JPWO2013171837A1

JPWO2013171837A1 - Circuit breaker

Info

Publication number: JPWO2013171837A1
Application number: JP2014515381A
Authority: JP
Inventors: 真一千種
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2012-05-15
Filing date: 2012-05-15
Publication date: 2016-01-07
Anticipated expiration: 2032-05-15
Also published as: KR20150004827A; KR101684760B1; CN104303252B; CN104303252A; WO2013171837A1; JP5714181B2

Abstract

回路遮断器筐体１０１ｃ内に開閉機構部５１とこの開閉機構部に連結され前記開閉機構部の動作により回動する保持部材１１とこの保持部材に保持された可動接触子１０と前記保持部材の回動に伴って回動する可動接触子が開閉する固定接触子８とを内蔵している回路遮断器において、前記保持部材を回動可能に支持する支持部の支承面の前記保持部材の回動の回動中心方向に見た形状と、前記支持部の支承面によって支承される前記保持部材の被支承面の前記回動中心方向に見た形状とが異なる形状に形成され、前記開の状態における前記保持部材の第一軸心１１ｂの位置と前記可動接触子の閉の状態における前記保持部材の第二軸心１１ｃの位置とが異なる位置となり、可動接触子の投入力が増大する。An opening / closing mechanism 51 in the circuit breaker casing 101c, a holding member 11 connected to the opening / closing mechanism and rotated by the operation of the opening / closing mechanism, the movable contact 10 held by the holding member, and the holding member In a circuit breaker having a built-in fixed contact 8 that opens and closes a movable contact that rotates with rotation, the rotation of the holding member on the support surface of a support portion that supports the holding member rotatably. The shape seen in the direction of rotation center of movement is different from the shape seen in the direction of rotation center of the supported surface of the holding member supported by the support surface of the support part, The position of the first axis 11b of the holding member in the state is different from the position of the second axis 11c of the holding member in the closed state of the movable contact, and the throwing force of the movable contact increases.

Description

この発明は、配線用遮断器や漏電遮断器などの回路遮断器に関し、詳しくは開閉接点における接圧の確保に関するものである。 The present invention relates to a circuit breaker such as a circuit breaker for wiring or a leakage breaker, and more particularly to securing a contact pressure at a switching contact.

回路遮断器には、電路の開閉を行うため可動接触子を接離するための機構部と、電線や負荷機器の焼損を未然に防止するため過電流や短絡電流が流れたことを感知し機構を引き外す引き外し部と、可動接触子と接離する固定接触子を有し大電流遮断によるアークを消弧するための消弧部とそれを一体に組み込む略直方体形状の筐体から成ることが一般的であり、各部位のスペース配分により各部位の機能裕度や品質や製造コストが変化するため、各部位のスペースバランスが重要である。しかしながら、近年の回路遮断器のニーズとして小型化・高遮断容量化があり、スペース配分だけでは製品性能を満足できず、デットスペースの有効活用を実施するアイデアが必須となってきた（特許文献１参照。）。 The circuit breaker has a mechanism for moving the movable contact to open and close the electric circuit, and a mechanism to detect the overcurrent and short circuit current to prevent the wire and load equipment from burning out. It consists of a tripping part that pulls off the door, a stationary contact that contacts and separates from the movable contact, and an arc extinguishing part for extinguishing the arc caused by a large current interruption, and a substantially rectangular parallelepiped housing that integrates it. However, since the functional tolerance, quality, and manufacturing cost of each part change depending on the space allocation of each part, the space balance of each part is important. However, recent needs for circuit breakers include miniaturization and high breaking capacity, and product performance cannot be satisfied only by space allocation, and an idea to effectively use dead space has become essential (Patent Document 1). reference.).

特開２０００−２６０２９１号公報（図１２）JP 2000-260291 A (FIG. 12)

一般的に回路遮断器は、電路の開閉を実施するために可動接点を有する可動接触子を機構部により固定接点を有する固定接触子と接離しているが、閉路時には両接点間の接触抵抗を低く安定化するため、所定の値より大きい力で押し付けなければならない。そのため、回路遮断器ではこの力を生み出すために可動接触子を保持するクロスバーと可動接触子との間に介在させた接圧バネにより可動接触子を固定接点方向に押し込む押し込み力を発生させ、接触抵抗の低減を図っている。
しかし、この押し込み力は、クロスバーに対し反閉路方向のモーメント（ここでは反抗力と呼ぶ）を発生させ、機構部による閉路させようとするモーメント（ここでは投入力と呼ぶ）を阻害する。このクロスバーへの反抗力が、機構部による投入力を超えてしまうと可動接触子を押し込む押し込み力が弱くなってしまい、接触抵抗が増大し回路遮断器の発熱による回路の断線などが危惧される。よって、反抗力と投入力とでは、投入力の方が大きくなるように、ある程度の裕度を持って設定する必要がある。
一方、機構部による投入力は各支点の位置、各部品どうしの摩擦、ばね力により一意に決まる。支点の位置についてはスペースや固定接触子の開極スピード等の制約があり、ばね力については各部品の強度に制約があり、投入力についても前述より制約がある。以上より機構部としていかに省スペースにて投入力を確保するかが命題となっている。In general, a circuit breaker has a movable contact having a movable contact in contact with and away from a fixed contact having a fixed contact by a mechanical unit in order to open and close an electric circuit. In order to stabilize low, it must be pressed with a force greater than a predetermined value. Therefore, in the circuit breaker, in order to generate this force, a pressing force that pushes the movable contact toward the fixed contact is generated by a contact pressure spring interposed between the cross bar that holds the movable contact and the movable contact, The contact resistance is reduced.
However, this pushing force generates a moment in the anti-close direction in the crossbar (referred to here as a repulsive force) and inhibits a moment (herein referred to as throwing-in force) to be closed by the mechanism. If the reaction force against the crossbar exceeds the throwing force by the mechanism, the pushing force to push the movable contact will be weakened, and the contact resistance will increase, causing circuit breakage due to the heat generated by the circuit breaker. . Therefore, it is necessary to set the resistance and throwing input with a certain degree of margin so that the throwing input becomes larger.
On the other hand, the throwing input by the mechanism is uniquely determined by the position of each fulcrum, the friction between the components, and the spring force. There are restrictions on the position of the fulcrum, such as the space and the opening speed of the fixed contact, the spring force is restricted in the strength of each component, and the input and output is also restricted as described above. From the above, the proposition is how to secure the input and output in a space-saving manner as the mechanism section.

上述の背景のように回路遮断器の小型化・高遮断容量化が進むにつれて、投入力の確保が難しくなっていく。
この発明は、投入力を増大させることができる回路遮断器を得ることを目的とするものである。As described above, as the circuit breaker becomes smaller and has a higher breaking capacity, it becomes difficult to secure the input and output.
An object of this invention is to obtain the circuit breaker which can increase a throwing input.

この発明に係る回路遮断器は、回路遮断器筐体内に開閉機構部とこの開閉機構部に連結され前記開閉機構部の動作により回動する保持部材とこの保持部材に保持された可動接触子と前記保持部材の回動に伴って回動する可動接触子が開閉する固定接触子とを内蔵している回路遮断器において、前記保持部材を回動可能に支持する支持部の支承面の前記保持部材の回動の回動中心方向に見た形状と、前記支持部の支承面によって支承される前記保持部材の被支承面の前記回動中心方向に見た形状とが異なる形状に形成され、前記開の状態における前記保持部材の第一軸心の位置と前記可動接触子の閉の状態における前記保持部材の第二軸心の位置とが異なる位置となり、可動接触子の投入力が増大する。 A circuit breaker according to the present invention includes an opening / closing mechanism portion in a circuit breaker housing, a holding member connected to the opening / closing mechanism portion and rotated by the operation of the opening / closing mechanism portion, and a movable contact held by the holding member. In the circuit breaker having a built-in fixed contact that opens and closes a movable contact that rotates as the holding member rotates, the holding of the support surface of the support portion that rotatably supports the holding member The shape seen in the rotation center direction of the rotation of the member and the shape seen in the rotation center direction of the supported surface of the holding member supported by the support surface of the support portion are formed in different shapes, The position of the first axial center of the holding member in the open state and the position of the second axial center of the holding member in the closed state of the movable contact become different positions, and the input / output of the movable contact increases. .

