JP4908139B2

JP4908139B2 - Circuit breaker

Info

Publication number: JP4908139B2
Application number: JP2006274424A
Authority: JP
Inventors: 裕明加藤
Original assignee: 河村電器産業株式会社
Priority date: 2006-10-05
Filing date: 2006-10-05
Publication date: 2012-04-04
Anticipated expiration: 2026-10-05
Also published as: JP2008097834A

Description

本発明は、たとえば分電盤内等に設置される回路遮断器に関するものである。 The present invention relates to a circuit breaker installed in a distribution board, for example.

回路遮断器としては、遮断対象の電路に流れる電流が定格値を超えると電路を遮断する過電流遮断機能を備えたもの、電路に漏電が発生するとそれを検出して遮断動作する漏電遮断機能を備えたもの、過電流遮断機能及び漏電遮断機能の両機能を備えたもの等がある。このような回路遮断器において、従来、負荷側端子は、複数（たとえば単相３線式タイプのものでは３つ）の端子を水平方向へ並設して形成されていた。そして、電路に設けられた接点を開閉操作する接点操作部材を強制的に開動作させる開閉機構部は、左右方向へ長く伸びる腕部を有するＴ字状の引き外し部材を、操作ハンドルの回動操作に応じて引き外し動作するように、Ｌ字状又はコ字状のフレームに軸支して構成していた（たとえば、特許文献１）。 The circuit breaker has an overcurrent cutoff function that shuts off the electrical circuit when the current flowing through the circuit to be interrupted exceeds the rated value, and has a leakage breaker function that detects and detects the occurrence of a leakage in the circuit. Provided, and those provided with both functions of an overcurrent interruption function and an earth leakage interruption function. In such a circuit breaker, conventionally, the load side terminal has been formed by arranging a plurality of terminals (for example, three for a single-phase three-wire type) in parallel in the horizontal direction. The opening / closing mechanism that forcibly opens the contact operating member that opens and closes the contact provided on the electric circuit has a T-shaped tripping member that has an arm portion that extends in the left-right direction. It is configured to be pivotally supported on an L-shaped or U-shaped frame so as to be pulled out in accordance with the operation (for example, Patent Document 1).

特開２０００−３２３００５号公報JP 2000-32005 A

近年、回路遮断器の小型化・薄型化が求められている。しかしながら、従来の回路遮断器は、水平方向へ複数の端子を並設して負荷側端子を形成していたため、薄型化に限度があり、負荷側端子の構成の変更が望まれている。また、回路遮断器を薄型化するにあたり、開閉機構部に係る構成も、特許文献１に開示されているようなＴ字状の引き外し部材やＬ字状又はコ字状のフレームを用いた構成から変更した方が望ましい。 In recent years, circuit breakers have been required to be smaller and thinner. However, the conventional circuit breaker has a load-side terminal formed by arranging a plurality of terminals in parallel in the horizontal direction, so there is a limit to reducing the thickness, and a change in the configuration of the load-side terminal is desired. Further, when the circuit breaker is thinned, the structure related to the opening / closing mechanism is also configured using a T-shaped tripping member or an L-shaped or U-shaped frame as disclosed in Patent Document 1. It is desirable to change from

そこで、本発明は、上記課題に鑑みなされたものであって、負荷側端子や開閉機構部の構成を従来にない新規な構成として、薄型化の要求に応えることができる回路遮断器を提供しようとするものである。 Accordingly, the present invention has been made in view of the above-described problems, and provides a circuit breaker that can meet the demand for a reduction in thickness by using a load-side terminal and an opening / closing mechanism as a novel structure that has not been conventionally used. It is what.

上記目的を達成するために、本発明のうち請求項１に記載の発明は、遮断器ケースの背面に電源側端子、前面に負荷側端子が夫々上下方向に配設され、前記遮断器ケース内に、前記電源側端子と前記負荷側端子との間の電路に設けられた固定接点と可動接点とからなる開閉接点部と、前記開閉接点部を開動作させるための接点操作部材と、ラッチ機構を備えて漏電、過電流、又は短絡等の電路異常が発生したらラッチを解除し、前記接点操作部材を所定方向へ付勢移動させて前記開閉接点部を開動作させる開閉機構部とを備えた回路遮断器であって、前記遮断器ケース内に、前記電路異常を検知する異常検知回路が組み込まれた電気回路基板を前記遮断器ケース側面に平行となる起立状態で設置する一方、前記開閉機構部と前記接点操作部材とを一体化するとともに、前記接点操作部材の付勢移動に伴い、前記開閉機構部の少なくとも一部が、側面視で前記電気回路基板と重ならない第一位置から、前記電気回路基板と前記遮断器ケースの側面との隙間であって側面視で前記電気回路基板と重なる第二位置へ移動するように前記接点操作部材及び開閉機構部を設置したことを特徴とする。
また、請求項２に記載の発明は、請求項１に記載の発明において、開閉機構部のラッチ機構を、左右方向を軸として回動可能に軸支された板状の第一カム部材と、前記第一カム部材の一部が係止可能な係止部を有し、左右方向を軸として回動可能に軸支された板状の第二カム部材と、一端が前記第一カム部材に突設された第一係合突部に、他端が前記第一係合突部と同方向へ突設された第二係合突部に夫々係合し、両カム部材を係止方向へ付勢してラッチ状態とするバネ部材とで形成したことを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, a power supply side terminal is disposed on the back of the circuit breaker case and a load side terminal is disposed on the front surface in the vertical direction. the front Stories and closing contact portion comprising a fixed contact and a movable contact provided in the electric path between the power source side terminal and the load terminal, the contact operating member for opening operation of the switching contact portion, the latch And an opening / closing mechanism that releases the latch when an electric circuit abnormality such as leakage, overcurrent, or short circuit occurs and opens the switching contact by urging and moving the contact operating member in a predetermined direction. An electric circuit board in which an abnormality detection circuit for detecting the electric circuit abnormality is installed in an upright state parallel to the side surface of the circuit breaker case. Mechanism unit and contact operation member As well as integrated, with the urging movement of said contact operating member, at least a portion of said opening and closing mechanism portion, from a first position which does not overlap with the electric circuit board in a side view, the breaker and the electrical circuit board The contact operation member and the opening / closing mechanism are installed so as to move to a second position that is a gap with the side surface of the case and overlaps the electric circuit board in a side view .
According to a second aspect of the present invention, in the first aspect of the present invention, the latch mechanism of the opening and closing mechanism portion is a plate-like first cam member that is pivotally supported about the left-right direction; A part of the first cam member has a latching portion that can be latched, and is supported by a plate-like second cam member that is pivotally supported about the left-right direction, and one end of the first cam member is attached to the first cam member The projecting first engaging projecting part is engaged with the second engaging projecting part projecting in the same direction as the first engaging projecting part, and both cam members are engaged in the locking direction. It is formed by a spring member that is biased to be in a latched state.

