JPH0339362B2 - - Google Patents
Info
- Publication number
- JPH0339362B2 JPH0339362B2 JP57197060A JP19706082A JPH0339362B2 JP H0339362 B2 JPH0339362 B2 JP H0339362B2 JP 57197060 A JP57197060 A JP 57197060A JP 19706082 A JP19706082 A JP 19706082A JP H0339362 B2 JPH0339362 B2 JP H0339362B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- fixed contact
- extinguishing plate
- movable contact
- metal
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
【発明の詳細な説明】
本発明は電流の開閉を行う開閉器、特にその消
弧機構に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch that switches on and off current, and particularly to an arc extinguishing mechanism thereof.
本発明の主たる適用開閉器として電磁接触器、
や配線用しや断器を挙げることができる。 The main applicable switch of the present invention is an electromagnetic contactor,
Examples include disconnectors for wires and wiring.
まず第１図に従つて従来の電磁接触器の１例に
ついて説明する。なお第１図の電磁接触器は左右
対称である。第１図において、１はプラスチツク
で成形された取付台、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
向設置されこれと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はプラスチツクで形成さ
れ、角窓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。６は上記クロスバー５
の角窓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はこの可動接触子６に設け
られた可動接点、８は上記可動接触子６と対向し
て設けられ、電流の通電をおこなう固定接触子、
８Ａはこの固定接触子８に設けられた固定接点、
８Ｃは同じくこの固定接触子８の端子部を示す。 First, an example of a conventional electromagnetic contactor will be described with reference to FIG. The electromagnetic contactor shown in FIG. 1 is symmetrical. In Fig. 1, 1 is a mounting base made of plastic, 2 is a fixed core laminated with silicon steel plates on this mount, and 3 is a movable core installed opposite the fixed core 2 and also laminated with silicon steel plates. an iron core; 4 is an operating coil that applies a driving force to attract the movable core 3 and fixed core 2 against a tripping spring (not shown); 5 is a crossbar made of plastic and having a square window; A movable iron core 3 is held at its lower end. 6 is the above crossbar 5
6A is a movable contact provided on this movable contact 6, and 8 is provided facing the movable contact 6, and the movable contact is inserted into a corner window and held by a push spring 7. A fixed contact that performs
8A is a fixed contact provided on this fixed contact 8,
Similarly, 8C indicates a terminal portion of this fixed contactor 8.
然して、９は電磁接触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を取付
けるベース、１１は電磁接触子上面を覆うカバー
で、その内部には固定接点８Ａと可動接点６Ａの
間に生じるマーク１２を消弧するための磁性体の
金属消弧板１３を設けており、第２図に金属消弧
板１３と固定接触子８および固定接点８Ａの取付
態様を示している。この金属消弧板１３は固定接
点８Ａを覆つて立設されたコ字状枠として構成さ
れ、固定接触子８との近接部位にはこれを挿通さ
せる切欠部１４が設けられている。 9 is a terminal screw for connecting the electromagnetic contactor main body with an external circuit, 10 is a base on which the fixed contact 8 is attached, and 11 is a cover that covers the top surface of the electromagnetic contact, and inside it is a fixed contact 8A and a movable contact. A metal arc-extinguishing plate 13 made of a magnetic material is provided to extinguish the mark 12 generated between 6A and FIG. There is. The metal arc-extinguishing plate 13 is configured as a U-shaped frame that stands upright over the fixed contact 8A, and is provided with a notch 14 in the vicinity of the fixed contact 8, through which it is inserted.
上記構成を有するため、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も、第１図に示す状態を
占め、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は金属消弧板１３に
より電流零点において消弧され、電流がしや断さ
れることになる。 With the above configuration, in this conventional electromagnetic contactor, when the operation coil 4 is demagnetized, the movable core 3 is separated from the fixed core 2 by a tripping spring (not shown), and the crossbar 5 also returns to the state shown in FIG. When the fixed contact 8A and the movable contact 6A open, an arc 12 is generated between the fixed contact 8A and the movable contact 6A.
However, this arc 12 is extinguished at the current zero point by the metal arc extinguishing plate 13, and the current is briefly interrupted.
