Patent ID: 7094982

Claim:
A switch device, comprising: a base member with an open end and a closed end wall, being cylindrical, providing an axial post extending from the closed end wall therein and the closed end wall having two opposite circular grooves near the circumference thereof; a rotary mechanism, being received in the base member for being operated to move a preset circular displacement and further comprising a first ratchet wheel, which is attached with a central stem, a second ratchet wheel, which meshes with the first ratchet wheel and has a bottom with a hole at the center thereof for fitting with the axial post and a plurality of semispherical projections being disposed next to the periphery thereof and spacing from each other, and a torsion spring, which is disposed on the bottom of the second ratchet wheel and surrounds the axial post with an end thereof engaging with the top of the axial post and another end thereof engaging with the second ratchet wheel; a vertical actuation mechanism, being composed of two elastic plates, which are received in the base member under the second ratchet wheel and movably disposed at the closed end wall corresponding to the two circular grooves with at least one contact point being provided at each of the elastic plates to protrude outward from two facial sides thereof; a hollow handle, providing a circular plate part, which has a diameter same as the inner diameter of the open end of the base member, and a cylindrical part being fixedly attached to the stem of the first ratchet wheel for being rotated by a user; a spring, being disposed between the first ratchet wheel and the circular plate part and surrounding the stem part for supplying a resilient force to the handle; and a cover plate, being disposed at the open end of the base member and providing a central bore for being passed through by the handle; whereby, once the handle is turned by the user to drive the first ratchet wheel rotating a preset circular distance with the second ratchet wheel such that the projections are capable of pushing the contact points downward to press button switches underneath.