JPH08138166A - Waterproof structure of smoke sensor - Google Patents
Waterproof structure of smoke sensorInfo
- Publication number
- JPH08138166A JPH08138166A JP27336394A JP27336394A JPH08138166A JP H08138166 A JPH08138166 A JP H08138166A JP 27336394 A JP27336394 A JP 27336394A JP 27336394 A JP27336394 A JP 27336394A JP H08138166 A JPH08138166 A JP H08138166A
- Authority
- JP
- Japan
- Prior art keywords
- sponge
- rubber sponge
- main body
- smoke
- peripheral wall
- 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
Landscapes
- Fire-Detection Mechanisms (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、感知器回路の収納部に
対する外部からの水分や腐食性ガスの侵入を防止する煙
感知器の防水構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a smoke sensor which prevents moisture and corrosive gas from entering the housing of a sensor circuit from the outside.
【０００２】[0002]
【従来の技術】この種の煙感知器では、感知器本体の内
部に回路収納部を形成し、その中に煙を検知するための
感知器回路を実装したプリント基板を組込んでおり、こ
の回路収納部に組込んだプリント基板の実装電子部品、
導電パターン、及び電子部品及び導電パターンとの半田
付け部分などを外部からの腐食ガスや水から保護するた
め、回路収納部を仕切り形成する各部材の組合せを防水
構造としなければならない。2. Description of the Related Art In this type of smoke sensor, a circuit housing is formed inside the sensor body, and a printed circuit board having a sensor circuit for detecting smoke is incorporated therein. Printed circuit board mounting electronic components incorporated in the circuit housing,
In order to protect the conductive pattern, the electronic parts, and the soldered parts with the conductive pattern from the external corrosive gas and water, the combination of the respective members that form the partition of the circuit housing portion must have a waterproof structure.
【０００３】このような従来の防水構造では、Ｏリング
を用いたり、各部材を溶着する方法が取られている。In such a conventional waterproof structure, an O-ring is used or each member is welded.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、Ｏリン
グを用いる方法では製造作業が繁雑になるという問題点
があり、また、溶着する方法では溶着部分が経時的に劣
化するという問題点がある。本発明は、このような従来
の問題点に鑑みてなされたもので、安価な構成で内部を
確実に防水することができる煙感知器の防水構造を提供
することを目的とする。However, the method using the O-ring has a problem that the manufacturing work is complicated, and the welding method has a problem that the welded portion deteriorates with time. The present invention has been made in view of such conventional problems, and an object thereof is to provide a waterproof structure for a smoke detector that can reliably waterproof the inside with an inexpensive configuration.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
本発明による煙感知器の防水構造は、下面側に煙検出部
が装着される略円筒形の形状を有し、上面の周縁に周壁
を立設すると共に周壁内側に中央の段部に対し段下げさ
れたスポンジ収納部を形成した検煙部本体と、検煙部本
体に形成したスポンジ収納部に組み込まれその段差より
厚く形成されたリング形状のゴムスポンジと、外形がゴ
ムスポンジより小さく形成されると共に検煙部本体に形
成された段部及びスポンジ収納部に組込まれたゴムスポ
ンジの上に位置決めされる円形のプリント基板と、検煙
部本体の周壁部を嵌合するように２重の環状の周壁部を
形成すると共に、内側の周壁部でプリント基板の外側で
ゴムスポンジを押圧する略円筒形の端子盤とを備え、検
煙部本体の上にゴムスポンジと基板を位置決めして押圧
固定し、端子盤の内側の周壁部をゴムスポンジに押圧し
た状態で端子盤と検煙部本体をネジ止めしたことを特徴
とする。To achieve this object, a waterproof structure for a smoke detector according to the present invention has a substantially cylindrical shape in which a smoke detecting portion is mounted on a lower surface side, and a peripheral wall on a peripheral edge of an upper surface. The smoke detector main body that has a sponge storage portion that is erected and that is stepped down from the central step on the inside of the peripheral wall, and that is built into the sponge storage portion that is formed in the smoke detection portion main body and is formed thicker than the step A ring-shaped rubber sponge, a circular printed circuit board whose outer shape is smaller than that of the rubber sponge, and a circular printed circuit board which is positioned on the step formed on the main body of the smoke detector and the rubber sponge incorporated in the sponge housing. A double cylindrical peripheral wall portion is formed so as to fit the peripheral wall portion of the smoke part main body, and a substantially cylindrical terminal board that presses the rubber sponge on the outside of the printed board with the inside peripheral wall portion is provided. Go over the smoke body Pressed position and fix the sponge and the substrate, the inner peripheral wall of the terminal block, characterized in that screwed the terminal board and smoke detection portion main body in a state of being pressed against the rubber sponge.
