03-18
Classification: G11B

Abstract:
1. A disc clamping mechanism comprising with a spindle motor having a turntable on which a disc is placed and which rotates united with a rotary shaft, a clamper which is positioned on an upper portion of said spindle motor, a disc guide that guides an inner edge of said disc; a clamping magnet which is disposed in an inner diameter of said disc guide, a cylindrical member which is fixed to an upper portion of said rotary shaft, wherein said cylindrical member has a first bottom face that faces said clamping magnet in the axial direction with a first gap therebetween, and said first bottom face, in a state in which said clamper presses a disc in contact with the top of said turntable, is positioned below a facing part of said clamper which faces said clamping magnet in the axial direction.