ROTATION REGULATING STRUCTURE OF PISTON IN COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide the rotation regulating structure of a piston in a compressor, in which the rotation width of the piston can be shortened. SOLUTION: A projected part 61 having a circular arc projected surface 61a is formed on the neck part 34 of a piston 32. A recessed part 62 is formed by the circumferential wall 11a of a front housing 11, and a circular arc recessed surface 62a is formed by the inner circumferential surface 11b of the circumferential wail 11a. The summit part 61b of the circular arc projected surface 61a is separated by a predetermined distance D1 from the circular arc recessed surface 62a. The radius R2 of the circular arc projected surface 61a is set larger than the radius R1 of the piston 32, and the center axial line L3 thereof is off-centered by a predetermined distance D2 on a side opposite to the projected part 61 against the axial line L4 of the piston 32. Then, the radius R2 of the circular arc projected surface 61a is set larger than the radius R3 of the circular arc recessed surface 62a.