この従来の電磁接触器におけるアーク１２の消
弧プロセスを、消弧室断面を示す第３図により更
に詳述すると、可動接点６Ａと固定接点８Ａとの
間に生じたアーク１２は磁性体の金属消弧板１３
に吸引されて伸張アーク１２Ａのように引き伸ば
される。この伸張アーク１２Ａのように引き伸ば
されるとアーク電圧が高くなるので、固定接触子
８と金属消弧板１３との間、および金属消弧板１
３の切欠端１４と可動接点６Ａとの間で絶縁破壊
が発生し、アーク１２Ａは二つのアーク１２Ｂと
１２Ｃに分断され、電流零点において二つのアー
ク１２Ｂと１２Ｃが消弧される。このようなプロ
セスにより消弧する従来の電磁接触器では、金属
消弧板１３の存在によりアークの伸張が制限され
るためアーク電圧が低く、従つて固定接触子８と
金属消弧板１３との間、および金属消弧板１３と
可動接点６Ａとの間で、絶縁破壊が起こり難くな
り、アーク１２が二つのアーク１２Ｂと１２Ｃに
分断され難かつた。このように従来の電磁接器で
はアーク１２の分断が起こり難いため優れたしや
断性能を得られず、さらに金属消弧板１３には電
界集中が生じて熱伝導性に劣るその先端部にアー
ク１２Ｃが発生するので、これらがますますしや
断性能を劣化させる主要原因を形づくることとな
つていた。 The arc 12 extinguishing process in this conventional electromagnetic contactor will be explained in more detail with reference to FIG. 3 showing a cross section of the arc extinguishing chamber. Arc extinguishing plate 13
The arc is drawn into the arc 12A and stretched out like the extension arc 12A. When the arc is stretched like this extended arc 12A, the arc voltage becomes high.
A dielectric breakdown occurs between the cutout end 14 of No. 3 and the movable contact 6A, and the arc 12A is divided into two arcs 12B and 12C, and the two arcs 12B and 12C are extinguished at the current zero point. In a conventional electromagnetic contactor that extinguishes the arc by such a process, the arc voltage is low because the extension of the arc is limited by the presence of the metal arc extinguishing plate 13. Dielectric breakdown was less likely to occur between the metal arc extinguishing plate 13 and the movable contact 6A, and the arc 12 was less likely to be divided into two arcs 12B and 12C. As described above, in conventional electromagnetic welding devices, it is difficult to break the arc 12, so it is not possible to obtain excellent cutting performance.Furthermore, electric field concentration occurs in the metal arc extinguishing plate 13, and the tip of the metal arc extinguishing plate 13 has poor thermal conductivity. As arcs 12C occur, these are increasingly forming the main cause of deterioration of the cutting performance.
本発明は上記の欠点を解消すべく開閉器のしや
断性能を高めることを目的としてなされたもの
で、固定接触子に接合された固定接点と、これに
対向し可動接触子に接合して設けられた可動接点
と、これら接点の開離方向に並行して立設された
磁性体よりなる金属消弧板とを備え、上記金属消
弧板には上記固定接触子との近接部位にＵ字状突
起を形成し、このＵ字状突起を上記可動接点の開
離空間に対向配置させるとともにこのＵ字状突起
の上方にガス流通孔を穿設したことを特徴とする
ものである。 The present invention has been made with the aim of improving the breaking performance of a switch in order to eliminate the above-mentioned drawbacks. The metal arc-extinguishing plate is provided with a movable contact provided and a metal arc-extinguishing plate made of a magnetic material that is erected in parallel with the opening direction of these contacts, and the metal arc-extinguishing plate has a U in the vicinity of the fixed contact. The device is characterized in that a U-shaped protrusion is formed, this U-shaped protrusion is placed opposite to the separation space of the movable contact, and a gas flow hole is provided above the U-shaped protrusion.
以下、第４図ないし第７図に示す実施例につい
て本発明を説明すると、この実施例の開閉器は金
属消弧板を除けば上記従来例と同様であるので、
金属消弧板１３についてのみその斜視図を第４図
に示している。 The present invention will be described below with reference to the embodiment shown in FIGS. 4 to 7. The switch of this embodiment is the same as the conventional example described above except for the metal arc-extinguishing plate.
A perspective view of only the metal arc-extinguishing plate 13 is shown in FIG.
