| 摘要 |
PURPOSE: To decrease temperature at an introducing conductor sealing portion of a lamp and to prevent conductive foil from being disconnected by surrounding the introducing conductor sealing portion and providing a cylindrical shielding member inside the top portion of a reflector. CONSTITUTION: An opening edge of a cover of a reflector 1 is overlaid to an opening edge of the reflector 1 in a state where the cover is set to a thermal insulating plate 5. The reflector 1 and the cover thereof are locked by an internal edge of a louver frame, thereby holding the reflector 1 as well as the cover. A shielding member 7 is fixed to the top of the reflector 1 by welding the outer peripheral portion. In the case where there is no shielding member 7, an introducing conductor sealing portion 4 is exposed to reflecting heat and temperature is increased. However, since the shielding member 7 is provided opposite to the sealing portion 4, heat of a lamp 3 reflected to the reflector 1 is insulated by the shielding member 7, thereby enabling increase in temperature of the sealing portion 3 to be suppressed and improving the service life of the lamp. |
