JP7282406B2

JP7282406B2 - circuit breaker

Info

Publication number: JP7282406B2
Application number: JP2021118700A
Authority: JP
Inventors: 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: 2021-07-19
Publication date: 2023-05-29
Anticipated expiration: 2039-03-20
Also published as: JP2020155329A; JP6921421B2; JP2021168307A

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。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for protecting devices on the load side by breaking the circuit when an excessive current flows in the circuit connecting the power supply side and the load side.

上記の回路遮断器には、例えば、特許文献１に図示されているように、短絡電流のような過大電流が流れた際に互いに接離可能に配置された第一鉄心及び第二鉄心と、該第二鉄心に開閉機構の一部をなす作動板を係止させた状態で、固定接点と可動接点とを接触又は離間させるものが知られている。 For example, as shown in Patent Document 1, the above circuit breaker includes a first core and a second core that are arranged to be able to contact and separate from each other when an excessive current such as a short circuit current flows, It is known that the fixed contact and the movable contact are brought into contact with or separated from each other in a state in which an operating plate forming a part of the opening/closing mechanism is engaged with the second iron core.

かかる回路遮断器では、過大電流が流れた際に第一鉄心と第二鉄心との間に吸引力が生じ、該吸引力により第二鉄心が第一鉄心側に引き寄せられることで、第二鉄心と作動板との掛止状態を解除して固定接点と可動接点とを離間させる、すなわち、磁力を利用して電路を遮断することができるようになっている。 In such a circuit breaker, an attractive force is generated between the first iron core and the second iron core when an excessive current flows, and the second iron core is attracted to the first iron core side by the attractive force, so that the second iron core The fixed contact and the movable contact are separated by releasing the latched state between the contact and the operating plate.

特開２００２－２５４１５号公報JP-A-2002-25415

ところで、上記構成の回路遮断器では、過大電流が流れた際に電路を遮断することはできるものの、安全性を高めるべくより素早く電路を遮断できるようにすることが求められている。 By the way, although the circuit breaker having the above configuration can break the electric circuit when an excessive current flows, it is required to be able to cut off the electric circuit more quickly in order to improve safety.

そこで、本発明は、かかる実情に鑑み、遮断時の応答性を向上させることが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 improving responsiveness at the time of breaking.

本発明の回路遮断器は、
電源側の端子と負荷側の端子とに繋がる回路と、
該回路を開閉する接点部と、
前記回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、且つ前記吸引体に対して前記吸引体側への動き代となる隙間をあけて対向配置される保持状態と、前記吸引体側に動いた状態で、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替可能な可動体と、を備え、
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、
前記吸引側対向面と前記可動側対向面とは、前記可動体が前記保持状態であるときに、接離可能な隙間を形成するよう互いに離間する接離部を有し、
前記可動体と前記吸引体は、別々の位置に配置される回動起点として回動可能であり、前記可動体は、前記可動側対向面が有する前記接触部よりも前記一方側にずれた位置を回動起点として回動可能であり前記可動体の前記回動起点よりも前記接離部から離れた位置を回動起点として前記可動体に対して接離する方向で回動可能に構成される。 The circuit breaker of the present invention is
a circuit connected to the terminals on the power supply side and the terminals on the load side;
a contact portion that opens and closes the circuit;
an attracting body that becomes an electromagnet by the current flowing through the circuit;
The holding state in which the closed state of the contact portion can be maintained and is arranged opposite to the attracting body with a gap serving as a movement allowance toward the attracting body, and the state in which the contact moves toward the attracting body. a movable body that can be switched to a released state in which the closed state of the contact portion is released and the contact portion can be opened;
The attracting body has an attracting-side facing surface arranged toward the movable body,
The movable body has a movable-side facing surface that faces the suction-side facing surface,
the attraction-side facing surface and the movable-side facing surface have contact and separation portions that are separated from each other so as to form a gap that allows contact and separation when the movable body is in the held state;
The movable body and the attracting body are rotatable as rotation starting points arranged at different positions, and the movable body is at a position shifted to the one side from the contact portion of the movable-side facing surface. and can rotate in a direction of contacting and separating from the movable body with a position farther from the contact/separation portion than the rotation starting point of the movable body as a rotation starting point. be.

従って、回路に過大電流が流れてから可動体が動き出すまでの反応速度が速くなり、これにより、遮断時の応答性を向上させることができる。 Therefore, the reaction speed from when the excessive current flows through the circuit to when the movable body starts to move is increased, thereby improving the responsiveness at the time of interruption.

以上のように、本発明の回路遮断器は、動作速度を速くすることによって、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。 As described above, the circuit breaker of the present invention can exhibit the excellent effect of being able to improve the responsiveness at the time of breaking by increasing the operating speed.

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 one embodiment of the 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筐体の内部の拡大図である。FIG. 3 is an enlarged view of the inside of the housing 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吸引体の取付構造の説明図である。FIG. 4 is an explanatory diagram of the attachment structure of the attractor of the circuit breaker according to the embodiment. 図５は、同実施形態に係る回路遮断器の可動体の取付構造の説明図である。FIG. 5 is an explanatory diagram of the mounting structure of the movable body of the circuit breaker according to the embodiment. 図６は、同実施形態に係る回路遮断器の吸引体を可動体側から見た図である。FIG. 6 is a view of the attracting body of the circuit breaker according to the same embodiment as viewed from the movable body side. 図７は、同実施形態に係る回路遮断器の吸引体を筐体の正面側から見た図である。FIG. 7 is a view of the attracting body of the circuit breaker according to the same embodiment as viewed from the front side of the housing. 図８は、同実施形態に係る回路遮断器の可動体の斜視図である。FIG. 8 is a perspective view of the movable body of the circuit breaker according to the same embodiment. 図９は、同実施形態に係る回路遮断器の動作説明図であって、接点部を閉じている状態の説明図である。FIG. 9 is an explanatory diagram of the operation of the circuit breaker according to the embodiment, and is an explanatory diagram of a state in which the contact portion is closed. 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、接点部を開いている状態の説明図である。FIG. 10 is an explanatory diagram of the operation of the circuit breaker according to the embodiment, and is an explanatory diagram of a state in which the contact portion is open. 図１１は、図９の領域ＸＩの拡大図である。FIG. 11 is an enlarged view of area XI in FIG. 図１２は、図１０の領域ＸＩＩの拡大図である。12 is an enlarged view of area XII of FIG. 10. FIG.

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。 A circuit breaker according to one embodiment of the present invention will be described below with reference to the accompanying drawings.

回路遮断器は、異常な電流が流れたときに回路を遮断して負荷側に繋がる機器等を保護するためのものである。 A circuit breaker is for protecting a device or the like connected to a load side by interrupting a circuit when an abnormal current flows.

回路遮断器１は、図１に示すように、筐体２と、図２に示すように、電源側と負荷側とを電気的に接続する回路３と、前記回路３に流れる電流により電磁石となる吸引体４と、前記接点部３１の閉状態を保持可能であり、且つ前記吸引体４に対して前記吸引体４側への動き代となる隙間をあけて対向配置される保持状態と、前記吸引体４側に動いた状態で
、前記接点部３１の閉状態に対する保持を解除して前記接点部３１を開放可能とする解除状態とに切替可能な可動体５と、吸引体４を可動体５に向けて付勢する付勢部材（以下、接触用付勢部材と称する）６と、接点部３１を開閉操作可能な操作機構７と、を備えている。 The circuit breaker 1 includes a housing 2 as shown in FIG. 1, a circuit 3 electrically connecting a power supply side and a load side as shown in FIG. and a holding state in which the closed state of the contact portion 31 can be maintained and is arranged opposite to the attraction body 4 with a gap serving as a movement allowance toward the attraction body 4 side; A movable body 5 that can be switched to a released state in which the closed state of the contact portion 31 is released and the contact portion 31 can be opened while moving toward the attracting body 4; A biasing member (hereinafter referred to as a contact biasing member) 6 for biasing the body 5 and an operation mechanism 7 capable of opening and closing the contact portion 31 are provided.

