JP2542455B2 - Electromagnet device - Google Patents
Electromagnet deviceInfo
- Publication number
- JP2542455B2 JP2542455B2 JP2215187A JP21518790A JP2542455B2 JP 2542455 B2 JP2542455 B2 JP 2542455B2 JP 2215187 A JP2215187 A JP 2215187A JP 21518790 A JP21518790 A JP 21518790A JP 2542455 B2 JP2542455 B2 JP 2542455B2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- yoke
- exciting coil
- insertion hole
- peripheral surface
- 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
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、漏電ブレーカに用いられる電磁石装置に関
するものである。TECHNICAL FIELD The present invention relates to an electromagnet device used for an earth leakage breaker.
［従来の技術］ 漏電ブレーカに用いられる従来の電磁石装置として
は、第７図及び第８図に示すものがあり、この電磁石装
置は、筒状の励磁コイル１と、この励磁コイル１を囲む
ように配設され一方の脚片2aに励磁コイル１の内孔1aに
対応して角型のプランジャ挿通孔３が穿設されたコ字型
のヨーク２と、このヨーク２のプランジャ挿通孔３を介
して励磁コイル１の内孔1aに一端が挿入され他端にアク
チュエータ部５が形成されたプランジャ４と、プランジ
ャ４を軸方向のアクチュエータ部５側に付勢する復帰ば
ね６とからなり、プランジャ４の外面とヨーク２のプラ
ンジャ挿入孔３の内面との間の摺動面積を小さくして、
プランジャ４がスムーズに摺動するように、プランジャ
４を磁性体板を折曲して軸方向に直交する断面がヨーク
２の中央片2b側が開口するコ字型に形成してある。な
お、このプランジャ４の両側片の中央部にはストッパ部
4a′としての段部を形成し、このストッパ部4a′をプラ
ンジャ挿通孔３下方のヨーク２の内周面に当接させて、
プランジャ４の抜け止めを施すようにしていた。[Prior Art] As a conventional electromagnet device used for an earth leakage breaker, there is a device shown in FIG. 7 and FIG. 8. This electromagnet device includes a cylindrical exciting coil 1 and an exciting coil 1 surrounding the exciting coil 1. A square U-shaped yoke 2 having a square plunger insertion hole 3 corresponding to the inner hole 1a of the exciting coil 1 on one leg 2a, and the plunger insertion hole 3 of the yoke 2. A plunger 4 having one end inserted into the inner hole 1a of the exciting coil 1 and an actuator portion 5 formed at the other end, and a return spring 6 for urging the plunger 4 toward the actuator portion 5 in the axial direction. The sliding area between the outer surface of 4 and the inner surface of the plunger insertion hole 3 of the yoke 2 is reduced,
In order for the plunger 4 to slide smoothly, the magnetic plate is bent, and the cross section orthogonal to the axial direction is formed in a U shape in which the side of the central piece 2b of the yoke 2 is open. In addition, stopper parts are provided at the center of both side pieces of the plunger 4.
A step portion as 4a 'is formed, and the stopper portion 4a' is brought into contact with the inner peripheral surface of the yoke 2 below the plunger insertion hole 3,
It was designed to prevent the plunger 4 from coming off.
［発明が解決しようとする課題］ しかしながら、上述のようにプランジャ４の抜け止め
を施すストッパ4a′を段部にすると、ストッパ部4a′と
プランジャ挿通孔３下方のヨーク２の内周面との間の接
触面積が大きくなり、このためプランジャ４とヨーク２
との吸着力が強くなって、励磁コイル１内にプランジャ
４を引き込むために励磁コイル１に大きな励磁電流を流
さなければならず、また動作電圧もばらつきやすくなる
という問題があった。[Problems to be Solved by the Invention] However, when the stopper 4a 'for preventing the plunger 4 from coming off is formed as a stepped portion as described above, the stopper portion 4a' and the inner peripheral surface of the yoke 2 below the plunger insertion hole 3 are separated. The contact area between them is large, which results in the plunger 4 and the yoke 2
There is a problem in that a large exciting current has to be passed through the exciting coil 1 in order to draw the plunger 4 into the exciting coil 1, and the operating voltage tends to vary.
