| 摘要 |
PROBLEM TO BE SOLVED: To prevent light diffusion and mixture and also prevent an inner structure from being seen through, by using a material low in diffusivity for a light guide unit, with respect to a display unit of an alarm.SOLUTION: An alarm includes a cabinet 1, light-emitting elements 4a-c inside the cabinet, and a light guide unit 3 that guides light to a display unit. In order to avoid influence of adjacent light, a material high in transparency is used for the light guide unit 3, and shield members 5a-c that separate an optical path are provided. In order to conceal the inner structure, a material with a color low in lightness is used for the shield members 5a-c around the light guide unit 3. |