本発明によれば、遮断器ケースの背面に電源側端子、前面に負荷側端子を夫々上下方向に配設し、開閉機構部により接点操作部材を所定方向へ付勢移動させて開閉接点部を開動作させるようにしている。したがって、負荷側端子を水平方向に並設していたような従来の回路遮断器と比較すると、回路遮断器を小型化・薄型化することができる。
また、遮断器ケース内に、電路異常を検知する異常検知回路が組み込まれた電気回路基板を遮断器ケース側面に平行となる起立状態で設置する一方、開閉機構部と接点操作部材とを一体化するとともに、接点操作部材の付勢移動に伴い、開閉機構部の少なくとも一部が、側面視で電気回路基板と重ならない第一位置から、電気回路基板と遮断器ケースの側面との隙間であって側面視で電気回路基板と重なる第二位置へ移動するように接点操作部材及び開閉機構部を設置している。したがって、遮断器ケース内の空間の有効利用を図ることができ、開閉機構部を遮断器ケース内で移動可能としているにも拘わらず、遮断器ケースの小型化を実現することができる。
さらに、請求項２に記載の発明によれば、開閉機構部を、左右方向を軸として回動可能に軸支された板状の第一カム部材と、第一カム部材の一部が係止可能な係止部を有し、左右方向を軸として回動可能に軸支された板状の第二カム部材と、一端が第一カム部材に突設された第一係合突部に、他端が第一係合突部と同方向へ突設された第二係合突部に夫々係合し、両カム部材を係止方向へ付勢してラッチ状態とするバネ部材とで形成している。したがって、Ｔ字状の引き外し部材を腕部が左右方向へ伸びるような姿勢で設置していた従来のものと比較して、開閉機構部を小型化することが可能で、ひいては回路遮断器を小型化・薄型化することができる。
加えて、上述の如く、一つのバネ部材により二つのカム部材の係止状態を維持してラッチ状態とするようにしているため、部品点数を削減することができ、回路遮断器を一層小型化することができる。加えて、バネ部材により、遮断動作に伴って第一カム部材と第二カム部材とのラッチ状態が一旦解除されたとしても、両カム部材を自動的にラッチ状態へと復帰させるようになっており、使い勝手が良い。 According to the present invention, the power supply side terminal is disposed on the back surface of the circuit breaker case, and the load side terminal is disposed on the front surface in the vertical direction. I try to open it. Therefore, the circuit breaker can be reduced in size and thickness as compared with the conventional circuit breaker in which the load side terminals are arranged in parallel in the horizontal direction.
In addition, an electrical circuit board with an abnormality detection circuit that detects an electrical circuit abnormality is installed in the circuit breaker case in an upright state parallel to the side of the circuit breaker case, while the switching mechanism and contact operating member are integrated. In addition, as the contact operating member is urged , at least a part of the opening / closing mechanism portion is a gap between the electric circuit board and the side surface of the circuit breaker case from the first position where it does not overlap the electric circuit board in a side view. The contact operating member and the opening / closing mechanism are installed so as to move to a second position overlapping the electric circuit board in a side view . Therefore, the space in the circuit breaker case can be effectively used, and the circuit breaker case can be downsized despite the fact that the switching mechanism can be moved in the circuit breaker case.
According to the second aspect of the present invention, the opening / closing mechanism is locked to a plate-like first cam member pivotally supported about the left-right direction and a part of the first cam member. A plate-like second cam member that has a possible locking part and is pivotally supported about the left-right direction as an axis, and a first engagement protrusion that has one end protruding from the first cam member, The other end is formed by a spring member that engages with a second engagement protrusion that protrudes in the same direction as the first engagement protrusion, and biases both cam members in the locking direction to bring them into a latched state. is doing. Therefore, it is possible to reduce the size of the opening / closing mechanism compared to the conventional one in which the T-shaped tripping member is installed in such a posture that the arm portion extends in the left-right direction. It can be made smaller and thinner.
In addition, as described above, the locking state of the two cam members is maintained by the single spring member so as to be in the latched state, so the number of parts can be reduced and the circuit breaker can be further downsized. can do. In addition, even if the latched state of the first cam member and the second cam member is once released by the spring operation by the spring member, both the cam members are automatically returned to the latched state. Easy to use.

以下、本発明の一実施形態となる回路遮断器について、図面をもとに説明する。 Hereinafter, a circuit breaker according to an embodiment of the present invention will be described with reference to the drawings.

図１は、回路遮断器１の外観を示した斜視説明図であり、図２は、遮断器ケース４の右側を外して回路遮断器１の内部機構を示した斜視説明図である。尚、本実施形態においては、回路遮断器１の負荷側端子３側を、回路遮断器１の前側として説明する。
回路遮断器１は、単相３線式電路に使用するものであって、一対の左右ケース部材を組み立ててなる合成樹脂製の遮断器ケース４（たとえば、左右幅１０ｍｍ程度）内に、漏電発生を検出するための漏電検出回路やＯＮ操作されると疑似漏電が発生するテスト回路等が組み込まれたプリント基板（異常検知手段）２０、主電路をＯＮ／ＯＦＦ操作するために固定接点１１ａ、１１ａ・・（図３に示す）に対して可動接点２３ａ、２３ａ・・（図３に示す）を接続／解離させるセパレータ（接点操作部材）２１、漏電を検知する零相変流器（異常検知手段）４１、漏電発生をうけてセパレータ２１を解離方向へ摺動させるべく動作するトリップコイル８等が設置されている。 FIG. 1 is an explanatory perspective view showing an appearance of the circuit breaker 1, and FIG. 2 is an explanatory perspective view showing an internal mechanism of the circuit breaker 1 by removing the right side of the circuit breaker case 4. In the present embodiment, the load side terminal 3 side of the circuit breaker 1 is described as the front side of the circuit breaker 1.
The circuit breaker 1 is used for a single-phase three-wire electric circuit, and an electric leakage is generated in a circuit breaker case 4 made of synthetic resin (for example, about 10 mm in the left and right width) formed by assembling a pair of left and right case members. A printed circuit board (abnormality detection means) 20 incorporating a leakage detection circuit for detecting a fault, a test circuit that generates a pseudo leakage when operated ON, and fixed contacts 11a, 11a for ON / OFF operation of the main circuit・・ Separator (contact operating member) 21 for connecting / disconnecting movable contacts 23a, 23a (shown in FIG. 3) to / from (shown in FIG. 3), zero-phase current transformer (abnormality detecting means) for detecting electric leakage 41) A trip coil 8 or the like that is operated to cause the separator 21 to slide in the dissociating direction after the occurrence of electric leakage is installed.