【０００６】本発明はまた、検煙部本体のスポンジ収納
部には、基板の固定時に溶着されるボスが形成されると
共に、ゴムスポンジにはボスが貫通する開口が形成さ
れ、検煙部本体のボスとゴムスポンジの開口が中心線に
対して対称に形成されていることを特徴とする。According to the present invention, a boss that is welded when the substrate is fixed is formed in the sponge housing portion of the smoke detecting unit body, and an opening through which the boss penetrates is formed in the rubber sponge. The boss and the opening of the rubber sponge are formed symmetrically with respect to the center line.
【０００７】[0007]
【作用】このような本発明の煙感知器の防水構造によれ
ば、検煙部本体の回路収納部側に、中央の段部よりゴム
スポンジの厚さより小さい段差で段下げしたスポンジ収
納部を形成し、プリント基板をゴムスポンジを介して検
煙部本体に押圧固定することで、ゴムスポンジの押圧に
よる密着状態により検煙部本体側からの水分や腐食性ガ
スの侵入を確実に遮断して防水できる。また、端子盤の
周壁部がプリント基板に当接することなくゴムスポンジ
を押圧した状態で固定されているので、プリント基板の
組込部分に対する端子盤側からの水分や腐食性ガスの侵
入も確実に遮断して防水できる。このため、安価な構成
で感知器回路を収納する内部を確実に防水することがで
きる。According to the waterproof structure of the smoke detector of the present invention as described above, the sponge accommodating portion, which is stepped down by a step smaller than the thickness of the rubber sponge from the central step, is provided on the circuit accommodating portion side of the smoke detector main body. By forming and pressing and fixing the printed circuit board to the smoke detector body via a rubber sponge, the intrusion of moisture and corrosive gas from the smoke detector body side can be reliably blocked by the close contact state due to the pressing of the rubber sponge. Can be waterproof. In addition, since the peripheral wall of the terminal board is fixed while pressing the rubber sponge without contacting the printed circuit board, it is possible to ensure that moisture or corrosive gas does not enter the built-in part of the printed circuit board from the terminal board side. It can be blocked and waterproof. Therefore, it is possible to reliably waterproof the inside of the sensor circuit that is housed with an inexpensive structure.
【０００８】また、ゴムスポンジの切欠部や開口穴が中
心線に対して対称に形成されているため、ゴムスポンジ
に表と裏がなく、検煙部本体に嵌合する際に組み立てミ
スを起こすことがなく、確実に防水することができる。Further, since the notch portion and the opening hole of the rubber sponge are formed symmetrically with respect to the center line, the rubber sponge does not have a front side and a back side, and an assembly error occurs when the rubber sponge is fitted to the smoke detecting section body. And can be reliably waterproofed.
【０００９】[0009]
【実施例】以下、図面を参照して本発明の実施例を説明
する。図１は本発明に係る光電式煙感知器の一実施例を
示す組立分解図であり、感知器本体を構成する。図１に
おいて、嵌合金具１０は、天井に取り付けられる感知器
ベース（図示省略）に対して感知器本体側の端子盤１１
を電気的且つ機械的に接続するために用いられ、また、
ネジ２４により基板１３の導電パターンと電気的に接続
されるように構成されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded view showing an embodiment of a photoelectric smoke detector according to the present invention, which constitutes a detector body. In FIG. 1, the fitting 10 is a terminal board 11 on the sensor body side with respect to a sensor base (not shown) mounted on the ceiling.
Is used to electrically and mechanically connect the
The screw 24 is configured to be electrically connected to the conductive pattern of the substrate 13.
【００１０】端子盤１１に対しては、感知器ベース側か
ら順次シールドケース１２、プリント基板１３、ゴムス
ポンジ１４、検煙部本体１５、検煙部カバー１６、外カ
バー１７が取り付けられ、感知器ベースと端子盤１１か
ら外カバー１７までの各部材１１〜１７はお互いに嵌合
可能なように略円筒形又は円形で形成されている。ここ
で端子盤１１に対する検煙部本体１５の組み付けによ
り、その間にシールドケース１２を備えた回路収納部が
形成される。この回路収納部の中には感知器回路の電子
部品を実装したプリント基板１３が組込まれる。またゴ
ムスポンジ１４の組み込みにより後の説明で明らかにす
る本発明の防水構造が実現される。A shield case 12, a printed circuit board 13, a rubber sponge 14, a smoke detector main body 15, a smoke detector cover 16 and an outer cover 17 are attached to the terminal board 11 in this order from the sensor base side. The members 11 to 17 from the base and the terminal board 11 to the outer cover 17 are formed in a substantially cylindrical shape or a circular shape so that they can be fitted to each other. By assembling the smoke detection section main body 15 to the terminal board 11, a circuit housing section including the shield case 12 is formed therebetween. The printed circuit board 13 on which the electronic components of the sensor circuit are mounted is incorporated in the circuit housing portion. Further, by incorporating the rubber sponge 14, the waterproof structure of the present invention, which will be made clear later, is realized.
