MOTOR DEVICE

PROBLEM TO BE SOLVED: To provide a motor device capable of avoiding an unstable output from a sensor for detecting a rotational displacement of an output shaft by an external force or invasion of foreign matter, even with a very simple configuration.SOLUTION: A motor 20 that includes a rotating shaft 21 with a projecting end and transmits rotation to the outside, a sensor 30 that is mounted on the rotating shaft 21 of the motor 20 and that detects a rotational displacement of the rotating shaft 21 of the motor 20, and a gear unit 10 mounted on the rotating shaft 21 of the motor 20 are covered with a cover 2.