| 摘要 |
A two-stage touch switch includes a circuit layer, a base, an elastic member, an insulating film, and a key base sequentially stacked from bottom to top. The key base includes an elastically raised key having a piece of electrically conductive rubber attached to a bottom surface thereof. The elastic member has an outward curved top, and the insulating film stacked on the elastic member has an outward curved area corresponding to the curved top of the elastic member. When the raised key is lightly pushed downward, a first stage of touch occurs; and when the raised key is further pushed, it forces and sinks the curved area of the insulating film and the curved top of the elastic member, and a second stage of touch occurs to complete the two-stage touch.
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