Patent ID: 6414908
Filing Date: 2002-07-02
Classification: G04C

Abstract:
An electronic clock, comprising:reference signal generating means for generating a reference signal; pulse control means for outputting a plurality of pulse signals whose strength is different based on said reference signal to a motor to drive the motor; a wheel train which is rotated by said motor; indicator means which is rotated by said wheel train; position detecting means for detecting predetermined position of said indicator means; and rotation judging means for outputting a rotation signal or a non-rotation signal by detecting whether or not said motor rotates; said electronic clock being characterized in that it is provided with high load means for applying high load to said wheel train at constant cycle to rotate said motor only when the high load is applied to said wheel train and a pulse signal of predetermined strength or more is outputted to said motor; said pulse control means outputs a normal driving pulse, outputting a first auxiliary driving pulse whose strength is greater than that of said normal driving pulse when said rotation judging means outputs a non-rotation signal after outputting said normal driving pulse or outputting a second auxiliary driving pulse whose strength is greater than said first auxiliary driving pulse and said predetermined strength when said rotation judging means outputs the non-rotation signal after outputting said first auxiliary driving pulse; and said position detecting means judges that said indicator means is located at said predetermined position when said second auxiliary driving pulse is outputted.