【００１１】続いて検煙部本体１５と検煙部カバー１６
により包囲される空間が検煙室を構成し、検煙部本体１
５の下面（検煙部カバー１６側）には、煙検出用ＬＥＤ
１８、テスト用ＬＥＤ１９、受光素子（ＰＤ）２０が取
り付けられる。検煙部本体１５にはまた、煙検出用ＬＥ
Ｄ１８が取り付けられた後に発光部カバー２１が取り付
けられると共に、テスト用ＬＥＤ１９及びＰＤ２０が近
接して取り付けられた後に受光部カバー２２が取り付け
られ、更に受光部カバー２２の上にシールドキャップ２
３が取り付けられる。Next, the smoke detector body 15 and the smoke detector cover 16
The smoke detection chamber is formed by the space surrounded by
On the lower surface of 5 (on the smoke detector cover 16 side), a smoke detection LED
18, a test LED 19, and a light receiving element (PD) 20 are attached. The smoke detection unit main body 15 also has an LE for smoke detection.
The light emitting unit cover 21 is attached after the D18 is attached, the light receiving unit cover 22 is attached after the test LED 19 and the PD 20 are attached in close proximity, and the shield cap 2 is further provided on the light receiving unit cover 22.
3 is attached.
【００１２】このＬＥＤ１８、１９及びＰＤ２０の各リ
ード線とシールドキャップ２３は、検煙部本体１５、ゴ
ムスポンジ１４及びプリント基板１３を貫通してプリン
ト基板１３の上面側で半田付けされる。また、端子盤１
１に対してネジ２４により検煙部本体１５を取り付ける
ことによりその間にシールドケース１２、プリント基板
１３及びゴムスポンジ１４が取り付けられ、ゴムスポン
ジ１４により端子盤１１と検煙部本体１５の間の周縁が
密閉される。検煙部カバー１６は検煙部本体１５に対し
て回転して嵌合することにより取り付けられ、また、外
カバー１７は感知器全体を覆うように端子盤１１に取り
付けられる。The lead wires of the LEDs 18, 19 and PD 20 and the shield cap 23 penetrate the smoke detector main body 15, the rubber sponge 14 and the printed circuit board 13 and are soldered on the upper surface side of the printed circuit board 13. Also, terminal board 1
1, the shield case 12, the printed circuit board 13 and the rubber sponge 14 are mounted between the smoke detection unit main body 15 and the peripheral edge between the terminal board 11 and the smoke detection unit main body 15 by the rubber sponge 14. Is sealed. The smoke detector cover 16 is attached by rotating and fitting with respect to the smoke detector main body 15, and the outer cover 17 is attached to the terminal board 11 so as to cover the entire sensor.
【００１３】図２〜図４を参照して本発明の防水構造を
詳細に説明する。まず、図２は検煙部本体１５に対する
ゴムスポンジ１４及びプリント基板１３の組込みを示
す。図２において、検煙部本体１５は円盤状の部材であ
り、回路収納部を形成する上側の周囲に周壁１５ａを形
成している。この周壁１５ａの内側にはスポンジ収納部
１５ｃが形成される。スポンジ収納部１５ｃの内側は検
煙部本体１５の中心側に形成した段部１５ｂで仕切られ
ている。The waterproof structure of the present invention will be described in detail with reference to FIGS. First, FIG. 2 shows the incorporation of the rubber sponge 14 and the printed circuit board 13 into the smoke detector body 15. In FIG. 2, the smoke detector main body 15 is a disk-shaped member, and has a peripheral wall 15a formed around the upper side forming the circuit housing. A sponge storage portion 15c is formed inside the peripheral wall 15a. The inside of the sponge housing portion 15c is partitioned by a step portion 15b formed on the center side of the smoke detector main body 15.
