JP7289231B2

JP7289231B2 - circuit breaker

Info

Publication number: JP7289231B2
Application number: JP2019130059A
Authority: JP
Inventors: 裕明加藤; 佑太山中
Original assignee: 河村電器産業株式会社
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2023-06-09
Anticipated expiration: 2039-07-12
Also published as: JP2021015725A

Description

本開示は、回路遮断器に関する。 The present disclosure relates to circuit breakers.

回路遮断器において、固定接点と可動接点とが離れる際にアークが発生する。アークが発生した場合、可及的速やかに消弧することが好ましい。この観点から下記特許文献１に記載の回路遮断器が提案されている。 In a circuit breaker, an arc occurs when the stationary and moving contacts separate. When an arc occurs, it is preferable to extinguish the arc as quickly as possible. From this point of view, a circuit breaker described in Patent Document 1 below has been proposed.

下記特許文献１に記載されている回路遮断器は、可動接触子に設けられた可動接点が固定接触子に設けられた固定接点から開離する軌道近傍に消弧装置を配している。消弧装置は一定間隔で複数のグリッドを積層並設し、グリッド同士をアーク電流で溶断可能な導電部材で接続すると共に、一端を固定接触子に接触させている。 A circuit breaker described in Patent Document 1 below has an arc-extinguishing device near a track where a movable contact provided on a movable contact separates from a fixed contact provided on a fixed contact. In the arc extinguishing device, a plurality of grids are stacked side by side at regular intervals, and the grids are connected to each other by a conductive member that can be fused by an arc current, and one end of the grids is brought into contact with a fixed contact.

特開２０００－２４３２０７号公報JP-A-2000-243207

特許文献１に記載されている回路遮断器においても、発生したアークを消弧することが可能である。しかしながら、消弧装置の性能をより発揮させつつ、より迅速にアークを消弧することが求められている。 The circuit breaker described in Patent Document 1 can also extinguish the generated arc. However, it is required to extinguish the arc more quickly while exhibiting the performance of the arc extinguishing device more.

本開示は、消弧装置の性能をより発揮させつつ、より迅速にアークを消弧することが可能な回路遮断器を提供することを目的とする。 An object of the present disclosure is to provide a circuit breaker capable of extinguishing an arc more quickly while exhibiting the performance of an arc-extinguishing device.

本開示は、回路遮断器であって、固定接点が設けられている固定接触子と、固定接点と接触又は離隔するように動く可動接点が設けられた可動接触子と、可動接点が固定接点と接触する導通状態と接触しない非導通状態との間を遷移するように、可動接触子を駆動する機構部と、導通状態から非導通状態に遷移する際に発生するアーク放電の消滅を促進させる消弧装置と、を備え、固定接点と可動接点とが接触する導通箇所と消弧装置との間に、可動接点と同電位になるようにアーク伝達部が設けられている。 The present disclosure is a circuit breaker comprising a fixed contact provided with a fixed contact, a movable contact provided with a movable contact that moves in contact with or away from the fixed contact, and the movable contact with the fixed contact. A mechanical part that drives the movable contact so as to transition between a conducting state that contacts and a non-conducting state that does not contact, and an extinguisher that promotes extinction of arc discharge generated when the conducting state transitions to the non-conducting state. An arc device is provided, and an arc transmission part is provided between the arc-extinguishing device and a conducting portion where the fixed contact and the movable contact are in contact so that the potential is the same as that of the movable contact.

本開示では、アーク伝達部が可動接点と同電位になるように設けられているので、アーク放電が発生した場合にアーク伝達部に向けてアーク放電が移行する。アーク伝達部は、導通箇所と消弧装置との間に設けられているので、導通箇所において固定接点から可動接点が離れたことによって発生するアーク放電を消弧装置に向けて移行させることができ、消弧装置の機能をより確実に発揮させることができる。 In the present disclosure, since the arc transfer section is provided to have the same potential as the movable contact, arc discharge transfers toward the arc transfer section when arc discharge occurs. Since the arc transmission part is provided between the conducting part and the arc-extinguishing device, the arc discharge generated by the separation of the movable contact from the fixed contact at the conducting part can be transferred to the arc-extinguishing device. , the function of the arc-extinguishing device can be exhibited more reliably.

本開示によれば、消弧装置の性能をより発揮させつつ、より迅速にアークを消弧することが可能な回路遮断器を提供することができる。 ADVANTAGE OF THE INVENTION According to this indication, the circuit breaker which can extinguish an arc more rapidly can be provided, demonstrating the performance of an arc-extinguishing device more.

