Patent ID: 8467940

Claim:
An apparatus for a power seat comprising: a motor; a transmitting member mechanically connected to a seat and driven by the motor, thereby changing a state of the seat; an operational switch outputting an operational signal indicating a changing direction of the state of the seat; a sensor outputting a single pulse according to a rotation of the motor; a controlling portion driving the motor in a rotational direction corresponding to the operational signal so that the state of the seat is changed and counting the pulse outputted according to the rotation of the motor, thereby determining the state of the seat and memorizing the state of the seat; a judging portion judging the changing direction of the state of the seat after a start of the driving of the motor on the basis of the pulse; a drive continuing portion continuing the driving of the motor until the changing direction of the state of the seat is judged by the judging portion; and a pulse outputted after stopping of the driving of the motor is counted in an opposite direction to the direction corresponding to the changing direction of the state of the seat when a state where the pulse is not outputted continues for more than a predetermined time and the motor is determined to be in the mechanically-locked state after the judging portion judges that the changing direction of the state of the seat corresponds to the changing direction of the state of the seat indicated by the operational signal.