Patent ID: 6326570
Filing Date: 2001-12-04
Classification: H01H

Abstract:
A switch comprising:a cylindrical case made of insulating resin having an upper open end;a pair of opposite spaced stationary contacts arranged on an inner wall of the case, each of said pair of stationary contacts having a contact part that extends vertically within the case in a position spaced away from the inner wall of the case, with a lower end thereof being bent outwards;an operation shaft that is supported within the case such as to be displaceable with respect to the case in an upward and a downward directions;a coil spring provided within the case for biasing the operation shaft upwards;a cover for closing the upper open end of the cylindrical case, said cover having a central through-hole through which the operation shaft passes;a bearing connected to the upper open end of the cylindrical case for uprightly supporting the operation shaft; anda contact piece inserted between a bottom end of the operation shaft and the coil spring, said contact piece comprising a middle part at which said contact piece is connected to the bottom end of the operation shaft, a pair of arms that extend obliquely downward from opposite edges of said middle part in an outwardly spreading manner, and a pair of movable contacts at leading ends of said pair of arms.