JP4999812B2 - Fire alarm - Google Patents

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JP4999812B2
JP4999812B2 JP2008256011A JP2008256011A JP4999812B2 JP 4999812 B2 JP4999812 B2 JP 4999812B2 JP 2008256011 A JP2008256011 A JP 2008256011A JP 2008256011 A JP2008256011 A JP 2008256011A JP 4999812 B2 JP4999812 B2 JP 4999812B2
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smoke
fire
light receiving
light
fire alarm
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JP2010086369A (en
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智宏 星野
尚 伊藤
克裕 鈴木
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Nohmi Bosai Ltd
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本発明は火災警報器に関し、特に小型化、薄型化が可能な火災警報器に関する。   The present invention relates to a fire alarm, and more particularly to a fire alarm capable of being reduced in size and thickness.

火災警報器等の火災を検知する装置には、電池を駆動電源としたものがある。このような電池を駆動電源とした従来の火災警報器(検知器)としては、例えば「本体の底部に複数の支持リブからなる電池保持部を設けると共に、プリント基板の一部を切除して電池収容部を形成し、プリント基板の電池収容部の両側に設けた電池の端子接続部の一方を電池収容部から離れた位置に設け、他方の端子接続部を電池収容部に近接して設けた」(例えば、特許文献1参照)というものが提案されている。   Some devices for detecting a fire, such as a fire alarm, use a battery as a driving power source. As a conventional fire alarm (detector) using such a battery as a driving power source, for example, “a battery holding portion made of a plurality of support ribs is provided at the bottom of the main body, and a part of the printed circuit board is cut away. A housing portion is formed, one of the battery terminal connection portions provided on both sides of the battery housing portion of the printed circuit board is provided at a position away from the battery housing portion, and the other terminal connection portion is provided close to the battery housing portion. (For example, refer to Patent Document 1).

特開平9−293181号公報(段落0010、第1図)JP-A-9-293181 (paragraph 0010, FIG. 1)

しかしながら、従来の火災警報器(検知器)は、火災検出部と、それを避けるように別の場所に電池収納部(電池収容部)と、が設けられていた。したがって、火災警報器(検知器)を小型化、薄型化できないという問題点があった。   However, the conventional fire alarm (detector) is provided with a fire detection part and a battery storage part (battery storage part) in another place so as to avoid it. Therefore, there has been a problem that the fire alarm (detector) cannot be reduced in size and thickness.

本発明は、上記のような課題を解決するためになされたものであり、小型化、薄型化することが可能な火災警報器を得ることを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a fire alarm that can be reduced in size and thickness.

本発明に係る火災警報器は、火災検出部である検煙部と、該検煙部の出力信号に基づいて火災を判断する火災判別部と、前記火災判別部に電源供給するための電池を収納する電池収納部と、を有し、前記火災判別部が火災と判断すると火災警報を出力する火災警報器において、前記検煙部は、該検煙部に外光が入射することを防止する壁体と、該検煙部の内部に光を照射する発光素子と、該発光素子から照射され、前記検煙部の煙粒子により生じる散乱光を受光する受光素子と、前記発光素子の照射範囲と前記受光素子の受光範囲との重合部である煙検出部と、を備え、前記電池収納部は、前記検煙部における検出機能に支障がない部分を切り欠くようにして形成されているものである。 Fire alarm according to the present invention includes: a smoke detection portion is a fire detector, a fire determination section for determining a fire on the basis of the output signal of the smoke detection portion, a battery for supplying power to the fire discriminating section A fire alarm that outputs a fire alarm when the fire determination unit determines that a fire has occurred , and the smoke detection unit prevents external light from entering the smoke detection unit. A wall, a light emitting element that emits light to the inside of the smoke detector, a light receiving element that receives scattered light emitted from the smoke element of the smoke detector, and an irradiation range of the light emitting element And a smoke detection part that is a superposition part of the light receiving range of the light receiving element, and the battery storage part is formed so as to cut out a part that does not hinder the smoke detection function in the smoke detection part. Is.

また、前記電池収納部は、前記検煙部における、前記発光素子の前記煙検出部までの照射範囲及び前記受光素子の前記煙検出部までの受光範囲を避けた部分を切り欠くようにして形成されているものである。 Further, the prior SL battery housing portion, in the smoke detection portion, so as to cut out the irradiation range and partial avoiding the receiving range of up to the smoke detection portion of the light receiving element to the smoke detection portion of the light emitting element Is formed.

また、前記電池収納部は、前記発光素子の光軸と前記受光素子の光軸とのなす角度が鋭角となる側の前記検煙部を切り欠くようにして形成されているものである。   The battery housing part is formed so as to cut out the smoke detecting part on the side where the angle formed by the optical axis of the light emitting element and the optical axis of the light receiving element is an acute angle.

本発明においては、検煙部における検出機能に支障がない部分を切り欠くようにして電池収納部が形成されているので、火災警報器を小型化、薄型化することができる。
In the present invention, since the battery housing so as to cut out portions do not hinder the smoke detecting function is formed in the smoke detection portion, miniaturization of the fire alarm can be made thinner.

