发明名称 |
Dynamic-pressure gas bearing structure and optical deflection scanning apparatus |
摘要 |
A dynamic-pressure gas bearing structure includes a columnar shaft made of a silicon-nitride-based ceramic sintered body, a hollow cylindrical sleeve opposed to the shaft as keeping a clearance in a radial direction, the sleeve being made of a silicon-nitride-based ceramic sintered body, and at least three flat face portions located on a peripheral surface of the shaft and at equal intervals to the circumference along the peripheral surface. The flat face portion includes a plurality of unit planes continuously formed at predetermined angles to a direction of the circumference on the peripheral surface of the shaft. The unit planes are formed so as to extend substantially in parallel with an axial direction of the shaft. <IMAGE> |
申请公布号 |
EP0732517(A1) |
申请公布日期 |
1996.09.18 |
申请号 |
EP19960103895 |
申请日期 |
1996.03.12 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LIMITED;CANON KABUSHIKI KAISHA |
发明人 |
MURABE, KAORU;KATAYAMA, TETSUYA;KOMURA, OSAMU;NAKASUGI, MIKIO;FUKITA, TAKU;SATO, ISSHIN |
分类号 |
F16C17/02;F16C33/04;F16C33/10;F16C33/24;F16C39/06;G02B26/12 |
主分类号 |
F16C17/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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