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JP5219071B2 - Overcurrent trip mechanism - Google Patents

Overcurrent trip mechanism Download PDF

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JP5219071B2
JP5219071B2 JP2008097967A JP2008097967A JP5219071B2 JP 5219071 B2 JP5219071 B2 JP 5219071B2 JP 2008097967 A JP2008097967 A JP 2008097967A JP 2008097967 A JP2008097967 A JP 2008097967A JP 5219071 B2 JP5219071 B2 JP 5219071B2
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bimetal
tripping mechanism
overcurrent tripping
engagement piece
circuit breaker
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JP2008097967A
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Japanese (ja)
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JP2009252484A (en
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徹郎 柴田
肇 渡邊
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河村電器産業株式会社
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Description

本発明は、回路遮断器における過電流引き外し機構に関するものである。   The present invention relates to an overcurrent tripping mechanism in a circuit breaker.

従来、過電流引き外し機構を用いた回路遮断器には特許文献１に記載されているような、器体の内部に、ラッチ部材との係止が解除されると通常時に蓄積した力によって接点部を強制開極させる掛合片５１と、一端側を固定端とするとともに他端側を自由端とし、通電電路に過電流が流れたときに自由端が掛合片５１を係止解除方向に押圧駆動するバイメタル５２と、バイメタル５２と掛合片５１との相対的な位置関係を変化させる調整螺子と、調整螺子が螺合するねじ孔が貫設されたナット部材とを収納した回路遮断器があった。
特開２００８−３４３１３ Conventionally, circuit breakers using an overcurrent tripping mechanism have contact points with the force accumulated during normal operation when the latch with the latch member is released, as described in Patent Document 1, as described in Patent Document 1. the lock plate 51 to part the force opening, and a free end of the other end with a fixed end of the one end, pushing the free end of the lock plate 51 in the unlocking direction when the overcurrent flows to the current path There is a circuit breaker that houses a bimetal 52 to be driven, an adjustment screw that changes the relative positional relationship between the bimetal 52 and the engagement piece 51, and a nut member through which a screw hole into which the adjustment screw is screwed. It was.
JP2008-34313

しかしながら、特許文献１に記載の発明では、引き締めネジによる締め付けが可撓電線を伝ってバイメタルに影響し、バイメタルも回動させる。これによって、回路遮断器によって引き外し部材とバイメタルとの距離に違いが生じ、電路が遮断されるまでの時間が一定ではなくなるという欠点がある。又、バイメタルの回動が過度である場合は通電してから、すぐに電路を遮断する恐れがあるという欠点がある。   However, in the invention described in Patent Document 1, the tightening by the tightening screw travels through the flexible wire to affect the bimetal, and the bimetal is also rotated. As a result, the circuit breaker causes a difference in the distance between the tripping member and the bimetal, and there is a disadvantage that the time until the electric circuit is cut off is not constant. In addition, if the bimetal is excessively rotated, there is a drawback that the electric circuit may be interrupted immediately after energization.

このため、本発明によって解決しようとする課題は、負荷側の端子を締め付けた際の回動によってバイメタルまでも回動した場合であっても、回路遮断器によってバイメタルと掛合片との距離に違いが生じることを防ぎ、電路が遮断されるまでの所要時間を一定に得られる過電流引外し機構を提供することにある。   Therefore, the problem to be solved by the present invention is that the distance between the bimetal and the engagement piece is different by the circuit breaker even if the bimetal is rotated by the rotation when the load side terminal is tightened. It is an object of the present invention to provide an overcurrent tripping mechanism that prevents the occurrence of the occurrence of a fault and can obtain a constant time required until the electric circuit is interrupted.

上記した課題を解決するためになされた本発明の過電流引外し機構は、回路遮断器のケース内部に設けられる過電流引き外し機構であって、この過電流引き外し機構は長板から形成されると共に一端を固定してなるバイメタルと、バイメタルによって押圧駆動する掛合片とからなり、バイメタルと掛合片との当接面において、掛合片を凸型、又はバイメタルを略半円に変形させて設けたものである。 The overcurrent tripping mechanism of the present invention made to solve the above-mentioned problem is an overcurrent tripping mechanism provided inside a case of a circuit breaker, and this overcurrent tripping mechanism is formed from a long plate. In addition, a bimetal with one end fixed and a latching piece that is pressed and driven by the bimetal, the latching piece is provided on the abutting surface of the bimetal and the latching piece , or the bimetal is deformed into a substantially semicircle. It is a thing.

本発明の過電流引外し機構によれば、バイメタルと掛合片との当接面において、掛合片を凸型、又はバイメタルを略半円に変形させて設けることで、端子ネジを締め付けた際に端子が回動した場合であっても、回路遮断器によって掛合片とバイメタルとの距離に違いが生じることを防ぐことが可能である。これにより、電路を遮断するまでの時間を一定に得ることが可能である。 According to the overcurrent tripping mechanism of the present invention, at the contact surface between the bimetal and the engagement piece, the engagement piece is provided with a convex shape, or the bimetal is deformed into a substantially semicircular shape, thereby tightening the terminal screw. Even when the terminal rotates, it is possible to prevent the circuit breaker from causing a difference in the distance between the engagement piece and the bimetal. Thereby, it is possible to obtain a constant time until the electric circuit is cut off.

本発明では、電路の遮断までの時間を一定に得られる構造を少ない加工で可能にした。   In the present invention, a structure that can obtain a constant time until the electric circuit is interrupted can be obtained with a small amount of processing.

