Patent ID: 7323650

Claim:
A switch device comprising: a case having an open top and a switch member pivotably engaged with the open top of the case, a box connected to an inside of the case and a spring received in the box; a first terminal and a second terminal respectively extending through a bottom of the case, a bimetallic plate having a first end fixed to the first terminal and a first contact point connected to a second end of the bimetallic plate, a second contact point connected to the second terminal and located beneath the first contact point, and a protection mechanism including a first member which has a hook portion at a lower end thereof and an upper end of the first member pivotably connected to the switch member, a second end of the bimetallic plate located above the hook portion, a second member having a top end thereof pivotably connected to a connection member which is biased by the spring in the box toward the switch member and pressed by the switch member, a lower end of the second member being pushed at angle by the second end of the bimetallic plate when overload.