Patent ID: 7609589

Claim:
A perpetual calendar clock comprising: an outer case, having a month window, a date window, a day-of-the-week window, and a clock window formed on one side surface thereof; a rotatory wheel set, having a month wheel, a date wheel, and a day-of-the-week wheel, the wheels, respectively, having a month tab, a date tab, and a day-of-the-week tab disposed annularly thereon, the wheels, respectively, being aligned to the month window, the date window and the day-of-the-week window of the outer case, the wheels, respectively, having annular flexible circuit boards disposed therein, the wheels, respectively, having more than one bus disposed annularly on the inner surface thereof, the wheels, respectively, have inner ratchet wheels disposed at one edge thereof, the wheels, respectively, have more than one bump disposed on the inner surface of the edge other than that where the inner ratchet wheels are disposed, and thus the month wheel, the date wheel and the day-of-the-week wheel, respectively, being aligned to the month window, the date window and the day-of-the-week window of the outer case and a clock control unit being aligned to the clock window of the outer case; three driving apparatuses, being respectively placed within the month wheel, the date wheel and the day-of-the-week wheel of the rotatory wheel set and being fixed within the outer case, the driving apparatuses, respectively, driving the month wheel, the date wheel and the day-of-the-week wheel to rotate, the driving apparatuses each comprising a motor, a gear set, a deflecting rod, a touch switch, and a micro switch, wherein the front end of the deflecting rod is placed on the inner ratchet wheel, a touch terminal of the touch switch touches the buses on the flexible circuit board, and the micro switch is disposed so as to correspond to the bumps; and the clock-control unit, being is fixed at the clock window of the outer case, the clock-control unit consisting of an hour hand, a rotatory touch piece, and a control substrate, wherein through the rotation of the hour hand, the rotatory touch piece is driven so as to touch a contact surface of the control substrate, and upon one cycle of rotation of the hour hand per twelve hours, a signal is triggered for controlling and actuating the driving apparatuses.