JP2505011B2 - Electromagnetic device of circuit breaker - Google Patents
Electromagnetic device of circuit breakerInfo
- Publication number
- JP2505011B2 JP2505011B2 JP32632587A JP32632587A JP2505011B2 JP 2505011 B2 JP2505011 B2 JP 2505011B2 JP 32632587 A JP32632587 A JP 32632587A JP 32632587 A JP32632587 A JP 32632587A JP 2505011 B2 JP2505011 B2 JP 2505011B2
- Authority
- JP
- Japan
- Prior art keywords
- piece
- movable iron
- yoke
- iron piece
- circuit breaker
- 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
Landscapes
- Breakers (AREA)
Description
【発明の詳細な説明】 ［技術分野］ 本発明は、回路遮断器の電磁装置に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to an electromagnetic device of a circuit breaker.
［背景技術］ 従来、この種の回路遮断器の電磁装置としては、励磁
コイルが巻装された鉄芯の一端をＬ字型のヨークの水平
片に結合してコ字型の磁気回路を形成し、一端がヨーク
の垂直片の先端に回動自在に取着され自由端が回路遮断
器の開閉装置のラッチ引き外しレバーに係合自在な可動
鉄片の中央部を鉄芯の他端に吸着自在にし、可動鉄片と
ヨークとの間に復帰ばねを介装して形成したものがあっ
た。ところで、このような回路遮断器の電磁装置におい
て、可動鉄片の回動枢支部は、第６図に示すように、ヨ
ーク３の垂直片3bの先端に設けられた係合突起5aを可動
鉄片４の一端部に穿設された係合孔5aに挿通して形成さ
れており、係合突起5aの先端部に設けられた引っ掛け部
8aと可動鉄片４の自由端部に設けられた引っ掛け部8bと
の間にコイルばねよりなる復帰ばね７を介装していた。
しかしながら、このような従来例にあっては、係合孔5b
の角部が係合突起5aの側面に復帰ばね７のばね力によっ
て圧接された状態となっているので、振動や衝撃によっ
て可動鉄片４が浮き上がった場合には、可動鉄片４がも
との位置に復帰しなくなって浮き上がった位置で回動が
行なわれ、可動鉄片の可動位置の変化により電磁装置の
感動特性（過電流検出特性）が変化してしまうという問
題があった。BACKGROUND ART Conventionally, as an electromagnetic device of this type of circuit breaker, one end of an iron core around which an exciting coil is wound is coupled to a horizontal piece of an L-shaped yoke to form a U-shaped magnetic circuit. Then, one end of the movable iron piece is attached to the other end of the iron core so that one end is rotatably attached to the tip of the vertical piece of the yoke and the free end is engageable with the latch release lever of the circuit breaker switchgear. In some cases, a return spring was interposed between the movable iron piece and the yoke so as to be free. By the way, in the electromagnetic device of such a circuit breaker, as shown in FIG. 6, the rotary pivot portion of the movable iron piece has the engaging projection 5a provided at the tip of the vertical piece 3b of the yoke 3 and the movable iron piece 4a. The hooking portion formed at the tip of the engaging projection 5a is formed by being inserted into the engaging hole 5a formed at one end of the
The return spring 7 made of a coil spring is interposed between the moving portion 8a and the hooking portion 8b provided at the free end of the movable iron piece 4.
However, in such a conventional example, the engagement hole 5b
Since the corner portions of the movable iron piece 4 are pressed against the side surface of the engaging projection 5a by the spring force of the return spring 7, when the movable iron piece 4 is lifted by vibration or impact, the movable iron piece 4 is moved to its original position. However, there is a problem in that rotation is performed at a position where the movable iron piece does not recover and the movable iron piece moves, and the moving characteristic of the movable iron piece changes the moving characteristic (overcurrent detection characteristic) of the electromagnetic device.
