Patent ID: 7971391

Claim:
A movable body driving apparatus comprising: a rotary actuator comprising: a cylindrical rotor having a closed end and an output shaft extending outwardly from an external surface of the closed end; a support shaft extending from an interior surface of the closed end into an interior of the rotor, the support shaft being coaxial with the output shaft; an encoder enclosed within the cylindrical rotor for detecting rotary actuator rotation, the encoder being mounted on the support shaft within the interior of the cylindrical rotor; a motor frame enclosing the cylindrical rotor and the encoder; and a stator core and a stator coil supported by the motor frame in a predetermined juxtaposition with respect a circumferential outer surface of the cylindrical rotor; first and second bearings rotationally supporting the output shaft, the first and second bearings being disposed outside the motor frame, one of the first and second bearings being supported on an exterior surface of the motor frame; a pinion gear attached onto the output shaft between the first and second bearings; a pair of linear transmission members opposed to each other and arranged to be in mesh with the pinion gear to move approximately parallel to each other in opposite directions, a door rail arranged under the pair of linear transmission members, a pair of sliders slidably disposed on the door rail and fixed to the linear transmission members to move according to movements of the linear transmission members, and a pair of horizontally opening doors each connected with one of the sliders so that the doors are simultaneously moved in opposite lateral directions upon rotation of the pinion gear.