JP3672219B2 - Switch - Google Patents

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Publication number
JP3672219B2
JP3672219B2 JP11887898A JP11887898A JP3672219B2 JP 3672219 B2 JP3672219 B2 JP 3672219B2 JP 11887898 A JP11887898 A JP 11887898A JP 11887898 A JP11887898 A JP 11887898A JP 3672219 B2 JP3672219 B2 JP 3672219B2
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Japan
Prior art keywords
arc
fixed contact
contact
chamber space
movable contact
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JP11887898A
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Japanese (ja)
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JPH11312449A (en
Inventor
龍也 林
貞次郎 森
敏博 伊佐治
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、電流を開閉する開閉器、例えば電磁接触器や配線用遮断器等に関し、詳しくは、固定接点を有する固定接触接点を有する可動接触子と、固定接点と可動接点との間に発生したアークの足が移行されるアークランナとが配設された消弧室空間と、可動接触子を駆動させる電磁石が配設された駆動室空間とを備えた開閉器に関するもので、特にその消弧室構造に関する。
【0002】
【従来の技術】
図4は、例えば実公平1−27542号公報に示された従来の開閉器の部分断面図である。
図中の符号1は樹脂で形成された取り付け台、2はこの取り付け台1に設置されケイ素鋼板が積層された固定鉄心、3は固定鉄心2に対向配置されケイ素鋼板が積層された可動鉄心、4は可動鉄心3と固定鉄心2とを引き外しばね(図示せず)に抗して吸着させる駆動力を付与する操作コイル、5は樹脂で成形され角窓5Aを有するクロスバーで、その下端に可動鉄心3を保持している。
符号6は上記クロスバー5の角窓5Aに挿入されて押しばね7により保持されている可動接触子、6Aは可動接触子6に接合された可動接点、8は上記可動接点6Aと接離する固定接点8Aが接合された固定接触子、この固定接触子8にはその固定接点8A接合近傍に切り抜き中空部8Dが穿設され、且つこの中空部8Dの接点側端部に前記固定接触子8と電気的に接続された倒L字状のアークランナ8Bが設けられ、このアークランナ8Bの水平片は前記中空部8D上に延在されている。8Cはこの固定接触子8の端子部を示す。
符号9は開閉器本体を外部回路と接続するための端子ねじ、10は固定接触子8を取り付けるベ−スであり、このベ−ス10には固定接触子8に設けられた切り抜き中空部8Dの下部から外部へ通じる外通路10Aが設けられている。又、符号11はア−クカバー、12は接点間に発生するア−クである。
【0003】
尚、上記のア−クカバー11で覆われたアーク12の発生する空間、即ち、固定接点8Aを有する固定接触子8と、固定接点8Aに対して接触可能な可動接点6Aを有する可動接触子6と、固定接点8Aと可動接点6Aとの間に発生したアークの足が移行されるアークランナ8Bとが配設された空間を以下、消弧室空間という。又、可動接触子6を駆動させる電磁石が配置された空間、即ち、固定鉄心2と可動鉄心3と操作コイル4とで構成される電磁石が収納された空間を、以下、駆動室空間と称する。
【0004】
次に動作について説明する。
先ず、操作コイル4に流れる電流を遮断すると、図示されていない引き外しばねにより可動鉄心3が固定鉄心2より引き離され、可動接点6Aが固定接点8Aから離れ、可動接点6Aと固定接点8Aの間にア−ク12が発生する。
次に、固定接点8Aのアーク12の足がアークランナ8Bへと移行され符号12Aで示すア−クとなる。
その後、このアーク12Aは、可動接触子6とアークランナ8Bに流れる電流によって発生する磁場により図の右方向に駆動され、アーク12Aは周囲のガスにより冷却され、電流零点において消弧され電流が遮断される。
他方、アーク12が発生し遮断されるまでにアーク12、12Aによって発生した電子やイオンを含むホットガスは、消弧室空間の圧力を高め、ベ−ス10に設けられた固定接触子8の切り抜き中空部8Dの下部から外部へ通じる外通路10Aを通して外部へと放出される。