この発明は以上説明したように、回路遮断器筐体内に開閉機構部とこの開閉機構部に連結され前記開閉機構部の動作により回動する保持部材とこの保持部材に保持された可動接触子と前記保持部材の回動に伴って回動する可動接触子が開閉する固定接触子とを内蔵している回路遮断器において、前記保持部材を回動可能に支持する支持部の支承面の前記保持部材の回動の回動中心方向（図６において紙面に鉛直の方向）に見た形状と、前記支持部の支承面によって支承される前記保持部材の被支承面の前記回動中心方向に見た形状とが異なる形状に形成され、前記開の状態における前記保持部材の第一軸心の位置と前記可動接触子の閉の状態における前記保持部材の第二軸心の位置とが異なる位置となるので、投入力を増大させることができる。 As described above, the present invention includes an opening / closing mechanism portion in the circuit breaker housing, a holding member connected to the opening / closing mechanism portion and rotated by the operation of the opening / closing mechanism portion, and a movable contact held by the holding member. In the circuit breaker having a built-in fixed contact that opens and closes a movable contact that rotates as the holding member rotates, the holding of the support surface of the support portion that rotatably supports the holding member The shape seen in the rotation center direction of the rotation of the member (direction perpendicular to the paper surface in FIG. 6) and the rotation center direction of the supported surface of the holding member supported by the support surface of the support portion. A position different from the position of the first axis of the holding member in the open state and the position of the second axis of the holding member in the closed state of the movable contact. So the throwing input can be increased. .

この発明の実施の形態１を示す回路遮断器の外観斜視図である。It is an external appearance perspective view of the circuit breaker which shows Embodiment 1 of this invention. 図１における可動接触子部を示す分解斜視図である。It is a disassembled perspective view which shows the movable contact part in FIG. この発明の実施の形態１を示す回路遮断器の側面断面図、（ａ）はＯＦＦ状態、（ｂ）はＯＮ状態である。Side surface sectional drawing of the circuit breaker which shows Embodiment 1 of this invention, (a) is an OFF state, (b) is an ON state. 図１における開閉機構部の分解斜視図である。It is a disassembled perspective view of the opening-and-closing mechanism part in FIG. 図１における可動接触子部の斜視図である。It is a perspective view of the movable contact part in FIG. 図５にＢ−Ｂ線において矢印方向に見た一部断面の要部の側面図で、（ａ）はＯＦＦ状態を、（ｂ）はＯＮ状態を、それぞれ示す図である。FIGS. 5A and 5B are side views of a main part of a partial cross section seen in the direction of the arrows along the line BB, in which FIG. 5A shows an OFF state and FIG. 5B shows an ON state. この発明の実施の形態２を示す一部断面の要部の側面図で、図６（ｂ）に対応する図ある。It is a side view of the principal part of the partial cross section which shows Embodiment 2 of this invention, and is a figure corresponding to FIG.6 (b). 従来の回路遮断器を示す側面断面図である。It is side surface sectional drawing which shows the conventional circuit breaker. 従来の回路遮断器における可動接触子部を示す側面断面図で、図６（ｂ）に対応する図である。It is side surface sectional drawing which shows the movable contact part in the conventional circuit breaker, and is a figure corresponding to FIG.6 (b).

実施の形態１．
図１〜図６はこの発明の実施の形態１における回路遮断器の一例を示すものであり、詳しくは、図１はトリップ状態の斜視図であって、（ａ）は外観を、（ｂ）は（ａ）よりカバーを外した図を、（ｃ）は（ｂ）より開閉機構部を抜き出したところを、それぞれ示している。図２は、開路状態の可動接触子部を示す分解斜視図で、（ａ）は概観を、（ｂ）はクロスバーから可動接触子を引き抜いた状態を、（ｃ）は（ｂ）の可動接触子をさらに分解した状態を、それぞれ示している。図３は、回路遮断器の（図１に付記した線Ａ−Ａに沿う）側面断面図で、（ａ）はＯＦＦ状態を、（ｂ）はＯＮ状態を示している。図４は図１における開閉機構部の分解斜視図、図５は図１における可動接触子部の分解斜視図である。図６は可動接触子部の（図４に付記した線Ｂ−Ｂに沿う）側面断面図で、（ａ）はＯＦＦ状態、（ｂ）はＯＮ状態を示している。
また、図８は図３に対応した従来の回路遮断器を示す側面断面図、図９は図６（ｂ）に対応した従来の可動接触子部を示す側面断面図である。Embodiment 1 FIG.
FIGS. 1-6 shows an example of the circuit breaker in Embodiment 1 of this invention. Specifically, FIG. 1 is a perspective view of a trip state, (a) is an external appearance, (b) (A) shows a view with the cover removed, and (c) shows a state in which the opening / closing mechanism is extracted from (b). FIGS. 2A and 2B are exploded perspective views showing the movable contact portion in an open circuit state. FIG. 2A is an overview, FIG. 2B is a state in which the movable contact is pulled out from the crossbar, and FIG. The state which further decomposed | disassembled the contactor is each shown. 3A and 3B are side cross-sectional views (along line AA added to FIG. 1) of the circuit breaker, where FIG. 3A shows an OFF state and FIG. 3B shows an ON state. 4 is an exploded perspective view of the opening / closing mechanism portion in FIG. 1, and FIG. 5 is an exploded perspective view of the movable contact portion in FIG. 6A and 6B are side cross-sectional views (along line BB added to FIG. 4) of the movable contact portion, where FIG. 6A shows an OFF state and FIG. 6B shows an ON state.
8 is a side sectional view showing a conventional circuit breaker corresponding to FIG. 3, and FIG. 9 is a side sectional view showing a conventional movable contact portion corresponding to FIG. 6B.

図１において、３極用の回路遮断器１０１の絶縁筐体１０１ｃは、カバー１及びベース２により構成され、このうちベース２に、ハンドル３を備えた開閉機構部５１と、極数分（この場合、３個）の消弧ユニット５２及び過電流引き外し装置５３が配設されている。ハンドル３はその取っ手部３ａがカバー１のハンドル用窓孔１ａから突出していることで、ＯＮあるいはＯＦＦ方向へ操作可能な点、及び消弧ユニット５２と過電流引き外し装置５３の位置関係より、４が電源側端子、５が負荷側端子である点は、それぞれ周知の通りである。 In FIG. 1, an insulating casing 101c of a circuit breaker 101 for three poles is constituted by a cover 1 and a base 2, and among these, an opening / closing mechanism 51 having a handle 3 and a number of poles (this number) In this case, three arc extinguishing units 52 and an overcurrent tripping device 53 are provided. The handle 3 has a handle portion 3a protruding from the handle window hole 1a of the cover 1 so that the handle 3 can be operated in the ON or OFF direction, and the positional relationship between the arc extinguishing unit 52 and the overcurrent tripping device 53, It is well known that 4 is a power supply side terminal and 5 is a load side terminal.

