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Patent Searching and Data


Title:
DYNAMIC PRESSURE BEARING DEVICE, ROTATION DEVICE AND DEFLECTION SCANNING DEVICE
Document Type and Number:
Japanese Patent JP2002106549
Kind Code:
A
Abstract:

To prevent an oil of a dynamic pressure bearing device from leakage.

The dynamic pressure bearing device has a bearing of polyhedral mirrors comprised of a sleeve 2 integrally with a circuit substrate 14 setting a stator 12 and shaft 1 fitted therein. When an opening width W of an opening 2a of the sleeve 2 is small, the oil 6 leaks out due to enclosure of air in a spacing of the bearing and when the opening width W is large, the oil 6 is feared to leak out on tilting the device. Then the oil is prevented from leakage by setting the opening width W not less than 0.15 mm, not greater than 0.20 mm.


Inventors:
Takizawa, Shoichi
Application Number:
JP2000000304323
Publication Date:
April 10, 2002
Filing Date:
October 04, 2000
Export Citation:
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Assignee:
CANON INC
CANON PRECISION INC
International Classes:
G02B26/12; F16C17/02; F16C17/08; F16C33/10; G02B26/10; H02K5/16; H02K7/08; (IPC1-7): F16C17/02; F16C33/10; G02B26/10; H02K5/16; H02K7/08
Domestic Patent References:
JPH08320015A1996-12-03
JPH06269142A1994-09-22
Attorney, Agent or Firm:
阪本 善朗