Patent ID: 7227734
Filing Date: 2007-06-05
Classification: H01H

Abstract:
1. An electrostatic protection device for a pushbutton module, comprising at least a printed circuit board (PCB), a keypad unit, and a keypad marking board, the keypad unit passes and protrudes from the keypad marking board, the electrostatic protection device comprising: an insulating sleeve, configured between the keypad unit and the PCB to enclose a portion of the keypad unit for isolating static electricity induced in the keypad unit; and an electrical conductivity board, configured between the PCB and the keypad marking board, wherein the electrical conductivity board comprises at least one opening through which another keypad portion passes, such that when static electricity is generated in the pushbutton module, the electrical conductivity board discharges the static electricity; wherein the opening of the electrical conductivity board comprises an inner margin, with a gap between the inner margin and the keypad unit.