【００１４】この段部１５ｂに対するスポンジ収納部１
５ｃの段差は、ゴムスポンジ１４の組込み前の状態での
厚さより小さい寸法に作られている。このためスポンジ
収納部１５ｃにゴムスポンジ１４を組込むと、ゴムスポ
ンジ１４の面は中央の段部１５ｂより僅かに飛び出すよ
うになる。また中心側の段部１５ｂからスポンジ収納部
１５ｃに対しては、ゴムスポンジ１４を位置決めするた
めの突起部１５ｄが３ケ所に放射状に延在されている。
この突起部１５ｄには、図示省略されているが、ＬＥＤ
１８、１９及びＰＤ２０の各リード線を貫通するための
穴が形成されている。更に、中心側の段部１５ｂにはゴ
ムスポンジ１４の位置決めに使用する位置決め突起１５
ｅを設けている。更に、スポンジ収納部１５ｃの適宜位
置には、プリント基板１３を溶着により固定するための
ボス１５ｆと、プリント基板１３を位置決めするための
ボス１５ｇが形成されている。The sponge storage portion 1 for the step portion 15b
The step 5c is formed to have a size smaller than the thickness of the rubber sponge 14 before being assembled. For this reason, when the rubber sponge 14 is assembled in the sponge housing portion 15c, the surface of the rubber sponge 14 slightly protrudes from the central step 15b. Further, from the step portion 15b on the center side to the sponge housing portion 15c, projections 15d for positioning the rubber sponge 14 are radially extended at three places.
Although not shown in the figure, the LED 15 is provided on the protrusion 15d.
Holes for penetrating the lead wires of 18, 19 and PD 20 are formed. Further, a positioning protrusion 15 used for positioning the rubber sponge 14 is provided on the step portion 15b on the center side.
e is provided. Further, bosses 15f for fixing the printed circuit board 13 by welding and bosses 15g for positioning the printed circuit board 13 are formed at appropriate positions of the sponge housing portion 15c.
【００１５】ゴムスポンジ１４は外周が検煙部本体１５
のスポンジ収納部１５ｃに嵌合する大きさのリング形状
を有する。またゴムスポンジ１４には、検煙部本体１５
の３つの位置決め用突起１５ｄに嵌合する４つの放射状
の切欠部１４ｄ、検煙部本体１５の位置決め突起１５ｅ
に嵌合する位置決め切欠部１４ｅ、および検煙部本体１
５のボス１５ｆ、１５ｇが貫通する２つの長穴１４ｆと
通し穴１４ｇが形成されている。The outer circumference of the rubber sponge 14 is the smoke detector main body 15
It has a ring shape of a size that fits into the sponge storage portion 15c. The rubber sponge 14 has a smoke detector main body 15
Four radial notches 14d that fit into the three positioning protrusions 15d of FIG.
Positioning notch 14e and smoke detector main body 1
Two elongated holes 14f through which the five bosses 15f and 15g penetrate and a through hole 14g are formed.
【００１６】ゴムスポンジ１４に形成された切欠部１４
ｄ、長穴１４ｆ、及び穴１４ｇの各々は、図３に示すよ
うに、位置決め切欠部１４ｅを通る中心線に対して対称
に形成されている。したがって、ゴムスポンジ１４には
表面と裏面がなく、裏表を考慮することなく検煙部本体
１５のスポンジ収納部１５ｃに組み込むことができる。
このためゴムスポンジ１４の組み込みミスは起きず、確
実に防水することができる。Notch 14 formed in rubber sponge 14
As shown in FIG. 3, each of the d, the long hole 14f, and the hole 14g is formed symmetrically with respect to the center line passing through the positioning notch 14e. Therefore, the rubber sponge 14 does not have a front surface and a back surface, and can be incorporated in the sponge storage portion 15c of the smoke detector main body 15 without considering the front and back.
For this reason, the rubber sponge 14 can be reliably waterproofed without causing a mistake in assembling.
【００１７】図４は組立状態における本発明の防水構造
の断面図である。端子盤１１の下面の周縁は、検煙部本
体１５の周壁１５ａが嵌合するように、２重の環状の周
壁を形成している。ここで、検煙部本体１５のスポンジ
収納部１５ｃの段差は、約１ｍｍ、ゴムスポンジ１４の
厚さは約１．１ｍｍで形成されている。このため図４の
組立状態で、プリント基板１３はゴムスポンジ１４をス
ポンジ収納部１５ｃに押し付けて圧縮し、ゴムスポンジ
１４に対しプリント基板１３及びスポンジ収納部１５ｃ
の各々の接触面が十分に密着される。FIG. 4 is a sectional view of the waterproof structure of the present invention in an assembled state. The peripheral edge of the lower surface of the terminal board 11 is formed with a double annular peripheral wall so that the peripheral wall 15a of the smoke detector main body 15 fits. Here, the step of the sponge housing portion 15c of the smoke detector main body 15 is formed with a height of about 1 mm, and the rubber sponge 14 is formed with a thickness of about 1.1 mm. Therefore, in the assembled state of FIG. 4, the printed circuit board 13 presses the rubber sponge 14 against the sponge storage portion 15c and compresses the printed circuit board 13 and the sponge storage portion 15c with respect to the rubber sponge 14.
The contact surfaces of each of them are sufficiently adhered.
【００１８】また端子盤１１の周縁の内側の周壁部１１
ａの先端は、端子盤１１と検煙部本体１５の嵌合時に、
検煙部本体１５の段部１５ｂの表面よりスポンジ収納部
１５ｃの中に僅かに突出する長さに形成されている。こ
のため図４の組立状態で、周壁部１１ａの先端がゴムス
ポンジ１４を押圧し、ゴムスポンジ１４を検煙部本体１
５側に密着固定する。尚、検煙部本体１５に対する検煙
部カバー１６の取付けは、検煙部本体１６の回転により
係合片１６１を受け部１５１に嵌合させている。Further, the peripheral wall portion 11 inside the peripheral edge of the terminal board 11
When the terminal board 11 and the smoke detector main body 15 are fitted to each other, the tip of a is
It is formed to have a length that slightly protrudes from the surface of the step portion 15b of the smoke detecting portion main body 15 into the sponge housing portion 15c. Therefore, in the assembled state of FIG. 4, the tip of the peripheral wall portion 11a presses the rubber sponge 14, and the rubber sponge 14 is attached to the smoke detector main body 1
Fix tightly to the 5 side. The smoke detector cover 16 is attached to the smoke detector main body 15 by fitting the engaging piece 161 into the receiving portion 151 by rotating the smoke detector main body 16.
【００１９】ここで、ゴムスポンジ１４としては、例え
ば橋本ゴム工業株式会社のＣ−４３０５を用いることが
できる。このゴムスポンジは、密度が１９０±３０ｋｇ
／ｍ 3 、引っ張り強度が５ｋｇ／ｃｍ3 以上、伸びが１
５０％以上、耐熱収縮率が１．５％以下、圧縮永久歪み
が３０％以下、２５％圧縮荷重が６３１〜９５０ｇ／ｃ
ｍ3 、吸水率が５％以下、熱伝導率が０．０５０５Ｋｃ
ａｌ／ｍＨ℃、硬度が２５±５の特性をもつ。Here, as the rubber sponge 14, for example,
For example, you can use C-4305 from Hashimoto Rubber Industry Co., Ltd.
it can. This rubber sponge has a density of 190 ± 30kg
/ M 3, Tensile strength is 5kg / cm3Above, the growth is 1
50% or more, heat shrinkage of 1.5% or less, compression set
Is 30% or less, 25% compression load is 631-950 g / c
m3, Water absorption is less than 5%, thermal conductivity is 0.0505Kc
It has characteristics of al / mH ° C. and hardness of 25 ± 5.
【００２０】次に、本発明の防水構造を備えた光電式煙
感知器の組み立て手順を説明する。図１において、まず
検煙部本体１５にＬＥＤ１８、１９及びＰＤ２０を組み
込み、次いで煙検出用ＬＥＤ１８には発光部カバー２１
を、テスト用ＬＥＤ１９及びＰＤ２０には受光部カバー
２２を取り付け、更に受光部カバー２２にはシールドキ
ャップ２３を取り付ける。Next, a procedure for assembling the photoelectric smoke detector having the waterproof structure of the present invention will be described. In FIG. 1, first, LEDs 18, 19 and PD 20 are incorporated in the smoke detection unit main body 15, and then the smoke detection LED 18 is provided with a light emitting unit cover 21.
The light receiving unit cover 22 is attached to the test LED 19 and the PD 20, and the shield cap 23 is attached to the light receiving unit cover 22.
【００２１】次いで、検煙部本体１５のスポンジ収納部
１５ｃにゴムスポンジ１４を入れ、検煙部本体１５を貫
通しているＬＥＤ１８、１９及びＰＤ２０の各リード線
とシールドキャップ２３をプリント基板１３に貫通させ
る。この状態ではゴムスポンジ１４は検煙部本体１５の
段部１５ｂの段差より厚いので、プリント基板１３の下
面が検煙部本体１５の上の段１５ｂより浮いている。そ
こでプリント基板１３を押圧してゴムスポンジ１４を圧
縮した状態で、検煙部本体１５のボス１５ｆを溶着し、
プリント基板１３を検煙部本体１５に固定する。Next, the rubber sponge 14 is put in the sponge housing portion 15c of the smoke detecting portion main body 15, and the lead wires of the LEDs 18, 19 and PD 20 penetrating the smoke detecting portion main body 15 and the shield cap 23 are attached to the printed circuit board 13. To penetrate. In this state, the rubber sponge 14 is thicker than the step of the step portion 15b of the smoke detector main body 15, so that the lower surface of the printed circuit board 13 floats above the step 15b above the smoke detector main body 15. Then, the boss 15f of the smoke detector body 15 is welded in a state where the printed circuit board 13 is pressed to compress the rubber sponge 14,
The printed circuit board 13 is fixed to the smoke detector body 15.