本発明は上記の点に鑑みて為されたものであり、その
目的とするところは、励磁コイルの消費電流を低減でき
ると共に、動作電圧のばらつきを小さくすることができ
る電磁石装置を提供することにある。The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnet device capable of reducing the consumption current of an exciting coil and reducing variations in operating voltage. is there.
［課題を解決するための手段］ 上記目的を達成するために、本発明はプランジャのス
トッパ部を、プランジャ挿通孔の下方のヨークの内周面
側ほど該内周面と平行な垂直断面の面積が小さくなる形
状に形成してある。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a stopper portion of a plunger having an area of a vertical section parallel to the inner peripheral surface of the yoke below the plunger insertion hole. Is formed in a small size.
［作 用］ 本発明は上述のように構成することにより、プランジ
ャのストッパ部とプランジャ挿通孔下方のヨークの内周
面との接触面積を小さくして、プランジャとヨークとの
吸着力を弱くし、これにより励磁コイルの励磁電流を小
さくてもプランジャを励磁コイル内に引き込むことがで
きるようにしたものである。[Operation] With the configuration of the present invention as described above, the contact area between the stopper portion of the plunger and the inner peripheral surface of the yoke below the plunger insertion hole is reduced to weaken the attraction force between the plunger and the yoke. Thus, the plunger can be drawn into the exciting coil even if the exciting current of the exciting coil is small.
［実施例］ 第１図乃至第６図に本発明の一実施例を示す。本実施
例の電磁石装置も、第２図あるいは第４図に示すよう
に、従来例の電磁石装置と同様に、筒状の励磁コイル１
と、この励磁コイル１を囲むように配設され一方の脚片
2aに励磁コイル１の内孔1aに対応して角型のプランジャ
挿通孔３が穿設されたコ字型のヨーク２と、このヨーク
２のプランジャ挿通孔３を介して励磁コイル１の内孔1a
に一端が挿入され他端にアクチュエータ部５が形成され
たプランジャ４と、プランジャ４を軸方向のアクチュエ
ータ部５側に付勢する復帰ばね６とからなり、プランジ
ャ４を磁性体板を折曲して軸方向に直交する断面がヨー
ク２の中央片2b側が開口するコ字型に形成したものであ
る。但し、本実施例の場合には、第１図に示すように、
プランジャ４のストッパ部4aを、プランジャ挿通孔３下
方のヨーク２の内周面との接触面積が小さくなるように
くさび状に形成してある点が従来例の電磁石装置と異な
る。つまり本実施例では、ストッパ部4aを、プランジャ
挿通孔３下方のヨーク２の内周面に線接触する形状に形
成して前記接触面積を従来よりも小さくしてある。な
お、本実施例ではプランジャ４の両側片の夫々のストッ
パ部4aをくさび状に形成してあるが、いずれか一方だけ
をくさび状にしても良いことは言うまでもない。[Embodiment] FIGS. 1 to 6 show an embodiment of the present invention. As shown in FIG. 2 or FIG. 4, the electromagnet device of this embodiment also has a cylindrical exciting coil 1 as in the conventional electromagnet device.
And one leg piece arranged so as to surround the exciting coil 1.
A square U-shaped yoke 2 having a square plunger insertion hole 3 corresponding to the inner hole 1a of the excitation coil 1 and an inner hole of the excitation coil 1 through the plunger insertion hole 3 of the yoke 2 1a
A plunger 4 having one end inserted into and an actuator portion 5 formed at the other end, and a return spring 6 for urging the plunger 4 toward the actuator portion 5 in the axial direction. The plunger 4 is formed by bending a magnetic plate. The cross section perpendicular to the axial direction is formed in a U shape in which the side of the central piece 2b of the yoke 2 is open. However, in the case of this embodiment, as shown in FIG.
