ROTARY COMPRESSOR

To provide a rotary compressor for increasing the eccentricity amount of an eccentric part without causing the degradation of reliability.SOLUTION: In the rotary compressor, a lower side connection part (90) is provided between a lower side eccentric part (76) and a sub shaft part (74) of a driving shaft (70). The lower side connection part (90) is constructed so that a distance obtained by reducing an eccentricity amount eof the lower side eccentric part (76) from a radius Rthereof is smaller than a radius Rof the sub shaft part (74), and, with the outer face thereof not spreading out of the outer face of the lower side eccentric part (76), a height Hthereof is smaller than a height Hof a lower side piston (45). At the end of the inner peripheral face of the lower side piston (45) at the side of the lower side connection part (90), an inner peripheral groove (48) is formed extending in the peripheral direction to avoid the abutment of the inner peripheral face of the lower side piston (45) on the sub shaft part (74) when the lower side piston (45) is on the outer peripheral side of the lower side connection part (90) and the inner peripheral face is outside of the outer peripheral face of the lower side eccentric part (76).SELECTED DRAWING: Figure 2 【課題】ロータリ圧縮機において、信頼性の低下を招くことなく偏心部の偏心量を増大させる。【解決手段】ロータリ圧縮機において、駆動軸（70）の下側偏心部（76）と副軸部（74）との間に下側連結部（90）を設け、その半径ＲｅＬから下側偏心部（76）の偏心量ｅＬを減じた距離が副軸部（74）の半径ＲＳ未満になり、外面が下側偏心部（76）の外面からはみ出さず、高さＨＣＬが下側ピストン（45）の高さＨＰＬよりも低くなるように下側連結部（90）を構成する。下側ピストン（45）の内周面の下側連結部（90）側の端部には、下側ピストン（45）が下側連結部（90）の外周側で内周面が下側偏心部（76）の外周面より外側にあるときに、下側ピストン（45）の内周面と副軸部（74）との当接を回避するための周方向に延びる内周溝（48）を形成する。【選択図】図２