［発明の目的］ 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、振動や衝撃による可動鉄片の浮き
上がりがあっても、可動鉄片の回動位置が変化すること
がなく、感動特性が変化することがない回路遮断器の電
磁装置を提供することにある。[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to change the rotational position of a movable iron piece even if the movable iron piece is lifted up by vibration or impact. It is an object of the present invention to provide an electromagnetic device of a circuit breaker that does not change the emotional characteristics.
［発明の開示］ （構 成） 本発明は、励磁コイルが巻装された鉄芯の一端をＬ字
型のヨークの水平片に結合してコ字型の磁気回路を形成
し、一端がヨークの垂直片の先端に回動自在に取着され
自由端が回路遮断器の開閉装置のラッチ引き外しレバー
に係合自在な可動鉄片の中央部を鉄芯の他端に吸着自在
にし、可動鉄片とヨークとの間に復帰ばねを介装して成
る回路遮断器の電磁装置において、ヨークの垂直片の先
端に係合突起を設けるとともに、可動鉄片の一端部に穿
設した係合孔に上記係合突起を挿通し、係合突起の先端
部に設けられた引っ掛け部と可動鉄片の自由端部に設け
られた引っ掛け部との間にコイルばねよりなる復帰ばね
を介装し、可動鉄片の係合孔の両側に適当な曲率をもっ
て折り曲げられた折り曲げ部を設け、上記折り曲げ部の
丸角部をヨークの垂直片内面に当接させることにより、
振動や衝撃による可動鉄片の浮き上がりがあっても、可
動鉄片の回動位置が変化することがなく、感動特性が変
化することがない回路遮断器の電磁装置を提供するもの
である。DISCLOSURE OF THE INVENTION (Structure) According to the present invention, one end of an iron core around which an exciting coil is wound is connected to a horizontal piece of an L-shaped yoke to form a U-shaped magnetic circuit, and one end of the yoke is formed. The movable iron piece is rotatably attached to the tip of the vertical piece, and the free end of the movable iron piece is engageable with the other end of the iron core. In an electromagnetic device of a circuit breaker in which a return spring is interposed between a yoke and a yoke, an engaging protrusion is provided at the tip of a vertical piece of the yoke, and the engaging hole formed at one end of the movable iron piece has the above-mentioned structure. The engaging protrusion is inserted, and a return spring consisting of a coil spring is interposed between the hooking portion provided at the tip of the engaging protrusion and the hooking portion provided at the free end of the movable iron piece. Providing bent parts with appropriate curvature on both sides of the engaging hole, Round angle portions of the parts by abutting the vertical piece inner surface of the yoke,
Provided is an electromagnetic device of a circuit breaker in which the moving position of a movable iron piece does not change even if the movable iron piece floats up due to vibration or shock, and the moving characteristic does not change.
（実施例） 第１図乃至第５図は本発明一実施例を示すもので、本
発明に係る電磁装置が組み込まれる回路遮断器は、第１
図に示すように、ボデイ12aおよびカバー12bよりなるハ
ウジング12内にトリップ機構を具備した開閉装置Ａと、
電磁装置Ｂとが収納され、入出力端子（電源側、負荷側
端子）13a,13b間に過大な負荷電流が流れたとき電磁装
置Ｂが動作し、電磁装置Ｂの可動鉄片４の先端で開閉装
置Ａのトリップ機構のラッチ引き外しレバー14を下方に
押圧してトリップ動作が行なわれ、負荷回路に挿入され
ている開閉接点（図示せず）が開放されるようになって
いる。なお、開閉装置11の接点開閉操作およびトリップ
状態の解除はハンドル15によって行なわれるようになっ
ている。ところで、電磁装置Ｂは、励磁コイル１が巻装
された鉄芯２の一端をＬ字型のヨーク３の水平片3aに結
