| 摘要 |
PURPOSE:To decrease the number of components by mounting an indicating/ operating unit on the surface of front door hinged to the body containing a power supply board and electronic components and fixed with a back plate for forming a wiring chamber while opposing thermally susceptible electronic components to the power supply board and providing vents at the board containing part. CONSTITUTION:A front door 4 is hinged to the body of a fire alarm receiver 1 through a cut part 15 and a hinge mechanism 16. An indicating/operating unit 20 is mounted on the surface of the front door 4 whereas a control board 26, an LCD board 26, and the like are mounted on the inner face thereof. A wiring duct 74, a power supply board 75, and a power supply transformer 76 are mounted on the back plate 6 of the body 3. Thermal susceptible electronic components are opposed to the power supply board 75 and vents are provided at the part for containing the board 75. This structure decreases the number of components. |