筐体２には、図１に示すように、回路遮断器１を分電盤に取り付けた状態において手前側に配置される一面である正面２０と、該正面２０とは反対側の一面（使用時において分電盤への取り付け面に対向配置される一面）である背面２１と、正面２０と背面２１とに連続し、且つ互いに対向配置される一対の側面２２と、が含まれている。筐体２の側面２２は、回路遮断器１が分電盤に設置された状態において、別の回路遮断器１の筐体２の側面２２と対向する面である。 As shown in FIG. 1, the housing 2 has a front surface 20, which is one surface arranged on the front side when the circuit breaker 1 is attached to the distribution board, and one surface opposite to the front surface 20 (use It includes a rear surface 21 which is sometimes arranged opposite to the mounting surface to the distribution board) and a pair of side surfaces 22 which are continuous with the front surface 20 and the rear surface 21 and arranged to face each other. The side surface 22 of the housing 2 faces the side surface 22 of the housing 2 of another circuit breaker 1 when the circuit breaker 1 is installed on the distribution board.

なお、本実施形態では、筐体２の正面２０と背面２１とが並ぶ方向を前後方向、一対の側面２２が並ぶ方向を横幅方向、前後方向と横幅方向のそれぞれに直交する方向を縦幅方向、と称して以下の説明を行うこととする。なお、筐体２は、別体で構成される２つの分割体を前記横幅方向で付き合わせて接合することによって構成されている。 In this embodiment, the direction in which the front face 20 and the back face 21 of the housing 2 are aligned is the front-rear direction, the direction in which the pair of side surfaces 22 are aligned is the width direction, and the direction perpendicular to each of the front-rear direction and the width direction is the vertical width direction. , and the following description will be given. Note that the housing 2 is constructed by joining together two separate divided bodies in the widthwise direction.

回路３は、図２に示すように、分電盤に接続される一対の入力端子３０と、該一対の入力端子３０を繋ぐ電路を開閉可能な接点部３１と、を有する。また、回路３では、各入力端子３０に対して接点部３１が一つずつ設けられている。 As shown in FIG. 2 , the circuit 3 has a pair of input terminals 30 connected to a distribution board, and a contact portion 31 capable of opening and closing an electric circuit connecting the pair of input terminals 30 . Also, in the circuit 3 , one contact portion 31 is provided for each input terminal 30 .

以下の説明において、接点部３１が前記電路を閉じている状態を閉状態、接点部が前記電路を開いている状態を開状態と称して以下の説明を行うこととする。 In the following description, a state in which the contact portion 31 closes the electric circuit is called a closed state, and a state in which the contact portion opens the electric circuit is called an open state.

各接点部３１は、筐体２内で固定された固定側端子３１０と、該固定側端子３１０に対して接離可能な可動側端子３１１と、を有する。 Each contact portion 31 has a fixed-side terminal 310 fixed within the housing 2 and a movable-side terminal 311 capable of contacting and separating from the fixed-side terminal 310 .

可動側端子３１１は、弾性変形可能な細長い金属板で構成されている。可動側端子３１１の長手方向における一端（基端）側は、筐体２内に位置決め（固定）されている。 The movable-side terminal 311 is composed of an elastically deformable elongated metal plate. One end (base end) side in the longitudinal direction of the movable terminal 311 is positioned (fixed) inside the housing 2 .

そして、可動側端子３１１の長手方向における他端（先端）側は、接点部３１が前記開状態に切り替わっている状態においては、前記前後方向における手前側で固定側端子３１０に対して間隔をあけて配置されている。そのため、可動側端子３１１は前記操作機構７により操作されることによって、固定側端子３１０に向かって撓む（弾性変形する）ことで、該可動側端子３１１の先端部が該固定側端子３１０に当接する（すなわち、前記閉状態に切り替わる）ように構成されている。 In the state where the contact portion 31 is switched to the open state, the other end (tip) side in the longitudinal direction of the movable side terminal 311 is spaced from the fixed side terminal 310 on the front side in the front-rear direction. are placed. Therefore, when the movable-side terminal 311 is operated by the operation mechanism 7 , the movable-side terminal 311 is bent (elastically deformed) toward the fixed-side terminal 310 . It is configured to abut (that is, switch to the closed state).

吸引体４は、回路に流れる電流の大きさに応じた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１１に示すように、可動体５に向けて配置される吸引側対向面４０を有する。吸引側対向面４０には、可動体５が前記保持状態であるときに、一方側の部分（吸引体４が動く際の起点（後述する回動軸２２０）側に配置される部分）で可動体５（可動体５の後述する可動側対向面）に接触する接触部（以下、吸引側接触部と称する）４００と、他方側の部分で可動体５（可動体５の後述する可動側対向面）に接離可能な接離部（以下、吸引側接離部と称する）４０１と、が含まれている。 The attracting body 4 is configured to generate a magnetic force corresponding to the magnitude of the current flowing through the circuit. As shown in FIG. 11, the suction body 4 according to this embodiment has a suction-side facing surface 40 that faces the movable body 5 . When the movable body 5 is in the holding state, the suction-side facing surface 40 has a portion on one side (a portion arranged on the side of a starting point (rotating shaft 220 described later) when the suction body 4 moves) that is movable. A contact portion (hereinafter referred to as a suction side contact portion) 400 that contacts the body 5 (a movable side facing surface described later of the movable body 5), and a portion on the other side that contacts the movable body 5 (a movable side facing surface described later of the movable body 5). A contact/separation portion (hereinafter referred to as a suction-side contact/separation portion) 401 that can be contacted and separated from the surface) is included.

本実施形態に係る吸引体４は、図６に示すように、前記横幅方向において間隔をあけて対向配置される一対の側壁部４１と、該一対の側壁部４１のそれぞれに連設される連設壁部４２とを有する。 As shown in FIG. 6, the suction body 4 according to the present embodiment includes a pair of side wall portions 41 that are arranged to face each other with a gap in the width direction, and a series connecting portion that is connected to each of the pair of side wall portions 41 . and a wall portion 42 .

一対の側壁部４１は、壁面を前記横幅方向に向けた状態で互いに平行となるように配置されている。 The pair of side wall portions 41 are arranged so as to be parallel to each other with their wall surfaces directed in the width direction.

吸引側対向面４０は、側壁部４１のうちの可動体５に対向する部分によって構成されている。本実施形態に係る吸引側対向面４０には、図３に示すように、前記縦幅方向において可動体５に対向する吸引側第一領域４０ａと、該吸引側第一領域４０ａに連続し、且つ前記前後方向（具体的には、前後方向における前方側）に向けて配置された状態で可動体５と対向する吸引側第二領域４０ｂと、が含まれており、吸引側接触部４００と吸引側接離部４０１とは吸引側第一領域４０ａ内に位置している。 The suction-side facing surface 40 is configured by a portion of the side wall portion 41 that faces the movable body 5 . As shown in FIG. 3, the suction-side facing surface 40 according to the present embodiment includes a suction-side first region 40a that faces the movable body 5 in the longitudinal width direction, and a suction-side first region 40a that is continuous with the suction-side first region 40a. and a suction side second region 40b facing the movable body 5 in a state of being arranged in the front-rear direction (specifically, the front side in the front-rear direction). The suction side contact/separation portion 401 is positioned within the suction side first region 40a.

吸引側第一領域４０ａは、常態（保持状態から保持解除状態に切り替わる動作をとっていない状態）においては、吸引側接離部４０１が吸引側接触部４００よりも可動体５から離れた場所に位置するようにして前記縦幅方向に対して傾斜している。また、吸引側第一領域４０ａは、一対の側壁部４１における正面側の端面（可動体５側に向けて配置されている端面）で構成されているため、細長い平面となっている。 The first suction-side region 40a is located at a position where the suction-side contact/separation portion 401 is further from the movable body 5 than the suction-side contact portion 400 in a normal state (a state in which the held state is not switched to the released state). It is inclined with respect to the vertical width direction so as to be positioned. In addition, since the suction side first region 40a is constituted by the front end faces (the end faces arranged toward the movable body 5 side) of the pair of side wall portions 41, the suction side first region 40a is an elongated flat surface.

側壁部４１では、吸引側第二領域４０ｂの後端と側壁部４１の端面（正面２０側の端面）とに連続する領域は、傾斜面４１ａとなっている。そのため、側壁部４１は、吸引側第二領域４０ｂの後端よりも前方側では、前記前後方向における幅（すなわち、高さ）が一定であり、吸引側第二領域４０ｂよりも後方側では、連設壁部４２側になるにつれて前記前後方向における幅が徐々に小さくなるように形成されている。 In the side wall portion 41, a region that is continuous with the rear end of the suction-side second region 40b and the end surface of the side wall portion 41 (the end surface on the side of the front surface 20) is an inclined surface 41a. Therefore, the side wall portion 41 has a constant width (that is, height) in the front-rear direction on the front side of the rear end of the second suction side region 40b, and on the rear side of the second suction side region 40b, The width in the front-rear direction is formed so as to gradually decrease toward the continuous wall portion 42 side.

