Recording and reproducing disc driving apparatus

Claim 1

A recording and reproducing disc driving apparatus having a given rectangular outer configuration when viewed from above, said apparatus comprising: (a) a sub-base having an outer configuration that forms said given rectangular configuration of the apparatus; (b) a main base fixedly mounted on said sub-base, above a top surface of said sub-base; (c) fastening means attaching said main base to said sub-base; (d) a head disposed for opposition to a data recording and reproducing disc; (e) a carriage mounted on said main base and supporting said head; (f) a first motor, mounted on said main base, for driving said carriage to move said head to desired positions with respect to a disc; (g) a sensor, mounted on said main base, for detecting when said head is in a desired position; and (h) a second motor for rotating the disc, wherein: (i) said main base has formed thereon a seat for receiving at least a portion of said second motor and a plurality of mounting openings for mounting said second motor and for mounting said main base on said sub-base; (j) a projection of said main base on said subbase is formed by a perimeter of said main base and fitted within said outer configuration of said subbase; (k) the area of said projection is smaller than the area formed by said top surface of said sub-base; (l) said main base has at least one cut portion formed therein such that said perimeter of said main base passes substantially adjacent to said carriage, said first motor, said sensor, said seat, and said mounting openings; (m) the area of said projection is substantially as small as possible for the mounting of said carriage, said first motor, and said sensor and for the provision of said seat and said mounting openings; (n) said main base comprises a plurality of engaging portions at its outer periphery which are engageable with a plurality of said fastening means for connecting said main base to said sub-base; (o) said at least one cut portion extends near said engaging portions; (p) said sub-base comprises a further plurality of engaging portions; and (q) said sub-base has slots formed therein near each of said engaging portions formed in said sub-base so that displacement in position of said engaging portions of said sub-base is allowed.