JPH0589738A - Switch - Google Patents
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- Publication number
- JPH0589738A JPH0589738A JP27661491A JP27661491A JPH0589738A JP H0589738 A JPH0589738 A JP H0589738A JP 27661491 A JP27661491 A JP 27661491A JP 27661491 A JP27661491 A JP 27661491A JP H0589738 A JPH0589738 A JP H0589738A
- Authority
- JP
- Japan
- Prior art keywords
- fixed contact
- contact
- fixed
- movable
- movable contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電流を開閉する開閉
器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch for opening and closing an electric current.
【０００２】[0002]
【従来の技術】図３は例えば特公平２−６１７０号公報
に示された従来の開閉器を示す部分断面図であり、図４
はその固定接触子を示すものである。なお図３の電磁接
触器は左右対称である。図において、１はプラスチック
で形成された取付台、２はこの取付台上にケイ素鋼板で
積層された固定鉄心、３は固定鉄心２に対向して設置さ
れ同じくケイ素鋼板で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はプラスチ
ックで形成され角窓５ａを有するクロスバーで、その下
端に上記可動鉄心３を保持している。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により押圧保持
されている可動接触子、６Ａはこの可動接触子６の先端
に設けられた可動接点、８は可動接触子６と対向して設
けられ電流を導通させる固定接触子で、８Ａはこの固定
接触子８の先端に設けられた固定接点、８Ｂは固定接触
子８の端子部である。９はこの端子部８Ｂに螺着され電
磁接触器本体を外部回路と接続するための端子ねじ、１
０は固定接触子８を取付けるベース、１１は電磁接触子
の上面を覆うカバーである。2. Description of the Related Art FIG. 3 is a partial sectional view showing a conventional switch disclosed in Japanese Patent Publication No. 2-6170, for example.
Indicates the fixed contact. The electromagnetic contactor in FIG. 3 is symmetrical. In the figure, 1 is a mounting base made of plastic, 2 is a fixed iron core laminated on this mounting base with a silicon steel plate, 3 is a movable iron core which is installed facing the fixed iron core 2 and is also laminated with a silicon steel plate, Reference numeral 4 is an operation coil for applying a driving force for attracting the movable iron core 3 and the fixed iron core 2 against a tripping spring (not shown), and 5 is a crossbar formed of plastic and having a square window 5a, and its lower end. Holds the movable iron core 3. 6 is a movable contactor which is inserted into the square window 5a of the crossbar 5 and is pressed and held by a pressing spring 7, 6A is a movable contact provided at the tip of the movable contactor 6, and 8 is a movable contactor 6. Fixed contacts provided opposite to each other for conducting current, 8A is a fixed contact provided at the tip of the fixed contact 8, and 8B is a terminal portion of the fixed contact 8. A terminal screw 9 is screwed to the terminal portion 8B for connecting the main body of the electromagnetic contactor to an external circuit.
Reference numeral 0 is a base to which the fixed contactor 8 is attached, and 11 is a cover that covers the upper surface of the electromagnetic contactor.
【０００３】次に動作について説明する。この従来の電
磁接触器において、操作コイル４を消磁すると、図示さ
れない引外しばねにより可動鉄心３が固定鉄心２より開
離し、クロスバー５が図３に示す状態となり、固定接点
８Ａと可動接点６Ａとが開離して固定接点８Ａと可動接
点６Ａとの間にアーク１２が生じるが、このアーク１２
は電流零点において消弧され、電流がしゃ断されること
になる。Next, the operation will be described. In this conventional electromagnetic contactor, when the operating coil 4 is demagnetized, the movable iron core 3 is separated from the fixed iron core 2 by a trip spring (not shown), the crossbar 5 is brought into the state shown in FIG. 3, and the fixed contact point 8A and the movable contact point 6A. Are separated from each other and an arc 12 is generated between the fixed contact 8A and the movable contact 6A.
Is extinguished at the current zero point and the current is cut off.
【０００４】[0004]
【発明が解決しようとする課題】ところで、従来の電磁
接触器においては、図５に示すように、アーク１２は、
可動接触子６の導通電流Ｉが作る磁界に基づく駆動力Ｆ
２と、固定接触子８の導通電流Ｉが作る磁界に基づく駆
動力Ｆ１とを受けるが、これらＦ１とＦ２の大きさがほ
ぼ同一で向きが逆であるため、アーク１２は可動接点６
Ａと固定接点８Ａの上で膠着することになる。従ってア
ーク１２の駆動が行なわれないので、従来の電磁接触器
においては、良好なしゃ断性能が得られず、また、アー
クの足が接点外に転移されないため、接点消耗が多いと
いう欠点を有していた。By the way, in the conventional electromagnetic contactor, as shown in FIG.