【００２２】次いで、ＬＥＤ１８、１９及びＰＤ２０の
各リード線とシールドキャップ２３をプリント基板１３
上に半田付けし、次いで検煙部カバー１６を検煙部本体
１５等の組み立て体に組み込み、次いで検煙部本体１５
等の組み立て体にシールドケース１２、端子盤１１、嵌
合金具１０を組み込んでネジ２４により固定する。この
場合、ネジ２４によりプリント基板１３の導電パターン
と嵌合金具１０が電気的に接続される。またゴムスポン
ジ１４は、端子盤１１の周縁の内側の周壁部１１ａの先
端により押圧された状態で組込まれている。最終的に、
外カバーを端子盤１１に嵌合し感知器本体の組み立てが
完了する。Next, the lead wires of the LEDs 18, 19 and PD 20 and the shield cap 23 are attached to the printed circuit board 13.
Soldered on top, and then the smoke detector cover 16 is incorporated into an assembly such as the smoke detector main body 15, and then the smoke detector main body 15
The shield case 12, the terminal board 11, and the fitting metal fitting 10 are assembled into an assembly such as the above and fixed with screws 24. In this case, the conductive pattern of the printed circuit board 13 and the fitting 10 are electrically connected by the screw 24. Further, the rubber sponge 14 is assembled while being pressed by the tip of the peripheral wall portion 11a inside the peripheral edge of the terminal board 11. Finally,
The outer cover is fitted to the terminal board 11 to complete the assembly of the sensor body.
【００２３】図４を参照して機密性について説明する。
図４において、プリント基板１３を組込んだ回路収納部
に対し腐食性ガスや水分が侵入しようとする経路は、
〜の３つが考えられる。まず侵入経路は、端子盤１
１の周縁の外側から検煙部本体１５の周縁を介して腐食
性ガスや水分が流れ込もうとするものである。しかし、
ゴムスポンジ１４が検煙部本体１５に形成したスポンジ
収納部１５ｃの段差より厚く、端子盤１１の周縁の内側
の周壁部１１ａの先端でゴムスポンジ１４を押圧し、検
煙部本体１５の間を密閉しているため、侵入経路は確
実に遮断できる。Confidentiality will be described with reference to FIG.
In FIG. 4, the path through which the corrosive gas or water enters the circuit housing part in which the printed circuit board 13 is incorporated is
There are three possibilities. First, the entry route is the terminal board 1
The corrosive gas and the water try to flow in from the outside of the peripheral edge of No. 1 through the peripheral edge of the smoke detector main body 15. But,
The rubber sponge 14 is thicker than the step of the sponge housing portion 15c formed in the smoke detecting portion main body 15, and the rubber sponge 14 is pressed by the tip of the peripheral wall portion 11a inside the peripheral edge of the terminal board 11, so that the space between the smoke detecting portion main body 15 is Since it is hermetically sealed, the intrusion route can be reliably blocked.
【００２４】また、侵入経路は、検煙部カバー１６と
検煙部本体１５の嵌合部を介して腐食性ガスや水分が流
れ込もうとするものである。しかし、ゴムスポンジ１４
がプリント基板１３の組込固定で押圧されてスポンジ収
納部１５ｃに密着しているため、侵入経路も確実に遮
断できる。さらに侵入経路は、検煙室内の腐食性ガス
やが検煙部本体１５の穴を介してプリント基板１３のと
隙間から流れ込もうとするものである。しかし、プリン
ト基板１３の組込固定で、ゴムスポンジ１４が押圧され
スポンジ収納部１５ｃに密着しているため、侵入経路
も確実に遮断できる。Further, the invasion path is such that the corrosive gas or the water tends to flow in through the fitting portion between the smoke detecting portion cover 16 and the smoke detecting portion main body 15. However, the rubber sponge 14
Since the printed circuit board 13 is pressed and fixed to the sponge housing portion 15c by being fixedly mounted, the intrusion route can be surely blocked. Further, the invasion path is such that the corrosive gas or the like in the smoke detection chamber tries to flow into the printed circuit board 13 from the gap through the hole of the smoke detection unit main body 15. However, when the printed circuit board 13 is assembled and fixed, the rubber sponge 14 is pressed and is in close contact with the sponge housing portion 15c.
