Abstract: A spindle motor in an optical disc player includes a motor having a rotation shaft, a turntable rotating together with the rotation shaft and having a track groove having a circular shape, moving members disposed in the track groove to move along the track groove to compensate for an eccentric force, a collision and dispersion inducing unit having a height from the track groove to induce a rebounding phenomenon between the moving members to be spaced-apart from each other when the moving members are arranged in a non-uniform displacement due to a centrifugal force and a friction between the track groove and the moving members.

Abstract: A spindle motor in an optical disc player includes a motor having a rotation shaft, a turntable rotating together with the rotation shaft and having a track groove having a circular shape, moving members disposed in the track groove to move along the track groove to compensate for an eccentric force, a collision and dispersion inducing unit having a height from the track groove to induce a rebounding phenomenon between the moving members to be spaced-apart from each other when the moving members are arranged in a non-uniform displacement due to a centrifugal force and a friction between the track groove and the moving members.

Abstract: The present invention relates to a method and apparatus for cleaning air in a hard disk drive by gathering the air in the upper and lower portion of the disk and discharging it outwardly through the air discharging position in order to maintain an optimum condition of the air space and reduce the error rate of the hard disk drive.

Abstract: Disclosed is a spindle motor of drive system for driving a disk such as a hard disk. The spindle motor can prevent impurities from flowing thereinto and avoid contamination caused by dispersion of a lubricating oil such as grease filled in a bearing thereof. The spindle motor of the disk drive for reproducing or recording information from or onto a disk has a stator core installed on a shaft of a housing, bearings mounted on both lower and upper portions of the shaft, and a hub for mounting the disk. The hub has a magnet at an inner circumference thereof. The shaft has an air inlet opening which is transversely formed in the shaft and an air flow opening which is formed at a center of the shaft. The air flow opening is communicated with the air inlet opening at a right angle. A spiral sealing member is installed at a center of an upper portion of the hub.

Abstract: The invention relates to a structure of a spindle motor. The spindle motor comprises a housing assembly having a cylindrical hub and a stator secured onto a circumferential outer surface of the cylindrical hub, a spindle hub having a rotor magnet secured onto a circumferential inner surface thereof, a rotating shaft passing through the spindle hub and extending into space defined in the cylindrical hub, a plurality of first permanent magnets fitted onto a circumferential outer surface of the rotating shaft and having opposed magnetic polarities in upper and lower direction, and a plurality of second permanent magnets fitted onto a circumferential inner surface of the cylindrical hub and having opposed magnetic polarities in upper and lower direction, whereby the rotating shaft can be rotated without any frictional contact, in a state being floated by magnetic repulsion and attraction induced by the first and second permanent magnets.

Abstract: The invention relates to a structure of a spindle motor. The spindle motor comprises a housing assembly arranged downward of a cover and having an inner cylindrical portion; a stator secured to circumferential outer surface of the inner cylindrical portion of the housing assembly; a spindle hub provided above the housing assembly and having an outer cylindrical portion; a rotor magnet secured to circumferential inner surface of the outer cylindrical portion of the spindle hub; a hydrodynamic bearing formed in the inner cylindrical portion of the housing assembly; a rotating shaft having one end secured to the spindle hub to integrally rotate with the spindle hub and the other end positioned in the hydrodynamic bearing; and restrainer disposed between the cover and the one end of the rotating shaft to restrain axial movement of the rotating shaft to a predetermined extent.