| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that maintenance in case a failure occurs is complicated though the means time between failures(MTBF) is certainly extended when a light source is changed from an electric bulb for home use to an LED lamp in a traffic signal lighting tool. SOLUTION: The problem is solved by making the LED traffic signal lighting tool easily maintainable by anyone by concentrating parts to cause failures due to a power source to a cover part 9, making them into modules and further dispensing with replacement of the cover part 9, any tool and expertise by constituting the LED traffic signal lighting tool 1 is which an outer lens 6 and an inner lens 5 are mounted on the side of a main body case 8 and a light source board 3 and a power supply 7 are mounted on the cover part 9 constituted to be freely attachable/detachable to/from an opening part 8b to be provided at the rear part of the main body case 8.
|