【００２５】尚、上記の実施例は、感知器を天井に取り
付けた状態で、上下左右の構造的な位置関係を説明して
いるが、これは相対的なものであり、感知器の向きが逆
になれば、それに応じた逆の関係になることはいうまで
もない。また本発明は、光電式煙感知器に限定されず、
イオン化式煙感知器にもそのまま適用することができ
る。In the above-mentioned embodiment, the structural positional relationship between the upper, lower, left and right is described with the sensor mounted on the ceiling. However, this is relative, and the orientation of the sensor is It goes without saying that if they are reversed, the relationship will be reversed accordingly. Further, the present invention is not limited to photoelectric smoke detectors,
It can be applied as it is to the ionization type smoke detector.
【００２６】[0026]
【発明の効果】以上説明したように本発明によれば、検
煙部本体の回路収納部側に、中央の段部よりゴムスポン
ジの厚さより小さい段差で段下げしたスポンジ収納部を
形成し、プリント基板をゴムスポンジを介して検煙部本
体に押圧固定することで、ゴムスポンジの押圧による密
着状態により検煙部本体側からの水分や腐食性ガスの侵
入を確実に遮断して防水できる。また、端子盤の周壁部
がプリント基板に当接することなくゴムスポンジを押圧
した状態で固定されているので、プリント基板の組込部
分に対する端子盤側からの水分や腐食性ガスの侵入も確
実に遮断して防水できる。このため、安価な構成で感知
器回路を収納する内部を確実に防水することができる。As described above, according to the present invention, a sponge storage portion is formed on the circuit storage portion side of the smoke detecting portion main body with a step difference smaller than the thickness of the rubber sponge from the central step portion, By pressing and fixing the printed circuit board to the smoke detecting section main body via the rubber sponge, it is possible to reliably block water and corrosive gas from the smoke detecting section main body side for waterproofing due to the close contact state due to the pressing of the rubber sponge. In addition, since the peripheral wall of the terminal board is fixed while pressing the rubber sponge without contacting the printed circuit board, it is possible to ensure that moisture or corrosive gas does not enter the built-in part of the printed circuit board from the terminal board side. It can be blocked and waterproof. Therefore, it is possible to reliably waterproof the inside of the sensor circuit that is housed with an inexpensive structure.
【００２７】また、ゴムスポンジの切欠部や開口穴が中
心線に対して対称に形成されているため、ゴムスポンジ
に表と裏がなく、検煙部本体に嵌合する際に組み立てミ
スを起こすことがなく、確実に防水することができる。Further, since the notch portion and the opening hole of the rubber sponge are formed symmetrically with respect to the center line, the rubber sponge does not have a front side and a back side, and an assembly error occurs when the rubber sponge is fitted to the smoke detecting section body. And can be reliably waterproofed.
【図１】本発明の光電式煙感知器の一実施例を示した組
立分解図FIG. 1 is an exploded view showing an embodiment of a photoelectric smoke detector of the present invention.
【図２】図１のプリント基板、ゴムスポンジ及び検煙部
本体の組立分解図FIG. 2 is an assembly exploded view of the printed circuit board, the rubber sponge, and the smoke detector body of FIG.
【図３】図１のゴムスポンジと検煙部本体の対称関係の
平面図FIG. 3 is a plan view of the symmetric relationship between the rubber sponge and the smoke detector body of FIG.
【図４】本発明の防水構造をもつ部分の断面図FIG. 4 is a sectional view of a portion having a waterproof structure of the present invention.