また、遮断器ケース４の後部には、３つの端子Ｐ１、Ｐ２、Ｐ３を上下一列に配列してなる電源側端子２が配置されている。該電源側端子２では、上部端子Ｐ１が中性極端子、中央端子Ｐ２及び下部端子Ｐ３が電圧極端子となっている。そして、各端子Ｐ１〜Ｐ３は、コ字状の端子金具１３を有しており、分電盤内等に配設された導体バー（図示せず）を挿入するだけで接続可能なプラグイン方式の端子として形成されている。尚、各端子Ｐ１〜Ｐ３の近傍には、過電流発生時に遮断動作するバイメタル片４２、４２、短絡電流発生時に遮断動作する可動電磁片４３、４３等が設置されている。 Further, a power supply side terminal 2 formed by arranging three terminals P1, P2, and P3 in a vertical line is arranged at the rear part of the circuit breaker case 4. In the power supply side terminal 2, the upper terminal P1 is a neutral electrode terminal, and the center terminal P2 and the lower terminal P3 are voltage electrode terminals. And each terminal P1-P3 has the U-shaped terminal metal fitting 13, and it is a plug-in system which can be connected only by inserting the conductor bar (not shown) arrange | positioned in the distribution board etc. It is formed as a terminal. In the vicinity of each of the terminals P1 to P3, bimetal pieces 42 and 42 that perform a cutoff operation when an overcurrent is generated, and movable electromagnetic pieces 43 and 43 that perform a cutoff operation when a short-circuit current is generated, are installed.

さらに、遮断器ケース４の前面は、前方へと下降する傾斜面となっており、該傾斜面には、図示しない負荷配線を挿入接続可能な３つの端子Ｌ１、Ｌ２、Ｌ３からなる負荷側端子３が配置されている。端子Ｌ１〜Ｌ３は、傾斜面上で、電源側端子２の端子Ｐ１〜Ｐ３と平面視一直線上となるように上下方向へ一列に配設されており、中央端子Ｌ２が中性極端子、上部端子Ｌ１及び下部端子Ｌ３が電圧極端子となっている。各端子Ｌ１〜Ｌ３は、後端部に主電路の開閉接点部を構成する固定接点１１ａが設けられた固定金具１１と、負荷配線の電線部を係止可能な係止金具（図示せず）とを有しており、負荷配線の電線部を、端子孔１２を介して挿入するだけで接続可能な速結端子として形成されている。尚、１４は、固定金具１１を支持する支持ホルダーであり、１６は、使用しない端子の端子孔１２を閉塞するために遮断器ケース４の前面に移動可能に設けられた端子カバーである。また、１７は、負荷側端子３に挿入接続されている負荷配線を抜き取る際に、係止金具による係止を解除するための解除レバーである。 Further, the front surface of the circuit breaker case 4 has an inclined surface that descends forward, and on the inclined surface, a load side terminal comprising three terminals L1, L2, and L3 into which load wiring (not shown) can be inserted and connected. 3 is arranged. The terminals L1 to L3 are arranged in a line in the vertical direction so as to be in line with the terminals P1 to P3 of the power supply side terminal 2 on the inclined surface, and the central terminal L2 is a neutral electrode terminal and an upper part The terminal L1 and the lower terminal L3 are voltage electrode terminals. Each of the terminals L1 to L3 includes a fixing bracket 11 provided with a fixed contact 11a constituting a switching contact portion of the main electric circuit at the rear end portion, and a locking bracket (not shown) capable of locking the electric wire portion of the load wiring. And is formed as a quick-connect terminal that can be connected by simply inserting the electric wire portion of the load wiring through the terminal hole 12. Reference numeral 14 denotes a support holder that supports the fixing bracket 11, and 16 denotes a terminal cover that is movably provided on the front surface of the circuit breaker case 4 in order to close the terminal holes 12 of terminals that are not used. Reference numeral 17 denotes a release lever for releasing the locking by the locking metal fitting when the load wiring inserted and connected to the load side terminal 3 is extracted.

さらにまた、遮断器ケース４の上面には、前後方向への回動操作により、後述するセパレータ２１を動作させて主電路をＯＮ／ＯＦＦする操作ハンドル５が設置されている。該操作ハンドル５は、主電路をＯＮ操作する場合、図２等に示す如く、遮断器ケース４の上面と略平行になる角度まで傾倒する一方、主電路をＯＦＦ操作する場合、図５に示す如く、遮断器ケース４上面から上方へ突出した状態となる。 Furthermore, an operation handle 5 is installed on the upper surface of the circuit breaker case 4 to operate a separator 21 described later by turning operation in the front-rear direction to turn on / off the main electric circuit. The operation handle 5 is tilted to an angle substantially parallel to the upper surface of the circuit breaker case 4 when the main electric circuit is turned on, as shown in FIG. 2, and the like. Thus, it will be in the state which protruded upwards from the upper surface of the circuit breaker case 4. FIG.

加えて、遮断器ケース４内の上部には、漏電検出回路やテスト回路等が組み込まれたプリント基板２０が垂直方向へ起立させた状態で設置されているとともに、漏電検出時等に回路遮断器１が正常に動作するか否かをテストするためのテストボタン６や、上記プリント基板２０から突設された突起状接点１９と、一端がプリント基板２０と電気的に接続され、他端５１ａが突起状接点１９の側面と接触可能に配置された略Ｕ字状のピン状接点部材５１とからなるスイッチ部等が設けられている。尚、５２は、後述する開閉機構部３１の右側面に突設された突起であって、主電路を遮断した際には、セパレータ２１の遮断方向への摺動に伴い、ピン状接点５１を上方へ押し上げて突起状接点１９との接触を禁止（すなわち、テスト回路のＯＮ操作を禁止）するようになっている。 In addition, in the upper part of the circuit breaker case 4, a printed circuit board 20 in which a leakage detection circuit, a test circuit and the like are incorporated is installed in a vertical state, and a circuit breaker is detected when leakage is detected. A test button 6 for testing whether or not 1 operates normally, a protruding contact 19 projecting from the printed circuit board 20, one end electrically connected to the printed circuit board 20, and the other end 51a A switch portion or the like including a substantially U-shaped pin-shaped contact member 51 disposed so as to be in contact with the side surface of the protruding contact 19 is provided. Reference numeral 52 denotes a protrusion projecting on the right side surface of the opening / closing mechanism 31 to be described later. When the main electric circuit is interrupted, the pin-shaped contact 51 is moved along with the sliding of the separator 21 in the interrupting direction. It is pushed upward to prohibit contact with the protruding contact 19 (that is, prohibiting ON operation of the test circuit).

