Head actuator pivoting around stationary shaft and dish having such head actuator

Claim 1

A magnetic disk storage adapted to be interchangeably connected to a driving device which provides a means for coupling said magnetic disk storage to a computer, said magnetic disk storage comprising: a single fixed plate; a head actuator provided on said fixed plate and comprising a stationary shaft having first and second ends, a head supporting member pivotably supported around said stationary shaft, and a head attached to said head supporting member, said stationary shaft of said head actuator being positionally fixed in a longitudinal direction of said stationary shaft by said fixed plate which supports only the first end of said stationary shaft; a disk on which information is recorded and/or from which information is reproduced by said head; and a housing, accommodating said head actuator and said disk therein, which has a first surface and a second surface opposite to said first surface, said actuator being fixed on said first surface in said housing via said fixed plate, said fixed plate being a member different from said housing, one end of said stationary shaft extending substantially vertically on said first surface of said housing via said fixed plate so that a span of said stationary shaft is substantially equal to a distance between said first surface and said second surface, said stationary shaft being held between said first and second surfaces of said housing, said second end of said stationary shaft directly engaging but not secured to said second surface of said housing, said second end of said stationary shaft directly engaging said second surface of said housing without an intervening fixed plate.