図１は、本実施形態における回路遮断器を説明するための断面図である。FIG. 1 is a cross-sectional view for explaining a circuit breaker according to this embodiment. 図２は、本実施形態におけるアーク伝達部を説明するための図である。FIG. 2 is a diagram for explaining the arc transmission portion in this embodiment. 図３は、本実施形態の変形例における回路遮断器を説明するための断面図である。FIG. 3 is a cross-sectional view for explaining a circuit breaker in a modified example of this embodiment. 図４は、本実施形態の変形例における回路遮断器を説明するための斜視断面図である。FIG. 4 is a perspective cross-sectional view for explaining a circuit breaker in a modified example of this embodiment.

以下、添付図面を参照しながら本実施形態について説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。 Hereinafter, this embodiment will be described with reference to the accompanying drawings. In order to facilitate understanding of the description, the same constituent elements in each drawing are denoted by the same reference numerals as much as possible, and overlapping descriptions are omitted.

図１は、本実施形態における回路遮断器１０を説明するための断面図である。回路遮断器１０は、例えば電源と負荷との間を接続する電路上に設けられ、電路の導通及び遮断を切り替える装置である。図１に示されるように、回路遮断器１０は、第１ハウジング部２１と、第２ハウジング部２２と、電源側端子座３と、負荷側端子座４と、固定接触子５と、可動接触子６と、ハンドル２４と、消弧装置７と、アーク伝達部８と、機構部９と、を備えている。 FIG. 1 is a cross-sectional view for explaining a circuit breaker 10 according to this embodiment. The circuit breaker 10 is a device that is provided, for example, on an electric line that connects between a power source and a load, and switches between conducting and breaking of the electric line. As shown in FIG. 1, the circuit breaker 10 includes a first housing portion 21, a second housing portion 22, a power supply side terminal seat 3, a load side terminal seat 4, a fixed contact 5, and a movable contact. It is provided with an element 6 , a handle 24 , an arc extinguishing device 7 , an arc transmission section 8 and a mechanism section 9 .

回路遮断器１０のハウジングは、第１ハウジング部２１及び第２ハウジング部２２に加えて、図示しないカバーとしての第３ハウジング部を組み合わせることで構成される。図１は、カバーとしての第３ハウジング部を取り外し、基台としての第１ハウジング部２１及び第２ハウジング部２２を示したものである。 The housing of the circuit breaker 10 is configured by combining the first housing portion 21 and the second housing portion 22 with a third housing portion as a cover (not shown). FIG. 1 shows the first housing part 21 and the second housing part 22 as a base with the third housing part as a cover removed.

第１ハウジング部２１及び第２ハウジング部２２には、電源側端子座３と、負荷側端子座４と、固定接触子５と、可動接触子６と、ハンドル２４と、消弧装置７と、アーク伝達部８と、が収容されている。 The first housing portion 21 and the second housing portion 22 include a power supply side terminal seat 3, a load side terminal seat 4, a fixed contact 5, a movable contact 6, a handle 24, an arc extinguishing device 7, The arc transmission part 8 is accommodated.

第１ハウジング部２１及び第２ハウジング部２２は、第１壁部２０１と、第２壁部２０２と、第３壁部２０３とを有している。第１壁部２０１と第２壁部２０２とは、互いに対向するように配置されている。第３壁部２０３は、第１壁部２０１と第２壁部２０２とを繋ぐように設けられている。 The first housing portion 21 and the second housing portion 22 have a first wall portion 201 , a second wall portion 202 and a third wall portion 203 . The first wall portion 201 and the second wall portion 202 are arranged to face each other. The third wall portion 203 is provided so as to connect the first wall portion 201 and the second wall portion 202 .

回路遮断器１０が、分電盤のベース板といった取り付け部分に取り付けられた場合に、第１壁部２０１は電路の電源側に配置され、第２壁部２０２は電路の負荷側に配置され、第３壁部２０３はベース板側に配置される。 When the circuit breaker 10 is attached to a mounting portion such as a base plate of a distribution board, the first wall portion 201 is arranged on the power supply side of the electric circuit, the second wall portion 202 is arranged on the load side of the electric circuit, The third wall portion 203 is arranged on the base plate side.

電源側端子座３は、第２ハウジング部２２の電源側取付部２２１に取り付けられている。電源側端子座３は、第１壁部２０１において、第１ハウジング部２１及び第２ハウジング部２２の外部に露出するように配置されている。 The power supply side terminal seat 3 is attached to the power supply side attachment portion 221 of the second housing portion 22 . The power supply side terminal seat 3 is arranged on the first wall portion 201 so as to be exposed to the outside of the first housing portion 21 and the second housing portion 22 .

電源側端子座３には、ねじ３２によって圧着端子３３が取り付けられている。圧着端子３３は、電源側の外部配線が繋がっている。 A crimp terminal 33 is attached to the power supply side terminal seat 3 with a screw 32 . The crimp terminal 33 is connected to an external wiring on the power supply side.

