JP3966469B2 - Fire detector - Google Patents

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JP3966469B2
JP3966469B2 JP2003064055A JP2003064055A JP3966469B2 JP 3966469 B2 JP3966469 B2 JP 3966469B2 JP 2003064055 A JP2003064055 A JP 2003064055A JP 2003064055 A JP2003064055 A JP 2003064055A JP 3966469 B2 JP3966469 B2 JP 3966469B2
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thin plate
plate member
fire detector
reinforcing
main body
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JP2004272702A (en
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功 浅野
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Hochiki Corp
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Hochiki Corp
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Description

【0001】
【発明が属する技術分野】
本発明は、外側に感熱面を有する板状部材の内側に温度検出手段が配置されている火災感知器に関し、特には、火災感知器全体の薄型化を図りつつ、板状部材の破損を抑制することができる火災感知器に関する。
【0002】
【従来の技術】
従来、外側に感熱面を有する板状部材と、その板状部材の内側に配置された温度検出手段とを具備する火災感知器が知られている。この種の火災感知器の例としては、例えば特開2002−63665号公報に記載されたものがある。特開2002−63665号公報に記載された火災感知器では、外側に感熱面を有する板状部材として基板が用いられており、その板状部材の内側に配置された温度検出手段として温接点検出素子と冷接点検出素子とが用いられている。また、特開2002−63665号公報に記載された火災感知器では、板状部材としての基板の厚みが薄くされている。そのため、火災感知器全体が薄型化せしめられている。更に、温度検出手段としての温接点検出素子および冷接点検出素子の温度変化が迅速化せしめられており、それにより、火災感知器の応答速度が迅速化せしめられている。
【0003】
ところが、特開2002−63665号公報に記載された火災感知器では、上述したように板状部材の薄型化が図られているものの、板状部材が補強されていないため、例えば火災感知器の取付け時などに板状部材が破損してしまうおそれがある。また、仮に板状部材の外側に補強手段を配置した場合には、板状部材よりも外側に突出した補強手段の分だけ火災感知器全体の厚みが増してしまい、火災感知器全体の薄型化の要求に反してしまう。
【0004】
【特許文献1】
特開2002−63665号公報
【0005】
【発明が解決しようとする課題】
前記問題点に鑑み、本発明は、火災感知器全体の薄型化を図りつつ、板状部材の破損を抑制することができる火災感知器を提供することを目的とする。
【0006】
【課題を解決するための手段】
請求項1に記載の発明によれば、外側に感熱面を有する板状部材と、前記板状部材の内側に配置された温度検出手段とを具備する火災感知器において、前記板状部材の内側に配置された前記温度検出手段の周囲を囲んで空間を形成する環状部分を備え、前記空間が密閉されるように前記板状部材の内側且つ前記環状部分の外側周囲にポッティング剤を充填して前記板状部材を補強する補強手段を設けたことを特徴とする火災感知器が提供される。
【0007】
請求項1に記載の火災感知器では、板状部材を補強するための補強手段が板状部材の内側に配置されている。つまり、板状部材を補強するための補強手段が設けられている。そのため、板状部材の破損を抑制することができる。更に、その補強手段が板状部材の内側に配置されている。そのため、板状部材の外側に補強手段が配置される場合のように、板状部材よりも外側に突出した補強手段の分だけ火災感知器全体の厚みが増してしまうのを回避することができる。すなわち、火災感知器全体の薄型化を図りつつ、板状部材の破損を抑制することができる。
また、板状部材の内側に充填されたポッティング剤により板状部材が補強される。詳細には、温度検出手段が配置された空間がポッティング剤によって密閉されるようにポッティング剤が充填されている。そのため、ポッティング剤により、板状部材の破損を抑制しつつ、火災感知器が天井に取付けられた時の天井からの漏水などから温度検出手段を保護することができる。つまり、板状部材の補強手段とは別個に温度検出手段の保護手段を設ける必要性を排除することができる。
【0017】
【発明の実施の形態】
以下、添付図面を用いて本発明の実施形態について説明する。
【0018】
