JPH01116894U

JPH01116894U -

Info

Publication number: JPH01116894U
Application number: JP1089688U
Authority: JP
Priority date: 1988-01-29
Filing date: 1988-01-29
Publication date: 1989-08-07
Anticipated expiration: 2003-01-29
Also published as: JP2504836Y2

Description

[Brief explanation of the drawing]

第１図は本考案の中間電極取付構造を備えたイ
オン化式煙感知器の一実施例を示した断面図；第
２図は第１図の感知器本体の組立分解図；第３図
は本考案の中間電極を取出して示した平面図；第
４図は第３図の側面図；第５図は第１図の絶縁板
を取出して示した断面図；第６図は絶縁板の裏面
側の平面図；第７図は絶縁板の表面側の平面図；
第８図は絶縁板に対する中間電極の取付構造を取
出して示した断面図である。１：感知器本体、２：感知器ベース、３：本体
カバー、３ａ：内部開口部、４，９ａ：煙流入口
、５：外カバー、６：絶縁板、７：内部電極、７
ａ：電極部材、７ｂ：放射線源、７ｃ：電極カバ
ー、８：中間電極、９：外部電極、１０：回路基
板、１１：シールドケース、１２：ＦＥＴ、１３
：ＦＥＴ収納部、１４：隔壁、１５：電極リード
、１６：コンタクトピン、１７：嵌合端子、１８
：接触金具、１９：接触部、２０：底板、２１：
防虫網、２２：開口穴、２３：電極片、２４ａ〜
２４ｃ：支持脚部、２５：鋸歯状突起、２６：嵌
合鍔部、２７：嵌合溝、２８：電極取付穴、２９
：多段リング溝、３０，３３：スリツト穴、３１
：コンデンサ収納部、３２：ＦＥＴ取付穴、３４
ａ〜３４ｃ：嵌合穴、３５：切欠。 Fig. 1 is a sectional view showing an embodiment of the ionization type smoke detector equipped with the intermediate electrode mounting structure of the present invention; Fig. 2 is an exploded view of the main body of the sensor shown in Fig. 1; Fig. 3 is the main body of the sensor shown in Fig. 1; Figure 4 is a side view of Figure 3; Figure 5 is a sectional view of the insulating plate of Figure 1; Figure 6 is the back side of the insulating plate. 7 is a plan view of the front side of the insulating plate;
FIG. 8 is a cross-sectional view showing the attachment structure of the intermediate electrode to the insulating plate. 1: Sensor main body, 2: Sensor base, 3: Main body cover, 3a: Internal opening, 4, 9a: Smoke inlet, 5: Outer cover, 6: Insulating plate, 7: Internal electrode, 7
a: electrode member, 7b: radiation source, 7c: electrode cover, 8: intermediate electrode, 9: external electrode, 10: circuit board, 11: shield case, 12: FET, 13
: FET storage part, 14: Partition wall, 15: Electrode lead, 16: Contact pin, 17: Fitting terminal, 18
: Contact fitting, 19: Contact part, 20: Bottom plate, 21:
Insect screen, 22: Opening hole, 23: Electrode piece, 24a~
24c: Support leg portion, 25: Serrated projection, 26: Fitting collar portion, 27: Fitting groove, 28: Electrode mounting hole, 29
: Multi-stage ring groove, 30, 33: Slit hole, 31
: Capacitor storage, 32: FET mounting hole, 34
a to 34c: fitting hole, 35: notch.

Claims

[Claims for Utility Model Registration] An internal electrode provided with a radiation source, an intermediate electrode provided with an opening hole through which radiation from the radiation source passes, and an external electrode disposed outside the intermediate electrode and provided with a smoke inlet. In an ionization type smoke detector having a structure in which an electrode is attached to an insulating plate, a plurality of support legs are integrally formed around the outer periphery of the intermediate electrode, and an electrode formed on any one of the support legs. Connecting the lead to a lead of an FET installed in a predetermined position on the back side of the insulating plate in an insulated sealed state,
An intermediate electrode mounting structure for an on-type smoke detector, characterized in that the other support leg part has sawtooth projections formed on its side and is pushed and fixed into a fitting hole opened on the surface side of the insulating plate.