例えば、散乱光式の火災警報器においては、検煙部における、発光素子の煙検出部までの照射範囲及び受光素子の前記煙検出部までの受光範囲を避けた部分を切り欠くようにして電池収納部を形成することで、火災警報器を小型化、薄型化することができる。   For example, in a scattered light type fire alarm device, a battery is formed by cutting out the portion of the smoke detector that avoids the irradiation range to the smoke detector of the light emitting element and the light receiving range of the light receiver to the smoke detector. By forming the storage portion, the fire alarm can be reduced in size and thickness.

このとき、発光素子の光軸と前記受光素子の光軸とのなす角度が鋭角となる側の検煙部(火災検出部)を切り欠くようにして電池収納部を形成すると、検煙部の煙検出機能へ与える影響が最も少ない。   At this time, if the battery housing part is formed so as to cut out the smoke detection part (fire detection part) on the side where the angle between the optical axis of the light emitting element and the optical axis of the light receiving element is an acute angle, It has the least effect on the smoke detection function.

実施の形態1.
火災警報器には、発光素子及び受光素子によって煙を検出する火災警報器、受熱素子によって熱を検出する火災警報器、及び赤外線により炎を検出する火災警報器等、種々の火災警報器が存在する。以下の実施の形態では、発光素子及び受光素子によって煙を検出する火災警報器に本発明を実施した場合について説明する。
Embodiment 1 FIG.
There are various types of fire alarms such as fire alarms that detect smoke with light emitting and receiving elements, fire alarms that detect heat with heat receiving elements, and fire alarms that detect flame with infrared rays. To do. In the following embodiments, a case will be described in which the present invention is applied to a fire alarm device that detects smoke with a light emitting element and a light receiving element.

図1は本発明の実施の形態1に係る火災警報器の検煙部を示す縦断面図、図2はこの検煙部の底面図、図3はこの検煙部の右側面図、図4は図1のA−A断面図、及び図5は図1のB−B断面図である。これら図1〜図5は、縮尺を一部異ならせて示している。以下、これら図1〜図5を用いて、本実施の形態1に係る火災警報器について説明する。なお、以下の説明では、図1の上下左右方向に合わせて説明する。   1 is a longitudinal sectional view showing a smoke detector section of a fire alarm according to Embodiment 1 of the present invention, FIG. 2 is a bottom view of the smoke detector section, FIG. 3 is a right side view of the smoke detector section, FIG. 1 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 5 is a cross-sectional view taken along the line BB in FIG. These FIG. 1 to FIG. 5 show the scales partially different. Hereinafter, the fire alarm device according to the first embodiment will be described with reference to FIGS. In the following description, description will be made in accordance with the vertical and horizontal directions in FIG.

火災警報器100の検煙部1は、煙流入部10及び実装部20等から構成されている。ここで、検煙部1が、本発明の火災検出部に相当する。煙流入部10は、略円筒形状をしており、板部材11及び壁体12等から構成されている。板部材11は略円板状をしており、略中心部に開口部13が形成されている。また、板部材11の外周部には、後述する発光素子ホルダ26及び受光素子ホルダ27のそれぞれの対応する位置に凸部11a及び凸部11bが形成されている。この板部材11における下面側の周縁部には、複数の例えば略J字状の壁体12が、所定の間隔を空けて、略円環状に立設されている。これにより、煙流入部10は、上面部が板部材11によって覆われるように略円筒状に形成されている。壁体12は、煙流入部10へ外光が入射することを防止している。また、各壁体12間に形成された空間(所定の間隔)は、煙流入部10に煙が流入するための煙流入口14となっている。煙流入部10の下面側開口部は蓋体16により閉塞されており、煙流入部10内が暗箱となっている。また、煙流入部10の側面部には、煙流入口14から虫が侵入することを防止するため、防虫網(図示せず)が設けられている。   The smoke detector 1 of the fire alarm 100 is composed of a smoke inflow portion 10 and a mounting portion 20. Here, the smoke detector 1 corresponds to the fire detector of the present invention. The smoke inflow portion 10 has a substantially cylindrical shape, and includes a plate member 11 and a wall body 12. The plate member 11 has a substantially disk shape, and an opening 13 is formed at a substantially central portion. Further, on the outer peripheral portion of the plate member 11, convex portions 11 a and convex portions 11 b are formed at corresponding positions of a light emitting element holder 26 and a light receiving element holder 27 described later. A plurality of, for example, substantially J-shaped wall bodies 12 are erected in a substantially annular shape with a predetermined interval at a peripheral portion on the lower surface side of the plate member 11. Thereby, the smoke inflow part 10 is formed in a substantially cylindrical shape so that the upper surface part is covered with the plate member 11. The wall body 12 prevents external light from entering the smoke inflow portion 10. A space (predetermined interval) formed between the wall bodies 12 serves as a smoke inlet 14 for smoke to flow into the smoke inflow portion 10. The opening on the lower surface side of the smoke inflow portion 10 is closed by the lid body 16, and the inside of the smoke inflow portion 10 is a dark box. In addition, an insect net (not shown) is provided on the side surface of the smoke inflow portion 10 in order to prevent insects from entering from the smoke inlet 14.