図1は例えば天井に取付けられる本発明の第1の実施形態の火災感知器を床側から見た図、図2は図1に示した火災感知器を水平方向から見た図、図3は図1に示した火災感知器のA−A断面図、図4は図1に示した火災感知器を天井側から見た図である。図1〜図4において、1は外側(床側)に感熱面1aを有する薄板部材である。この薄板部材1は、熱拡散率が比較的小さい材質により形成されている。2は薄板部材1の内側に配置された温度検出素子、3は薄板部材1を補強するために薄板部材1の内側に配置された補強部材である。4は例えば天井に取付けられる本体部分、5は薄板部材1の内側に配置されたフレキシブル基板である。詳細には、温度検出素子2はフレキシブル基板5上に配置されている。6は本体部分4に取付けられたプリント基板、7は一端がプリント基板6に接続されているリード線、8は温度検出素子2、フレキシブル基板5、プリント基板6等を天井からの漏水から保護するための裏蓋である。9は本体部分4と裏蓋8との間、およびリード線7と裏蓋8との間をシールするためのポッティング剤、10は例えば天井に取付けられた本体部分4を覆うためのカバー10である。
【0019】
図1〜図4に示すように、第1の実施形態の火災感知器では、火災感知器全体の薄型化を図るために、板厚の薄い薄板部材を用いた感熱部とし、また、温度検出素子2を配置するための、厚みが薄いフレキシブル基板5が用いられている。
【0020】
図3に詳細に示すように、第1の実施形態の火災感知器では、温度検出素子2を備えたフレキシブル基板5が、薄板部材1の裏側に接着されるとともに、フレキシブル基板5は、半田付けによってプリント基板6に接続されている。
【0021】
第1の実施形態の火災感知器では、単一の温度検出素子2が設けられているが、図示しない第1の実施形態の変形例では、代わりに、蓄熱部を備える低温集熱部と、その低温集熱部よりも早く温度上昇する蓄熱部を備えない高温集熱部とを設け、低温集熱部の温度を検出するための低温用温度検出素子と、高温集熱部の温度を検出するための高温用温度検出素子とを設けた両者の温度差から温度上昇率を判断する温度検出器であっても良い。
【0022】
図5は図3に示した補強部材を天井側(図3の上側)から見た図、図6は図5に示した補強部材を床側(図3の下側)から見た図、図7は図5に示した補強部材のA−A断面図である。図5〜図7において、3aは環状部分、3bは環状部分3aからその中心側かつ床側(図7の左側)に突出している突出部分、3cは薄板部材1を補強するために突出部分3bに形成された補強面である。
【0023】
図1〜図7に示すように、第1の実施形態の火災感知器では、例えば火災感知器の取付け時などに薄板部材1が破損してしまうのを抑制するために、薄板部材1を補強するための補強部材3が設けられている。更に、その補強部材3が薄板部材1の内側(天井側)に配置されている。そのため、薄板部材の外側(床側)に補強部材が配置される場合(図示せず)のように、薄板部材よりも外側(床側)に突出した補強部材の分だけ火災感知器全体の厚みが増してしまうのを回避することができる。
【0024】
詳細には、図5〜図7に示すように、第1の実施形態の火災感知器では、補強部材3の一部が環状部分3aによって構成され、その環状部分3aから突出している突出部分3bによって薄板部材1が補強される。なお、補強部材3が環状になって構成されるため、補強部材が非環状である場合よりも、ねじり等に耐性を有する。そのため、例えば非環状部分から突出している突出部分によって板状部材が補強される場合(図示せず)よりも、強い力に抗することができる。第1の実施形態では、環状部分3aが円形に形成されているが、図示しない第1の実施形態の変形例では、代わりに、環状部分を例えば楕円形、矩形などの非円形の環状に形成することも可能である。
【0025】
詳細には、図3に示すように、第1の実施形態の火災感知器では、組み立てられた火災感知器内で補強部材3ががたつくのを抑制するために、補強部材3が本体部分4に対して圧入されるように構成されている。即ち、補強部材3の一部に切欠き構造部3dを形成することにより、本体部分4への挿入を容易せしめるように構成する。さらに、切欠き構造部3dは、本体4に設けられた係止構造11と係合して、補強部材3が外力によって天井方向に押し下げられることを防止する。
【0026】
よって、本体4へ挿入された補強部材3は、補強部材3の外壁面と本体4の内壁面に当接し、変形が抑制されるとともに、補強部材3の切欠き構造部3dと本体4の係止構造部11が係合することによって、外力に対して天井方向に移動することができないので、薄板部材1の裏側から薄板部材1が破損することを防止することができる。
【0027】
第1の実施形態の火災感知器では、薄板部材1とフレキシブル基板5とが例えば両面テープにより接合される。次いで、その薄板部材1が本体部分4に対して例えば超音波溶着により接合される。詳細には、超音波溶着を容易にするために、熱変形温度が近い材質、好ましくは、同一の材質によって、薄板部材1と本体部分4とが形成されている。
【0028】
第1の実施形態の火災感知器では、薄板部材1と本体部分4との間を介して異物が侵入しないように、本体部分4の床側(図3の下側)端面から天井側(図3の上側)に少し窪んだ部分に、薄板部材1が取付けられている。この窪んだ部分は、本体部分4に対する薄板部材1の位置決めにも用いられる。
【0029】
第1の実施形態の火災感知器では、本体部分4が薄板部材1の感熱面1aよりも床側(図3の下側)に突出しているのに伴って、水平方向(図3の左右および/または表裏方向)の気流に対する熱応答性が低下してしまうのを抑制するために、薄板部材1の感熱面1aに対する本体部分4の床側(図3の下側)への突出量が1mm以下に設定されている。好ましくは、薄板部材1の感熱面1aに対する本体部分4の床側(図3の下側)への突出量がほぼ0mmに設定されている。つまり、本体部分4に薄板部材1を取付けるために本体部分4に形成された窪みの深さが、薄板部材1の厚さとほぼ同一またはそれ以下に設定されている。
【0030】