この図１には、回路遮断器の構成要素として周知である、開閉機構部５１、消弧ユニット５２、ならびに過電流引き外し装置５３を示している。すなわち、電源側端子４より延設され、一端に固定接点７を有する固定接触子８（いずれも図３参照）と、過電流引き外し装置５３を介して負荷側端子５に接続され、一端に可動接点９を有する可動接触子１０と、の間で接離が繰り返される。この接離のうち、特に開離によって、固定接点７と可動接点９との間で発生するアークを消弧ユニット５２にて裁断している。また、可動接触子１０は、開閉機構部５１を構成する一部材であり例えば樹脂成形品で形成されるクロスバー１１によって保持される。このクロスバー１１は一般的にはベース２により支承されている（図１（ｃ）参照）。なお、請求項で述べた「保持部材」とは、ここではクロスバー１１を指している。 FIG. 1 shows an opening / closing mechanism 51, an arc extinguishing unit 52, and an overcurrent tripping device 53, which are well known as components of a circuit breaker. That is, it is connected to the load-side terminal 5 via a stationary contact 8 (both see FIG. 3) extending from the power-side terminal 4 and having a stationary contact 7 at one end and an overcurrent tripping device 53, and at one end. Contact and separation are repeated between the movable contact 10 having the movable contact 9. Of this contact / separation, an arc generated between the fixed contact 7 and the movable contact 9 is cut by the arc-extinguishing unit 52, particularly by separation. The movable contact 10 is a member constituting the opening / closing mechanism 51 and is held by a cross bar 11 formed of, for example, a resin molded product. The cross bar 11 is generally supported by the base 2 (see FIG. 1C). The “holding member” described in the claims refers to the crossbar 11 here.

図２（ｃ）に示すように、可動接触子１０は、一端に可動接点９が設けられ、他端に可動接触子１０の回動中心となる軸孔１０ａが設けられている。摺動接触子１４は、その軸支部１４ａにおいて可動接触子１０を回動自在に挟持している。接圧バネ１５は、図２（ｂ）に示すように、摺動接触子１４の軸支部１４ａの外側に設けられ、摺動接触子１４と可動接触子１０とが接触する接触圧力を与える。また、接圧バネ１５の中央部１５ｃは可動接触子１０に係合されて、可動接触子１０が固定接触子８と接触（図３参照）するときに、可動接触子１０に固定接触子８との接圧を与えている。 As shown in FIG. 2C, the movable contact 10 is provided with a movable contact 9 at one end, and a shaft hole 10 a that is a rotation center of the movable contact 10 at the other end. The sliding contact 14 holds the movable contact 10 in a pivotable manner at its shaft support portion 14a. As shown in FIG. 2B, the contact pressure spring 15 is provided on the outer side of the shaft support portion 14 a of the sliding contact 14, and applies a contact pressure at which the sliding contact 14 and the movable contact 10 come into contact with each other. Further, the central portion 15c of the contact pressure spring 15 is engaged with the movable contact 10 so that the movable contact 10 contacts the fixed contact 8 when the movable contact 10 contacts the fixed contact 8 (see FIG. 3). The contact pressure is given.

クロスバー１１は、図２（ａ）に示すように、摺動接触子１４の軸支部１４ａを回動中心とする可動接触子１０を内設しており、さらに、接圧バネ１５によって、この可動接触子１０を、図２紙面上、時計方向（以下、「時計方向」「反時計方向」と記するとき、その方向は「紙面上」を基準とし、以ってその記載は省略する）に付勢させている。このため、図3（ｂ）で示すＯＮ状態では、固定接点７と可動接点９の間が、適切な接触抵抗によって、その電気的接続が保たれることになる。 As shown in FIG. 2 (a), the cross bar 11 has a movable contact 10 centered on the pivotal support portion 14 a of the sliding contact 14, and further, a contact spring 15 The movable contact 10 is clockwise in FIG. 2 (referred to as “clockwise” and “counterclockwise” hereinafter, the direction is based on “on the paper” and the description is omitted). Is energized. For this reason, in the ON state shown in FIG. 3B, the electrical connection between the fixed contact 7 and the movable contact 9 is maintained by an appropriate contact resistance.

次に、開閉機構部５１の構成について説明する。図４に示すように、開閉機構部５１は、相対向する一対のフレーム板１２Ａ・１２Ｂによって形成されるフレーム１２に、回動自由に軸支された略Ｕ字型のハンドルアーム１３、このハンドルアーム１３に固着されるハンドル３によって、いわゆるユニット化されている。フレーム１２は、その（紙面上）下部が、ベース２に形成されたＵ溝２ａ（図１参照）を軸として回動するクロスバー１１の、その回動範囲に沿った形状を持ち、このベース２に固定されている。 Next, the configuration of the opening / closing mechanism 51 will be described. As shown in FIG. 4, the opening / closing mechanism 51 includes a substantially U-shaped handle arm 13 rotatably supported on a frame 12 formed by a pair of opposed frame plates 12A and 12B. A so-called unit is formed by the handle 3 fixed to the arm 13. The lower portion of the frame 12 (on the paper) has a shape along the rotation range of the cross bar 11 that rotates about the U groove 2a (see FIG. 1) formed in the base 2. 2 is fixed.

ここまでの説明で明らかなように、ハンドル３の操作によって可動接触子１０の開閉を司ることが開閉機構部５１の役割となるが、その「機構」は、やはり周知であるトグルリンク機構ＴＭを、ここでは採用している。ここで、このトルグリンク機構ＴＭは、図２及び図３を参照しつつ、スプリングピン１６によって互いに回動自由に連結された上リンク１７と下リンク１８、いずれもフレーム１２上に回動自由となるように設けられたハンドルアーム１３、レバー１９、及びラッチ２０、このラッチ２０の反時計方向の回転を阻止するトリップバー２１、このトリップバー２１を時計方向に付勢するラッチバネ２２（図１参照）、スプリングピン１６とハンドルアーム１３との間に張架されたメインバネ２３（図３にて便宜上、一点鎖線で表示）の各部材にて構成されている。 As is apparent from the above description, the opening / closing mechanism 51 plays a role in controlling the opening / closing of the movable contact 10 by operating the handle 3. The “mechanism” is a well-known toggle link mechanism TM. Adopted here. Here, with reference to FIG. 2 and FIG. 3, the torque link mechanism TM is configured such that the upper link 17 and the lower link 18 that are rotatably connected to each other by the spring pin 16 are both freely rotatable on the frame 12. The handle arm 13, the lever 19, and the latch 20 provided so as to be, a trip bar 21 that prevents the latch 20 from rotating counterclockwise, and a latch spring 22 that biases the trip bar 21 clockwise (see FIG. 1). ), Each member of a main spring 23 (indicated by a one-dot chain line in FIG. 3 for the sake of convenience) stretched between the spring pin 16 and the handle arm 13.

ハンドルアーム１３は、その両腕、すなわちＵ字型の側面の円弧状に形成された端部１３ａが、フレーム１２に設けられた円弧状凹部１２ａに、メインバネ２３の力によって押し付けられているとともに、その回動軌跡がフレーム板１２Ａ（１２Ｂ）の外面あるいは内面と略同一面となるよう、前述したように略Ｕ字型に形成されている。一方、レバー１９も、その両腕をフレーム板１２Ａ・１２Ｂの間で回動せしめるため、略Ｕ字型に形成されており、その回動は、Ｕ字型の底面に相当する部位とほぼ平行に外側に延設された第一の軸部１９ａが、フレーム１２に設けられた軸孔１２ｂに軸支されることで行なわれる。 The handle arm 13 has both arms, that is, end portions 13 a formed in an arc shape on the U-shaped side surface pressed against an arc-shaped concave portion 12 a provided in the frame 12 by the force of the main spring 23. As described above, the rotation trajectory is formed in a substantially U shape so that the rotation locus is substantially flush with the outer surface or the inner surface of the frame plate 12A (12B). On the other hand, the lever 19 is also formed in a substantially U-shape in order to rotate both arms between the frame plates 12A and 12B, and the rotation is substantially parallel to a portion corresponding to the bottom surface of the U-shape. The first shaft portion 19 a extending outward is supported by a shaft hole 12 b provided in the frame 12.