固定接触子５は、電源側端子座３と同一平面を形成するように、導電性の板状の金属部材により一体的に設けられている。固定接点５１は、固定接触子５の電源側端子座３とは反対側の端部に設けられている。固定接点５１は、可動接触子６の一端に設けられた可動接点６１の移動軌道上に設けられている。 The stationary contactor 5 is integrally provided with a conductive plate-like metal member so as to form the same plane as the power supply side terminal seat 3 . The fixed contact 51 is provided at the end of the fixed contact 5 opposite to the power supply side terminal seat 3 . The fixed contact 51 is provided on a movement track of a movable contact 61 provided at one end of the movable contact 6 .

負荷側端子座４は、第２ハウジング部２２の負荷側取付部２２２に取り付けられている。負荷側端子座４は、第２壁部２０２において、第１ハウジング部２１及び第２ハウジング部２２の外部に露出するように配置されている。 The load-side terminal seat 4 is attached to the load-side attachment portion 222 of the second housing portion 22 . The load-side terminal seat 4 is arranged on the second wall portion 202 so as to be exposed to the outside of the first housing portion 21 and the second housing portion 22 .

負荷側端子座４には、ねじ４２によって圧着端子４３が取り付けられている。圧着端子４３は、負荷側の外部配線が繋がっている。 A crimp terminal 43 is attached to the load-side terminal seat 4 with a screw 42 . The crimp terminal 43 is connected to external wiring on the load side.

可動接触子６は、電路を導通及び遮断するために第１ハウジング部２１及び第２ハウジング部２２の内部に設けられている可動部品である。ハンドル２４は、可動接触子６を操作するために設けられている可動部品である。 The movable contactor 6 is a movable component provided inside the first housing portion 21 and the second housing portion 22 for conducting and interrupting the electric circuit. A handle 24 is a movable part provided for operating the movable contactor 6 .

可動接触子６は、内部配線を通じて負荷側端子座４に電気的に接続されている。可動接触子６は、一端に可動接点６１が形成されている。可動接触子６は、他端を軸としてハンドル２４の手動操作や、機構部９の作動に基づいて揺動する。可動接触子６が揺動することにより、可動接点６１が固定接点５１に対して接触及び離隔する。 The movable contactor 6 is electrically connected to the load-side terminal seat 4 through internal wiring. A movable contact 61 is formed at one end of the movable contact 6 . The movable contactor 6 swings about the other end as an axis when the handle 24 is manually operated or the mechanism section 9 is operated. As the movable contactor 6 swings, the movable contact 61 contacts and separates from the fixed contact 51 .

可動接点６１が固定接点５１と接触しているとき、可動接触子６は、固定接触子５と略平行に保持される。可動接点６１が固定接点５１から離れているとき、可動接触子６は、図１に示される遮断位置において保持される。 When the movable contact 61 is in contact with the fixed contact 51 , the movable contact 6 is held substantially parallel to the fixed contact 5 . When the movable contact 61 is separated from the fixed contact 51, the movable contact 6 is held in the breaking position shown in FIG.

第１ハウジング部２１及び第２ハウジング部２２の内部には、排気通路２２３が設けられている。排気通路２２３は、可動接点６１が固定接点５１から離れる際に発生するアークガスを外部に排気するための通路である。第１壁部２０１には、排気通路２２３が外部に連通する排気口２０１ａが設けられている。 An exhaust passage 223 is provided inside the first housing portion 21 and the second housing portion 22 . The exhaust passage 223 is a passage for exhausting arc gas generated when the movable contact 61 separates from the fixed contact 51 to the outside. The first wall portion 201 is provided with an exhaust port 201a through which the exhaust passage 223 communicates with the outside.

消弧装置７は、第１ハウジング部２１及び第２ハウジング部２２内において、アークガスの排気通路２２３に設けられている。消弧装置７は、複数のグリッドを有しており、アークガスを消弧する。 The arc extinguishing device 7 is provided in the arc gas exhaust passage 223 in the first housing portion 21 and the second housing portion 22 . The arc-extinguishing device 7 has a plurality of grids and extinguishes the arc gas.

