JP2021125374A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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JP2021125374A
JP2021125374A JP2020018157A JP2020018157A JP2021125374A JP 2021125374 A JP2021125374 A JP 2021125374A JP 2020018157 A JP2020018157 A JP 2020018157A JP 2020018157 A JP2020018157 A JP 2020018157A JP 2021125374 A JP2021125374 A JP 2021125374A
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housing
pocket
pocket cover
insertion piece
circuit breaker
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JP7390202B2 (en
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小有里 品田
Sayuri Shinada
小有里 品田
啓太 清水
Keita Shimizu
啓太 清水
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Kawamura Electric Inc
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Kawamura Electric Inc
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Abstract

To provide a circuit breaker having a pocket cover which can be easily removed but is hardly detached even if internal pressure rises.SOLUTION: A circuit breaker has a pocket part 5, for housing an accessory device, on an upper surface of a housing 1 provided with a power supply-side terminal 3 on the rear side, a load-side terminal 4 on the front side, and an operating handle 2 at the center of the upper surface. A pocket cover 6 for closing the pocket part 5 is configured such that its rear side is screwed to the housing 1 while its front side is provided with an insertion piece 63 which is inserted, at an upper portion of the pocket part, into a back portion of the upper surface of the housing 1 and is locked thereto. The upper portion of the pocket part 5 has an engagement hole 12 into which the insertion piece 63 is inserted. When the insertion piece 63 is inserted into the engagement hole 12 and is locked thereto, front and rear ends of the pocket cover 6 is fixed to the housing 1.SELECTED DRAWING: Figure 1

Description

本発明は回路遮断器に関し、特に付属装置を収納するためのポケット部を備えた回路遮断器に関する。 The present invention relates to a circuit breaker, and more particularly to a circuit breaker provided with a pocket for accommodating an accessory device.

回路遮断器には、トリップ動作を外部に通知する警報スイッチや外部の電圧信号によりトリップ動作させる引き外し装置等の付属装置をオプションとして取り付け可能としたものがある。このような回路遮断器は、付属装置を後から容易に取り付けできるよう、操作ハンドル周囲にポケットを設けて容易に収容可能としている。そして、ポケットは通常ポケットカバーで覆われて閉塞されている（例えば、特許文献１参照）。 Some circuit breakers can be optionally equipped with an accessory device such as an alarm switch for notifying the outside of the trip operation and a trip operation by an external voltage signal. Such a circuit breaker is easily accommodated by providing a pocket around the operation handle so that the accessory device can be easily attached later. The pocket is usually covered with a pocket cover and closed (see, for example, Patent Document 1).

特許第４９６６７５９号公報Japanese Patent No. 49666759

回路遮断器は、短絡電流等の大電流が流れると接点の解離動作等でアークが発生し、その熱でハウジング内が一瞬高圧状態となることが知られている。このような状況が発生すると、ポケットを備えた回路遮断器の場合、発生した圧力でポケットを閉塞しているポケットカバーが外方に飛ばされる場合があった。
そのため、ポケットカバーは高圧状態が発生しても飛ばされないよう取り付ける必要があり、特許文献１ではポケットカバーのハウジングに連結する蝶番を肉厚に形成することで強度をアップし、内部の高圧圧力状態に耐えるよう工夫が成された。
しかしながら、蝶番を設けるにはポケットの端部にそれを形成するスペースが必要であり、ポケットがその分狭くなった。加えて、付属装置を取り付ける際にポケットカバーが邪魔になる場合があり、ポケットカバーを容易に取り外せる構造の要望があった。 It is known that when a large current such as a short-circuit current flows in a circuit breaker, an arc is generated due to a contact dissociation operation or the like, and the heat causes the inside of the housing to be in a high voltage state for a moment. When such a situation occurs, in the case of a circuit breaker provided with a pocket, the pocket cover blocking the pocket may be blown outward by the generated pressure.
Therefore, it is necessary to attach the pocket cover so that it will not be blown even if a high pressure state is generated. In Patent Document 1, the hinge connected to the housing of the pocket cover is formed thick to increase the strength, and the internal high pressure state. It was devised to withstand.
However, providing a hinge requires space at the end of the pocket to form it, which narrows the pocket. In addition, the pocket cover may be an obstacle when attaching the accessory device, and there is a demand for a structure in which the pocket cover can be easily removed.

