Patent ID: 7399121

Claim:
A dynamic bearing device comprising: a housing; a bearing sleeve fixed on the inside of the housing, and an axial member which is inserted into the inner periphery of the bearing sleeve and rotates relatively to the bearing sleeve, the bearing sleeve supporting the axial member in a non-contact manner in a radial direction, by use of dynamic pressure action of a lubricating oil generated in a radial bearing gap between the inner peripheral surface of the bearing sleeve and the outer peripheral surface of the axial member when the axial member rotates, wherein the dynamic bearing device further comprises a bracket which is disposed on the outer periphery of the housing and has an attachment portion for a motor stator, the housing is made of resin and comprising a bottom portion integrally formed with a side portion, and the housing and the bracket are integrally molded, the axial member comprises a flange portion, the dynamic bearing device further comprises a thrust bearing gap formed between an end face of the flange portion and an inner bottom face of the bottom portion, and the axial member is supported in a non-contact manner in a thrust direction, by use of the dynamic pressure action of the lubricating oil generated in the thrust bearing gap.