Driving device of electronic watch

Claim 1

A driving device for an electronic timepiece comprising a time standard oscillator; an alternative pulse generator for generating periodical alternative pulses under the control of said time standard oscillator; stepping motor means operatively coupled to said alterNative pulse generator; said stepping motor means including a stepping rotor having at its periphery a series of more than two pairs of alternate N and S magnetic poles and a stator having at least two pairs of poles, said stator being arranged coaxially with said rotor, said stepping motor means being adapted to produce alternative polarities on said stator poles to provide a rotating force in one direction on said rotor for the stepwise rotation of said rotor in one direction in response to the output of said alternative pulse generator; and time indicating gear train means, said gear train means including a second wheel, means for rotating said second wheel in response to the stepwise rotation of said stepping motor means rotor, and indexing means, said indexing means including a ratchet wheel secured to said second wheel and an indexing pawl in cooperative engagement with said ratchet wheel for controlling the stepwise rotation of said second wheel and stepping motor means rotor.