以下、本発明の実施の形態を説明する。
回路遮断器のケース内部に設けられる過電流引き外し機構であって、この過電流引き外し機構は長板から形成されると共に一端を負荷座３３に固定される接続座３４と一体としたバイメタル３２と、バイメタル３２によって押圧駆動する掛合片３１とからなり、バイメタル３２と掛合片３１との当接面において、掛合片３１を凸型３８に設けた。これにより、端子ネジ３６によって端子３５に配置された負荷座３３の締め付けと共にバイメタル３２が回動した場合であっても、回路遮断器によってバイメタル３２と掛合片３１との間の距離に違いが生じることを防ぐことが可能であるため、電路を遮断するまでの時間を一定に得ることが可能である。 Embodiments of the present invention will be described below.
An overcurrent tripping mechanism provided inside a case of a circuit breaker, the overcurrent tripping mechanism being formed of a long plate and integrated with a connection seat 34 having one end fixed to a load seat 33. And the engaging piece 31 that is pressed and driven by the bimetal 32, and the engaging piece 31 is provided on the convex mold 38 at the contact surface between the bimetal 32 and the engaging piece 31. Thereby, even if the bimetal 32 rotates together with the tightening of the load seat 33 disposed on the terminal 35 by the terminal screw 36, the circuit breaker causes a difference in the distance between the bimetal 32 and the engagement piece 31. Since this can be prevented, it is possible to obtain a constant time until the electric circuit is cut off.

回路遮断器のケース内部に設けられる過電流引き外し機構であって、この過電流引き外し機構は長板から形成されると共に一端を負荷座４３に固定される接続座４４と一体としたバイメタル４２と、バイメタル４２によって押圧駆動する掛合片４１とからなり、バイメタル４２と掛合片４１との当接面において、バイメタル４２を略半円４９に設けた。これにより、端子ネジ４６によって端子４５に配置された負荷座４３の締め付けと共にバイメタル４２が回動した場合であっても、回路遮断器によってバイメタル４２と掛合片４１との間の距離に違いが生じることを防ぐことが可能であるため、電路を遮断するまでの時間を一定に得ることが可能である。   An overcurrent tripping mechanism provided inside a case of a circuit breaker, the overcurrent tripping mechanism being formed of a long plate and integrated with a connection seat 44 having one end fixed to a load seat 43. And the engagement piece 41 that is pressed and driven by the bimetal 42, and the bimetal 42 is provided in a substantially semicircle 49 on the contact surface between the bimetal 42 and the engagement piece 41. Thereby, even when the bimetal 42 is rotated together with the tightening of the load seat 43 arranged on the terminal 45 by the terminal screw 46, the circuit breaker causes a difference in the distance between the bimetal 42 and the engagement piece 41. Since this can be prevented, it is possible to obtain a constant time until the electric circuit is cut off.

以上のように、本発明の過電流引外し機構は、掛合片を凸型、又はバイメタルを略半円に変形させて設けたことで、回路遮断器によって掛合片とバイメタルとの距離に違いが生じることを防ぎ、電路が遮断されるまでの時間も一定とすることが可能となるものである。 As described above, the overcurrent tripping mechanism of the present invention has a difference in the distance between the engagement piece and the bimetal by the circuit breaker by providing the engagement piece with a convex shape or by deforming the bimetal into a substantially semicircle. It is possible to prevent the occurrence and to make the time until the electric circuit is cut off constant.

本発明の実施例１における、過電流引外し機構の斜視図である。It is a perspective view of an overcurrent tripping mechanism in Example 1 of the present invention. 本発明の実施例１における、過電流引外し機構の天面図である。It is a top view of the overcurrent tripping mechanism in Example 1 of the present invention. 従来技術における、特許文献２に記載の過電流引外し機構の断面図である。It is sectional drawing of the overcurrent trip mechanism of patent document 2 in a prior art.

３１、４１、５１ 掛合片
３２、４２、５２ バイメタル
３３、４３ 負荷座
３４、４４ 接続座
３５、４５ 端子
３６、４６ 端子ネジ
３８ 凸部
４９ 略半円 31, 41, 51 Engagement piece 32, 42, 52 Bimetal 33, 43 Load seat 34, 44 Connection seat 35, 45 Terminal 36, 46 Terminal screw 38 Protrusion 49 Substantially semicircle

Claims (1)

回路遮断器のケース内部に設けられる過電流引き外し機構であって、該過電流引き外し機構は長板から形成されると共に一端を固定してなるバイメタルと、該バイメタルによって押圧駆動する掛合片とからなり、前記バイメタルと前記掛合片との当接面において、前記掛合片を凸型、又は前記バイメタルを略半円に変形させて設けたことを特徴とする過電流引き外し機構。 An overcurrent tripping mechanism provided inside a case of a circuit breaker, wherein the overcurrent tripping mechanism is formed of a long plate and has one end fixed, and a latching piece that is pressed and driven by the bimetal. An overcurrent tripping mechanism comprising: a contact surface between the bimetal and the engagement piece, wherein the engagement piece is formed in a convex shape or the bimetal is deformed into a substantially semicircle .
JP2008097967A 2008-04-04 2008-04-04 Overcurrent trip mechanism Active JP5219071B2 (en)

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CN108172479B (en) * 2018-02-01 2024-04-09 雅絮智能科技有限公司 Moving contact of molded case circuit breaker

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JPS59195654U (en) * 1983-06-15 1984-12-26 松下電工株式会社 Breaker arc extinguishing device
JP4724067B2 (en) * 2006-07-31 2011-07-13 パナソニック電工電路株式会社 Circuit breaker

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