JP6928389B2

JP6928389B2 - Circuit breaker

Info

Publication number: JP6928389B2
Application number: JP2019053288A
Authority: JP
Inventors: 馬場　隆; 隆馬場; 誠今川; 亮平塩谷
Original assignee: Tempearl Industrial Co Ltd
Current assignee: Tempearl Industrial Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2021-09-01
Anticipated expiration: 2039-03-20
Also published as: JP7249688B2; JP2021170556A; JP2020155332A

Description

本発明は、電源側と負荷側とを接続する回路に過大電流が流れた際に回路を遮断して負荷側の機器等を保護するための回路遮断器に関する。 The present invention relates to a circuit breaker for protecting a device or the like on the load side by interrupting the circuit when an excessive current flows through the circuit connecting the power supply side and the load side.

上記の回路遮断器には、例えば、図１４に示すように、電源側の端子と負荷側の端子とにつながる電路と、該電路を開閉する一対の接点９０、９１と、前記電路に流れる電流によって磁力を発生させる磁性板（以下、固定側磁性板と称する）９２と、前記固定側磁性板９２との間にスペースをあけて対向配置され、且つ前記磁力を受けて前記固定側磁性板９２に接近する磁性板（以下、可動側磁性板と称する）９３とを備えているものが知られている。（例えば特許文献１参照） In the circuit breaker, for example, as shown in FIG. 14, an electric circuit connected to a terminal on the power supply side and a terminal on the load side, a pair of contacts 90 and 91 for opening and closing the electric circuit, and a current flowing through the electric circuit. The fixed-side magnetic plate 92 is arranged so as to face each other with a space between the magnetic plate (hereinafter referred to as the fixed-side magnetic plate) 92 that generates a magnetic force by the magnetic force, and receives the magnetic force. It is known that the one provided with a magnetic plate (hereinafter, referred to as a movable side magnetic plate) 93 approaching the above. (See, for example, Patent Document 1)

前記可動側磁性板９３は、常態においては接点９０、９１が接触している状態を保持しているが、電路に短絡電流のような過大電流が流れると固定側磁性板９２から発生した大きな磁力によって該固定側磁性板９２に接近し、これにより、図１５に示すように、前記保持を解除するように構成されている。 The movable side magnetic plate 93 keeps the contacts 90 and 91 in contact with each other in a normal state, but when an excessive current such as a short circuit current flows through the electric circuit, a large magnetic force generated from the fixed side magnetic plate 92 is generated. It is configured to approach the fixed side magnetic plate 92 by means of, thereby releasing the holding, as shown in FIG.

これにより、前記回路遮断器９は、電路に過大電流が流れたときに電路を遮断できるようになっている。 As a result, the circuit breaker 9 can cut off the electric circuit when an excessive current flows through the electric circuit.

特開２００４−２３４９１４号公報Japanese Unexamined Patent Publication No. 2004-234914

ところで、上記従来の回路遮断器９では、固定側磁性板９２と可動側磁性板９３との間にスペースが形成されている分、固定側磁性板９２で発生させた磁力が可動側磁性板９３に伝わりにくくなる。これに伴い、上記従来の回路遮断器９では、可動側磁性板９３の前記保持を解除する動作が遅くなる結果、電路に過大電流が流れてから電路を遮断するまでに時間がかかることが問題となっていた。 By the way, in the conventional circuit breaker 9, the magnetic force generated by the fixed side magnetic plate 92 is generated by the movable side magnetic plate 93 because a space is formed between the fixed side magnetic plate 92 and the movable side magnetic plate 93. It becomes difficult to convey to. Along with this, in the conventional circuit breaker 9, the operation of releasing the holding of the movable side magnetic plate 93 is delayed, and as a result, it takes a long time to cut off the electric circuit after an excessive current flows through the electric circuit. It was.

そこで、本発明は、かかる実情に鑑み、電路に過大電流が流れた際に電路を素早く遮断できる回路遮断器を提供することを課題とする。 Therefore, in view of such circumstances, it is an object of the present invention to provide a circuit breaker capable of quickly interrupting an electric circuit when an excessive current flows through the electric circuit.

本発明の回路遮断器は、
ケースと、
電源側の端子と負荷側の端子とに繋がる電路と、
該電路を開閉する接点部と、
前記電路に流れる電流により電磁石となる吸引体と、
前記接点部の閉状態を保持可能であり且つ前記吸引体に隙間をあけて対向配置される保持状態と、前記吸引体側に回動することによって前記接点部の閉状態に対する保持を解除して前記接点部を開放可能とする解除状態とに切り替わる切替動作をとるように構成される可動体とを備え、
前記可動体は、前記回動の起点となる軸部を有し、
前記ケースは、前記軸部を受ける軸受部を有し、
該軸受部は、前記可動体が前記保持状態である場合に、前記軸部の前記吸引体側へのス
ライドのための動き代となるスペースが設定されるように構成される。 The circuit breaker of the present invention
With the case
The electric circuit that connects the terminal on the power supply side and the terminal on the load side,
A contact part that opens and closes the electric path,
An attractive body that becomes an electromagnet by the current flowing in the electric circuit,
The closed state of the contact portion can be held and the holding state is arranged so as to face the suction body with a gap, and the holding state of the contact portion with respect to the closed state is released by rotating toward the suction body side. It is equipped with a movable body that is configured to take a switching operation that switches to the release state that allows the contact part to be opened.
The movable body has a shaft portion that serves as a starting point of the rotation.
The case has a bearing portion that receives the shaft portion and has a bearing portion.
Shaft receiving portion, when the movable member is in the holding state, configured to space the movement allowance for sliding into the suction side of the shaft portion is set.

上記構成の回路遮断器によれば、可動体が保持状態である場合、軸部には前記スライドのための動き代が設定されるため、可動体が吸引体の磁力（吸引力）を受けると軸部が吸引体側に移動しこれに伴い、可動体と吸引体との間のスペースが狭まる。 According to the circuit breaker having the above configuration, when the movable body is in the holding state, the movement allowance for the slide is set on the shaft portion, so that when the movable body receives the magnetic force (attracting force) of the attracting body. The shaft portion moves to the suction body side, and the space between the movable body and the suction body is narrowed accordingly.

これにより、吸引体と可動体の間の磁気抵抗が小さくなるため、吸引体の磁力が可動体に伝わり易くなる。従って、可動体が吸引体側に回動する速度（可動体の動作速度）が速くなり、電路に過大電流（すなわち、吸引体に可動体を引き寄せる強さの磁力を生じさせる電流）が流れた際に電路が素早く遮断される。 As a result, the magnetic resistance between the attractive body and the movable body is reduced, so that the magnetic force of the attractive body is easily transmitted to the movable body. Therefore, when the speed at which the movable body rotates toward the suction body (the operating speed of the movable body) becomes high and an excessive current (that is, a current that generates a magnetic force strong enough to attract the movable body to the suction body) flows through the electric circuit. The electric circuit is cut off quickly.

本発明の回路遮断器は、
前記可動体が少なくとも前記保持状態に切り替わっている状態で、前記可動体を前記動き代の範囲内で前記スライドを許容するようにして前記吸引体から離間する方向に向けて付勢する付勢手段を備えていてもよい。 The circuit breaker of the present invention
An urging means for urging the movable body in a direction away from the suction body so as to allow the slide within the range of the movement allowance while the movable body is at least switched to the holding state. May be provided.

上記構成の回路遮断器によれば、保持状態に切り替わっている可動体が付勢手段によって吸引体から離れる方向に付勢されるため、保持状態に切り替えられている可動体が電路に過大電流が流れる前に吸引体側に動いてしまうことを防止できる。従って、上記構成の回路遮断器は、意図しないタイミングで電路が遮断されてしまうことを防止できる。 According to the circuit breaker having the above configuration, the movable body switched to the holding state is urged in the direction away from the suction body by the urging means, so that the movable body switched to the holding state causes an excessive current in the electric circuit. It is possible to prevent the suction body from moving to the suction body side before flowing. Therefore, the circuit breaker having the above configuration can prevent the electric circuit from being interrupted at an unintended timing.

本発明の回路遮断器において、
前記可動体は、前記可動体が前記保持状態から前記解除状態への切替動作時の回動方向側に向けて配置される前面と、該回動方向とは反対側に向けて配置される後面と、を有し、
前記ケースは、前記後面を受ける後面用受部を有し、
前記可動体は、前記保持状態であり且つ前記付勢手段からの付勢力を受けた状態で、前記吸引体から離間する方向における前記動き代の一端に配置されるとともに前記後面が前記後面用受部に当接するように構成されていてもよい。 In the circuit breaker of the present invention
The movable body has a front surface in which the movable body is arranged toward the rotation direction side during the switching operation from the holding state to the release state, and a rear surface in which the movable body is arranged toward the side opposite to the rotation direction. And have
The case has a rear surface receiving portion that receives the rear surface.
The movable body is arranged at one end of the movement allowance in a direction away from the suction body while being in the holding state and receiving the urging force from the urging means, and the rear surface is the rear surface receiving receiver. It may be configured to come into contact with the portion.