Driving force F based on the magnetic field generated by the conduction current I of the movable contact 6
2 and the driving force F 1 based on the magnetic field generated by the conduction current I of the fixed contactor 8. However, since the magnitudes of these F 1 and F 2 are almost the same and the directions are opposite, the arc 12 moves. 6
It will stick on A and the fixed contact 8A. Therefore, since the arc 12 is not driven, the conventional electromagnetic contactor has a drawback that good breaking performance cannot be obtained, and the foot of the arc is not transferred to the outside of the contact, so that contact wear is large. Was there.
【０００５】この発明は上記のような問題点を解消する
ためになされたもので、固定接触子自体の形状を変更す
ることで、固定接点の消耗を低減することを目的とする
ものである。The present invention has been made in order to solve the above problems, and an object thereof is to reduce the wear of fixed contacts by changing the shape of the fixed contact itself.
【０００６】[0006]
【課題を解決するための手段】この発明に係る開閉器
は、固定接触子の固定接点近傍に、これと対向する可動
接点側に突き出た突出部を設け、かつこの突出部と可動
接点の間の最短距離を固定接点全開時において、固定接
点と可動接点の間の最短距離よりも小さくしたものであ
る。A switch according to the present invention is provided with a protrusion protruding toward a movable contact facing the fixed contact of a fixed contact, and between the protrusion and the movable contact. The minimum distance is smaller than the shortest distance between the fixed contact and the movable contact when the fixed contact is fully opened.
【０００７】[0007]
【作用】この発明における開閉器では、可動接点と固定
接点の間に生じたアークが、可動接点と固定接触子の突
出部との間に転移するので、固定接点の消耗が低減され
る。In the switch according to the present invention, the arc generated between the movable contact and the fixed contact is transferred between the movable contact and the protruding portion of the fixed contact, so that the wear of the fixed contact is reduced.
【０００８】[0008]
実施例１．以下、この発明の一実施例を図について説明
する。図において、６は可動接触子、６Ａは可動接点、
８は固定接触子、８Ａは固定接点であり、８Ｃは固定接
触子８に設けられたＵ字状の突出部で、固定接点８Ａの
近傍に、可動接点６Ａ側へ突出するように設けられてお
り、しかも固定接点全開時において、Ｕ字状突出部と可
動接点の間の最短距離が、固定接点と可動接点の間の最
短距離よりも小さくなるように設定されている。なお、
上記以外の部分については図３に示す従来の開閉器と同
一であるので説明を省略する。Example 1. An embodiment of the present invention will be described below with reference to the drawings. In the figure, 6 is a movable contact, 6A is a movable contact,
Reference numeral 8 is a fixed contactor, 8A is a fixed contact, 8C is a U-shaped protrusion provided on the fixed contactor 8, and is provided in the vicinity of the fixed contact 8A so as to protrude toward the movable contact 6A. In addition, the shortest distance between the U-shaped protrusion and the movable contact is set to be smaller than the shortest distance between the fixed contact and the movable contact when the fixed contact is fully opened. In addition,
The parts other than the above are the same as those of the conventional switch shown in FIG.
【０００９】次に動作について説明する。従来と同様に
操作コイル４の消磁により、固定接点８Ａから可動接点
６Ａが開離すると、両接点間にアーク１２が形成される
が、このとき、固定接触子８の固定接点近傍に可動接点
側に突出するＵ字状突出部８Ｃが設けられてあり、しか
も固定接点全開時において、このＵ字状突出部と可動接
点の間の最短距離を、固定接点と可動接点の間の最短距
離よりも小さく設定しているので、固定接点上のアーク
１２の足が固定接触子８の突出部８Ｃに転移し、アーク
１２はアーク１２Ａのようになる。このように固定接点
上のアークの足が固定接触子の突出部に転移するので、
固定接点の消耗が低減される。Next, the operation will be described. When the movable contact 6A is separated from the fixed contact 8A by demagnetizing the operation coil 4 as in the conventional case, an arc 12 is formed between the two contacts. At this time, the fixed contact 8 has a movable contact side near the fixed contact. Is provided with a U-shaped protruding portion 8C, and when the fixed contact is fully opened, the shortest distance between the U-shaped protruding portion and the movable contact is smaller than the shortest distance between the fixed contact and the movable contact. Since it is set small, the legs of the arc 12 on the fixed contact are transferred to the protruding portion 8C of the fixed contactor 8, and the arc 12 becomes like the arc 12A. In this way, the legs of the arc on the fixed contact transfer to the protrusion of the fixed contact,
Wear of fixed contacts is reduced.