本実施形態における回路遮断器１０は、固定接点５１が設けられている固定接触子５と、固定接点５１と接触又は離隔するように動く可動接点６１が設けられた可動接触子６と、可動接点６１が固定接点５１と接触する導通状態と接触しない非導通状態との間を遷移するように、可動接触子６を駆動する機構部９と、導通状態から非導通状態に遷移する際に発生するアーク放電の消滅を促進させる消弧装置７と、を備え、固定接点５１と可動接点６１とが接触する導通箇所と消弧装置７との間に、可動接点６１と同電位になるようにアーク伝達部８が設けられている。 The circuit breaker 10 according to the present embodiment includes a fixed contact 5 provided with a fixed contact 51, a movable contact 6 provided with a movable contact 61 that moves so as to come into contact with or separate from the fixed contact 51, and a movable contact. 61 is in contact with the fixed contact 51 and the non-conducting state is not in contact with the fixed contact 51. and an arc-extinguishing device 7 that accelerates the extinction of the arc discharge, and between the arc-extinguishing device 7 and the conductive portion where the fixed contact 51 and the movable contact 61 are in contact, the arc is made to have the same potential as the movable contact 61. A transmission unit 8 is provided.

本開示では、アーク伝達部８が可動接点６１と同電位になるように設けられているので、アーク放電が発生した場合にアーク伝達部８に向けてアーク放電が移行する。アーク伝達部８は、導通箇所と消弧装置７との間に設けられているので、導通箇所において固定接点５１から可動接点６１が離れたことによって発生するアーク放電を消弧装置７に向けて移行させることができ、消弧装置７の機能をより確実に発揮させることができる。 In the present disclosure, the arc transmission portion 8 is provided so as to have the same potential as the movable contact 61 , so when arc discharge occurs, the arc discharge moves toward the arc transmission portion 8 . Since the arc transmission part 8 is provided between the conducting part and the arc extinguishing device 7, the arc discharge generated by the separation of the movable contact 61 from the fixed contact 51 at the conducting part is directed to the arc extinguishing device 7. Therefore, the function of the arc-extinguishing device 7 can be exhibited more reliably.

図１に示されるように、アーク伝達部８は、導通箇所に近接するアーク受取部分８１と、アーク受取部分８１に繋がり、消弧装置７に向かうアーク拡散部分８２とを有している。 As shown in FIG. 1 , the arc transfer section 8 has an arc receiving portion 81 adjacent to the conducting point and an arc spreading portion 82 connected to the arc receiving portion 81 and directed toward the arc extinguishing device 7 .

アーク受取部分８１は、導通箇所に近接するように設けられているので、導通箇所において固定接点５１から可動接点６１が離れたことによって発生するアーク放電を引き寄せることができる。アーク拡散部分８２は、アーク受取部分８１に繋がり消弧装置７の端部に向かうので、アーク受取部分８１が引き寄せたアーク放電を拡散しながら消弧装置７に向かわせることができる。 Since the arc receiving portion 81 is provided close to the conducting portion, it can attract the arc discharge generated by the moving contact 61 separating from the fixed contact 51 at the conducting portion. Since the arc diffusion part 82 is connected to the arc receiving part 81 and directed to the end of the arc extinguishing device 7 , the arc discharge drawn by the arc receiving part 81 can be diffused and directed to the arc extinguishing device 7 .

本実施形態において、機構部９は、少なくとも一対の第１外部端子としての電源側端子座３及び第２外部端子としての負荷側端子座４の間における導通が導通状態と非導通状態との間を遷移するように可動接触子６を駆動するものである。消弧装置７は、第１外部端子としての電源側端子座３側に設けられ、アーク伝達部８は、第２外部端子としての負荷側端子座４に電気的に繋がる接続部分（第１接続部分８３及び第２接続部分８４を含む）を有する。 In the present embodiment, the mechanical portion 9 is such that the electrical continuity between at least a pair of the power supply side terminal seat 3 as the first external terminal and the load side terminal seat 4 as the second external terminal is between the conducting state and the non-conducting state. , the movable contact 6 is driven so as to transition from . The arc extinguishing device 7 is provided on the side of the power supply side terminal seat 3 as the first external terminal, and the arc transmission portion 8 is a connection portion (first connection) electrically connected to the load side terminal seat 4 as the second external terminal. portion 83 and second connecting portion 84).

接続部分が第２外部端子としての負荷側端子座４に電気的に繋がっているので、接続部分が負荷側端子座４と同電位となり、アーク受取部分８１及びアーク拡散部分８２も負荷側端子座４と同電位とすることができるので、アーク放電の消弧装置７への移行をより確実に行うことができる。 Since the connection portion is electrically connected to the load side terminal seat 4 as the second external terminal, the connection portion has the same potential as the load side terminal seat 4, and the arc receiving portion 81 and the arc diffusion portion 82 are also at the load side terminal seat. 4, the arc discharge can be transferred to the arc-extinguishing device 7 more reliably.