煙流入部10の上方には、実装部20が設けられている。この実装部20は、光学台21、発光素子22、受光素子23及び遮光部材24等から構成されている。光学台21は下部が開口した略円筒形状となっており、発光素子22を収納するための発光素子ホルダ26、及び受光素子23を収納するための受光素子ホルダ27が設けられている。これら発光素子ホルダ26及び受光素子ホルダ27の外側端部は、光学台21の外周部から突出するように設けられている。煙流入部10が実装部20の下方に設けられた状態においては、暗箱となっている煙流入部10が光学台21の開口部を閉塞する。これにより、光学台21内も暗箱となっている。また、煙流入部10が実装部20の下方に設けられた状態において、煙流入部10と実装部20とは、開口部13を介して連通している。なお、本実施の形態1では、実装部20の高さ寸法が煙流入部10の高さ寸法よりも大きくなっている。   A mounting portion 20 is provided above the smoke inflow portion 10. The mounting unit 20 includes an optical bench 21, a light emitting element 22, a light receiving element 23, a light shielding member 24, and the like. The optical bench 21 has a substantially cylindrical shape with an opening at the bottom, and is provided with a light emitting element holder 26 for accommodating the light emitting element 22 and a light receiving element holder 27 for accommodating the light receiving element 23. The outer end portions of the light emitting element holder 26 and the light receiving element holder 27 are provided so as to protrude from the outer peripheral portion of the optical bench 21. In a state where the smoke inflow portion 10 is provided below the mounting portion 20, the smoke inflow portion 10 that is a dark box closes the opening of the optical bench 21. Thereby, the inside of the optical bench 21 is also a dark box. In addition, in a state where the smoke inflow portion 10 is provided below the mounting portion 20, the smoke inflow portion 10 and the mounting portion 20 communicate with each other through the opening 13. In the first embodiment, the height dimension of the mounting portion 20 is larger than the height dimension of the smoke inflow portion 10.

発光素子ホルダ26には、例えばフック等からなる一対の保持部材26aが設けられている。これら保持部材26aに挟持されて、発光素子22は発光素子ホルダ26に収納されている。このとき、発光素子22のリード部は、略直角に曲げられており、発光素子ホルダ26に形成された貫通孔26bに挿通され、光学台21の上面部から突出している。   The light emitting element holder 26 is provided with a pair of holding members 26a made of hooks, for example. The light emitting element 22 is accommodated in the light emitting element holder 26 while being held between the holding members 26 a. At this time, the lead portion of the light emitting element 22 is bent at a substantially right angle, is inserted through a through hole 26 b formed in the light emitting element holder 26, and protrudes from the upper surface portion of the optical bench 21.

受光素子23は、シールドケース28内に設けられ、このシールドケース28と共に受光素子ホルダ27に収納されている。シールドケース28は、上部及び受光素子23の受光部と対向する範囲が開口した、略角筒形状をしている。このシールドケース28には例えば押さえ片等からなる保持部材28aが設けられており、受光素子23は、シールドケース28の側面部と保持部材28aに挟持され、シールドケース28内に設けられている。シールドケース28の上部には凸部28bが形成されており、この凸部28bを回路基板2に形成された開口部に挿通させて半田付けすることによって、シールドケース28及び受光素子23は固定されている。   The light receiving element 23 is provided in the shield case 28 and is housed in the light receiving element holder 27 together with the shield case 28. The shield case 28 has a substantially rectangular tube shape with an opening in a range facing the light receiving part of the upper part and the light receiving element 23. The shield case 28 is provided with a holding member 28 a made of, for example, a pressing piece. The light receiving element 23 is sandwiched between the side surface portion of the shield case 28 and the holding member 28 a and is provided in the shield case 28. A convex portion 28b is formed on the upper portion of the shield case 28. By inserting the convex portion 28b into an opening formed in the circuit board 2 and soldering, the shield case 28 and the light receiving element 23 are fixed. ing.

