Patent ID: 7391680

Claim:
An optical pickup system for use with a disk, comprising: an optical pickup head to transfer data with respect to the disk; a slider to which the optical pickup head is attached; a stepping motor to provide a torque; a lead screw coupled to the stepping motor and having spiral grooves formed on an outer periphery of the lead screw, the spiral grooves being engaged to the slider to move the optical pickup head in a radial direction of the disk according to the torque; a main base; a bracket which rotatably supports the lead screw relative to the main base; a plurality of guide shafts installed on the main base to be substantially parallel with the lead screw and which guide the optical pickup head in the radial direction of the disk; and a positioning mechanism which supports the bracket relative to the main base and which is installed on the main base to allow the bracket to move in a plurality of directions relative to the main base to automatically maintain a position of the lead screw relative to the slider to minimize a load applied to the stepping motor due to a misalignment between the lead screw and the stepping motor.