また、上述したように、第1の実施形態の火災感知器では、本体部分4に対して薄板部材1を位置決めするために本体部分4の全周にわたり窪みが形成されているが、代わりに、本体部分の床側端面のうち、薄板部材の外周部が位置する部分に少なくとも3個以上の突起を形成し、それらの突起により、本体部分に対する薄板部材の位置決めを行うことも可能である。
【0031】
また、第1の実施形態によれば、図5〜図7に示したように、補強部材3の一部として環状部分3aが設けられ、その環状部分3aから突出している突出部分3bに形成された補強面3cによって薄板部材1が補強される。そのため、例えば非環状部分から突出している突出部分によって板状部材が補強される場合(図示せず)よりも、強い力に抗することができる。
【0032】
以下、本発明の火災感知器の第2の実施形態について説明する。図8は例えば天井に取付けられる本発明の第2の実施形態の火災感知器の本体部分を床側から見た図、図9は図8に示した火災感知器の本体部分のB−B断面図である。図10は図8に示した火災感知器の本体部分のC−C断面図、図11は図8に示した火災感知器の本体部分を天井側から見た図である。なお、図8においては、薄板部材101を取り除いた状態の火災感知器の状態を表している。
【0033】
図8〜図11において、101は外側(床側)に感熱面101aを有する薄板部材である。この薄板部材101は、熱拡散率が比較的小さい材質により形成されている。また、この薄板部材101はプリント基板としての機能も有する。102は薄板部材101の内側に配置された温度検出素子である。この温度検出素子102は、薄板部材101上に、つまり、プリント基板上に配置されている。従って、薄板部材101の温度変化を温度検出素子102により、電気信号へと変換できる。110は例えば天井に取付けられる火災感知器の本体部分、103は本体部分110の一部を構成する環状部分である。この環状部分103は薄板部材101を補強するために薄板部材101の内側に配置される。つまり、本体部分110、詳細には、環状部分103は、薄板部材101を補強する補強手段としての機能を有する。103cは薄板部材101を補強するために環状部分103に形成された端面、110cは薄板部材101を本体部分110に取付けるために本体部分110に形成された取付け面である。
【0034】
図8〜図11に示すように、第2の実施形態の火災感知器では、火災感知器全体の薄型化を図るために、薄板部材101の厚みを薄くして感熱部の厚みを抑え、また、温度検出素子102を配置するためのプリント基板が薄板部材101と兼用されている。
【0035】
詳細には、図8に示すように、第2の実施形態の火災感知器では、本体部分110の一部が環状部分103として環状に形成され、その環状部分103の端面103cによって薄板部材101が補強される。そのため、例えば非環状部分の端面によって板状部材が補強される場合(図示せず)よりも、強い力に抗することができる。第2の実施形態では、環状部分103が楕円形に形成されているが、代わりに、環状部分を例えば円形、矩形などの非楕円形の環状に形成することも可能である。
【0036】
第2の実施形態によれば、図9に示したように、薄板部材101を補強するための補強手段としての環状部分103が薄板部材101の内側(図の上側)に配置されている。つまり、薄板部材101を補強するための補強手段としての環状部分103が設けられている。そのため、薄板部材101の破損を抑制することができる。更に、その補強手段としての環状部分103が薄板部材101の内側に配置されている。そのため、薄板部材の外側に補強手段が配置される場合(図示せず)のように、薄板部材よりも外側に突出した補強手段の分だけ火災感知器全体の厚みが増してしまうのを回避することができる。すなわち、火災感知器全体の薄型化を図りつつ、薄板部材101の破損を抑制することができる。
【0037】
また、図8〜図11において、105は環状部103と本体部分110の間に充填された補強部材としてのポッティング剤である。即ち、図9に示すように、ポッティング剤105により、薄板部材101が破損するのを防止する。また、ポッティング剤105は、温度検出素子102が収容された空間へ天井からの漏水が侵入することを防止する。更に、ポッティング剤105により、薄板部材101と環状部分103との間、並びに、薄板部材101とカバー110との間を介して異物が侵入するのが阻止される。つまり、ポッティング剤105を充填することにより、ポッティング剤105が薄板部材101とカバー110、薄板部材101と環状部103をそれぞれ接合し、温度検出素子102が配置された空間を密閉する。
【0038】
一方、環状部分103と薄板部材で囲われる部分にポッティング剤105が充填されることはないので、温度検出素子102は薄板部材101の温度変化を遅延なく検出できる。
【0039】
図12は例えば天井に取付けられる本発明の第3の実施形態の火災感知器の断面図である。第3の実施形態の火災感知器は、第2の実施形態の変形であり、温度を検出する2つの温度検出素子202a,202bがプリント基板としての薄板部材201上に形成されている。
【0040】
第3の実施形態の火災感知器では、低温用温度検出素子202aと、高温用温度検出素子202bとが設けられている。一方、代わりに、上述した第1および第2の実施形態と同様に単一の温度検出素子を設けることも可能である。
【0041】
第3の実施形態によれば、第2の実施形態と同様に、薄板部材201を補強するための補強手段としてのポッティング剤209が薄板部材201の内側(図1の下側)に配置されている。つまり、薄板部材201を補強するための補強手段としてのポッティング剤209が設けられている。
【0042】
