| 摘要 |
PROBLEM TO BE SOLVED: To provide a dustproof device for a light-emitting unit capable of facilitating the cleaning of a dustproof glass and further, preventing reduction in attachment position accuracy and sealability.SOLUTION: The dustproof device for a light-emitting unit includes a light-emitting unit 40 which emits light from the opening H1 of a housing 41, a stay 50 which has a window part H2 corresponding to the opening H1, a seal member 52 which is provided over the peripheral edge part 50b of the window part H2, and a dustproof glass 51 which is formed smaller than the seal member 52 and held between the housing 41 and the stay 50 through the seal member 52, to close the opening H1. The housing 41 includes an inner peripheral side pressing surface 41a which presses the peripheral edge part of the dustproof glass 51, to compress the inner peripheral side part a of the seal member 52 and an outer peripheral side pressing surface 41b which compresses the outer peripheral side part b projected from the dustproof glass 51 of the seal member 52 with a compression width larger than the inner peripheral side part a.SELECTED DRAWING: Figure 5 |
