| 摘要 |
<p>PURPOSE: To prevent dew condensation due to the admission of highly humid air at the outside into a lighting chamber by installing a sheetlike heating element for defogging in a spot liable to cloud up out of the inner surface of lens. CONSTITUTION: A sheetlike heating unit 6 consists of a sheetlike heating element 60 made up of print-forming with conductive resin and a semiconductor or the like, a sheetlike electrode 61 being composed of print-forming with electrolytic copper foil and electric conduction or the like and stacked on one surface of the heating element 60, and a polyester film or the like, while both surfaces of the heating element 60 and the electrode 61 are equipped with some insulating films 62 stached each and a terminal part consisting of conductive materials including brass or the like, and they thinned, having flexibility, and further they consist of light permeability (opacity). The sheetlike heating unit 6 is installed in a spot being liable to cloud up out of the inner surface of a lens 2 of a lighting fixture, to be concrete, on an inner surface of a lower surface part 21 (including a ramp 26) of the lens with a blind function, on a knurling tool 25.</p> |
