Apparatus and method for a radial access mechanism for a disk pl

Details Apparatus and method for a radial access mechanism for a disk pl Apparatus and method for a radial access mechanism for a disk pl

1992-09-28

1994-01-11

Look, Edward K.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369220, G11B 1730

Patent

active

052788202

ABSTRACT:
In a disk player/recorder apparatus, a radial access mechanism is disclosed in which a first guide rod is positioned on a mounting plate accurately with respect to the information storage medium. A head assembly engages the first guide rod through bushings which provide stringent tolerance requirements. The position of the head assembly is accurately controlled by the position of the first guide rod and the tolerances on the bushings. A second guide rod coupled to the mounting plate and a single bushing also supports and guides the head assembly, however, the tolerances on the components associated with the second guide rod are less stringent. Coupled to each of the guide rods is a bracket with a permanent magnet coupled thereto. The permanent magnets interact with the coils of linear motors coupled to the head assembly. The linear motors are arranged to minimize torque on the head assembly. The brackets and the guide rods form magnetic circuits for the associated permanent magnets and linear motors. Because of the reduced number of parts and the reduced tolerance requirements, the assembly of the radial access mechanism is simplified.

REFERENCES:
patent: 4320493 (1982-03-01), Kikuchi et al.
patent: 4453245 (1984-06-01), Sugiyama et al.
patent: 4504935 (1985-03-01), Jansen
patent: 4583212 (1986-04-01), Koide et al.
patent: 4698798 (1987-10-01), Faber et al.
patent: 4942562 (1990-07-01), Suzaki
patent: 5175723 (1992-12-01), Guha
patent: 5189660 (1993-02-01), Caldwell

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