合してコ字型の磁気回路が形成されており、実施例で
は、鉄芯２として、オイルダッシュポット機構よりなる
遅延動作手段が組み込まれたものが用いられている。す
なわち、鉄芯２は、オイルが充填された筒体内に固定鉄
芯2aと可動鉄芯2bをコイルばね2cを介して対向させてお
り、励磁コイル１に流れる負荷電流が増加すると、可動
鉄芯2bが固定鉄芯2a側に引き寄せられ（励磁コイル１内
に吸い込まれ）、予め設定された値以上の負荷電流が一
定時間以上流れ続けたときに可動鉄片４を吸着できる磁
気吸引力が生じるようにしている。一方、可動鉄片４
は、一端部に穿設された係合孔5aをヨーク３の垂直片3b
の先端に設けられた係合突起5bに係合して回動自在に取
着され、自由端が開閉装置Ａのトリップ機構のラッチ引
き外しレバー14に係合自在になっており、中央部が鉄芯
２の他端に吸着自在になっている。また、可動鉄片４と
ヨーク３との間に介装される復帰ばね７は、可動鉄片４
の係合突起5aの先端部に設けられた引っ掛け部8aと、可
動鉄片４の先端に設けられた引っ掛け部8bとの間に介装
されるコイルばねにて形成されている。また、可動鉄片
４の係合孔5aの両側には適当な曲率をもって折り曲げら
れた折り曲げ部６が設けられており、この折り曲げ部６
の丸角部をヨーク３の垂直片3bの内面に当接させて回動
枢支部を形成することにより、可動鉄片４の回動がスム
ーズに行えるようにしている。さらに、可動鉄片４の吸
着面と反対がわ面には、ハウジング12より復帰ばね７の
両側方に突設された一対の規制リブ９が当接され、可動
鉄片４の浮き上がり防止が図られている。また、実施例
では、ヨーク４の垂直片を端子台部に露出させるために
ハウジング12に設けられた開口の近くの段部9aを規制リ
ブとして流用し、可動鉄片４の枢支部の浮き上がりも防
止できるようになっている。(Embodiment) FIGS. 1 to 5 show an embodiment of the present invention. A circuit breaker in which an electromagnetic device according to the present invention is incorporated is a first embodiment.
As shown in the figure, an opening / closing device A having a trip mechanism in a housing 12 composed of a body 12a and a cover 12b,
The electromagnetic device B is housed, and when an excessive load current flows between the input / output terminals (power supply side and load side terminals) 13a and 13b, the electromagnetic device B operates and opens and closes at the tip of the movable iron piece 4 of the electromagnetic device B. The tripping operation is performed by pressing the latch release lever 14 of the trip mechanism of the device A downward to open the switching contact (not shown) inserted in the load circuit. The handle 15 is used to open and close the contacts of the switchgear 11 and to release the trip state. In the electromagnetic device B, one end of the iron core 2 around which the exciting coil 1 is wound is connected to the horizontal piece 3a of the L-shaped yoke 3 to form a U-shaped magnetic circuit. As the iron core 2, a core incorporating a delay operation means composed of an oil dashpot mechanism is used. That is, in the iron core 2, the fixed iron core 2a and the movable iron core 2b are opposed to each other in the cylinder filled with oil via the coil spring 2c, and when the load current flowing in the exciting coil 1 increases, the movable iron core 2a 2b is attracted to the fixed iron core 2a side (sucked into the exciting coil 1), and when a load current of a preset value or more continues to flow for a certain time or more, a magnetic attraction force that can attract the movable iron piece 4 is generated. I have to. On the other hand, the movable iron piece 4
Is a vertical piece 3b of the yoke 3 having an engagement hole 5a formed at one end.
