| 摘要 |
PURPOSE:To realize both prevention of drop of a lighting cover by deflection, and prevention of deformation of the lighting cover by heat, etc. CONSTITUTION:Both end edges 3a of a lighting cover 3 are placed on a pair of ribs 14 respectively. A pair of protrusions 15 are protruded in an upper surface 14a of the ribs 14. The end edges 3a of the lighting cover 3 are faced with the protrusions 15 having a gap (b) between each other respectively. The gap (b) is set to be within a range in which each end edge 3a of the lighting cover 3 is not removed from the rib 14 even when the lighting cover 3 is deflected in the gap (b). Each end edge 3a of the lighting cover 3 is capable of removing from the rib 14 in the condition where one end edge 3a of the lighting cover 3 is set on the upper surface 15a side of one protrusion 15. |
