JPH03110597U

JPH03110597U -

Info

Publication number: JPH03110597U
Application number: JP1792590U
Authority: JP
Priority date: 1990-02-23
Filing date: 1990-02-23
Publication date: 1991-11-13
Anticipated expiration: 2005-02-23
Also published as: JP2545368Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の断面図、第２図は
シールドリングにより耐風性を得る場合の説明図
、第３図はシールドリングの外電極への取付構造
を示す斜視図、第４図は同上の取付後の断面図、
第５図はシールドリングの外電極への別の取付構
造を示す斜視図、第６図はシールドリングの外電
極へのさらに別の取付構造を示す斜視図、第７図
は同上の取付後の断面図、第８図はイオン化式煙
感知器の全体構成を示す分解斜視図、第９図ａ，
ｂはカバーの平面図及び断面図、第１０図ａ〜ｃ
はキヤツプの底面図、断面図及び要部の拡大断面
図、第１１図は防虫網の取付構造を示す断面図、
第１２図及び第１３図は夫々別の電磁波による影
響を防止する方法の説明図、第１４図は従来のイ
オン化式煙感知器の問題点の説明図である。１……外電極、１ａ……穴、５……シールドリ
ング、５ｃ，５ｆ……爪、５ｄ……係合片、１ｂ
……挿入穴である。 Fig. 1 is a cross-sectional view of one embodiment of the present invention, Fig. 2 is an explanatory diagram when obtaining wind resistance with a shield ring, Fig. 3 is a perspective view showing the mounting structure of the shield ring to the outer electrode, and Fig. 4 The figure is a cross-sectional view after installation of the same as above.
Fig. 5 is a perspective view showing another mounting structure of the shield ring to the outer electrode, Fig. 6 is a perspective view showing still another mounting structure of the shield ring to the outer electrode, and Fig. 7 is a perspective view showing the same mounting structure as above. A sectional view, FIG. 8 is an exploded perspective view showing the overall configuration of the ionization smoke detector, and FIG. 9a,
b is a plan view and a sectional view of the cover, Figures 10 a to c
11 is a bottom view, cross-sectional view, and enlarged cross-sectional view of the main parts of the cap, and FIG. 11 is a cross-sectional view showing the installation structure of the insect screen.
FIGS. 12 and 13 are explanatory diagrams of methods for preventing the effects of different electromagnetic waves, respectively, and FIG. 14 is an explanatory diagram of problems with conventional ionization smoke detectors. 1... Outer electrode, 1a... Hole, 5... Shield ring, 5c, 5f... Claw, 5d... Engaging piece, 1b
...This is an insertion hole.

Claims

[Scope of Claim for Utility Model Registration] (1) In an ionization type smoke sensor equipped with an electrode having an ion chamber and a hole through which smoke flows into the ion chamber, a metal An ionization type smoke detector characterized in that a shield member is provided and a hole in an electrode is covered with the shield member. (2) The ionization smoke detector according to claim 1, wherein the shield member is attached to the electrode, and a fixing portion for fixing the shield member to the electrode is formed on the shield member or on both the shield member and the electrode. . (3) The ionization type smoke detector according to claim 2, wherein a plurality of claws cut and raised inwardly are formed on the shield member, and an electrode is fitted between these claws to fix the shield member to the electrode. . (4) Form a plurality of notches in the shield member with a plurality of engagement pieces that penetrate one step inside, and also form a plurality of insertion holes into which the engagement pieces are inserted into the electrodes, and insert the engagement pieces into the insertion holes. 3. The ionization type smoke detector according to claim 2, wherein the shield member is fixed to the electrode by sandwiching the electrode insertion hole forming part between the engaging piece and its peripheral part while the shield member is rotated.