本実施形態における回路遮断器１０は、更に、固定接触子５、可動接触子６、機構部９、消弧装置７、及びアーク伝達部８を内容するハウジングを備えている。ハウジングは、少なくとも第１ハウジング部２１と第２ハウジング部２２とを組み合わせることによって構成されている。第１ハウジング部２１及び第２ハウジング部２２は、開口部が設けられた有底容器状に形成されており、固定接触子５、可動接触子６、機構部９、消弧装置７、及びアーク伝達部８は、開口部から第１ハウジング部２１及び第２ハウジング部２２に組み付け可能なように構成されている。 The circuit breaker 10 in this embodiment further includes a housing containing the fixed contact 5 , the movable contact 6 , the mechanism section 9 , the arc extinguishing device 7 and the arc transmission section 8 . The housing is constructed by combining at least a first housing part 21 and a second housing part 22 . The first housing part 21 and the second housing part 22 are formed in the shape of a bottomed container provided with an opening, and include the fixed contact 5, the movable contact 6, the mechanism part 9, the arc extinguishing device 7, and the arc. The transmission portion 8 is configured to be attachable to the first housing portion 21 and the second housing portion 22 through the opening.

有底容器状の第１ハウジング部２１及び第２ハウジング部２２に設けられた開口部から、固定接触子５、可動接触子６、機構部９、消弧装置７、及びアーク伝達部８を組み付けることができるので、アーク伝達部８を有する回路遮断器１０を容易に組み立てることができる。 The fixed contactor 5, the movable contactor 6, the mechanism section 9, the arc extinguishing device 7, and the arc transmission section 8 are assembled through the openings provided in the bottomed container-shaped first housing section 21 and the second housing section 22. Therefore, the circuit breaker 10 having the arc transmitting portion 8 can be easily assembled.

アーク伝達部８は、第１ハウジング部２１に設けられている電源側固定壁２１１と負荷側固定壁２１２との間に収められている。電源側固定壁２１１は、電源側端子座３側に設けられている。負荷側固定壁２１２は、負荷側端子座４側に設けられている。 The arc transmission portion 8 is housed between a power supply side fixed wall 211 and a load side fixed wall 212 provided in the first housing portion 21 . The power supply side fixing wall 211 is provided on the power supply side terminal seat 3 side. The load-side fixed wall 212 is provided on the load-side terminal seat 4 side.

本実施形態において、機構部９は、少なくとも一対の第１外部端子としての電源側端子座３及び第２外部端子としての負荷側端子座４間における導通が導通状態と非導通状態との間を遷移するように可動接触子６を駆動するものであって、消弧装置７は第１外部端子としての電源側端子座３側に設けられている。アーク伝達部８は、第２外部端子としての負荷側端子座４に電気的に繋がる接続部分を有し、接続部分は、第１ハウジング部２１の底部に沿った第１接続部分８３と、底部から第２外部端子としての負荷側端子座４に延びる第２接続部分８４と、を有している。 In the present embodiment, the mechanical portion 9 is such that the electrical continuity between at least a pair of the power supply side terminal seat 3 as the first external terminal and the load side terminal seat 4 as the second external terminal is controlled between a conducting state and a non-conducting state. The arc-extinguishing device 7 is provided on the side of the power-supply-side terminal base 3 as the first external terminal, which drives the movable contactor 6 so as to make a transition. The arc transmission portion 8 has a connecting portion electrically connected to the load-side terminal seat 4 as a second external terminal, and the connecting portion includes a first connecting portion 83 along the bottom of the first housing portion 21 and a bottom and a second connection portion 84 extending from the load side terminal seat 4 as a second external terminal.

図２に示されるように、第２接続部分８４は、第２外部端子としての負荷側端子座４に対して付勢力が働くように第１接続部分８３に繋がれている。具体的には、図２（Ａ）に示されるように、無負荷状態では、第２接続部分８４が基準位置（図２（Ｂ）に示される位置）よりも外側に傾斜するようになっている。アーク伝達部８を第１ハウジング部２１に収めると、図２（Ａ）から図２（Ｂ）の状態に遷移し、第２接続部分８４が、第２外部端子としての負荷側端子座４に対して付勢力が働くように形成されている。 As shown in FIG. 2, the second connection portion 84 is connected to the first connection portion 83 so as to apply a biasing force to the load-side terminal seat 4 as the second external terminal. Specifically, as shown in FIG. 2(A), in the no-load state, the second connecting portion 84 is inclined outward from the reference position (the position shown in FIG. 2(B)). there is When the arc transmission portion 8 is housed in the first housing portion 21, the state transitions from FIG. 2A to FIG. It is formed so that an urging force acts against it.

