Head carriage device

A disk recording/reproducing unit in which a head mounted on a head carriage is positionable to read or write data on a recording medium having a top surface and a bottom surface accommodated in a disk case adapted to be placed into said disk recording/reproducing unit at a recording/reproducing position thereof, said head carriage comprising:

• an arm on which a first magnetic head having a bottom surface is mounted, said arm being movably supported so that said bottom surface of said first magnetic head is postionable on said top surface of said recording medium;
• a carriage member having a mounting surface separated a fixed distance from said arm;
• and
• a second magnetic head mounted on the mounting surface of said carriage member, said second magnetic head having a top surface positionable on said bottom surface with said second magnetic head disposed opposite to said first magnetic head,
• wherein said arm is displaced a first distance from the bottom surface of said first magnetic head and said carriage member is displaced a second distance from the top surface of said second magnetic head with said first and second distance being unequal and with said recording medium positioned nonsymmetrically between said arm and said carriage member by a distance corresponding to difference between said first and second distances thereby reducing the thickness of the disk recording/reproducing unit for accommodating said head carriage.