【0005】
【発明が解決しようとする課題】
従来の開閉器では、上述のようにアーク12の発生後、電子やイオンを含むホットガスが消弧室空間から外通路を通じて外部へと放出される構造となっていたため、人体に対し火傷を負わせる等の危険性があった。
又、この種の開閉器の取り付けは、固定接触子8の端子部8Cを天に、固定接点8Aを地に向けて取り付けるため、外部へ通じる外通路10Aや、固定接触子8とア−クカバー11との間隙からゴミが入り易く、接点6A,8Aの閉極時に接点6A,8A間にゴミが挟まり接触不良を起こすという不都合もあった。
本発明は、かかる問題を解消し、安全で高性能の開閉器の提供を目的とするものである。
【0006】
【課題を解決するための手段】
この発明は、固定接点を有する固定接触子、前記固定接点に対して接触可能な可動接点を有する可動接触子、前記固定接触子に固定接点接合近傍に切り抜き中空部が穿設され、且つ前記切り抜き中空部の前記固定接点側端部に前記固定接触子と電気的に接続され前記固定接点と可動接点との間に発生するアークの足が移行される倒L字状のアークランナが配設された消弧室空間と、前記可動接触子を駆動させる電磁石が配置された駆動室空間と、前記固定接触子に穿設された切り抜き中空部の下方のベース面を開口し、前記消弧室空間と駆動室空間とを連通する連通路と、を設け、当該連通路の連通路内空間側に上記消弧室内に延在する固定接触子の一部をアークランナと離れる方向へ段差をつけて折り曲げ、迂回させたことを特徴とする。
【0011】
また、連通路の一部又は全部に吸熱部材を設けたことを特徴とする。
【0012】
【発明の実施の形態】
実施の形態1.
実施の形態1は、固定接点を有する固定接触子、前記固定接点に対して接触可能な可動接点を有する可動接触子、前記固定接点と可動接点との間に発生したアークの足が移行されるアークランナ等が配設された消弧室空間と、可動接触子を駆動させる電磁石が配設された駆動室空間との間を連通する連通路を設けたものである。
図1は、この実施の形態1を示す開閉器の部分断面図である。
図中の符号1は樹脂で形成された取り付け台、2はこの取り付け台1に設置されケイ素鋼板が積層された固定鉄心、3は固定鉄心2に対向配置されケイ素鋼板が積層された可動鉄心、4は可動鉄心3と固定鉄心2とを引き外しばね(図示せず)に抗して吸着させる駆動力を付与する操作コイル、5は樹脂で成形され角窓5Aを有するクロスバーで、その下端では可動鉄心3を保持している。
【0013】
符号6は上記クロスバー5の角窓5Aに挿入されて押しばね7により保持されている可動接触子、6Aは可動接触子6に接合された可動接点、8は上記可動接点6Aと接離する固定接点8Aが接合された固定接触子であり、この固定接触子8にはその固定接点8A接合近傍に切り抜き中空部8Dが穿設され、且つこの中空部8Dの接点側端部に前記固定接触子8と電気的に接続された倒L字状のアークランナ8Bが設けられ、このアークランナ8Bの水平片は前記中空部8D上に延在されている。8Cはこの固定接触子8の端子部を示す。又、9は開閉器本体を外部回路と接続するための端子ねじ、10は固定接触子8を取り付けるベ−スである。
消弧室空間と駆動室空間とを連通する連通路10Bは、このベース10に設けられており、消弧室空間側においては、固定接触子8に設けられた切り抜き中空部8Dの下方のベース10面にその一方の口が開口している。
【0014】
次に動作について説明する。
先ず、操作コイル4に流れる電流を遮断すると、図示されていない引き外しばねにより可動鉄心3が固定鉄心2より引き離され、可動接点6Aが固定接点8Aから離れ、可動接点6Aと固定接点8Aの間にア−ク12が発生する。
次に、固定接点8Aのアーク12の足がアークランナ8Bへと移行し12Aのア−クとなる。
その後、アーク12Aは可動接触子6とアークランナ8Bに流れる電流によって発生する磁場により図の右方向に駆動され、アーク12Aは周囲のガスにより冷却され、電流零点において消弧され電流が遮断される。
又、アーク12が発生して遮断されるまでにアーク12、12Aによって発生した電子やイオンを含むホットガスは、消弧室空間の圧力を高め、ベ−ス10に設けられた固定接触子8の切り抜き中空部8Dの下方の開口から連通路10Bを経て圧力の低い駆動室空間へと放出される。尚、このガスの流れによりアーク12はアーク12Aへと移行が促進される。
【0015】
このように、この実施の形態1では、従来の開閉器と異なり、外部へホットガスを放出する外通路10Aが存在せず、ホットガスは開閉器内部の駆動室空間へと放出されるため、外部へのホットガスの放出は無い。
又、消弧室空間を構成するベ−ス10と当該ベース10を覆うア−クカバー11との間隙からのホットガスの漏れも、駆動室空間へホットガスを放出するため、大きく抑制される。従って、人体に対し火傷を負わせる危険性は従来の開閉器に較べ顕著に改善される。
【0016】
実施の形態2.