さらに、薄板部材201の破損を抑制しつつ、火災感知器が天井に取付けられた時の天井からの漏水などから温度検出素子202a,202bを保護する防水機能も兼ね備えている。
【0043】
また、第2の実施形態と同様に、ポッティング剤209により薄板部材201がカバー210に取付けられる。そのため、ポッティング剤209により、薄板部材201の破損を抑制しつつ、薄板部材201とカバー210の接着機能もはたしている。つまり、薄板部材201の補強手段とは別個に薄板部材201をカバー210に取付けるためにネジ等により固定する必要性を排除することができる。
【0044】
また、上述した第1から第3の実施形態およびそれらの変形例の火災感知器の構成を適宜組み合わせることも可能である。
【0045】
【発明の効果】
請求項1に記載の発明によれば、板状部材の破損を抑制することができる。更に、板状部材の外側に補強手段が配置される場合のように、板状部材よりも外側に突出した補強手段の分だけ火災感知器全体の厚みが増してしまうのを回避することができる。また、ポッティング剤により、板状部材の破損を抑制しつつ、火災感知器が天井に取付けられた時の天井からの漏水などから温度検出手段を保護することができる。つまり、板状部材の補強手段とは別個に温度検出手段の保護手段を設ける必要性を排除することができる。
【図面の簡単な説明】
【図1】例えば天井に取付けられる本発明の第1の実施形態の火災感知器を床側から見た図である。
【図2】図1に示した火災感知器を水平方向から見た図である。
【図3】図1に示した火災感知器のA−A断面図である。
【図4】図1に示した火災感知器を天井側から見た図である。
【図5】図3に示した補強部材を天井側(図3の上側)から見た図である。
【図6】図5に示した補強部材を床側(図3の下側)から見た図である。
【図7】図5に示した補強部材のA−A断面図である。
【図8】例えば天井に取付けられる本発明の第2の実施形態の火災感知器の本体部分を床側から見た図である。
【図9】図8に示した火災感知器の本体部分のB−B断面図である。
【図10】図8に示した火災感知器の本体部分のC−C断面図である。
【図11】図8に示した火災感知器の本体部分を天井側から見た図である。
【図12】例えば天井に取付けられる本発明の第3の実施形態の火災感知器の断面図である。
【符号の説明】
1 薄板部材
1a 感熱面
2 温度検出素子
3 補強部材
[0001]
[Technical field to which the invention belongs]
The present invention relates to a fire detector in which a temperature detection means is arranged inside a plate-like member having a heat-sensitive surface on the outside, and in particular, suppresses damage to the plate-like member while reducing the thickness of the entire fire detector. It can be related to fire detectors.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a fire detector including a plate-like member having a heat-sensitive surface on the outside and temperature detecting means disposed on the inside of the plate-like member. An example of this type of fire detector is described in, for example, Japanese Patent Application Laid-Open No. 2002-63665. In the fire detector described in Japanese Patent Laid-Open No. 2002-63665, a substrate is used as a plate-like member having a heat-sensitive surface on the outside, and a hot junction detection is performed as a temperature detection means disposed inside the plate-like member. An element and a cold junction detection element are used. Further, in the fire detector described in Japanese Patent Laid-Open No. 2002-63665, the thickness of the substrate as the plate member is reduced. Therefore, the entire fire detector is made thinner. Furthermore, the temperature change of the hot junction detection element and the cold junction detection element as the temperature detection means is speeded up, thereby speeding up the response speed of the fire detector.