上リンク１７は、レバー１９の側面より突設された第二の軸部１９ｂに、第一の円弧状凹部１７ａが枢着されることで、フレーム１２とレバー１９の間に生じた隙間にて回動がなされるが、この隙間は、軸孔１２ｂが、いわゆるバーリング加工によって得られる突設部１２ｃ（図３（ｂ）及び図４、等を参照）の幅に相当している。なお、ＯＮ状態では、この突設部１２ｃに第二の円弧状凹部１７ｂがメインバネ２３の力によって押し付けられている。この上リンク１７は第三の円弧状凹部１７ｃも有し、この第三の円弧状凹部１７ｃと下リンク１８の第一の孔部１８ａが、それぞれスプリングピン１６に枢着、軸着されることで、これら上リンク１７と下リンク１８は、いわゆるトグルリンク機構の骨格として、前述した通り、スプリングピン１６を介して連結されており、さらに、第二の孔部１８ｂがクロスバー１１内に配設されたクロスバーピン２４に軸着されることで、下リンク１８とクロスバー１１が連結されている。なお、この実施の形態では、上リンク１７は、ハンドルアーム１３やレバー１９と同様、略Ｕ字型、下リンク１８は、フレーム１２と同様、相対向する一対の板状で、それぞれ形成されているが、言うまでもなく、この形状に限定されるものではない。 The upper link 17 has a gap formed between the frame 12 and the lever 19 by pivotally attaching the first arcuate recess 17a to the second shaft portion 19b protruding from the side surface of the lever 19. Although the rotation is performed, the gap corresponds to the width of the projecting portion 12c (see FIGS. 3B and 4, etc.) in which the shaft hole 12b is obtained by so-called burring. In the ON state, the second arcuate recess 17 b is pressed against the projecting portion 12 c by the force of the main spring 23. The upper link 17 also has a third arcuate recess 17c, and the third arcuate recess 17c and the first hole 18a of the lower link 18 are pivotally and pivotally attached to the spring pin 16, respectively. As described above, the upper link 17 and the lower link 18 are connected via the spring pin 16 as a skeleton of a so-called toggle link mechanism, and the second hole 18b is arranged in the cross bar 11. The lower link 18 and the crossbar 11 are connected by being pivotally attached to the provided crossbar pin 24. In this embodiment, the upper link 17 is substantially U-shaped like the handle arm 13 and the lever 19, and the lower link 18 is formed in a pair of opposing plates like the frame 12, respectively. Needless to say, it is not limited to this shape.

続いて、本発明の要部となるクロスバー１１の軸部について説明する。
フレーム１２の前記半円弧面１２ｄと前記ベースのＵ字状溝２ａとで支承面がほぼ真円状の実質的に円状の支持部を構成する。
クロスバー１１の非真円状回動軸（被支承部）１１ｓのその回動中心方向（図３（ａ）（ｂ）及び図６（ａ）（ｂ）において紙面に垂直な方向）に見た形状は、その一例として図６（ａ）（ｂ）に例示してあるように、真円柱状軸の外周の一部を切除した非真円形状とし、切除されていない部分（第１の円弧部１１ａ）の円周の前記切除部に隣接した二つの隣接部の一方（下リンク１８から遠い側）に、クロスバー第二軸心１１ｃを中心とする第２の円弧部１１ｄを形成してある。
この第２の円弧部１１ｄは、前記クロスバー第一軸心１１ｂを中心とする前記第１の円弧部１１ａより、曲率半径を小さく形成してある。
なお、クロスバー１１とその回動軸（被支承部）１１ｓとは、回動軸１１ｓの周方向に相対的に回動しないように堅固に結合されている。Then, the axial part of the cross bar 11 used as the principal part of this invention is demonstrated.
The semicircular arc surface 12d of the frame 12 and the U-shaped groove 2a of the base constitute a substantially circular support portion having a substantially circular support surface.
As seen in the direction of the center of rotation of the non-circular rotation shaft (supported portion) 11s of the cross bar 11 (the direction perpendicular to the paper surface in FIGS. 3A, 3B and 6A, 6B). As shown in FIGS. 6 (a) and 6 (b) as an example, the shape is a non-circular shape in which a part of the outer periphery of the true cylindrical shaft is cut away, and the part that is not cut out (the first part) A second arc portion 11d centering on the crossbar second axis 11c is formed on one of the two adjacent portions (the side far from the lower link 18) adjacent to the cut portion on the circumference of the arc portion 11a). It is.
The second arc portion 11d is formed to have a smaller radius of curvature than the first arc portion 11a centered on the crossbar first axis 11b.
The cross bar 11 and its rotating shaft (supported portion) 11s are firmly coupled so as not to rotate relatively in the circumferential direction of the rotating shaft 11s.

図３（ａ）及び図６（ａ）に示すように、ＯＮ→ＯＦＦ時（接点７，９が相互に閉の状態から、接点７，９が相互に開の状態への状変時）にはメインバネ２３によってスプリングピン１６及び下リンク１８を介しクロスバーピン２４に上方向（矢印upの方向）に力１８ｃが作用し、クロスバーピン２４を作用点としてクロスバー１１は上方向に吊り上げられる。この際、図４、図６（ａ）に示すようにフレーム１２の半円弧面１２ｄにクロスバー１１の非真円状回動軸（被支承部）１１ｓの第１の円弧部１１ａ（第２の円弧部１１ｄより曲率半径が大きい）が図示左上の位置１１ｅ１で当接するため、クロスバー１１は、クロスバー第一軸心１１ｂを中心として反時計回りに回動し、このクロスバー１１の回動に伴い可動接触子１０も回動して開路に至る。このとき、図６（ａ）に示されているように、スプリングピン１６の中心とクロスバーピン２４の中心とを結ぶ直線に対するクロスバー第一軸心１１ｂの垂直方向距離はＬ３となる。 As shown in FIGS. 3 (a) and 6 (a), when ON → OFF (when the contacts 7, 9 are closed to each other and the contacts 7, 9 are opened to each other). The main spring 23 applies a force 18c upward (in the direction of the arrow up) to the crossbar pin 24 via the spring pin 16 and the lower link 18, and the crossbar 11 is lifted upward with the crossbar pin 24 as an action point. . At this time, as shown in FIGS. 4 and 6A, the first arc portion 11a (second portion) of the non-circular rotation shaft (supported portion) 11s of the crossbar 11 is formed on the semicircular arc surface 12d of the frame 12. Is larger than the circular arc portion 11d), the crossbar 11 rotates counterclockwise about the first crossbar center axis 11b, and the crossbar 11 rotates. With the movement, the movable contact 10 also rotates to reach the open circuit. At this time, as shown in FIG. 6A, the vertical distance of the crossbar first axis 11b with respect to the straight line connecting the center of the spring pin 16 and the center of the crossbar pin 24 is L3.