さらに、一対の側壁部４１のそれぞれは、筐体２の側面２２の内側に回動可能に取り付けられている。より具体的に説明すると、図４に示すように、一対の側壁部４１のそれぞれは、前記横幅方向に沿って延びる軸線を中心として回動可能となるように構成されている。本実施形態では、側壁部４１に貫通孔４１０が形成されており、この貫通孔４１０に筐体２の側面２２の内側から前記横幅方向における内側に向けて突設された回動軸２２０が挿通されている。 Further, each of the pair of side wall portions 41 is rotatably attached inside the side surface 22 of the housing 2 . More specifically, as shown in FIG. 4, each of the pair of side wall portions 41 is configured to be rotatable around an axis extending along the widthwise direction. In this embodiment, a through hole 410 is formed in the side wall portion 41, and a rotating shaft 220 protruding from the inside of the side surface 22 of the housing 2 toward the inside in the width direction is inserted into the through hole 410. It is

また、貫通孔４１０は、吸引側接触部４００から他方側にずれた位置、すなわち、吸引側接離部４０１側にずれた位置に形成されている。なお、本実施形態では、前記前後方向における中央部よりも吸引側接離部４０１側にずれた位置に貫通孔４１０が形成されている。 Further, the through hole 410 is formed at a position shifted to the other side from the suction side contact portion 400 , that is, a position shifted to the suction side contact/separation portion 401 side. In this embodiment, the through hole 410 is formed at a position shifted toward the suction side contact/separation portion 401 from the central portion in the front-rear direction.

このように、吸引体４では、回動軸２２０が回動起点となっており、吸引側接触部４００と吸引側接離部４０１とが、該貫通孔４１０に挿通された回動軸２２０を中心とする周方向に沿って回動するようになっている。 As described above, in the suction body 4 , the rotary shaft 220 serves as a rotation starting point, and the suction-side contact portion 400 and the suction-side contact/separate portion 401 move around the rotary shaft 220 inserted through the through hole 410 . It rotates along the circumferential direction around the center.

なお、回動軸２２０の先端側は、少なくとも前記縦幅方向における寸法が貫通孔４１０の孔径よりも小さくなっている。そのため、吸引体４は、貫通孔４１０を画定する縁部と回動軸２２０との間に形成される隙間の範囲内で前記縦幅方向にスライド可能でもある。 Note that the tip side of the rotating shaft 220 is smaller than the diameter of the through hole 410 at least in the vertical width direction. Therefore, the suction body 4 is also slidable in the longitudinal width direction within the range of the gap formed between the edge defining the through hole 410 and the rotation shaft 220 .

連設壁部４２は、図７に示すように、各側壁部４１の可動体５側とは反対側の端部同士に連設されており、可動体５側に向けて配置される面（以下、内面と称する）も、可動体５側とは反対側に向けて配置される面（以下、外面と称する）も平らである。 As shown in FIG. 7, the connecting wall portion 42 is connected to the end portions of the side wall portions 41 on the side opposite to the movable body 5 side, and the surfaces facing the movable body 5 side ( Both the inner surface and the surface facing away from the movable body 5 (hereinafter referred to as the outer surface) are flat.

本実施形態に係る可動体５は、図８に示すように、吸引体４に対向配置する可動体本体部５１と、可動体５を筐体２内に取り付けるための取付部５２と、を有する。 As shown in FIG. 8, the movable body 5 according to the present embodiment has a movable body main body portion 51 arranged opposite to the attracting body 4 and a mounting portion 52 for mounting the movable body 5 inside the housing 2. .

可動体本体部５１は、図３に示すように、吸引体４の角部（吸引側第一領域４０ａと吸引側第二領域４０ｂとで形成されている角部）に合わせて屈曲している。本実施形態に係る可動体本体部５１は、吸引側第一領域４０ａに対向する第一対向部５１０と、第一対向部５１０から吸引体４側に延出し且つ吸引側第二領域４０ｂに対向する第二対向部５１１と、を有する。 As shown in FIG. 3, the movable body main body 51 is bent to match the corners of the suction body 4 (the corners formed by the first suction-side region 40a and the second suction-side region 40b). . The movable body main body portion 51 according to the present embodiment includes a first facing portion 510 that faces the first suction side region 40a, and a first facing portion 510 that extends toward the suction body 4 and faces the second suction side region 40b. and a second facing portion 511 that

第一対向部５１０は、平板状であり、一方の板面が吸引側第一領域４０ａに対向配置されている。また、第二対向部５１１も平板状であり、一方の板面が吸引側第二領域４０ｂに対向配置されている。 The first facing portion 510 has a flat plate shape, and one plate surface is arranged to face the suction side first region 40a. The second facing portion 511 is also flat, and one plate surface is arranged to face the suction side second region 40b.

第一対向部５１０は、吸引体４の前記前後方向における幅（高さ）に対応する寸法、より具体的には、吸引側第一領域４０ａの長さに対応する寸法が、該吸引側第一領域４０ａよりも大きくなるように形成されている。 The first opposing portion 510 has a dimension corresponding to the width (height) of the suction body 4 in the front-rear direction, more specifically, a dimension corresponding to the length of the suction-side first region 40a. It is formed to be larger than the one region 40a.

さらに、可動体５は、吸引側対向面４０に対向配置される可動側対向面５０を有する。この可動側対向面５０には、自身の状態が前記保持状態に切り替わっている状態において、吸引側接触部４００に接触する接触部（以下、可動側接触部と称する）５００と、吸引側接離部４０１に対して接離可能な隙間をあけて配置される接離部（以下、可動側接離部と称する）５０１と、が含まれている。 Further, the movable body 5 has a movable-side facing surface 50 arranged to face the suction-side facing surface 40 . The movable-side facing surface 50 includes a contact portion (hereinafter referred to as a movable-side contact portion) 500 that contacts the suction-side contact portion 400 when the state of the movable-side facing surface 50 is switched to the holding state, and a suction-side contact/separation contact portion 500 . and a contact/separation portion (hereinafter referred to as a movable side contact/separation portion) 501 arranged with a gap that can be contacted and separated from the portion 401 .

本実施形態の可動側対向面５０には、吸引側第一領域４０ａに対向する可動側第一領域５０ａと、可動側第一領域５０ａに連続する可動側第二領域５０ｂであって、吸引側第二領域４０ｂに対向する可動側第二領域５０ｂとが含まれている。そして、上記の可動側接触部５００、可動側接離部５０１は、可動側第一領域５０ａ内に設定されている。 The movable-side facing surface 50 of the present embodiment includes a first movable-side region 50a facing the first suction-side region 40a and a second movable-side region 50b continuous with the first movable-side region 50a. A movable side second region 50b facing the second region 40b is included. The movable side contact portion 500 and the movable side contact/separation portion 501 are set within the movable side first region 50a.

可動側第一領域５０ａは、第一対向部５１０の前記一方の板面で構成されており、可動側第二領域５０ｂは第二対向部５１１の前記他方の板面で構成されている。 The movable-side first region 50 a is configured by the one plate surface of the first facing portion 510 , and the movable-side second region 50 b is configured by the other plate surface of the second facing portion 511 .

また、可動体本体部５１は、常態（保持状態である場合）においては、前記前後方向に沿って真っすぐに延びた姿勢となるように配置され、可動側接触部５００が吸引側接触部４００に接触する。すなわち、可動側第一領域５０ａが吸引側第一領域４０ａに対して部分的に接触する。 In addition, the movable body main body 51 is arranged so as to extend straight along the front-rear direction in the normal state (when in the held state), and the movable side contact portion 500 is aligned with the suction side contact portion 400 . Contact. That is, the movable-side first region 50a partially contacts the suction-side first region 40a.

本実施形態では、可動側第一領域５０ａのうちの可動体５の回動起点側（本実施形態では、筐体２の背面２１側）が吸引側接触部４００に接触し、可動側第一領域５０ａのうちの可動体５の回動起点側とは反対側（本実施形態では、筐体２の正面２１側）が吸引側接離部４０１に接離するため、可動側接触部５００が可動側第一領域５０ａの前記回動起点側の部分に設定され、可動側接離部５０１が可動側第一領域５０ａの前記反対側の部分に設定されている。 In this embodiment, the rotation starting point side of the movable body 5 (in this embodiment, the back surface 21 side of the housing 2) in the movable side first region 50a contacts the suction side contact portion 400, Since the side of the region 50a opposite to the rotation starting point side of the movable body 5 (the front face 21 side of the housing 2 in this embodiment) contacts and separates from the suction side contact portion 401, the movable side contact portion 500 The movable side first region 50a is set at the rotation starting point side portion, and the movable side contact/separation portion 501 is set at the opposite side portion of the movable side first region 50a.

