SMOKE DETECTOR

To provide a smoke detector that can be miniaturized.SOLUTION: A smoke detector 100 comprises: a housing that is mounted to a surface to be mounted and has a smoke detection space 33 formed inside to detect smoke; a light emitting unit 6A that irradiates light into the smoke detection space 33; a light receiving section 6B that receives light emitted from the light emitting unit 6A and scattered in the smoke detection space 33; and a board 6 that is provided inside the housing and on which the light emitting unit 6A and the light receiving unit 6B are mounted. The housing comprises a main body 3 in which a wall portion forming the smoke detection space 33 is formed. A concave notch portion is formed in the board 6. In the wall portion, the a board 6 is provided in a part of the periphery, and the wall portion is provided within the notch portion.SELECTED DRAWING: Figure 5 【課題】小型化が実現できる煙感知器を提供する。【解決手段】煙感知器１００は、被取付面に取り付けられ、煙を検出する検煙空間３３が内部に形成された筐体と、検煙空間３３に光を照射する発光部６Ａと、発光部６Ａから照射されて検煙空間３３にて散乱した光を受光する受光部６Ｂと、筐体の内部に設けられ、発光部６Ａ及び受光部６Ｂが実装される基板６と、を備える。筐体は、検煙空間３３を形成する壁部が形成される本体３を備え、基板６には、凹状の切欠部が形成され、壁部は、周囲の一部に基板６が設けられ、切欠部内に壁部が設けられる。【選択図】図５