次に、上記操作ハンドル５の操作により動作するセパレータ２１及び漏電発生等をうけてセパレータ２１を遮断動作させる開閉機構部３１について、図３〜６をもとに説明する。図３は、セパレータ２１及び主電路の開閉接点部を示した斜視説明図である。また、図４（ａ）は回路遮断器１のセパレータ２１及び開閉機構部３１内部が表れる側断面を示した断面説明図であり、図４（ｂ）は図４（ａ）における開閉機構部３１を拡大して示した拡大説明図である。さらに、図５は主電路を遮断した状態の回路遮断器１を示した斜視説明図であり、図６（ａ）は主電路が遮断された状態における回路遮断器１のセパレータ２１及び開閉機構部３１内部が表れる側断面を示した断面説明図、図６（ｂ）は図６（ａ）における開閉機構部３１を拡大して示した拡大説明図である。 Next, the separator 21 that is operated by operating the operation handle 5 and the opening / closing mechanism 31 that shuts off the separator 21 in response to occurrence of electric leakage will be described with reference to FIGS. FIG. 3 is an explanatory perspective view showing the separator 21 and the switching contact portion of the main electric circuit. FIG. 4A is a cross-sectional explanatory view showing a side cross section showing the inside of the separator 21 and the opening / closing mechanism 31 of the circuit breaker 1, and FIG. 4B is an opening / closing mechanism 31 in FIG. 4A. It is the expansion explanatory drawing which expanded and showed. 5 is a perspective explanatory view showing the circuit breaker 1 in a state where the main electric circuit is cut off, and FIG. 6A is a separator 21 and an opening / closing mechanism portion of the circuit breaker 1 in a state where the main electric circuit is cut off. FIG. 6B is an enlarged explanatory view showing the opening / closing mechanism 31 in FIG. 6A in an enlarged manner.

セパレータ２１は、合成樹脂からなる筒状体に形成されたものであって、負荷側端子３の後方で端子Ｌ１〜Ｌ３の配置に平行、すなわち遮断器ケース４前面の傾斜と平行に設置されており、操作ハンドル５の回動操作に応じて、傾斜に平行な上下方向へ摺動可能となっている。セパレータ２１の前面には、上下方向に３つの開口が並設されており、該開口は、固定金具１１の後端部（すなわち、固定接点１１ａ設置部）をセパレータ２１内部へ差し込み可能とする差込孔２２となっている。各差込孔２２は、上下方向に所定の幅をもって開設されており（尚、最下方の差込孔２２は切り欠きとなっている）、セパレータ２１は、差込孔２２を介して固定金具１１が内部へ差し込まれた状態のまま上下方向へ摺動可能となっている。 The separator 21 is formed in a cylindrical body made of synthetic resin, and is installed behind the load side terminal 3 in parallel with the arrangement of the terminals L1 to L3, that is, in parallel with the inclination of the front surface of the circuit breaker case 4. In accordance with the turning operation of the operation handle 5, it can slide in the vertical direction parallel to the inclination. On the front surface of the separator 21, three openings are arranged in the vertical direction. The openings allow the rear end portion (that is, the fixed contact 11 a installation portion) of the fixture 11 to be inserted into the separator 21. The hole 22 is formed. Each insertion hole 22 is opened with a predetermined width in the vertical direction (note that the lowermost insertion hole 22 is a notch), and the separator 21 is fixed to the fixing metal via the insertion hole 22. 11 can slide into left vertical state of being inserted into the interior.

また、セパレータ２１の後面にも、上下方向に３つの開口が並設されており、該開口は、可動接点２３ａを有する可動金具２３をセパレータ２１に取り付けるための取付孔２４となっている。さらに、各取付孔２４内のセパレータ２１の内側壁面には、対向する一対を一組とする凹溝２５、２５が刻設されている。各凹溝２５は、差込孔２２と取付孔２４とに亘って刻設されており、該凹溝２５の前後方向での略中間位置には、後側（取付孔２４側）が高くなるクランク形状の段部（図示せず）が設けられている。そして、該凹溝２５、２５を利用して、下記の可動金具２３がセパレータ２１に取り付けられる。尚、セパレータ２１の後面には、セパレータを遮断方向（上方）へ付勢する遮断バネ３２が当接する突片３０が設けられている。 In addition, three openings are arranged in the vertical direction on the rear surface of the separator 21, and the openings serve as attachment holes 24 for attaching the movable fitting 23 having the movable contact 23 a to the separator 21. Further, on the inner wall surface of the separator 21 in each mounting hole 24, concave grooves 25, 25 that form a pair of opposed pairs are engraved. Each concave groove 25 is engraved across the insertion hole 22 and the mounting hole 24, and the rear side (the mounting hole 24 side) becomes higher at a substantially intermediate position in the front-rear direction of the concave groove 25. A crank-shaped step (not shown) is provided. Then, the following movable fitting 23 is attached to the separator 21 using the concave grooves 25, 25. On the rear surface of the separator 21, a projecting piece 30 is provided on which a blocking spring 32 that urges the separator in the blocking direction (upward) abuts.

可動金具２３は、後部が上方又は下方へ折り曲げられてなる側断面Ｌ字状の板状部材であって、上方又は下方へ折り曲げられた後部は取付孔２４よりも幅広に形成されており、セパレータ２１への取付時にセパレータ２１の背面に当接してストッパとなるように構成されている。また、可動金具２３の前端部には、主電路の開閉接点部を構成する可動接点２３ａが設けられているとともに、該可動接点２３ａ設置位置の左右側縁部を夫々左右外方へ突出させてなる凸部２７、２７が設けられている。 The movable metal fitting 23 is a plate-like member having an L-shaped side cross section whose rear portion is bent upward or downward, and the rear portion bent upward or downward is formed wider than the mounting hole 24. At the time of attachment to 21, it is configured to abut against the back surface of the separator 21 and serve as a stopper. In addition, a movable contact 23a constituting an opening / closing contact portion of the main electric circuit is provided at the front end portion of the movable metal fitting 23, and left and right side edge portions of the movable contact 23a installation position are protruded outward in the left and right directions, respectively. Convex portions 27, 27 are provided.

このような構成を有する可動金具２３は、凸部２７、２７を、取付孔２４側から凹溝２５、２５へ嵌合させて前方へスライドさせ、凹溝２５に設けられた段部へ係止させることにより、可動接点２３ａをセパレータ２１内部へ位置させた状態でセパレータ２１に取り付けられる。尚、可動金具２３をセパレータ２１に取り付けるにあたり、セパレータ２１内部で可動接点２３ａを下方（接触方向）へ付勢する押圧バネ２８が、セパレータ２１内における各可動接点２３ａ設置部上方位置に設置される。そして、該押圧バネ２８の付勢力を利用して、可動接点２３ａと固定接点１１ａとの接点圧を出し、両接点の接触状態を安定させるとともに、上記凸部２７、２７の段部への係止状態をより強固なものとしている。 In the movable metal fitting 23 having such a configuration, the convex portions 27, 27 are fitted to the concave grooves 25, 25 from the mounting hole 24 side and slid forward, and are locked to the step portions provided in the concave grooves 25. As a result, the movable contact 23a is attached to the separator 21 in a state where the movable contact 23a is positioned inside the separator 21. In attaching the movable metal fitting 23 to the separator 21, a pressing spring 28 that urges the movable contact 23 a downward (in the contact direction) inside the separator 21 is installed above each movable contact 23 a installation portion in the separator 21. . Then, using the biasing force of the pressing spring 28, the contact pressure between the movable contact 23a and the fixed contact 11a is generated to stabilize the contact state of both contacts, and the protrusions 27 and 27 are engaged with the stepped portions. The stopping state is made stronger.

