Patent ID: 6570108
Filing Date: 2003-05-27
Classification: G06F,H01H

Abstract:
A switch mechanism comprising:a ratchet having a plurality of sawteeth; two tappets rotatably installed at two opposite sides of the ratchet, each tappet having a pivot, a first end and a second end, the first end and the second end being rotatable along a clockwise direction and a counterclockwise direction with respect to the pivot; and two sensors each disposed beside the second end of a corresponding tappet for generating detecting signals when triggered by the second end of the tappet; wherein when the ratchet rotates clockwise, the sawteeth of the ratchet push the first ends of the two tappets to cause the tappets to rotate counterclockwise thereby driving the second end of one of the two tappets to trigger the corresponding sensor so as to generate detecting signals and driving the second end of another tappet further away from the corresponding sensor.