A variable capacity rotary compressor including upper and lower
compression chambers having different capacities, and a rotating shaft.
Upper and lower eccentric cams are provided on the rotating shaft to be
eccentric from the rotating shaft in a same direction. Upper and lower
eccentric bushes are fitted over the upper and lower eccentric cams,
respectively, to be eccentric from the rotating shaft in opposite
directions, with a slot provided at a predetermined position between the
upper and lower eccentric bushes. A locking pin functions to change a
position of the upper or lower eccentric bush to a maximum eccentric
position. A restraining unit is set along an edge of the slot to prevent
the upper or lower eccentric bush from slipping. The restraining unit
includes first and second elastic pieces which are respectively provided
at positions adjacent to first and second ends of the slot.