上記構成の回路遮断器によれば、付勢手段によって吸引体から離間する方向に向けて付勢されている可動体が、動き代の前記一端に位置している状態で前記後面用受部に当接するため、保持状態に切り替えられている可動体を前記動き代の一端に留めておくことができる。 According to the circuit breaker having the above configuration, the movable body urged by the urging means in the direction away from the suction body is placed on the rear surface receiving portion in a state where it is located at one end of the movement allowance. Since it abuts, the movable body that has been switched to the holding state can be held at one end of the movement allowance.

従って、可動体が保持状態に切り替えられた状態で電路に過大電流が流れる前の状態においては、可動体と吸引体との間隔を一定の距離で保つことができ、これにより、可動体の切替動作の安定性を高めることができる。 Therefore, in the state where the movable body is switched to the holding state and before the excessive current flows in the electric circuit, the distance between the movable body and the suction body can be maintained at a constant distance, whereby the movable body can be switched. The stability of operation can be improved.

本発明の回路遮断器は、
前記接点部を開閉する開閉機構を備え、
前記接点部は、前記ケース内に固定される固定側端子と、該固定側端子に対して接離可能な状態で対向配置される可動側端子と、を有し、
前記開閉機構は、前記可動側端子を前記固定側端子に接触させるように移動操作可能であり、
前記可動体は、前記可動側端子を前記移動操作している状態の前記開閉機構を受けるための可動体側受部を有し、
前記ケースは、前記可動体側受部で前記開閉機構を受けている状態の前記可動体を受け止めるケース側受部を有するようにしてもよい。 The circuit breaker of the present invention
It is equipped with an opening / closing mechanism that opens / closes the contact portion.
The contact portion has a fixed side terminal fixed in the case and a movable side terminal arranged to face the fixed side terminal so as to be in contact with and detached from the fixed side terminal.
The opening / closing mechanism can be moved so as to bring the movable terminal into contact with the fixed terminal.
The movable body has a movable body side receiving portion for receiving the opening / closing mechanism in a state where the movable side terminal is being moved.
The case may have a case-side receiving portion that receives the movable body in a state where the movable body-side receiving portion receives the opening / closing mechanism.

上記構成の回路遮断器によれば、可動側端子を固定側端子に接触させている状態においては、可動体が可動体側受部によって開閉機構を受けた状態になる。このとき、可動体は、開閉機構からの外力が加わる一方、ケース側受部によって受け止められるため、可動体の配置位置のずれが防止される。 According to the circuit breaker having the above configuration, when the movable side terminal is in contact with the fixed side terminal, the movable body is in a state of receiving the opening / closing mechanism by the movable body side receiving portion. At this time, while the external force from the opening / closing mechanism is applied to the movable body, it is received by the case-side receiving portion, so that the displacement of the arrangement position of the movable body is prevented.

本発明の回路遮断器において、
前記吸引体は、前記可動体側に向けて配置される吸引側対向面を有し、
前記可動体は、前記吸引側対向面に対向配置される可動側対向面を有し、
前記可動側対向面は、前記可動体が前記保持状態であるときに、一端側が他端側よりも前記吸引側対向面に近くなるように傾斜し、
前記軸部は、前記一端、若しくは前記一端から前記他端側とは反対側にずれた位置の何れかに設けられていてもよい。 In the circuit breaker of the present invention
The suction body has a suction side facing surface that is arranged toward the movable body side.
The movable body has a movable side facing surface that is arranged to face the suction side facing surface.
The movable side facing surface is inclined so that one end side is closer to the suction side facing surface than the other end side when the movable body is in the holding state.
The shaft portion may be provided at either one end or a position shifted from the one end to the side opposite to the other end side.

上記構成の回路遮断器によれば、可動体が保持状態に切り替わっている場合、可動側対向面が軸部側であるほど吸引側対向面側に位置するように傾斜するため、吸引体と可動体との間のスペースは軸部側であるほど狭くなる。 According to the circuit breaker having the above configuration, when the movable body is switched to the holding state, the movable body is tilted so as to be located on the suction side facing surface side as the movable side facing surface is closer to the shaft portion, so that the movable body is movable with the suction body. The space between the body and the body becomes narrower toward the shaft.

そして、可動体が吸引体に生じた磁力を受けて軸部が吸引体側に動くと、前記スペースの軸部側がさらに狭まるため、可動体の回動時に前記磁力が該可動体に伝わり易くなり、可動体の動作速度が速くなる。 Then, when the movable body receives the magnetic force generated in the suction body and the shaft portion moves toward the suction body side, the shaft portion side of the space is further narrowed, so that the magnetic force is easily transmitted to the movable body when the movable body rotates. The operating speed of the movable body becomes faster.

以上のように、本発明の回路遮断器は、可動体の動作速度を速めることによって、電路に過大電流が流れた際に電路を素早く遮断できるという優れた効果を奏し得る。 As described above, the circuit breaker of the present invention can exert an excellent effect that the electric circuit can be quickly cut off when an excessive current flows through the electric circuit by increasing the operating speed of the movable body.

図１は、本発明の一実施形態に係る回路遮断器の斜視図である。FIG. 1 is a perspective view of a circuit breaker according to an embodiment of the present invention. 図２は、同実施形態に係る回路遮断器の分解図である。FIG. 2 is an exploded view of the circuit breaker according to the same embodiment. 図３は、同実施形態に係る回路遮断器の吸引体の説明図である。FIG. 3 is an explanatory view of a suction body of the circuit breaker according to the same embodiment. 図４は、同実施形態に係る回路遮断器の可動体の説明図である。FIG. 4 is an explanatory diagram of a movable body of the circuit breaker according to the same embodiment. 図５は、同実施形態に係る回路遮断器の内部の拡大図である。FIG. 5 is an enlarged view of the inside of the circuit breaker according to the embodiment. 図６は、図５のＶＩ−ＶＩ線における断面の拡大図である。FIG. 6 is an enlarged view of a cross section taken along the line VI-VI of FIG. 図７は、同実施形態に係る回路遮断器の軸部と軸受部の説明図である。FIG. 7 is an explanatory view of a shaft portion and a bearing portion of the circuit breaker according to the same embodiment. 図８は、同実施形態に係る回路遮断器の動作説明図であって、可動体が保持状態に切り替えられている状態の説明図である。FIG. 8 is an operation explanatory view of the circuit breaker according to the same embodiment, and is an explanatory view of a state in which the movable body is switched to the holding state. 図９は、図８の領域ＩＸの拡大図である。FIG. 9 is an enlarged view of the region IX of FIG. 図１０は、同実施形態に係る回路遮断器の動作説明図であって、可動体が吸引体側にスライドした状態の説明図である。FIG. 10 is an operation explanatory view of the circuit breaker according to the same embodiment, and is an explanatory view of a state in which the movable body is slid toward the suction body side. 図１１は、図１０の領域ＸＩの拡大図である。FIG. 11 is an enlarged view of the region XI of FIG. 図１２は、同実施形態に係る回路遮断器の動作説明図であって、可動体が吸引体側に回動した状態の説明図である。FIG. 12 is an operation explanatory view of the circuit breaker according to the same embodiment, and is an explanatory view of a state in which the movable body is rotated toward the suction body side. 図１３は、図１２の領域ＸＩＩＩの拡大図である。FIG. 13 is an enlarged view of region XIII of FIG. 図１４は、従来の回路遮断器の説明図であって、電路を遮断する前の状態の説明図である。FIG. 14 is an explanatory diagram of a conventional circuit breaker, and is an explanatory diagram of a state before the electric circuit is cut off. 図１５は、従来の回路遮断器の説明図であって、電路を遮断した後の状態の説明図である。FIG. 15 is an explanatory diagram of a conventional circuit breaker, and is an explanatory diagram of a state after the electric circuit is cut off.

以下、本発明の一実施形態に係る回路遮断器について添付図面を参照しつつ説明を行う。 Hereinafter, the circuit breaker according to the embodiment of the present invention will be described with reference to the accompanying drawings.

本実施形態に係る回路遮断器１は、図２に示すように、ケース２と、電源側の端子Ｔ１と負荷側の端子Ｔ２とに繋がる電路と、該電路を開閉する接点部３と、電路に流れる電流により電磁石となる吸引体４と、接点部３の閉状態を保持し且つ吸引体４に対向配置される保持状態と、吸引体４側に回動して該吸引体４に接触することにより、接点部３の閉状態に対する保持を解除することで接点部３を開放可能とする解除状態とに切り替わる切替動作をとるように構成される可動体５と、可動体５を直接的又は間接的に回動方向の後方側に向けて付勢する付勢手段６と、前記接点部３を開閉する開閉機構７と、高温になると可動体５を吸引体４側に向けて移動させるように変形するバイメタル８と、を備えている。 As shown in FIG. 2, the circuit breaker 1 according to the present embodiment includes a case 2, an electric circuit connected to a terminal T1 on the power supply side and a terminal T2 on the load side, a contact portion 3 for opening and closing the electric circuit, and an electric circuit. The attractive body 4 which becomes an electric magnet by the current flowing through the motor, the holding state where the contact portion 3 is held in the closed state and is arranged to face the attractive body 4, and the attractive body 4 is rotated toward the attractive body 4 and comes into contact with the attractive body 4. As a result, the movable body 5 configured to take a switching operation to switch to the released state in which the contact portion 3 can be opened by releasing the holding of the contact portion 3 in the closed state, and the movable body 5 directly or The urging means 6 that indirectly urges the rear side in the rotation direction, the opening / closing mechanism 7 that opens and closes the contact portion 3, and the movable body 5 are moved toward the suction body 4 side when the temperature becomes high. It is equipped with a bimetal 8 that transforms into.