そこで、本発明はこのような問題点に鑑み、ポケットカバーを簡易に取り外しでき、且つ内部圧が上昇しても外れ難い回路遮断器を提供することを目的としている。 Therefore, in view of such a problem, an object of the present invention is to provide a circuit breaker in which the pocket cover can be easily removed and the pocket cover does not easily come off even if the internal pressure rises.

上記課題を解決する為に、請求項１の発明は、後側に電源側端子、前側に負荷側端子、上面中央に操作ハンドルが設けられたハウジングの上面に、付属装置を収納するためのポケット部が凹設されており、ポケット部がポケットカバーで閉塞されて成る回路遮断器であって、ポケットカバーは、前後端部のうちの一端がハウジングにネジ止めされる一方、他端にはポケット部の上部においてハウジングの上面背部に入り込んで係止する挿入片が形成され、ポケット部の上部には、挿入片が入り込む係合孔が形成されて成り、係合孔に挿入片が入り込んで係止し、ポケットカバーの前後端部がハウジングに固定されることを特徴とする。
この構成によれば、ポケットカバーのハウジングへの固定は、一端がネジ止めで他端が係止作用で成されるため、簡易に取り外しできる。そして、一端がネジ止めされるし他端はハウジングの上面背部に入り込んで重ね合わさるため、アークの発生により内部圧が上昇してもポケットカバーは外れ難い。 In order to solve the above problems, the invention of claim 1 is a pocket for accommodating an accessory device on the upper surface of a housing provided with a power supply side terminal on the rear side, a load side terminal on the front side, and an operation handle in the center of the upper surface. A circuit breaker in which a portion is recessed and the pocket portion is closed by a pocket cover. The pocket cover has one end of the front and rear ends screwed to the housing while the other end has a pocket. An insertion piece that enters and locks into the back of the upper surface of the housing is formed in the upper part of the portion, and an engagement hole is formed in the upper part of the pocket portion into which the insertion piece enters, and the insertion piece enters and engages in the engagement hole. It is characterized in that the front and rear ends of the pocket cover are fixed to the housing.
According to this configuration, the pocket cover is fixed to the housing by screwing one end and locking the other end, so that the pocket cover can be easily removed. Since one end is screwed and the other end enters the back of the upper surface of the housing and overlaps with each other, the pocket cover is difficult to remove even if the internal pressure rises due to the generation of an arc.

請求項２の発明は、請求項１に記載の構成において、係合孔には、入り込む挿入片に対して上方から係合する突起が設けられている一方、挿入片の上面には、突起を収容する凹部が設けられていることを特徴とする。
この構成によれば、突起が凹部に入り込むことで、ポケットカバーが前後方向に移動するのが阻止される。よって、挿入して係止する形態であってもポケットカバーが外れ難い。 In the invention of claim 2, in the configuration according to claim 1, the engaging hole is provided with a protrusion that engages with the insertion piece from above, while the protrusion is provided on the upper surface of the insertion piece. It is characterized in that a recess for accommodating is provided.
According to this configuration, the protrusions enter the recesses to prevent the pocket cover from moving in the front-rear direction. Therefore, the pocket cover is hard to come off even in the form of inserting and locking.

請求項３の発明は、請求項２に記載の構成において、係合孔に挿入片が挿入された状態で、アークガス発生によりハウジングの内圧が上昇したら、ポケットカバーの他端側が上方に浮くよう係合孔は挿入片に対して遊びを有して形成されており、ポケットカバーが浮いた際に、突起が凹部に収容されることを特徴とする。
この構成によれば、ポケットカバーを装着して固定した状態でも、内圧の上昇を受けてポケットカバーが浮くため、発生した隙間から内部に発生したガスを外部に逃がすことができ、ハウジングの破損を防止できる。そして、浮いた状態ではポケットカバーの凹部にハウジングの突起が入り込むため、ポケットカバーは外れ難い。一方、ポケットカバーの着脱操作の際には突起と凹部は係合しないので、スムーズに着脱操作できる。 According to the third aspect of the present invention, in the configuration according to the second aspect, when the internal pressure of the housing rises due to the generation of arc gas in a state where the insertion piece is inserted into the engaging hole, the other end side of the pocket cover floats upward. The joint hole is formed with play with respect to the insertion piece, and when the pocket cover floats, the protrusion is accommodated in the recess.
According to this configuration, even when the pocket cover is attached and fixed, the pocket cover floats in response to the increase in internal pressure, so that the gas generated inside can be released to the outside through the generated gap, and the housing is damaged. Can be prevented. Then, in the floating state, the protrusion of the housing enters the recess of the pocket cover, so that the pocket cover is difficult to remove. On the other hand, when the pocket cover is attached / detached, the protrusions and recesses do not engage with each other, so that the pocket cover can be attached / detached smoothly.