発光素子22及び受光素子23が光学台21内に収納された状態において、発光素子22はその照射範囲22bが光学台21の略中心部を向くように設けられており、受光素子23はその受光範囲23bが光学台21の略中心部を向くように設けられている。また、発光素子22の光軸22aと受光素子23の光軸23aは、側面視において略平行となり、平面視において所定の角度をなすように設けられている。つまり、発光素子22の照射範囲22bと受光素子23の受光範囲23bとの重合部である煙検出部25で煙を検出する。より詳しくは、発光素子22から照射された光がこの煙検出部25に進入する煙によって散乱される光を、受光素子23は受光する。   In a state where the light emitting element 22 and the light receiving element 23 are housed in the optical bench 21, the light emitting element 22 is provided so that the irradiation range 22b faces substantially the center of the optical bench 21, and the light receiving element 23 receives the light receiving element 23. The range 23 b is provided so as to face the substantially central portion of the optical bench 21. Further, the optical axis 22a of the light emitting element 22 and the optical axis 23a of the light receiving element 23 are provided so as to be substantially parallel in a side view and at a predetermined angle in a plan view. That is, smoke is detected by the smoke detection unit 25 that is a superposition of the irradiation range 22 b of the light emitting element 22 and the light receiving range 23 b of the light receiving element 23. More specifically, the light receiving element 23 receives light scattered by the smoke that is emitted from the light emitting element 22 and enters the smoke detection unit 25.

また、発光素子22の光軸22aと受光素子23の光軸23aとのなす角度が鋭角となる側の光学台21には、遮光部材24が立設されている。この遮光部材24の平面視における断面形状は、例えば略六角形状をしており、光学台21の中心部側の角部を略コ字状に切り欠いた形状となっている。これにより、遮光部材24には、エッジ部24a及びエッジ部24bが形成されている。エッジ部24aは、発光素子22の照射した光を受光素子23が直接受光することを防止している。エッジ部24bは、エッジ部24aで乱反射した光を受光素子23が受光することを防止している。   Further, a light shielding member 24 is erected on the optical bench 21 on the side where the angle formed by the optical axis 22a of the light emitting element 22 and the optical axis 23a of the light receiving element 23 is an acute angle. The cross-sectional shape of the light shielding member 24 in a plan view is, for example, a substantially hexagonal shape, and is a shape in which a corner on the center side of the optical bench 21 is cut out in a substantially U shape. Thus, the light shielding member 24 is formed with an edge portion 24a and an edge portion 24b. The edge portion 24a prevents the light receiving element 23 from directly receiving the light emitted from the light emitting element 22. The edge portion 24b prevents the light receiving element 23 from receiving the light irregularly reflected by the edge portion 24a.

実装部20は、回路基板2の下面部に実装されている。この回路基板2には複数の電気部品(図示せず)が実装されており、これら電気部品が火災判別部3を構成する。実装部20が回路基板2に実装された状態においては、発光素子22及び受光素子23と火災判別部3は電気的に接続されている。そして、火災判別部3は、受光素子23が検出する受光量に基づいて火災が発生したか否かを判別する。受光素子23が検出する受光量は、例えば電圧等によって火災判別部3に出力される。   The mounting portion 20 is mounted on the lower surface portion of the circuit board 2. A plurality of electrical components (not shown) are mounted on the circuit board 2, and these electrical components constitute a fire determination unit 3. In a state where the mounting unit 20 is mounted on the circuit board 2, the light emitting element 22 and the light receiving element 23 and the fire determination unit 3 are electrically connected. And the fire discrimination | determination part 3 discriminate | determines whether the fire broke out based on the light reception amount which the light receiving element 23 detects. The amount of received light detected by the light receiving element 23 is output to the fire discriminating unit 3 by voltage or the like, for example.

検煙部1及び回路基板2は、煙流入部10への通気性が確保された筐体(図示せず)内に設けられ、火災警報器100を構成する。そして、この火災警報器100は、例えば家屋、ビル及びホテルの室内等の監視空間に設置される。火災警報器100が監視空間の天井面に取り付けられた状態においては、火災警報器100は、図1に示すように、煙流入部10が下側となって設置される。   The smoke detector 1 and the circuit board 2 are provided in a housing (not shown) in which air permeability to the smoke inflow portion 10 is ensured, and constitute a fire alarm 100. And this fire alarm 100 is installed in monitoring spaces, such as a house, a building, and a hotel room, for example. In a state in which the fire alarm 100 is attached to the ceiling surface of the monitoring space, the fire alarm 100 is installed with the smoke inflow portion 10 on the lower side, as shown in FIG.

火災警報器100は、例えばリチウム電池である電池30を駆動源としている。つまり、電池30は、検煙部1の発光素子22や回路基板2の火災判別部3等に電源供給する。この電池30は、発光素子22の光軸22aと受光素子23の光軸23aとのなす角度が鋭角となる側の回路基板2の側方に設けられている。また、この電池30は、実装部20の上面部と側面部の一部を切り欠くようにして設けられている。つまり、電池30を収納する電池収納部は、実装部20の上面部と側面部の一部を切り欠くようにして設けられている。実装部20の上面部と側面部の一部を切り欠くようにして電池30(電池収納部)を設けることにより、火災警報器100を小型化、薄型化することができる。なお、実装部20の切り欠かれた部分は、外光が入射するのを防止するため、閉塞されている。   The fire alarm device 100 uses, for example, a battery 30 that is a lithium battery as a drive source. That is, the battery 30 supplies power to the light emitting element 22 of the smoke detector 1, the fire determination unit 3 of the circuit board 2, and the like. The battery 30 is provided on the side of the circuit board 2 on the side where the angle formed by the optical axis 22a of the light emitting element 22 and the optical axis 23a of the light receiving element 23 is an acute angle. The battery 30 is provided so as to cut out part of the upper surface portion and the side surface portion of the mounting portion 20. That is, the battery storage part that stores the battery 30 is provided so as to cut out part of the upper surface part and the side part of the mounting part 20. By providing the battery 30 (battery storage part) so as to cut out part of the upper surface part and the side part of the mounting part 20, the fire alarm device 100 can be reduced in size and thickness. Note that the notched portion of the mounting portion 20 is closed to prevent external light from entering.