ケース２は、図１に示すように、使用時において分電盤（より具体的には、分電盤への取り付け面）に対向配置される背面２０と、該背面２０とは反対側の正面２１と、横幅方向で並ぶ一対の横側面２２と、縦幅方向で並ぶ一対の縦側面２３とを有する。なお、本実施形態では、背面２０と正面２１とが並ぶ方向を高さ方向と称して以下の説明を行う。なお、ケース２の横側面２２は、分電盤に設置された状態において、別のケース２の横側面２２と対向配置される部分である。 As shown in FIG. 1, the case 2 has a back surface 20 which is arranged to face the distribution board (more specifically, a mounting surface to the distribution board) during use, and a front surface opposite to the back surface 20. It has 21, a pair of horizontal side surfaces 22 arranged in the horizontal width direction, and a pair of vertical side surfaces 23 arranged in the vertical width direction. In the present embodiment, the direction in which the back surface 20 and the front surface 21 are lined up is referred to as a height direction, and the following description will be given. The lateral side surface 22 of the case 2 is a portion that is arranged to face the lateral side surface 22 of another case 2 when it is installed on the distribution board.

図２に示すように、接点部３は、ケース２内での配置位置が固定されている固定側接点部３０と、該固定側接点部３０に対して接離可能な状態で対向配置される可動側接点部３１とを有する。 As shown in FIG. 2, the contact portion 3 is arranged so as to face the fixed side contact portion 30 whose arrangement position in the case 2 is fixed and the fixed side contact portion 30 in a state where it can be brought into contact with and separated from the fixed side contact portion 30. It has a movable side contact portion 31.

可動側接点部３１と固定側接点部３０とは前記高さ方向において対向配置されている。そのため、可動側接点部３１は、前記高さ方向において固定側接点部３０に接離するように構成されている。また、本実施形態では、可動側接点部３１が固定側接点部３０よりもケース２の正面２１側に配置されている。 The movable side contact portion 31 and the fixed side contact portion 30 are arranged to face each other in the height direction. Therefore, the movable side contact portion 31 is configured to be in contact with and separated from the fixed side contact portion 30 in the height direction. Further, in the present embodiment, the movable side contact portion 31 is arranged on the front surface 21 side of the case 2 with respect to the fixed side contact portion 30.

吸引体４は、電路に流れる電流の大きさに応じて磁力を発生させるように構成されている。本実施形態に係る吸引体４は、図３に示すように、互いに対向する一対の側壁部４０と、該一対の側壁部４０に連続する中間壁部４１とを有する。 The suction body 4 is configured to generate a magnetic force according to the magnitude of the current flowing through the electric circuit. As shown in FIG. 3, the suction body 4 according to the present embodiment has a pair of side wall portions 40 facing each other and an intermediate wall portion 41 continuous with the pair of side wall portions 40.

一対の側壁部４０には、該一対の側壁部４０が対向する方向において貫通する軸孔４００が形成されている。 The pair of side wall portions 40 are formed with shaft holes 400 through which the pair of side wall portions 40 penetrate in the opposite directions.

また、吸引体４は、一対の側壁部４０が前記横幅方向で並ぶようにしてケース２内に配置されており、且つ各側壁部４０の軸孔４００には、ケース２の横側面２２の内側から延出する支軸２２０が挿通されている。これにより、吸引体４は、ケース２内において、前記横幅方向に延びる支軸２２０を中心として回転可能となっている。 Further, the suction body 4 is arranged in the case 2 so that the pair of side wall portions 40 are arranged in the lateral width direction, and the shaft hole 400 of each side wall portion 40 is inside the lateral side surface 22 of the case 2. A support shaft 220 extending from is inserted. As a result, the suction body 4 can rotate around the support shaft 220 extending in the lateral width direction in the case 2.

なお、支軸２２０の先端側は、少なくとも前記縦幅方向における横幅が軸孔４００の孔径よりも小さくなっている。そのため、吸引体４は、軸孔４００を画定する縁部と支軸２２０との間に形成されるスペースの範囲内で前記縦幅方向にスライド可能である。 The tip side of the support shaft 220 has at least a horizontal width in the vertical width direction smaller than the hole diameter of the shaft hole 400. Therefore, the suction body 4 can slide in the vertical width direction within the range of the space formed between the edge portion defining the shaft hole 400 and the support shaft 220.

さらに、側壁部４０は、可動体５に対向配置される吸引側対向面４０１を有する。吸引側対向面４０１は、前記高さ方向に対して交差する方向に傾斜している。より具体的に説明すると、吸引側対向面４０１は、一端部側が他端部側よりも可動体５に近付くようにして傾斜している。なお、本実施形態では、吸引体４自体が前記高さ方向に対して傾いた姿勢でケース２内に配置されている。 Further, the side wall portion 40 has a suction side facing surface 401 which is arranged to face the movable body 5. The suction side facing surface 401 is inclined in a direction intersecting the height direction. More specifically, the suction side facing surface 401 is inclined so that the one end side is closer to the movable body 5 than the other end side. In the present embodiment, the suction body 4 itself is arranged in the case 2 in an inclined posture with respect to the height direction.

可動体５は、図４に示すように、吸引体４に対向配置する可動本体部５０と、回動起点となる軸部５１であって、可動本体部５０につながる軸部５１と、を有する。 As shown in FIG. 4, the movable body 5 has a movable main body portion 50 arranged to face the suction body 4, and a shaft portion 51 serving as a rotation starting point and connected to the movable main body portion 50. ..

可動本体部５０は、吸引側対向面４０１に対向配置される可動側対向面５００を有する。 The movable main body portion 50 has a movable side facing surface 500 which is arranged to face the suction side facing surface 401.

可動体５が前記保持状態である場合、吸引側対向面４０１は、前記高さ方向に沿って真っすぐに延びた姿勢になる。一方、吸引側対向面４０１は、上述のように前記高さ方向に対して交差する方向に傾斜しているため、可動体５が前記保持状態である場合は、吸引側対向面４０１が可動側対向面５００に対して傾いた姿勢となっている。 When the movable body 5 is in the holding state, the suction side facing surface 401 is in a posture extending straight along the height direction. On the other hand, since the suction side facing surface 401 is inclined in the direction intersecting the height direction as described above, when the movable body 5 is in the holding state, the suction side facing surface 401 is on the movable side. The posture is tilted with respect to the facing surface 500.

これに伴い、吸引側対向面４０１と可動側対向面５００との間の隙間は、吸引側対向面４０１の一端側よりも吸引側対向面４０１の他端側の方が広くなっている。 Along with this, the gap between the suction side facing surface 401 and the movable side facing surface 500 is wider on the other end side of the suction side facing surface 401 than on one end side of the suction side facing surface 401.

可動本体部５０には、図２に示すように、バイメタル８によって押し操作される押操作部５２が設けられている。押操作部５２は、バイメタル８よりも、可動体５の保持状態から解除状態への切替動作時の回動方向における前方側に配置されており、バイメタル８と対向している。そのため、バイメタル８が吸引体４側に撓むと、これに伴い、押操作部５２が吸引体４側に押されるようになっている。 As shown in FIG. 2, the movable main body portion 50 is provided with a push operation portion 52 that is pushed by the bimetal 8. The push operation unit 52 is arranged on the front side of the bimetal 8 in the rotation direction during the switching operation from the holding state to the releasing state of the movable body 5, and faces the bimetal 8. Therefore, when the bimetal 8 bends toward the suction body 4, the pushing operation unit 52 is pushed toward the suction body 4.

軸部５１は、図４に示すように、軸部５１自身の軸線方向における中央部に位置し且つ可動本体部５０につながる接続部５１０と、該軸線方向における両端側に位置する一対の軸本体部５１１とを有する。各軸本体部５１１は、接続部５１０から前記横幅方向外側に向かって延出するように形成されており、先端側になるにつれて吸引体４側（可動体５の回動方向前方側）に向かうようにして傾斜している。そのため、軸本体部５１１が接続部５１０から延出する方向は、接続部５１０の軸線方向に対して傾斜している。 As shown in FIG. 4, the shaft portion 51 includes a connecting portion 510 located at the center of the shaft portion 51 itself in the axial direction and connected to the movable main body portion 50, and a pair of shaft main bodies located on both end sides in the axial direction. It has a part 511 and a part 511. Each shaft body portion 511 is formed so as to extend outward from the connecting portion 510 in the lateral width direction, and tends toward the suction body 4 side (the front side in the rotation direction of the movable body 5) toward the tip end side. It is tilted like this. Therefore, the direction in which the shaft main body portion 511 extends from the connecting portion 510 is inclined with respect to the axial direction of the connecting portion 510.

