Scroll compressor

A scroll compressor, comprising:

• a casing having a sealed inner space;
• a drive motor provided in the inner space of the casing to generate a rotational force;
• a rotational shaft rotatably coupled to the drive motor;
• an orbiting scroll formed of an aluminum material, and coupled to the rotational shaft to perform an orbiting movement;
• a fixed scroll coupled to the orbiting scroll to form a compression space;
• and
• an Oldham ring coupled to the orbiting scroll, and formed of a sintered metal, wherein the Oldham ring includes:
• a ring;
• and
• a plurality of keys formed of a same material and as a single body with the ring, the plurality of keys formed in a protruding manner on at least one of axial-direction lateral surfaces of the ring to allow the Oldham ring to be slidably coupled in a radial direction to key grooves of the orbiting scroll, wherein the ring includes:
• a plurality of thrust surfaces formed on an opposite surface to a surface having the plurality of keys, and the plurality of thrust surfaces continuously formed at both side surfaces of the plurality of keys in a circumferential direction and protruding by a predetermined height, wherein the plurality of thrust surfaces is supported by a member corresponding to the Oldham ring;
• a plurality of stepped surfaces that extends in a stepped manner from both side surfaces of the respective plurality of thrust surfaces in the circumferential direction;
• and
• a weight reducing portion that extends between the plurality of stepped surfaces as to connect the plurality of stepped surfaces to each other, wherein a circumferential length of the weight reducing portion is longer than a circumferential length of the plurality of thrust surfaces, and an axial height of the weight reducing portions is lower than an axial length of the plurality of thrust surfaces.