一方、セパレータ２１の上部には、本発明の要部となる開閉機構部３１が一体的に設けられている。以下、開閉機構部３１について説明する。
開閉機構部３１は、第一カム部材３３と、第二カム部材３４と、捻りバネ３６とからラッチ機構を構成してなるものであり、操作ハンドル５の近傍に位置している。第一カム部材３３は、当接片３３ａ、係止片３３ｂ、及び表面から垂設された係合突起（第一係合突部）３３ｃを有する突片の３つの突片が径方向へ突設されてなる円板状部材であり、遮断器ケース４の側面と平行に設けられ、当接片３３ａをセパレータ２１から後方へ突出させた姿勢で、セパレータ２１の上面から更に上方へ突設された一対の壁面間に遮断器ケース４の左右方向と平行な軸部３３ｄを中心として回動可能に取り付けられている。また、第二カム部材３４は、押さえ爪部３４ａと係止段部３４ｂとを有する板状部材であり、遮断器ケース４の側面と平行に設置され、押さえ爪部３４ａを開閉機構部３１の下方に位置するセパレータ２１の上面側へ向けた姿勢で、且つ、係止段部３４ｂに第一カム部材３３の係止片３３ｂを係止させた状態で、第一カム部材３３同様、壁面間に遮断器ケース４の左右方向と平行な軸部３４ｄを中心として回動可能に取り付けられている。さらに、第二カム部材３４には、係合壁（第二係合突部）３４ｃが本体表面から第一カム部材３３の係合突起３３ｃと同方向へ突設されており、捻りバネ（バネ部材）３６が、その一端を該係合壁３４ｃに、他端を係合突起３３ｃに夫々係合させた状態で第二カム部材３４の軸部３４ｄに取り付けられている。 On the other hand, an opening / closing mechanism 31 as an essential part of the present invention is integrally provided on the upper portion of the separator 21. Hereinafter, the opening / closing mechanism 31 will be described.
The opening / closing mechanism 31 is configured by a latch mechanism including the first cam member 33, the second cam member 34, and the torsion spring 36, and is positioned in the vicinity of the operation handle 5. The first cam member 33 has three projecting pieces including a contact piece 33a, a locking piece 33b, and an engaging protrusion (first engaging protrusion) 33c suspended from the surface projecting in the radial direction. It is a disc-shaped member that is provided, is provided in parallel with the side surface of the circuit breaker case 4, and protrudes further upward from the upper surface of the separator 21 in a posture in which the contact piece 33 a protrudes backward from the separator 21. Between the pair of wall surfaces, the breaker case 4 is attached so as to be rotatable about a shaft portion 33d parallel to the left-right direction. The second cam member 34 is a plate-like member having a pressing claw portion 34 a and a locking step portion 34 b and is installed in parallel with the side surface of the circuit breaker case 4, so that the pressing claw portion 34 a is connected to the opening / closing mechanism portion 31. Like the first cam member 33, the posture is directed toward the upper surface side of the separator 21 positioned below and the locking step 33 b is engaged with the locking piece 33 b of the first cam member 33. The circuit breaker case 4 is attached so as to be rotatable about a shaft part 34d parallel to the left-right direction. Further, the second cam member 34 has an engagement wall (second engagement protrusion) 34c protruding from the main body surface in the same direction as the engagement protrusion 33c of the first cam member 33, and a torsion spring (spring) Member) 36 is attached to the shaft portion 34d of the second cam member 34 with one end engaged with the engagement wall 34c and the other end engaged with the engagement protrusion 33c.

また、開閉機構部３１の後方位置には、トリップコイル８の動作等により瞬間的に上下方向へ摺動する引き外し部材３５が設置されている。該引き外し部材３５は、上方への移動に際して、その先端が第一カム部材３３の当接片３３ａに下方から当接し、更に捻りバネ３６の付勢力に抗して係止片３３ｂと係止段部３４ｂとの係止状態を解除するまで当接片３３ａを押し上げるように設けられている。尚、引き外し部材３５は、バイメタル片４２や可動電磁片４３の動作を受けても瞬間的に上下方向へ摺動するようになっている。 In addition, a tripping member 35 that is instantaneously slid up and down by the operation of the trip coil 8 or the like is installed at a position behind the opening / closing mechanism 31. When the tripping member 35 moves upward, its tip abuts against the contact piece 33a of the first cam member 33 from below, and further engages with the engagement piece 33b against the urging force of the torsion spring 36. The contact piece 33a is pushed up until it is released from the locked state with the stepped portion 34b. The tripping member 35 instantaneously slides up and down even when subjected to the operation of the bimetal piece 42 and the movable electromagnetic piece 43.

以下、開閉機構部３１の動作について説明する。
上述の如く構成される開閉機構部３１では、捻りバネ３６により、両カム部材３３、３４が夫々係止方向へ付勢され（第一カム部材３３は右回り方向へ、第二カム部材３４は左回り方向へ夫々付勢され）て、係止片３３ｂと係止段部３４ｂとの係止状態が維持され、第二カム部材３４の回動が阻止されたラッチ状態となっている。したがって、操作ハンドル５に回動自在に連結され、セパレータ２１上面に当接してセパレータ２１を下方へ押し付けるリンク部材３７をラッチ状態にある第二カム部材３４の押さえ爪部３４ａの先端により押さえ付けることで、セパレータ２１を遮断バネ３２の付勢力に抗する通電位置にて維持している。そして、この通電位置にあっては、各差込孔２２を介して差し込まれた固定接点１１ａと可動接点２３ａとが接触しており、主電路は通電可能な状態となっている。 Hereinafter, the operation of the opening / closing mechanism 31 will be described.
In the opening / closing mechanism 31 configured as described above, the cam members 33 and 34 are urged in the locking direction by the torsion spring 36 (the first cam member 33 is clockwise and the second cam member 34 is The latching state is maintained between the locking piece 33b and the locking step portion 34b, and the second cam member 34 is prevented from rotating. Accordingly, the link member 37 that is rotatably connected to the operation handle 5 and abuts on the upper surface of the separator 21 and presses the separator 21 downward is pressed by the tip of the pressing claw portion 34a of the second cam member 34 in the latched state. Thus, the separator 21 is maintained at an energization position that resists the urging force of the cutoff spring 32. And in this energization position, the fixed contact 11a inserted through each insertion hole 22 and the movable contact 23a are in contact, and the main electric circuit is in a state in which energization is possible.