また、可動体本体部５１には、図８に示すように、接点部３１の閉状態を保持する際に利用する掛止保持部５３が形成されている。掛止保持部５３は、可動体本体部５１の一方の板面と他方の板面とに亘って貫設された孔であるが、例えば、他方の板面側のみで開口する凹部、若しくは他方の板面から突出する凸部により構成されていてもよい。 Further, as shown in FIG. 8, the movable body main body 51 is formed with a latch holding portion 53 that is used to hold the closed state of the contact portion 31 . The latch holding portion 53 is a hole penetrating through one plate surface and the other plate surface of the movable body main portion 51. For example, a recess opening only on the other plate surface side, or It may be configured by a convex portion protruding from the plate surface of the.

取付部５２は、可動体本体部５１を筐体２内に対して回動可能に取り付けるように構成されており、可動体５の回動起点となるように構成されている。 The attachment portion 52 is configured to rotatably attach the movable body main portion 51 to the inside of the housing 2 , and is configured to serve as a rotation starting point of the movable body 5 .

本実施形態に係る取付部５２は、図５に示すように、軸線方向における中央部に位置し且つ可動体本体部５１につながる接続部５２０と、取付部５２自身の軸線方向における両端側に位置する一対の軸本体部５２１とを有する。各軸本体部５２１は、接続部５２０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５２１が接続部５２０から延出する方向は、接続部５２０の軸線方向に対して傾斜している。 As shown in FIG. 5, the mounting portion 52 according to the present embodiment includes a connection portion 520 located in the central portion in the axial direction and connected to the movable body main portion 51, and a connecting portion 520 located on both end sides in the axial direction of the mounting portion 52 itself. and a pair of shaft body portions 521 that Each shaft main body portion 521 is formed to extend outward in the lateral width direction from the connection portion 520, and as it becomes closer to the distal end side, it moves toward the suction body 4 side (the front side in the rotation direction of the movable body 5). so it is slanted. Therefore, the direction in which the shaft body portion 521 extends from the connection portion 520 is inclined with respect to the axial direction of the connection portion 520 .

ここで、筐体２には、図５に示すように、軸本体部５２１を回動可能に受ける軸受部２２１が設けられている。 Here, as shown in FIG. 5, the housing 2 is provided with a bearing portion 221 that rotatably receives the shaft body portion 521 .

軸受部２２１は、筐体２における側面２２の内面から前記横幅方向内側に延出している。また、本実施形態に係る軸受部２２１は、環状に形成されており、前記横幅方向における内側から軸本体部５２１が挿し込まれている。なお、軸受部２２１は、軸本体部５２１の数に対応して筐体２内に２つ形成されている。 The bearing portion 221 extends inward in the lateral width direction from the inner surface of the side surface 22 of the housing 2 . Moreover, the bearing portion 221 according to the present embodiment is formed in an annular shape, and the shaft body portion 521 is inserted from the inner side in the width direction. Two bearing portions 221 are formed in the housing 2 corresponding to the number of the shaft body portions 521 .

軸受部２２１は、軸本体部５２１の一端を受ける受面２２１ａを含むように構成されており、可動体５が回動する際、軸本体部５２１は受面２２１ａ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 bearing portion 221 is configured to include a receiving surface 221a that receives one end of the shaft body portion 521. When the movable body 5 rotates, the shaft body portion 521 rolls along the receiving surface 221a and is attracted. It is configured to move to the side of the body 4 or to the side opposite to the suction body 4 .

一方、軸受部２２１は、前記前後方向における前方側（正面２２側）における軸本体部５２１との間や、前記縦幅方向における軸本体部５２１との間には隙間が形成されるように構成されている。 On the other hand, the bearing portion 221 is configured such that a gap is formed between it and the shaft main body portion 521 on the front side (front 22 side) in the longitudinal direction and between it and the shaft main body portion 521 in the longitudinal width direction. It is

取付部５２は、可動体本体部５１における筐体２の背面２１側に配置される端部に連設されており、軸本体部５２１が、前記横幅方向において、可動体本体部５１の両側よりも外側に延出している。また、取付部５２は、側面２２の内側に形成された凹状の軸受部２２１内に回動可能に挿入されている。 The mounting portion 52 is connected to an end portion of the movable body main body 51 that is arranged on the rear surface 21 side of the housing 2 , and the shaft main body 521 extends from both sides of the movable body main body 51 in the width direction. also extends outward. Also, the mounting portion 52 is rotatably inserted into a concave bearing portion 221 formed inside the side surface 22 .

さらに、取付部５２は、吸引側接触部４００と可動側接触部５００との接触位置を基準として筐体２の背面２１側にずれた位置に配置されている。そのため、可動体５の回動起点は、吸引体４の回動起点に対しても、前記前後方向でずれた位置（筐体２の背面２１側にずれた位置）に配置されている。これにより、可動体５は、取付部５２を回動起点として、可動側接離部５０１を吸引側接離部４０１に対して接離させるようにして回動できるようになっている。 Further, the mounting portion 52 is arranged at a position shifted toward the back surface 21 side of the housing 2 with reference to the contact position between the suction side contact portion 400 and the movable side contact portion 500 . Therefore, the starting point of rotation of the movable body 5 is also arranged at a position shifted in the front-rear direction (position shifted toward the back surface 21 side of the housing 2 ) with respect to the starting point of rotation of the suction body 4 . As a result, the movable body 5 can be rotated with the mounting portion 52 as a rotation starting point so that the movable side contact/separation portion 501 is brought into contact with/separate from the suction side contact/separation portion 401 .

接触用付勢部材６は、図３に示すように、筐体２内に位置決めされた状態で固定されており、前記吸引体４の連設壁部４２を可動体５側に向けて付勢するように構成されている。 As shown in FIG. 3, the contact urging member 6 is fixed in position within the housing 2 and urges the connecting wall portion 42 of the attracting body 4 toward the movable body 5 side. is configured to

また、接触用付勢部材６は、前記前後方向において、吸引体４の回動起点から可動体５の回動起点側にずれた位置（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を可動体５に向けて付勢するように構成されている。 Further, the contact urging member 6 is located at a position shifted from the rotation starting point of the attracting body 4 toward the rotation starting point side of the movable body 5 in the front-rear direction (in the present embodiment, the contact biasing member 6 is shifted from the rotation starting point of the attracting body 4 to the movable body 5 side). It is configured to urge the suction body 4 toward the movable body 5 between the rotation starting points of the body 5 .

これにより、吸引体４は、常態においては、吸引側接触部４００が可動側接触部５００に近付くようにして傾斜した姿勢になっており、また、吸引側接触部４００が可動側接触部５００に押されると、吸引側接触部４００と可動側接触部５００との接触状態を保ったまま、吸引側接離部４０１が可動側接離部５０１に接近するようにして回動する。 As a result, in a normal state, the suction body 4 is in an inclined posture so that the suction-side contact portion 400 approaches the movable-side contact portion 500 , and the suction-side contact portion 400 moves toward the movable-side contact portion 500 . When pressed, the suction side contact portion 401 and the movable side contact portion 500 are kept in contact with each other, and the suction side contact portion 401 rotates so as to approach the movable side contact portion 501 .

操作機構７は、図２に示すように、筐体２の外部から操作可能な操作部７０と、操作部７０の操作に伴って、回路遮断器１の状態を、接点部３１が開いている開状態と、接点部３１が閉じられている閉状態とに切り替える切替構造７１と、を備えている。 As shown in FIG. 2 , the operation mechanism 7 includes an operation unit 70 that can be operated from the outside of the housing 2 , and a state of the circuit breaker 1 that is opened according to the operation of the operation unit 70 . A switching structure 71 for switching between an open state and a closed state in which the contact portion 31 is closed is provided.

操作部７０は、前記横幅方向に沿って延びる回動軸線を中心として回動可能なベース部７００と、該ベース部７００から筐体２の外部に延出するレバー部７０１と、を有する。 The operating portion 70 has a base portion 700 rotatable around a rotation axis extending along the width direction, and a lever portion 701 extending from the base portion 700 to the outside of the housing 2 .