この第４図に示すように金属消弧板１３には、
その固定接触子８との近接部位に設けられた切欠
端１４に、舌状延長部を屈曲させてＵ字状の突起
１３Ａが設けられており、かつこの突起１３Ａの
上部にガス流通用の穴１３Ｂが穿設されている点
が上記従来のものと異つている。この金属消弧板
１３を用いた消弧室の縦断面図が第５図と第６図
とに示されているが、同図によりアーク１２が固
定接点８Ａと可動接点６Ａの間に生じてから消弧
されるまでのプロセスを説明すると、固定接点８
Ａと可動接点６Ａの間に生じたアーク１２は先
ず、磁性体の金属消弧板１３に吸引されてアーク
１２Ｄの状態を経由し、次いでアーク１２Ｅのよ
うに金属消弧板１３のＵ字状突起１３Ａに沿つて
伸張される。このときアーク電圧が高められると
ともに、電子や電離された陰イオンを含むアーク
ドガスがガス流通用孔１３Ｂ内を通過するので、
この孔１３Ｂの近辺で絶縁破壊が生じ、この直後
アーク１２Ｅは二つのアーク１２Ｆと１２Ｇに分
断される。このようにアーク１２が二つに分断さ
れると、金属消弧板１３のＵ字状突起部１３Ａに
電流が流れるので、分断されたアーク１２Ｆと１
２Ｇは金属消弧板１３のＵ字状突起１３Ａを流れ
る電流が作る磁界によつて一層駆動され、第６図
のアーク１２Ｈと１２Ｉのように外方へ伸長され
て電流零点において消弧され、電流がしや断され
る。 As shown in FIG. 4, the metal arc-extinguishing plate 13 has
A U-shaped protrusion 13A is provided at the notch end 14 provided in the vicinity of the fixed contact 8 by bending the tongue-like extension part, and a hole for gas circulation is provided in the upper part of the protrusion 13A. It differs from the conventional one in that 13B is drilled. A vertical cross-sectional view of an arc extinguishing chamber using this metal arc extinguishing plate 13 is shown in FIGS. To explain the process from arc extinguishing, fixed contact 8
The arc 12 generated between A and the movable contact 6A is first attracted to the magnetic metal arc extinguishing plate 13 and passes through the state of arc 12D, and then the U-shaped metal arc extinguishing plate 13 as shown in the arc 12E. It is extended along the protrusion 13A. At this time, the arc voltage is increased and the arced gas containing electrons and ionized anions passes through the gas distribution hole 13B.
Dielectric breakdown occurs near this hole 13B, and immediately after this, the arc 12E is divided into two arcs 12F and 12G. When the arc 12 is divided into two in this way, a current flows through the U-shaped protrusion 13A of the metal arc extinguishing plate 13, so that the divided arc 12F and the
2G is further driven by the magnetic field created by the current flowing through the U-shaped protrusion 13A of the metal arc-extinguishing plate 13, extends outward like arcs 12H and 12I in FIG. 6, and is extinguished at the current zero point. The current is then cut off.
以上のようにして消弧が行われるため、本発明
が適用された電磁接触器では、上述のようにアー
ク１２は金属消弧板１３のＵ字状突起１３Ａの上
方の孔１３Ｂの近傍で絶縁破壊を生じさせ、その
直後、アークが二つに分断され、かつ金属消弧板
１３のＵ字状突起１３Ａを流れる電流が作る磁界
によつて金属消弧板１３上を高速度で駆動され、
これを迅速に消弧させることができる。しかもこ
のとき第３図に示す従来例のもののように金属消
弧板１３の電界集中が生ぜず、また熱伝導性が劣
る先端部にアークが発生することもないので極め
て優れたしや断性能を発揮させることができる。
特にガス流通孔１３Ｂの存在により、この孔１３
Ｂの近傍で絶縁破壊が容易に生じ、これによりア
ーク時間が短くなる利点がある。 Since the arc is extinguished as described above, in the electromagnetic contactor to which the present invention is applied, the arc 12 is insulated near the hole 13B above the U-shaped protrusion 13A of the metal arc extinguishing plate 13, as described above. Immediately after causing destruction, the arc is split into two, and is driven at high speed on the metal arc extinguishing plate 13 by the magnetic field created by the current flowing through the U-shaped protrusion 13A of the metal arc extinguishing plate 13,
This arc can be quickly extinguished. Moreover, unlike the conventional example shown in FIG. 3, there is no electric field concentration on the metal arc-extinguishing plate 13, and no arc is generated at the tip, which has poor thermal conductivity, resulting in extremely excellent arc-breaking performance. can be demonstrated.
In particular, due to the presence of the gas flow hole 13B, this hole 13
Dielectric breakdown easily occurs near B, which has the advantage of shortening the arc time.
なお、本発明は第７図のような異なつた形状を
有する固定接触子８に対しても同様な効果を期待
できることは言うまでもない。 It goes without saying that the present invention can be expected to have similar effects on fixed contacts 8 having different shapes as shown in FIG.
また、叙上の説明においては接点をマグネツト
により開閉する開閉器、すなわち電磁接触器に本
発明を適用した場合の例についてのみ述べている
が、これを例えば配線用しや断器のような他の開
閉器にも適用できるのは明白である。 In addition, in the above description, only an example is described in which the present invention is applied to a switch that opens and closes the contacts using a magnet, that is, an electromagnetic contactor. It is obvious that this method can also be applied to switches.