本発明によれば、ポケットカバーのハウジングへの固定は、一端がネジ止めで他端が係止作用で成されるため、簡易に取り外しできる。そして、一端がネジ止めされるし他端はハウジングの上面背部に入り込んで重ね合わさるため、アークの発生により内部圧が上昇してもポケットカバーはは外れ難い。 According to the present invention, the pocket cover is fixed to the housing by screwing one end and locking the other end, so that the pocket cover can be easily removed. Since one end is screwed and the other end enters the back of the upper surface of the housing and overlaps with each other, the pocket cover is difficult to remove even if the internal pressure rises due to the generation of an arc.

本発明に係る回路遮断器の一例を示す説明図で、ポケットカバーを分離した回路遮断器の後方から見た斜視図である。It is explanatory drawing which shows an example of the circuit breaker which concerns on this invention, and is the perspective view seen from the rear of the circuit breaker which separated the pocket cover. ポケットカバーを装着した回路遮断器の平面図である。It is a top view of the circuit breaker which attached the pocket cover. ポケットカバーの平面図である。It is a top view of a pocket cover. ポケットカバーの斜視図である。It is a perspective view of a pocket cover. ポケットカバーの背面視斜視図である。It is a rear view perspective view of a pocket cover. 図２に示すＡ−Ａ線の断面図で、（ａ）は通常の状態、（ｂ）は内圧が上昇した状態を示している。In the cross-sectional view taken along the line AA shown in FIG. 2, (a) shows a normal state, and (b) shows a state in which the internal pressure has increased.

以下、本発明を具体化した実施の形態を、図面を参照して詳細に説明する。図１，２は本発明に係る回路遮断器の一例を示す説明図で、図１は斜視図、図２は平面図である。図１はポケットカバーを分離した状態、図２はポケットカバーを装着した状態を示している。回路遮断器は、後側（図２に示す上部）に電源側電路が接続する電源側端子３，前側（図２に示す下側）に負荷側電路が接続する負荷側端子４が設けられ、ハウジング１の上面中央に電路をオン／オフする操作ハンドル２が配置されている。 Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. 1 and 2 are explanatory views showing an example of a circuit breaker according to the present invention, FIG. 1 is a perspective view, and FIG. 2 is a plan view. FIG. 1 shows a state in which the pocket cover is separated, and FIG. 2 shows a state in which the pocket cover is attached. The circuit breaker is provided with a power supply side terminal 3 to which the power supply side electric circuit is connected on the rear side (upper part shown in FIG. 2) and a load side terminal 4 to which the load side electric circuit is connected on the front side (lower side shown in FIG. 2). An operation handle 2 for turning on / off the electric circuit is arranged in the center of the upper surface of the housing 1.

ハウジング１は、底部を構成し、端子、接点、遮断機構等が組み付けられるハウジング本体１ａと、上部を構成してハウジング本体１ａを覆うカバー体１ｂとに分離可能に構成されている。
そして、図1に示すようにハウジング１の上面であるカバー体１ｂの上面に、付属装置（図示せず）を収容するポケット部５が形成されている。ポケット部５は、操作ハンドル２の左右双方に形成され、カバー体１ｂに凹設形成されている。このポケット部５は、ポケットカバー６により閉塞され、７はポケットカバー６をハウジング１に連結固定するためのネジを示している。 The housing 1 is configured to be separable into a housing body 1a which constitutes a bottom portion and to which terminals, contacts, a blocking mechanism and the like are assembled, and a cover body 1b which constitutes an upper portion and covers the housing body 1a.
Then, as shown in FIG. 1, a pocket portion 5 for accommodating an accessory device (not shown) is formed on the upper surface of the cover body 1b, which is the upper surface of the housing 1. The pocket portions 5 are formed on both the left and right sides of the operation handle 2, and are recessed in the cover body 1b. The pocket portion 5 is closed by the pocket cover 6, and 7 indicates a screw for connecting and fixing the pocket cover 6 to the housing 1.