実施の形態2は、消弧室空間と駆動室空間とを連通する連通路10Bを設け、この連通路10Bの消弧室空間側の開口内、即ち連通路内空間に、延在する固定接触子8の一部を迂回させたものである。
図2は、この実施の形態2を示す開閉器の部分断面図である。
図2において、ベース10面に沿って延在する固定接触子8は、ベース10面に穿設された連通路10Bの開口部、即ち連通路内空間へ、固定接触子8の延在部分の一部が沈み込むように、アークランナー8Bと離れる方向へ段差つけて折り曲げられている。
この形態2では、固定接触子8の切り抜き中空部8Dの一部が、この折り曲げ領域即ち段差部に含まれるよう構成されているが、切り抜き中空部8Dの全部が含まれるように構成してもよい。
尚、固定接触子8に設けられた段差部を除けば実施例1と同様であるので、他の部分の説明を省略する。また、動作についても段差部の効果を除けば実施例1と同様であるので省略する。
【0017】
この実施の形態2では、固定接触子8に上記のような段差部を構成することによって、固定接触子8に設けられた段差部から固定接触子8の端子部8Cに向かうア−クカバー11までの固定接触子8の延在部分において、消弧室空間が拡大される。
このように、連通路空間へ固定接触子8の延在部分を迂回させることによって、従来に較べて、消弧室空間が大きく拡大されるので、当該消弧室空間内でのホットガスの圧力が低下して、ホットガスの放出速度が小さくなると共に、ガスの駆動室空間への放出量も減少するから、従来と同様の駆動室空間をそのまま活用することができ、殊更、駆動室空間を拡張する必要がなくなる。
又、ベ−ス10とア−クカバー11との間隙からのホットガスの漏れも一層抑制され、人体に対する火傷の危険性が更に改善される。
【0018】
本発明では、実施の形態1、2のように、固定接点8Aや可動接点6Aやアークランナ8B等が配設される消弧室空間に外部と通じる外通路10Aが、従来と異なり、設けられていないため、この外通路を通じてのゴミの侵入が全く解消される。
他方、実施の形態2のように、固定接触子8とア−クカバー11との間隙から侵入してきたゴミに対しては、固定接触子8に上述のような段差部が設けられ、固定接触子8の切り抜き中空部8Dの一部又は全部が、この段差部に含まれるよう構成しているため、侵入して来たゴミは駆動室空間へ通じる連通路10Bを通って駆動室空間へと落ちて行く。これによって、可動接点6A,固定接点8Aの接触不良が顕著に抑制改善され、安全で高性能の開閉器を提供することができる。
【0019】
仮に、駆動室空間へ通じる連通路10Bの一方の口が消弧室空間に開口していない場合、侵入したゴミは固定接触子8の切り抜き中空部8Dに溜まる一方となり、遂には、溜まったゴミが、可動接点6Aと固定接点8Aとの開閉に伴う振動により切り抜き中空部8Dから、これらの接点6A,8A間に落ちて挟まり接触不良をおこしてしまう。従って、侵入ゴミは、連通路10Bを通して駆動室空間へと速やかに導いて遣ることが望ましいのである。
【0020】
実施の形態3.
