JPH0436694U - - Google Patents
Info
- Publication number
- JPH0436694U JPH0436694U JP7892190U JP7892190U JPH0436694U JP H0436694 U JPH0436694 U JP H0436694U JP 7892190 U JP7892190 U JP 7892190U JP 7892190 U JP7892190 U JP 7892190U JP H0436694 U JPH0436694 U JP H0436694U
- Authority
- JP
- Japan
- Prior art keywords
- printed circuit
- circuit board
- circuit component
- component mounting
- electrode
- 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.)
- Pending
Links
- 239000000779 smoke Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Landscapes
- Fire-Detection Mechanisms (AREA)
Description
第１図および第２図は本考案に係るイオン化式
煙感知器を示す図であり、第１図は要部断面図、
第２図はプリント基板とパツキンを収めた支持台
の正面図、第３図は従来のイオン化式煙感知器を
示す要部断面図である。
１……内電極、２……中間電極、３……外電極
、３ａ……開口、４……放射線源、６……支持台
、８……回路部品、９……プリント基板、９ａ…
…回路部品実装部の略周縁、１１……凹室、１３
……基台、１４……パツキン、Ａ……内イオン室
、Ｂ……外イオン室。
1 and 2 are diagrams showing an ionization type smoke detector according to the present invention, and FIG. 1 is a sectional view of the main part;
FIG. 2 is a front view of a support base containing a printed circuit board and packing, and FIG. 3 is a sectional view of a main part of a conventional ionization type smoke detector. DESCRIPTION OF SYMBOLS 1... Inner electrode, 2... Intermediate electrode, 3... Outer electrode, 3a... Opening, 4... Radiation source, 6... Support stand, 8... Circuit component, 9... Printed circuit board, 9a...
...Substantially the periphery of the circuit component mounting section, 11...Concave chamber, 13
...Base, 14...Putkin, A...Inner ion chamber, B...Outer ion chamber.
Claims (1)
囲むイオン室を形成する中間電極と、この中間電
極を囲み内部に形成される外イオン室内に煙を流
入させる開口が形成された外電極と、イオン電流
で煙を感知する回路部品を実装したプリント基板
と、一面側に前記各電極が取り付けられ他面側に
前記プリント基板を収める凹室が形成された支持
台と、この支持台を凹室側から覆う基台とを備え
たイオン化式煙感知器であつて、前記プリント基
板の回路部品実装部の略周縁を象つたパツキンを
前記基台と前記プリント基板の回路部品実装面と
の間に介装挟持して、前記プリント基板の回路部
品実装部を外気から隔離密閉することを特徴とす
るイオン化式煙感知器。 An inner electrode on which a radiation source is placed, an intermediate electrode that forms an ion chamber surrounding this inner electrode, and an outer electrode that has an opening that allows smoke to flow into the outer ion chamber that surrounds this intermediate electrode and is formed inside. a printed circuit board on which a circuit component for detecting smoke using ionic current is mounted; a support base having the electrodes attached to one side and a concave chamber in which the printed circuit board is housed on the other side; The ionization smoke detector is equipped with a base that covers from the side of the recessed chamber, and a gasket shaped approximately around the periphery of the circuit component mounting portion of the printed circuit board is placed between the base and the circuit component mounting surface of the printed circuit board. An ionization type smoke detector characterized in that the circuit component mounting portion of the printed circuit board is isolated and sealed from the outside air by being sandwiched between the printed circuit boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7892190U JPH0436694U (en) | 1990-07-24 | 1990-07-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7892190U JPH0436694U (en) | 1990-07-24 | 1990-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436694U true JPH0436694U (en) | 1992-03-27 |
Family
ID=31622622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7892190U Pending JPH0436694U (en) | 1990-07-24 | 1990-07-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436694U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01171099A (en) * | 1987-12-26 | 1989-07-06 | Hochiki Corp | Moisture-proof structure for ionization type smoke sensor |
-
1990
- 1990-07-24 JP JP7892190U patent/JPH0436694U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01171099A (en) * | 1987-12-26 | 1989-07-06 | Hochiki Corp | Moisture-proof structure for ionization type smoke sensor |
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