Switch module of built-in anti-surge disconnection structure

A switch module of built-in anti-surge disconnection structure, comprising:

• a housing with a press button at the top thereof, a first conductive plate arranged at the lower section thereof, a second conductive plate and a third conductive plate, where said first conductive plate is connected to a binary alloy conductive plate that has a spring leaf and a first connecting point in the middle section thereof, and said second conductive plate has a second connecting point on the surface of the upper section thereof corresponding to said first connecting point;
• a moving rod linking up the bottom of said press button with one end and a movable end of said binary alloy conductive plate with the other end, whereby the press button would press said binary alloy conductive plate and the spring leaf thereon to connect the first connecting point with the second connecting point, turning on the switch, and when current overload occurs, the binary alloy conductive plate would deform due to high temperature, detaching said first connecting point on the spring leaf from the second connecting point, thus turning off the switch, so as to form an overcurrent protection switch;
• wherein
• an anti-surge disconnection structure is built inside the housing under the spring leaf, including:
• at least one metal oxide varistor with a top surface and a bottom surface, and a set of conductive elements;
• a spring disposed on either surface of the metal oxide varistor;
• a band having a first end and a second end arranged correspondingly to compress the spring on the metal oxide varistor;
• at least one thermo-sensitive piece that is solid colloid to be adhered on the surface of the metal oxide varistor and to bond the first end and the second end for girdling and fixing the spring;
• a pushing rod having the upper end thereof under the bottom of the spring leaf;
• whereby when the first connecting point is contacting the second connecting point and an overvoltage occurs, the temperature of said metal oxide varistor would suddenly rise up to a pre-determined degree and the thermo-sensitive piece would melt, then the band would loosen, counterbalancing the compressing force on the spring and further displacing the pushing rod upwardly, therefore forcing the first connecting point detaching from the second connecting point and turning off the switch without having the binary alloy conductive plate deformed or being displaced.