Plug with overload protection and a safety switch

A plug with overload protection and a safety switch. It is comprised of an upper case, a bottom case, two conductive polar plates, two connective plates, two alloy plates, a safety switch and a return spring. The main features are as follows:

• There is a compartment in the center of the upper case with an arch-shape protection rim surrounding it, and the relative orientation holes in both sides of the said compartment, which allows the orientation bolt in both sides of the safety switch to be screwed and fixed. Among them, there is a protruding plate on the bottom front end of the safety switch. A return spring is put into the protruding post, which is located on the bottom rear end of the said safety switch. A conductive polar plate is located between the upper case and the bottom case, and an alloy plate is joined with the conductive polar plate by mortise and tenon joint. The other alloy plate, located on the rear end of the said alloy plate, is joined with the front end of the connective plate by mortise and tenon joint and becomes electric connected. The rear end of the connective plate is joined with another conductive polar plate by mortise and tenon joint while the rear end of the two connective plates is connected to the power cord (positive pole and negative pole).
• By adopting the structure mentioned above, when the circuit is short-circuited or overheated due to overload, the two alloy plates will be expanded and outstretched relatively to allow the return spring in the other end of the switch to push the insulating plate into the gap between the two alloy plates to cut the circuit between them with one of the features of the present invention, called the safety switch, which is equipped with automatic circuit breaker protection for the sake of safety.