| 摘要 |
PROBLEM TO BE SOLVED: To provide floating cam of an Oldham's coupling to have a high mechanical strength, reduce weight, lower a friction force, simplify a manufacturing process, and improve size precision. SOLUTION: This floating cam is provided with an approximate ring-form member 11 sliding over a revolving scroll 4 and a fixed member 6, and key parts 12A, 12B, 12C, and 12D situated at the approximate ring-form member 11 and slidably engaged with a slide grooves 9 formed in the revolving scroll 4 and the fixed member 6. The approximate ring-form member 11 is constituted in a manner to surround an approximate ring-form metallic material part 13 with a resin part 14. The key parts 12A, 12B, 12C, and 12D are formed of a resin part 14 and the metallic material part 13 is surrounded by the resin part 14.
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