| 摘要 |
To devise an incandescent bulb for a motor vehicle with a new arrangement which can withstand vibration during driving of a motor vehicle to a sufficient degree, an envelope is provided with a unilateral sealed portion which is preferably made of a glass that has quartz as the main component; at least two feed lines extend as inner leads into the envelope; and at least one filament coil of which the main component is tungsten and which forms an emission part, has one end connected to one of the lines and the other end connected to the other of the feed lines, and the filament coil has a spring constant of at least 25 g/mm and a weight of at most 100 mg. Furthermore, advantageously, the inner leads are made of a material of which the main component is molybdenum, and the diameter of the inner leads is at least 0.48 mm. |
