Electronic wristwatch with electronic sound emitter device

Claim 1

An electronic wristwatch with an elctronic sound emitter device comprising an oscillator means for providing a frequency standard, said means providing a repetitive signal, a multi-stage frequency divider for reducing the frequency of the signal from the oscillator means, a time count means for determining the time, said means driven by a signal from the multi-stage frequency divider, a time display means to display the time content of said time count means, a control means to be controlled externally for controlling the setting of a sound emitting time in a memory means, a switch mechanism which is coupled to said control means to operate said control means, a memory means for storing the sound emitting time when said switch mechanism is activated, a detecting means for detecting the time matching between the setting of said memory means and the content of said time count means and thereupon providing a signal, a logic circuit means for providing a signal determined by said multi-stage frequency divider and said detecting means, said logic circuit means coupled to said detecting means and said multi-stage frequency divider, a sound emitter driving circuit coupled to said logic circuit means, a booster coil, a piezo-electric sound converter element, said piezo-electric sound converter element and said booster coils are connected in parallel, one end of said booster coil is coupled to the output end of said sound emitter driving circuit, the other end of said booster coil is coupled to a power terminal, whereby upon the correspondence of said time content with said memory content, said detecting means provides a signal to operate said logic circuit means to provide a signal from said multi-stage frequency divider to the input of said sound emitter driving circuit thereby oscillating said piezo-electric sound converter element.