The stopper 4a of the plunger 4 differs from the conventional electromagnet device in that it is formed in a wedge shape so that the contact area with the inner peripheral surface of the yoke 2 below the plunger insertion hole 3 becomes small. That is, in this embodiment, the stopper portion 4a is formed in a shape that comes into line contact with the inner peripheral surface of the yoke 2 below the plunger insertion hole 3, and the contact area is made smaller than before. In this embodiment, the stopper portions 4a on both side pieces of the plunger 4 are formed in a wedge shape, but it goes without saying that only one of them may be formed in a wedge shape.
ところで、ストッパ部4aの形状は、くさび状の形状に
限定するものではなく、プランジャ挿通孔３の下方のヨ
ーク２の内周面側ほど該内周面と平行な垂直断面の面積
が小さくなる形状であればよい。By the way, the shape of the stopper portion 4a is not limited to the wedge shape, and the area of the vertical cross section parallel to the inner peripheral surface becomes smaller toward the inner peripheral surface side of the yoke 2 below the plunger insertion hole 3. If
ところで、本実施例の電磁石装置では漏電表示機構を
組み込んであり、この漏電表示機構を、上端に表示釦10
が設けられプランジャ４が挿通される角孔11を有する表
示体12と、表示体12を上方に付勢するコイルばね13と、
プランジャ４に形成された切欠14とで構成してあり、プ
ランジャ４が左方に駆動されたとき、表示体12の角孔11
の下縁が切欠14に嵌まり込んでコイルばね13にて表示体
12を上方に駆動し、表示釦10を突出することにより漏電
発生（漏電遮断用の電磁石装置の作動）を表示するよう
にしてある。By the way, in the electromagnet device of the present embodiment, a leakage display mechanism is incorporated, and this leakage display mechanism is attached to the upper end of the display button 10
A display body 12 having a square hole 11 through which the plunger 4 is inserted, and a coil spring 13 for urging the display body 12 upward.
When the plunger 4 is driven to the left, the square hole 11 of the display body 12 is formed by the notch 14 formed in the plunger 4.
The lower edge fits into the notch 14 and the coil spring 13
By driving 12 upward and projecting the display button 10, the occurrence of electric leakage (operation of the electromagnet device for cutting off electric leakage) is displayed.
本実施例の電磁石装置の要部の組立は、まず励磁コイ
ル１の内孔1aとヨーク２のプランジャ挿通孔３とを連通
させる状態にして励磁コイル１をヨーク２内に収め、こ
の状態でプランジャ４をプランジャ挿通孔３及び内孔1a
を通して挿入し、その後励磁コイル１をヨーク２内に完
全に収めるという手順で行う。このようにして組み立て
ると、プランジャ４のストッパ部4aによりプランジャ４
に抜け止めが施される。To assemble the essential parts of the electromagnet device of this embodiment, first, the inner hole 1a of the exciting coil 1 and the plunger insertion hole 3 of the yoke 2 are made to communicate with each other, and the exciting coil 1 is housed in the yoke 2. 4 is the plunger insertion hole 3 and the inner hole 1a
Through, and then the exciting coil 1 is completely housed in the yoke 2. When assembled in this way, the stopper 4a of the plunger 4 prevents the plunger 4 from
The lock is applied to the.