[0003]
However, in the fire detector described in Japanese Patent Laid-Open No. 2002-63665, although the plate-like member is thinned as described above, the plate-like member is not reinforced. There is a possibility that the plate-shaped member may be damaged during the mounting. Also, if the reinforcing means is disposed outside the plate-like member, the thickness of the entire fire detector increases by the amount of the reinforcing means protruding outward from the plate-like member, and the overall thickness of the fire detector is reduced. Contrary to the request.
[0004]
[Patent Document 1]
JP 2002-63665 A
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide a fire detector capable of suppressing breakage of a plate-like member while reducing the thickness of the entire fire detector.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, in the fire detector comprising a plate-like member having a heat-sensitive surface on the outside and a temperature detecting means disposed on the inside of the plate-like member, the inside of the plate-like member. An annular portion that surrounds the periphery of the temperature detecting means disposed in the space and forms a space, and a potting agent is filled inside the plate-like member and outside the annular portion so that the space is sealed. There is provided a fire detector provided with reinforcing means for reinforcing the plate-like member.
[0007]
In the fire detector according to the first aspect, the reinforcing means for reinforcing the plate-like member is disposed inside the plate-like member. That is, a reinforcing means for reinforcing the plate-like member is provided. Therefore, damage to the plate member can be suppressed. Further, the reinforcing means is disposed inside the plate member. Therefore, it is possible to avoid an increase in the thickness of the entire fire detector by the amount of the reinforcing means protruding outward from the plate-like member as in the case where the reinforcing means is arranged outside the plate-like member. . That is, it is possible to prevent the plate member from being damaged while reducing the thickness of the entire fire detector.
Further, the plate member is reinforced by the potting agent filled inside the plate member. Specifically, the potting agent is filled so that the space in which the temperature detecting means is disposed is sealed with the potting agent. For this reason, the potting agent can protect the temperature detection means from leakage from the ceiling when the fire sensor is attached to the ceiling, while suppressing damage to the plate-like member. That is, it is possible to eliminate the necessity of providing a protection means for the temperature detection means separately from the reinforcement means for the plate-like member.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0018]
FIG. 1 is a view of a fire sensor according to a first embodiment of the present invention attached to a ceiling, for example, as viewed from the floor side, FIG. 2 is a view of the fire sensor shown in FIG. AA sectional view of the fire detector shown in FIG. 1, FIG. 4 is a view of the fire detector shown in FIG. 1 as viewed from the ceiling side. 1 to 4, reference numeral 1 denotes a thin plate member having a heat-sensitive surface 1a on the outside (floor side). The thin plate member 1 is made of a material having a relatively low thermal diffusivity. Reference numeral 2 denotes a temperature detecting element arranged inside the thin plate member 1, and 3 denotes a reinforcing member arranged inside the thin plate member 1 in order to reinforce the thin plate member 1. For example, 4 is a main body part attached to the ceiling, and 5 is a flexible substrate disposed inside the thin plate member 1. Specifically, the temperature detection element 2 is disposed on the flexible substrate 5. Reference numeral 6 denotes a printed circuit board attached to the main body 4, 7 denotes a lead wire having one end connected to the printed circuit board 6, and 8 protects the temperature detection element 2, the flexible substrate 5, the printed circuit board 6, and the like from leakage from the ceiling. It is a back cover for. 9 is a potting agent for sealing between the main body part 4 and the back cover 8 and between the lead wire 7 and the back cover 8, and 10 is a cover 10 for covering the main body part 4 attached to the ceiling, for example. is there.
[0019]
As shown in FIGS. 1 to 4, in the fire detector of the first embodiment, in order to reduce the thickness of the entire fire detector, a heat sensitive part using a thin plate member having a thin plate thickness is used, and temperature detection is performed. A flexible substrate 5 having a small thickness for placing the element 2 is used.
[0020]
As shown in detail in FIG. 3, in the fire detector of the first embodiment, the flexible substrate 5 provided with the temperature detection element 2 is bonded to the back side of the thin plate member 1, and the flexible substrate 5 is soldered. To the printed circuit board 6.
[0021]
In the fire detector of the first embodiment, a single temperature detection element 2 is provided, but in a modification of the first embodiment (not shown), instead, a low-temperature heat collection unit including a heat storage unit, A high-temperature heat collecting part that does not have a heat storage part that rises faster than the low-temperature heat collecting part is provided, and a low-temperature temperature detecting element for detecting the temperature of the low-temperature heat collecting part and the temperature of the high-temperature heat collecting part are detected. The temperature detector which judges the temperature increase rate from the temperature difference of both provided the temperature detection element for high temperature for doing may be used.
