Patent ID: 7471017

Claim:
A paper-breaker touching safety protector, including the paper-breaking machinery part, functional circuit and conductive touch panel located at the paper-entry port of the paper-breaker, said functional circuit includes the power unit, motor driving circuit unit, control circuit unit and touch detecting circuit unit, said control circuit unit is connected with the paper-breaking machinery part via the motor driving circuit unit, and the control circuit unit is connected with the conductive touch panel via the touch detecting circuit unit, said power unit is connected respectively with the said control circuit unit and motor driving circuit unit, characterized in that said touch detecting circuit unit includes a bio-voltage control switch circuit and a ground switch circuit, the input control terminal of said bio-voltage control switch circuit is connected with said conductive touch panel, said ground switch circuit is a switch transistor circuit, said ground switch circuit includes a first switch triode, the base electrode of the first switch triode is connected with the output terminal of said bio-voltage control switch circuit, the emitter of the first switch triode is grounded, and its collector is connected with the power via a first resistor, and the collector is connected with the input control terminal of said control circuit unit via an optical coupler.