Hard disk drive device

Abstract

The object of the present invention is to provide a hard disk drive device having a bearing means of larger size and sufficient strength, improved impact resistance, high accuracy of rotation, and high reliability. In accordance with the present invention, a hard disk drive device comprising a motor including; a rotor or hub having around outer periphery thereof a downwardly depending flange, said hub is journalled rotatablly on a base by means of a bearing means, said hub is provided with a magnet on the inner peripheral surface of the downwardly depending flange; and, a stator provided on the base so as to opposed face to face with said magnet, said stator includes coils: and, a magnetic disk or disks having a central aperture to be fitted around the outer peripheral surface of the flange provided around the hub of the motor, said magnetic disk is adapted to be rotated by means of said motor: wherein the inner diameter of the downwardly depending flange of said hub of the motor is enlarged, so that the outer and inner diameters of the magnet confined within the downwardly depending flange, and the outer and inner diameters of the stator are also enlarged to allow the outer diameter of the bearing means to be enlarged.

What is claimed is:  
     
         1 . A hard disk drive device comprising 
 a motor including; 
 a rotor or hub having around outer periphery thereof a downwardly depending flange, said hub is journalled rotatablly on a base by means of a bearing means, said hub is provided with a magnet on the inner peripheral surface of the downwardly depending flange; and,  
 a stator provided on the base so as to opposed face to face with said magnet, said stator includes coils: and,  
 a magnetic disk or disks having a central aperture to be fitted around the outer peripheral surface of the flange provided around the hub of the motor, said magnetic disk is adapted to be rotated by means of said motor:  
 wherein the inner diameter of the downwardly depending flange of said hub of the motor is enlarged, so that the outer and inner diameters of the magnet confined within the downwardly depending flange, and the outer and inner diameters of tho stator are also enlarged to allow the outer diameter of the bearing means to be enlarged.  
   
     
     
         2 . The hard disk drive device according to    claim 1   , wherein the downwardly depending flange is also enlarged in its outer diameter.