JP6307297B2 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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JP6307297B2
JP6307297B2 JP2014027088A JP2014027088A JP6307297B2 JP 6307297 B2 JP6307297 B2 JP 6307297B2 JP 2014027088 A JP2014027088 A JP 2014027088A JP 2014027088 A JP2014027088 A JP 2014027088A JP 6307297 B2 JP6307297 B2 JP 6307297B2
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fixed contact
contact
protrusion
circuit
bending
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JP2015153636A (en
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拓樹 益子
拓樹 益子
中村　大輔
大輔 中村
純 倉茂
純 倉茂
鈴木　健太
健太 鈴木
知佳 高橋
知佳 高橋
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Hitachi Industrial Equipment Systems Co Ltd
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Description

本発明は、電路の過電流及び短絡電流を遮断する回路遮断器に関する。   The present invention relates to a circuit breaker that cuts off an overcurrent and a short-circuit current in an electric circuit.

回路遮断器では、固定接触子において電流経路を折返すことにより、限流効果が得られ、遮断性能が向上することが知られている。   In a circuit breaker, it is known that a current limiting effect is obtained by folding a current path in a stationary contact, and the breaking performance is improved.

本技術分野の背景技術として、特許文献１（特開平１０−７４４４２号公報）や特許文献２（特開昭６１−１１６７３０号公報）がある。   As background art in this technical field, there are Patent Document 1 (Japanese Patent Laid-Open No. 10-74442) and Patent Document 2 (Japanese Patent Laid-Open No. 61-116730).

特許文献１には、限流効果により回路遮断器の遮断性能を向上させるために、固定接触子を「Ｊ」字形に曲げ、その先端が可動接触子に対向するように配設することが記載されている。また、特許文献２には、固定接触子の先端側に基端側に伸びる舌片を残して切欠穴を設けた固定接触子が開示されている。   Patent Document 1 describes that a fixed contact is bent in a “J” shape and its tip is arranged to face the movable contact in order to improve the breaking performance of the circuit breaker by a current limiting effect. Has been. Patent Document 2 discloses a fixed contact in which a notch hole is provided on the distal end side of the fixed contact, leaving a tongue piece extending toward the proximal end.

特開平１０−７４４４２号公報Japanese Patent Laid-Open No. 10-74442 特開昭６１−１１６７３０号公報JP 61-116730 A

前記特許文献１には、固定接触子を「Ｊ」字形に曲げ、電路を折返すようにしているが、固定接触子に使用する材料が多くなり、コストが増大するといった問題がある。   In Patent Document 1, the fixed contact is bent into a “J” shape and the electric circuit is folded back, but there is a problem that the material used for the fixed contact increases and the cost increases.

また、前記特許文献２では、固定接触子はＵ字溝状の切欠穴を設けることで、電流経路を折返すことができるが、材料を打ち抜くために、材料に無駄がでるという問題がある。   Moreover, in the said patent document 2, although a fixed contact can provide a U-shaped groove-shaped notch hole, the current path can be turned back, but there is a problem that the material is wasted because the material is punched out.

上記課題を解決するために、例えば特許請求の範囲に記載の構成を採用する。本願は上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、電路に流れる過電流または短絡電流を遮断する回路遮断器であって、前記電路に接続され固定接点を備えた固定接触子と、前記固定接点と対向して配置され当接または離間する可動接点を備えた可動接触子とを備え、前記固定接触子は、切曲げ加工により形成した突起部を有し、該突起部に前記固定接点を配置しており、前記電路接続側とは逆の方向へ延びる前記固定接触子の端部と前記突起部がほぼ同一平面となるように折曲げられている構成とする。   In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-mentioned problems. For example, a circuit breaker that cuts off an overcurrent or a short-circuit current flowing in an electric circuit, which is connected to the electric circuit and includes a fixed contact. A fixed contact; and a movable contact provided with a movable contact disposed opposite to or contacting the fixed contact, the fixed contact having a protrusion formed by cutting, The fixed contact is arranged on the protrusion, and the end of the fixed contact extending in the direction opposite to the electric circuit connection side and the protrusion are bent so as to be substantially in the same plane. .

