SOLDERING IRON APPARATUS

The present invention relates to a soldering iron apparatus which comprises: a front end unit for melting solder; a cylindrical or conical-shaped heater insertion unit which is formed along the front end unit from a rear end of the front end unit and is opened to the rear end side; an iron tip which is located in the heater insertion unit and includes a heater unit composed of a heater coil wound around a bobbin in the shape of a coil; and a temperature sensor for sensing the temperature of the front end unit. The temperature sensor is a thermocouple element line composed of a first element line of a positive (+) pole and a second element line of a negative (-) pole. The first element line and the second element line are extended in parallel at a gap therebetween so as not to be tangled with each other, and a thermocouple spot welding unit in which the first and second element lines are mutually spot-welded is formed in an extended front end portion. Therefore, the present invention can enhance the temperature detection response time; and precisely detect the temperature as the temperature of the iron tip is transmitted to the temperature sensor without a loss.