図３−５はポケットカバー６を示し、図３は平面図、図４は斜視図、図５が裏面側斜視図である。ポケットカバー６は、中央に操作ハンドル２を挿通する開口部６１を有し、その左右にポケット部５を閉塞する蓋部６ａを備えており、左右のポケット部５を同時に閉塞するよう形成されている。そして、前後端部にハウジング１への固定部が形成されている。 3-5 shows the pocket cover 6, FIG. 3 is a plan view, FIG. 4 is a perspective view, and FIG. 5 is a back surface side perspective view. The pocket cover 6 has an opening 61 for inserting the operation handle 2 in the center, and has lids 6a for closing the pockets 5 on the left and right sides thereof, and is formed so as to close the left and right pockets 5 at the same time. There is. A fixing portion to the housing 1 is formed at the front and rear ends.

後側（電源側端子３側）には、ハウジング１に固定するためのネジ７を挿通するネジ挿通孔６２が一対設けられている。対応するハウジング１にはネジ孔１１が設けられ、ネジ７によりネジ止めされて連結固定される。
一方、前側（負荷側端子４側）は、ポケットカバー６の後述する挿入片６３がハウジング１（カバー体６ｂ）に係止する構造の固定部を形成している。以下、前側の固定構造を具体的に説明する。 A pair of screw insertion holes 62 for inserting screws 7 for fixing to the housing 1 are provided on the rear side (power supply side terminal 3 side). The corresponding housing 1 is provided with a screw hole 11 and is screwed and fixed by a screw 7.
On the other hand, the front side (load side terminal 4 side) forms a fixed portion having a structure in which the insertion piece 63, which will be described later, of the pocket cover 6 is locked to the housing 1 (cover body 6b). Hereinafter, the fixed structure on the front side will be specifically described.

ポケットカバー６の前側には、複数の挿入片６３が隣接して突設されている。挿入片６３は、ポケットカバー６を前方へ延長する方向に突出形成され、ハウジング１に形成された係合孔１２に挿入されるよう形成されている。
係合孔１２はポケット部５の上端に形成され、ハウジング１の上面から１段下がった部位に、前方に向けて開口形成されている。図２に示すハウジング１のエリアＳが、この係合孔１２及び収容された挿入片６３の位置を示している。 A plurality of insertion pieces 63 are projected adjacent to each other on the front side of the pocket cover 6. The insertion piece 63 is formed so as to project in a direction extending the pocket cover 6 forward and to be inserted into the engagement hole 12 formed in the housing 1.
The engagement hole 12 is formed at the upper end of the pocket portion 5, and an opening is formed toward the front at a portion one step lower than the upper surface of the housing 1. The area S of the housing 1 shown in FIG. 2 indicates the position of the engaging hole 12 and the inserted insertion piece 63.

こうして、挿入片６３がハウジング１上面の背部に入り込んで、ハウジング１の上面に重なるように係合するため、上向きの付勢力に対してポケットカバー６は強い係止作用を示し、外れ難くできる。 In this way, since the insertion piece 63 enters the back portion of the upper surface of the housing 1 and engages with the upper surface of the housing 1 so as to overlap the upper surface of the housing 1, the pocket cover 6 exhibits a strong locking action against an upward urging force and can be made difficult to come off.

更に、図６のＡ−Ａ線断面図に示すように、係合孔１２の入り口には、カバー体１ｂの上面から垂下するように係止突起１２ａが形成されている。対する挿入片６３の上面には、係止突起１２ａを収容する係止凹部６３ａが形成されている。但し、図６（ａ）に示すように通常状態では両者は係合しないよう、係合孔１２は遊びを有して形成されている。
そして、アークガスの発生によりハウジング１の内圧が上昇した状態を図６（ｂ）に示している。内部圧が上昇すると、ポケットカバー６が浮き上がり、係止凹部６３ａに係止突起１２ａが収容され、挿入片６３と係止突起１２ａは係止する。
この結果、アーク発生による内圧上昇を受けて係止突起１２ａが係止凹部６３ａに入り込むため、ポケットカバー６が前後方向にズレることが無く、ポケットカバー６が圧力で変形しても外れることがない。 Further, as shown in the cross-sectional view taken along the line AA of FIG. 6, a locking projection 12a is formed at the entrance of the engaging hole 12 so as to hang down from the upper surface of the cover body 1b. On the upper surface of the insertion piece 63, a locking recess 63a for accommodating the locking projection 12a is formed. However, as shown in FIG. 6A, the engaging holes 12 are formed with play so that they do not engage with each other in the normal state.
FIG. 6B shows a state in which the internal pressure of the housing 1 has increased due to the generation of arc gas. When the internal pressure rises, the pocket cover 6 is lifted, the locking projection 12a is accommodated in the locking recess 63a, and the insertion piece 63 and the locking projection 12a are locked.
As a result, the locking projection 12a enters the locking recess 63a in response to the increase in internal pressure due to the generation of the arc, so that the pocket cover 6 does not shift in the front-rear direction and does not come off even if the pocket cover 6 is deformed by pressure. ..