なお、電池30(電池収納部)は、必ずしも本実施の形態1に示す位置に設けられる必要はなく、実装部20の煙検出機能に支障がない部分を切り欠くようにして設けられていればよい。つまり、電池30(電池収納部)は、実装部20における発光素子22の煙検出部25までの照射範囲22b及び受光素子23の前記煙検出部25までの受光範囲23bを避けた部分を切り欠くように形成すればよい。発光素子22の光軸22aと受光素子23の光軸23aとのなす角度が鋭角となる側は、煙検出部25が遮光部材24により隔てられているので、電池30(電池収納部)を設けることによる実装部20の煙検出機能への影響が最も少ない場所である。このため、本実施の形態1では、発光素子22の光軸22aと受光素子23の光軸23aとのなす角度が鋭角となる側の実装部20の上面部と側面部の一部を切り欠くようにして、電池30(電池収納部)を設けている。   The battery 30 (battery storage part) does not necessarily have to be provided at the position shown in the first embodiment, as long as the part that does not hinder the smoke detection function of the mounting part 20 is cut out. Good. In other words, the battery 30 (battery storage unit) cuts out the portion of the mounting unit 20 that avoids the irradiation range 22b of the light emitting element 22 to the smoke detection unit 25 and the light receiving range 23b of the light receiving element 23 to the smoke detection unit 25. What is necessary is just to form. On the side where the angle formed by the optical axis 22a of the light emitting element 22 and the optical axis 23a of the light receiving element 23 is an acute angle, the smoke detection unit 25 is separated by the light shielding member 24, so a battery 30 (battery storage unit) is provided. This is the place where the influence on the smoke detection function of the mounting unit 20 is minimal. Therefore, in the first embodiment, a part of the upper surface portion and the side surface portion of the mounting portion 20 on the side where the angle formed by the optical axis 22a of the light emitting element 22 and the optical axis 23a of the light receiving element 23 is an acute angle is cut out. Thus, the battery 30 (battery storage part) is provided.

(動作説明)
続いて、本実施の形態1に係る火災警報器100の動作について説明する。
図6は、本発明の実施の形態1に係る火災警報器の検煙部を示す縦断面図である。なお、この図6は図4のC−C断面図となっており、検煙部1内の煙の流れを破線の矢印で示している。
(Description of operation)
Next, the operation of the fire alarm device 100 according to the first embodiment will be described.
FIG. 6 is a longitudinal sectional view showing the smoke detector of the fire alarm according to Embodiment 1 of the present invention. Note that FIG. 6 is a cross-sectional view taken along the line CC of FIG. 4, and the flow of smoke in the smoke detector section 1 is indicated by broken-line arrows.

火災により発生した煙は、監視空間の天井面等に沿って流れ、検煙部1の煙流入部10に流入する。このとき、遮光部材24は実装部20のみに設けられている。つまり、煙流入部10に遮光部材24が設けられていない。また、発光素子22及び受光素子23等も煙流入部10に設けられていない。したがって、遮光部材24等が煙流入部10に流入する煙の流れを遮らず、煙流入部10の煙流入特性が向上する。なお、遮光部材24は必ずしも実装部20のみに設けられている必要はなく、煙流入部10の煙流入特性が低下しない範囲において、遮光部材24の先端部が煙流入部10内に挿入されていてもよい。先端部が煙流入部10内に挿入するような長さに遮光部材24を設けることにより、発光素子22が照射する光を受光素子23が直接受光することを、より確実に防止することができる。   The smoke generated by the fire flows along the ceiling surface of the monitoring space and flows into the smoke inflow section 10 of the smoke detector section 1. At this time, the light shielding member 24 is provided only in the mounting portion 20. That is, the light shielding member 24 is not provided in the smoke inflow portion 10. Further, neither the light emitting element 22 nor the light receiving element 23 is provided in the smoke inflow portion 10. Therefore, the light shielding member 24 or the like does not block the flow of smoke flowing into the smoke inflow portion 10, and the smoke inflow characteristics of the smoke inflow portion 10 are improved. Note that the light shielding member 24 is not necessarily provided only in the mounting portion 20, and the tip portion of the light shielding member 24 is inserted into the smoke inflow portion 10 as long as the smoke inflow characteristics of the smoke inflow portion 10 do not deteriorate. May be. By providing the light shielding member 24 with such a length that the tip portion is inserted into the smoke inflow portion 10, it is possible to more reliably prevent the light receiving element 23 from directly receiving the light emitted by the light emitting element 22. .

