DYNAMIC PRESSURE BEARING DEVICE

PROBLEM TO BE SOLVED: To provide a dynamic pressure bearing device capable of achieving reduction of the cost. SOLUTION: This dynamic pressure bearing device supports a shaft member 2 along the radial direction by the dynamic pressure effect generated in a radial bearing gap between an outer peripheral surface of the shaft member 2 and an inner peripheral surface 7a of a bearing member 7 in a non-contact state, and is constituted by the shaft member 2, the bearing member 7, a lid member 8, and a seal member 9. The shaft member 2 is inserted into the inner periphery of the bearing member 7, and a lower end aperture thereof is sealed by the lid member 8. The seal member 9 is attached to an upper end aperture of the bearing member 7, and a seal space S is formed between the seal member 9 and the outer peripheral surface of the shaft member 2. A dynamic pressure groove G of radial bearing parts R1 and R2 are formed on the inner peripheral surface 7a of the bearing member 7 by die molding. COPYRIGHT: (C)2007,JPO&INPIT