Seal structure in a scroll type compressor

A seal structure in a scroll type compressor, wherein:

• a fixed scroll, on the base of which a fixed scroll wall is formed, is opposed to a movable scroll, on the base of which a movable scroll wall is formed;
• a hermetic space, the volume of which decreases according to the orbital movement of the movable scroll, is formed between the movable scroll wall and the fixed scroll wall;
• and
• the movable scroll is designed so as to orbit when a rotational force of a drive shaft is transmitted to a orbital movement mechanism, which has an eccentric shaft in order to orbit the movable scroll;
• and wherein:
• the eccentric axis of an eccentric rotation body that eccentrically and integrally rotates with the eccentric shaft is allowed to move relative to the eccentric axis of the movable scroll;
• a seal member is interposed between the movable scroll and the eccentric rotation body so that the seal member circumscribes the eccentric axis of the eccentric shaft;
• and
• a back pressure chamber, which is opposed to the movable scroll, is formed by the movable scroll, the eccentric rotation body and the seal member.