また、可動側対向面５００は、少なくともスライド時に吸引側対向面４０１の一端部に接触するように構成されている（図５参照）。本実施形態では、可動体５がスライドする前の状態から可動側対向面５００が吸引側対向面４０１の一端部に接触し、スライドした後、すなわち、回動時もまた、可動側対向面５００が吸引側対向面４０１の一端部に接触するように構成されている。 Further, the movable side facing surface 500 is configured to come into contact with one end of the suction side facing surface 401 at least during sliding (see FIG. 5). In the present embodiment, the movable side facing surface 500 comes into contact with one end of the suction side facing surface 401 from the state before the movable body 5 slides, and after sliding, that is, also during rotation, the movable side facing surface 500 Is configured to come into contact with one end of the suction side facing surface 401.

軸本体部５１１は、縦断面が多角形状（本実施形態では矩形状）であり、図６、図７に示すように、吸引体４側に向けて配置される前面５１１ａと、該前面５１１ａとは反対側の後面５１１ｂと、前面５１１ａと後面５１１ｂとに連続する一対の周縁面５１１ｃと、を有する。 The shaft main body portion 511 has a polygonal vertical cross section (rectangular shape in the present embodiment), and as shown in FIGS. 6 and 7, a front surface 511a arranged toward the suction body 4 side and the front surface 511a Has a rear surface 511b on the opposite side and a pair of peripheral surfaces 511c continuous with the front surface 511a and the rear surface 511b.

軸本体部５１１の前面５１１ａ、後面５１１ｂ、及び一対の周縁面５１１ｃは、一つながりに形成された隣接面である。また、本実施形態では、図７に示すように、前面５１１ａと各周縁面５１１ｃ、後面５１１ｂと各周縁面５１１ｃは、直交又は略直交しており、前面５１１ａと各周縁面５１１ｃとの境目、及び後面５１１ｂと各周縁面５１１ｃとの境目が稜線部５１１ｄとして構成されている。 The front surface 511a, the rear surface 511b, and the pair of peripheral surface surfaces 511c of the shaft main body portion 511 are adjacent surfaces formed in a single connection. Further, in the present embodiment, as shown in FIG. 7, the front surface 511a and each peripheral surface 511c, the rear surface 511b and each peripheral surface 511c are orthogonal or substantially orthogonal to each other, and the boundary between the front surface 511a and each peripheral surface 511c. The boundary between the rear surface 511b and each peripheral surface 511c is configured as the ridge line portion 511d.

また、本実施形態の軸本体部５１１は、打ち抜き加工により形成されており、各周縁面５１１ｃには打ち抜き加工の加工痕跡がついた粗面領域５１１ｅと、該粗面領域５１１ｅよりも平滑な平滑面領域５１１ｆとが前記軸部５１自身の板厚方向で並んでいる。そして、平滑面領域５１１ｆは、粗面領域５１１ｅよりも吸引体４に近い位置に配置されている。 Further, the shaft main body portion 511 of the present embodiment is formed by punching, and each peripheral surface 511c has a rough surface region 511e having a processing trace of punching and a smoother surface than the rough surface region 511e. The surface region 511f is aligned with the shaft portion 51 itself in the plate thickness direction. The smooth surface region 511f is arranged at a position closer to the suction body 4 than the rough surface region 511e.

ここで、ケース２は、稜線部５１１ｄに対して非接触となる状態で隣接面を受ける軸受部２４と、保持状態の可動体５の後面５１１ｂを受ける後面用受部２５とを有する。 Here, the case 2 has a bearing portion 24 that receives an adjacent surface in a state of being non-contact with the ridge line portion 511d, and a rear surface receiving portion 25 that receives the rear surface 511b of the movable body 5 in the holding state.

また、軸受部２４は、隣接面である一方の周縁面５１１ｃ（ケース２の背面２０側に位置する周縁面５１１ｃ）を受けている。本実施形態に係る軸受部２４は、前記一方の周縁面５１１ｃを受ける受面２４０と、稜線部５１１ｄから離れる方向に向かって湾曲する（外方に向かって膨らむように湾曲する）逃部２４１と、を有しており、この受面２４０で周縁面５１１ｃを受けている。さらに、受面２４０は、前記一方の周縁面５１１ｃ側に向かって凸状に湾曲する。 Further, the bearing portion 24 receives one peripheral surface surface 511c (peripheral surface 511c located on the back surface 20 side of the case 2) which is an adjacent surface. The bearing portion 24 according to the present embodiment includes a receiving surface 240 that receives the one peripheral surface 511c and an escape portion 241 that curves in a direction away from the ridge line portion 511d (curves so as to bulge outward). , And the bearing surface 240 receives the peripheral surface 511c. Further, the receiving surface 240 is curved in a convex shape toward the one peripheral surface 511c side.

受面２４０と前記一方の周縁面５１１ｃとは、常時接触するように構成されている。また、可動体５が回動する際、軸本体部５１１は受面２４０に沿って転がるようにして吸引体４側若しくは吸引体４とは反対側に移動するように構成されている。 The receiving surface 240 and the one peripheral surface 511c are configured to be in constant contact with each other. Further, when the movable body 5 rotates, the shaft body portion 511 is configured to roll along the receiving surface 240 and move to the suction body 4 side or the side opposite to the suction body 4.

受面２４０は、可動体５の回動（切替動作）時における稜線部５１１ｄの可動領域外に形成されている。また、受面２４０は、前記一方の周縁面５１１ｃ側に向かって凸状に湾曲している。さらに、受面２４０は、周縁面５１１ｃの平滑面領域５１１ｆを受けるように構成されている。 The receiving surface 240 is formed outside the movable region of the ridge line portion 511d when the movable body 5 is rotated (switching operation). Further, the receiving surface 240 is curved in a convex shape toward the one peripheral surface 511c side. Further, the receiving surface 240 is configured to receive the smooth surface region 511f of the peripheral surface 511c.

受面２４０の頂部は、前記横幅方向に沿って延びている。一方、軸本体部５１１は、図６（図５の断面線ＶＩ−ＶＩに対応する位置における回路遮断器１の断面図）に示すように、先端側になるにつれて吸引体４側に向かうようにして傾斜しているため、可動体５が保持状態である場合においては、軸本体部５１１の基端部が受面２４０の頂部の後方に配置され、軸本体部５１１の先端部が受面２４０の頂部と対応する位置（頂部の上方）に配置されている。すなわち、軸本体部５１１は、受面２４０の頂部の後方から該頂部と対応する位置に向かって延出している。 The top of the receiving surface 240 extends along the width direction. On the other hand, as shown in FIG. 6 (cross-sectional view of the circuit breaker 1 at the position corresponding to the cross-sectional line VI-VI in FIG. 5), the shaft main body portion 511 is directed toward the suction body 4 side toward the tip end side. When the movable body 5 is in the holding state, the base end portion of the shaft main body portion 511 is arranged behind the top portion of the receiving surface 240, and the tip end portion of the shaft main body portion 511 is the receiving surface 240. It is located at the position corresponding to the top of the top (above the top). That is, the shaft body portion 511 extends from the rear of the top of the receiving surface 240 toward a position corresponding to the top.

逃部２４１は、可動体５の切替動作時における稜線部５１１ｄの可動領域をかわすようにして形成されている。これにより、本実施形態に係る軸受部２４は、稜線部５１１ｄに対しては非接触となるように構成されている。なお、本実施形態の軸本体部５１１には４つの稜線部５１１ｄが含まれているため、軸受部２４には４つの逃部２４１が形成されている。 The relief portion 241 is formed so as to dodge the movable region of the ridge line portion 511d during the switching operation of the movable body 5. As a result, the bearing portion 24 according to the present embodiment is configured to be non-contact with the ridge line portion 511d. Since the shaft body portion 511 of the present embodiment includes the four ridge line portions 511d, the bearing portion 24 is formed with the four relief portions 241.

さらに、本実施形態に係る軸受部２４は、軸本体部５１１の前面（吸引体４側に向けて配置される面）の前方にスペースが形成されるように構成されており、このスペースが可動体５のスライドの動き代となる。 Further, the bearing portion 24 according to the present embodiment is configured so that a space is formed in front of the front surface (the surface arranged toward the suction body 4 side) of the shaft main body portion 511, and this space is movable. It becomes the movement allowance of the slide of the body 5.

また、上述のように、軸受部２４は、軸本体部５１１の平坦な底面を受面２４０で受けており、可動体５が前方にスライドした状態においては、可動体５の回動方向前方側（吸引体４側に回動する方向側）にスペースが形成されるように構成されている。そのため、このスペースが可動体５の回動の動き代となる。なお、可動体５の回動の動き代は、可動体５がスライドする前から形成されるようにしてもよいし、可動体５がスライドすることで形成されるようにしてもよい。 Further, as described above, the bearing portion 24 receives the flat bottom surface of the shaft main body portion 511 by the receiving surface 240, and when the movable body 5 slides forward, the movable body 5 is on the front side in the rotation direction. It is configured so that a space is formed (on the side in the direction of rotation toward the suction body 4 side). Therefore, this space serves as a movement allowance for the rotation of the movable body 5. The rotation allowance of the movable body 5 may be formed before the movable body 5 slides, or may be formed by sliding the movable body 5.