[0022]
5 is a view of the reinforcing member shown in FIG. 3 viewed from the ceiling side (upper side of FIG. 3), and FIG. 6 is a view of the reinforcing member shown in FIG. 5 viewed from the floor side (lower side of FIG. 3). 7 is an AA cross-sectional view of the reinforcing member shown in FIG. 5 to 7, 3 a is an annular portion, 3 b is a protruding portion protruding from the annular portion 3 a toward the center side and the floor side (left side in FIG. 7), and 3 c is a protruding portion 3 b for reinforcing the thin plate member 1. It is the reinforcement surface formed in this.
[0023]
As shown in FIGS. 1 to 7, in the fire detector according to the first embodiment, the thin plate member 1 is reinforced in order to prevent the thin plate member 1 from being damaged, for example, when the fire detector is attached. A reinforcing member 3 is provided. Further, the reinforcing member 3 is disposed on the inner side (ceiling side) of the thin plate member 1. Therefore, as in the case where the reinforcing member is disposed on the outer side (floor side) of the thin plate member (not shown), the thickness of the entire fire detector is equivalent to the reinforcing member protruding outward (floor side) from the thin plate member. Can be avoided.
[0024]
Specifically, as shown in FIGS. 5 to 7, in the fire detector according to the first embodiment, a part of the reinforcing member 3 is constituted by an annular portion 3 a and a protruding portion 3 b protruding from the annular portion 3 a. Thus, the thin plate member 1 is reinforced. In addition, since the reinforcing member 3 is configured in an annular shape, the reinforcing member 3 is more resistant to torsion than the case where the reinforcing member is non-annular. Therefore, for example, a stronger force can be resisted than when the plate-like member is reinforced by the protruding portion protruding from the non-annular portion (not shown). In the first embodiment, the annular portion 3a is formed in a circular shape. However, in a modified example of the first embodiment (not shown), the annular portion is formed in a non-circular annular shape such as an ellipse or a rectangle instead. It is also possible to do.
[0025]
Specifically, as shown in FIG. 3, in the fire detector according to the first embodiment, the reinforcing member 3 is attached to the main body portion 4 in order to prevent the reinforcing member 3 from rattling in the assembled fire detector. It is comprised so that it may press-fit with respect. That is, the cutout structure 3d is formed in a part of the reinforcing member 3 so that the insertion into the main body 4 is facilitated. Further, the notch structure portion 3d engages with the locking structure 11 provided in the main body 4 to prevent the reinforcing member 3 from being pushed down in the ceiling direction by an external force.
[0026]
Therefore, the reinforcing member 3 inserted into the main body 4 comes into contact with the outer wall surface of the reinforcing member 3 and the inner wall surface of the main body 4 to suppress deformation, and the relationship between the notch structure portion 3d of the reinforcing member 3 and the main body 4 is suppressed. Since the stop structure portion 11 is engaged, it cannot move in the ceiling direction with respect to the external force, so that the thin plate member 1 can be prevented from being damaged from the back side of the thin plate member 1.
[0027]
In the fire detector according to the first embodiment, the thin plate member 1 and the flexible substrate 5 are joined by, for example, a double-sided tape. Next, the thin plate member 1 is bonded to the main body portion 4 by, for example, ultrasonic welding. Specifically, in order to facilitate ultrasonic welding, the thin plate member 1 and the main body portion 4 are formed of a material having a close thermal deformation temperature, preferably the same material.
[0028]
In the fire detector of the first embodiment, the floor side (the lower side in FIG. 3) end surface of the main body part 4 from the ceiling side (see FIG. 3) so that foreign matter does not enter between the thin plate member 1 and the main body part 4. The thin plate member 1 is attached to a portion slightly depressed on the upper side of 3. This recessed portion is also used for positioning the thin plate member 1 with respect to the main body portion 4.
[0029]
In the fire detector of the first embodiment, as the main body portion 4 protrudes to the floor side (lower side in FIG. 3) from the heat-sensitive surface 1a of the thin plate member 1, the horizontal direction (left and right in FIG. 3 and In order to prevent the thermal responsiveness to the airflow in the front / back direction) from decreasing, the protruding amount of the main body portion 4 to the floor side (lower side in FIG. 3) with respect to the heat-sensitive surface 1a of the thin plate member 1 is 1 mm. It is set as follows. Preferably, the protrusion amount of the main body portion 4 to the floor side (the lower side in FIG. 3) with respect to the heat-sensitive surface 1a of the thin plate member 1 is set to approximately 0 mm. That is, the depth of the recess formed in the main body portion 4 for attaching the thin plate member 1 to the main body portion 4 is set to be substantially equal to or less than the thickness of the thin plate member 1.
[0030]
Further, as described above, in the fire detector of the first embodiment, a depression is formed over the entire circumference of the main body portion 4 in order to position the thin plate member 1 with respect to the main body portion 4, but instead, It is also possible to form at least three or more protrusions on a portion of the floor side end surface of the main body portion where the outer peripheral portion of the thin plate member is positioned, and to position the thin plate member with respect to the main body portion by these protrusions.
