Push button switch

A pushbutton switch comprising a pushbutton body, a housing, a coil spring mounted on the lower portion of said pushbutton body provided slidably in said housing and a switch part provided on said housing downwardly of said coil spring, said switch part is actuated by said pushbutton body, characterized in that said pushbutton switch includes

• (a) said coil spring composed of a tension spring and a compression spring formed integrally with each other;
• (b) a spring seat casing provided at the center of said housing;
• (c) a projection part provided on the lower part of the pushbutton body;
• and
• (d) said tension spring being supported at one end thereof by said spring seat casing and at the opposite end thereof by said projection part, while said compression spring being engagable at one end thereof with said switch part and engaged at the other end thereof with said projection part, said spring seat casing having a through hole which is opened at the upper end thereof such that during asembly of said pushbutton switch, said coil spring and said projection part may be inserted into said casing through the opened end of said through-hole, said housing having an upper side, said housing further having means to engage said pushbutton body and prevent said projection part from being withdrawn from said spring seat casing once said projection part is inserted therein, the result being that said pushbutton switch may be completely assembled from the upper side of said housing.