| Abstract | A magneto-optical positioning apparatus for synchronously positioning both a magnetic pickup device and an optical pickup device over the tracks of a disc and including an arm member, a magnetic head, a pair of parallel first support links, each of the first support links being integrally formed with and hinged at one end to the arm member and hinged at another end to the magnetic head, the first support links forming a first parallelogram linkage allowing the magnetic head to follow fluctuations of the disk in a plane perpendicular to a recording surface of the disc while maintaining the magnetic head parallel to the recording surface, a base support, and a pair of parallel second support links, each of the second support links being integrally formed with and hinged at one end to the arm member and hinged at another end to the base support to form a second parallelogram linkage for raising and lowering the arm member towards and away from the recording surface of the disk while maintaining the arm substantially parallel with the recording surface of the disc, and wherein the first support links are arranged one above the other relative to the recording surface of the disc and the second support links are arranged one above the other relative to the recording surface of the disc. |