ここで、漏電や過電流等の発生を受けて引き外し部材３５が瞬間的に上下方向へ摺動すると、上述の如くして開閉機構部３１におけるラッチ状態が解除されるため、第二カム部材３４が軸部３４ｄを中心として回動し、押さえ爪部３４ａの先端によるリンク部材３７の押さえ付け動作も解除となる。したがって、遮断バネ３２の付勢力により、セパレータ２１が開閉機構部３１とともに上方へ摺動し（図５及び６）、固定接点１１ａと可動接点２３ａとが解離して、主電路が遮断されることになる。また、該遮断時におけるセパレータ２１の摺動により、開閉機構部３１の当接片３３ａの一部が、側面視でプリント基板２０と重ならない第一位置（図４）から、側面視でプリント基板２０と重なる第二位置（すなわちプリント基板２０と遮断器ケース４の側面との隙間であって、図６に示される位置）へ移動する。
尚、第一カム部材３３と第二カム部材３４とは、一旦係止状態が解除となった後、捻りバネ３６によって、図６に示す如く再びラッチ状態へと復帰する。したがって、正常状態に回復した後には、操作ハンドル５を図４に示すような傾倒状態まで回動操作するだけで、開閉機構部３１はラッチ状態のままセパレータ２１とともに下方へ移動し、再びセパレータ２１を通電位置にて維持するようになる。 Here, when the tripping member 35 momentarily slides up and down in response to the occurrence of leakage or overcurrent, the latching state in the opening / closing mechanism 31 is released as described above, so the second cam member 34 rotates about the shaft portion 34d, and the pressing operation of the link member 37 by the tip of the pressing claw portion 34a is also released. Therefore, the separator 21 slides upward together with the opening / closing mechanism 31 by the biasing force of the cutoff spring 32 (FIGS. 5 and 6), the fixed contact 11a and the movable contact 23a are dissociated, and the main electric circuit is interrupted. become. Further, from the first position (FIG. 4) where the contact piece 33a of the opening / closing mechanism 31 does not overlap with the printed circuit board 20 in the side view due to the sliding of the separator 21 at the time of the interruption, the printed circuit board in the side view. 20 is moved to a second position overlapping with 20 (that is, the gap between the printed circuit board 20 and the side surface of the circuit breaker case 4 and the position shown in FIG. 6).
The first cam member 33 and the second cam member 34 once return to the latched state as shown in FIG. 6 by the torsion spring 36 after the locked state is once released. Therefore, after the normal state is recovered, the opening / closing mechanism 31 is moved downward together with the separator 21 in the latched state only by rotating the operation handle 5 to the tilted state as shown in FIG. Is maintained at the energized position.

以上のような構成を有する回路遮断器１によれば、電源側端子２及び負荷側端子３を上下方向に並設するとともに、主電路を開閉操作するセパレータ２１を負荷側端子３の並設方向へ摺動可能に設けている。したがって、負荷側端子３を水平方向に並設していたような従来の回路遮断器と比較すると、回路遮断器１を小型化・薄型化することができる。 According to the circuit breaker 1 having the above configuration, the power supply side terminal 2 and the load side terminal 3 are arranged in parallel in the vertical direction, and the separator 21 for opening and closing the main electric circuit is arranged in the direction in which the load side terminal 3 is arranged in parallel. It is slidably provided. Therefore, the circuit breaker 1 can be reduced in size and thickness as compared with a conventional circuit breaker in which the load side terminals 3 are arranged in parallel in the horizontal direction.

また、主電路をＯＮ／ＯＦＦ操作するセパレータ２１を筒状に形成し、該セパレータ２１内に可動接点２３ａ、２３ａ・・を設置する一方、セパレータ２１に固定金具１１の固定接点１１ａを差し込み可能な差込孔２２、２２・・を開設し、セパレータ２１内に固定接点１１ａと可動接点２３ａとによる主電路の開閉接点部を設けた構成としている。したがって、遮断器ケースに一端が固定された可動金具をスイッチ部材により押圧／解除して主電路のＯＮ／ＯＦＦ操作を行っていた従来のものと比較すると、遮断器ケース４内の空間を有効利用しており、回路遮断器１の小型化・薄型化を実現することができる。 In addition, the separator 21 for turning the main electric circuit ON / OFF is formed in a cylindrical shape, and the movable contacts 23a, 23a,... Are installed in the separator 21, while the fixed contact 11a of the fixing bracket 11 can be inserted into the separator 21. The insertion holes 22, 22... Are opened, and the separator 21 is provided with an open / close contact portion of the main electric circuit by the fixed contact 11 a and the movable contact 23 a. Therefore, the space in the circuit breaker case 4 is effectively used as compared with the conventional one in which the movable metal fitting whose one end is fixed to the circuit breaker case is pressed / released by the switch member and the main circuit is turned on / off. Thus, the circuit breaker 1 can be reduced in size and thickness.

さらに、可動金具２３、２３・・をセパレータ２１に取り付けてセパレータ２１の移動により強制的に解離動作するようにしているため、たとえば熱により固定接点１１ａと可動接点２３ａとが溶着する等した際にも、セパレータ２１による主電路のＯＦＦ操作に伴う固定接点１１ａと可動接点２３ａとの解離を確実に行うことができる。さらにまた、従来採用していたような金属片と比較して可動金具２３の小型化を図ることができ、ひいては回路遮断器１の一層の小型化・薄型化を実現することができる。 Further, since the movable metal fittings 23, 23,... Are attached to the separator 21 so as to be forcibly dissociated by the movement of the separator 21, for example, when the fixed contact 11a and the movable contact 23a are welded by heat or the like. In addition, the fixed contact 11a and the movable contact 23a can be reliably dissociated with the main electric circuit OFF operation by the separator 21. Furthermore, the movable bracket 23 can be reduced in size as compared with a metal piece that has been conventionally used, and as a result, the circuit breaker 1 can be further reduced in size and thickness.

加えて、可動接点２３ａを固定接点１１ａ側へ押圧する押圧バネ２８をセパレータ２１内に設けているため、押圧バネ２８、２８・・の設置スペースをも省スペース化することができ、回路遮断器１の小型化・薄型化をより図ることができるとともに、接点同士の接触状態を安定させることができ、接点同士間における接触不良等が生じない。 In addition, since the pressing spring 28 that presses the movable contact 23a toward the fixed contact 11a is provided in the separator 21, the installation space for the pressing springs 28, 28,. 1 can be further reduced in size and thickness, and the contact state between the contacts can be stabilized, so that contact failure between the contacts does not occur.

一方、開閉機構部３１をセパレータ２１に一体的に設けるとともに、円板状の第一カム部材３３と、該第一カム部材３３に係止する板状の第二カム部材３４と、両カム部材３３、３４の係止状態を維持する捻りバネ３６とからなるものとし、係止状態にある第一カム部材３３と第二カム部材３４とを遮断器ケース４の側面と平行に垂設して構成している。したがって、Ｔ字状の引き外し部材を腕部が左右方向へ伸びるような姿勢で設置していた従来のものと比較して、開閉機構部３１を小型化することが可能で、ひいては回路遮断器１を小型化・薄型化することができる。 On the other hand, the opening / closing mechanism 31 is provided integrally with the separator 21, the disk-shaped first cam member 33, the plate-shaped second cam member 34 that is engaged with the first cam member 33, and both cam members The first cam member 33 and the second cam member 34 in the locked state are suspended in parallel with the side surface of the circuit breaker case 4. It is composed. Therefore, it is possible to reduce the size of the opening / closing mechanism 31 as compared with the conventional one in which the T-shaped tripping member is installed in such a posture that the arm portion extends in the left-right direction, and as a result, the circuit breaker. 1 can be reduced in size and thickness.

