| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a scattered light type smoke sensor having a smoke detection part constituted in a further thinned shape and capable of freely setting the scattering angle, and having no directivity in the inflow of smoke to a smoke detecting space. <P>SOLUTION: This sensor has a holder 5 in which a light emitting part 6 and a light receiving part 7 are buried in opening parts 9 and 10 without being protruded into the smoke detecting space. The holder 5 interrupts the direct light going from the light emitting part 6 to the light receiving part 7, and the light emitting part 6 and the light receiving part 7 are fixed so that the optical axis 14 from the light emitting part 6 to the smoke detecting space and the optical axis 15 of a scattered light scattered by the smoke particles in the smoke detecting space and turned to the light receiving part 7 are mutually crossed horizontally at a prescribed first angle α and vertically at a prescribed second angle δ. <P>COPYRIGHT: (C)2003,JPO |
