Patent ID: 7948351

Claim:
A circuit protection device having a warning function, comprising: a casing; a button connected to the casing and capable of moving up and down; a first terminal and a second terminal connected to the casing; a resilient bi-metallic plate capable of bending toward two opposite directions due to temperature change; and a warning light located within the button and having a first leg and a second leg, a resistor and a resilient member connected to the first leg, a connection member electrically connected to the second leg, the resilient member electrically connected with the first terminal, the resilient member capable of providing an upward elastic force to the button and the warning light; wherein when the button and the warning light are moved downward, the resilient member is compressed, the bi-metallic plate electrically connects the first terminal with the second terminal, a main circuit is connected with the first terminal, the bi-metallic plate and the second terminal, and the connection member of the warning light is separated from the second terminal to disconnect a circuit of the warning light; and wherein when the main circuit is overheated, the bi-metallic plate bends to separate from the second terminal, the main circuit is cut off, and the button and the warning light are pushed upward by the resilient member so that the connection member is in contact with the second terminal to form the circuit of the warning light via the first terminal, the resilient member, the resistor, the warning light, the connection member and the second terminal, and the warning light lights up.