アーク伝達部８を第１ハウジング部２１及び第２ハウジング部２２に組み付けると、第２外部端子である負荷側端子座４に対して第２接続部分８４が付勢されるように構成されているので、第２外部端子である負荷側端子座４と第２接続部分８４とを確実に当接させることができ、アーク伝達部８を確実に第２外部端子と同電位とすることができる。 When the arc transmission portion 8 is assembled to the first housing portion 21 and the second housing portion 22, the second connection portion 84 is biased against the load side terminal seat 4, which is the second external terminal. Therefore, the load-side terminal seat 4, which is the second external terminal, and the second connection portion 84 can be reliably brought into contact with each other, and the arc transmission portion 8 can be reliably brought to the same potential as the second external terminal.

本実施形態において、アーク伝達部は、第２外部端子である負荷側端子座４とハウジングを構成する第２ハウジング部２２との間に第２接続部分が挟み込まれることで保持されるように構成されてもよい。このように構成されるアーク伝達部８Ａについて、図３及び図４を参照しながら説明する。 In this embodiment, the arc transmission portion is held by sandwiching the second connection portion between the load side terminal seat 4, which is the second external terminal, and the second housing portion 22, which constitutes the housing. may be The arc transmission portion 8A configured in this manner will be described with reference to FIGS. 3 and 4. FIG.

図３は、アーク伝達部８Ａが設けられている回路遮断器１０Ａの断面図である。図４は、アーク伝達部８Ａが設けられている回路遮断器１０Ａの斜視断面図である。アーク伝達部８Ａは、アーク受取部分８１と、アーク拡散部分８２と、第１接続部分８３と、第２接続部分８４Ａと、を有している。アーク受取部分８１、アーク拡散部分８２、及び第１接続部分８３は、アーク伝達部８と同様である。 FIG. 3 is a cross-sectional view of a circuit breaker 10A provided with an arc transfer portion 8A. FIG. 4 is a perspective cross-sectional view of a circuit breaker 10A provided with an arc transmission portion 8A. The arc transmission portion 8A has an arc receiving portion 81, an arc spreading portion 82, a first connecting portion 83, and a second connecting portion 84A. The arc receiving portion 81 , the arc spreading portion 82 and the first connecting portion 83 are similar to the arc transmitting portion 8 .

第２接続部分８４Ａは、第１接続部分８３から負荷側取付部２２２に向かって立ち上がり、負荷側取付部２２２に沿うように折り曲げられている。第２接続部分８４Ａの折り曲げられた端部は、負荷側取付部２２２と負荷側端子座４との間に挟み込まれて保持されている。 The second connection portion 84A rises from the first connection portion 83 toward the load side mounting portion 222 and is bent along the load side mounting portion 222 . The bent end portion of the second connection portion 84A is sandwiched and held between the load-side mounting portion 222 and the load-side terminal seat 4 .

第２接続部分８４Ａが第２外部端子である負荷側端子座４と第２ハウジング部２２の負荷側取付部２２２との間に挟み込まれることで保持されるので、第２外部端子である負荷側端子座４と第２接続部分８４Ａとを確実に当接させることができ、アーク伝達部８Ａを確実に第２外部端子である負荷側端子座４と同電位とすることができる。 Since the second connection portion 84A is held by being sandwiched between the load-side terminal seat 4, which is the second external terminal, and the load-side mounting portion 222 of the second housing portion 22, the load side, which is the second external terminal, is held. The terminal seat 4 and the second connection portion 84A can be reliably brought into contact with each other, and the arc transmission portion 8A can be reliably set to the same potential as the load side terminal seat 4, which is the second external terminal.

本実施形態において、アーク伝達部８，８Ａは、ハウジングである第１ハウジング部２１及び第２ハウジング部２２に対して、絶縁性材料で構成された固定部材２５によって保持される。 In this embodiment, the arc transmission parts 8 and 8A are held by a fixing member 25 made of an insulating material to the first housing part 21 and the second housing part 22, which are housings.

ハウジングである第１ハウジング部２１及び第２ハウジング部２２に対するアーク伝達部８，８Ａの保持を、絶縁性材料で構成された固定部材２５によって行うので、アーク伝達部８，８Ａの電位に影響を与えることなく保持することができる。 Since the fixing member 25 made of an insulating material holds the arc transmitting portions 8 and 8A to the first housing portion 21 and the second housing portion 22, which are housings, the electric potential of the arc transmitting portions 8 and 8A is not affected. You can hold without giving.