実施の形態3は、消弧室空間と駆動室空間とを連通する連通路10Bの内壁の一部又は全部に吸熱部材を設けたものである。
図3は、この実施の形態3を示す開閉器の部分断面図である。
図3において、符号15は吸熱部材として吸熱板であり、連通路10Bの内壁の全部に設けてある。
尚、この吸熱部材として吸熱板15を除けば実施の形態1と同様であるので、他の部分の説明を省略する。又、動作についても、この吸熱部材として吸熱板15段を設けることによる効果を除けば実施の形態1と同様であるので省略する。
【0021】
消弧室空間で発生したホットガスがベ−ス10の面に開口した連通路10Bを通って駆動室区間へと流れる際に、ホットガスが吸熱板15によって冷却されて行く。この結果、駆動室空間へは冷却されたホットガスが放出されるため、駆動室空間の圧力上昇が抑制されることになり、消弧部空間から駆動室空間へのホットガスの流れが一層円滑となり、その流れが強化される。
従って、消弧室空間から外部空間へと漏れ出るホットガスの勢いや漏れ量が顕著に抑制される。
【0022】
尚、吸熱部材としては、この実施形態に示す板状のものに限らず、筒状のものや、襞が設けられた形状のものであってもよい。
又、消弧部空間と駆動室空間とを連通する連通路10Bの形状の如何はこの発明の作用効果に影響を与えるものではない。よって、例えば、吸熱部材としての吸熱板15は、実施の形態1〜3に示した連通路10Bの形状に限らず、その他の形状の連通路に広く適用することができる。
【0023】
【発明の効果】
この発明によれば、アークによって生じるホットガスが、連通路を通して消弧室空間から電磁石を収納する駆動室空間に放出されるので、従来例のように、外通路からの外部ホットガスの放出を無くすことができ、又、ベ−スとア−クカバーとの間隙からの放出(漏れ)も抑制されるため、人体に対する火傷の危険性を大幅に改善することができる。
【0024】
又、固定接触子の延在部分を連通路内空間へ迂回させることにより、迂回された固定接触子の延在部分に相当する空間分が従来の消弧室空間に較べて拡大して、消弧室空間でのホットガスの圧力の低下、駆動室空間への放出量や放出圧力の減少、ひいては、消弧室空間と駆動室空間及び連通路空間にてホットガスを処理することができる。又、消弧室空間でのホットガスの圧力の低下により、ベ−スとア−クカバーとの間隙からの漏れホットガスの放出量、放出圧力が少なくなり、人体に対する火傷の危険性が従来例に対し大幅に改善される。
【0025】
又、固定接触子の中空部を介して連通路の消弧室空間側の開口が設けてあるため、消弧室空間に入ってきたゴミは速やかに連通路を経て駆動室空間へと導かれるので、固定接点と可動接点との接触不良を大幅に抑制改善することができる。
【0026】
又、連通路に吸熱板を設けることによって、連通路を通過するホットガスが吸熱板で冷却され、連通路及び駆動部の熱による損傷が抑えられる。
【図面の簡単な説明】
【図1】 本発明の実施の形態1の開閉器の部分断面図である。
【図2】 本発明の実施の形態2の開閉器の部分断面図である。
【図3】 本発明の実施の形態3の開閉器の部分断面図である。
【図4】 従来例の開閉器の部分断面図である。
【符号の説明】
1 取り付け台、2 固定鉄心、3 可動鉄心、4 操作コイル、5 クロスバー、6 可動接触子、6A 可動接点、8 固定接触子、8A 固定接点、8B アークランナー、8D 切り抜き中空部、10 ベース、10B 連通路、11 アークカバー、12 アーク、12A 移行したアーク、15 吸熱板。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch for opening and closing a current, for example, an electromagnetic contactor or a circuit breaker for wiring, and more specifically, a movable contact having a fixed contact having a fixed contact, and generated between the fixed contact and the movable contact. The present invention relates to a switch having an arc extinguishing chamber space in which an arc runner to which the arc leg is transferred and a driving chamber space in which an electromagnet for driving a movable contact is arranged, It relates to the room structure.
[0002]
[Prior art]
FIG. 4 is a partial cross-sectional view of a conventional switch disclosed in, for example, Japanese Utility Model Publication No. 1-27542.
Reference numeral 1 in the figure denotes a mounting base made of resin, 2 a fixed iron core that is installed on the mounting base 1 and laminated with silicon steel plates, 3 is a movable iron core that is disposed opposite to the fixed iron core 2 and laminated with silicon steel plates, 4 is an operation coil for applying a driving force for pulling the movable iron core 3 and the fixed iron core 2 against the spring (not shown), and 5 is a cross bar formed of resin and having a square window 5A. The movable iron core 3 is held on.
