Patent attributes
A safety device for a switch includes a first terminal, a second terminal and a conductive plate connected between the two terminals. A first contact point is connected to an end of the second terminal. The conductive plate has a first end fixed to the first terminal and a second contact point connected to a second end of the conductive plate and corresponding to the first contact point. A push rod is located at a side of the conductive plate and a gap is defined between the distal end of the push rod and the conductive plate. The push rod pushes a mediate portion of the conductive plate when the mediate portion of the conductive plate is overheating to bend toward the push rod under a current overload condition. The push rod applies a force to further separate the first and second contact points so as to ensure the circuit is cut off.
