| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid force feed device, smooth in operation, by preventing foreign matter from biting in a clearance between a rocking shaft and a sliding bearing. SOLUTION: A snap mechanism 5 has the rocking shaft 37 supported in a sealed vessel 2, a float arm 51 and a sub-arm 52 rotating around the rocking shaft 37, a first shaft 58 supported by the float arm 51, a second shaft 59 supported by the sub-arm 52, a coil spring 54 installed between the first and second shafts 58 and 59, and the sliding bearing 62 arranged between the rocking shaft 37 and a support member 61 of the float arm 51. The sliding bearing 62 is formed as a curved surface of making an inner surface shape of sliding with the rocking shaft 37 coincide with an outside surface shape of the rocking shaft 37, and is partially arranged only in a part of bringing the rocking shaft 37 into pressure contact with the support member 61 of the float arm 51. COPYRIGHT: (C)2008,JPO&INPIT
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