| 摘要 |
PROBLEM TO BE SOLVED: To easily prevent deterioration of a sensor sensitivity at the time of shade installation without degrading design property by installing an infrared ray-transmissive opening and closing member in an open hole of a reflecting plate on the opposite to an infrared sensor installed in the luminaire main body. SOLUTION: A mountain-shape reflecting plate 30i installed in a box type luminaire main body having an open part in a lower part and a linear tubular fluorescent lamp 11 is install in the installation space 32 through a lamp socket 10. Further, an infrared sensor 40 is installed on the opposite to an aperture hole 3t formed 10 the center reflecting plate 35 having a reversely triangular shape to detect the existence of a human being to turn on and oft and modulate the light. in such a luminaire, an opening and closing member 45 which slides back and forth us installed in the longitudinal direction of the back side of a center reflecting plate 35. The opening and closing member 45 is made of an infrared ray transmissive material and the member 45 is moved and opens the aperture hole 37 in the case a shade 20 is installed in the open part and closes the aperture hole in the case no shade is installed. |
