Patent ID: 7641455

Claim:
A scroll compressor comprising: a motor accommodated in a container; and a compression mechanism which includes an orbiting scroll which has a scroll lap formed on a surface plate uprightly and which is driven by said motor, a fixed scroll which has a scroll lap formed on a surface plate uprightly and which is combined with said orbiting scroll, a main bearing member, and an Oldham ring which is provided between said orbiting scroll and said main bearing member and which orbits said orbiting scroll while preventing said orbiting scroll from rotating, in which said orbiting scroll and said main bearing member are made of aluminum-based material, said Oldham ring is made of iron-based material, mutually intersecting projecting keys are formed on both surfaces of said Oldham ring, and key grooves into which said keys are fitted for sliding motion are formed such that a back surface of a surface plate of said orbiting scroll and said main bearing member on the side of a thrust surface are mutually intersected, wherein when a width of said key of said Oldham ring is defined as t and a width of said key groove in said back surface of said surface plate of said orbiting scroll and a width of said key groove of said main bearing member on the side of the thrust surface are defined as s, a gap d generated at s−t is set in a range of (6×10 −5 )≦d/L≦(3.5×10 −4 ) with respect to a key pitch L of said Oldham ring.