| 摘要 |
PROBLEM TO BE SOLVED: To provide a baloon type lighting device in which radiation fins can be efficiently cooled through a simple configuration.SOLUTION: A light source part 2 is provided with a plurality of upper stage light-emitting plates 10 having a plurality of LED elements arranged at its front surface and the rear surface sides of these upper stage light-emitting plates 10 are provided with heat radiation fins 14 for radiating heat of LED elements. One end side of each of the plurality of upper stage light-emitting plates 10 is supported by an intermediate plate 11c so as to make a partition against a space of an air blowing part 4. A top plate 11f is arranged at the other end side of each of the plurality of upper stage light-emitting plates 10 so as to make a partition at an opposite side of the air blowing part 4. The intermediate plate 11c and the top plate 11f are provided with a plurality of guide windows 31 and 32 for guiding air from the air blowing part to the heat radiation fins 14. Each lower shutting-off part 33 and upper shutting-off part 34 for shutting off air from the air blowing part 4 is arranged between these guide windows 31 and 32.SELECTED DRAWING: Figure 1 |
