JP5041544B2

JP5041544B2 - Circuit breaker terminal structure

Info

Publication number: JP5041544B2
Application number: JP2008117982A
Authority: JP
Inventors: 和記伊藤
Original assignee: 河村電器産業株式会社
Priority date: 2008-04-30
Filing date: 2008-04-30
Publication date: 2012-10-03
Anticipated expiration: 2028-04-30
Also published as: JP2009266754A

Description

本発明は、端子部に鎖錠ばねを備え、導体を鎖錠ばねの付勢力により端子部に接続する速結端子を有する回路遮断器の端子構造に関するものである。 The present invention relates to a terminal structure of a circuit breaker having a lock spring in a terminal portion and having a quick connection terminal for connecting a conductor to the terminal portion by an urging force of the lock spring.

ねじ締め作業を省き、導体を差し込むだけで接続ができる速結端子を備えた回路遮断器には、特許文献１に記載のものがある。図において、回路遮断器の端子部には、導体を挿入する導入部が設けられ、導入部には導体を受ける端子座が取り付けられている。端子座には導体を接続するための鎖錠ばねが配置されている。鎖錠ばねは導入部から挿入された導体を端子座に押圧して電気的接続を図ると共に、導体に係止して抜け防止としている。
特開２０００−２１５７８０号公報 There exists a thing of patent document 1 in the circuit breaker provided with the quick connection terminal which can connect only by inserting a conductor, omitting the screwing operation. In the figure, the terminal portion of the circuit breaker is provided with an introduction portion for inserting a conductor, and a terminal seat for receiving the conductor is attached to the introduction portion. A lock spring for connecting a conductor is arranged on the terminal seat. The locking spring presses the conductor inserted from the introduction portion against the terminal seat to make an electrical connection, and locks the conductor to prevent it from coming off.
JP 2000-215780 A

しかし、上記のような構造の回路遮断器の端子は、導体を端子と接続する際の導体の差し込み方によっては、鎖錠ばねの弾性限界を超えてしまうことがあった。このような場合、鎖錠ばねが変形してしまい、導体の押圧力や係止力が不足し、導体と端子との接続不良が発生したり、導体が抜けやすくなったりしてしまう問題が発生していた。 However, the terminal of the circuit breaker having the above structure may exceed the elastic limit of the lock spring depending on how the conductor is inserted when connecting the conductor to the terminal. In such a case, the lock spring is deformed, and the pressing force or locking force of the conductor is insufficient, resulting in a problem in that the connection between the conductor and the terminal may be poor or the conductor may be easily disconnected. Was.

そこで本発明は、導体の差し込み方に関わらず、鎖錠ばねの変形を抑えることを目的とし、その構造は、鎖錠ばねは導体を固定するため導体へ付勢された固定部と、導体が抜け落ちることを防止するため端子部の導体導入部へ付勢された抜け止め部とで構成され、鎖錠ばねは、端子座に設けられた保持突起に係止可能である押さえ板により端子座底面に保持されることを特徴とする。 Therefore, the present invention aims to suppress deformation of the lock spring regardless of how the conductor is inserted, and its structure is such that the lock spring is biased toward the conductor to fix the conductor; The locking spring is configured with a retaining portion urged to the conductor introducing portion of the terminal portion to prevent the terminal portion from falling off, and the locking spring is fixed to the bottom surface of the terminal seat by a pressing plate that can be locked to a holding projection provided on the terminal seat. It is characterized by being held in

また、保持突起を、前記鎖錠ばねの底辺部を前記押さえ板を介して前記端子座の底面に押さえつけることが可能な位置に形成することを特徴とする。 Further, the holding projection is formed at a position where the bottom side portion of the locking spring can be pressed against the bottom surface of the terminal seat via the pressing plate.

本発明に係る回路遮断器の端子構造は、導体の差し込み方に関わらず、鎖錠ばねの変形を抑えることを目的とし、その構造は、鎖錠ばねは導体を固定するため導体へ付勢された固定部と、導体が抜け落ちることを防止するため端子部の導体導入部へ付勢された抜け止め部とで構成され、鎖錠ばねは、端子座に設けられた保持突起に係止可能である押さえ板により端子座底面に保持されるため、この保持突起により、鎖錠ばねが所定量を超える変形を抑えることができるので、導体の差し込み方向や、導体の変形による鎖錠ばねへの負荷に関わらず、鎖錠ばねの弾性を維持でき、導体と端子との接続不良や導体が抜けやすくなるといった問題が発生しない。 The terminal structure of the circuit breaker according to the present invention aims to suppress the deformation of the lock spring regardless of how the conductor is inserted. The lock spring is biased toward the conductor to fix the conductor. In order to prevent the conductor from falling off, and a retaining portion urged to the conductor introduction portion of the terminal portion, the locking spring can be locked to a holding projection provided on the terminal seat. Since it is held on the bottom surface of the terminal seat by a certain pressing plate, this holding projection can suppress the deformation of the locking spring beyond a predetermined amount. Regardless, the elasticity of the lock spring can be maintained, and problems such as poor connection between the conductor and the terminal and easy removal of the conductor do not occur.

