Patent ID: 6998554

Claim:
A push-button switch unit comprising: a main body having a base; a push switch which fixed to the base, said push switch having a switch operating part; and a push button operatively engaged with the operating part such that pressing the push button operates the operating part so as to turn the push switch on and off, and wherein one of the push button and main body includes a pair of shaft rods each having a solid keyhole shape in cross-section, and wherein the other of the push button and main body includes a pair of key hole sockets for slideably receiving a corresponding one of the shaft rods, wherein each of said shaft rods has a cylindrically columnar segment and a prismatic segment extending outwardly from said columnar segment, and wherein each of said shaft sockets have a circular hole segment and a rectangular segment so as to establish a cross-sectional shape which corresponds to the cross-sectional shape of the shaft rods and thereby slideably receive respective ones of the shaft rods therewithin.