Abstract: A power plug with overloaded display providing users with a function of a warning display for protecting the power plug from over-heated melting and from shorting and catching on fire. The plug includes an embedded positioned block arranged on a periphery of electric metal-pins of the power plug, and a thermochromic film is coated on the surface of the embedded positioned block, and warning characters are printed on the embedded positioned block. The external body of the power plug is made by injection modeling with mixed transparent PVC and thermochromic materials, or the embedded positioned block may be directly injected with thermochromic materials, or connected with a detecting transistor linked by a light emitting diode (LED). When the power plug is over-heated and the temperature of the power plug generally increases, the thermochromic materials or the LED will display a warning message.

Abstract: The present invention provides a electronic heater which uses a plurality of temperature sensing protector switches connected in series so that unusual temperature within said heater can be automatically detected if said heater is under abnormal use. The protector shut off the power of said heater in time to prevent overheating from happening and causing danger and to protect the safety of human beings or apparatuses.