| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic pressure bearing device having a bearing member having a through-hole, and superior in moldability. SOLUTION: Since the through-hole is molded by a molding pin 13 arranged in a cavity 16, the through-hole can be easily molded more than when molded by machining, and there is no risk of mixing-in of contamination. Risk of breaking an extra fine molding pin 13 can be reduced by arranging the molding pin 13 in a wide part A1' of relatively low pressure by an injected resin among the cavity 16. COPYRIGHT: (C)2008,JPO&INPIT
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