一方、ＯＦＦ→ＯＮ時（接点７，９が相互に開の状態から、接点７，９が相互に閉の状態への状変時）には、図３（ｂ）及び図６（ｂ）に示すとおり、メインバネ２３によって、上リンク１７の第二の円弧状凹部１７ｂがフレーム１２の突設部１２ｃに押し付けられ、スプリングピン１６及び下リンク１８を介しクロスバーピン２４に下方向（矢印ｄｎの方向）に力１８ｃが作用し、クロスバーピン２４を作用点として、クロスバー１１を下方向に押し込んでいる。このとき、図６（ｂ）に示すようにベース２に形成されたＵ溝（支持部）２ａに対し、前記クロスバー第二軸心１１ｃを中心とする前記第２の円弧部１１ｄ（第１の円弧部１１ａより曲率半径が小さい）が図示左下の位置１１ｅ２で当接し軸支され、クロスバー１１に前記クロスバー第二軸心１１ｃを中心とする回転モーメント５１ａが生じる。この回転モーメント５１ａは、前記力１８ｃの大きさと、距離Ｌ１（スプリングピン１６の中心とクロスバーピン２４の中心とを結ぶ直線に対するクロスバー第二軸心１１ｃの垂直方向距離）との積になる。 On the other hand, in the case of OFF → ON (when the contacts 7 and 9 are changed from the open state to the closed state of the contacts 7 and 9), the state shown in FIGS. 3B and 6B is obtained. As shown, the second arc-shaped concave portion 17b of the upper link 17 is pressed against the projecting portion 12c of the frame 12 by the main spring 23, and moves downward (indicated by the arrow dn) to the crossbar pin 24 via the spring pin 16 and the lower link 18. Force 18c acts in the direction), and the crossbar 11 is pushed downward with the crossbar pin 24 as the point of action. At this time, as shown in FIG. 6B, with respect to the U groove (supporting portion) 2a formed in the base 2, the second arc portion 11d (first portion) centering on the second crossbar second axis 11c. Is smaller than the arcuate portion 11a) and is pivotally supported at a lower left position 11e2 in the figure, and a rotational moment 51a about the crossbar second axis 11c is generated in the crossbar 11. This rotational moment 51a is the product of the magnitude of the force 18c and the distance L1 (the vertical distance of the crossbar second axis 11c with respect to the straight line connecting the center of the spring pin 16 and the center of the crossbar pin 24). .

クロスバー回動軸１１ｓと支持部２ａ，１２ｄとの、クロスバー回動軸１１ｓの軸心の延在方向に見た断面形状の相違（本実施の形態１ではクロスバー回動軸１１ｓの当該断面形状は前述のような非真円形状、支持部２ａ，１２ｄは実質的に真円形状）に依存して、回路遮断器開放状態（図６（ａ）の状態）から回路遮断器投入状態（図６（ｂ）の状態）への投入過程では、開閉機構部５１の投入力によってクロスバー回動軸１１ｓの軸心は、第一軸心１１ｂから第二軸心１１ｃへと自動的に移動し、逆に、回路遮断器投入状態（図６（ｂ）の状態）から回路遮断器開放状態（図６（ａ）の状態）への開放過程では、開閉機構部５１の開放力によってクロスバー回動軸１１ｓの軸心は、第二軸心１１ｃから第一軸心１１ｂへと自動的に移動する。 Difference in cross-sectional shape of the crossbar rotating shaft 11s and the support portions 2a and 12d as viewed in the extending direction of the axis of the crossbar rotating shaft 11s (in the first embodiment, the crossbar rotating shaft 11s The cross-sectional shape depends on the non-circular shape as described above, and the support portions 2a and 12d are substantially perfect circle shapes), and the circuit breaker is turned on from the circuit breaker open state (the state of FIG. 6A). In the insertion process to the state shown in FIG. 6B, the axis of the crossbar rotating shaft 11s is automatically moved from the first axis 11b to the second axis 11c by the input / output of the opening / closing mechanism 51. On the contrary, in the opening process from the circuit breaker on state (state of FIG. 6B) to the circuit breaker open state (state of FIG. 6A), the opening force of the opening / closing mechanism 51 crosses The axis of the bar rotation shaft 11s automatically moves from the second axis 11c to the first axis 11b. .

なお、本実施の形態１の回路遮断器におけるクロスバー回動軸１１ｓの前記第２の円弧部１１ｄの曲率半径は、従来の回路遮断器におけるクロスバー１１１の断面が真円形状の回動軸の曲率半径より小さく設定され、本実施の形態１の回路遮断器におけるクロスバー回動軸１１ｓの前記第１の円弧部１１ａの曲率半径は、従来の回路遮断器におけるクロスバー１１１の曲率半径と同じに設定されている。
本実施の形態１の回路遮断器におけるクロスバー回動軸１１ｓの前記クロスバー第一軸心１１ｂと従来の回路遮断器におけるクロスバー１１１の断面が真円形状の回動軸の軸心１１１ａとは同じ位置である。The radius of curvature of the second arc portion 11d of the crossbar rotating shaft 11s in the circuit breaker of the first embodiment is a rotating shaft in which the cross section of the crossbar 111 in the conventional circuit breaker is a perfect circle. The curvature radius of the first arc portion 11a of the crossbar rotating shaft 11s in the circuit breaker of the first embodiment is set to be smaller than the curvature radius of the crossbar 111 in the conventional circuit breaker. Are set the same.
The crossbar first axis 11b of the crossbar rotation shaft 11s in the circuit breaker of the first embodiment and the rotation shaft axis 111a of the crossbar 111 in the conventional circuit breaker having a perfect circular shape, Are in the same position.

図３（ｂ）、図６（ｂ）に示すように、クロスバー第二軸心１１ｃと、下リンク１８によるクロスバー１１を押し込む作用点であるクロスバーピン２４の中心までの距離はＬ１となる。
一方、図７、図８に示すように、従来の回路遮断器のクロスバー１１１の仮想回動軸の軸中心１１１ａと、下リンク１８によるクロスバー１１１を押し込む作用点であるクロスバーピン２４の中心までの距離はＬ２となる。As shown in FIGS. 3B and 6B, the distance from the crossbar second axis 11c to the center of the crossbar pin 24, which is the point of action for pushing the crossbar 11 by the lower link 18, is L1. Become.
On the other hand, as shown in FIGS. 7 and 8, the axis center 111 a of the virtual rotation axis of the crossbar 111 of the conventional circuit breaker and the crossbar pin 24, which is an action point for pushing the crossbar 111 by the lower link 18, The distance to the center is L2.

クロスバー第二軸中心１１ｃを形成する第２の円弧部１１ｄの曲率半径は、従来の円形断面のクロスバー１１１の曲率半径より小さく設定されているので、クロスバーの仮想回動軸の軸中心から下リンク１８による押し込む作用点であるクロスバーピン２４の中心までの距離を、従来のものと本実施の形態とで比較すると、Ｌ１＞Ｌ２となり、その結果、同じ押し込み力でも本実施の形態における前記クロスバー１１の回転モーメント５１ａの方が従来品の前記クロスバー１１の回転モーメント５１ｃに比べて大きくなる。 Since the radius of curvature of the second arc portion 11d forming the crossbar second axis center 11c is set smaller than the radius of curvature of the crossbar 111 having the conventional circular cross section, the axis center of the virtual rotation axis of the crossbar When the distance from the center to the center of the cross bar pin 24 that is the action point of pushing by the lower link 18 is compared with that of the present embodiment, L1> L2, and as a result, the present embodiment even with the same pushing force. The rotational moment 51a of the cross bar 11 in FIG. 2 is larger than the rotational moment 51c of the conventional cross bar 11.

