Patent ID: 6834996
Filing Date: 2004-12-28
Classification: F16C,G11B

Abstract:
A dynamic pressure bearing motor comprising:a rotary shaft; a rotary hub coupled to the rotary shaft; a dynamic pressure bearing sleeve for supporting the rotary shaft by dynamic pressure, the dynamic pressure bearing sleeve having a fallout stopper flange section that protrudes outward in the radial direction; a thrust dynamic pressure bearing section formed in an axial direction between the dynamic pressure bearing sleeve and the rotary hub; and a circular ring-shaped member that surrounds an outer circumference surface of the dynamic pressure bearing sleeve, the circular ring-shaped member having a hub mounting section that connects to an end surface of the rotary hub in a region radially outside the thrust dynamic pressure bearing section, and a main body section that protrudes inward from the hub mounting section; wherein an inner circumference surface of the hub mounting section of the circular ring-shaped member opposes in the radial direction an outer circumference surface of the fallout stopper flange section of the dynamic pressure bearing sleeve, and the main body section of the circular ring-shaped member opposes in the axial direction the fallout stopper flange section of the dynamic pressure bearing sleeve to prevent the dynamic pressure bearing sleeve from falling out in the axial direction.