| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce an adverse effect over a pumping effect and the flow in a pumping direction caused by lack of processing accuracy by improving a bearing structure generating dynamic pressure in a fluid dynamic pressure bearing device. <P>SOLUTION: The invention relates to a fluid bearing structure that is disposed on at least either of two bearing surfaces of a bearing constituent member that are moveable with respect to each other along a direction of movement while belonging to this fluid dynamic pressure bearing device. The bearing structure comprises two groove-type sections forming a pair with each other, each section extending at an acute angle with respect to the direction of movement and generating a set pumping action on the bearing fluid included in the bearing when the bearing constituent members move with respect to each other. According to the invention, the first section is disposed at an angleαand the second section at an angleβwith respect to the direction of movement, the two angles are different from each other. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