Reference numeral 6 denotes a movable contact that is inserted into the square window 5A of the cross bar 5 and is held by the push spring 7. 6A is a movable contact joined to the movable contact 6. 8 is close to and away from the movable contact 6A. A fixed contact 8A to which the fixed contact 8A is joined, and the fixed contact 8 is provided with a cutout hollow portion 8D in the vicinity of the joint of the fixed contact 8A, and the fixed contact 8 at the contact side end of the hollow portion 8D. An arc L-shaped arc runner 8B that is electrically connected to the arc runner 8B is provided, and a horizontal piece of the arc runner 8B extends on the hollow portion 8D. Reference numeral 8 </ b> C denotes a terminal portion of the fixed contact 8.
Reference numeral 9 is a terminal screw for connecting the switch body to an external circuit, and 10 is a base to which the fixed contact 8 is attached. The base 10 has a cutout hollow portion 8D provided in the fixed contact 8. An outer passage 10 </ b> A leading from the lower part to the outside is provided. Reference numeral 11 is an arc cover, and 12 is an arc generated between the contacts.
[0003]
In addition, the space where the arc 12 covered with the arc cover 11 is generated, that is, the fixed contact 8 having the fixed contact 8A, and the movable contact 6 having the movable contact 6A that can contact the fixed contact 8A. A space in which the arc runner 8B to which the foot of the arc generated between the fixed contact 8A and the movable contact 6A is transferred is hereinafter referred to as an arc extinguishing chamber space. A space in which an electromagnet for driving the movable contact 6 is arranged, that is, a space in which an electromagnet composed of the fixed iron core 2, the movable iron core 3, and the operation coil 4 is housed is hereinafter referred to as a drive chamber space.
[0004]
Next, the operation will be described.
First, when the current flowing through the operation coil 4 is interrupted, the movable iron core 3 is separated from the fixed iron core 2 by a tripping spring (not shown), the movable contact 6A is separated from the fixed contact 8A, and between the movable contact 6A and the fixed contact 8A. The arc 12 is generated.
Next, the leg of the arc 12 of the fixed contact 8A is shifted to the arc runner 8B to become an arc indicated by reference numeral 12A.
Thereafter, the arc 12A is driven in the right direction in the figure by the magnetic field generated by the current flowing through the movable contact 6 and the arc runner 8B, and the arc 12A is cooled by the surrounding gas and extinguished at the current zero point to cut off the current. The
On the other hand, the hot gas containing electrons and ions generated by the arcs 12 and 12A until the arc 12 is generated and cut off increases the pressure in the arc extinguishing chamber space, and the fixed contact 8 provided in the base 10 It is discharged to the outside through the outer passage 10A communicating from the lower part of the cutout hollow portion 8D to the outside.
[0005]
[Problems to be solved by the invention]
In the conventional switch, as described above, after the arc 12 is generated, the hot gas containing electrons and ions is discharged from the arc extinguishing chamber space to the outside through the outer passage, so that the human body is burned. There was danger, such as letting.
In addition, since this type of switch is mounted with the terminal portion 8C of the fixed contact 8 facing the top and the fixed contact 8A facing the ground, the external passage 10A leading to the outside, the fixed contact 8 and the arc cover 11, dust is likely to enter through the gap between the contacts 11A and 8A, and when the contacts 6A and 8A are closed, dust is caught between the contacts 6A and 8A, resulting in poor contact.
The present invention aims to solve such problems and provide a safe and high-performance switch.
[0006]
[Means for Solving the Problems]
The present invention relates to a fixed contact having a fixed contact, a movable contact having a movable contact that can contact the fixed contact, a cutout hollow portion formed in the fixed contact in the vicinity of the fixed contact, and the cutout An inverted L-shaped arc runner that is electrically connected to the fixed contact and is transferred between the fixed contact and the movable contact is disposed at an end of the hollow portion on the fixed contact side. An arc-extinguishing chamber space, a driving chamber space in which an electromagnet for driving the movable contact is disposed, a base surface below a cutout hollow portion formed in the stationary contact, and the arc-extinguishing chamber space, A communication passage that communicates with the driving chamber space, and bends a part of the stationary contact that extends into the arc extinguishing chamber on the side of the communication passage in the communication passage with a step in a direction away from the arc runner, Characterized by detouring.
[0011]
Further , a heat absorbing member is provided in part or all of the communication path.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
In the first embodiment, a fixed contact having a fixed contact, a movable contact having a movable contact capable of contacting the fixed contact, and a leg of an arc generated between the fixed contact and the movable contact are transferred. A communication path is provided to communicate between the arc-extinguishing chamber space in which an arc runner or the like is disposed and the driving chamber space in which an electromagnet for driving the movable contact is disposed.