このように構成されたポケットカバー６の着脱操作は、以下のようである。装着は、まずポケットカバー６を装着位置より僅かに後方に配置してハウジング１に密着させ、前方へスライドさせて挿入片６３を係合孔１２に挿入する。このスライド操作で、挿入片６３が係合孔１２に入り込む。即ち、挿入片６３がハウジング１上面の裏側に挿入される。尚、このとき係止突起１２ａは、挿入片６３に係合しないので、スムーズに挿入できる。
挿入後は、後部をネジ止めすればポケットカバー６の装着は完了となる。また、ポケットカバー６の取り外しは、この逆の手順で行われる。 The operation of attaching and detaching the pocket cover 6 configured in this way is as follows. For mounting, first, the pocket cover 6 is arranged slightly rearward from the mounting position, is brought into close contact with the housing 1, and is slid forward to insert the insertion piece 63 into the engaging hole 12. By this slide operation, the insertion piece 63 enters the engaging hole 12. That is, the insertion piece 63 is inserted into the back side of the upper surface of the housing 1. At this time, since the locking projection 12a does not engage with the insertion piece 63, it can be smoothly inserted.
After the insertion, the attachment of the pocket cover 6 is completed by screwing the rear portion. Further, the pocket cover 6 is removed in the reverse procedure.

このように、ポケットカバー６のハウジング１への固定は、一端がネジ止めで他端が係止作用で成されるため、簡易に取り外しできる。そして、一端がネジ止めされるし他端はハウジングの上面背部に入り込んで重ね合わさるため、アークの発生により内部圧が上昇してもポケットカバーは外れ難い。
また、ポケットカバー６を装着して固定した状態でも、内圧の上昇を受けてポケットカバー６が浮く動作をするため、発生した隙間から内部に発生したガスを外部に逃がすことができ、ハウジング１の破損を防止できる。そして、浮いた状態ではポケットカバー６の凹部にハウジングの突起が入り込むため、ポケットカバー６は外れ難い。一方、ポケットカバー６の着脱操作の際には、係止突起１２ａと係止凹部６３ａは係合しないので、スムーズに着脱操作できる。 As described above, the pocket cover 6 is fixed to the housing 1 by screwing one end and locking the other end, so that the pocket cover 6 can be easily removed. Since one end is screwed and the other end enters the back of the upper surface of the housing and overlaps with each other, the pocket cover is difficult to remove even if the internal pressure rises due to the generation of an arc.
Further, even when the pocket cover 6 is attached and fixed, the pocket cover 6 floats in response to the increase in the internal pressure, so that the gas generated inside can be released to the outside through the generated gap, and the housing 1 Damage can be prevented. Then, in the floating state, the protrusion of the housing enters the recess of the pocket cover 6, so that the pocket cover 6 is difficult to remove. On the other hand, when the pocket cover 6 is attached / detached, the locking projection 12a and the locking recess 63a do not engage with each other, so that the attachment / detachment operation can be performed smoothly.

尚、上記実施形態では、後側をネジ止めして前側を係止させて、ポケットカバー６をハウジング１に固定しているが、前後の固定構造を逆にしても良い。
また、係止突起１２ａは内圧の上昇により係止凹部６３ａに入り込む構成としているが、通常状態でも入り込むよう構成しても良い。 In the above embodiment, the rear side is screwed to lock the front side to fix the pocket cover 6 to the housing 1, but the front and rear fixing structures may be reversed.
Further, although the locking projection 12a is configured to enter the locking recess 63a due to an increase in internal pressure, it may be configured to enter even in a normal state.