[0031]
Moreover, according to 1st Embodiment, as shown in FIGS. 5-7, the annular part 3a is provided as a part of reinforcement member 3, and it forms in the protrusion part 3b which protrudes from the annular part 3a. The thin plate member 1 is reinforced by the reinforcing surface 3c. Therefore, for example, a stronger force can be resisted than when the plate-like member is reinforced by the protruding portion protruding from the non-annular portion (not shown).
[0032]
Hereinafter, a second embodiment of the fire detector of the present invention will be described. 8 is a view of the main part of the fire sensor according to the second embodiment of the present invention attached to the ceiling, for example, as viewed from the floor side, and FIG. 9 is a cross-sectional view taken along the line BB of the main part of the fire sensor shown in FIG. FIG. FIG. 10 is a cross-sectional view of the main body portion of the fire detector shown in FIG. 8 taken along the line CC, and FIG. 11 is a view of the main portion of the fire detector shown in FIG. FIG. 8 shows the state of the fire detector with the thin plate member 101 removed.
[0033]
8 to 11, reference numeral 101 denotes a thin plate member having a heat sensitive surface 101a on the outer side (floor side). The thin plate member 101 is made of a material having a relatively low thermal diffusivity. The thin plate member 101 also has a function as a printed board. Reference numeral 102 denotes a temperature detection element disposed inside the thin plate member 101. The temperature detection element 102 is disposed on the thin plate member 101, that is, on the printed board. Therefore, the temperature change of the thin plate member 101 can be converted into an electric signal by the temperature detection element 102. Reference numeral 110 denotes a main body part of a fire detector attached to, for example, a ceiling, and reference numeral 103 denotes an annular part constituting a part of the main body part 110. The annular portion 103 is disposed inside the thin plate member 101 in order to reinforce the thin plate member 101. That is, the main body portion 110, specifically, the annular portion 103 has a function as a reinforcing means for reinforcing the thin plate member 101. Reference numeral 103 c denotes an end face formed on the annular portion 103 for reinforcing the thin plate member 101, and 110 c denotes an attachment surface formed on the main body portion 110 for attaching the thin plate member 101 to the main body portion 110.
[0034]
As shown in FIGS. 8 to 11, in the fire detector according to the second embodiment, in order to reduce the thickness of the entire fire detector, the thickness of the thin plate member 101 is reduced to reduce the thickness of the heat sensitive part. The printed circuit board for arranging the temperature detecting element 102 is also used as the thin plate member 101.
[0035]
Specifically, as shown in FIG. 8, in the fire detector of the second embodiment, a part of the main body portion 110 is formed in an annular shape as an annular portion 103, and the thin plate member 101 is formed by the end surface 103 c of the annular portion 103. Reinforced. Therefore, for example, a stronger force can be resisted than when the plate-like member is reinforced by the end face of the non-annular portion (not shown). In the second embodiment, the annular portion 103 is formed in an elliptical shape, but instead, the annular portion may be formed in a non-elliptical annular shape such as a circular shape or a rectangular shape.
[0036]
According to the second embodiment, as shown in FIG. 9, the annular portion 103 as a reinforcing means for reinforcing the thin plate member 101 is arranged inside the thin plate member 101 (upper side in FIG. 9 ). That is, an annular portion 103 is provided as a reinforcing means for reinforcing the thin plate member 101. Therefore, damage to the thin plate member 101 can be suppressed. Further, an annular portion 103 as a reinforcing means is arranged inside the thin plate member 101. Therefore, as in the case where the reinforcing means is disposed outside the thin plate member (not shown), it is avoided that the thickness of the entire fire detector is increased by the reinforcing means protruding outward from the thin plate member. be able to. That is, damage to the thin plate member 101 can be suppressed while reducing the thickness of the entire fire detector.
[0037]
Further, in FIGS. 8 to 11, 105 is a potting agent as a reinforcing member that is filled between the annular portion component 103 and the body portion 110. That is, as shown in FIG. 9, the potting agent 105 prevents the thin plate member 101 from being damaged. The potting agent 105 prevents water leaking from the ceiling from entering the space in which the temperature detecting element 102 is accommodated. Further, the potting agent 105 prevents foreign matter from entering between the thin plate member 101 and the annular portion 103 and between the thin plate member 101 and the cover 110. That is, by filling the potting material 105, potting agent 105 thin plate members 101 and the cover 110, the thin plate member 101 and the annular portion component 103 joined respectively to seal the space temperature detecting element 102 is disposed.
[0038]
On the other hand, since the potting agent 105 is not filled in the portion surrounded by the annular portion 103 and the thin plate member, the temperature detecting element 102 can detect the temperature change of the thin plate member 101 without delay.
