Patent ID: 6758012
Filing Date: 2004-07-06
Classification: E05B

Abstract:
An actuator for operating a vehicle door comprising:a housing; an electric motor accommodated in the housing and having an output shaft; a worm gear engaged with the output shaft of the electric motor; a wheel gear rotatably supported in the housing and engaged with the worm gear, the wheel gear having a shaft portion; a first output member rotatably supported in the housing coaxially with the wheel gear and having a shaft portion; a spring case supported by the housing; and a spring accommodated in the spring case, the spring being disposed around the shaft portion of the wheel gear and the shaft portion of the first output member for frictionally engaging an outer peripheral surface of the shaft portion of the wheel gear and an outer peripheral surface of the shaft portion of the first output member, with the frictional engagement operationally connecting the wheel gear to the first output member so that rotation of the wheel gear is transmitted to the first output member by way of the spring, one end of the spring being maintained by the wheel gear and another end of the spring being maintained by the spring case.