| 摘要 |
PROBLEM TO BE SOLVED: To provide a smoke detector having an insecticidal net for effectively preventing entry of insects with a simple structure. SOLUTION: In the insecticidal net 10, vertical grooves 11 are formed on one surface and horizontal grooves 12 are on the other surface. The vertical grooves 11 cross the horizontal grooves 12 and further, the groove bottoms of the vertical grooves 11 communicate with the groove bottoms of the horizontal grooves 12, and hole parts 13 for circulating air are formed in a mesh shape. At least one of the vertical groove 11 and the horizontal grooves 12 has a shape to be larger in groove width from the groove bottoms toward opening parts. COPYRIGHT: (C)2011,JPO&INPIT |
