| 摘要 |
There is provided an LED display device which can improve maintenance properties accompanied by tightening and loosening of screws, and which can prevent deterioration in waterproof effect due to an over-tightening of screws in screw-fixing process. This LED display device includes a base plate having LED devices arrayed on its front surface, holes for screws bored through from front surface to rear surface, and a projecting portion formed around the holes within the rear surface so as to surround the holes, and a rubber packing placed between the projecting portion and the holes and having a thickness in its non-compressed state larger than a size of projection of the projecting portion. The screw is inserted into the hole from the front surface of the base plate, and into the hole of the chassis, whereby the base plate is fixed to the chassis. By the presence of the projecting portion, the screw packing and the rubber packing are prevented from over-compression. |
