Patent ID: 7217893
Filing Date: 2007-05-15
Classification: H01H

Abstract:
1. A two-stage button structure, comprising: a silver paste PCB having a first conductive area, a second conductive area and a third conductive area that are separated from each other and are sequentially formed thereon from outside to inside; a metal dome electrically disposed on the second conductive area, and insulated from the third conductive area; a film disposed on the silver paste PCB and covered on the metal dome, wherein the film has a pair of through holes for respectively exposing one part of the first conductive area and one part of the second conductive area; a flexible contact body having an opening, and a pair of conductive blocks projected downwardly therefrom and corresponding to the pair of through holes; and a button body having a pressing portion and a contact pin extending downwardly from the pressing portion, wherein the button body is disposed on the flexible contact body and the contact pin passes through the opening; whereby, when the button body is pressed to a first stage, the pair of conductive blocks of the flexible contact body respectively pass through the pair of through holes of the film to respectively electrically contact the first and the second conductive areas for generating a first stage signal; when the button body is pressed to a second stage, the metal dome is pressed via the contact pin to touch the third conductive area and the pair of conductive blocks respectively electrically contact the first and the second conductive areas at the same time so that the second and the third conductive areas electrically connect with each other to generate a second stage signal.