| 摘要 |
PURPOSE: An infrared lamp is provided to reduce manufacturing cost and considerably improve a production yield without hanging down during heating by using the heating element. CONSTITUTION: The carbon-based heating element of the infrared lamp is reheated at 1800°C, thereby producing a wire-shaped carbon-based heating element(1) having a diameter of 1.55mm, made of a sintered body including a carbon-based substance and having a change rate of 6.8%. Internal lead wires(4a,4b) each formed of a molybdenum wire are attached to respective ends of the carbon-based heating element(1) at coil-shaped portions(3a,3b) formed at ends of the internal lead wires(4a,4b) so as to be screw-connected to the ends of the carbon-based heating element(1) with tight fit. The internal lead wires(4a,4b) have coil spring portions(5a,5b), respectively, each having at least one turn. The other ends of the internal lead wires(4a,4b) are connected to one ends of molybdenum foils(6a,6b) having a thickness of 20 micrometer, respectively. External lead wires(7a,7b) each formed of a molybdenum wire are welded to the other ends of the molybdenum foils(6a,6b), respectively.
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