また、本実施の形態によれば、下リンク１８の押し込み力線１１ｃに対して、クロスバー１１の最大径及び支持部２ａ，１２ｄの最大径を大きくすることなくクロスバー１１の支持位置１１ｅを従来品に比べて遠ざけることができ、省スペースにて投入力のモーメントを増大させることができる。換言すれば、機構部のスペースと可動接触子の回転角（遮断性能）を変えることなく、投入力を増大させることができる。 In addition, according to the present embodiment, the support position 11e of the crossbar 11 can be set to the pushing force line 11c of the lower link 18 without increasing the maximum diameter of the crossbar 11 and the maximum diameters of the support portions 2a and 12d. Compared to conventional products, the distance can be increased, and the moment of input / output can be increased in a space-saving manner. In other words, the throwing force can be increased without changing the space of the mechanism portion and the rotation angle (cutoff performance) of the movable contact.

実施の形態２．
図７はこの発明の実施の形態２における回路遮断器の一例を示すものであり、前述の実施の形態１とは逆に、クロスバー回動軸１１ｓの当該断面形状は真円形状、支持部２ａ，１２ｄは略楕円形状あるいは長孔形状等の実質的に非真円形状としたものであり、この場合も、前述の実施の形態１の場合と同様に、クロスバー回動軸１１ｓと支持部２ａ，１２ｄとの、クロスバー回動軸１１ｓの軸心の延在方向に見た断面形状の相違に依存して、回路遮断器投入過程では、開閉機構部５１の投入力によってクロスバー回動軸１１ｓの軸心は、第一軸心１１ｂ２から第二軸心１１ｃ２へと自動的に移動し、逆に、回路遮断器開放過程では、開閉機構部５１の開放力によってクロスバー回動軸１１ｓの軸心は、第二軸心１１ｃ２から第一軸心１１ｂ２へと自動的に移動する。Embodiment 2. FIG.
FIG. 7 shows an example of a circuit breaker according to Embodiment 2 of the present invention. Contrary to Embodiment 1 described above, the cross-sectional shape of the crossbar rotating shaft 11s is a perfect circle, and the support portion. 2a and 12d are substantially non-circular shapes such as a substantially elliptical shape or a long hole shape, and in this case as well as the case of the first embodiment, the crossbar rotating shaft 11s and the support are supported. Depending on the difference in cross-sectional shape seen in the direction in which the axis of the crossbar rotating shaft 11s extends with respect to the parts 2a and 12d, in the circuit breaker charging process, the crossbar rotation is performed by the input / output of the switching mechanism 51. The shaft center of the moving shaft 11s automatically moves from the first shaft center 11b2 to the second shaft center 11c2, and conversely, in the circuit breaker opening process, the opening force of the opening / closing mechanism 51 causes the crossbar rotation shaft. The axis of 11s is changed from the second axis 11c2 to the first axis 11b2. Automatically moves.

従って、本実施の形態２の場合も、前述の実施の形態１の場合と同様に、前記クロスバー第二軸心１１ｃを中心とする回転モーメント５１ｂが生じ、従来のものと本実施の形態２とで比較すると、Ｌ１２＞Ｌ２となり、その結果同じ押し込み力でも本実施の形態２の方が従来品に比べ、前記回転モーメントが大きくなり、機構部のスペースと可動接触子の回転角（遮断性能）を変えることなく、投入力を増大させることができる。
換言すれば、下リンク１８の押し込み力線１１ｃに対して、クロスバー１１の最大径及び支持部２ａ，１２ｄの最大径を大きくすることなくクロスバー１１の支持位置１１ｅを従来品に比べて遠ざけることができ、省スペースにて投入力のモーメントを増大させることができる。Accordingly, also in the case of the second embodiment, as in the case of the first embodiment described above, the rotational moment 51b centered on the second crossbar second axis 11c is generated, and the conventional one and the second embodiment. In comparison, L12> L2, and as a result, even with the same pushing force, the rotational moment of the second embodiment is larger than that of the conventional product, and the space of the mechanism portion and the rotational angle of the movable contact (blocking performance) ) Can be increased without changing.
In other words, the support position 11e of the cross bar 11 is moved away from the pushing force line 11c of the lower link 18 without increasing the maximum diameter of the cross bar 11 and the maximum diameters of the support portions 2a and 12d as compared with the conventional product. It is possible to increase the moment of input and output in a space-saving manner.

なお、本実施の形態２についての前記説明は、前述の実施の形態１と異なる点を主に説明してあり、前記説明以外については前述の実施の形態と同じであるので説明を割愛してある。 Note that the description of the second embodiment has mainly described differences from the first embodiment described above, and the description other than the above description is the same as the first embodiment, so that the description is omitted. is there.

なお、前述の説明および前述の各図からも明白なように、本発明の実施の形態には、次のような技術的特徴がある。
回路遮断器筐体１０１ｃ内に開閉機構部５１とこの開閉機構部５１に連結され前記開閉機構部５１の動作により回動する保持部材１１とこの保持部材１１に保持された可動接触子１０と前記保持部材１１の回動に伴って回動する可動接触子１０が開閉する固定接触子８とを内蔵している回路遮断器において、図６（ａ）（ｂ）に例示のように前記保持部材１１を回動可能に支持する支持部２ａ，１２ｄの支承面（図６（ａ）（ｂ）の点線）の前記保持部材１１の回動の回動中心方向（図６において紙面に鉛直の方向）に見た形状（実質的に真円状）と、前記支持部２ａ，１２ｄの支承面（図６（ａ）（ｂ）の点線）によって支承される前記保持部材１１の被支承面（クロスバー（保持部材）の回動軸１１ｓの外周面）の前記回動中心方向に見た形状（ほぼ楕円状）とが図６（ａ）（ｂ）に例示のように異なる形状（図６（ａ）（ｂ）の事例では前者はほぼ真円状、後者はほぼ楕円状）に形成され、前記開の状態における前記保持部材１１の第一軸心１１ｂの位置と前記可動接触子１０の閉の状態における前記保持部材１１の第二軸心１１ｃの位置とが異なる位置となる回路遮断器でもある。As is apparent from the above description and the respective drawings, the embodiment of the present invention has the following technical features.
An opening / closing mechanism 51 in the circuit breaker housing 101c, a holding member 11 connected to the opening / closing mechanism 51 and rotated by the operation of the opening / closing mechanism 51, the movable contact 10 held by the holding member 11, and the In the circuit breaker incorporating the fixed contact 8 that opens and closes the movable contact 10 that rotates as the holding member 11 rotates, the holding member as shown in FIGS. 6 (a) and 6 (b). Rotation center direction of the holding member 11 of the support surfaces (dotted lines in FIGS. 6A and 6B) of the support portions 2a and 12d that rotatably support the rotation direction 11 (direction perpendicular to the paper surface in FIG. 6) ) And a supported surface (cross) of the holding member 11 supported by the supporting surfaces of the supporting portions 2a and 12d (dotted lines in FIGS. 6A and 6B). The bar (holding member) is viewed in the direction of the rotation center of the rotation shaft 11s. As shown in FIGS. 6A and 6B, the shape (substantially oval) is different from the shape (in the case of FIGS. 6A and 6B, the former is almost a circle and the latter is almost oval). The circuit is cut off so that the position of the first axis 11b of the holding member 11 in the opened state and the position of the second axis 11c of the holding member 11 in the closed state of the movable contactor 10 are different. It is also a vessel.