本発明によれば、限流効果を利用した遮断性能の高い回路遮断器を、安価に製作することができる。   According to the present invention, a circuit breaker having a high breaking performance utilizing the current limiting effect can be manufactured at low cost.

本発明の実施例における回路遮断器の全体構成の断面図を示す。1 is a cross-sectional view of the overall configuration of a circuit breaker in an embodiment of the present invention. 図１の回路遮断器の固定接触子、可動接触子、アークランナ及び消孤装置の構成の斜視図を示す。The perspective view of the structure of the stationary contact of the circuit breaker of FIG. 1, a movable contact, an arc runner, and a silencer is shown. 本発明の実施例における固定接触子の外観斜視図を示す。The external appearance perspective view of the stationary contact in the Example of this invention is shown. 図３Ａに示した固定接触子の接点部周辺の展開図を示す。The expanded view of the contact part periphery of the fixed contact shown in FIG. 3A is shown. 従来技術の固定接触子の外観斜視図を示す。The external appearance perspective view of the stationary contact of a prior art is shown. 図４Ａに示した固定接触子の接点部周辺の展開図を示す。The expanded view of the contact part periphery of the fixed contact shown in FIG. 4A is shown. 他の従来技術の固定接触子の外観斜視図を示す。The external appearance perspective view of the fixed contact of another prior art is shown. 図５Ａに示した固定接触子の接点部周辺の平面図を示す。The top view of the contact part periphery of the fixed contact shown in FIG. 5A is shown.

まず、従来技術における、固定接触子の構造について図面を用いて詳細に説明する。   First, the structure of the stationary contact in the prior art will be described in detail with reference to the drawings.

図４Ａは従来技術（特許文献１参照）における固定接触子と固定接点の外観斜視図を示し、図４Ｂは図４Ａに示した固定接触子の接点部付近の折曲げる前の展開図を示す。   FIG. 4A is an external perspective view of a fixed contact and a fixed contact in the prior art (see Patent Document 1), and FIG. 4B is a development view before folding in the vicinity of the contact portion of the fixed contact shown in FIG. 4A.

図４Ａにおいて、電源側端子４１には電源側ラインと接続するための孔４１１を有し、４２１、４３１部にてＬ字形状に折り曲げられる。次に４４１、４５１にて、「Ｊ」字形状に折り返すことで、突起部４６１を形成し、固定接触子４２を形成する。また、固定接触子４２は、４５１で折り曲げた箇所より平らな部分を有し、この平らな部分の中央に固定接点４３を配置するため、電路は電源側から折り返され、可動接点へと繋がる経路となる。   In FIG. 4A, the power supply side terminal 41 has a hole 411 for connecting to the power supply side line, and is bent into an L shape at portions 421 and 431. Next, at 441 and 451, the protrusion 461 is formed by folding back into a “J” shape, and the fixed contact 42 is formed. In addition, the fixed contact 42 has a portion flatter than the portion bent at 451, and the fixed contact 43 is disposed at the center of the flat portion. Therefore, the electric circuit is folded from the power source side and connected to the movable contact. It becomes.

図４Ｂは、図４Ａの接点部周辺の展開図であるが、固定接触子４２は「Ｊ」字形に折り曲げ、電流経路を折返しているため、展開時の材料が長くなる。また、固定接点４３を背面から支えるために、孔４７１が必要となる。そのため、大きな不要部材が発生し、歩留りが悪いという問題があった。   FIG. 4B is a developed view around the contact portion of FIG. 4A. However, the stationary contact 42 is bent into a “J” shape and the current path is folded back, so that the material at the time of deployment becomes longer. Further, a hole 471 is required to support the fixed contact 43 from the back. Therefore, there is a problem that a large unnecessary member is generated and the yield is poor.

図５Ａは他の従来技術（特許文献２参照）における固定接触子と固定接点の外観斜視図を示し、図５Ｂは図５Ａに示した固定接触子の接点部付近を真上から見た平面図である。   FIG. 5A is an external perspective view of a stationary contact and a stationary contact according to another prior art (see Patent Document 2), and FIG. 5B is a plan view of the vicinity of the contact portion of the stationary contact shown in FIG. It is.

図５Ａにおいて、電源側端子５１には電源側ラインと接続するための孔５１１を有し、５２１、５３１部にてＬ字形状に折り曲げられる。次に接点部周辺にＵ字状の溝５４１を打ち抜くことにより、突起部５５１を形成し、固定接触子５２を形成する。また、固定接触子５２は、中央の平らな部分の中央に固定接点５３を配置するため、電路は溝を迂回して折り返され、可動接点へと繋がる経路となる。   5A, the power supply side terminal 51 has a hole 511 for connecting to the power supply side line, and is bent into an L shape at 521 and 531 parts. Next, a U-shaped groove 541 is punched out around the contact portion to form a protrusion 551 and a fixed contact 52. Further, since the fixed contact 52 has the fixed contact 53 disposed at the center of the flat portion at the center, the electric circuit is folded around the groove and becomes a path connected to the movable contact.

図５Ｂに示すように、固定接触子５２はＵ字溝を付けることで、電流経路を折返すことができるが、材料を打ち抜くことで材料に無駄ができると共に、電流密度が増大するといった欠点がある。また、一般に材料を打ち抜く幅は、板厚の２倍以上と言われており、Ｕ字に打ち抜く場合、幅方向に２つの溝ができるため、材料の幅方向では板厚の４倍分の幅は失うことになり、電流密度が増大し、不要部材も非常に多くなるという問題があった。   As shown in FIG. 5B, the fixed contact 52 has a U-shaped groove, so that the current path can be turned back. However, the material can be wasted by punching the material, and the current density is increased. is there. Also, it is generally said that the width of punching material is more than twice the plate thickness. When punching into a U-shape, two grooves are formed in the width direction, so the width is 4 times the plate thickness in the width direction of the material. As a result, the current density increases and the number of unnecessary members increases.

よって、それらを解決するための本発明の実施例を、以下、図面を用いて説明する。   Therefore, embodiments of the present invention for solving these problems will be described below with reference to the drawings.

図１は、本実施例の回路遮断器の全体構成の断面図を示す。
図１において、１０は回路遮断器、１１は電源側端子、１２は固定接触子で、折り返した形状を有し、１３は折り返し形状の固定接触子１２に設置した固定接点、１４は折り返し形状の固定接触子に設置したアークランナ、１５は可動接点、１６は可動接触子、１７は接点間に発生したアークを消孤する消孤装置、１８は電流をＯＮ−ＯＦＦするための可動接触子１６を駆動する開閉機構（点線枠）、１９は過電流または短絡電流が流れた際に開閉機構１８を駆動し、接点を離間させる引き外し装置（点線枠）である。また、２０、２２は電流を流す導体、２１は温度により変化するバイメタル、２３は負荷側端子、２４は可動部、２６は可動コア、２７は固定コア、２８は開閉機構部や引き外し機構などを収納するケース、２９はケース２８のカバーである。すなわち、電源と負荷との間の電路に流れる過電流または短絡電流を遮断する回路遮断器を示している。 FIG. 1 shows a cross-sectional view of the overall configuration of the circuit breaker of this embodiment.
In FIG. 1, 10 is a circuit breaker, 11 is a power supply side terminal, 12 is a fixed contact, has a folded shape, 13 is a fixed contact placed on the folded fixed contact 12, and 14 is a folded shape. An arc runner installed on a fixed contact, 15 is a movable contact, 16 is a movable contact, 17 is an extinguishing device for extinguishing an arc generated between the contacts, and 18 is a movable contact 16 for turning the current on and off. A driving opening / closing mechanism (dotted line frame) 19 is a tripping device (dotted line frame) that drives the opening / closing mechanism 18 when an overcurrent or a short-circuit current flows and separates the contacts. 20 and 22 are conductors through which current flows, 21 is a bimetal that changes depending on temperature, 23 is a load side terminal, 24 is a movable part, 26 is a movable core, 27 is a fixed core, 28 is an opening / closing mechanism part, a tripping mechanism, etc. , 29 is a cover for the case 28. That is, the circuit breaker which interrupts | blocks the overcurrent or short circuit current which flows into the electrical circuit between a power supply and load is shown.

まず、回路遮断器１０の構成について説明する。   First, the configuration of the circuit breaker 10 will be described.

図１において、回路遮断器１０は、電源側端子１１を含む固定接触子１２の上に固定接点１３を配置している。また、固定接触子１２にはアークランナ１４を設置する。この固定接触子１２の構成については後で詳細に説明する。   In FIG. 1, the circuit breaker 10 has a fixed contact 13 disposed on a fixed contact 12 including a power supply side terminal 11. An arc runner 14 is installed on the stationary contact 12. The configuration of the stationary contact 12 will be described in detail later.

固定接点１３に対向する位置に可動接点１５が配置され、可動接点１５は可動接触子１６に設置、固定されている。また、電流を遮断する際に接点間に発生したアークを消孤する消孤装置１７を可動接触子１６の周囲に配置する。   A movable contact 15 is disposed at a position facing the fixed contact 13, and the movable contact 15 is installed and fixed to the movable contact 16. In addition, an extinguishing device 17 for extinguishing an arc generated between the contacts when the current is interrupted is disposed around the movable contact 16.

可動接触子１６は、フレキシブルな導体２０に接続され、導体２０は引き外し装置１９を構成しているバイメタル２１に接続される。バイメタル２１は、ケース２８内でほぼ垂直に配置し、バイメタル２１の中央部より導体２２に接続し、導体２２は負荷側端子２３に接続される。   The movable contact 16 is connected to a flexible conductor 20, and the conductor 20 is connected to a bimetal 21 constituting a tripping device 19. The bimetal 21 is disposed substantially vertically in the case 28 and is connected to the conductor 22 from the center of the bimetal 21, and the conductor 22 is connected to the load side terminal 23.

引き外し装置１９を構成するバイメタル２１は、過電流による熱で先端が変形し、変形することにより可動部２４を押し、開閉機構１８を動作させ、接点を離間し電路を遮断する。   The bimetal 21 constituting the tripping device 19 is deformed at its tip by heat due to overcurrent, and when it is deformed, the movable part 24 is pushed, the open / close mechanism 18 is operated, the contacts are separated, and the electric circuit is cut off.

また、引き外し装置１９は、電路に過電流が流れたとき開閉機構１８を動作させるバイメタルと、電路の短絡電流が流れたとき開閉機構１８を動作させる電磁式引き外し機構をバイメタル２１の隣に並んで配置している。   The tripping device 19 has a bimetal that operates the switching mechanism 18 when an overcurrent flows in the electric circuit and an electromagnetic trip mechanism that operates the switching mechanism 18 when a short circuit current flows in the electric circuit. They are arranged side by side.

電磁式引き外し機構は、可動コア２６と固定コア２７を設置し、短絡電流が流れると電磁力が発生し、可動コア２６を吸引し、可動部２４を押し、開閉機構１８を動作させ、接点を離間し電路を遮断する。   The electromagnetic tripping mechanism has a movable core 26 and a fixed core 27. When a short-circuit current flows, an electromagnetic force is generated, the movable core 26 is attracted, the movable part 24 is pushed, the opening / closing mechanism 18 is operated, and the contact point And disconnect the electrical circuit.

次に、回路遮断器の可動接触子と固定接触子の周囲の構成について説明する。   Next, the configuration around the movable contact and the fixed contact of the circuit breaker will be described.

図２は、固定接触子、可動接触子、アークランナ及び消孤装置の構造の斜視図を示し、接点が開放された状態を示している。   FIG. 2 is a perspective view of the structure of the stationary contact, the movable contact, the arc runner, and the extinguishing device, and shows a state where the contacts are opened.

図２において、電源側端子１１は電源ラインと接続するための孔１１１を有し、続く部材を逆Ｌ字形状に折り曲げ、続けてＬ字形状に折り曲げ、平らな部分を一部有し、続けて切曲げ加工により、電路を折返す形状に成型され、固定接触子１２を形成する。この固定接触子１２の構成については後で詳細に説明する。   In FIG. 2, the power supply side terminal 11 has a hole 111 for connecting to the power supply line, and the subsequent member is bent into an inverted L shape, then bent into an L shape, and has a part of a flat portion. Then, the fixed contact 12 is formed by cutting and bending into a shape that turns the electric circuit. The configuration of the stationary contact 12 will be described in detail later.

固定接触子１２の細長い突起部１６１のほぼ中央部には固定接点１３を配置し、固定接点１３に対向する箇所に可動接点１５を可動接触子１６の先端に配置し、可動接点１５が固定接点１３と当接したり離間したりする。また、固定接触子１２の細長い突起部１６１の下側にはアークランナ１４を配置する。さらに、可動接触子１６と固定接触子１２の周囲を取り囲むように消孤装置１７を配置する。消孤装置１７は、複数の板材を所定の間隔を持たせ、積み上げる構成としている。   A fixed contact 13 is arranged at a substantially central portion of the elongated protrusion 161 of the fixed contact 12, a movable contact 15 is arranged at a tip of the movable contact 16 at a position facing the fixed contact 13, and the movable contact 15 is a fixed contact. 13 abuts or separates. Further, an arc runner 14 is disposed below the elongated protrusion 161 of the fixed contact 12. Further, the dissipating device 17 is arranged so as to surround the periphery of the movable contact 16 and the fixed contact 12. The extinguishing device 17 has a configuration in which a plurality of plate materials are stacked at a predetermined interval.

このように固定接触子１２を電流が折返す構造とし、アークランナ、消弧装置を設ける構成により、接点間で発生したアークに電磁力を加え、アークを駆動することができるため、遮断性能が向上する。   In this way, the structure in which the stationary contact 12 is turned back and the arc runner and the arc extinguishing device are provided, so that an electromagnetic force can be applied to the arc generated between the contacts to drive the arc, thereby improving the interruption performance. To do.

次に、本実施例の固定接触子について、図３Ａ及び図３Ｂを用いて説明する。   Next, the stationary contact of the present embodiment will be described with reference to FIGS. 3A and 3B.

図３Ａは固定接触子と固定接点の外観斜視図を示し、図３Ｂは図３Ａに示した固定接触子の接点部付近の折曲げる前の展開図を示す。   FIG. 3A is an external perspective view of the fixed contact and the fixed contact, and FIG. 3B is a development view before bending in the vicinity of the contact portion of the fixed contact shown in FIG. 3A.

図３Ａにおいて、電源側端子１１には電源側ラインと接続するための孔１１１を有し、続く部材を１２１、１３１部にてＬ字形状に折り曲げる。続けて切曲げ加工により１４１、１５１にて、折り曲げると同時に、突起部１６１を起こして、固定接触子１２を形成する。   In FIG. 3A, the power supply side terminal 11 has a hole 111 for connecting to the power supply side line, and the subsequent members are bent into L-shapes at 121 and 131 parts. Subsequently, bending is performed at 141 and 151 by cutting and bending, and at the same time, the protrusion 161 is raised to form the fixed contact 12.

また、固定接触子１２は、１５１にて折り曲げた箇所より平らな部分である突起部１６１を有し、この平らな部分の中央に固定接点１３を配置するため、電路は電源側から折り返され、可動接点へと繋がる経路となる。また、１５１にて折り曲げた箇所から電源側端子とは逆の方向へ延びる端部１０１は、電流折返し部分であり、この端部１０１と突起部１６１がほぼ同一平面である構成としている。このような構成とすることで、可動接点を備えた可動接触子と対向する固定接触子側の電流が流れる距離を、端部１０１から固定接点１３までの距離として稼ぐことができるので、より電磁反発力を大とすることが出来、限流効果を上げることが出来る。   In addition, the fixed contact 12 has a protrusion 161 that is flatter than the portion bent at 151, and the fixed contact 13 is disposed at the center of the flat portion, so that the electric circuit is folded from the power source side, This is the path leading to the movable contact. Further, the end 101 extending in the direction opposite to the power supply side terminal from the portion bent at 151 is a current turn-back portion, and the end 101 and the protruding portion 161 are substantially flush with each other. With such a configuration, the distance through which the current on the fixed contact side facing the movable contact provided with the movable contact flows can be earned as the distance from the end 101 to the fixed contact 13, so that the electromagnetic The repulsive force can be increased, and the current limiting effect can be increased.

図３Ｂは、図３Ａの固定接点１３周辺の切曲げ加工を行う前の展開図を示す。固定接触子１２は孔１７１、１８１を有し、切曲げ加工により線１９１に沿って切られると共に、１４１、１５１部を曲げることで、固定接触子１２を形成する。このような構成とすることで、孔１７１、１８１以外は無駄なく電流経路として有効に使えるため部材の有効利用がはかれるという効果がある。なお、孔１７１、１８１は、切曲げ加工を行う際に、より加工しやすくするために必要であるが、なくても切曲げ加工は可能である。その場合は、孔１７１、１８１も不要であるので、より部材の有効利用がはかれる。   FIG. 3B shows a development view before cutting and cutting around the fixed contact 13 of FIG. 3A. The fixed contact 12 has holes 171 and 181 and is cut along a line 191 by cutting and bending, and the fixed contact 12 is formed by bending portions 141 and 151. By adopting such a configuration, since the portions other than the holes 171 and 181 can be effectively used as current paths without waste, there is an effect that the members can be effectively used. It should be noted that the holes 171 and 181 are necessary for easier processing when performing the cutting process, but the cutting process is possible even without the holes. In that case, since the holes 171 and 181 are also unnecessary, the member can be used more effectively.

すなわち、本実施例の固定接触子１２は、従来のように部材を打ち抜かずに切曲げ加工を行うことで、部材の利用効率の増大を図ると共に、電流折返し部分である電源側端子とは逆の方向へ延びる端部１０１と、固定接点を備えた突起部１６１がほぼ同一平面となるように折曲げることで、電磁反発力を大とすることが出来、限流効果を上げることが出来ることを特徴とする。   In other words, the fixed contact 12 of this embodiment is not bent and punched as in the prior art, thereby increasing the utilization efficiency of the member, and is opposite to the power supply side terminal that is the current turn-back portion. By bending the end portion 101 extending in the direction of the protrusion and the protruding portion 161 having the fixed contact so as to be substantially in the same plane, the electromagnetic repulsive force can be increased and the current limiting effect can be increased. It is characterized by.

言い換えれば、切断と曲げにより、電源接続側を先端とする略コ字形の突起部１６１と、曲げによる曲部１５１よりも電源接続側とは逆の方向へ延びる突起部１６１に連なる端部１０１が突起部１６１とほぼ同一平面となるように形成されている。   In other words, by cutting and bending, the substantially U-shaped protrusion 161 having the power connection side as the tip and the end 101 connected to the protrusion 161 extending in the opposite direction to the power connection side than the bent portion 151 by bending are provided. It is formed so as to be substantially flush with the protrusion 161.

さらに言い換えるならば、突起部１６１と突起部１６１に連なる端部１０１は略Ｔ字状の形状をしているので、突起部１６１と端部１０１を合わせて突起部と再定義すれば、固定接触子は、略Ｔ字状の突起部を切曲げ加工により形成した構成となる。なお、その略Ｔ字状の突起部の１辺は端部１０１であり、前述した電流折返し部分に相当する。   In other words, since the projecting portion 161 and the end portion 101 connected to the projecting portion 161 have a substantially T-shape, if the projecting portion 161 and the end portion 101 are combined and redefined as the projecting portion, fixed contact is achieved. The child has a configuration in which a substantially T-shaped protrusion is formed by cutting and bending. One side of the substantially T-shaped protrusion is an end 101, which corresponds to the above-described current folding portion.

なお、固定接触子１２の突起部１６１の製造プロセスとしては、図３Ｂにおいて、線１９１に沿って切る工程と、その後一旦均して、その後、１４１、１５１部の曲げ加工を行なうことで、安定した加工が可能となる。しかし、線１９１に沿って切る工程と１４１、１５１部の曲げ加工を同時に行なっても良い。   In addition, as a manufacturing process of the protrusion 161 of the stationary contact 12, the process of cutting along the line 191 in FIG. 3B, and then once leveling, and then bending the 141 and 151 parts is performed stably. Can be processed. However, the step of cutting along the line 191 and the bending of the 141 and 151 parts may be performed simultaneously.

また、固定接触子１２の突起部１６１の固定接点設置位置よりも電源側の部分は、可動接点と固定接点との電磁反発力には寄与しないので、固定接点設置位置と同一平面とする必要はなく、アークランナの機能として働くために、適宜形状を変更することが可能である。   Further, since the portion on the power source side of the fixed contact installation position of the protrusion 161 of the fixed contact 12 does not contribute to the electromagnetic repulsive force between the movable contact and the fixed contact, it is necessary to make the same plane as the fixed contact installation position. In order to function as an arc runner function, the shape can be changed as appropriate.

また、固定接触子１２の細長い突起部１６１の下側にはアークランナ１４を配置しているが、突起部からアークランナを露出した方が、アークを電源側に駆動させるのに有利であるので、突起部１６１の形状を電源側の先端が細くなる形状としても良い。   Further, the arc runner 14 is disposed below the elongated protrusion 161 of the stationary contact 12, but it is advantageous to drive the arc to the power source side if the arc runner is exposed from the protrusion. The shape of the portion 161 may be a shape in which the tip on the power source side becomes narrow.

以上のように本実施例は、電路に流れる過電流または短絡電流を遮断する回路遮断器であって、前記電路に接続され固定接点を備えた固定接触子と、前記固定接点と対向して配置され当接または離間する可動接点を備えた可動接触子とを備え、前記固定接触子は、切曲げ加工により形成した突起部を有し、該突起部に前記固定接点を配置しており、前記電路接続側とは逆の方向へ延びる前記固定接触子の端部と前記突起部がほぼ同一平面となるように折曲げられている構成とした。   As described above, the present embodiment is a circuit breaker that cuts off an overcurrent or a short-circuit current flowing in an electric circuit, and is disposed so as to be opposed to the fixed contact, which is connected to the electric circuit and includes a fixed contact. And a movable contact provided with a movable contact that contacts or separates, and the fixed contact has a protrusion formed by cutting and bending, and the fixed contact is disposed on the protrusion, It was set as the structure by which the edge part of the said stationary contact extended in the direction opposite to an electric circuit connection side and the said projection part were bent so that it might become substantially the same plane.

また、前記固定接触子は、切断と曲げにより、前記電源接続側を先端とする略コ字形の突起部と、前記曲げによる曲部よりも前記電源接続側とは逆の方向へ延びる前記突起部に連なる端部が前記突起部とほぼ同一平面となるように形成されており、前記突起部に前記固定接点が配置されている構成とした。   Further, the fixed contact is cut and bent to have a substantially U-shaped protrusion having the power connection side as a tip, and the protrusion extending in a direction opposite to the power connection side than the bent portion due to the bending. The end portion connected to the projection portion is formed to be substantially flush with the projection portion, and the fixed contact is arranged on the projection portion.

また、前記固定接触子は、略Ｔ字状の突起部を切曲げ加工により形成し、該突起部に前記固定接点を配置した構成とした。   In addition, the fixed contact has a configuration in which a substantially T-shaped protrusion is formed by cutting and bending, and the fixed contact is disposed on the protrusion.

以上のように、本実施例によれば、限流効果を利用した遮断性能の高い回路遮断器を、安価に製作することができ、仕様材料削減および歩留り向上により、環境負荷を削減することができる。   As described above, according to this embodiment, it is possible to manufacture a circuit breaker having a high breaking performance using the current limiting effect at a low cost, and to reduce the environmental load by reducing specification materials and improving yield. it can.

以上実施例について説明したが、本発明は上記した実施例に限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施例は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。   Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

１０‥回路遮断器、１１‥電源側端子、１２‥固定接触子１３‥固定接点、
１４‥アークランナ、１５‥可動接点、１６‥可動接触子、１７‥消孤装置、
１８‥開閉機構（点線枠）、１９‥引き外し装置（点線枠）、
２０、２２‥導体、２１‥バイメタル、２３‥負荷側端子、２４‥可動部、
２６‥可動コア、２７‥固定コア、２８‥ケース、２９‥カバー
４２‥従来技術における固定接触子、４３‥従来技術における固定接点、
５２‥他の従来技術における固定接触子、
５３‥他の従来技術における固定接点、１０１‥端部、１６１‥突起部 10 Circuit breaker 11 Power supply terminal 12 Fixed contact 13 Fixed contact
14... Arc runner, 15. Movable contact, 16. Movable contact, 17.
18 ... Opening / closing mechanism (dotted line frame), 19 ... Tripping device (dotted line frame),
20, 22 Conductor, 21 Bimetal, 23 Load terminal, 24 Movable part,
26 ... movable core, 27 ... fixed core, 28 ... case, 29 ... cover 42 ... fixed contact in the prior art, 43 ... fixed contact in the prior art,
52. Other conventional fixed contacts,
53 ... Other conventional fixed contacts, 101 ... End, 161 ... Projection

Claims (2)

電路に流れる過電流または短絡電流を遮断する回路遮断器であって、
前記電路に接続され固定接点を備えた固定接触子と、
前記固定接点と対向して配置され当接または離間する可動接点を備えた可動接触子とを備え、
前記固定接触子は、部材を打ち抜かずに切曲げ加工により、突起部を形成し該突起部が前記電路接続側とは逆の方向へ延びる前記固定接触子の端部とほぼ同一平面となるように折曲げられており、前記突起部に前記固定接点が配置されており、
前記固定接触子は、前記切曲げ加工のための孔が前記突起部と前記端部の境界に設けられていることを特徴とする回路遮断器。 A circuit breaker that cuts off overcurrent or short-circuit current flowing in an electric circuit,
A fixed contact connected to the electrical circuit and provided with a fixed contact;
A movable contact provided with a movable contact disposed opposite to the fixed contact and abutting or separating;
The fixed contact is formed by a bending process without punching a member so that the protrusion is substantially flush with an end of the fixed contact extending in a direction opposite to the circuit connection side. And the fixed contact is disposed on the protrusion ,
The circuit breaker, wherein the fixed contact is provided with a hole for the cutting and bending at a boundary between the protrusion and the end . 電源と負荷との間の電路に流れる過電流または短絡電流を遮断する回路遮断器であって、
前記電源に接続され固定接点を備えた固定接触子と、
前記固定接点と対向して配置され当接または離間する可動接点を備えた可動接触子とを備え、
前記固定接触子は、部材を打ち抜かずに切断と曲げにより、前記電源接続側を先端とする略コ字形の突起部と、前記曲げによる曲部よりも前記電源接続側とは逆の方向へ延びる前記突起部に連なる端部とがほぼ同一平面となるように形成されており、
前記突起部に前記固定接点が配置されており、
前記固定接触子は、前記切断と曲げのための孔が前記突起部と前記端部の境界に設けられていることを特徴とする回路遮断器。 A circuit breaker that interrupts an overcurrent or short-circuit current flowing in a circuit between a power source and a load,
A fixed contact connected to the power source and provided with a fixed contact;
A movable contact provided with a movable contact disposed opposite to the fixed contact and abutting or separating;
The stationary contact extends by cutting and bending without punching a member, and a substantially U-shaped protrusion having the power connection side as a tip, and a direction opposite to the power connection side than the bent portion due to the bending. It is formed so that the end part connected to the projection part is substantially on the same plane,
The fixed contact is disposed on the protrusion ,
The circuit breaker according to claim 1, wherein the stationary contact is provided with a hole for cutting and bending at a boundary between the protrusion and the end .
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