FIG. 1 is a partial cross-sectional view of a switch showing the first embodiment.
Reference numeral 1 in the figure denotes a mounting base made of resin, 2 a fixed iron core that is installed on the mounting base 1 and laminated with silicon steel plates, 3 is a movable iron core that is disposed opposite to the fixed iron core 2 and laminated with silicon steel plates, 4 is an operation coil for applying a driving force for pulling the movable iron core 3 and the fixed iron core 2 against the spring (not shown), and 5 is a cross bar formed of resin and having a square window 5A. Then, the movable iron core 3 is held.
[0013]
Reference numeral 6 denotes a movable contact that is inserted into the square window 5A of the cross bar 5 and is held by the push spring 7. 6A is a movable contact joined to the movable contact 6. 8 is close to and away from the movable contact 6A. A fixed contact 8A is joined to the fixed contact 8 and a cutout hollow portion 8D is formed in the fixed contact 8 near the joint of the fixed contact 8A, and the fixed contact is formed at the contact side end of the hollow portion 8D. An inverted L-shaped arc runner 8B electrically connected to the child 8 is provided, and a horizontal piece of the arc runner 8B extends on the hollow portion 8D. Reference numeral 8 </ b> C denotes a terminal portion of the fixed contact 8. Further, 9 is a terminal screw for connecting the switch body to an external circuit, and 10 is a base to which the fixed contact 8 is attached.
The communication path 10B that communicates the arc-extinguishing chamber space and the drive chamber space is provided in the base 10, and on the arc-extinguishing chamber space side, a base below the cutout hollow portion 8D provided in the fixed contact 8 is provided. One of the openings is open on the 10th surface.
[0014]
Next, the operation will be described.
First, when the current flowing through the operation coil 4 is interrupted, the movable iron core 3 is separated from the fixed iron core 2 by a tripping spring (not shown), the movable contact 6A is separated from the fixed contact 8A, and between the movable contact 6A and the fixed contact 8A. The arc 12 is generated.
Next, the leg of the arc 12 of the fixed contact 8A moves to the arc runner 8B and becomes an arc of 12A.
Thereafter, the arc 12A is driven in the right direction in the figure by the magnetic field generated by the current flowing through the movable contact 6 and the arc runner 8B, and the arc 12A is cooled by the surrounding gas and extinguished at the current zero point to cut off the current.
Further, the hot gas containing electrons and ions generated by the arcs 12 and 12A before the arc 12 is generated and cut off increases the pressure in the arc extinguishing chamber space, and the fixed contact 8 provided in the base 10 From the opening below the cutout hollow portion 8D through the communication passage 10B to the drive chamber space having a low pressure. The transition of the arc 12 to the arc 12A is promoted by this gas flow.
[0015]
As described above, in the first embodiment, unlike the conventional switch, there is no external passage 10A that discharges hot gas to the outside, and the hot gas is discharged into the drive chamber space inside the switch. There is no release of hot gas to the outside.
Further, leakage of hot gas from the gap between the base 10 constituting the arc-extinguishing chamber space and the arc cover 11 covering the base 10 is greatly suppressed because the hot gas is released to the driving chamber space. Therefore, the risk of burns to the human body is remarkably improved as compared with the conventional switch.
[0016]
Embodiment 2. FIG.
In the second embodiment, a communication passage 10B that communicates the arc-extinguishing chamber space and the drive chamber space is provided, and the fixed contact extending in the opening of the communication passage 10B on the arc-extinguishing chamber space side, that is, in the communication passage inner space. A part of the child 8 is bypassed.
FIG. 2 is a partial cross-sectional view of the switch showing the second embodiment.
In FIG. 2, the stationary contact 8 extending along the surface of the base 10 is connected to the opening of the communication path 10 </ b> B drilled in the surface of the base 10, i.e., the space inside the communication path. It is bent with a step in a direction away from the arc runner 8B so that a part of it sinks.
In the second embodiment, a part of the cutout hollow portion 8D of the fixed contact 8 is configured to be included in the bent region, that is, the stepped portion, but may be configured to include the entire cutout hollow portion 8D. Good.