本実施形態において、アーク伝達部８，８Ａは、導通箇所に近接するアーク受取部分８１と、消弧装置７の端部に向かうアーク拡散部分８２と、アーク受取部分８１から第２外部端子である負荷側端子座４に電気的に繋がる接続部分である第１接続部分８３及び第２接続部分８４，８４Ａと、を有し、固定部材２５は、接続部分としての第１接続部分８３をハウジングである第１ハウジング部２１及び第２ハウジング部２２との間に挟むことでアーク伝達部８，８Ａを保持する。 In this embodiment, the arc transmission parts 8, 8A are the arc receiving part 81 close to the conducting point, the arc spreading part 82 toward the end of the arc extinguishing device 7, and the arc receiving part 81 to the second external terminal. The fixing member 25 has a first connection portion 83 and second connection portions 84 and 84A, which are connection portions electrically connected to the load-side terminal seat 4, and the fixing member 25 includes the first connection portion 83 as the connection portion in the housing. The arc transmission parts 8 and 8A are held by being sandwiched between the first housing part 21 and the second housing part 22 .

接続部分としての第１接続部分８３を固定部材２５で挟むことで、アーク受取部分８１及びアーク拡散部分８２を固定部材２５で固定する必要が無くなり、アーク受取部分８１及びアーク拡散部分８２におけるアーク放電伝達機能を阻害せず、アーク放電の消弧装置７への移行をより確実に行うことができる。 By sandwiching the first connecting portion 83 as a connecting portion between the fixing members 25, the need to fix the arc receiving portion 81 and the arc diffusion portion 82 with the fixing member 25 is eliminated, and arc discharge in the arc receiving portion 81 and the arc diffusion portion 82 is eliminated. The transfer of the arc discharge to the arc extinguishing device 7 can be performed more reliably without hindering the transmission function.

本実施形態において、固定部材２５は、第１外部端子である電源側端子座３とハウジングである第１ハウジング部２１及び第２ハウジング部２２との間に挟み込まれることで保持される。 In the present embodiment, the fixing member 25 is held by being sandwiched between the power supply side terminal seat 3, which is the first external terminal, and the first housing portion 21 and the second housing portion 22, which are housings.

第１外部端子である電源側端子座３とハウジングである第１ハウジング部２１及び第２ハウジング部２２との間に挟み込むことで固定部材２５を保持するので、ハウジング部に対する部品の組み付けを利用し、新たな部材の追加をせずに保持することができる。 Since the fixing member 25 is held by being sandwiched between the power supply side terminal seat 3, which is the first external terminal, and the first housing portion 21 and the second housing portion 22, which are housings, assembly of parts to the housing portion is utilized. , can be maintained without adding new members.

本実施形態において、固定部材２５は、第１外部端子である電源側端子座３とハウジングである第１ハウジング部２１及び第２ハウジング部２２との間で、アーク受取部分８１を挟むように設けられるアーク伝達促進部２５１を有し、アーク伝達促進部２５１は、磁性体材料によって形成される金属部材を含んでいる。 In this embodiment, the fixing member 25 is provided so as to sandwich the arc receiving portion 81 between the power supply side terminal seat 3 which is the first external terminal and the first housing portion 21 and the second housing portion 22 which are housings. The arc transmission promoting portion 251 includes a metal member made of a magnetic material.

磁性体材料によって形成される金属部材を含むアーク伝達促進部２５１を、アーク受取部分８１を挟むように設けることで、発生したアーク放電をアーク受取部分８１側に引き込むことができる。 By providing the arc transmission promoting portion 251 including a metal member made of a magnetic material so as to sandwich the arc receiving portion 81, the generated arc discharge can be drawn into the arc receiving portion 81 side.

本実施形態において、固定部材２５は、アーク放電に伴って発生するアークガスを冷却するための消弧ガスを発生する材料によって形成されている。 In this embodiment, the fixing member 25 is made of a material that generates arc-extinguishing gas for cooling the arc gas generated by arc discharge.

アーク受取部分８１側に引き込んだアーク放電に対し、固定部材２５から消弧ガスを発生させることができるので、より確実に消弧機能を発揮させることができる。 Since the arc-extinguishing gas can be generated from the fixed member 25 against the arc discharge drawn to the arc receiving portion 81 side, the arc-extinguishing function can be exhibited more reliably.

以上、具体例を参照しつつ本実施形態について説明した。しかし、本開示はこれらの具体例に限定されるものではない。これら具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素およびその配置、条件、形状などは、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。上記説明では、第１外部端子を電源側端子座３と、第２外部端子を負荷側端子座４として説明したが、第１外部端子を負荷側端子座４とし、第２外部端子を電源側端子座３としてもよい。 The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Design modifications to these specific examples by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each specific example described above and its arrangement, conditions, shape, etc. are not limited to those illustrated and can be changed as appropriate. As long as there is no technical contradiction, the combination of the elements included in the specific examples described above can be changed as appropriate. In the above description, the first external terminal is the power supply side terminal seat 3 and the second external terminal is the load side terminal seat 4, but the first external terminal is the load side terminal seat 4 and the second external terminal is the power supply side. The terminal seat 3 may be used.