また、保持突起を、前記鎖錠ばねの底辺部を前記押さえ板を介して前記端子座の底面に押さえつけることが可能な位置に形成するため、この保持突起により、鎖錠ばねが所定量を超える変形を抑えることができるので、導体の差し込み方向や、導体の変形による鎖錠ばねへの負荷に関わらず、鎖錠ばねの弾性を維持でき、導体と端子との接続不良や導体が抜けやすくなるといった問題が発生しない。 Further, since the holding protrusion is formed at a position where the bottom side of the locking spring can be pressed against the bottom surface of the terminal seat via the pressing plate, the locking spring causes the locking spring to exceed a predetermined amount. Because deformation can be suppressed, the elasticity of the lock spring can be maintained regardless of the direction of insertion of the conductor and the load on the lock spring due to deformation of the conductor, making it difficult to connect the conductor to the terminal or disconnect the conductor. Such a problem does not occur.

本発明に係る回路遮断器の端子構造の実施例を図１〜図５の添付図面に基いて説明する。 An embodiment of a terminal structure of a circuit breaker according to the present invention will be described with reference to the accompanying drawings of FIGS.

回路遮断器１内で電流は、電源側端子２から固定接触子３、可動接触子４等を経て、負荷側端子５へと流れている。図１に示すようにオン状態では、ハンドルユニット６が可動接触子４を押した状態で、固定接触子３に可動接触子４が接触しているため通電される。また図２に示すようにオフ状態では、ハンドルユニット６が固定接触子３を引いた状態で、固定接触子３に可動接触４が接触しないため通電されない。 In the circuit breaker 1, current flows from the power supply side terminal 2 to the load side terminal 5 through the fixed contact 3, the movable contact 4, and the like. As shown in FIG. 1, in the ON state, the handle unit 6 pushes the movable contact 4 and is energized because the movable contact 4 is in contact with the fixed contact 3. Further, as shown in FIG. 2, in the off state, the movable contact 4 is not in contact with the fixed contact 3 in the state in which the handle unit 6 pulls the fixed contact 3, so that no power is supplied.

負荷側端子５には端子座７が設けられる。端子座７は、図５に示すように断面略コ字状に上面７ａ、下面７ｂ、一側面７ｃを形成している。端子座７には、鎖錠ばね８を配置している。鎖錠ばね８は回路遮断器１の負荷側端子５に接続される導体を固定する役割を持ち、固定部８ａと抜け止め部８ｂと底辺部８ｃから構成される。固定部８ａは、導体を負荷側端子５に確実に固定するため、端子座７の上面７ａに向かって付勢されている。また、抜け止め部８ｂは一旦接続された導体が抜け落ちないようにするため、端子口９に向かって付勢されている。 A terminal seat 7 is provided on the load side terminal 5. As shown in FIG. 5, the terminal seat 7 has an upper surface 7a, a lower surface 7b, and one side surface 7c having a substantially U-shaped cross section. A lock spring 8 is disposed on the terminal seat 7. The lock spring 8 has a role of fixing a conductor connected to the load-side terminal 5 of the circuit breaker 1, and includes a fixing portion 8a, a retaining portion 8b, and a bottom portion 8c. The fixing portion 8 a is biased toward the upper surface 7 a of the terminal seat 7 in order to securely fix the conductor to the load side terminal 5. Further, the retaining portion 8b is biased toward the terminal port 9 in order to prevent the conductor once connected from falling off.

端子座７には、鎖錠ばね８の変形を抑えるため、制限手段を設けている。具体的には、保持突起１０を設け、この保持突起１０に対向する凹部１１ａを形成した押さえ板１１を保持突起１０に係止させる。端子座７の下面７ｂと保持突起１０に係止された押さえ板１１との間に鎖錠ばね８を組み付ける。鎖錠ばね８は端子座７に押さえ板１１を介して保持突起１０により浮き上がらないように押さえられる。 The terminal seat 7 is provided with a restricting means for suppressing deformation of the lock spring 8. Specifically, the holding projection 10 is provided, and the pressing plate 11 having the recess 11 a facing the holding projection 10 is locked to the holding projection 10. The locking spring 8 is assembled between the lower surface 7 b of the terminal seat 7 and the holding plate 11 locked to the holding projection 10. The locking spring 8 is pressed against the terminal seat 7 by the holding projection 10 via the holding plate 11 so as not to be lifted.