It is rotatably attached by engaging with an engaging protrusion 5b provided at the tip of the, and the free end is engageable with the latch releasing lever 14 of the trip mechanism of the opening / closing device A, and the central portion is It can be adsorbed to the other end of the iron core 2. Further, the return spring 7 interposed between the movable iron piece 4 and the yoke 3 is
It is formed of a coil spring interposed between a hooking portion 8a provided at the tip of the engaging projection 5a and a hooking portion 8b provided at the tip of the movable iron piece 4. Further, bent portions 6 bent with an appropriate curvature are provided on both sides of the engaging hole 5a of the movable iron piece 4, and the bent portions 6
The movable iron piece 4 can be smoothly rotated by abutting the rounded corner portion on the inner surface of the vertical piece 3b of the yoke 3 to form a rotation pivot support portion. Further, a pair of restricting ribs 9 projecting from the housing 12 on both sides of the return spring 7 are brought into contact with the stiffening surface of the movable iron piece 4 opposite to the suction surface, so that the movable iron piece 4 is prevented from rising. There is. Further, in the embodiment, in order to expose the vertical piece of the yoke 4 to the terminal block portion, the stepped portion 9a near the opening provided in the housing 12 is also used as a regulating rib to prevent the pivotal support portion of the movable iron piece 4 from floating. You can do it.
以下、実施例の動作について説明する。いま、電磁装
置Ｂの可動鉄片４は、ヨーク３の垂直片3bの先端に回動
自在に枢支され、可動鉄片４とヨーク３との間に復帰ば
ね７が介装されており、励磁コイル１に過電流が一定時
間以上流れたとき、可動鉄片４が復帰ばね７のばね力に
抗して鉄芯２に吸着され、可動鉄片４の自由端に係合自
在な開閉機構Ａのトリップ機構のラッチ引き外しレバー
14を下方に押圧してトリップ動作が行なわれ、負荷回路
に挿入されている開閉接点（図示せず）を開放するよう
になっている。一方、励磁コイル１に過電流が流れない
かぎり、可動鉄片４は鉄芯２に吸着されることはなく、
復帰ばね７によって不動作位置に保持されている。とこ
ろで、このような電磁装置Ｂに振動や衝撃が加わった場
合には、可動鉄片４が浮き上がって回動枢支位置がずれ
る場合があるが、本発明にあっては、可動鉄片４の折り
曲げ部６の丸角部がヨーク３の垂直片3bに当接して回動
枢支部が形成されており、ヨーク３の垂直片3bと折り曲
げ部６との間の摩擦係数が小さくなっているので、復帰
ばね７のばね力の垂直方向の分力によって可動鉄片４は
すぐに元の回動枢支位置に復帰し、従来例のように可動
鉄片４の回動枢支位置が変化することがなく、それに伴
って感動特性が変化することもない。また、折り曲げ部
６の丸角部によって、通常の可動鉄片４の回動もスムー
ズに行なわれ、安定な動作特性が得られることになる。
さらにまた、可動鉄片４とヨーク３との間の磁気抵抗を
小さくすることができるので、可動鉄片４の吸引特性も
改善されることになる。The operation of the embodiment will be described below. Now, the movable iron piece 4 of the electromagnetic device B is rotatably supported by the tip of the vertical piece 3b of the yoke 3, and the return spring 7 is interposed between the movable iron piece 4 and the yoke 3, and the exciting coil is When an overcurrent flows through the movable iron piece 1 for a certain time or more, the movable iron piece 4 is attracted to the iron core 2 against the spring force of the return spring 7, and the trip mechanism of the opening / closing mechanism A is engageable with the free end of the movable iron piece 4. Latch release lever
By pressing 14 downward, a trip operation is performed, and an opening / closing contact (not shown) inserted in the load circuit is opened. On the other hand, the movable iron piece 4 is not attracted to the iron core 2 unless an overcurrent flows through the exciting coil 1,
It is held in the inoperative position by the return spring 7. By the way, when vibration or impact is applied to such an electromagnetic device B, the movable iron piece 4 may be lifted and the rotational pivot position may be displaced. In the present invention, however, the bent portion of the movable iron piece 4 is bent. The rounded corner portion of 6 abuts on the vertical piece 3b of the yoke 3 to form a pivotal support portion, and the coefficient of friction between the vertical piece 3b of the yoke 3 and the bent portion 6 is small, so that the return The movable iron piece 4 is immediately returned to the original pivoting and supporting position by the vertical component of the spring force of the spring 7, and the pivoting and supporting position of the movable iron piece 4 does not change unlike the conventional example. The impression characteristic does not change accordingly. In addition, due to the rounded corners of the bent portion 6, the normal movable iron piece 4 can be smoothly rotated, and stable operation characteristics can be obtained.