１０，１０Ａ：回路遮断器
２０１ａ：排気口
２１：第１ハウジング部
２２：第２ハウジング部
２２１：電源側取付部
２２２：負荷側取付部
２２３：排気通路
２５：固定部材
２５１：アーク伝達促進部
３：電源側端子座
４：負荷側端子座
５：固定接触子
５１：固定接点
６：可動接触子
６１：可動接点
７：消弧装置
８，８Ａ：アーク伝達部
８１：アーク受取部分
８２：アーク拡散部分
８３：第１接続部分
８４，８４Ａ：第２接続部分
９：機構部 10, 10A: Circuit breaker 201a: Exhaust port 21: First housing part 22: Second housing part 221: Power supply side mounting part 222: Load side mounting part 223: Exhaust passage 25: Fixing member 251: Arc transmission promoting part 3 : Power supply side terminal seat 4: Load side terminal seat 5: Fixed contact 51: Fixed contact 6: Movable contact 61: Movable contact 7: Arc extinguishing device 8, 8A: Arc transmission part 81: Arc receiving part 82: Arc diffusion Portion 83: First connecting portion 84, 84A: Second connecting portion 9: Mechanism

Claims

a stationary contact provided with a stationary contact;
a movable contact provided with a movable contact that moves to contact or separate from the fixed contact;
a mechanism unit that drives the movable contact so that the movable contact transitions between a conductive state in which the movable contact contacts the fixed contact and a non-conductive state in which the movable contact does not contact;
an arc-extinguishing device that promotes extinction of arc discharge that occurs when the conductive state transitions to the non-conductive state;
The mechanism unit drives the movable contact so that conduction between at least a pair of the first external terminal and the second external terminal transitions between the conducting state and the non-conducting state,
While the arc-extinguishing device is provided on the first external terminal side,
An arc transmission part is provided between the arc-extinguishing device and a conducting portion where the fixed contact and the movable contact are in contact so that the potential is the same as that of the movable contact,
The arc transmission portion has an arc receiving portion adjacent to the conducting portion, an arc diffusion portion connected to the arc receiving portion and directed toward the arc extinguishing device, and a connecting portion electrically connected to the second external terminal. A circuit breaker characterized by :

a stationary contact provided with a stationary contact;
a movable contact provided with a movable contact that moves to contact or separate from the fixed contact;
a mechanism unit that drives the movable contact so that the movable contact transitions between a conductive state in which the movable contact contacts the fixed contact and a non-conductive state in which the movable contact does not contact;
an arc-extinguishing device that promotes extinction of arc discharge that occurs when the conductive state transitions to the non-conductive state;
An arc transmission part is provided between the arc-extinguishing device and a conducting portion where the fixed contact and the movable contact are in contact so that the potential is the same as that of the movable contact,
Furthermore, a housing containing the fixed contact, the movable contact, the mechanism section, the arc extinguishing device, and the arc transmission section is provided,
The housing is formed in the shape of a bottomed container provided with an opening,
The circuit breaker, wherein the fixed contact, the movable contact, the mechanical portion, the arc extinguishing device, and the arc transmission portion are configured to be assembled to the housing through the opening. .

A circuit breaker according to claim 2 ,
The mechanism unit drives the movable contact so that conduction between at least a pair of the first external terminal and the second external terminal transitions between the conducting state and the non-conducting state,
The arc-extinguishing device is provided on the first external terminal side,
The arc transmission part has a connection part electrically connected to the second external terminal,
the connecting portion has a first connecting portion along the bottom of the housing and a second connecting portion extending from the bottom to the second external terminal;
The second connection portion is connected to the first connection portion so as to exert a biasing force on the second external terminal.

A circuit breaker according to claim 3 ,
The arc transmission portion is held by sandwiching the second connection portion between the second external terminal and the housing.

A circuit breaker according to any one of claims 2 to 4 ,
The arc transmission portion is held with respect to the housing by a fixed member made of an insulating material.

A circuit breaker according to claim 5 ,
The arc transmission portion includes an arc receiving portion adjacent to the conducting portion, an arc spreading portion toward the end of the arc extinguishing device, a connection portion electrically connecting the arc receiving portion to the second external terminal, has
The fixing member holds the arc transmission portion by sandwiching the connecting portion with the housing.

A circuit breaker according to claim 6 ,
The fixing member is held by being sandwiched between the first external terminal and the housing.

A circuit breaker according to claim 7 ,
The fixing member has an arc transmission promoting portion provided between the first external terminal and the housing so as to sandwich the arc receiving portion,
The arc transmission promoting portion includes a metal member made of a magnetic material.

A circuit breaker according to claim 8 ,
The fixing member is made of a material that generates arc-extinguishing gas for cooling arc gas generated by arc discharge.