煙は粒子の質量が小さいため慣性が小さい。よって、流動状態を変化させやすいので、煙流入部10に流入した煙は、開口部13を通って実装部20へ流入する。実装部20に煙が流入すると、この煙によって発光素子22の照射した光が散乱する。この散乱光は受光素子23によって受光される。つまり、受光素子23の受光量が変化する。そして受光素子23は、受光量に応じた検出値(電圧等)を火災判別部3に出力する。この検出値に基づいて、火災判別部3は火災が発生したか否かを判別する。火災が発生したと判断すると、火災判別部3は、LED等の発光素子やブザー等の警報装置(図示せず)によって火災が発生したことを周囲に警報する。なお、本実施の形態1では実装部20の高さ寸法が煙流入部10の高さ寸法よりも大きくなっているので、煙流入部10に流入した煙は実装部20へ流入しやすくなっている。このため、火災判別部3(火災警報器100)は、精度よく火災を判断することができる。   Smoke has low inertia because of its small particle mass. Therefore, since the flow state is easily changed, the smoke that has flowed into the smoke inflow portion 10 flows into the mounting portion 20 through the opening portion 13. When smoke flows into the mounting portion 20, the light emitted from the light emitting element 22 is scattered by the smoke. This scattered light is received by the light receiving element 23. That is, the amount of light received by the light receiving element 23 changes. The light receiving element 23 outputs a detection value (voltage or the like) corresponding to the amount of received light to the fire determination unit 3. Based on this detection value, the fire determination unit 3 determines whether or not a fire has occurred. When it is determined that a fire has occurred, the fire determination unit 3 warns the surroundings that a fire has occurred by a light emitting element such as an LED or an alarm device (not shown) such as a buzzer. In the first embodiment, since the height dimension of the mounting portion 20 is larger than the height dimension of the smoke inflow portion 10, the smoke that has flowed into the smoke inflow portion 10 easily flows into the mounting portion 20. Yes. For this reason, the fire discrimination | determination part 3 (fire alarm device 100) can judge a fire accurately.

このように構成された火災警報器100においては、実装部20における発光素子22の煙検出部25までの照射範囲22b及び受光素子23の前記煙検出部25までの受光範囲23bを避けた部分を切り欠くように電池30(電池収納部)が設けられているので、火災警報器100を小型化、薄型化することができる。   In the fire alarm device 100 configured as described above, a portion of the mounting unit 20 that avoids the irradiation range 22b to the smoke detection unit 25 of the light emitting element 22 and the light reception range 23b to the smoke detection unit 25 of the light receiving element 23 is avoided. Since the battery 30 (battery storage part) is provided so as to be cut out, the fire alarm device 100 can be reduced in size and thickness.

また、発光素子22の光軸22aと受光素子23の光軸23aとのなす角度が鋭角となる側の実装部20の上面部と側面部の一部を切り欠くようにして電池30(電池収納部)が設けられているので、電池30(電池収納部)を設けることによる実装部20の煙検出機能への影響が少ない。   Further, the battery 30 (battery storage) is formed by cutting out a part of the upper surface portion and the side surface portion of the mounting portion 20 on the side where the angle formed by the optical axis 22a of the light emitting element 22 and the optical axis 23a of the light receiving element 23 is an acute angle. Part) is provided, the installation of the battery 30 (battery storage part) has little influence on the smoke detection function of the mounting part 20.

なお、本実施の形態1に係る検煙部1では、実装部20が上側となるように、実装部20と煙流入部10とを重ねて配置した。これに限らず、煙流入部10が上側となるように実装部20と煙流入部10とを重ねて配置し、検煙部1を構成してもよい。実装部20を上側にすることにより、実装部20を回路基板2側にして、検煙部1を回路基板2に実装することができる。このため、実装部20の受光素子23と回路基板2の火災判別部3との接続が容易となる。したがって、本実施の形態1に係る検煙部1では、実装部20が上側となるように、実装部20と煙流入部10とを重ねて配置している。   Note that, in the smoke detector section 1 according to the first embodiment, the mounting section 20 and the smoke inflow section 10 are arranged so that the mounting section 20 is on the upper side. Not only this but the mounting part 20 and the smoke inflow part 10 may be piled up so that the smoke inflow part 10 may become the upper side, and the smoke detection part 1 may be comprised. By placing the mounting part 20 on the upper side, the smoke detecting part 1 can be mounted on the circuit board 2 with the mounting part 20 on the circuit board 2 side. For this reason, the connection between the light receiving element 23 of the mounting unit 20 and the fire determination unit 3 of the circuit board 2 is facilitated. Therefore, in the smoke detector section 1 according to the first embodiment, the mounting section 20 and the smoke inflow section 10 are arranged so that the mounting section 20 is on the upper side.