また、回路遮断器筐体１０１ｃ内に開閉機構部５１とこの開閉機構部５１に連結され前記開閉機構部５１の動作により回動する保持部材１１とこの保持部材１１に保持された可動接触子１０と前記保持部材１１の回動に伴って回動する可動接触子１０が開閉する固定接触子８とを内蔵している回路遮断器において、図６（ａ）（ｂ）に例示のように前記保持部材１１を回動可能に支持する支持部２ａ，１２ｄの支承面（図６（ａ）（ｂ）の点線）とこの支承面によって支承される前記保持部材１１の被支承面（クロスバー（保持部材）の回動軸１１ｓの外周面）との間の円環状の間隙のその周方向の一部11G12がその周方向の残りの部分に比べて径方向の間隙長L11G12を長く形成された構造であり、この構造により、前記可動接触子１０の開の状態における前記保持部材１１の第一軸心１１ｂの位置と前記可動接触子１０の閉の状態における前記保持部材１１の第二軸心１１ｃの位置とが図６（ａ）（ｂ）に例示のように異なる位置となる回路遮断器でもある。 In addition, the circuit breaker casing 101 c is provided with an opening / closing mechanism 51, a holding member 11 connected to the opening / closing mechanism 51 and rotated by the operation of the opening / closing mechanism 51, and the movable contact 10 held by the holding member 11. And a fixed contact 8 that opens and closes the movable contact 10 that rotates as the holding member 11 rotates, as illustrated in FIGS. 6 (a) and 6 (b). The supporting surfaces of the support portions 2a and 12d that support the holding member 11 so as to be rotatable (dotted lines in FIGS. 6A and 6B) and the supported surface of the holding member 11 supported by the supporting surface (crossbar ( The circumferential portion 11G12 of the annular gap between the holding member) and the outer peripheral surface of the rotating shaft 11s is formed to have a longer radial gap length L11G12 than the remaining portion in the circumferential direction. This structure allows the movable contact 10 to be opened. 6A and 6B show the position of the first axis 11b of the holding member 11 and the position of the second axis 11c of the holding member 11 when the movable contactor 10 is closed. It is also a circuit breaker at a different position.

また、前記支承面（図６（ａ）（ｂ）の点線）を有する前記支持部２ａ，１２ｄが前記筐体１０１ｃ側に設けられ前記被支承面（クロスバー（保持部材）の回動軸１１ｓの外周面）が前記保持部材１１の回動軸１１ｓに形成されている回路遮断器でもある。 Further, the support portions 2a and 12d having the bearing surface (dotted lines in FIGS. 6A and 6B) are provided on the housing 101c side, and the pivot shaft 11s of the supported surface (crossbar (holding member)). Is also a circuit breaker formed on the rotating shaft 11s of the holding member 11.

また、前記第二軸心１１ｃの位置が前記第一軸心１１ｂの位置より前記固定接触子８から遠い位置にある回路遮断器でもある。
また、前記保持部材１１の開閉機構部５１との連結点（クロスバーピン２４）が、前記可動接触子１０の接点９と前記支持部２ａ，１２ｄとの間に位置している回路遮断器でもある。Moreover, it is also a circuit breaker in which the position of the second axis 11c is farther from the fixed contact 8 than the position of the first axis 11b.
Also, a circuit breaker in which the connection point (crossbar pin 24) of the holding member 11 with the opening / closing mechanism 51 is located between the contact 9 of the movable contact 10 and the support portions 2a and 12d. is there.

また、前記保持部材１１を回動可能に支持する支持部２ａ，１２ｄの支承面（図６（ａ），（ｂ）の点線）の、前記保持部材１１の回動の回動中心方向（図６において紙面に鉛直の方向）に見た形状がほぼ真円状であり、前記保持部材１１の被支承面（クロスバー（保持部材）の回動軸１１ｓの外周面）の、前記回動中心方向に見た形状がほぼ楕円形状である回路遮断器でもある。 Moreover, the rotation center direction (FIG. 6) of the rotation of the holding member 11 on the support surfaces (dotted lines in FIGS. 6A and 6B) of the support portions 2a and 12d that rotatably support the holding member 11 is illustrated. 6, the shape viewed in the direction perpendicular to the paper surface is substantially circular, and the rotation center of the supported surface of the holding member 11 (the outer peripheral surface of the rotation shaft 11 s of the crossbar (holding member)). It is also a circuit breaker having a substantially elliptical shape when viewed in the direction.

また、逆に、前記保持部材１１を回動可能に支持する支持部２ａ，１２ｄの支承面（図６（ａ），（ｂ）の点線）の、前記保持部材１１の回動の回動中心方向（図６において紙面に鉛直の方向）に見た形状がほぼ楕円形状であり、前記保持部材の被支承面の、前記回動中心方向に見た形状が円形状である回路遮断器でもある。 On the other hand, the rotation center of the rotation of the holding member 11 on the support surfaces (dotted lines in FIGS. 6A and 6B) of the support portions 2a and 12d that rotatably support the holding member 11 is used. A circuit breaker in which the shape viewed in the direction (perpendicular to the paper surface in FIG. 6) is substantially elliptical, and the supported surface of the holding member is circular in the shape viewed in the direction of the rotation center. .

また、可動接触子１０の開の状態から前記可動接触子１０の閉の状態への投入動作に伴って前記保持部材１１の軸心が前記第一軸心１１ｂの位置から前記第二軸心１１ｃの位置へ前記開閉機構部５１の投入力によって移動することを特徴とする回路遮断器でもある。 Further, as the movable contact 10 is moved from the opened state to the closed state, the holding member 11 is moved from the position of the first axis 11b to the second axis 11c. It is also a circuit breaker that is moved to the position by the throwing input of the opening / closing mechanism 51.

また、可動接触子１０の閉の状態から前記可動接触子１０の開の状態への開放動作に伴って前記保持部材１１の軸心が前記第二軸心１１ｃの位置から前記第一軸心１１ｂの位置へ前記開閉機構部５１の開放力によって移動することを特徴とする回路遮断器でもある。 Further, as the movable contactor 10 is opened from the closed state to the open state of the movable contactor 10, the axis of the holding member 11 is moved from the position of the second axis 11c to the first axis 11b. It is also a circuit breaker that is moved to the position by the opening force of the opening / closing mechanism 51.

少なくとも一端に可動接点９を有する可動接触子１０と、前記可動接点９と接離する固定接点７を有する固定接触子８と、前記可動接触子１０を保持する保持部材１１と、この保持部材１１を駆動する下リンク１８と、過電流引き外し装置５３のラッチ２０に係合され該回路遮断器のトリップ時に回動するレバー１９と、このレバー１９に軸支され前記下リンク１８にスプリングピン１６を介して結合されて該下リンク１８とともにトグルリンクＴＭを構成する上リンク１７と、前記スプリングピン１６に従動側を結合されたメインバネ２３と、このメインバネ２３の駆動側と結合され、該回路遮断器の筐体１０１ｃに固定されたフレーム１２に回動自由に軸支された略Ｕ字型のハンドルアーム１３と、このハンドルアーム１３に固着され前記筐体１０１ｃより突出する取っ手部３ａを有するハンドル３とを備えた回路遮断器において、前記保持部材１１の回転軸１１ｓが真円でない回路遮断器でもある。 A movable contact 10 having a movable contact 9 at least at one end, a fixed contact 8 having a fixed contact 7 contacting and separating from the movable contact 9, a holding member 11 holding the movable contact 10, and the holding member 11 , A lever 19 that is engaged with the latch 20 of the overcurrent tripping device 53 and rotates when the circuit breaker trips, and a spring pin 16 that is pivotally supported by the lever 19 and attached to the lower link 18. Are coupled to the lower link 18 to form the toggle link TM, the main spring 23 coupled to the driven side of the spring pin 16, and the drive side of the main spring 23, thereby interrupting the circuit. A substantially U-shaped handle arm 13 pivotally supported by a frame 12 fixed to the housing 101c of the container, and a front arm fixed to the handle arm 13 In the circuit breaker and a handle 3 having a handle portion 3a projecting from the housing 101c, the rotation axis 11s of the holding member 11 is also a circuit breaker is not a perfect circle.