切替構造７１は、接点部３１を閉状態と開状態とに切り替える、すなわち、可動側端子３１１を固定側端子３１０に接離させる切替部材７１０と、該切替部材７１０を付勢する開放用付勢部材７１１と、操作部７０の操作により切替部材７１０を作動させるための作動構造７１２と、を有する。 The switching structure 71 switches the contact portion 31 between the closed state and the open state. It has a member 711 and an operating structure 712 for operating the switching member 710 by operating the operating portion 70 .

切替部材７１０は、前記前後方向に沿ってスライド可能であり、前記前後方向における後方側（筐体２の正面２０から背面２１側に向かう方向）へのスライドに伴い、可動側端子３１１を固定側端子３１０に向けて押し付け、前記前後方向における手前側（筐体２の背面２１から正面２０側に向かう方向）へのスライドに伴い、可動側端子３１１に対する押付状態を解除するように構成されている。 The switching member 710 is slidable along the front-rear direction, and the movable-side terminal 311 moves toward the fixed side as the switching member 710 slides rearward (in the direction from the front surface 20 toward the rear surface 21 of the housing 2) in the front-rear direction. It is configured to press against the terminal 310 and release the pressed state against the movable-side terminal 311 as it slides toward the front side in the front-rear direction (the direction from the rear surface 21 toward the front surface 20 of the housing 2). .

開放用付勢部材７１１は、切替部材７１０を前記前後方向における手前側に向けて付勢している。なお、開放用付勢部材７１１は、常に切替部材７１０に付勢力を与えるように構成されていてもよいし、切替部材７１０が筐体２の正面２０側から背面２１側にスライドした際に、切替部材７１０に付勢力を与えるように構成されていてもよい。 The opening biasing member 711 biases the switching member 710 toward the front side in the front-rear direction. The opening biasing member 711 may be configured to always apply a biasing force to the switching member 710, and when the switching member 710 slides from the front surface 20 side to the rear surface 21 side of the housing 2, It may be configured to apply a biasing force to the switching member 710 .

作動構造７１２は、操作部７０に接続されるリンク部材７１２ａと、該リンク部材７１２ａに取り付けられる押込部材７１２ｂと、を有する。 The actuating structure 712 has a link member 712a connected to the operating portion 70 and a pushing member 712b attached to the link member 712a.

リンク部材７１２ａは、前記横幅方向に沿って操作部７０に挿通される操作部側軸部７１２ａａと、該操作部側軸部７１２ａａに繋がり、前記横幅方向に沿って押込部材７１２ｂに挿通される押込部側軸部７１２ａｂとを有する。 The link member 712a includes an operation portion-side shaft portion 712aa that is inserted through the operation portion 70 along the width direction, and a push-in member that is connected to the operation portion-side shaft portion 712aa and is inserted through the pushing member 712b along the width direction. and a side shaft portion 712ab.

また、リンク部材７１２ａは、操作部７０の一方側への回転に伴い、押込部材７１２ｂを前記前後方向における後方側に押し込み、また、操作部７０の他方側への回転に伴い、押込部材７１２ｂを前記前後方向における手前側に引き寄せるように構成されている。 Further, the link member 712a pushes the pushing member 712b rearward in the front-rear direction as the operating portion 70 rotates to one side, and pushes the pushing member 712b as the operating portion 70 rotates to the other side. It is configured to pull toward the front side in the front-rear direction.

押込部材７１２ｂは、押込部側軸部７１２ａｂが挿通されるベース部７１２ｂａと、該ベース部７１２ｂａから延出し、且つ掛止保持部５３内に差込可能な差込片部７１２ｂｂと、該ベース部７１２ｂａから差込片部７１２ｂｂとは反対側に延出し、且つ切替部材７１０を押込操作可能な押込片部７１２ｂｃと、を有する。 The pushing member 712b includes a base portion 712ba through which the pushing portion side shaft portion 712ab is inserted, an insertion piece portion 712bb that extends from the base portion 712ba and can be inserted into the latch holding portion 53, and the base portion. A pushing piece portion 712bc that extends from 712ba to the side opposite to the insertion piece portion 712bb and that allows the switching member 710 to be pushed.

ベース部７１２ｂａは、前記横幅方向に沿って押込部側軸部７１２ａｂが挿通されており、該押込部側軸部７１２ａｂを中心として回転可能となっている。そのため、押込部側軸部７１２ａｂに対するベース部７１２ｂａの回転により、差込片部７１２ｂｂと押込片部７１２ｂｃも、押込部側軸部７１２ａｂを中心として回転する。 The pushing-in portion-side shaft portion 712ab is inserted through the base portion 712ba along the width direction, and the base portion 712ba is rotatable around the pushing-in portion-side shaft portion 712ab. Therefore, when the base portion 712ba rotates with respect to the push-in portion side shaft portion 712ab, the insertion piece portion 712bb and the push-in piece portion 712bc also rotate around the push-in portion side shaft portion 712ab.

差込片部７１２ｂｂは、掛止保持部５３内に挿通され且つリンク部材７１２ａがベース部７１２ｂａを引き上げている状態においては、該掛止保持部５３の内面に対して前記前後方向における手前側で掛止され、掛止保持部５３内に挿通され且つリンク部材７１２ａがベース部７１２ｂａを押し込んでいる状態においては、該掛止保持部５３の内面に対して前記前後方向における後方側で掛止されるように構成されている。 In a state in which the insertion piece 712bb is inserted into the latch holding portion 53 and the link member 712a is pulling up the base portion 712ba, the insertion piece 712bb is positioned on the front side of the inner surface of the latch holding portion 53 in the front-rear direction. In a state in which the link member 712a is inserted into the hook holding portion 53 and the base portion 712ba is being pushed in, the inner surface of the hook holding portion 53 is hooked on the rear side in the front-rear direction. is configured as follows.

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。続いて、回路遮断器１の動作説明を行う。 The configuration of the circuit breaker 1 according to this embodiment is as described above. Next, the operation of the circuit breaker 1 will be explained.

回路遮断器１を使用して負荷側の電路に通電を行なう場合は、筐体２を分電盤に取り付けた後に、各接点部３１を閉じる。本実施形態では、図９、図１１に示すように、操作部７０を回動させると、リンク部材７１２ａが押込部材７１２ｂを筐体２の背面２１側に向けて押し込む。 When the circuit breaker 1 is used to energize the electric circuit on the load side, each contact portion 31 is closed after the housing 2 is attached to the distribution board. In this embodiment, as shown in FIGS. 9 and 11 , when the operating portion 70 is rotated, the link member 712 a pushes the pushing member 712 b toward the rear surface 21 side of the housing 2 .

このとき、差込片部７１２ｂｂが掛止保持部５３に掛止されているため、差込片部７１２ｂｂに対して押込片部７１２ｂｃが前記前後方向における後方側に移動する。 At this time, since the insertion piece portion 712bb is hooked by the latch holding portion 53, the push piece portion 712bc moves rearward in the front-rear direction with respect to the insertion piece portion 712bb.

さらに、切替部材７１０が押込部材７１２ｂによって前記前後方向における後方側に押し込まれて移動し、さらに、該切替部材７１０によって可動側端子３１１が固定側端子３１０に向けて押し込まれる。 Further, the switching member 710 is pushed rearward in the front-rear direction by the pushing member 712 b to move, and the movable terminal 311 is pushed toward the fixed terminal 310 by the switching member 710 .

そして、可動側端子３１１と固定側端子３１０とが接触することで、電路が閉じた状態に切り替わる。 When the movable-side terminal 311 and the fixed-side terminal 310 come into contact with each other, the electric circuit is switched to a closed state.

切替部材７１０、押込部材７１２ｂには、開放用付勢部材７１１による付勢力（前記前後方向における手前側への付勢力）がかかるが、リンク部材７１２ａの押し込みにより切替部材７１０、押込部材７１２ｂの前記前後方向における手前側への動きがロックされているため、可動側端子３１１と固定側端子３１０とを接触させた状態（回路を閉じた状態）が維持される。すなわち、可動体５が保持状態に切り替わる。 The switching member 710 and the pushing member 712b are subjected to the biasing force of the opening biasing member 711 (the biasing force toward the front side in the front-rear direction). Since the frontward movement in the front-rear direction is locked, the contact state (circuit closed state) between the movable terminal 311 and the fixed terminal 310 is maintained. That is, the movable body 5 switches to the holding state.

