Abstract: A disc grabbing device including a body, a drive shaft, a first cam, a second cam, multiple first movable parts and multiple second movable parts are provided. The drive shaft is rotatably disposed in the body. A first cam and a second cam are disposed on the drive shaft, and rotate together with the drive shaft. The first movable parts are disposed in the body and correspond to the first cam, and move to a disc hold position or a disc release position along with the rotation of the first cam. The second movable parts are disposed in the body and correspond to the second cam, and move to a disc release position or a disc hold position along with the rotation of the second cam.

Abstract: Disclosed is a spindle motor in use for a disk drive and a mobile communication system using the same. The spindle motor comprises a circuit board, a cylindrical housing fixedly mounted on the circuit board and allowing a shaft to be rotatably inserted into the housing, a plurality of grooves formed in an inner periphery of the housing, and a molybdenum disulfide film formed through penetration in the inner periphery of the housing including the grooves. The molybdenum disulfide film and the grooves serve as lubricant to the shaft during rotation of the shaft. An armature is arranged on the circuit board adjacent to an outer periphery of the housing and having lamellar conductors laminated one atop another. A rotor is integrally fixed to the shaft, and has a turntable arranged in a top portion thereof for seating a disk and a magnet arranged in an underside portion thereof for cooperating with the armature to generate electromagnetic force to turn the rotor.