後面用受部２５は、保持状態に切り替えられている可動体５の接続部５１０の後面５１１ｂを受けるように構成されているが、例えば、軸本体部５１１の後面５１１ｂや、可動本体部５０の後面５１１ｂを受けるように構成されていてもよい。なお、接続部５１０の後面５１１ｂ、可動本体部５０の後面５１１ｂとは、軸本体部５１１の後面５１１ｂと同様、吸引体４側とは反対側に向けて配置されている面のことである。 The rear surface receiving portion 25 is configured to receive the rear surface 511b of the connecting portion 510 of the movable body 5 that has been switched to the holding state. For example, the rear surface 511b of the shaft main body portion 511 and the movable main body portion 50 It may be configured to receive the rear surface 511b. The rear surface 511b of the connecting portion 510 and the rear surface 511b of the movable main body portion 50 are surfaces arranged toward the opposite side to the suction body 4 side, like the rear surface 511b of the shaft main body portion 511.

図２に示すように、付勢手段６（以下、接触用付勢手段６と称する）は、ケース２内に位置決めされた状態で固定されており、吸引体４を可動体５側に向けて付勢するように構成されている。すなわち、可動体５は、吸引体４を介して接触用付勢手段６の付勢力を受けている。 As shown in FIG. 2, the urging means 6 (hereinafter referred to as a contact urging means 6) is fixed in a positioned state in the case 2, and the suction body 4 is directed toward the movable body 5. It is configured to be urged. That is, the movable body 5 receives the urging force of the contact urging means 6 via the suction body 4.

より具体的に説明すると、可動体５は、接触用付勢手段６の付勢力を常に受けている。そして、可動体５が保持状態である場合においては、該付勢力を受けたまま後面５１１ｂが後面用受部２５に当接している。 More specifically, the movable body 5 is constantly receiving the urging force of the contact urging means 6. When the movable body 5 is in the holding state, the rear surface 511b is in contact with the rear surface receiving portion 25 while receiving the urging force.

さらに、可動体５が解除状態に切り替わった場合（吸引体４側に移動して後面５１１ｂが後面用受部２５から離れた場合）は、前記付勢力によって後面用受部２５に当接する位置、すなわち、吸引体４から離間する方向における動き代の一端に対応する位置まで押し戻され、再び後面５１１ｂが後面用受部２５に当接する。 Further, when the movable body 5 is switched to the released state (when the movable body 5 moves to the suction body 4 side and the rear surface 511b is separated from the rear surface receiving portion 25), the position where the movable body 5 comes into contact with the rear surface receiving portion 25 by the urging force. That is, it is pushed back to a position corresponding to one end of the movement allowance in the direction away from the suction body 4, and the rear surface 511b comes into contact with the rear surface receiving portion 25 again.

このように、接触用付勢手段６は、吸引体４と可動体５の接触状態を維持するだけでなく、電路を遮断するまでの間は前記縦幅方向での可動体５の配置位置を決定し、電路を遮断した後においては可動体５の位置を初期位置に復帰させる機能を担っている。 In this way, the contact urging means 6 not only maintains the contact state between the suction body 4 and the movable body 5, but also arranges the movable body 5 in the vertical width direction until the electric path is cut off. It has a function of returning the position of the movable body 5 to the initial position after the determination is made and the electric path is cut off.

また、接触用付勢手段６は前記高さ方向において、吸引体４の回動起点（支軸２２０の位置）から可動体５の回動起点側（軸部５１側）にずれた位置（本実施形態では、吸引体４の回動起点と可動体５の回動起点の間）で吸引体４（より具体的には吸引体４の中間壁部４１）に接触するように配置されており、吸引体４を可動体５に向けて付勢している。 Further, the contact urging means 6 is displaced from the rotation starting point of the suction body 4 (position of the support shaft 220) to the rotation starting point side (shaft portion 51 side) of the movable body 5 in the height direction (mainly). In the embodiment, the suction body 4 (more specifically, the intermediate wall portion 41 of the suction body 4) is arranged so as to be in contact with the suction body 4 (between the rotation start point of the suction body 4 and the rotation start point of the movable body 5). , The suction body 4 is urged toward the movable body 5.

これに伴い、可動体５は、吸引体４を介して接触用付勢手段６の付勢力を受けているが、可動本体部５０の後面５１１ｂが後面用受部２５によって受け止められているため、縦幅方向における配置位置が定まるように構成されている。 Along with this, the movable body 5 receives the urging force of the contact urging means 6 via the suction body 4, but the rear surface 511b of the movable main body portion 50 is received by the rear surface receiving portion 25. It is configured so that the arrangement position in the vertical width direction is fixed.

開閉機構７は、ケース２外部から手動操作可能な手動操作部７０と、可動側接点部３１と固定側接点部３０とが対向する対向方向で移動可能であり且つ該移動に伴って可動側接点部３１を固定側接点部３０側に押込操作する押込操作部７１と、手動操作部７０に対する操作に連動して押込操作部７１を前記対向方向で移動させる移動操作部７２と、押込操作部７１を、可動側接点部３１が固定側接点部３０から離間する方向と同方向に向けて付勢する付勢手段（以下、押戻用付勢手段）７３と、を備えている。 The opening / closing mechanism 7 is movable in the opposite direction in which the manual operation unit 70 that can be manually operated from the outside of the case 2 and the movable side contact portion 31 and the fixed side contact portion 30 face each other, and the movable side contact is moved with the movement. A push operation unit 71 that pushes the unit 31 toward the fixed contact unit 30 side, a movement operation unit 72 that moves the push operation unit 71 in the opposite direction in conjunction with an operation on the manual operation unit 70, and a push operation unit 71. The movable side contact portion 31 is provided with an urging means 73 for urging the movable side contact portion 31 in the same direction as the direction away from the fixed side contact portion 30 (hereinafter referred to as a pushback urging means) 73.

手動操作部７０は、ケース２内に回転可能に設けられている回転部７００と、該回転部７００を回転周方向における一方側に向けて付勢する操作用付勢手段７０１と、該回転部７００からケース２外に延出する操作レバー７０２と、を有する。 The manual operation unit 70 includes a rotating unit 700 rotatably provided in the case 2, an operating urging means 701 for urging the rotating unit 700 toward one side in the rotational circumferential direction, and the rotating unit. It has an operating lever 702 that extends from 700 to the outside of the case 2.

本実施形態に係る手動操作部７０は、操作レバー７０２を操作することによって、回転部７００を回転周方向における他方側に向けて回転させると、押込操作部７１が可動側接点部３１を固定側接点部３０側に押込操作し、これにより、接点部３を閉じるように構成されている。 In the manual operation unit 70 according to the present embodiment, when the rotation unit 700 is rotated toward the other side in the rotation circumferential direction by operating the operation lever 702, the push operation unit 71 fixes the movable side contact portion 31. It is configured to close the contact portion 3 by pushing it toward the contact portion 30 side.

押込操作部７１は、可動側接点部３１が固定側接点部３０に接近する方向と同方向での移動に伴って、可動側接点部３１を固定側接点部３０に向けて押し込むように構成されており、本実施形態では、可動側接点部３１をケース２の正面２１側から固定側接点部３０側に向けて押し込むように構成されている。 The push-in operation unit 71 is configured to push the movable-side contact portion 31 toward the fixed-side contact portion 30 as the movable-side contact portion 31 moves in the same direction as the movable-side contact portion 31 approaches the fixed-side contact portion 30. In the present embodiment, the movable side contact portion 31 is pushed in from the front surface 21 side of the case 2 toward the fixed side contact portion 30 side.

移動操作部７２は、押込操作部７１に対してケース２の正面２１側で当接する押圧部材７２０と、押圧部材７２０と回転部７００とを連結するリンク部７２１と、を有する。 The moving operation unit 72 has a pressing member 720 that comes into contact with the pushing operation unit 71 on the front surface 21 side of the case 2, and a link portion 721 that connects the pressing member 720 and the rotating portion 700.

押圧部材７２０は、細長い板状に形成されており、長手方向における中央部がリンク部７２１によって回転部７００（より具体的には、回転部７００における回転中心から外れた位置）に連結されている。 The pressing member 720 is formed in an elongated plate shape, and the central portion in the longitudinal direction is connected to the rotating portion 700 (more specifically, a position deviated from the rotation center of the rotating portion 700) by the link portion 721. ..

また、押圧部材７２０は、長手方向におけるリンク部７２１の連結位置よりも一端側が押込操作部７１に当接し、且つ長手方向におけるリンク部７２１の連結位置よりも他端側が可動本体部５０に掛止可能となっている。 Further, one end of the pressing member 720 is in contact with the pushing operation portion 71 from the connecting position of the link portion 721 in the longitudinal direction, and the other end side of the link portion 721 in the longitudinal direction is hooked on the movable main body portion 50. It is possible.

なお、本実施形態では、可動本体部５０に押圧部材７２０の前記他端側を掛止するための掛止部５０１が設けられている。可動本体部５０には、吸引側対向面４０１に対して直交する方向において貫通する貫通孔が形成されており、この貫通孔を画定する縁部によって掛止部５０１が構成されている。 In this embodiment, the movable main body 50 is provided with a hooking portion 501 for hooking the other end side of the pressing member 720. The movable main body 50 is formed with a through hole that penetrates in a direction orthogonal to the suction side facing surface 401, and the hooking portion 501 is formed by an edge portion that defines the through hole.

