| 摘要 |
An actuating mechanism includes a motor, a tube, a transmission, a shank, a worm, a worm wheel, and a spring; the tube has a steel roll-up curtain connected thereto, and can be turned in one direction for winding the curtain around it, and in the other direction for unwinding the curtain; the transmission is joined to an output shaft of the motor and the tube; the shank is joined to a main body of the motor and the worm wheel; the worm has a toothed side for engaging the worm wheel, and it has a straight side facing in an opposite direction to that of the toothed side; the spring is fixed at one end, and securely joined to the transmission at other end; the roll-up curtain can be manually opened and closed without power supply to the motor after the worm is disengaged from the worm wheel. |