また、本実施の形態1に係る火災警報器100は煙流入部10と実装部20を分けて検煙部1を構成したが、煙流入部内に発光素子22及び受光素子23が設けられた検煙部を有する火災報知器に本発明を実施してもよい。また、散乱光式の火災警報器に限らず、減光式の火災警報器に本発明を実施してもよい。   In addition, the fire alarm 100 according to the first embodiment has configured the smoke detector 1 by dividing the smoke inflow portion 10 and the mounting portion 20, but the detection is provided with the light emitting element 22 and the light receiving element 23 in the smoke inflow portion. You may implement this invention to the fire alarm which has a smoke part. Moreover, you may implement this invention not only to a scattered light type fire alarm but to a dimming type fire alarm.

実施の形態2.
また、煙を検出する火災警報器に限らず、他の火災警報器に本発明を実施してもよい。
図7は、本発明の実施の形態2に係る火災警報器の別の一例を示す縦断面図である。この図7は、受熱素子によって火災による熱を検出する熱式火災警報器を示している。
Embodiment 2. FIG.
Moreover, you may implement this invention not only to the fire alarm which detects smoke but to other fire alarms.
FIG. 7 is a longitudinal sectional view showing another example of the fire alarm according to Embodiment 2 of the present invention. FIG. 7 shows a thermal fire alarm that detects heat from a fire by means of a heat receiving element.

熱式火災警報器200の筐体201は、略円筒状をしている。この筐体201の下部には、火災検出部210が設けられている。この火災検出部210は、プロテクタ211及び受熱素子212等から構成されている。プロテクタ211は、下側から上側にかけて拡開する略円筒形状となっている。プロテクタ211は、受熱素子212が外力を受けないように保護するものであり、上面部が筐体201の下面部に接するように設けられている。例えばサーミスタ等の受熱素子212は、プロテクタ211の内部に設けられている。この受熱素子212は、配線部213を介して、筐体201内に設けられた回路基板214に接続されている。この回路基板214には複数の電気部品(図示せず)が実装されており、これら電気部品が火災判別部215を構成する。受熱素子212は、この火災判別部215と接続されている。   The housing 201 of the thermal fire alarm 200 has a substantially cylindrical shape. A fire detection unit 210 is provided at the bottom of the housing 201. The fire detection unit 210 includes a protector 211, a heat receiving element 212, and the like. The protector 211 has a substantially cylindrical shape that expands from the lower side to the upper side. The protector 211 protects the heat receiving element 212 from receiving an external force, and is provided so that the upper surface portion is in contact with the lower surface portion of the housing 201. For example, a heat receiving element 212 such as a thermistor is provided inside the protector 211. The heat receiving element 212 is connected to a circuit board 214 provided in the housing 201 via a wiring part 213. A plurality of electrical components (not shown) are mounted on the circuit board 214, and these electrical components constitute a fire determination unit 215. The heat receiving element 212 is connected to the fire determination unit 215.

この熱式火災警報器200は、例えばリチウム電池である電池230を駆動源としている。つまり、電池230は、回路基板214の火災判別部215等に電源供給する。この電池30は、回路基板214の側方に設けられている。また、この電池230は、火災検出部210の一部を切り欠くようにして設けられている。つまり、電池230を収納する電池収納部は、火災検出部210の一部を切り欠くようにして設けられている。火災検出部210の一部を切り欠くようにして電池230(電池収納部)を設けることにより、熱式火災警報器200を小型化、薄型化することができる。なお、火災検出部210の切り欠かれた部分には、筐体201の凸部201aが挿入されている。これにより、火災検出部210の容積が小さくなっている。   The thermal fire alarm 200 uses a battery 230, which is a lithium battery, for example, as a drive source. That is, the battery 230 supplies power to the fire determination unit 215 and the like of the circuit board 214. The battery 30 is provided on the side of the circuit board 214. The battery 230 is provided so as to cut out a part of the fire detection unit 210. That is, the battery storage unit that stores the battery 230 is provided so as to cut out a part of the fire detection unit 210. By providing the battery 230 (battery storage unit) so as to cut out a part of the fire detection unit 210, the thermal fire alarm device 200 can be reduced in size and thickness. In addition, the convex part 201a of the housing | casing 201 is inserted in the notched part of the fire detection part 210. FIG. Thereby, the volume of the fire detection part 210 is small.

なお、電池230(電池収納部)は、必ずしも本実施の形態2に示す位置に設けられる必要はなく、火災検出部210の熱検出機能に支障がない部分を切り欠くようにして形成してもよい。   The battery 230 (battery storage part) is not necessarily provided at the position shown in the second embodiment, and may be formed by cutting out a part that does not hinder the heat detection function of the fire detection part 210. Good.

