Mounting structure for information recording and reproducing apparatus

Claim 1

A structure for an information recording and reproducing apparatus adapted for increased storage capacity and an increased operating speed by placing a relatively larger number of relatively smaller magnetic disks each having a relatively smaller mass and a relatively smaller recording and reproducing surface in a box-like frame for a relatively larger magnetic disc, comprising: a plurality of coaxially arranged 5.25 inch magnetic disks; a corresponding number of magnetic heads, one magnetic head for recording and reproducing information on each of said magnetic disks; means for positioning said magnetic heads at positions with respect to said magnetic disks for recording and reproduction of information on said magnetic disks; means for rotating said magnetic disks; a circuit assembly for controlling the operation of recording and reproducing information to and from said magnetic disks; an enclosure for housing said magnetic heads, said magnetic disks, said positioning means, and said rotating means; and a box-like frame for holding and mounting said enclosure, said frame having opposing inner end faces of a width about 8 inches, sized for capable of accommodating 8-inch disks and opposing inner side faces joined with said end faces, said side surfaces having a length greater than the length of said end faces, wherein said circuit assembly is disposed outside said enclosure and disposed between one of said end faces of said frame and said enclosure, said end faces and said side faces of said frame being generally perpendicular to a plane of said disks, and wherein said positioning means is capable of positioning each said magnetic head within an average time of about 12 millisecond, and said rotating means is capable of rotating said magnetic disks at about 5,000 rpm.