可動体５が保持状態に切り替えられた状態においては、吸引側接触部４００と可動側接触部５００とが接触する一方で、吸引側接離部４０１と可動側接離部５０１とは離間している。このように、吸引側対向面４０（吸引側第一領域４０ａ）と可動側対向面５０（可動側第一領域５０ａ）との間の隙間は、吸引側接触部４００と可動側接触部５００とが部分的に接触することによって、吸引側接触部４００及び可動側接触部５００側に向かうにつれて狭くなっている。そのため、可動体５の吸引体４側への動き代を確保しつつ、可動体５が保持状態であるときの前記隙間を小さく抑えることができる。 When the movable body 5 is switched to the holding state, the suction side contact portion 400 and the movable side contact portion 500 are in contact with each other, while the suction side contact/separation portion 401 and the movable side contact/separation portion 501 are separated from each other. there is Thus, the gap between the suction-side facing surface 40 (suction-side first region 40a) and the movable-side facing surface 50 (movable-side first region 50a) is are partially in contact with each other, they become narrower toward the suction side contact portion 400 and the movable side contact portion 500 side. Therefore, it is possible to keep the gap small when the movable body 5 is in the holding state while ensuring the movement allowance of the movable body 5 toward the suction body 4 side.

また、前記隙間が小さくなることで、吸引体４と可動体５との間の磁気抵抗も小さくなるため、かかる状態で回路３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）が流れると吸引体４と可動体５との間には大きな吸引力が発生し、この吸引力によって可動体５が吸引体４側に素早く回動し始める（すなわち、可動体５の反応速度が速くなる）。 In addition, since the magnetic resistance between the attracting body 4 and the movable body 5 is also reduced by reducing the gap, an excessive current (that is, a magnetic force strong enough to attract the movable body to the attracting body) is applied to the circuit 3 in such a state. ) flows, a large attractive force is generated between the attracting body 4 and the movable body 5, and this attractive force causes the movable body 5 to quickly start rotating toward the attracting body 4 (that is, the movable body 5 reaction rate is faster).

また、可動体５が吸引体４側に回動する際、可動側接触部５００が吸引側接触部４００を押すため、吸引体４が回動軸２２０を中心として回動し、吸引側接離部４０１が可動側接離部５０１に向かって動く。そのため、吸引側接離部４０１と可動側接離部５０１とは、互いに接近する方向に動く。 Further, when the movable body 5 rotates toward the suction body 4 side, the movable side contact portion 500 pushes the suction side contact portion 400, so that the suction body 4 rotates around the rotation shaft 220, and the suction side contacts and separates. The portion 401 moves toward the movable side contact/separation portion 501 . Therefore, the suction side contacting/separating part 401 and the movable side contacting/separating part 501 move toward each other.

そして、掛止保持部５３から差込片部７１２ｂｂが外れると、図１０、図１２に示すように、ロックされた状態が解除されるため、開放用付勢部材７１１の付勢力により切替部材７１０と押込部材７１２ｂとが前記前後方向における手前側に付勢されることによって、可動側端子３１１が固定側端子３１０から離間し、電路が開かれる（すなわち、回路３が遮断される）。 10 and 12, when the insertion piece 712bb is removed from the latch holding portion 53, the locked state is released. , and the pushing member 712b are urged forward in the front-rear direction, the movable terminal 311 is separated from the fixed terminal 310, and the electrical path is opened (that is, the circuit 3 is cut off).

以上のように、本実施形態に係る回路遮断器１によれば、可動体５が保持状態であるとき、すなわち、可動体５が接点部３１の閉状態を保持している状態においては、吸引側対向面４０の吸引側第一領域４０ａと可動側対向面５０の可動側第一領域５０ａとが部分的に接触した状態で吸引側第一領域４０ａが可動側第一領域５０ａに対して傾斜した姿勢となるため、吸引側第一領域４０ａと可動側第一領域５０ａとの間の隙間は、吸引側接触部４００及び可動側接触部５００側に向かうにつれて狭くなる。 As described above, according to the circuit breaker 1 according to the present embodiment, when the movable body 5 is in the holding state, that is, in a state where the movable body 5 holds the contact portion 31 in the closed state, the attraction The suction side first region 40a of the side facing surface 40 and the movable side first region 50a of the movable side facing surface 50 are partially in contact with each other, and the suction side first region 40a is inclined with respect to the movable side first region 50a. As a result, the gap between the suction side first region 40a and the movable side first region 50a becomes narrower toward the suction side contact portion 400 and the movable side contact portion 500 side.

これにより、吸引側接触部４００及び可動側接触部５００の近傍領域では、吸引側第一領域４０ａと可動側第一領域５０ａとの間の磁気抵抗が小さくなるため、回路３に過大電流（すなわち、吸引体４に可動体５を引き寄せる強さの磁力を生じさせる電流）が流れたときに吸引体４と可動体５との間には大きな吸引力が発生する。 As a result, the magnetic resistance between the attraction-side first region 40a and the movable-side first region 50a is reduced in the regions near the attraction-side contact portion 400 and the movable-side contact portion 500, causing an excessive current (that is, , a current that generates a magnetic force strong enough to attract the movable body 5 to the attracting body 4 , a large attractive force is generated between the attracting body 4 and the movable body 5 .

従って、回路３に過大電流が流れてから可動体５が動き出すまでの反応速度が速くなり、これにより、遮断時（いわゆる、瞬時引外し時）の応答性が向上する。 Therefore, the reaction speed from the flow of excessive current to the circuit 3 to the start of movement of the movable body 5 is increased, thereby improving the responsiveness at the time of interruption (so-called momentary tripping).

そして、回路３に過大電流が流れた際に可動体５が吸引体４側に回動すると、可動側接触部５００が吸引側接触部４００を押し操作する。このとき、可動側接離部５０１は吸引側対向面４０（吸引側接離部４０１）に向かって動き、且つ吸引側接離部４０１は可動側対向面５０（可動側接離部５０１）に向かって動く。 When the movable body 5 rotates toward the attracting body 4 when an excessive current flows through the circuit 3 , the movable side contact portion 500 pushes the attracting side contact portion 400 . At this time, the movable side contact/separation portion 501 moves toward the suction side facing surface 40 (suction side contact/separation portion 401), and the suction side contact/separation portion 401 moves toward the movable side facing surface 50 (movable side contact/separation portion 501). move toward

このように、可動体５と吸引体４とは、互いの間の隙間を狭めるようにして接近し合うため、可動体５が回動し始めた後においては、前記隙間が素早く狭まり、前記隙間が狭まるほど磁気抵抗が小さくなって吸引力は強くなるから、これに伴い、可動体５を吸引体４側に引き寄せるための吸引力が素早く高まる。 In this way, the movable body 5 and the suction body 4 approach each other while narrowing the gap between them. Since the smaller the magnetic resistance and the stronger the attractive force, the narrower the gap, the stronger the attractive force for drawing the movable body 5 toward the attractive body 4 side.

従って、回路遮断器１では、回路３に過大電流が流れたときに可動体５の動作速度が速くなる結果、可動体５が吸引体４側に素早く引き寄せられ、これにより、短時間で接点部３１を開放可能な状態にすることができる。 Therefore, in the circuit breaker 1, when an excessive current flows through the circuit 3, the operating speed of the movable body 5 increases, and as a result, the movable body 5 is quickly attracted to the attracting body 4 side, whereby the contact portion is opened in a short time. 31 can be made openable.

このように、上記構成の回路遮断器１は、回路３に過大電流が流れて可動体５が吸引体４側に回動し始める際に吸引体４と可動体５との間に大きな吸引力を発生させることができ、可動体５が吸引体４側に回動し始めた後は前記吸引力を素早く高めることができるため、接点部３１を開放可能な状態にすることができる。 Thus, in the circuit breaker 1 having the above configuration, when an excessive current flows through the circuit 3 and the movable body 5 starts rotating toward the attracting body 4, a large attractive force is generated between the attracting body 4 and the movable body 5. can be generated, and the attraction force can be quickly increased after the movable body 5 starts to rotate toward the attraction body 4, so that the contact portion 31 can be opened.

従って、本実施形態に係る回路遮断器１は、遮断時の応答性が良いものとすることができるという優れた効果を奏し得る。 Therefore, the circuit breaker 1 according to the present embodiment can exhibit an excellent effect of being able to have good responsiveness at the time of breaking.