Furthermore, since the magnetic resistance between the movable iron piece 4 and the yoke 3 can be reduced, the attraction characteristic of the movable iron piece 4 is also improved.
［発明の効果］ 本発明は上述のように、励磁コイルが巻装された鉄芯
の一端をＬ字型のヨークの水平片に結合してコ字型の磁
気回路を形成し、一端がヨークの垂直片の先端に回動自
在に取着され自由端が回路遮断器の開閉装置のラッチ引
き外しレバーに係合自在な可動切片の中央部を鉄芯の他
端に吸着自在にし、可動鉄片とヨークとの間に復帰ばね
を介装して成る回路遮断器の電磁装置において、ヨーク
の垂直片の先端に係合突起を設けるとともに、可動鉄片
の一端部に穿設した係合孔に上記係合突起を挿通し、係
合突起の先端部に設けられた引っ掛け部と可動鉄片の自
由端部に設けられた引っ掛け部との間にコイルばねより
なる復帰ばねを介装し、可動鉄片の係合孔の両側に適当
な曲率をもって折り曲げられた折り曲げ部を設け、上記
折り曲げ部の丸角部をヨークの垂直片内面に当接させる
ことにより、振動や衝撃による可動鉄片の浮き上がりが
あっても、可動鉄片の回動位置が変化することがなく、
感動特性が変化することがない回路遮断器の電磁装置を
提供することができるという効果がある。[Effect of the Invention] As described above, according to the present invention, one end of an iron core around which an exciting coil is wound is connected to a horizontal piece of an L-shaped yoke to form a U-shaped magnetic circuit, and one end of the yoke is formed. The movable iron piece is rotatably attached to the tip of the vertical piece and the free end is engageable with the latch release lever of the switchgear of the circuit breaker. In an electromagnetic device of a circuit breaker in which a return spring is interposed between a yoke and a yoke, an engaging protrusion is provided at the tip of a vertical piece of the yoke, and the engaging hole formed at one end of the movable iron piece has the above-mentioned structure. The engaging protrusion is inserted, and a return spring consisting of a coil spring is interposed between the hooking portion provided at the tip of the engaging protrusion and the hooking portion provided at the free end of the movable iron piece. Providing bent parts with appropriate curvature on both sides of the engaging hole, By bringing the rounded corners of the bent portion into contact with the inner surface of the vertical piece of the yoke, the rotating position of the movable iron piece does not change even if the movable iron piece floats up due to vibration or shock,
There is an effect that it is possible to provide an electromagnetic device of a circuit breaker in which the moving characteristic does not change.
第１図は本発明一実施例に係る電磁装置を用いた回路遮
断器の断面図、第２図は同上の一部切欠上面図、第３図
は本発明一実施例の斜視図、第４図は同上の分解斜視
図、第５図は同上の側面図、第６図（ａ）は従来例の断
面図、第６図（ｂ）は同上の分解斜視図である。 Ａは開閉装置、Ｂは電磁装置、１は励磁コイル、２は鉄
芯、３はヨーク、3aは水平片、3bは垂直片、４は可動鉄
片、5aは係合突起、5bは係合孔、６は折り曲げ部、７は
復帰ばね、8a,8bは引っ掛け部である。FIG. 1 is a sectional view of a circuit breaker using an electromagnetic device according to an embodiment of the present invention, FIG. 2 is a partially cutaway top view of the same, and FIG. 3 is a perspective view of an embodiment of the present invention. FIG. 5 is an exploded perspective view of the same as above, FIG. 5 is a side view of the same as above, FIG. 6 (a) is a sectional view of a conventional example, and FIG. 6 (b) is an exploded perspective view of the same. A is an opening / closing device, B is an electromagnetic device, 1 is an exciting coil, 2 is an iron core, 3 is a yoke, 3a is a horizontal piece, 3b is a vertical piece, 4 is a movable iron piece, 5a is an engaging protrusion, and 5b is an engaging hole. 6 is a bent portion, 7 is a return spring, and 8a and 8b are hooked portions.
