| 摘要 |
PURPOSE: A cover combination structure and an auxiliary combination device for a light duct are provided to maintain stable coupling between the duct body and the cover by widely forming a coupling area between a duct body and a cover. CONSTITUTION: A first support(21) contacted with an end of both sidewalls of a cover is formed on the end of both sides of a duct body(20). A first coupling unit(24) includes a first semicircular groove(22) and a first protrusion(23). The first circular semicircular groove has an engraved structure from the first support to the internal direction. A first protrusion is protruded to the external direction. A second coupling unit(44) includes a second support(41), a second semicircular groove(42), and a second protrusion(43). The second support contacted with the end of both sidewalls of the duct body is formed on the end of both sidewalls of the cover. The second semicircular groove has the engraved structure from the second support to the external direction. A second protrusion is protruded to the internal direction. The first coupling unit and the second coupling unit have a wide coupling surface. |