また、本実施形態の吸引体４は、吸引側接触部４００が形成されている一端側とは反対側の他端側に寄せて回動起点が設けられているため、可動側接触部５００に吸引側接触部４００が押されたときに可動体５に生じる回転モーメントが大きくなり、より素早く吸引体４が可動体５側に動くようにすることができる。 In addition, since the suction body 4 of the present embodiment is provided with a rotation starting point near the other end side opposite to the one end side where the suction side contact portion 400 is formed, the movable side contact portion 500 When the suction-side contact portion 400 is pushed, the rotational moment generated in the movable body 5 is increased, and the suction body 4 can be moved to the movable body 5 side more quickly.

また、本実施形態の回路遮断器１では、吸引側対向面４０の吸引側第一領域４０ａと可動側対向面５０の可動側第一領域５０ａとが対向するだけでなく、吸引側対向面４０の吸引側第二領域４０ｂと可動側対向面５０の可動側第二領域５０ｂも対向するため、可動体５に働く前記吸引力が強くなる。 In addition, in the circuit breaker 1 of the present embodiment, not only the suction side first region 40a of the suction side facing surface 40 and the movable side first region 50a of the movable side facing surface 50 face each other, but also the suction side facing surface 40 , and the movable side second region 50b of the movable side facing surface 50 also face each other, the suction force acting on the movable body 5 becomes stronger.

さらに、本実施形態では、吸引体４の縦幅方向において、連設壁部４２の位置と吸引側第二領域４０ｂの位置にはギャップが生じているが、連設壁部４２と側壁部４１との境目から吸引側第二領域４０ｂまでの間においては、側壁部４１の縦幅を徐々に大きくすることで、磁束が連設壁部４２から吸引側第二領域４０ｂや吸引側第一領域４０ａの上端側に向かって直線的に流れるようにしているため、吸引体４から強い吸引力を発生させることができる。 Furthermore, in the present embodiment, there is a gap between the position of the connecting wall portion 42 and the position of the suction side second region 40b in the longitudinal width direction of the suction body 4, but the connecting wall portion 42 and the side wall portion 41 from the boundary to the attraction-side second region 40b, the vertical width of the side wall portion 41 is gradually increased so that the magnetic flux flows from the connecting wall portion 42 to the attraction-side second region 40b and the attraction-side first region 40b. Since it is made to flow linearly toward the upper end side of 40a, strong attraction|suction force can be generated from the attraction|suction body 4. As shown in FIG.

さらに、吸引体４の回動起点となる回動軸２２０と貫通孔４１０を画定する縁部との間、及び可動体５の回動起点となる軸本体部５２１と軸受部２２１との間には隙間が形成されているため、吸引体４と可動体５とはこの隙間の範囲内で動くことができるようになっている。 Further, between the rotation shaft 220 that serves as the rotation starting point of the suction body 4 and the edge portion that defines the through hole 410, and between the shaft body portion 521 that serves as the rotation starting point of the movable body 5 and the bearing portion 221 Since a gap is formed, the suction body 4 and the movable body 5 can move within the range of this gap.

本実施形態の筐体２は、上述のように２つの分割体を前記横幅方向で付き合わせて接合することによって構成されているため、例えば、製造時に各分割体に形成されている回動軸２２０や軸受部２２１の位置がずれたりしても、前記隙間の範囲内で吸引体４と可動体５の位置や姿勢が合うことによって、正しく動作できるようになる。 Since the housing 2 of the present embodiment is configured by joining two divided bodies together in the width direction as described above, for example, the rotation shaft formed in each divided body at the time of manufacture Even if the positions of 220 and bearing portion 221 are shifted, the positions and postures of attracting body 4 and movable body 5 are matched within the range of the gap, so that they can operate correctly.

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。 It should be noted that the circuit breaker of the present invention is not limited to the above-described embodiments, and of course various modifications can be made without departing from the gist of the present invention.

上記実施形態において、吸引体４は、筐体２の回動軸２２０を貫通孔４１０に挿通することにより、回動可能とな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は、該吸引体４に突設した軸を筐体２、より具体的には、筐体２の内面に挿通することで回動可能となるように構成されていてもよい。 In the above embodiment, the suction body 4 is configured to be rotatable by inserting the rotation shaft 220 of the housing 2 into the through hole 410, but the configuration is not limited to this. For example, the suction body 4 may be configured to be rotatable by inserting a shaft projecting from the suction body 4 into the housing 2, more specifically, through the inner surface of the housing 2. .

上記実施形態において、吸引側対向面４０は、吸引体４全体を傾けることで吸引側接離部４０１を吸引側接触部４００よりも可動体５から離れた場所に配置してもよいし、吸引側対向面４０自体を傾斜した形状にしてもよい。 In the above-described embodiment, the suction-side facing surface 40 may be arranged such that the suction-side contacting/separating portion 401 is located farther from the movable body 5 than the suction-side contact portion 400 by tilting the entire suction body 4 , or The side facing surface 40 itself may have an inclined shape.

上記実施形態において、特に言及しなかったが、吸引側接触部４００と可動側接触部５００とは、点接触又は略点接触していることが好ましい。 Although not specifically mentioned in the above embodiment, the suction-side contact portion 400 and the movable-side contact portion 500 are preferably in point contact or substantially point contact.

上記実施形態において、可動体５は、前記横幅方向において可動体本体部５１の両側から外側に向かって延出する取付部５２を軸受部２２１内に挿入することで、回動可能とな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、可動体５は、側面２２の内面に突設した軸を挿通する構造とすることで回動可能となるように構成されていてもよい。 In the above embodiment, the movable body 5 can be rotated by inserting the mounting portions 52 extending outward from both sides of the movable body body portion 51 in the width direction into the bearing portions 221 . was configured, but is not limited to this configuration. For example, the movable body 5 may be configured to be rotatable by inserting a shaft projecting from the inner surface of the side surface 22 .

上記実施形態において、可動体５の可動体本体部５１は、板状であったが、この構成に限定されない。例えば、可動体５の可動体本体部５１は、柱状や、枠状であってもよい。 In the above-described embodiment, the movable body main body portion 51 of the movable body 5 has a plate shape, but it is not limited to this configuration. For example, the movable body body portion 51 of the movable body 5 may be columnar or frame-shaped.

上記実施形態では、吸引側対向面４０を前記前後方向に対して傾斜させ、可動側対向面５０を前記前後方向に沿って真っすぐに配置していたが、この構成に限定されない。例えば、吸引側対向面４０と可動側対向面５０の両方を前記前後方向に対して傾斜させてもよいし、可動側対向面５０のみを前記前後方向に対して傾斜させてもよい。 In the above-described embodiment, the suction-side facing surface 40 is inclined with respect to the front-rear direction, and the movable-side facing surface 50 is arranged straight along the front-rear direction, but the present invention is not limited to this configuration. For example, both the suction-side facing surface 40 and the movable-side facing surface 50 may be inclined with respect to the front-rear direction, or only the movable-side facing surface 50 may be inclined with respect to the front-rear direction.

上記実施形態の回路遮断器は、
電源側の端子と負荷側の端子とに繋がる回路と、
該回路を開閉する接点部と、
前記回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、且つ前記吸引体に対して前記吸引体側への動き代となる隙間をあけて対向配置される保持状態と、前記吸引体側に動いた状態で、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替可能な可動体と、を備え、
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、
前記吸引側対向面と前記可動側対向面とは、前記可動体が前記保持状態であるときに、一方側で互いに接触する接触部と、他方側で接離可能な隙間を形成するよう互いに離間する接離部と、を有し、
前記可動体は、前記可動側対向面が有する前記接触部よりも前記一方側にずれた位置を回動起点として回動可能であり、且つ回動に伴って前記可動側対向面の前記接離部が前記吸引側対向面の前記接離部に接離するように構成され、
前記吸引体は、前記接触部よりも他方側にずれた位置を回動起点として可動体に対して接離する方向で回動可能に構成され、
前記吸引体を、該吸引体の回動起点よりも前記可動体の回動起点側にずれた位置で前記可動体に向けて付勢する付勢部材を備える。 The circuit breaker of the above embodiment is
a circuit connected to the terminals on the power supply side and the terminals on the load side;
a contact portion that opens and closes the circuit;
an attracting body that becomes an electromagnet by the current flowing through the circuit;
The holding state in which the closed state of the contact portion can be maintained and is arranged opposite to the attracting body with a gap serving as a movement allowance toward the attracting body, and the state in which the contact moves toward the attracting body. a movable body that can be switched to a released state in which the closed state of the contact portion is released and the contact portion can be opened;
The attracting body has an attracting-side facing surface arranged toward the movable body,
The movable body has a movable-side facing surface that faces the suction-side facing surface,
The attraction-side facing surface and the movable-side facing surface are separated from each other so as to form a contact portion that contacts each other on one side and a gap that can be contacted and separated on the other side when the movable body is in the holding state. and a contact/separation portion,
The movable body is rotatable with a position shifted to the one side from the contact portion of the movable-side facing surface as a rotation starting point, and the movable-side facing surface contacts and separates with the rotation. is configured to contact and separate from the contact and separation portion of the suction side facing surface,
The attracting body is configured to be rotatable in a direction of contacting and separating from the movable body with a position shifted to the other side of the contact portion as a rotation starting point,
An urging member is provided that urges the attracting body toward the movable body at a position shifted toward the rotation starting point of the movable body from the turning starting point of the attracting body.

