JPH01133693U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案による散乱光式煙感知器の一実
施例における中央縦断面図、第２図は第１図の散
乱光式煙感知器の分解組立図、第３図は従来の散
乱光式煙感知器における中央縦断面図、第４図は
第３図の散乱光式煙感知器の外観図であつて、各
図を通じて同一部分は同一符号で示してある。 １０…暗箱、１１…煙流入口、４…金網、３…
電気回路部、７…鍔部（金網をシールドケースか
ら隔てる部材）、９…本体ケース、１３…開口部
、１１，１２…小孔、突起（係合手段）、１４…
蓋体。 Fig. 1 is a central vertical sectional view of one embodiment of the scattered light smoke detector according to the present invention, Fig. 2 is an exploded assembly view of the scattered light smoke detector of Fig. 1, and Fig. 3 is a conventional scattered light smoke detector. FIG. 4 is an external view of the scattered light type smoke detector shown in FIG. 3, and the same parts are designated by the same reference numerals throughout the figures. 10... Dark box, 11... Smoke inlet, 4... Wire mesh, 3...
Electric circuit section, 7... Flange (member separating the wire mesh from the shield case), 9... Main body case, 13... Opening, 11, 12... Small hole, protrusion (engaging means), 14...
Lid body.

Claims (1)

【実用新案登録請求の範囲】 (1) 少なくとも、外来光を遮断して煙を流入さ
せる暗箱と、該暗箱の煙流入口を覆う金網と、上
記暗箱を載置し、電気回路部に進入する外来の電
気的ノイズを遮断するシールドケースとを有した
散乱光式煙感知器において、上記暗箱は絶縁物よ
りなり、上記金網とシールドケースとの間に介在
して上記金網をシールドケースから隔てる部材を
上記暗箱に一体に形成したことを特徴とする散乱
光式煙感知器。 (2) 少なくとも、外来光を遮断し煙を流入させ
る暗箱と、該暗箱の煙流入口を覆う金網と、上記
暗箱内へ光を送受する光学素子および該光学素子
に接続された電気回路部を内部に収容する本体ケ
ースとを有した散乱光式煙感知器において、煙流
入用の開口部を有し、かつ上記本体ケースとの係
合手段を有する蓋体により、上記暗箱および金網
を覆つたことを特徴とする散乱光式煙感知器。[Scope of Claim for Utility Model Registration] (1) At least a dark box that blocks external light and allows smoke to flow in, a wire mesh that covers the smoke inlet of the dark box, and the dark box that is placed thereon and enters the electrical circuit section. In a scattered light smoke detector having a shield case for blocking external electrical noise, the dark box is made of an insulating material, and is a member interposed between the wire mesh and the shield case to separate the wire mesh from the shield case. A scattered light type smoke detector characterized in that the above-mentioned dark box is formed integrally with the above-mentioned dark box. (2) At least a dark box that blocks external light and allows smoke to flow in, a wire mesh that covers the smoke inlet of the dark box, an optical element that transmits and receives light into the dark box, and an electric circuit connected to the optical element. In a scattered light smoke detector having a main body case housed inside, the dark box and the wire mesh are covered by a lid body having an opening for smoke inflow and having means for engaging with the main body case. A scattered light type smoke detector characterized by: