JP2007311071A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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JP2007311071A
JP2007311071A JP2006136740A JP2006136740A JP2007311071A JP 2007311071 A JP2007311071 A JP 2007311071A JP 2006136740 A JP2006136740 A JP 2006136740A JP 2006136740 A JP2006136740 A JP 2006136740A JP 2007311071 A JP2007311071 A JP 2007311071A
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movable contact
lead wire
circuit breaker
contact
rotation
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JP2006136740A
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JP4816241B2 (en
Inventor
Hideto Yamagata
山縣　　秀人
Mitsuhiro Mitsushige
三弘 満重
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Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Priority to JP2006136740A priority Critical patent/JP4816241B2/en
Priority to KR1020070045845A priority patent/KR100885334B1/en
Priority to CN2007101038311A priority patent/CN101075513B/en
Publication of JP2007311071A publication Critical patent/JP2007311071A/en
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Publication of JP4816241B2 publication Critical patent/JP4816241B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/046—Enhanced legend space by smaller actuators

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  • Breakers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker capable of preventing local bend of a lead wire, increasing an angle of rotation movement of a movable contact connected to the lead wire, and reducing a size of a periphery of the lead wire. <P>SOLUTION: The lead wire 7 is wound around a movable shaft pin 8 by more than one-half rotation, and is wired so as to be drawn in an approximate tangent direction with respect to a rotation track of a junction part of the lead wire 7 and the movable contact 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は回路遮断器に関し、特に、回路遮断器の可動接触子を固定導体と接続する可とうリード線の構造に適用して好適なものである。   The present invention relates to a circuit breaker, and is particularly suitable for application to a flexible lead wire structure for connecting a movable contact of a circuit breaker to a fixed conductor.

大電力を扱う電機機器では、負荷に流れる短絡電流または負荷電流を遮断するために、回路遮断器が用いられている。
図４は、従来の回路遮断器の概略構成を示す断面図である。
図４において、回路遮断器には、可動接触子１０４および固定接触子１０１が設けられ、可動接触子１０４の先端には可動接点１０３が設けられるとともに、固定接触子１０１には固定接点１０２が設けられている。また、回路遮断器には、可動接触子１０４を支持する可動接触子ホルダ１０５が設けられている。そして、可動接触子１０４は、可動接点１０４が固定接点１０２に接触したり、固定接点１０２から離間したりできるように可動子軸ピン１０８を中心として回動可能に構成されるとともに、接圧バネ１０６にて固定接点１０２の方向に付勢されている。また、可動接触子１０４の後端には可とう性のリード線１０７が接続され、可動接触子１０４はリード線１０７を介して接続板１０９に接続されている。さらに、回路遮断器には、可動接触子ホルダ１０５に接続された開閉機構部１１１が設けられている。そして、開閉機構部１１１は、ハンドル１１２の操作または電流検出部１１０の電流検出結果に基づいて、釈放動作時に可動接触子ホルダ１０５を回動運動させることができる。 In electrical equipment that handles large power, a circuit breaker is used to cut off a short-circuit current or a load current flowing through a load.
FIG. 4 is a cross-sectional view showing a schematic configuration of a conventional circuit breaker.
In FIG. 4, the circuit breaker is provided with a movable contact 104 and a fixed contact 101, a movable contact 103 is provided at the tip of the movable contact 104, and a fixed contact 102 is provided on the fixed contact 101. It has been. The circuit breaker is provided with a movable contact holder 105 that supports the movable contact 104. The movable contact 104 is configured to be rotatable about the mover shaft pin 108 so that the movable contact 104 can come into contact with or away from the fixed contact 102, and a contact pressure spring. 106 is biased toward the fixed contact 102. Further, a flexible lead wire 107 is connected to the rear end of the movable contact 104, and the movable contact 104 is connected to the connection plate 109 via the lead wire 107. Further, the circuit breaker is provided with an opening / closing mechanism 111 connected to the movable contact holder 105. Then, the opening / closing mechanism 111 can rotate the movable contact holder 105 during the release operation based on the operation of the handle 112 or the current detection result of the current detection unit 110.

ここで、定格電流が２５０Ａを超える回路遮断器では、リード線１０７が可動接触子ホルダ１０５の下方に直線的に配置され、可動接触子ホルダ１０５の回動軸はリード線１０７の上方に離間させて配置することが一般的に行われている。そして、リード線１０７には、最低でも数千回の屈曲に耐える柔軟性を付与しつつ、定格電流を流すのに十分な断面積を確保するために、極細の銅線を多数撚り合わせて一本のロープ状にした撚り銅線か、極細線を編み上げた編銅線が使用される。   Here, in a circuit breaker having a rated current exceeding 250 A, the lead wire 107 is linearly disposed below the movable contact holder 105, and the rotating shaft of the movable contact holder 105 is separated above the lead wire 107. It is generally done to arrange. The lead wire 107 is twisted with a large number of ultrafine copper wires in order to secure a sufficient cross-sectional area to allow the rated current to flow while providing flexibility to withstand at least several thousand bends. A stranded copper wire in the form of a rope or a knitted copper wire knitted from an extra fine wire is used.

また、例えば、特許文献１には、ケースに固定された固定接触子に対して開閉運動する可動接触子と前記ケースに固定された接続板とが可とうリード線で接続された回路遮断器において、接続板のリード線接続部を可動接触子の側方に配置し、リード線をＵ字状に曲げることにより、このリード線接続部と可動接触子とを接続する方法が開示されている。
特許第２５８３７９９号公報 Further, for example, Patent Document 1 discloses a circuit breaker in which a movable contact that opens and closes with respect to a fixed contact fixed to a case and a connection plate fixed to the case are connected by a flexible lead wire. A method of connecting the lead wire connecting portion and the movable contact by disposing the lead wire connecting portion of the connecting plate on the side of the movable contact and bending the lead wire in a U shape is disclosed.
Japanese Patent No. 2583799

しかしながら、リード線１０７を可動接触子ホルダ１０５の下方に直線的に配置する方法では、リード線１０７と可動接触子１０４との接合部の角度変化は小さいものの、可動接触子１０４の動きによって長さ方向の変位がリード線１０７に与えられる。そして、直線的に伸びたリード線１０７を長さ方向に押し縮めようとすると、リード線１０７が何箇所かで局部的に折れ曲るため、可動接触子１０４の回転運動の角度を大きくすることができなくなる。そして、可動接触子１０４に十分な回転角を与えられないと、遮断時に必要な接点ギャップを確保するために、可動接触子１０４の長さを長くする必要があり、回路遮断器の大型化を招くという問題があった。また、リード線１０７が直線的に伸びるため、リード線１０７のレイアウトに必要なスペースが増大し、回路遮断器のさらなる大型化を招くという問題があった。   However, in the method in which the lead wire 107 is linearly disposed below the movable contact holder 105, the change in the angle of the joint between the lead wire 107 and the movable contact 104 is small, but the length of the lead wire 107 depends on the movement of the movable contact 104. A displacement in the direction is applied to the lead wire 107. Then, if the lead wire 107 that extends linearly is compressed in the length direction, the lead wire 107 is locally bent at several places, so that the angle of the rotational movement of the movable contact 104 is increased. Can not be. If a sufficient rotation angle is not given to the movable contact 104, it is necessary to increase the length of the movable contact 104 in order to ensure a contact gap required at the time of breaking, and increase the size of the circuit breaker. There was a problem of inviting. Further, since the lead wire 107 extends linearly, the space required for the layout of the lead wire 107 increases, and there is a problem that the circuit breaker is further increased in size.

また、リード線１０７の局部的な屈曲の繰り返しに耐えるようにするためには、リード線１０７を構成する素線をより細くする必要があることから、腐食などの影響を受け易くなり、価格も高くなるという問題があった。
また、特許文献１に開示された方法では、接続板のリード線接続部を可動接触子の側方に配置する必要があり、多極遮断器では、接続板のレイアウトが困難になるという問題があった。
そこで、本発明の目的は、リード線の局部的な屈曲を防止しつつ、リード線に接続された可動接触子の回転運動の角度を大きくするとともに、リード線周りのコンパクト化を図ることが可能な回路遮断器を提供することである。 In addition, in order to withstand repeated repeated bending of the lead wire 107, it is necessary to make the wire constituting the lead wire 107 thinner, so that the lead wire 107 is easily affected by corrosion and the price. There was a problem of becoming higher.
Further, in the method disclosed in Patent Document 1, it is necessary to arrange the lead wire connecting portion of the connection plate on the side of the movable contact, and there is a problem that the layout of the connection plate becomes difficult in the multipolar circuit breaker. there were.
Accordingly, an object of the present invention is to increase the rotational movement angle of the movable contact connected to the lead wire and to reduce the size around the lead wire while preventing local bending of the lead wire. Is to provide a simple circuit breaker.

上述した課題を解決するために、請求項１記載の回路遮断器によれば、固定接点が設けられた固定接触子と、前記固定接点と開閉可能な可動接点が設けられた可動接触子と、前記可動接触子と接続板とを接続する可とう性のリード線と、前記可動接触子が回転軸の周りを回動可能なように前記可動接触子を保持する可動接触子ホルダとを備え、前記リード線は前記可動接触子の回転軸に巻き付くように配線され、前記可動接触子の回動に伴う前記リード線の変位が前記リード線の曲げ半径の変化で吸収されるように、前記リード線と前記可動接触子との接合部の位置が設定されていることを特徴とする。   In order to solve the above-described problem, according to the circuit breaker according to claim 1, a fixed contact provided with a fixed contact, a movable contact provided with a movable contact that can be opened and closed with the fixed contact, A flexible lead wire for connecting the movable contact and the connection plate; and a movable contact holder for holding the movable contact so that the movable contact can rotate around a rotation axis; The lead wire is wired so as to wrap around the rotating shaft of the movable contact, and the displacement of the lead wire accompanying the rotation of the movable contact is absorbed by a change in the bending radius of the lead wire. The position of the joint portion between the lead wire and the movable contact is set.

これにより、リード線を直線的に伸ばして配置する必要がなくなるとともに、リード線全体の外径を変化させながら可動接触子を回動させることができ、リード線を長さ方向に押し縮めることなく、可動接触子の回動に伴うリード線の変位をリード線に吸収させることができる。このため、リード線のレイアウトに必要なスペースを減らすことが可能となるとともに、可動接触子の回転運動の角度を大きくすることができ、可動接触子の長さを長くすることなく、遮断時に必要な接点ギャップを確保することが可能となることから、回路遮断器のコンパクト化を図ることが可能となる。   This eliminates the need for linearly extending the lead wire and allows the movable contact to be rotated while changing the outer diameter of the entire lead wire, without causing the lead wire to be compressed in the length direction. The lead wire can absorb the displacement of the lead wire accompanying the rotation of the movable contact. For this reason, it is possible to reduce the space required for the layout of the lead wires, increase the angle of the rotational movement of the movable contact, and it is necessary at the time of interruption without increasing the length of the movable contact Since it is possible to secure a large contact gap, the circuit breaker can be made compact.

また、可動接触子の回動に伴うリード線の変位をリード線全体に分散させることが可能となることから、リード線の屈曲が特定の箇所に集中して発生するのを防止することができる。このため、素線のより太いリード線を使用することが可能となり、腐食などの影響を受け難くすることが可能となるとともに、価格も低く抑えることができる。   Further, since the displacement of the lead wire accompanying the rotation of the movable contact can be dispersed throughout the lead wire, it is possible to prevent the bending of the lead wire from concentrating on a specific location. . For this reason, it is possible to use a thicker lead wire, and it is possible to make it difficult to be affected by corrosion and the like, and it is possible to keep the price low.

また、請求項２記載の回路遮断器によれば、前記可動接触子ホルダの回転軸と前記可動接触子の回転軸とは同軸になるように配置され、前記リード線は、前記可動接触子の回転軸に１／２回転以上巻き付けられるとともに、前記リード線と前記可動接触子との接合部の回転軌道に対してほぼ接線方向に引き出されるように配線されていることを特徴とする。
これにより、可動接触子の回動に伴うリード線の変位をリード線の曲げ半径の変化で吸収させることが可能となり、リード線の局部的な屈曲を防止することが可能となるとともに、リード線を直線的に伸ばして配置する必要がなくなり、回路遮断器のコンパクト化、低価格化および高性能化を図ることができる。 According to the circuit breaker of the second aspect, the rotation axis of the movable contact holder and the rotation axis of the movable contact are arranged so as to be coaxial, and the lead wire is connected to the movable contact. It is characterized in that it is wound around the rotating shaft by 1/2 turn or more and wired so as to be drawn almost in the tangential direction with respect to the rotating track of the joint portion between the lead wire and the movable contact.
As a result, it is possible to absorb the displacement of the lead wire due to the rotation of the movable contact by the change of the bending radius of the lead wire, it is possible to prevent local bending of the lead wire, and The circuit breaker can be made compact, low in price, and high in performance.

以上説明したように、本発明によれば、リード線のレイアウトに必要なスペースを減らすことが可能となるとともに、リード線の屈曲が特定の箇所に集中して発生するのを防止することができ、回路遮断器のコンパクト化、低価格化および高性能化を図ることができる。   As described above, according to the present invention, it is possible to reduce the space necessary for the layout of the lead wire and to prevent the bending of the lead wire from concentrating on a specific portion. The circuit breaker can be made compact, low in price and high in performance.

以下、本発明の実施形態に係る回路遮断器について図面を参照しながら説明する。
図１は、本発明の一実施形態に係る回路遮断器の概略構成を示す断面図、図２は、図１の回路遮断器の可とうリード線の周囲の概略構成を示す斜視図、図３は、図１の回路遮断器の開放状態を示す断面図である。
図１において、回路遮断器には、可動接触子４および固定接触子１が設けられ、可動接触子４の先端には可動接点３が設けられるとともに、固定接触子１には固定接点２が設けられている。また、回路遮断器には、可動接触子４を支持する可動接触子ホルダ５が設けられている。そして、可動接触子４は、可動接点４が固定接点１に接触したり、固定接点１から離間したりできるように可動子軸ピン８を中心として回動可能に構成されるとともに、接圧バネ６にて固定接点１の方向に付勢されている。ここで、可動子軸ピン８は、樹脂製の可動接触子ホルダ５に保持され、可動接点４は接圧バネ６にて固定接点１に押し付けられている。さらに、可動接触子ホルダ５の回転軸は可動子軸ピン８と同軸になるように配置されている。 Hereinafter, a circuit breaker according to an embodiment of the present invention will be described with reference to the drawings.
1 is a sectional view showing a schematic configuration of a circuit breaker according to an embodiment of the present invention, FIG. 2 is a perspective view showing a schematic configuration around a flexible lead of the circuit breaker of FIG. FIG. 2 is a cross-sectional view showing an open state of the circuit breaker of FIG. 1.
In FIG. 1, the circuit breaker is provided with a movable contact 4 and a fixed contact 1, a movable contact 3 is provided at the tip of the movable contact 4, and a fixed contact 2 is provided at the fixed contact 1. It has been. Further, the circuit breaker is provided with a movable contact holder 5 that supports the movable contact 4. The movable contact 4 is configured to be rotatable about the mover shaft pin 8 so that the movable contact 4 can come into contact with the fixed contact 1 or be separated from the fixed contact 1, and a contact pressure spring. 6 is biased in the direction of the fixed contact 1. Here, the mover shaft pin 8 is held by a resin movable contact holder 5, and the movable contact 4 is pressed against the fixed contact 1 by a contact pressure spring 6. Further, the rotating shaft of the movable contact holder 5 is arranged so as to be coaxial with the movable member shaft pin 8.

また、可動接触子４の後端には可とう性のリード線７が接続され、可動接触子４はリード線７を介して接続板９に接続されている。さらに、回路遮断器には、可動接触子ホルダ５に接続された開閉機構部１１が設けられている。そして、開閉機構部１１は、ハンドル１２の操作または電流検出部１０の電流検出結果に基づいて、釈放動作時に可動接触子ホルダ５を回動運動させることができる。   Further, a flexible lead wire 7 is connected to the rear end of the movable contact 4, and the movable contact 4 is connected to the connection plate 9 via the lead wire 7. Further, the circuit breaker is provided with an opening / closing mechanism 11 connected to the movable contact holder 5. The opening / closing mechanism 11 can rotate the movable contact holder 5 during the release operation based on the operation of the handle 12 or the current detection result of the current detector 10.

なお、一つの筐体には、複数極の開閉回路を組み込み、一極の開閉回路は一対の接点によって開閉することができる。そして、各相の可動接触子ホルダ５は、回動運動可能に支持された１個の可動接触子ホルダ５にて各相独立に回動可能に支持される
ここで、リード線７は可動子軸ピン８に巻き付くように配線し、可動接触子４の回動に伴うリード線７の変位がリード線７の曲げ半径の変化で吸収されるように、リード線７と可動接触子４との接合部の位置を設定することができる。例えば、リード線７は、可動子軸ピン８に１／２回転以上巻き付けられるとともに、リード線７と可動接触子４との接合部の回転軌道に対してほぼ接線方向に引き出されるように配線することができる。 Note that a single-pole switching circuit can be opened and closed by a pair of contacts in a single housing. The movable contact holder 5 of each phase is supported so as to be able to rotate independently for each phase by one movable contact holder 5 supported so as to be able to rotate. Here, the lead wire 7 is a movable element. The lead wire 7 and the movable contact 4 are arranged so as to be wound around the shaft pin 8 so that the displacement of the lead wire 7 accompanying the rotation of the movable contact 4 is absorbed by the change in the bending radius of the lead wire 7. The position of the joint can be set. For example, the lead wire 7 is wound around the mover shaft pin 8 by 1/2 turn or more and wired so as to be drawn in a substantially tangential direction with respect to the rotation trajectory of the joint portion between the lead wire 7 and the movable contact 4. be able to.

具体的には、図２に示すように、リード線７は、可動子軸ピン８に巻き付くように可動接触子４の両側に配置し、可動子軸ピン８から離れている部分も含めて可動子軸ピン８の周りを約３／４周させることができる。
そして、接続板９を介して負荷に電流を流す場合、図１に示すように、可動接触子４を固定接点２側の方向に回転させ、可動接点３を固定接点２に接触させることにより、可動接点３と固定接点２とを閉じる。そして、可動接点３と固定接点２とが閉じられると、固定接触子１→固定接点２→可動接点３→可動接触子４→リード線７→接続板９という経路で負荷に電流が流れる。 Specifically, as shown in FIG. 2, the lead wire 7 is disposed on both sides of the movable contact 4 so as to be wound around the mover shaft pin 8, and includes a portion away from the mover shaft pin 8. The armature shaft pin 8 can be rotated about 3/4 round.
When a current is passed to the load via the connection plate 9, as shown in FIG. 1, the movable contact 4 is rotated in the direction toward the fixed contact 2, and the movable contact 3 is brought into contact with the fixed contact 2. The movable contact 3 and the fixed contact 2 are closed. Then, when the movable contact 3 and the fixed contact 2 are closed, a current flows to the load through a path of the fixed contact 1 → the fixed contact 2 → the movable contact 3 → the movable contact 4 → the lead wire 7 → the connection plate 9.

一方、短絡電流または負荷電流を遮断する場合、図３に示すように、開閉機構部１１は、ハンドル１２の操作または電流検出部１０の電流検出結果に基づいて可動接触子ホルダ５を回動運動させることにより、可動接触子４を固定接点２側と反対の方向に回転させ、可動接点３を固定接点２から引き離すことにより、負荷に流れる電流を遮断する。   On the other hand, when the short circuit current or the load current is interrupted, as shown in FIG. 3, the opening / closing mechanism unit 11 rotates the movable contact holder 5 based on the operation of the handle 12 or the current detection result of the current detection unit 10. As a result, the movable contact 4 is rotated in the direction opposite to the fixed contact 2 side, and the movable contact 3 is separated from the fixed contact 2, thereby interrupting the current flowing through the load.

ここで、可動子軸ピン８に１／２回転以上巻き付けながら、リード線７と可動接触子４との接合部の回転軌道に対してほぼ接線方向に引き出されるようにリード線７を配線することにより、可動接触子ホルダ５の下方にリード線７を直線的に伸ばして配置する必要がなくなるとともに、リード線７全体の外径を変化させながら可動接触子４を回動させることができ、リード線７を長さ方向に押し縮めることなく、可動接触子４の回動に伴うリード線７の変位をリード線７に吸収させることができる。このため、リード線７のレイアウトに必要なスペースを減らすことが可能となるとともに、可動接触子４の回転運動の角度を大きくすることができ、可動接触子４の長さを長くすることなく、遮断時に必要な接点ギャップを確保することが可能となることから、回路遮断器のコンパクト化を図ることが可能となる。   Here, the lead wire 7 is wired so as to be drawn in a substantially tangential direction with respect to the rotation trajectory of the joint portion of the lead wire 7 and the movable contact 4 while being wound around the mover shaft pin 8 by 1/2 turn or more. This eliminates the need for linearly extending the lead wire 7 below the movable contact holder 5 and allows the movable contact 4 to be rotated while changing the outer diameter of the lead wire 7 as a whole. The displacement of the lead wire 7 accompanying the rotation of the movable contact 4 can be absorbed by the lead wire 7 without compressing the wire 7 in the length direction. For this reason, it becomes possible to reduce the space required for the layout of the lead wire 7, and the angle of the rotational movement of the movable contact 4 can be increased, without increasing the length of the movable contact 4. Since it becomes possible to secure a contact gap necessary for breaking, the circuit breaker can be made compact.

また、可動接触子４の回動に伴うリード線７の変位をリード線７全体に分散させることが可能となることから、リード線７の屈曲が特定の箇所に集中して発生するのを防止することができる。このため、素線のより太いリード線７を使用することが可能となり、腐食などの影響を受け難くすることが可能となるとともに、価格も低く抑えることができる。   Further, since the displacement of the lead wire 7 accompanying the rotation of the movable contact 4 can be dispersed throughout the lead wire 7, it is possible to prevent the bending of the lead wire 7 from concentrating on a specific location. can do. For this reason, it becomes possible to use the lead wire 7 with a thicker element wire, making it difficult to be affected by corrosion and the like, and reducing the price.

例えば、図４の従来例では、可とう性の長さ３９ｍｍのリード線１０７を使って、可動接触子１０４の開閉時の回転角度は約１３度しか確保できなかったものが、図１の本実施形態では、長さ３６ｍｍのリード線７を使って、開閉時の可動接触子４、４´の回転角度は２６度以上を確保することができ、２倍の動作角度を達成することができる。このため、リード線７のスペースおよび可動接触子４の長さをともに短縮することができ、回路遮断器のコンパクト化を図ることが可能となった。
また、図４の従来例では、素線径０．０５ｍｍの極細線でリード線１０７が構成されていたものが、図１の本実施形態では、素線径０．１ｍｍでリード線７の動きを無理なく吸収させることができ、リード線７の価格を低く抑えることができた。 For example, in the conventional example of FIG. 4, the flexible lead wire 107 having a length of 39 mm was used, and the rotation angle when the movable contact 104 was opened and closed could be secured only about 13 degrees. In the embodiment, by using the lead wire 7 having a length of 36 mm, the rotation angle of the movable contacts 4, 4 ′ during opening and closing can be ensured to be 26 degrees or more, and a double operation angle can be achieved. . For this reason, both the space of the lead wire 7 and the length of the movable contact 4 can be shortened, and the circuit breaker can be made compact.
Further, in the conventional example of FIG. 4, the lead wire 107 is configured by an ultrafine wire having a strand diameter of 0.05 mm, but in this embodiment of FIG. 1, the movement of the lead wire 7 with a strand diameter of 0.1 mm. Can be absorbed without difficulty, and the price of the lead wire 7 can be kept low.