Claims (1)
型のヨークの水平片に結合してコ字型の磁気回路を形成
し、一端がヨークの垂直片の先端に回動自在に取着され
自由端が回路遮断器の開閉装置のラッチ引き外しレバー
に係合自在な可動鉄片の中央部を鉄芯の他端に吸着自在
にし、可動鉄片とヨークとの間に復帰ばねを介装して成
る回路遮断器の電磁装置において、ヨークの垂直片の先
端に係合突起を設けるとともに、可動鉄片の一端部に穿
設した係合孔に上記係合突起を挿通し、係合突起の先端
部に設けられた引っ掛け部と可動鉄片の自由端部に設け
られた引っ掛け部との間にコイルばねよりなる復帰ばね
を介装し、可動鉄片の係合孔の両側に適当な曲率をもっ
て折り曲げられた折り曲げ部を設け、上記折り曲げ部の
丸角部をヨークの垂直片内面に当接せしめたことを特徴
とする回路遮断器の電磁装置。1. An U-shaped magnetic circuit is formed by connecting one end of an iron core around which an exciting coil is wound to a horizontal piece of an L-shaped yoke, and one end of the iron core is rotated to the tip of a vertical piece of the yoke. A free spring is attached between the movable iron piece and the yoke so that the center of the movable iron piece, which is freely attached and whose free end can be engaged with the latch release lever of the circuit breaker switchgear, can be adsorbed to the other end of the iron core. In an electromagnetic device of a circuit breaker formed by interposing, an engaging projection is provided at a tip of a vertical piece of a yoke, and the engaging projection is inserted into an engaging hole formed at one end of a movable iron piece. A return spring consisting of a coil spring is interposed between the hooking portion provided at the tip of the mating protrusion and the hooking portion provided at the free end of the movable iron piece. Providing a bent portion that is bent with a curvature, and rounded corners of the bent portion of the yoke Electromagnetic device of a circuit breaker, characterized in that it brought into contact with the straight piece inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32632587A JP2505011B2 (en) | 1987-12-23 | 1987-12-23 | Electromagnetic device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32632587A JP2505011B2 (en) | 1987-12-23 | 1987-12-23 | Electromagnetic device of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01166435A JPH01166435A (en) | 1989-06-30 |
| JP2505011B2 true JP2505011B2 (en) | 1996-06-05 |
Family
ID=18186507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32632587A Expired - Lifetime JP2505011B2 (en) | 1987-12-23 | 1987-12-23 | Electromagnetic device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2505011B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03238726A (en) * | 1990-02-15 | 1991-10-24 | Matsushita Electric Works Ltd | Exciting coil coiling method for excess current detector of molded-case circuit-breaker |
| US5186594A (en) * | 1990-04-19 | 1993-02-16 | Applied Materials, Inc. | Dual cassette load lock |
| JP3290088B2 (en) * | 1997-02-20 | 2002-06-10 | 株式会社オートネットワーク技術研究所 | Circuit breaker |
| JP6421333B2 (en) * | 2015-02-18 | 2018-11-14 | パナソニックＩｐマネジメント株式会社 | Electromagnetic trip device and circuit breaker |
| CN106328444B (en) * | 2015-06-30 | 2019-05-10 | 泰科电子(深圳)有限公司 | The magnetic force systems of electromagnetic relay |
-
1987
- 1987-12-23 JP JP32632587A patent/JP2505011B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01166435A (en) | 1989-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
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