なお、本発明は、その発明の範囲内において、実施の形態を適宜、変形、省略することができる。
なお、各図中、同一符合は同一または相当部分を示す。In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.
In addition, in each figure, the same code | symbol shows the same or an equivalent part.

１カバー、１ａハンドル用窓孔、
２ベース、
２ａベース２に形成されたＵ溝（支持部）、
３ハンドル、３ａ取っ手部、
４電源側端子、５負荷側端子、
５カバー／ハンドル奥部、７固定接点、
８固定接触子、９可動接点、
１０可動接触子、１０ａ軸孔、
１１クロスバー（保持部材）、１１ａ第１の円弧部、
１１ｂ，１１ｂ２クロスバー（保持部材）第一軸心、
１１ｃ，１１ｃ２クロスバー（保持部材）第二軸心、
１１ｄ第２の円弧部、 11G12 円環状の間隙のその周方向の一部、
L11G12 間隙長、
１１ｓクロスバー（保持部材）の回動軸、
１１１従来のクロスバー、
１１１ａ従来のクロスバー１１１の仮想回動軸の軸中心、
１２フレーム、１２Ａフレーム板、
１２Ｂフレーム板、１２ａ円弧状凹部、
１２ｂ軸孔、１２ｃ突設部、
１２ｄ半円弧面（支持部）、１３ハンドルアーム、
１３ａハンドルアームの端部、１４摺動接触子、
１４ａ摺動接触子１４の軸支部、
１５接圧バネ、
１５ｃ中央部、１６スプリングピン、
１７上リンク、１７ａ第一の円弧状凹部、
１７ｂ第二の円弧状凹部、１７ｃ第三の円弧状凹部、
１８下リンク、１８ａ第一の孔部、
１８ｂ第二の孔部、１８ｃクロスバーピンに作用の力、
１９レバー、１９ａ第一の軸部、
１９ｂ第二の軸部、２０ラッチ、
２１トリップバー、２２ラッチバネ、
２３メインバネ、２４クロスバーピン、
５１開閉機構部、
５１ａ実施形態１のクロスバーの回転モーメント、
５１ｂ実施形態２のクロスバーの回転モーメント、
５１ｃ従来品のクロスバーの回転モーメント、
５２消弧ユニット、５３過電流引き外し装置、
１０１回路遮断器、１０１ｃ回路遮断器筐体、
ＴＭトグルリンク機構。1 Cover, 1a Window hole for handle,
2 base,
2a U groove (support part) formed in the base 2,
3 Handle, 3a Handle part,
4 Power supply side terminal 5 Load side terminal
5 Cover / handle inner part, 7 Fixed contact,
8 fixed contact, 9 movable contact,
10 movable contact, 10a shaft hole,
11 Crossbar (holding member), 11a 1st circular arc part,
11b, 11b2 Crossbar (holding member) first axis,
11c, 11c2 Crossbar (holding member) second axis,
11d second arc portion, 11G12 part of the circumferential direction of the annular gap,
L11G12 gap length,
11s Rotating shaft of crossbar (holding member),
111 conventional crossbar,
111a The axis center of the virtual rotation axis of the conventional crossbar 111,
12 frames, 12A frame board,
12B frame plate, 12a arc-shaped recess,
12b shaft hole, 12c projecting portion,
12d Semi-circular arc surface (support part), 13 Handle arm,
13a end of handle arm, 14 sliding contact,
14a A shaft support portion of the sliding contact 14,
15 Contact spring,
15c central part, 16 spring pin,
17 upper link, 17a first arcuate recess,
17b second arcuate recess, 17c third arcuate recess,
18 lower link, 18a first hole,
18b second hole, 18c force acting on the crossbar pin,
19 lever, 19a first shaft,
19b second shaft part, 20 latch,
21 Trip bar, 22 Latch spring,
23 main spring, 24 crossbar pin,
51 opening and closing mechanism,
51a Rotational moment of the crossbar of embodiment 1,
51b Rotational moment of the crossbar of embodiment 2,
51c Rotation moment of conventional crossbar,
52 arc extinguishing unit, 53 overcurrent tripping device,
101 circuit breaker, 101c circuit breaker housing,
TM Toggle link mechanism.

Claims

In the circuit breaker housing, an opening / closing mechanism, a holding member connected to the opening / closing mechanism and rotated by the operation of the opening / closing mechanism, a movable contact held by the holding member, and the rotation of the holding member In a circuit breaker having a built-in fixed contact that opens and closes a rotating movable contact, a rotation center direction of rotation of the holding member of a support surface of a support portion that rotatably supports the holding member And the shape seen in the rotational center direction of the supported surface of the holding member supported by the support surface of the support portion are formed in different shapes, and the movable contactor is in an open state. The position of the first axis that is the axis of the holding member is different from the position of the second axis that is the axis of the holding member in a closed state of the movable contact. Circuit breaker.

In the circuit breaker housing, an opening / closing mechanism, a holding member connected to the opening / closing mechanism and rotated by the operation of the opening / closing mechanism, a movable contact held by the holding member, and the rotation of the holding member In a circuit breaker having a built-in fixed contact that opens and closes a rotating movable contact, a support surface of a support portion that rotatably supports the holding member and a support member supported by the support surface. A part of the annular gap between the bearing surfaces in the circumferential direction is formed to have a longer radial gap length than the remaining part in the circumferential direction, and the holding in the opened state of the movable contact A circuit breaker characterized in that a position of a first axis that is an axis of a member is different from a position of a second axis that is an axis of the holding member in a closed state of the movable contact. .

The circuit breaker according to claim 1 or 2, wherein the support portion having the support surface is provided on the housing side, and the supported surface is formed on a rotation shaft of the holding member. A circuit breaker.

The circuit breaker according to claim 1 or 2, wherein the position of the second axis is farther from the fixed contact than the position of the first axis.

3. The circuit breaker according to claim 1, wherein a connection point of the holding member with the opening / closing mechanism is located between a contact of the movable contact and the support. A circuit breaker.

The circuit breaker according to any one of claims 1 to 5, wherein the support surface of the support portion that rotatably supports the holding member is viewed in a rotation center direction of the rotation of the holding member. A circuit breaker characterized in that the shape is substantially circular and the shape of the supported surface of the holding member as viewed in the direction of the rotation center is substantially elliptical.

The circuit breaker according to any one of claims 1 to 5, wherein the support surface of the support portion that rotatably supports the holding member is viewed in a rotation center direction of the rotation of the holding member. A circuit breaker characterized in that the shape is substantially elliptical, and the shape of the supported surface of the holding member viewed in the direction of the rotation center is circular.

The circuit breaker according to any one of claims 1 to 7, wherein the axis of the holding member is moved in accordance with a closing operation from an open state of the movable contact to a closed state of the movable contact. The circuit breaker which moves from the position of the first axis to the position of the second axis by the input / output of the opening / closing mechanism.

The circuit breaker according to any one of claims 1 to 7, wherein the axis of the holding member is moved along with the opening operation from the closed state of the movable contactor to the open state of the movable contactor. A circuit breaker which moves from the position of the second axis to the position of the first axis by the opening force of the opening / closing mechanism.