Patent ID: 8643237

Claim:
An actuator comprising: a motor comprising: a stator assembly; a rotor rotatably disposed within the stator assembly, and including an output shaft, and a first gear attached on the output shaft; a first bearing arranged at a frame attached on one side of the stator assembly so as to rotatably support the output shaft; and a second bearing arranged at a rear plate attached on other side of the stator assembly so as to rotatably support the output shaft; a case which houses the motor, and which comprises a first engagement recess and a second engagement recess; a gear train disposed in the case, and constituted of a plurality of gears for transmitting rotational motion of the motor; a first elastic member fitted to the first bearing, and engaged with the first engagement recess of the case; and a second elastic member which is disposed between the case and the rear plate of the motor, is fitted to the second bearing, and engaged with the second engagement recess of the case, wherein the second elastic member is engaged with the rear plate of the motor by an engaging portion, and wherein the engaging portion is constituted by at least one boss provided to the second elastic member and at least one hole provided to the rear plate of the motor.