JPH0344794U - - Google Patents
Info
- Publication number
- JPH0344794U JPH0344794U JP10622489U JP10622489U JPH0344794U JP H0344794 U JPH0344794 U JP H0344794U JP 10622489 U JP10622489 U JP 10622489U JP 10622489 U JP10622489 U JP 10622489U JP H0344794 U JPH0344794 U JP H0344794U
- Authority
- JP
- Japan
- Prior art keywords
- wall
- scattered light
- reflective
- light type
- detector according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000779 smoke Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims 4
- 230000003287 optical effect Effects 0.000 claims 2
- 230000001154 acute effect Effects 0.000 claims 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Description
第１図は、この考案の実施例を示す断面図で第
２図の−線断面拡大図、第２図は、使用状態
を示す縦断面図である。
４……発光素子、１３……反射壁、１３ａ……
反射面、１４……防御壁、１４ａ……防御面、１
５……防御壁、１５ａ……防御面、２１ａ……煙
の通口、２１ｂ……煙の通口。
FIG. 1 is a cross-sectional view showing an embodiment of the invention, an enlarged cross-sectional view taken along the line - in FIG. 2, and FIG. 2 is a vertical cross-sectional view showing the state of use. 4...Light emitting element, 13...Reflection wall, 13a...
Reflective surface, 14...Defensive wall, 14a...Defensive surface, 1
5...Defensive wall, 15a...Defensive surface, 21a...Smoke vent, 21b...Smoke vent.
Claims (1)
反射壁の前方及び後方に形成された煙の通口；該
反射壁の反射面に対向する防御面を有し、かつ、
前記煙の通口を介して該反射壁を囲む断面く字状
の防御壁；とを備えたことを特徴とする散乱光式
煙感知器。 (2) 防御壁が、その内側先端を鋭角に形成され
ている事を特徴とする請求項第１記載の散乱光式
煙感知器。 (3) 反射面と光軸との交角が、防御面と光軸と
の交角より小さいことを特徴とする第１記載の散
乱光式煙感知器。 (4) 断面矢印状の反射壁が、円錐形に形成され
ている事を特徴とする請求項第１記載の散乱光式
煙感知器。 (5) 防御壁が、外壁と連続していることを特徴
とする請求項第１記載の散乱光式煙感知器。[Claims for Utility Model Registration] (1) A reflective wall with an arrow-shaped cross section facing the light emitting element; smoke vents formed in front and behind the reflective wall; a defensive surface facing the reflective surface of the reflective wall; have, and
A scattered light type smoke sensor comprising: a protective wall having a dogleg-shaped cross section and surrounding the reflecting wall through the smoke vent. (2) The scattered light type smoke detector according to claim 1, wherein the inner tip of the protective wall is formed at an acute angle. (3) The scattered light type smoke detector according to the first aspect, wherein the angle of intersection between the reflective surface and the optical axis is smaller than the angle of intersection between the protective surface and the optical axis. (4) The scattered light type smoke detector according to claim 1, wherein the reflective wall having an arrow-shaped cross section is formed in a conical shape. (5) The scattered light type smoke detector according to claim 1, wherein the protective wall is continuous with the outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989106224U JP2506304Y2 (en) | 1989-09-12 | 1989-09-12 | Scattered light smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989106224U JP2506304Y2 (en) | 1989-09-12 | 1989-09-12 | Scattered light smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0344794U true JPH0344794U (en) | 1991-04-25 |
| JP2506304Y2 JP2506304Y2 (en) | 1996-08-07 |
Family
ID=31654962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989106224U Expired - Lifetime JP2506304Y2 (en) | 1989-09-12 | 1989-09-12 | Scattered light smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506304Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010238109A (en) * | 2009-03-31 | 2010-10-21 | Nohmi Bosai Ltd | Photoelectric smoke sensor |
| WO2013001966A1 (en) * | 2011-06-30 | 2013-01-03 | ホーチキ株式会社 | Scattered light-type smoke detection apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716955U (en) * | 1980-07-01 | 1982-01-28 | ||
| JPS6237751U (en) * | 1985-08-24 | 1987-03-06 |
-
1989
- 1989-09-12 JP JP1989106224U patent/JP2506304Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5716955U (en) * | 1980-07-01 | 1982-01-28 | ||
| JPS6237751U (en) * | 1985-08-24 | 1987-03-06 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010238109A (en) * | 2009-03-31 | 2010-10-21 | Nohmi Bosai Ltd | Photoelectric smoke sensor |
| WO2013001966A1 (en) * | 2011-06-30 | 2013-01-03 | ホーチキ株式会社 | Scattered light-type smoke detection apparatus |
| JPWO2013001966A1 (en) * | 2011-06-30 | 2015-02-23 | ホーチキ株式会社 | Scattered light smoke detector |
| US9157854B2 (en) | 2011-06-30 | 2015-10-13 | Hochiki Corporation | Scattered light-type smoke detection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2506304Y2 (en) | 1996-08-07 |