[0039]
FIG. 12 is a cross-sectional view of a fire sensor according to a third embodiment of the present invention attached to, for example, a ceiling. The fire detector of the third embodiment is a modification of the second embodiment, and two temperature detection elements 202a and 202b for detecting temperature are formed on a thin plate member 201 as a printed board.
[0040]
In the fire detector according to the third embodiment, a low temperature detection element 202a and a high temperature detection element 202b are provided. On the other hand, it is also possible to provide a single temperature detection element instead as in the first and second embodiments described above.
[0041]
According to the third embodiment, as in the second embodiment, a potting material 209 as a reinforcing means for reinforcing the thin plate member 201 is disposed inside of the thin plate member 201 (lower side in FIG. 1 2) ing. That is, the potting agent 209 as a reinforcing means for reinforcing the thin plate member 201 is provided.
[0042]
Furthermore, it has a waterproof function for protecting the temperature detection elements 202a and 202b from water leakage from the ceiling when the fire detector is attached to the ceiling while suppressing damage to the thin plate member 201.
[0043]
Further, similarly to the second embodiment, the thin plate member 201 is attached to the cover 210 by the potting agent 209. For this reason, the potting agent 209 prevents the thin plate member 201 from being damaged, and also functions to bond the thin plate member 201 and the cover 210. That is, the necessity to fix the thin plate member 201 to the cover 210 separately from the reinforcing means of the thin plate member 201 with screws or the like can be eliminated.
[0044]
Moreover, it is also possible to combine suitably the structure of the fire detector of the 1st to 3rd embodiment mentioned above and those modifications.
[0045]
【The invention's effect】
According to the first aspect of the present invention, it is possible to suppress breakage of the plate member. Further, it is possible to avoid an increase in the thickness of the entire fire detector by the amount of the reinforcing means protruding outward from the plate-like member as in the case where the reinforcing means is arranged outside the plate-like member. . In addition, the potting agent can protect the temperature detection means from water leakage from the ceiling when the fire detector is attached to the ceiling while suppressing damage to the plate-like member. That is, it is possible to eliminate the necessity of providing a protection means for the temperature detection means separately from the reinforcement means for the plate-like member.
[Brief description of the drawings]
FIG. 1 is a view of a fire detector according to a first embodiment of the present invention attached to, for example, a ceiling as viewed from the floor side.
FIG. 2 is a view of the fire detector shown in FIG. 1 as viewed from the horizontal direction.
FIG. 3 is a cross-sectional view taken along line AA of the fire detector shown in FIG.
4 is a view of the fire detector shown in FIG. 1 as viewed from the ceiling side. FIG.
5 is a view of the reinforcing member shown in FIG. 3 as viewed from the ceiling (upper side in FIG. 3).
6 is a view of the reinforcing member shown in FIG. 5 viewed from the floor side (the lower side of FIG. 3).
7 is a cross-sectional view taken along line AA of the reinforcing member shown in FIG.
FIG. 8 is a view of a main body portion of a fire sensor according to a second embodiment of the present invention attached to a ceiling, for example, as viewed from the floor side.
9 is a cross-sectional view taken along the line BB of the main body portion of the fire detector shown in FIG.
10 is a cross-sectional view taken along the line CC of the main body portion of the fire detector shown in FIG.
11 is a view of the main part of the fire detector shown in FIG. 8 as seen from the ceiling side.
FIG. 12 is a cross-sectional view of a fire sensor according to a third embodiment of the present invention attached to, for example, a ceiling.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thin plate member 1a Heat sensitive surface 2 Temperature detection element 3 Reinforcement member

Claims (1)

外側に感熱面を有する板状部材と、前記板状部材の内側に配置された温度検出手段とを具備する火災感知器において、
前記板状部材の内側に配置された前記温度検出手段の周囲を囲んで空間を形成する環状部分を備え、前記空間が密閉されるように前記板状部材の内側且つ前記環状部分の外側周囲にポッティング剤を充填して前記板状部材を補強する補強手段を設けたことを特徴とする火災感知器。
In a fire detector comprising a plate-like member having a heat-sensitive surface on the outside, and a temperature detection means disposed inside the plate-like member,
An annular portion that forms a space surrounding the periphery of the temperature detecting means disposed inside the plate-like member, and is provided inside the plate-like member and around the outside of the annular portion so that the space is sealed. A fire detector characterized by comprising reinforcing means for reinforcing a plate member by filling a potting agent.
JP2003064055A 2003-03-10 2003-03-10 Fire detector Expired - Fee Related JP3966469B2 (en)

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JP4592603B2 (en) * 2006-01-27 2010-12-01 ホーチキ株式会社 Heat sensor
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