以上述べたように、本発明においては、金属消
弧板の固定接触子との近接部位に設けられた切欠
端にＵ字状突起を形成しこのＵ字状突起の突出端
を固定接点と可動接点の開離空間に向け、かつＵ
字状突起の上方にガス流通孔を設けることによ
り、開閉器のしや断性能を格段に向上させること
のできる効果がある。 As described above, in the present invention, a U-shaped protrusion is formed at the cutout end of the metal arc-extinguishing plate in the vicinity of the fixed contact, and the protruding end of this U-shaped protrusion is movable with the fixed contact. towards the open space of the contacts, and
Providing the gas flow hole above the letter-shaped projection has the effect of significantly improving the shearing performance of the switch.
第１図は従来の電磁接触器の部分断面図、第２
図は第１図のものの消弧室を示す要部拡大図、第
３図は従来の電磁接触器における消弧動作を説明
するための説明図、第４図は本発明の一実施例に
係る消弧板を示す斜視図、第５図と第６図は本発
明実施例の消弧動作を示す各説明図、第７図は本
発明の他の実施例の要部を示す第６図と同様の説
明図である。
６：可動接触子、６Ａ：可動接点、８：固定接
触子、８Ａ：固定接点、１２：アーク、１３：金
属消弧板、１３Ａ：Ｕ字状突起、１３Ｂ：ガス流
通孔、なお、図中、同一符号は同一または相当部
分を示す。
Figure 1 is a partial sectional view of a conventional magnetic contactor, Figure 2 is a partial cross-sectional view of a conventional magnetic contactor.
The figure is an enlarged view of the main part showing the arc extinguishing chamber of the one in Figure 1, Figure 3 is an explanatory diagram for explaining the arc extinguishing operation in a conventional electromagnetic contactor, and Figure 4 is according to an embodiment of the present invention. FIG. 5 and FIG. 6 are explanatory diagrams showing the arc extinguishing operation of the embodiment of the present invention, and FIG. 7 is a perspective view showing the arc extinguishing plate, and FIG. It is a similar explanatory diagram. 6: Movable contact, 6A: Movable contact, 8: Fixed contact, 8A: Fixed contact, 12: Arc, 13: Metal arc-extinguishing plate, 13A: U-shaped protrusion, 13B: Gas flow hole. , the same reference numerals indicate the same or equivalent parts.
Claims (1)
対向し可動接触子に接合して設けられた可動接点
と、これら接点の開離方向に並行して立設された
磁性体よりなる金属消弧板とを備え、上記金属消
弧板には上記固定接触子との近接部位に設けられ
た切欠端にＵ字状突起を形成し、このＵ字状突起
を上記可動接点の開離空間に対向突設させるとと
もに、このＵ字状突起の上方にガス流通孔を穿設
したことを特徴とする開閉器。1 A fixed contact joined to a fixed contact, a movable contact opposite to the fixed contact joined to a movable contact, and a metal extinguisher made of a magnetic material erected in parallel to the opening direction of these contacts. an arc plate, the metal arc-extinguishing plate has a U-shaped protrusion formed at a notch end provided in the vicinity of the fixed contact, and the U-shaped protrusion is provided in the opening space of the movable contact. A switch characterized in that the U-shaped protrusions are oppositely protruded and a gas flow hole is provided above the U-shaped protrusions.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19706082A JPS5987716A (en) | 1982-11-10 | 1982-11-10 | Switch |
| EP83111132A EP0117288B1 (en) | 1982-11-10 | 1983-11-08 | Switch with arc-extinguishing means |
| DE8383111132T DE3375857D1 (en) | 1982-11-10 | 1983-11-08 | Switch with arc-extinguishing means |
| US06/550,675 US4539451A (en) | 1982-11-10 | 1983-11-10 | Switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19706082A JPS5987716A (en) | 1982-11-10 | 1982-11-10 | Switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5987716A JPS5987716A (en) | 1984-05-21 |
| JPH0339362B2 true JPH0339362B2 (en) | 1991-06-13 |
Family
ID=16368043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19706082A Granted JPS5987716A (en) | 1982-11-10 | 1982-11-10 | Switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5987716A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59103230A (en) * | 1982-12-03 | 1984-06-14 | 三菱電機株式会社 | Switch |
| JPH0414836Y2 (en) * | 1985-04-23 | 1992-04-03 | ||
| JPS61248323A (en) * | 1985-04-24 | 1986-11-05 | 松下電工株式会社 | Arc extinguisher |
| JPH04357633A (en) * | 1991-01-10 | 1992-12-10 | Matsushita Electric Works Ltd | Exhausting structure for contact switch device |
-
1982
- 1982-11-10 JP JP19706082A patent/JPS5987716A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5987716A (en) | 1984-05-21 |
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| JPH0381252B2 (en) | ||
| JPS5987715A (en) | Switch | |
| JPH0656730B2 (en) | Switch |