In addition, since it is the same as that of Example 1 except the level | step-difference part provided in the stationary contact 8, description of another part is abbreviate | omitted. Further, the operation is the same as that of the first embodiment except for the effect of the stepped portion, and the description thereof will be omitted.
[0017]
In the second embodiment, the above-described stepped portion is formed on the fixed contact 8 to the arc cover 11 from the stepped portion provided on the fixed contact 8 toward the terminal portion 8C of the fixed contact 8. The arc extinguishing chamber space is expanded in the extending portion of the stationary contact 8.
Thus, by detouring the extending portion of the stationary contact 8 to the communication passage space, the arc extinguishing chamber space is greatly enlarged as compared with the conventional case, so the pressure of the hot gas in the arc extinguishing chamber space is increased. As a result, the discharge speed of the hot gas is reduced and the amount of gas released to the drive chamber space is also reduced. Therefore, the drive chamber space similar to the conventional one can be used as it is, and in particular, the drive chamber space is reduced. No need to expand.
Further, leakage of hot gas from the gap between the base 10 and the arc cover 11 is further suppressed, and the risk of burns to the human body is further improved.
[0018]
In the present invention, as in the first and second embodiments, an outer passage 10A that communicates with the outside is provided in the arc extinguishing chamber space in which the fixed contact 8A, the movable contact 6A, the arc runner 8B, and the like are disposed. Therefore, the intrusion of dust through this outer passage is completely eliminated.
On the other hand, as in the second embodiment, for the dust that has entered from the gap between the fixed contact 8 and the arc cover 11, the fixed contact 8 is provided with the stepped portion as described above. Since part or all of the cutout hollow portion 8D is included in this stepped portion, the invading dust falls into the driving chamber space through the communication passage 10B leading to the driving chamber space. Go. Thereby, the contact failure of the movable contact 6A and the fixed contact 8A is remarkably suppressed and improved, and a safe and high-performance switch can be provided.
[0019]
If one of the communication passages 10B leading to the drive chamber space is not open to the arc-extinguishing chamber space, the invading dust will be accumulated in the cutout hollow portion 8D of the fixed contact 8 and finally the collected dust. However, due to the vibration accompanying the opening and closing of the movable contact 6A and the fixed contact 8A, the hollow portion 8D falls between these contacts 6A and 8A, causing a contact failure. Therefore, it is desirable that the intrusion dust be quickly guided to the driving chamber space through the communication path 10B.
[0020]
Embodiment 3 FIG.
In the third embodiment, a heat absorbing member is provided on a part or all of the inner wall of the communication path 10B that communicates the arc-extinguishing chamber space and the drive chamber space.
FIG. 3 is a partial cross-sectional view of the switch showing the third embodiment.
In FIG. 3, reference numeral 15 denotes a heat absorbing plate as a heat absorbing member, which is provided on the entire inner wall of the communication path 10B.
Since the heat absorbing member 15 is the same as that of the first embodiment except for the heat absorbing plate 15, the description of other parts is omitted. The operation is also the same as that of the first embodiment except for the effect of providing the heat absorbing plate 15 steps as the heat absorbing member, and the description thereof is omitted.
[0021]
When the hot gas generated in the arc extinguishing chamber space flows to the drive chamber section through the communication passage 10B opened in the surface of the base 10, the hot gas is cooled by the heat absorbing plate 15. As a result, the cooled hot gas is released into the driving chamber space, so that the pressure increase in the driving chamber space is suppressed, and the flow of hot gas from the arc extinguishing section space to the driving chamber space is smoother. And the flow is strengthened.
Therefore, the momentum and the amount of leakage of hot gas that leaks from the arc extinguishing chamber space to the external space are remarkably suppressed.
[0022]
The heat absorbing member is not limited to the plate shape shown in this embodiment, and may be a cylindrical shape or a shape provided with a flange.
Further, the shape of the communication path 10B that communicates the arc extinguishing portion space and the drive chamber space does not affect the operational effects of the present invention. Therefore, for example, the heat absorbing plate 15 as the heat absorbing member is not limited to the shape of the communication path 10B shown in the first to third embodiments, and can be widely applied to communication paths of other shapes.
[0023]
【The invention's effect】
According to the present invention , the hot gas generated by the arc is released from the arc-extinguishing chamber space to the driving chamber space that houses the electromagnet through the communication passage, so that the external hot gas is released from the outer passage as in the conventional example. Further, since the discharge (leakage) from the gap between the base and the arc cover is suppressed, the risk of burns to the human body can be greatly improved.