また、回動可能に軸支された第一カム部材３３に係合突起３３ｃを突設するとともに、回動可能に軸支された第二カム部材３４に係合突起３３ｃが突設している側へ突出する係合壁３４ｃを設けており、捻りバネ３６を、その一端が係合突起３３ｃに、他端が係合壁３４ｃに係合するように第二カム部材３４の軸部３４ｄに取り付けて、該捻りバネ３６により両カム部材３３、３４を係止方向へ付勢するようにしている。このように、一つのバネ部材により二つのカム部材の係止状態を維持してラッチ状態とするようにしているため、部品点数を削減することができ、回路遮断器１を小型化することができる。さらに、捻りバネ３６により、遮断動作に伴って第一カム部材３３と第二カム部材３４とのラッチ状態が一旦解除されたとしても、両カム部材３３、３４が自動的にラッチ状態へと復帰するようになっており、使い勝手が良い。 In addition, an engaging projection 33c projects from the first cam member 33 pivotally supported, and an engaging projection 33c projects from the second cam member 34 pivotally supported. The torsion spring 36 is provided on the shaft portion 34d of the second cam member 34 so that one end thereof engages with the engagement protrusion 33c and the other end engages with the engagement wall 34c. The cam members 33 and 34 are urged in the locking direction by the torsion spring 36. As described above, since the latching state of the two cam members is maintained by the single spring member, the number of parts can be reduced, and the circuit breaker 1 can be downsized. it can. Furthermore, even if the latched state of the first cam member 33 and the second cam member 34 is once released by the torsion spring 36 due to the shut-off operation, both the cam members 33 and 34 automatically return to the latched state. It is designed to be easy to use.

またさらに、主電路を開閉操作するセパレータ２１を上下方向に摺動可能に設けるとともに、該セパレータ２１を遮断動作させる開閉機構部３１を、セパレータ２１の上方に連設して形成している。したがって、回路遮断器１内の構造部の左右方向への張り出し量を抑えることができ、回路遮断器１の一層の薄型化を図ることができる。
加えて、セパレータ２１と一体的に形成され、セパレータ２１とともに遮断器ケース４内を摺動する開閉機構部３１の当接片３３ａの一部が、セパレータ２１の遮断方向への摺動に伴い、側面視でプリント基板２０と重ならない第一位置から、側面視でプリント基板２０と重なる第二位置へ移動するようになっている。したがって、遮断器ケース４内の空間の有効利用を図ることができ、開閉機構部３１を遮断器ケース４内で移動可能としているにも拘わらず、遮断器ケース４の小型化・薄型化を実現することができる。 Furthermore, a separator 21 that opens and closes the main electric circuit is provided to be slidable in the vertical direction, and an opening / closing mechanism 31 that shuts off the separator 21 is provided continuously above the separator 21. Therefore, the amount of protrusion of the structure portion in the circuit breaker 1 in the left-right direction can be suppressed, and the circuit breaker 1 can be further reduced in thickness.
In addition, a part of the contact piece 33a of the opening / closing mechanism 31 that is formed integrally with the separator 21 and slides in the circuit breaker case 4 together with the separator 21, It moves from a first position that does not overlap the printed circuit board 20 in a side view to a second position that overlaps the printed circuit board 20 in a side view. Therefore, the space in the circuit breaker case 4 can be effectively used, and the circuit breaker case 4 can be reduced in size and thickness even though the switching mechanism 31 can be moved in the circuit breaker case 4. can do.

なお、本発明の回路遮断器に係る構成は、上記実施形態に記載の態様に何ら限定されるものではなく、遮断器ケース、開閉機構部、セパレータ、及び各端子等に係る構成を、本発明の趣旨を逸脱しない範囲で、必要に応じて適宜変更することができる。 The configuration according to the circuit breaker of the present invention is not limited to the aspect described in the above embodiment, and the configuration according to the circuit breaker case, the opening / closing mechanism unit, the separator, each terminal, and the like is described in the present invention. As long as it does not deviate from the above, it can be changed as necessary.

たとえば、接点操作部材の移動方向や主電路のＯＮ／ＯＦＦ操作に係る構成等も上記実施形態に記載の態様に何ら限定されることなく、回路遮断器の前面を垂直に形成し、接点操作部材を垂直方向へ摺動させることによって、主電路をＯＮ／ＯＦＦ操作するようにしても何ら問題はないし、接点操作部材の下方への摺動により主電路をＯＦＦ操作するように構成したり、回路遮断器の前面は傾斜面としたままで接点操作部材を略垂直方向へ移動させる（すなわち、回路遮断器の前面と接点操作部材の移動方向とを平行にはしない）ように構成してもよい。 For example, the configuration related to the moving direction of the contact operation member and the ON / OFF operation of the main electric circuit is not limited to the aspect described in the above embodiment, and the front surface of the circuit breaker is formed vertically, and the contact operation member There is no problem even if the main electric circuit is turned on / off by sliding it vertically, and the main electric circuit is turned off by sliding the contact operation member downward, The contact operation member may be moved in a substantially vertical direction with the front surface of the circuit breaker being an inclined surface (that is, the front surface of the circuit breaker and the moving direction of the contact operation member are not parallel). .

また、上記実施形態では、接点操作部材を筒状に形成しているが、接点操作部材の形状も適宜変更可能であって、ブロック状又は柱状の接点操作部材に、切り欠き部を上下方向に複数設け、該切り欠き部内に可動接点を設置するような構成としてもよい。
さらに、開閉機構部の位置も、接点操作部材の上部に何ら限定されることはなく、接点操作部材の後部又は前部に設けることも当然可能である。さらにまた、上記実施の形態では、開閉機構部の当接片の一部が、接点操作部材の摺動に伴い、側面視で電気回路基板と重ならない第一位置から、側面視で電気回路基板と重なる第二位置へ移動するように構成しているが、開閉機構部の他の構成要素が側面視で電気回路基板と重なるようにしてもよいし、接点操作部材の動作に拘わらず、開閉機構部の一部が常に側面視で電気回路基板と重なるように接点操作部材及び開閉機構部を設置することも可能である。加えて、上記実施形態では、電源側端子及び負荷側端子を平面視一直線上に配置しているが、平面視略一直線上であれば僅かに左右へずらして配置しても構わない。 Moreover, in the said embodiment, although the contact operation member is formed in the cylinder shape, the shape of a contact operation member can also be changed suitably, and a notch part is made into a block shape or a column-shaped contact operation member in an up-down direction. It is good also as a structure which provides multiple and sets a movable contact in this notch part.
Furthermore, the position of the opening / closing mechanism is not limited to the upper part of the contact operating member, and can naturally be provided at the rear or front of the contact operating member. Furthermore, in the above-described embodiment, a part of the abutment piece of the opening / closing mechanism portion is not electrically overlapped with the electric circuit board in the side view as the contact operating member slides, and the electric circuit board in the side view. However, other components of the opening / closing mechanism may overlap the electric circuit board in a side view, and the opening / closing operation can be performed regardless of the operation of the contact operating member. It is also possible to install the contact operating member and the opening / closing mechanism so that a part of the mechanism always overlaps the electric circuit board in a side view. In addition, in the above embodiment, the power supply side terminal and the load side terminal are arranged on a straight line in plan view, but may be slightly shifted to the left and right as long as they are on a substantially straight line in plan view.