また、押圧部材７２０の前記一端部は、手動操作部７０の回転部７００と押込操作部７１との間に配置されており、可動側接点部３１が固定側接点部３０から離間している状態においては、押込操作部７１によって回転部７００に押し付けられるように構成されている。このとき、押圧部材７２０の前記他端部は、掛止部５０１上に配置される。 Further, the one end portion of the pressing member 720 is arranged between the rotating portion 700 of the manual operation portion 70 and the pushing operation portion 71, and the movable side contact portion 31 is separated from the fixed side contact portion 30. Is configured to be pressed against the rotating unit 700 by the pushing operation unit 71. At this time, the other end of the pressing member 720 is arranged on the hooking portion 501.

本実施形態の押圧部材７２０は、回転部７００を前記回転周方向における他方側に回転させると、押圧部材７２０が回転部７００から離れる方向に移動するように構成されている。そして、押圧部材７２０は、回転部７００から離れる方向に移動すると、該押圧部材７２０の前記一端側によって押込操作部７１を押し込み（可動側接点部３１が固定側接点部３０に接近する方向と同方向に押し込み）、該押圧部材７２０の前記他端側が掛止部５０１に掛止されるように構成されている。これにより、可動側接点部３１と固定側接点部３０とが接触した状態が維持されるようになっている。 The pressing member 720 of the present embodiment is configured so that when the rotating portion 700 is rotated to the other side in the rotational circumferential direction, the pressing member 720 moves in a direction away from the rotating portion 700. Then, when the pressing member 720 moves away from the rotating portion 700, the pushing operation portion 71 is pushed by the one end side of the pressing member 720 (the same as the direction in which the movable side contact portion 31 approaches the fixed side contact portion 30). (Pushed in the direction), the other end side of the pressing member 720 is configured to be hooked on the hooking portion 501. As a result, the state in which the movable side contact portion 31 and the fixed side contact portion 30 are in contact with each other is maintained.

なお、掛止部５０１に対する押圧部材７２０の前記他端側の掛止状態が解除されると、押込操作部７１が押戻用付勢手段７３の付勢力によって押し戻されて、可動側接点部３１と固定側接点部３０との接触状態が解除されるようになっている。 When the hooking state of the other end side of the pressing member 720 with respect to the hooking portion 501 is released, the pushing operation portion 71 is pushed back by the urging force of the pushing back urging means 73, and the movable side contact portion 31 And the contact state with the fixed side contact portion 30 are released.

バイメタル８は、電路に流れる過電流により加熱され、該加熱に伴って撓むように形成されている。バイメタル８は、帯板状であり、一方の板面側の熱膨張率が他方の板面側の熱膨張率よりも高くなっている。 The bimetal 8 is heated by an overcurrent flowing through an electric circuit, and is formed so as to bend with the heating. The bimetal 8 has a strip-like shape, and the coefficient of thermal expansion on one plate surface side is higher than the coefficient of thermal expansion on the other plate surface side.

また、バイメタル８は、長手方向における一端側が可動体５の押操作部５２に対向配置されており、加熱に伴って撓む際に押操作部５２を押すように構成されている。そして、バイメタル８によって押操作部５２が押されると、可動体５は吸引体４側に回動する。 Further, the bimetal 8 is arranged so that one end side in the longitudinal direction faces the pushing operation portion 52 of the movable body 5, and pushes the pushing operation portion 52 when bending due to heating. Then, when the pushing operation unit 52 is pushed by the bimetal 8, the movable body 5 rotates toward the suction body 4.

本実施形態に係る回路遮断器１の構成は以上の通りである。本実施形態に係る回路遮断器１によれば、電路（接点部３０，３１）が開いており、且つ押圧部材７２０の前記他端部が可動本体部５０の掛止部５０１に掛止されていない状態において、可動体５の後面５１１ｂが後面用受部２５に当接している。 The configuration of the circuit breaker 1 according to the present embodiment is as described above. According to the circuit breaker 1 according to the present embodiment, the electric circuit (contact portions 30, 31) is open, and the other end of the pressing member 720 is hooked on the hooking portion 501 of the movable main body portion 50. In the absence state, the rear surface 511b of the movable body 5 is in contact with the rear surface receiving portion 25.

また、電路（接点部３０，３１）を閉じて押圧部材７２０を可動本体部５０に掛止する際、すなわち、可動体５を保持状態に切り替える際においても、可動体５の後面５１１ｂは後面用受部２５に当接したままである（図８、図９参照）。 Further, even when the electric path (contact portions 30, 31) is closed and the pressing member 720 is hooked on the movable main body portion 50, that is, when the movable body 5 is switched to the holding state, the rear surface 511b of the movable body 5 is for the rear surface. It remains in contact with the receiving portion 25 (see FIGS. 8 and 9).

なお、電路（接点部３０，３１）を閉じて押圧部材７２０を掛止部５０１に掛止すると、可動体５は、押圧部材７２０からの外力（前面５１１ａ側から後面５１１ｂ側に向かう外力）を受けるが、該可動体５の軸部５１が軸受部２４によって受け止められているため、前記高さ方向での可動体５の位置ずれが防止される。 When the electric path (contact portions 30, 31) is closed and the pressing member 720 is hooked on the hooking portion 501, the movable body 5 exerts an external force (external force from the front surface 511a side to the rear surface 511b side) from the pressing member 720. However, since the shaft portion 51 of the movable body 5 is received by the bearing portion 24, the displacement of the movable body 5 in the height direction is prevented.

そして、電路に過大電流が流れると、吸引体４が磁力を発生させ、この磁力によって可動体５が吸引体４側へのスライドし（図１０、図１１参照）、また、回動する（図１２、図１３参照）。なお、可動体５のスライドと回動とは同時に起こってもよい。 Then, when an excessive current flows through the electric circuit, the suction body 4 generates a magnetic force, and the magnetic force causes the movable body 5 to slide toward the suction body 4 (see FIGS. 10 and 11) and rotate (see FIGS. 10 and 11). 12, see FIG. 13). The slide and rotation of the movable body 5 may occur at the same time.

本実施形態の回路遮断器１では、可動体５が保持状態に切り替えられている状態においては、可動体５と吸引体４、より具体的には可動側対向面５００と吸引側対向面４０１の前記一端部とが接触しているため、電路に過大電流が流れてから可動体５が動き始めるまでの応答速度（吸引体４側にスライドし始めるまでの応答速度）が速くなる。すなわち、電路に過大電流が流れてから可動体５が動き始めるまでの応答時間が短縮される。 In the circuit breaker 1 of the present embodiment, when the movable body 5 is switched to the holding state, the movable body 5 and the suction body 4, more specifically, the movable side facing surface 500 and the suction side facing surface 401. Since the one end is in contact with the electric circuit, the response speed from when the excessive current flows through the electric circuit until the movable body 5 starts to move (the response speed until the movable body 5 starts to slide toward the suction body 4) becomes high. That is, the response time from the excessive current flowing through the electric circuit to the start of movement of the movable body 5 is shortened.

また、可動体５が可動側対向面５００と吸引側対向面４０１の前記一端部とが接触しているため、電路に小さな過大電流（従来の回路遮断器が瞬時引外しできる範囲の短絡電流よりも低い領域の短絡電流）が流れた場合であっても可動体５がスライドする。このように、回路遮断器１では、可動体５の感度も高まる。 Further, since the movable body 5 is in contact with the movable side facing surface 500 and the one end portion of the suction side facing surface 401, a small excessive current in the electric circuit (from a short circuit current in a range that can be instantaneously pulled out by a conventional circuit breaker). The movable body 5 slides even when a short-circuit current in a low region) flows. In this way, in the circuit breaker 1, the sensitivity of the movable body 5 is also increased.

さらに、回路遮断器１では、可動体５が保持状態に切り替わっている場合、可動側対向面５００が軸部５１側であるほど吸引側対向面４０１側に位置するように傾斜するため、吸引体４と可動体５との間のスペースは軸部５１側であるほど狭くなる。そして、可動体５が吸引体４に生じた磁力を受けて軸部５１が吸引体４側に動くと、前記スペースの軸部５１側がさらに狭まるため、前記磁力が可動体５に伝わり易くなり、可動体５の動作速度を速めることができる。 Further, in the circuit breaker 1, when the movable body 5 is switched to the holding state, the movable body facing surface 500 is inclined so as to be located on the suction side facing surface 401 side as the shaft portion 51 side is closer. The space between the 4 and the movable body 5 becomes narrower toward the shaft portion 51 side. Then, when the movable body 5 receives the magnetic force generated in the suction body 4 and the shaft portion 51 moves toward the suction body 4, the shaft portion 51 side of the space is further narrowed, so that the magnetic force is easily transmitted to the movable body 5. The operating speed of the movable body 5 can be increased.

