| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lubricating structure of a rotation center capable of increasing the amount of grease applied to these slidably contacting surfaces and effectively reducing frictional resistance during operation without increasing a gap between the outer circumferential surface of a pivot and the inner circumferential surface of a boss. <P>SOLUTION: The inner circumferential edge of a through-hole 23 excluding a region A which can readily be worn mainly by being applied with a load from a pivot 22 which is rotatably fit into the through-hole 23 is cut out at least partly in a diameter-expanding direction, so that the cutout space serves as an oil reservoir 24 capable of storing lubricating oil. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
