| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of an insect net which is easily assembled at a low cost. SOLUTION: In a smoke detection part 14 that forms a smoke detection space, a light emitting part holder 32 having a light emitting element and a light receiving part holder 30 having a light receiving element are arranged. The light receiving element receives the light scattered by the smoke that has entered the smoke detection space and sent from the light emitting element and detects a fire. In such a constitution of a smoke sensor, the part 14 is entirely covered with an insect net 12 consisting of flexible materials such as the fibers having a mesh structure. |