また、吸引体４は、回転可能であるため、可動体５の回動に合わせて吸引側対向面４０１の向きが変わる。本実施形態では、吸引体４の回動起点が吸引側対向面４０１の他端部側に設定されており、スライドする可動体５によって吸引側対向面４０１の一端部側が押し操作される。このとき、吸引側対向面４０１の他端部側は可動側対向面５００に接近する方向に移動するため、可動体５のスライド前に可動側対向面５００と吸引側対向面４０１との間隔をより狭めておくことができる。 Further, since the suction body 4 is rotatable, the direction of the suction side facing surface 401 changes according to the rotation of the movable body 5. In the present embodiment, the rotation starting point of the suction body 4 is set on the other end side of the suction side facing surface 401, and the sliding movable body 5 pushes the one end side of the suction side facing surface 401. At this time, since the other end side of the suction side facing surface 401 moves in the direction approaching the movable side facing surface 500, the distance between the movable side facing surface 500 and the suction side facing surface 401 is set before the sliding of the movable body 5. It can be narrowed down.

そして、可動体５がスライドの動き代の分だけ吸引体４側にスライド（進出）すると、可動側対向面５００と吸引側対向面４０１との間のスペースがさらに狭まる。これに伴い、吸引体４と可動体５の間の磁気抵抗が小さくなるため、吸引体４の磁力が可動体５に伝わり易くなる。これにより、可動体５が吸引体４側に回動する動作速度が速まる。従って、本実施形態に係る回路遮断器１は、可動体５が動き始めてから電路を遮断するまでの動作時間を短縮でき、遮断時の応答性を向上させることができるという優れた効果を奏し得る。 Then, when the movable body 5 slides (advances) toward the suction body 4 by the amount of the movement allowance of the slide, the space between the movable side facing surface 500 and the suction side facing surface 401 is further narrowed. Along with this, the magnetic resistance between the attractive body 4 and the movable body 5 becomes small, so that the magnetic force of the attractive body 4 is easily transmitted to the movable body 5. As a result, the operating speed at which the movable body 5 rotates toward the suction body 4 is increased. Therefore, the circuit breaker 1 according to the present embodiment can exert an excellent effect that the operation time from the start of movement of the movable body 5 to the interruption of the electric circuit can be shortened and the responsiveness at the time of interruption can be improved. ..

なお、可動体５が保持状態に切り替えられている場合、この可動体５は、接触用付勢手段６によって吸引体４から離間する方向に向けて付勢された状態で動き代の前記一端に位置し、且つ後面５１１ｂが後面用受部２５に当接するため、保持状態に切り替えられている可動体５を前記動き代の一端に留めておくことができる。従って、可動体５が保持状態に切り替えられ、且つ電路に過大電流が流れる前の状態においては、可動体５と吸引体４との間隔を一定の距離で保つことができ、これにより、可動体５の切替動作の安定性を高めることができる。 When the movable body 5 is switched to the holding state, the movable body 5 is urged by the contact urging means 6 in a direction away from the suction body 4 to the one end of the movement allowance. Since the rear surface 511b is in contact with the rear surface receiving portion 25, the movable body 5 that has been switched to the holding state can be kept at one end of the movement allowance. Therefore, before the movable body 5 is switched to the holding state and an excessive current flows through the electric circuit, the distance between the movable body 5 and the suction body 4 can be maintained at a constant distance, whereby the movable body 5 can be maintained. The stability of the switching operation of 5 can be improved.

なお、本発明の回路遮断器は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々の変更を加え得ることは勿論である。 The circuit breaker of the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

上記実施形態において、可動側接点部３１と固定側接点部３０とは前記高さ方向において対向配置されていたが、この構成に限定されない。例えば、可動側接点部３１と固定側接点部３０とは前記縦幅方向において対向配置されていてもよいし、前記高さ方向に対して交差（傾斜）する方向において対向配置されていてもよい。 In the above embodiment, the movable side contact portion 31 and the fixed side contact portion 30 are arranged to face each other in the height direction, but the present invention is not limited to this configuration. For example, the movable side contact portion 31 and the fixed side contact portion 30 may be arranged to face each other in the vertical width direction, or may be arranged to face each other in a direction intersecting (inclining) with respect to the height direction. ..

上記実施形態において、可動側接点部３１が固定側接点部３０よりもケース２の正面２１側に配置されていたが、この構成に限定されない。例えば、可動側接点部３１は、固定側接点部３０よりもケース２の背面２０面側に配置されていてもよい。 In the above embodiment, the movable side contact portion 31 is arranged on the front surface 21 side of the case 2 with respect to the fixed side contact portion 30, but the present invention is not limited to this configuration. For example, the movable side contact portion 31 may be arranged on the back surface 20 surface side of the case 2 with respect to the fixed side contact portion 30.

上記実施形態では、吸引体４を前記高さ方向に対して傾斜させた姿勢で配置することによって、吸引側対向面４０１が可動側対向面５００に対して傾斜するように構成されていたが、この構成に限定されない。例えば、吸引体４を前記高さ方向に対して傾けずに配置し、吸引側対向面４０１を前記高さ方向に対して傾斜する傾斜面で構成したり、吸引体４に対して可動体５が傾いた姿勢で配置されていたりしてもよい。 In the above embodiment, the suction body 4 is arranged in an inclined posture with respect to the height direction so that the suction side facing surface 401 is inclined with respect to the movable side facing surface 500. It is not limited to this configuration. For example, the suction body 4 is arranged without being tilted with respect to the height direction, and the suction side facing surface 401 is configured with an inclined surface tilting with respect to the height direction, or the movable body 5 is arranged with respect to the suction body 4. May be arranged in an inclined posture.

上記実施形態では、吸引側対向面４０１が可動側対向面５００に対して傾斜するように構成されていたが、この構成に限定されない。例えば、吸引側対向面４０１と可動側対向面５００とが平行となるように構成されていてもよい。この場合、可動体５が待機状態、若しくは保持状態であると、吸引側対向面４０１全体が可動側対向面５００から離間する。 In the above embodiment, the suction side facing surface 401 is configured to be inclined with respect to the movable side facing surface 500, but the present invention is not limited to this configuration. For example, the suction side facing surface 401 and the movable side facing surface 500 may be configured to be parallel to each other. In this case, when the movable body 5 is in the standby state or the holding state, the entire suction-side facing surface 401 is separated from the movable-side facing surface 500.

上記実施形態において、吸引側対向面４０１は、前記一端部側が可動側対向面５００に接近するようにして傾斜していたが、この構成に限定されない。例えば、吸引側対向面４０１は、前記他端部側が可動側対向面５００に接近するようにして傾斜していてもよい。 In the above embodiment, the suction side facing surface 401 is inclined so that the one end side approaches the movable side facing surface 500, but the present invention is not limited to this configuration. For example, the suction side facing surface 401 may be inclined so that the other end side approaches the movable side facing surface 500.

上記実施形態において、吸引体４は回転可能であったが、この構成に限定されない。例えば、吸引体４は回転不能であってもよい。 In the above embodiment, the suction body 4 is rotatable, but is not limited to this configuration. For example, the suction body 4 may be non-rotatable.

上記実施形態において、吸引体４の回動起点は、吸引側対向面４０１の前記一端部側に設定されていたが、この構成に限定されない。例えば、吸引体４の回動起点は、吸引側対向面４０１の前記他端部側、若しくは前記高さ方向における吸引体４の中央部に設定されていてもよい。なお、吸引側対向面４０１を可動側対向面５００に対して傾けて配置している場合、吸引体４の回動起点は、前記一端部及び前記他端部のうち、可動側対向面５００に近い方の端部側に設定されていることが好ましい。 In the above embodiment, the rotation starting point of the suction body 4 is set to the one end side of the suction side facing surface 401, but the present invention is not limited to this configuration. For example, the rotation starting point of the suction body 4 may be set to the other end side of the suction side facing surface 401 or the central portion of the suction body 4 in the height direction. When the suction side facing surface 401 is arranged at an angle with respect to the movable side facing surface 500, the rotation starting point of the suction body 4 is located on the movable side facing surface 500 of the one end portion and the other end portion. It is preferable that it is set on the closer end side.

上記実施形態の軸受部２４では、受面２４０と逃部２４１とが連続していたが、この構成に限定されない。例えば、受面２４０と逃部２４１とは非連続であってもよい。 In the bearing portion 24 of the above embodiment, the receiving surface 240 and the relief portion 241 are continuous, but the present invention is not limited to this configuration. For example, the receiving surface 240 and the escape portion 241 may be discontinuous.

上記実施形態の軸受部２４は、逃部２４１を湾曲した形状にすることで稜線部５１１ｄとの接触を防止できるように構成されていたが、この構成に限定されない。例えば、軸受部２４に切欠を形成することにより、軸受部２４と稜線部５１１ｄとの接触を防止できるようにしてもよい。 The bearing portion 24 of the above embodiment is configured so that contact with the ridge line portion 511d can be prevented by forming the relief portion 241 into a curved shape, but the present invention is not limited to this configuration. For example, by forming a notch in the bearing portion 24, contact between the bearing portion 24 and the ridge line portion 511d may be prevented.