以下、実施例の動作について説明する。いま、励磁コ
イル１に励磁電流が流れると、ヨーク２とプランジャ４
とで磁気回路が形成され、プランジャ４を励磁コイル１
の内孔1aに引き込む吸引力が生じ、プランジャ４が復帰
ばね６のばね力に抗して左方に駆動される。この際に本
実施例の場合には、ストッパ部4aとプランジャ挿通孔３
下方のヨーク２の内周面との接触面積を小さくしてある
ので、大きな励磁電流を励磁コイル１に流さなくてもプ
ランジャ４を引き込むことができ、励磁コイル１の消費
電流を小さくでき、このため電磁石装置を小型化するこ
とができる。しかも、このようにストッパ部4aとプラン
ジャ挿通孔３下方のヨーク２の内周面との吸着力を弱め
ると、この吸着力が電磁石装置の動作電圧に与える影響
が小さくなり、動作電圧のばらつきを小さくすることが
できる利点もある。The operation of the embodiment will be described below. Now, when an exciting current flows through the exciting coil 1, the yoke 2 and the plunger 4
A magnetic circuit is formed by and the plunger 4 is excited by the exciting coil 1
A suction force is drawn into the inner hole 1a, and the plunger 4 is driven leftward against the spring force of the return spring 6. At this time, in the case of the present embodiment, the stopper portion 4a and the plunger insertion hole 3
Since the contact area with the inner peripheral surface of the lower yoke 2 is made small, the plunger 4 can be drawn in without sending a large exciting current to the exciting coil 1, and the current consumption of the exciting coil 1 can be made small. Therefore, the electromagnet device can be downsized. Moreover, when the attraction force between the stopper portion 4a and the inner peripheral surface of the yoke 2 below the plunger insertion hole 3 is weakened in this way, the influence of this attraction force on the operating voltage of the electromagnet device is reduced, and the variation of the operating voltage is reduced. There is also an advantage that it can be made smaller.
この本実施例の電磁石装置を漏電ブレーカに組み込
み、漏電検出信号によって励磁コイル１に励磁電流を流
すようにした場合には、プランジャ４の他端に形成され
ているアクチュエータ部５によって漏電ブレーカのトリ
ップ機構のラッチを引き外し、電路遮断用接点をオフさ
せることになる。When the electromagnet device according to the present embodiment is incorporated in a leakage breaker and an exciting current is caused to flow through the exciting coil 1 by a leakage detection signal, the actuator 5 formed at the other end of the plunger 4 trips the leakage breaker. The latch of the mechanism is pulled off, and the contact for breaking the circuit is turned off.
そして、励磁コイル１の励磁電流が流れなくなった状
態で、表示釦10を押し込むと、プランジャ４の切欠14に
表示体12が嵌合した状態を解除することができ、このた
め復帰ばね６のばね力でプランジャ４はアクチュエータ
部５側に駆動されて、漏電検出状態に復帰する。この
際、プランジャ４は、ストッパ部4aがプランジャ挿通孔
３下方のヨーク２の内周面へ当接する位置まで復帰す
る。Then, when the display button 10 is pushed in a state where the exciting current of the exciting coil 1 stops flowing, the state where the display body 12 is fitted in the notch 14 of the plunger 4 can be released, and therefore the spring of the return spring 6 is released. The force causes the plunger 4 to be driven to the actuator 5 side, and returns to the leakage detection state. At this time, the plunger 4 returns to a position where the stopper portion 4a comes into contact with the inner peripheral surface of the yoke 2 below the plunger insertion hole 3.
［発明の効果］ 本発明は上述のように、プランジャのストッパ部を、
プランジャ挿通孔の下方のヨークの内周面側ほど該内周
面と平行な垂直断面の面積が小さくなる形状に形成して
あるので、プランジャのストッパ部とプランジャ挿通孔
下方のヨークの内周面との接触面積が従来よりも小さく
なり、プランジャとヨークとの吸着力を弱くでき、この
ため励磁コイルの励磁電流を小さくしてもプランジャを
励磁コイル内に引き込むことができ、しかもストッパ部
とプランジャ挿通孔下方のヨークの内周面との吸着力を
弱めると、この吸着力が電磁石装置の動作電圧に与える
影響が小さくなり、従って動作電圧のばらつきを小さく
することができる。[Effect of the Invention] As described above, the present invention includes the stopper portion of the plunger,
Since the area of the vertical section parallel to the inner peripheral surface of the yoke below the plunger insertion hole is smaller, the stopper portion of the plunger and the inner peripheral surface of the yoke below the plunger insertion hole are formed. The contact area with the magnet is smaller than before, and the attractive force between the plunger and the yoke can be weakened. Therefore, even if the exciting current of the exciting coil is reduced, the plunger can be pulled into the exciting coil, and the stopper and the plunger If the attraction force with the inner peripheral surface of the yoke below the insertion hole is weakened, the influence of this attraction force on the operating voltage of the electromagnet device is reduced, and therefore the variation of the operating voltage can be reduced.
