| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic pressure bearing device causing less abrasive powder and having a long service life while using a low cost resin bearing sleeve. SOLUTION: A large number of projected parts 1b reducing the contact area thereof with a shaft member are formed on the inner peripheral surface 1a of the resin bearing sleeve 1 excluding a dynamic pressure groove 1v part to facilitate the sliding thereof on the surface thereof. Accordingly, even if the shaft member is brought into contact with the bearing sleeve 1 when the device is started/stopped, abrasive powder can be prevented from being produced. Thus, since troubles resulting from the abrasive powder can be prevented, the service life of the device can be improved. COPYRIGHT: (C)2005,JPO&NCIPI
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