| 摘要 |
PROBLEM TO BE SOLVED: To provide a smoke sensor having a structure where foreign matters such as dust or the like are less likely to enter a sensor part.SOLUTION: A smoke sensor installed and used on a wall surface includes: a case part having a base part 1a capable of being installed on the wall surface, and a cover part 1c attached to the base part 1a, for permitting inflow of smoke at least from a side peripheral surface; and a sensor part 3 stored in the case part and capable of sensing smoke having flowed in. In at least one of the cover part 1c and the base part 1a, there is provided a smoke guide part 12 for guiding the smoke having flowed inside the case part, to the sensor part 3. At least a part of the smoke guide part 12 is disposed at a position over the sensor part 3 when the case part is installed on the wall surface. The smoke guide part 12 has an accumulation part for accumulating dust falling from above, and the smoke guide part 12 has a horizontal part 12a horizontally formed along a side peripheral surface of the sensor part 3. |