【００１０】実施例２．なお、固定接触子８の端子側形
状は図のようにコ字状形状であっても同じ効果を奏す
る。また、上記実施例では、接点をマグネットにより開
閉する開閉器、すなわち電磁接触器に適用した場合の例
についてのみ述べているが、例えば配線用しゃ断器のよ
うな開閉器にも適用できるのはいうまでもない。Embodiment 2. Even if the terminal side shape of the fixed contactor 8 is U-shaped as shown in the figure, the same effect is obtained. Further, in the above-mentioned embodiment, only the case of applying to a switch that opens and closes a contact with a magnet, that is, an electromagnetic contactor is described, but it is also applicable to a switch such as a circuit breaker. There is no end.
【００１１】[0011]
【発明の効果】以上のようにこの発明によれば、固定接
触子の固定接点近傍に可動接点側に突出する突出部を設
けるとともに、固定接点全開時において、上記突出部と
可動接点の間の最短距離を、固定接点と可動接点の間の
最短距離よりも小さくしたことにより、固定接点の消耗
を低減できるという効果がある。As described above, according to the present invention, the projecting portion projecting toward the movable contact is provided in the vicinity of the fixed contact of the fixed contact, and when the fixed contact is fully opened, the projecting portion between the projecting portion and the movable contact is opened. By making the shortest distance smaller than the shortest distance between the fixed contact and the movable contact, it is possible to reduce wear of the fixed contact.
【図１】この発明の一実施例による開閉器の要部側面図
である。FIG. 1 is a side view of a main part of a switch according to an embodiment of the present invention.
【図２】この発明の他の実施例による固定接触子を示す
側面図である。FIG. 2 is a side view showing a fixed contact according to another embodiment of the present invention.
【図３】従来の開閉器を示す部分断面側面図である。FIG. 3 is a partial sectional side view showing a conventional switch.
【図４】図３の固定接触子を示す側面図ａと平面図ｂで
ある。FIG. 4 is a side view a and a plan view b showing the fixed contact of FIG.
【図５】従来の開閉器の動作説明図である。FIG. 5 is an operation explanatory view of a conventional switch.
６ 可動接触子 ６Ａ 可動接点 ８ 固定接触子 ８Ａ 固定接点 ８Ｃ Ｕ字状突出部 6 movable contactor 6A movable contact 8 fixed contactor 8A fixed contact 8C U-shaped protrusion
Claims (2)
の固定接点に対向して配置され上記固定接触子と反対方
向に延びる可動接触子に接合された可動接点とを備えた
ものにおいて、上記固定接触子の固定接点近傍に、可動
接点側に突出する突出部を設けるとともに、固定接点全
開時において、上記突出部と可動接点の間の最短距離
を、固定接点と可動接点の間の最短距離よりも小さく設
定したことを特徴とする開閉器。1. A fixed contact that is joined to a fixed contact, and a movable contact that is joined to a movable contact that faces the fixed contact and extends in a direction opposite to the fixed contact. A protrusion protruding toward the movable contact is provided near the fixed contact of the fixed contact, and when the fixed contact is fully opened, the shortest distance between the protrusion and the movable contact is the shortest distance between the fixed contact and the movable contact. Switch that is set smaller than the distance.
ている請求項１記載の開閉器。2. The switch according to claim 1, wherein the protruding portion of the fixed contact is formed in a U shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3276614A JP2988761B2 (en) | 1991-09-26 | 1991-09-26 | Switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3276614A JP2988761B2 (en) | 1991-09-26 | 1991-09-26 | Switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0589738A true JPH0589738A (en) | 1993-04-09 |
| JP2988761B2 JP2988761B2 (en) | 1999-12-13 |
Family
ID=17571900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3276614A Expired - Fee Related JP2988761B2 (en) | 1991-09-26 | 1991-09-26 | Switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2988761B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779102A (en) * | 2015-03-25 | 2015-07-15 | 敬德强 | Novel high-current reed-type switch contact structure |
-
1991
- 1991-09-26 JP JP3276614A patent/JP2988761B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779102A (en) * | 2015-03-25 | 2015-07-15 | 敬德强 | Novel high-current reed-type switch contact structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2988761B2 (en) | 1999-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |