Rotation drive device

A rotation drive device comprising:

• a fixed body portion having a stator formed in a ring shape and a plurality of stator core portions arranged in an inner peripheral portion of the stator at predetermined intervals along a circumferential direction and a stator coil wound around each of the plurality of stator core portions;
• and
• a movable body portion having a rotor magnet having a plurality of magnetic poles facing the fixed body portion and a rotor yoke attached to the rotor magnet,
• wherein the rotor yoke is formed in a ring shape and the plurality of magnetic poles are arranged along a circumferential direction of an outer peripheral portion of the rotor yoke;
• wherein each of the plurality of stator core portions faces an outer peripheral portion of the movable body portion;
• and
• a movable body support portion formed of a plurality of support rollers rotatably supporting the movable body portion, the movable body support portion being between the movable body portion and the fixed body portion in a radial direction,
• wherein the movable body portion includes a roller guide having a stopper portion for restricting relative displacement in an axial direction of the plurality of support rollers.