Apparatus for reading and/or recording data on a rotating disc.

摘要

A magnetic head (4) is mounted on a carriage (5) which is movable radially with respect to a disc (3). The carriage is slidable on two balls (12) rolling in a groove in a guide (11) pivoted to the base (1) and pressed against the carriage by a spring (40). The carriage (5) is moved by a drive roller (20) which rolls against a track (22) on the carriage opposite to the guide (11). The roller is connected to the carriage by means of a flexible metal strip (24) which is fixed to the roller at the centre and to the carriage at its ends. The guide (11) which is pivoted on the base makes it impossible automatically to take up clearances between the carriage (5) and the guide (11). The carriage may be of very small dimensions and weight so that the reduced inertia of the carriage enhances the degree of precision of the movements of the head (40) from one track on the magnetic disc (3) to another.