Patent ID: 9064529
Filing Date: 2015-06-23
Classification: G11B

Abstract:
1. A spindle motor and recording disk combination including a through hole at a center thereof and an annular clamper installed thereon, the spindle motor comprising: a rotating portion including a rotor hub and a magnet fixed to the rotor hub, and configured to be rotatable about a central axis extending in a vertical direction; and a stationary portion including a stator opposite to the magnet with a gap intervening therebetween; wherein the rotor hub includes: the flange portion includes a disk mount surface contacting with at least a portion of a lower surface of the recording disk; the cylindrical portion includes a first screw portion positioned in an outer circumferential portion of the cylindrical portion; the clamper includes an annular raised portion configured to be fitted in the through hole of the recording disk; an inner circumferential portion of the clamper includes a second screw portion configured to be screwed to the first screw portion; at least a portion of the second screw portion is positioned in an inner circumferential portion of the annular raised portion; the first screw portion includes at least one of a screw groove and a screw thread; the second screw portion includes at least one of a screw groove and a screw thread; and an axial position of at least a portion of the second screw portion overlaps with an axial position of the recording disk.