本発明の実施の形態1に係る火災警報器の検煙部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the smoke detection part of the fire alarm which concerns on Embodiment 1 of this invention. 本発明の実施の形態1に係る火災警報器の検煙部を示す底面図である。It is a bottom view which shows the smoke detection part of the fire alarm which concerns on Embodiment 1 of this invention. 本発明の実施の形態1に係る火災警報器の検煙部を示す右側面図である。It is a right view which shows the smoke detection part of the fire alarm which concerns on Embodiment 1 of this invention. 図1のA−A断面図である。It is AA sectional drawing of FIG. 図1のB−B断面図である。It is BB sectional drawing of FIG. 本発明の実施の形態1に係る火災警報器の検煙部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the smoke detection part of the fire alarm which concerns on Embodiment 1 of this invention. 実施の形態2に係る火災警報器の別の一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows another example of the fire alarm device which concerns on Embodiment 2. FIG.

符号の説明Explanation of symbols

1 検煙部、2 回路基板、3 火災判別部、10 煙流入部、11 板部材、11a 凸部、11b 凸部、12 壁体、13 開口部、14 煙流入口、16 蓋体、20 実装部、21 光学台、22 発光素子、22a 光軸、22b 照射範囲、23 受光素子、23a 光軸、23b 照射範囲、24 遮光部材、24a エッジ部、24b エッジ部、25 煙検出部、26 発光素子ホルダ、26a 保持部材、26b 貫通孔、27 受光素子ホルダ、28 シールドケース、28a 保持部材、28b 凸部、30 電池、100 火災警報器、200 熱式火災警報器、201 筐体、210 火災検出部、211 プロテクタ、211a 凸部、212 受熱素子、213 配線部、214 回路基板、215 火災判別部、230 電池。   DESCRIPTION OF SYMBOLS 1 Smoke detection part, 2 circuit board, 3 fire discrimination part, 10 smoke inflow part, 11 board member, 11a convex part, 11b convex part, 12 wall body, 13 opening part, 14 smoke inflow port, 16 lid body, 20 mounting Part, 21 optical bench, 22 light emitting element, 22a optical axis, 22b irradiation range, 23 light receiving element, 23a optical axis, 23b irradiation range, 24 light shielding member, 24a edge part, 24b edge part, 25 smoke detection part, 26 light emitting element Holder, 26a Holding member, 26b Through hole, 27 Light receiving element holder, 28 Shield case, 28a Holding member, 28b Convex part, 30 Battery, 100 Fire alarm, 200 Thermal fire alarm, 201 Housing, 210 Fire detection part , 211 protector, 211a convex part, 212 heat receiving element, 213 wiring part, 214 circuit board, 215 fire discrimination part, 230 battery.

Claims (3)

火災検出部である検煙部と、該検煙部の出力信号に基づいて火災を判断する火災判別部と、前記火災判別部に電源供給するための電池を収納する電池収納部と、を有し、前記火災判別部が火災と判断すると火災警報を出力する火災警報器において、
前記検煙部は、
該検煙部に外光が入射することを防止する壁体と、
該検煙部の内部に光を照射する発光素子と、
該発光素子から照射され、前記検煙部の煙粒子により生じる散乱光を受光する受光素子と、
前記発光素子の照射範囲と前記受光素子の受光範囲との重合部である煙検出部と、
を備え、
前記電池収納部は、前記検煙部における検出機能に支障がない部分を切り欠くようにして形成されていることを特徴とする火災警報器。
Yes and smoke detection portion is a fire detector, a fire determination section for determining a fire on the basis of the output signal of the smoke detection portion, and a battery accommodating portion for accommodating a battery for supplying power to the fire discriminating section, a In the fire alarm that outputs a fire alarm when the fire discriminating unit determines that there is a fire,
The smoke detector
A wall for preventing external light from entering the smoke detector;
A light emitting element for irradiating light inside the smoke detector;
A light receiving element that receives the scattered light emitted from the smoke detector and emitted by smoke particles of the smoke detector;
A smoke detector that is a superposition of the irradiation range of the light emitting element and the light receiving range of the light receiving element;
With
The battery housing unit, fire alarm, characterized in that it is formed so as to cut out portions do not hinder the smoke detecting function of the smoke detection portion.
記電池収納部は、
前記検煙部における、前記発光素子の前記煙検出部までの照射範囲及び前記受光素子の前記煙検出部までの受光範囲を避けた部分を切り欠くようにして形成されていることを特徴とする請求項1に記載の火災警報器。
Before Symbol battery compartment,
In the smoke detector, the light emitting element is formed so as to cut out a portion of the light emitting element that avoids an irradiation range to the smoke detecting part and a light receiving range of the light receiving element to the smoke detecting part. The fire alarm according to claim 1 .
前記電池収納部は、
前記発光素子の光軸と前記受光素子の光軸とのなす角度が鋭角となる側の前記検煙部を切り欠くようにして形成されていることを特徴とする請求項2に記載の火災警報器。
The battery compartment is
3. The fire alarm according to claim 2, wherein the smoke detection unit is formed by cutting out the smoke detecting portion on the side where the angle formed by the optical axis of the light emitting element and the optical axis of the light receiving element is an acute angle. vessel.
JP2008256011A 2008-10-01 2008-10-01 Fire alarm Active JP4999812B2 (en)

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