| 摘要 |
PROBLEM TO BE SOLVED: To provide a sleeve type pivot structure hardly generating oil leakage even without strict control of the quantity of injected lubricant. SOLUTION: In the pivot structure 6 provided with a substantially conical pivot shaft 7 at the tip 71 and a sleeve 8 having a receiving face 81 coming into contact with the pivot tip 71 receiving a thrust force, a fine hole 82 is formed in the receiving face of the sleeve and the lubricant 9 is retained in the hole 82 by the surface tension and the apex of the pivot shaft point 71 is inserted in the hole, as the feature.
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