本発明の一実施形態に係る回路遮断器の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the circuit breaker which concerns on one Embodiment of this invention. 図１の回路遮断器の可とうリード線の周囲の概略構成を示す斜視図である。It is a perspective view which shows schematic structure of the circumference | surroundings of the flexible lead wire of the circuit breaker of FIG. 図１の回路遮断器の開放状態を示す断面図である。It is sectional drawing which shows the open state of the circuit breaker of FIG. 従来の回路遮断器の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the conventional circuit breaker.

符号の説明Explanation of symbols

１ 固定接触子
２ 固定接点
３ 可動接点
４、４´ 可動接触子
５ 可動接触子ホルダ
６ 接圧バネ
７ リード線
８ 可動子軸ピン
９ 接続板
１０ 電流検出部
１１ 開閉機構部
１２ ハンドル DESCRIPTION OF SYMBOLS 1 Fixed contact 2 Fixed contact 3 Movable contact 4, 4 'Movable contact 5 Movable contact holder 6 Contact pressure spring 7 Lead wire 8 Movable child shaft pin 9 Connection board 10 Current detection part 11 Opening and closing mechanism part 12 Handle

Claims (2)

固定接点が設けられた固定接触子と、
前記固定接点と開閉可能な可動接点が設けられた可動接触子と、
前記可動接触子と接続板とを接続する可とう性のリード線と、
前記可動接触子が回転軸の周りを回動可能なように前記可動接触子を保持する可動接触子ホルダとを備え、
前記リード線は前記可動接触子の回転軸に巻き付くように配線され、前記可動接触子の回動に伴う前記リード線の変位が前記リード線の曲げ半径の変化で吸収されるように、前記リード線と前記可動接触子との接合部の位置が設定されていることを特徴とする回路遮断器。 A fixed contact provided with a fixed contact;
A movable contact provided with a movable contact that can be opened and closed with the fixed contact;
A flexible lead wire connecting the movable contact and the connection plate;
A movable contact holder for holding the movable contact so that the movable contact can rotate around a rotation axis;
The lead wire is wired so as to wrap around the rotating shaft of the movable contact, and the displacement of the lead wire accompanying the rotation of the movable contact is absorbed by a change in the bending radius of the lead wire. A circuit breaker characterized in that a position of a joint portion between a lead wire and the movable contact is set. 前記可動接触子ホルダの回転軸と前記可動接触子の回転軸とは同軸になるように配置され、前記リード線は、前記可動接触子の回転軸に１／２回転以上巻き付けられるとともに、前記リード線と前記可動接触子との接合部の回転軌道に対してほぼ接線方向に引き出されるように配線されていることを特徴とする請求項１記載の回路遮断器。   The rotation axis of the movable contact holder and the rotation axis of the movable contact are arranged so as to be coaxial, and the lead wire is wound around the rotation axis of the movable contact more than 1/2 turn and the lead 2. The circuit breaker according to claim 1, wherein the circuit breaker is wired so as to be drawn substantially in a tangential direction with respect to a rotation trajectory of a joint portion between the wire and the movable contact.
JP2006136740A 2006-05-16 2006-05-16 Circuit breaker Active JP4816241B2 (en)

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CN2007101038311A CN101075513B (en) 2006-05-16 2007-05-16 Circuit circuit-breaker

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CN103617927A (en) * 2013-11-26 2014-03-05 浙江天正智能电器有限公司 Long-break-distance contact structure capable of breaking rapidly

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JPH08257758A (en) * 1995-03-22 1996-10-08 Honda Motor Co Ltd Power feeding mechanism and method therefor
JP2000323003A (en) * 1999-05-10 2000-11-24 Mitsubishi Electric Corp Circuit breaker
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102789930A (en) * 2011-05-18 2012-11-21 富士电机机器制御株式会社 Circuit breaker
CN103617927A (en) * 2013-11-26 2014-03-05 浙江天正智能电器有限公司 Long-break-distance contact structure capable of breaking rapidly

Also Published As

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JP4816241B2 (en) 2011-11-16
CN101075513B (en) 2010-06-23
KR100885334B1 (en) 2009-02-26
CN101075513A (en) 2007-11-21
KR20070111341A (en) 2007-11-21

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