[0024]
Further, by diverting the extended portion of the fixed contact to the space in the communication path, the space corresponding to the extended portion of the fixed contact that has been detoured is enlarged as compared with the conventional arc extinguishing chamber space. The hot gas can be processed in the arc-extinguishing chamber space, the driving chamber space, and the communication passage space by reducing the pressure of the hot gas in the arc chamber space, decreasing the discharge amount and the discharge pressure to the driving chamber space. Also, due to the decrease in hot gas pressure in the arc extinguishing chamber space, the amount of hot gas leaked from the gap between the base and the arc cover and the discharge pressure are reduced, and there is a risk of burns on the human body. This is a significant improvement.
[0025]
Further, since the opening of the communication path in the arc extinguishing chamber space side is provided through the hollow portion of the fixed contact, the dust that has entered the arc extinguishing chamber space is promptly guided to the driving chamber space through the communication path. Therefore, contact failure between the fixed contact and the movable contact can be greatly suppressed and improved.
[0026]
Further, by providing the heat absorption plate in the communication path, hot gas passing through the communication path is cooled by the heat absorption plate, and damage to the communication path and the drive unit due to heat is suppressed.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of a switch according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of a switch according to a second embodiment of the present invention.
FIG. 3 is a partial cross-sectional view of a switch according to Embodiment 3 of the present invention.
FIG. 4 is a partial cross-sectional view of a conventional switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mounting base, 2 Fixed iron core, 3 Movable iron core, 4 Operating coil, 5 Crossbar, 6 Movable contact, 6A Movable contact, 8 Fixed contact, 8A Fixed contact, 8B Arc runner, 8D Cut-out hollow part, 10 base, 10B communication path, 11 arc cover, 12 arc, 12A transitioned arc, 15 heat absorption plate.

Claims (2)

固定接点を有する固定接触子、前記固定接点に対して接触可能な可動接点を有する可動接触子、前記固定接触子に固定接点接合近傍に切り抜き中空部が穿設され、且つ前記切り抜き中空部の前記固定接点側端部に前記固定接触子と電気的に接続され前記固定接点と可動接点との間に発生したアークの足が移行される倒L字状のアークランナが配設された消弧室空間と、前記可動接触子を駆動させる電磁石が配置された駆動室空間と、前記固定接触子に穿設された切り抜き中空部の下方のベース面を開口し、前記消弧室空間と駆動室空間とを連通する連通路と、を設け、当該連通路の連通路内空間側に上記消弧室内に延在する固定接触子の一部をアークランナと離れる方向へ段差をつけて折り曲げ、迂回させたことを特徴とする開閉器。  A fixed contact having a fixed contact, a movable contact having a movable contact capable of contacting the fixed contact, a cutout hollow portion formed in the fixed contact in the vicinity of the fixed contact joint, and the cutout hollow portion; Arc-extinguishing chamber space in which an inverted L-shaped arc runner is connected to the fixed contact side end portion and is electrically connected to the fixed contact and to which an arc leg generated between the fixed contact and the movable contact is transferred. A driving chamber space in which an electromagnet for driving the movable contact is disposed, a base surface below a cutout hollow portion formed in the stationary contact, and the arc extinguishing chamber space and the driving chamber space. A part of the stationary contact extending in the arc extinguishing chamber is bent with a step in a direction away from the arc runner on the space side in the communication path of the communication path. A switch characterized by. 連通路の一部又は全部に吸熱部材を設けたことを特徴とする請求項1に記載の開閉器。The switch according to claim 1 , wherein a heat absorbing member is provided in a part or all of the communication path.
JP11887898A 1998-04-28 1998-04-28 Switch Expired - Fee Related JP3672219B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11887898A JP3672219B2 (en) 1998-04-28 1998-04-28 Switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11887898A JP3672219B2 (en) 1998-04-28 1998-04-28 Switch

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Publication Number Publication Date
JPH11312449A JPH11312449A (en) 1999-11-09
JP3672219B2 true JP3672219B2 (en) 2005-07-20

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Publication number Priority date Publication date Assignee Title
JP5131218B2 (en) * 2008-09-12 2013-01-30 アンデン株式会社 Electromagnetic relay

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