BATTERY CHARGER OF CELLULAR PHONE

摘要

PURPOSE: A battery charger of a cellular phone is provided to increase the duration of use of a battery by charging the battery through the impact force. CONSTITUTION: A case(1) has space enough to include all sorts of components. A pair of piezoelectric devices(2) are installed on a side of the case(1) in a separated state to each other, when stroke is made by a slide ball(4), generate a voltage corresponding to the stroke force. A ball guide bar(3) is installed so as to connect mutually a side terminal of the piezoelectric devices(2). The slide ball(4) is installed on the ball guide bar(3) so as to be capable of moving sliding to the lateral and generates a predetermined voltage from the piezoelectric devices(2) by hitting the piezoelectric devices(2). An over charge preventing unit(5) prevents a battery(7) from being damaged when the battery(7) is charged by supplying the voltage generated from the piezoelectric devices(2) to the battery(7) installed within a battery pack of a cellular phone.