１・・ハウジング、１ａ・・ハウジング本体、１ｂ・・カバー体、２・・操作ハンドル、３・・電源側端子、４・・負荷側端子、５・・ポケット部、６・・ポケットカバー、６ａ・・蓋部、７・・ネジ、１１・・ネジ孔、１２・・係合孔、１２ａ・・係止突起（突起）、６２・・ネジ挿通孔、６３・・挿入片、６３ａ・・係止凹部（凹部）。 1 ... Housing, 1a ... Housing body, 1b ... Cover body, 2 ... Operation handle, 3 ... Power supply side terminal, 4 ... Load side terminal, 5 ... Pocket part, 6 ... Pocket cover, 6a・ ・ Cover, 7 ・ ・ Screw, 11 ・ ・ Screw hole, 12 ・ ・ Engagement hole, 12a ・ ・ Locking protrusion (projection), 62 ・ ・ Screw insertion hole, 63 ・ ・ Insert piece, 63a ・ ・Stop recess (recess).

Claims (3)

後側に電源側端子、前側に負荷側端子、上面中央に操作ハンドルが設けられたハウジングの上面に、付属装置を収納するためのポケット部が凹設されており、前記ポケット部がポケットカバーで閉塞されて成る回路遮断器であって、
前記ポケットカバーは、前後端部のうちの一端が前記ハウジングにネジ止めされる一方、
他端には前記ポケット部の上部において前記ハウジングの上面背部に入り込んで係止する挿入片が形成され、前記ポケット部の上部には、前記挿入片が入り込む係合孔が形成されて成り、前記係合孔に前記挿入片が入り込んで係止し、
前記ポケットカバーの前後端部が前記ハウジングに固定されることを特徴とする回路遮断器。 A pocket portion for accommodating an accessory device is recessed on the upper surface of a housing provided with a power supply side terminal on the rear side, a load side terminal on the front side, and an operation handle in the center of the upper surface, and the pocket portion is a pocket cover. A circuit breaker that is blocked
One of the front and rear ends of the pocket cover is screwed to the housing, while
At the other end, an insertion piece that enters and locks into the upper back portion of the housing is formed at the upper portion of the pocket portion, and an engaging hole into which the insertion piece enters is formed at the upper portion of the pocket portion. The insertion piece enters the engagement hole and locks,
A circuit breaker characterized in that the front and rear ends of the pocket cover are fixed to the housing. 前記係合孔には、入り込む前記挿入片に対して上方から係合する突起が設けられている一方、前記挿入片の上面には、前記突起を収容する凹部が設けられていることを特徴とする請求項１記載の回路遮断器。 The engaging hole is provided with a protrusion that engages with the insertion piece from above, while the upper surface of the insertion piece is provided with a recess for accommodating the protrusion. The circuit breaker according to claim 1. 前記係合孔に前記挿入片が挿入された状態で、アークガス発生により前記ハウジングの内圧が上昇したら、前記ポケットカバーの前記他端側が上方に浮くよう前記係合孔は前記挿入片に対して遊びを有して形成されており、
前記ポケットカバーが浮いた際に、前記突起が前記凹部に収容されることを特徴とする請求項２記載の回路遮断器。 When the internal pressure of the housing rises due to the generation of arc gas while the insertion piece is inserted into the engagement hole, the engagement hole plays with respect to the insertion piece so that the other end side of the pocket cover floats upward. Is formed with
The circuit breaker according to claim 2, wherein when the pocket cover floats, the protrusion is housed in the recess.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6318740U (en) * 1986-07-21 1988-02-06
JPH06124638A (en) * 1992-10-14 1994-05-06 Mitsubishi Electric Corp Circuit breaker
JP2000173436A (en) * 1998-11-30 2000-06-23 Mitsubishi Electric Corp Circuit breaker
JP2015002154A (en) * 2013-06-18 2015-01-05 河村電器産業株式会社 Circuit breaker
JP2015207361A (en) * 2014-04-17 2015-11-19 株式会社日立産機システム circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6318740U (en) * 1986-07-21 1988-02-06
JPH06124638A (en) * 1992-10-14 1994-05-06 Mitsubishi Electric Corp Circuit breaker
JP2000173436A (en) * 1998-11-30 2000-06-23 Mitsubishi Electric Corp Circuit breaker
JP2015002154A (en) * 2013-06-18 2015-01-05 河村電器産業株式会社 Circuit breaker
JP2015207361A (en) * 2014-04-17 2015-11-19 株式会社日立産機システム circuit breaker

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