上記構成の回路遮断器によれば、吸引体と可動体とはそれぞれの接触部が互いに接触した状態であり、また、吸引体の回動起点は、該吸引体の接触部から前記他方側（接離部側）にずれた位置に設定されているため、回路に過大電流（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）が流れた際に可動体が吸引体側に回動すると、可動側対向面の接触部が吸引側対向面の接触部を押し操作する。このとき、可動側対向面の接離部は吸引側対向面に向かって動き、且つ吸引側対向面の接離部は可動側対向面に向かって動く。 According to the circuit breaker configured as described above, the contact portions of the attracting body and the movable body are in contact with each other, and the rotation starting point of the attracting body is the other side ( Since it is set at a position shifted to the contact/separation part side), when an excessive current flows through the circuit (that is, a current that generates a magnetic force strong enough to attract the movable body to the attracting body), the movable body will move to the attracting body side. When rotated, the contact portion on the movable side facing surface pushes the contact portion on the suction side facing surface. At this time, the contact and separation portion of the movable side facing surface moves toward the suction side facing surface, and the contact and separation portion of the suction side facing surface moves toward the movable side facing surface.

このように、可動体と吸引体とは、互いの間の隙間を狭めるようにして接近し合うため、可動体が回動し始めた後においては、前記隙間が素早く狭まる。また、前記隙間が狭まり磁気抵抗が小さくなるにつれて吸引力が強くなるため、可動体を吸引体側に引き寄せるための吸引力が素早く高まる。 In this way, the movable body and the attracting body approach each other while narrowing the gap between them, so that the gap narrows quickly after the movable body starts rotating. Further, as the gap narrows and the magnetic resistance decreases, the attractive force increases, so the attractive force for drawing the movable body toward the attracting body quickly increases.

従って、上記構成の回路遮断器は、回路に過大電流が流れたときに可動体が吸引体側に素早く引き寄せられるため、短時間で接点部を開放可能な状態にすることができる。 Therefore, in the circuit breaker having the above configuration, the movable body is quickly drawn toward the attracting body when an excessive current flows through the circuit, so that the contact can be opened in a short period of time.

また、上記実施形態の回路遮断器において、
前記可動側対向面及び前記吸引側対向面は、前記接触部から前記接離部にかけて平面で構成され、
前記吸引側対向面は、前記可動体が前記保持状態であるときに、前記可動側対向面に対して傾斜した姿勢で部分的に接触する、ようにしてもよい。 Further, in the circuit breaker of the above embodiment,
The movable-side facing surface and the suction-side facing surface are flat surfaces extending from the contact portion to the contact/separation portion,
The attraction-side facing surface may partially contact the movable-side facing surface in an inclined posture when the movable body is in the holding state.

かかる構成によれば、可動体が保持状態である場合においては、吸引側対向面と可動側対向面とが部分的に接触した状態で吸引側対向面が可動側対向面に対して傾斜した姿勢となるため、吸引側対向面と可動側対向面との間の隙間は、各接触部側に向かうにつれて狭くなる。これにより、可動側対向面と吸引側対向面の接触部の近傍領域では吸引体と可動体との間の磁気抵抗が小さくなるため、回路に過大電流が流れたときに吸引体と可動体との間には大きな吸引力が発生する。 According to this configuration, when the movable body is in the holding state, the attraction-side facing surface and the movable-side facing surface are in a state in which the attraction-side facing surface and the movable-side facing surface are partially in contact with each other, and the attitude is such that the attraction-side facing surface is inclined with respect to the movable-side facing surface. Therefore, the gap between the suction-side facing surface and the movable-side facing surface becomes narrower toward each contact portion. As a result, the magnetic resistance between the attracting body and the movable body is reduced in the vicinity of the contact portion between the movable-side facing surface and the attracting-side facing surface. A large attractive force is generated between

１…回路遮断器、２…筐体、３…回路、４…吸引体、５…可動体、６…接触用付勢部材、７…操作機構、２０…正面、２１…背面、２２…側面、３０…入力端子、３１…接点部、４０…吸引側対向面、４１…側壁部、４２…連設壁部、５０…可動側対向面、５１…可動体本体部、５２…取付部、５３…掛止保持部、７０…操作部、７１…切替構造、２２０…回動軸、２２１…軸受部、３１０…固定側端子、３１１…可動側端子、４００…吸引側接触部、４１０…貫通孔、５００…可動側接触部、５０１…可動側接離部、７００…ベース部、７０１…レバー部、７１０…切替部材、７１１…開放用付勢部材、７１２…作動構造、７１２ａ…リンク部材、７１２ａａ…操作部側軸部、７１２ａｂ…押込部側軸部、７１２ｂ…押込部材、７１２ｂａ…ベース部、７１２ｂｂ…差込片部、７１２ｂｃ…押込片部 DESCRIPTION OF SYMBOLS 1... Circuit breaker, 2... Housing, 3... Circuit, 4... Attracting body, 5... Movable body, 6... Contact biasing member, 7... Operation mechanism, 20... Front, 21... Back, 22... Side, DESCRIPTION OF SYMBOLS 30... Input terminal 31... Contact part 40... Suction side opposing surface 41... Side wall part 42... Continuous wall part 50... Movable side opposing surface 51... Movable body main part 52... Mounting part 53... Latch holding portion 70 Operation portion 71 Switching structure 220 Rotating shaft 221 Bearing portion 310 Fixed side terminal 311 Movable side terminal 400 Suction side contact portion 410 Through hole 500... Movable side contact portion 501... Movable side contact/separation portion 700... Base portion 701... Lever portion 710... Switching member 711... Biasing member for opening 712... Operation structure 712a... Link member 712aa... Operating portion side shaft portion 712ab... Pushing portion side shaft portion 712b... Pushing member 712ba... Base portion 712bb... Insertion piece portion 712bc... Pushing piece portion

Claims

a circuit connected to the terminals on the power supply side and the terminals on the load side;
a contact portion that opens and closes the circuit;
an attracting body that becomes an electromagnet by the current flowing through the circuit;
The holding state in which the closed state of the contact portion can be maintained and is arranged opposite to the attracting body with a gap serving as a movement allowance toward the attracting body, and the state in which the contact moves toward the attracting body. a flat plate-like movable body that can be switched to a released state in which the closed state of the contact portion is released and the contact portion can be opened;
a biasing member that biases the attracting body toward the movable body;
and an operation mechanism capable of opening and closing the contact portion ,
The suction body is formed in a U-shape by a continuous wall portion arranged toward the movable body and a pair of side wall portions provided on the continuous wall portion, and is arranged toward the movable body. has a suction side facing surface that
the movable body has a movable-side facing surface arranged to face the suction-side facing surface,
The suction-side facing surface and the movable-side facing surface form a gap that allows contact and separation in the direction in which the suction-side facing surface and the movable-side facing surface face each other when the movable body is in the holding state. having contacting and separating portions spaced apart from each other to form
the movable body and the attracting body are rotatable about separate axes extending along the width direction orthogonal to the facing direction;
the axis of the rotation center of the movable body and the axis of the rotation center of the attracting body are spaced apart in a front-rear direction orthogonal to the facing direction and the lateral width direction,
The operating mechanism has an insertion piece that is engaged with the movable part in a state in which the contact part is in the closed state and the movable body is switched to the holding state,
As the movable portion in the held state moves toward the attracting body and switches to the released state, the latching state of the insertion piece portion with respect to the movable portion is released, and the contact portion changes from the closed state to the open state. configured to switch to
circuit breaker.

The biasing member is configured to bias the end of the movable body of the attracting body on the rotation center side,
A circuit breaker according to claim 1.