Patent ID: 7102091

Claim:
A lever switch comprising: a base having a circular recess on a top surface thereof; a common fixed contact fixed to an interior of the circular recess; a pair of side fixed contacts fixed at symmetric positions inside the circular recess separated from each other; an operation lever consisting of a disk, a lever laterally protruding from the disk and a shaft protruding downward from the center of the disk, the shaft being rotatably supported to a boss which vertically protrudes from the center of the circular recess; a rotor fixed to the shaft of the operation lever and provided with a fan notch notched in a fan shape on the outer wall thereof at a predetermined angle; a common contact spring strip fixed to an underside of the rotor and having contact with the common fixed contact; a side contact spring strip fixed to an underside of the rotor and having contact with or separate from the side fixed contact; a double-structure casing fixed to the base and holding the rotor therein and consisting of an inner cylinder and an outer case, the inner cylinder surrounding the rotor and the outer case having a fan notch notched in a fan shape on the an outer wall thereof at the same angle as the fan notches of the rotor; a coil spring wound around a perimeter of the inner cylinder, hooked at and fixed to both the fan notch, one tip bent part thereof pressing to one notch end of the rotor fan notch and one notch end of the casing fan notch, the other tip bent part to the others, to bias the operation lever to a neutral position on the base; an upper lip packing provided on a top surface of the casing in a ring shape and pressed against an underside of the disk; and a lower lip packing provided on an underside of the outer case in a ring shape and pressed against a perimeter of the circular recess.