Abstract: A magnetic suspension bearing located between the spindle and stator of a rotational device includes stator magnetic units mounted on the top side and bottom side of the stator and spindle magnetic units, which are mounted on two ends of the spindle. One end of the spindle has a loading section to support the spindle. The stator magnetic units and the spindle magnetic units generate a repulsive magnetic force to separate the spindle and stator from one another at a selected distance to avoid vibration and noise caused by obliquity and to increase the service life of products.

Abstract: A magnetic suspension bearing located between the spindle and stator of a rotational device includes stator magnetic units mounted on the top side and bottom side of the stator and spindle magnetic units, which are mounted on two ends of the spindle. One end of the spindle has a loading section to support the spindle. The stator magnetic units and the spindle magnetic units generate a repulsive magnetic force to separate the spindle and stator from one another at a selected distance to avoid vibration and noise caused by obliquity and to increase the service life of products.

Abstract: A disc clamp mechanism for preventing a disc (e.g., DVD-ROM or CD-ROM) from slipping and/or loosening in a high speed rotation comprises a positioning member sized to the center hole of the disc having a hole for being mounted on a turntable, and an inclined surface; a helical spring within the positioning member; a disc-clamping member sized to the center hole of the compact disc having circumferential raised portions, recessed portions each extending from the raised portion, and flexible V-shaped members surrounded by two recessed portions and a raised portion; and an elastic plane-like member mounted on the positioning member. As such, the disc is secured by the raised portions, the inclined surface, and the turntable when loaded onto the disc-clamping member. This mechanism finds applications in the DVD-ROM or CD-ROM products. Further, a thinner construction, an easy assembly, and a high positioning precision are realized by this mechanism.