上記実施形態において、掛止部５０１は、可動本体部５０に貫通孔を形成することにより構成されていたが、この構成に限定されない。例えば、掛止部５０１は、押圧部材７２０の前記他端側を掛止できれば、可動本体部５０に凸部を設けたり、凹部を形成したりすることによって構成されていてもよい。 In the above embodiment, the hooking portion 501 is configured by forming a through hole in the movable main body portion 50, but is not limited to this configuration. For example, the hooking portion 501 may be configured by providing a convex portion or forming a concave portion on the movable main body portion 50 as long as the other end side of the pressing member 720 can be hooked.

上記実施形態において、可動側対向面５００は、吸引側対向面４０１に接触するように構成されていたが、この構成に限定されない。例えば、可動側対向面５００は、吸引側対向面４０１に対して非接触となるように構成されていてもよい。 In the above embodiment, the movable side facing surface 500 is configured to come into contact with the suction side facing surface 401, but the present invention is not limited to this configuration. For example, the movable side facing surface 500 may be configured to be non-contact with the suction side facing surface 401.

上記実施形態において、可動側対向面５００は、可動体５が保持状態に切り替えられている状態で且つ可動体５が吸引体４側にスライドする前から吸引側対向面４０１に接触するように構成されていたが、この構成に限定されない。例えば、可動側対向面５００は、保持状態においては、吸引側対向面４０１に対して非接触であり、可動体５の吸引体４側へのスライド時に吸引側対向面４０１に接触するように構成されていてもよい。 In the above embodiment, the movable side facing surface 500 is configured to come into contact with the suction side facing surface 401 even before the movable body 5 is switched to the holding state and before the movable body 5 slides to the suction body 4 side. However, it is not limited to this configuration. For example, the movable side facing surface 500 is not in contact with the suction side facing surface 401 in the holding state, and is configured to come into contact with the suction side facing surface 401 when the movable body 5 slides to the suction body 4 side. It may have been done.

上記実施形態において、軸本体部５１１は、４つの稜線部５１１ｄを有するように形成されていたが、この構成に限定されない。例えば、軸本体部５１１は、４つ未満の稜線部５１１ｄ、若しくは５以上の稜線部５１１ｄを有するように形成されていてもよい。 In the above embodiment, the shaft body portion 511 is formed so as to have four ridge line portions 511d, but the present invention is not limited to this configuration. For example, the shaft body portion 511 may be formed so as to have less than four ridgeline portions 511d or five or more ridgeline portions 511d.

上記実施形態において、軸本体部５１１は、縦断面が矩形状であり、４つの隣接面を有するように構成されていたが、この構成に限定されない。例えば、軸本体部５１１には、少なくとも２つの隣接面が形成されていればよい。 In the above embodiment, the shaft body portion 511 has a rectangular vertical cross section and is configured to have four adjacent surfaces, but the present invention is not limited to this configuration. For example, at least two adjacent surfaces may be formed on the shaft body portion 511.

上記実施形態において、軸本体部５１１の底面が平坦面、軸受部２４の受面２４０が湾曲面となっていたが、この構成に限定されない。可動体５が稜線部５１１ｄが非接触の状態で動くことができれば、軸本体部５１１の底面を湾曲面、軸受部２４の受面２４０を平坦面としてもよい。また、軸受部２４の受面２４０は、例えば、段状、具体的には、吸引体４側が低くなるような段状に形成されていてもよい。 In the above embodiment, the bottom surface of the shaft body portion 511 is a flat surface, and the receiving surface 240 of the bearing portion 24 is a curved surface, but the present invention is not limited to this configuration. If the movable body 5 can move in a state where the ridge line portion 511d is not in contact with each other, the bottom surface of the shaft main body portion 511 may be a curved surface and the receiving surface 240 of the bearing portion 24 may be a flat surface. Further, the receiving surface 240 of the bearing portion 24 may be formed in a stepped shape, specifically, in a stepped shape so that the suction body 4 side is lowered.

上記実施形態において、軸受部２４で受け止められている周縁面５１１ｃは平坦な面であったが、この構成に限定されない。例えば、軸受部２４で受け止められている周縁面５１１ｃは湾曲していてもよい。但し、周縁面５１１ｃが平坦な面である方が軸本体部５１１の位置（可動体５の回動起点の位置）がずれにくくなる。 In the above embodiment, the peripheral surface 511c received by the bearing portion 24 is a flat surface, but the present invention is not limited to this configuration. For example, the peripheral surface 511c received by the bearing portion 24 may be curved. However, when the peripheral surface 511c is a flat surface, the position of the shaft main body 511 (the position of the rotation starting point of the movable body 5) is less likely to shift.

１…回路遮断器、２…ケース、３…接点部、４…吸引体、５…可動体、６…付勢手段（接触用付勢手段）、７…開閉機構、８…バイメタル、２０…背面、２１…正面、２２…横側面、２３…縦側面、２４…軸受部、２５…後面用受部、３０…固定側接点部、３１…可動側接点部、４０…側壁部、４１…中間壁部、５０…可動本体部、５１…軸部、５２…押操作部、７０…手動操作部、７１…押込操作部、７２…移動操作部、７３…付勢手段（押戻用付勢手段）、２２０…支軸、２４０…受面、４００…軸孔、４０１…吸引側対向面、５００…可動側対向面、５０１…掛止部、５１０…接続部、５１１…軸本体部、５１１ａ…前面、５１１ｂ…後面、５１１ｃ…周縁面、５１１ｄ…稜線部、５１１ｅ…粗面領域、５１１ｆ…平滑面領域、７００…回転部、７０１…操作用付勢手段、７０２…操作レバー、７２０…押圧部材、７２１…リンク部、Ｔ１…電源側の端子、Ｔ２…負荷側の端子 1 ... circuit breaker, 2 ... case, 3 ... contact part, 4 ... suction body, 5 ... movable body, 6 ... urging means (contact urging means), 7 ... opening / closing mechanism, 8 ... bimetal, 20 ... back , 21 ... front, 22 ... horizontal side, 23 ... vertical side, 24 ... bearing, 25 ... rear receiving part, 30 ... fixed side contact, 31 ... movable side contact, 40 ... side wall, 41 ... intermediate wall Unit, 50 ... Movable body part, 51 ... Shaft part, 52 ... Push operation part, 70 ... Manual operation part, 71 ... Push operation part, 72 ... Movement operation part, 73 ... Biasing means (pushing back urging means) , 220 ... Support shaft, 240 ... Receiving surface, 400 ... Shaft hole, 401 ... Suction side facing surface, 500 ... Movable side facing surface, 501 ... Hooking part, 510 ... Connecting part, 511 ... Shaft body part, 511a ... Front surface , 511b ... Rear surface, 511c ... Peripheral surface, 511d ... Ridge line part, 511e ... Rough surface area, 511f ... Smooth surface area, 700 ... Rotating part, 701 ... Operation urging means, 702 ... Operation lever, 720 ... Pressing member, 721 ... Link part, T1 ... Power supply side terminal, T2 ... Load side terminal

Claims

With the case
The electric circuit that connects the terminal on the power supply side and the terminal on the load side,
A contact part that opens and closes the electric path,
An attractive body that becomes an electromagnet by the current flowing in the electric circuit,
The closed state of the contact portion can be held and the holding state is arranged so as to face the suction body with a gap, and the holding state of the contact portion with respect to the closed state is released by rotating toward the suction body side. It is equipped with a movable body that is configured to take a switching operation that switches to the release state that allows the contact part to be opened.
The movable body has a shaft portion that serves as a starting point of the rotation.
The case has a bearing portion that receives the shaft portion and has a bearing portion.
Shaft receiving portion, when the movable member is in the holding state, configured to space the movement allowance for sliding into the suction side of the shaft portion is set,
Circuit breaker.

An urging means for urging the movable body in a direction away from the suction body so as to allow the slide within the range of the movement allowance while the movable body is at least switched to the holding state. With,
The circuit breaker according to claim 1.

The movable body has a front surface in which the movable body is arranged toward the rotation direction side during the switching operation from the holding state to the release state, and a rear surface in which the movable body is arranged toward the side opposite to the rotation direction. And have
The case has a rear surface receiving portion that receives the rear surface.
The movable body is arranged at one end of the movement allowance in a direction away from the suction body while being in the holding state and receiving the urging force from the urging means, and the rear surface is the rear surface receiving receiver. Constructed to abut the part,
The circuit breaker according to claim 2.

It is equipped with an opening / closing mechanism that opens / closes the contact portion.
The contact portion has a fixed side terminal fixed in the case and a movable side terminal arranged to face the fixed side terminal so as to be in contact with and detached from the fixed side terminal.
The opening / closing mechanism can be moved so as to bring the movable terminal into contact with the fixed terminal.
The movable body has a movable body side receiving portion for receiving the opening / closing mechanism in a state where the movable side terminal is being moved.
The case has a case-side receiving portion that receives the movable body in a state where the movable body-side receiving portion receives the opening / closing mechanism.
The circuit breaker according to any one of claims 1 to 3.

The suction body has a suction side facing surface that is arranged toward the movable body side.
The movable body has a movable side facing surface that is arranged to face the suction side facing surface.
The movable side facing surface is inclined so that one end side is closer to the suction side facing surface than the other end side when the movable body is in the holding state.
The shaft portion is provided at either one end or a position shifted from the one end to the side opposite to the other end side.
The circuit breaker according to any one of claims 1 to 4.