第１図は本発明の一実施例のプランジャの斜視図、第２
図は同上を備える電磁石装置の断面図、第３図は同上の
要部の断面図、第４図は同上の平面図、第５図は同上の
側面図、第６図は同上の破断図を異ならせた断面図、第
７図は従来例の電磁石装置の断面図、第８図は同上の破
断図を異ならせた断面図である。 １は励磁コイル、２はヨーク、2aは脚片、2bは中央片、
３はプランジャ挿通孔、４はプランジャ、4aはストッパ
部、５はアクチュエータ部、６は復帰ばねである。FIG. 1 is a perspective view of a plunger according to an embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view of an electromagnet device including the same as above, FIG. 3 is a cross-sectional view of a main portion of the same as above, FIG. 4 is a plan view of the same as above, FIG. 5 is a side view of the same as above, and FIG. Different sectional views, FIG. 7 is a sectional view of an electromagnet device of a conventional example, and FIG. 8 is a sectional view showing the same broken view. 1 is an exciting coil, 2 is a yoke, 2a is a leg piece, 2b is a center piece,
3 is a plunger insertion hole, 4 is a plunger, 4a is a stopper part, 5 is an actuator part, and 6 is a return spring.
Claims (1)
むように配設され一方の脚片に励磁コイルの内孔に対応
して角型のプランジャ挿通孔が穿設されたコ字型のヨー
クと、このヨークのプランジャ挿通孔を介して励磁コイ
ルの内孔に一端が挿入され他端にアクチュエータ部が形
成されたプランジャと、プランジャを軸方向のアクチュ
エータ部側に付勢する復帰ばねとからなり、上記プラン
ジャを磁性体板を折曲して軸方向に直交する断面がヨー
クの中央片側が開口するコ字型に形成し、このプランジ
ャにプランジャ挿通孔の下方のヨークの内周面に当接し
てプランジャの抜け止めを施すストッパ部を形成した電
磁石装置において、上記プランジャのストッパ部を、プ
ランジャ挿通孔の下方のヨークの内周面側ほど該内周面
と平行な垂直断面の面積が小さくなる形状に形成して成
ることを特徴とする電磁石装置。1. A U-shaped cylindrical exciting coil, and a square plunger insertion hole provided in one leg so as to surround the exciting coil and corresponding to an inner hole of the exciting coil. , A plunger having one end inserted into the inner hole of the exciting coil through the plunger insertion hole of the yoke and an actuator portion formed at the other end, and a return spring for urging the plunger toward the actuator portion in the axial direction. The above-mentioned plunger is formed by bending a magnetic plate into a U-shape with a cross section orthogonal to the axial direction opening at one side of the center of the yoke, and this plunger is formed on the inner peripheral surface of the yoke below the plunger insertion hole. In an electromagnet device in which a stopper portion is formed that abuts to prevent the plunger from coming off, the stopper portion of the plunger is a vertical section parallel to the inner peripheral surface of the yoke below the plunger insertion hole. Electromagnet apparatus characterized by comprising forming a shape area becomes smaller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215187A JP2542455B2 (en) | 1990-08-14 | 1990-08-14 | Electromagnet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215187A JP2542455B2 (en) | 1990-08-14 | 1990-08-14 | Electromagnet device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0498728A JPH0498728A (en) | 1992-03-31 |
| JP2542455B2 true JP2542455B2 (en) | 1996-10-09 |
Family
ID=16668120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2215187A Expired - Lifetime JP2542455B2 (en) | 1990-08-14 | 1990-08-14 | Electromagnet device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2542455B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101700774B1 (en) * | 2015-03-24 | 2017-01-31 | 엘에스산전 주식회사 | Magnetic contactor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01113308A (en) * | 1987-10-27 | 1989-05-02 | Daicel Chem Ind Ltd | Nematode repellent |
-
1990
- 1990-08-14 JP JP2215187A patent/JP2542455B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0498728A (en) | 1992-03-31 |
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| JPH0883557A (en) | Electromagnetic device |
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