１０：嵌合金具 １１：端子盤 １１ａ：障壁部 １２：シールドケース １３：プリント基板 １３ａ：穴 １４：ゴムスポンジ １４ｄ：切欠部 １４ｅ：位置決め切欠部 １４ｆ：長穴 １４ｇ：通し穴 １５：検煙部本体 １５ａ：周壁部 １５ｂ：段部 １５ｃ：スポンジ収納部 １５ｄ：突起部 １５ｅ：位置決め突起部 １５ｆ：ボス（溶着用） １５ｇ：ボス（位置決め用） １６：検煙部カバー １７：外カバー １８，１９：ＬＥＤ ２０：受光素子（ＰＤ） ２１：発光部カバー ２２：受光部カバー ２３：シールドキャップ ２４：ネジ １５１：受け部 １６１：係合片 10: Fitting 11: Terminal board 11a: Barrier part 12: Shield case 13: Printed circuit board 13a: Hole 14: Rubber sponge 14d: Notch part 14e: Positioning notch part 14f: Long hole 14g: Through hole 15: Smoke detecting part Main body 15a: peripheral wall portion 15b: step portion 15c: sponge storage portion 15d: protrusion portion 15e: positioning protrusion portion 15f: boss (welding) 15g: boss (for positioning) 16: smoke detection portion cover 17: outer cover 18, 19 : LED 20: Light receiving element (PD) 21: Light emitting unit cover 22: Light receiving unit cover 23: Shield cap 24: Screw 151: Receiving unit 161: Engaging piece
Claims (2)
形状を有し、上面の周縁に周壁部を形成すると共に、該
周壁内側に中央の段部に対し段下げされたスポンジ収納
部を形成した検煙部本体と、 前記検煙部本体に形成した前記スポンジ収納部に組み込
まれ、その段差より厚く形成された円形のゴムスポンジ
と、 外形が前記ゴムスポンジより小さく形成されると共に、
前記検煙部本体に形成された前記段部及び前記スポンジ
収納部に組込まれた前記ゴムスポンジの上に位置決めさ
れる円形のプリント基板と、 前記検煙部本体の前記周壁を嵌合するように２重の環状
の周壁部を形成すると共に、内側の周壁部で前記プリン
ト基板の外側で前記ゴムスポンジを押圧する略円筒形の
端子盤とを備え、 前記検煙部本体の上に前記ゴムスポンジと基板を位置決
めして押圧固定し、前記端子盤の内側の周壁部を前記ゴ
ムスポンジに押圧した状態で前記端子盤と検煙部本体を
ネジ止めしたことを特徴とする煙感知器の防水構造。1. A sponge having a substantially cylindrical shape on which a smoke detecting portion is mounted on a lower surface side, forming a peripheral wall portion on a peripheral edge of an upper surface, and lowering a step portion at a center inside the peripheral wall. A smoke detection section body having a storage section, a circular rubber sponge formed in the sponge storage section formed in the smoke detection section body and having a thickness thicker than the step, and an outer shape formed smaller than the rubber sponge. With
A circular printed circuit board positioned on the step formed on the smoke detection unit main body and the rubber sponge incorporated in the sponge storage unit and the peripheral wall of the smoke detection unit main body are fitted together. A substantially cylindrical terminal board that forms a double annular peripheral wall portion and presses the rubber sponge outside the printed circuit board at the inner peripheral wall portion, and the rubber sponge is provided on the smoke detection unit main body. A waterproof structure for a smoke sensor, characterized in that the terminal board and the smoke detector main body are screwed in a state where the board is positioned and pressed and fixed, and the inner peripheral wall of the terminal board is pressed against the rubber sponge. .
て、前記検煙部本体に形成した前記スポンジ収納部に
は、前記プリント基板の固定時に溶着されるボスが形成
されると共に、前記ゴムスポンジには前記ボスが貫通す
る開口が形成され、前記検煙部本体のボスとゴムスポン
ジの開口が中心線に対して対称に形成されていることを
特徴とする感知器。2. The waterproof structure for a smoke detector according to claim 1, wherein the sponge housing portion formed in the smoke detector body has a boss welded when the printed circuit board is fixed. The rubber sponge has an opening through which the boss penetrates, and the boss of the smoke detector body and the opening of the rubber sponge are formed symmetrically with respect to a center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6273363A JP3032688B2 (en) | 1994-11-08 | 1994-11-08 | Waterproof structure of smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6273363A JP3032688B2 (en) | 1994-11-08 | 1994-11-08 | Waterproof structure of smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08138166A true JPH08138166A (en) | 1996-05-31 |
| JP3032688B2 JP3032688B2 (en) | 2000-04-17 |
Family
ID=17526863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6273363A Expired - Fee Related JP3032688B2 (en) | 1994-11-08 | 1994-11-08 | Waterproof structure of smoke detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3032688B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003141654A (en) * | 2001-10-31 | 2003-05-16 | Nohmi Bosai Ltd | Photoelectric smoke sensor |
| KR101657155B1 (en) * | 2016-02-18 | 2016-09-20 | 디투유이앤씨(주) | Warning light assembly |
| US9620747B2 (en) | 2014-04-11 | 2017-04-11 | Samsung Sdi Co., Ltd. | Secondary battery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425316B (en) * | 2011-10-10 | 2013-08-21 | 杭州佳合舞台设备有限公司 | Stage board rotating device of butterfly-shaped stage |
-
1994
- 1994-11-08 JP JP6273363A patent/JP3032688B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003141654A (en) * | 2001-10-31 | 2003-05-16 | Nohmi Bosai Ltd | Photoelectric smoke sensor |
| US9620747B2 (en) | 2014-04-11 | 2017-04-11 | Samsung Sdi Co., Ltd. | Secondary battery |
| KR101657155B1 (en) * | 2016-02-18 | 2016-09-20 | 디투유이앤씨(주) | Warning light assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3032688B2 (en) | 2000-04-17 |
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