X/Y-SEPARATION CRANK MECHANISM AND DRIVE DEVICE PROVIDED THEREWITH

An XY separate crank mechanism provided between a movable body (12) reciprocating in a first direction and a rotatable crankshaft (14) to mutually convert reciprocating motion of the movable body and rotational motion of the crankshaft, includes a support member (20) provided freely reciprocatingly in the first direction, a crank connecting member (22) mounted on the support member freely reciprocatingly in a second direction perpendicular to the first direction and with which a crank of the crankshaft is rotatably engaged, and a connecting member (24) configured to connect the piston and the support member and reciprocate in the first direction together with the piston and the support member.