| 摘要 |
The present invention relates to a lighting device which can maintain illumination by preventing the penetration of foreign materials such as dust inside an LED lighting device, enable the manufacture of the lighting devices of various standards, improve the appearance of the lighting device, and facilitate the installation of the lighting device. To achieve the objective of the present invention, the lighting device comprises: two pairs of extruded frames (100) extruded in a uniform cross-sectional shape, having an upper plate insertion groove (111) formed in the upper part thereof, frame coupling bar insertion grooves A and B (131, 141) formed in the lower part thereof, and a coupling groove (151) formed on the bottom thereof, and having an inclined coupling surface (160) formed on the tip end thereof to be assembled in a rectangular shape; an L-shaped frame corner coupling bar (200) to fix the inclined coupling surfaces (160) of the extruded frames (100) to each other by respectively inserting the inclined coupling surfaces (160) of the extruded frames (100) in the frame coupling bar insertion grooves A and B (131, 141) on both sides after bringing the inclined coupling surfaces (160) of the extruded frames (100) into close contact with each other to make the inclined coupling surfaces (160) of the extruded frames (100) perpendicular to each other; an upper plate (300) inserted to the upper plate insertion groove (111) of the extruded frame (100) to seal an upper surface; a diffusion plate (400) made of a semitransparent material to seal the lower surface of the extruded frame (100); and a diffusion plate coupling member (500) to support the diffusion plate (400) by a diffusion plate insertion groove (530) formed when coupled to the coupling groove (151) of the extruded frame (100). |