回路遮断器の外観を示した斜視説明図である。It is perspective explanatory drawing which showed the external appearance of the circuit breaker. 遮断器ケースの右側を外して回路遮断器の内部機構を示した斜視説明図である。It is the perspective explanatory view which removed the right side of the circuit breaker case and showed the internal mechanism of the circuit breaker. セパレータ及び主電路の開閉接点部を示した斜視説明図である。It is perspective explanatory drawing which showed the opening / closing contact part of the separator and the main electrical circuit. （ａ）は回路遮断器のセパレータ及び開閉機構部内部が表れる側断面を示した断面説明図であり、（ｂ）は（ａ）における開閉機構部を拡大して示した拡大説明図である。(A) is sectional explanatory drawing which showed the side cross section in which the separator of a circuit breaker and the inside of an opening-and-closing mechanism part appear, (b) is an expanded explanatory view which expanded and showed the opening-and-closing mechanism part in (a). （ａ）は主電路を遮断した状態の回路遮断器を示した斜視説明図である。(A) is the perspective explanatory view which showed the circuit breaker of the state which interrupted | blocked the main electric circuit. （ａ）は主電路が遮断された状態における回路遮断器のセパレータ及び開閉機構部内部が表れる側断面を示した断面説明図、（ｂ）は（ａ）における開閉機構部を拡大して示した拡大説明図である。(A) is sectional explanatory drawing which showed the side cross section which the separator of a circuit breaker in the state by which the main circuit was interrupted, and the inside of an opening-and-closing mechanism part appeared, (b) expanded and showed the opening-and-closing mechanism part in (a) FIG.

符号の説明Explanation of symbols

１・・回路遮断器、２・・電源側端子、３・・負荷側端子、４・・遮断器ケース、５・・操作ハンドル、８・・トリップコイル、１１・・固定金具、１１ａ・・固定接点、２１・・セパレータ、２３・・可動金具、２３ａ・・可動接点、３１・・開閉機構部、３３・・第一カム部材、３３ａ・・当接片、３３ｂ・・係止片、３３ｃ・・係合突起、３４・・第二カム部材、３４ａ・・押さえ爪部、３４ｂ・・係止段部、３４ｃ・・係合壁、３５・・引き外し部材、３６・・捻りバネ、３７・・リンク部材。 1 .... Circuit breaker 2 .... Power supply side terminal 3 .... Load side terminal 4 .... Circuit breaker case 5 .... Operating handle 8 ... Trip coil 11 ... Fixing bracket 11a ... Fixing Contact, 21 ·· Separator, 23 ·· Moving bracket, 23a ·· Moving contact, 31 ·· Opening / closing mechanism part, 33 ·· First cam member, 33a ·· Contact piece, 33b ·· Locking piece, 33c · -Engaging projections, 34-Second cam member, 34a-Holding claw, 34b-Locking step, 34c-Engaging wall, 35-Tripping member, 36-Torsion spring, 37- -Link member.

Claims

遮断器ケースの背面に電源側端子、前面に負荷側端子が夫々上下方向に配設され、前記遮断器ケース内に、前記電源側端子と前記負荷側端子との間の電路に設けられた固定接点と可動接点とからなる開閉接点部と、前記開閉接点部を開動作させるための接点操作部材と、ラッチ機構を備えて漏電、過電流、又は短絡等の電路異常が発生したらラッチを解除し、前記接点操作部材を所定方向へ付勢移動させて前記開閉接点部を開動作させる開閉機構部とを備えた回路遮断器であって、
前記遮断器ケース内に、前記電路異常を検知する異常検知回路が組み込まれた電気回路基板を前記遮断器ケース側面に平行となる起立状態で設置する一方、
前記開閉機構部と前記接点操作部材とを一体化するとともに、前記接点操作部材の付勢移動に伴い、前記開閉機構部の少なくとも一部が、側面視で前記電気回路基板と重ならない第一位置から、前記電気回路基板と前記遮断器ケースの側面との隙間であって側面視で前記電気回路基板と重なる第二位置へ移動するように前記接点操作部材及び開閉機構部を設置したことを特徴とする回路遮断器。 Line terminal on the back of the circuit breaker case, the load-side terminal on the front is disposed on each vertically, within said circuit breaker case, provided path between the front Symbol power source side terminal and the load terminal Open / close contact part consisting of fixed contact and movable contact, contact operating member for opening the open / close contact part, and latch mechanism to release the latch when an electric circuit abnormality such as leakage, overcurrent or short circuit occurs And a circuit breaker comprising an opening / closing mechanism for urging and moving the contact operating member in a predetermined direction to open the opening / closing contact.
In the circuit breaker case, while installing an electric circuit board incorporating an abnormality detection circuit for detecting the electric circuit abnormality in an upright state parallel to the side surface of the circuit breaker case,
A first position in which the opening / closing mechanism and the contact operating member are integrated and at least a part of the opening / closing mechanism is not overlapped with the electric circuit board in a side view as the contact operating member is biased. The contact operation member and the opening / closing mechanism are installed so as to move to a second position that is a gap between the electric circuit board and the side surface of the circuit breaker case and overlaps the electric circuit board in a side view. A circuit breaker.

開閉機構部のラッチ機構を、左右方向を軸として回動可能に軸支された板状の第一カム部材と、前記第一カム部材の一部が係止可能な係止部を有し、左右方向を軸として回動可能に軸支された板状の第二カム部材と、一端が前記第一カム部材に突設された第一係合突部に、他端が前記第一係合突部と同方向へ突設された第二係合突部に夫々係合し、両カム部材を係止方向へ付勢してラッチ状態とするバネ部材とで形成したことを特徴とする請求項１に記載の回路遮断器。 A latch mechanism of the opening and closing mechanism section, a plate-like first cam member pivotally supported about the left-right direction as an axis, and a latching section on which a part of the first cam member can be latched, A plate-like second cam member pivotally supported about the left and right direction, one end projecting from the first cam member and one end projecting from the first cam member It is formed by a spring member that engages with each of the second engaging protrusions protruding in the same direction as the protrusion, and biases both cam members in the locking direction so as to be in a latched state. Item 4. The circuit breaker according to Item 1.