導体は、端子座７に対して平行に差し込むことで、鎖錠ばね８の付勢が十分有効に利用できる。端子座７の底面７ｃに向かって鎖錠ばね８を押し付けるような角度で導体が端子口９へ差し込まれた場合、鎖錠ばね８に所定量以上の負荷がかかることになり、ばねの弾性を維持することが困難である場合もあった。そこで、保持突起１０を設けることで、導体を確実に負荷側端子７に固定すると共に、鎖錠ばね８に所定量以上の力が加わった場合にも、ばねの弾性が損なわれないようになっている。 By inserting the conductor in parallel with the terminal seat 7, the biasing force of the lock spring 8 can be used sufficiently effectively. When the conductor is inserted into the terminal port 9 at such an angle that the locking spring 8 is pressed toward the bottom surface 7c of the terminal seat 7, a load of a predetermined amount or more is applied to the locking spring 8, and the elasticity of the spring is increased. In some cases, it was difficult to maintain. Therefore, by providing the holding projection 10, the conductor is securely fixed to the load-side terminal 7, and even when a predetermined amount of force is applied to the locking spring 8, the elasticity of the spring is not impaired. ing.

また、導体が鎖錠ばね８を必要以上に端子座７の底面７ｃへ押し付けるような角度で端子口９に導入された場合、鎖錠ばね８の端子口９側が浮き上がってしまうため、本発明では、端子座７の側面の、鎖錠ばね８の底辺部８ｃを端子座７の底面７ｃに押さえつける位置に、保持突起１２を設け、鎖錠ばね８の位置を、導体の差し込み角度に関わらず保持できるようにした。 Further, when the conductor is introduced into the terminal port 9 at an angle that pushes the lock spring 8 more than necessary against the bottom surface 7c of the terminal seat 7, the terminal port 9 side of the lock spring 8 is lifted. The holding projection 12 is provided on the side surface of the terminal seat 7 at a position where the bottom 8c of the locking spring 8 is pressed against the bottom surface 7c of the terminal seat 7, and the position of the locking spring 8 is maintained regardless of the insertion angle of the conductor. I was able to do it.

回路遮断器のオン状態の断面図である。It is sectional drawing of the ON state of a circuit breaker. 回路遮断器のオフ状態の断面図である。It is sectional drawing of the OFF state of a circuit breaker. 端子座と鎖錠ばねを示す分解斜視図である。It is a disassembled perspective view which shows a terminal seat and a locking spring. 図３における端子座と鎖錠ばねとを組み付けた状態を示す説明図である。It is explanatory drawing which shows the state which assembled | attached the terminal seat and locking spring in FIG. 図４における端子座の説明図である。It is explanatory drawing of the terminal seat in FIG.

Explanation of symbols

１回路遮断器
２電源側端子
３固定接触子
４可動接触子
５負荷側端子
６ハンドルユニット
７端子座
７ａ上面
７ｂ下面
７ｃ側面
８鎖錠ばね
８ａ固定部
８ｂ抜け止め部
８ｃ底辺部
９端子口
１０保持突起
１１押さえ板
１１ａ凹部 DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Power supply side terminal 3 Fixed contact 4 Movable contact 5 Load side terminal 6 Handle unit 7 Terminal seat 7a Upper surface 7b Lower surface 7c Side surface 8 Locking spring 8a Fixed part 8b Retaining part 8c Bottom part 9 Terminal port 10 Holding projection 11 Holding plate 11a Recess

Claims

A terminal structure of a circuit breaker having a lock spring in a terminal portion and having a quick connection terminal for connecting a conductor to the terminal portion by an urging force of the lock spring, the lock spring fixing the conductor Therefore, the fixing portion urged to the conductor and a retaining portion urged to the conductor introduction portion of the terminal portion to prevent the conductor from falling off, the locking spring is a terminal seat A terminal structure of a circuit breaker, wherein the terminal structure is held on a bottom surface of a terminal seat by a pressing plate that can be locked to a holding projection provided on the terminal.

2. The circuit breaker terminal according to claim 1, wherein the holding protrusion is formed at a position where the bottom side of the lock spring can be pressed against the bottom surface of the terminal seat via the pressing plate. Construction.