| 摘要 |
PROBLEM TO BE SOLVED: To achieve cost reduction of a dynamic pressure bearing device and to keep stable rotating performance. SOLUTION: This dynamic pressure bearing device 1 is composed of a rotating member M composed of a shaft portion 2a, a flange portion 2b and a disc hub 3, and a bearing member 7 mounted on an outer periphery of the shaft portion 2a. The rotating member M is rotatably supported in a non-contact state by dynamic pressure effect generated in radial bearing clearance and thrust bearing clearance formed between these members. Here, a radial bearing surface A having a dynamic pressure generating portion formed by supplying a resin composition, is formed on a material surface of the shaft portion 2a, one end-side end face of the bearing member 7 is faced to the first thrust bearing clearance, and has a thrust bearing surface B formed by die forming and having a dynamic pressure generating portion. COPYRIGHT: (C)2006,JPO&NCIPI
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