JPH03205733A - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JPH03205733A JPH03205733A JP33490A JP33490A JPH03205733A JP H03205733 A JPH03205733 A JP H03205733A JP 33490 A JP33490 A JP 33490A JP 33490 A JP33490 A JP 33490A JP H03205733 A JPH03205733 A JP H03205733A
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- movable contact
- case
- connection section
- wire connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 54
- 230000037431 insertion Effects 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Breakers (AREA)
Abstract
Description
この発明は、配線用遮断器や漏電遮断器などの小形の回
路遮断器に関し、更に詳しくは開閉運動をする可動接触
子と固定側の接続板とを電気的に接続するための構戒に
関する。The present invention relates to a small circuit breaker such as a molded case circuit breaker or an earth leakage breaker, and more particularly to a structure for electrically connecting a movable contact that moves to open and close to a fixed connection plate.
上記回路遮断器において、ケースに固定された固定接触
子に対して開閉運動をする可動接触子と、この可動接触
子を挟んで固定接触子の反対側でケースに固定され過電
流検出部に接続された接続板とは、一般に可撓性のリー
ド線で接続されている。
リード線としては銅の細い素線からなる撚線が使用され
る。
その場合、例えば実開昭５７−１９４２３７号公報にも
記載されているように、接続板のリード線接続部は可動
接触子の長手線上に配置され、両端がそれぞれ可動接触
子及び接続板のリード線接続部に接合されたリード線も
同一線上に置かれるのが普通である。In the above circuit breaker, there is a movable contact that opens and closes with respect to a fixed contact fixed to the case, and a movable contact that is fixed to the case on the opposite side of the fixed contact across the movable contact and connected to the overcurrent detection section. The connected connection plate is generally connected with a flexible lead wire. Twisted wires made of thin copper wires are used as lead wires. In that case, for example, as described in Japanese Utility Model Application No. 57-194237, the lead wire connection portion of the connection plate is arranged on the longitudinal line of the movable contact, and both ends are connected to the movable contact and the lead of the connection plate, respectively. The lead wires joined to the wire connections are also typically placed on the same line.
このようなリード線は可動接触子の開閉運動に伴って移
動変形し、可動接触子に抵抗力を及ぼすとともに、自身
は曲げ荷重を繰り返して受ける。
この抵抗力は可動接触子の開閉速度に影響を与え、また
リード線の大きな変形は疲労による破断を招く恐れがあ
る。したがって、リード線にはできるだけ弛みを与えて
撓み性を良好にするとともに、リード線を収容する空間
にも余裕を持たせてその移動や変形を妨げないようにす
る必要がある。
ところが、従来の回路遮断器においては、可動接触子、
リード線及び接続板のリード線接続部が縦列配置される
ため、上記余裕を持たせようとするとケースの長千寸法
が大きくなり、回路遮断器の小形化が困難であった。長
手寸法を無理に小さくしようとすると、開閉動作の際に
リード線を変形させる力が過大となり、開閉機構の投入
ばねの力がそれに勝てずに投入不良を発生する恐れも生
じる。
そこで、この発明はリード線の接続構或に工夫を講じて
、リード線の収容スペースの縮小化を図り、同時に可動
接触子に対する抵抗を小さくして安定した開閉性能が得
られるようにた回路遮断器を提供することを目的とする
ものである。Such a lead wire moves and deforms with the opening and closing movements of the movable contact, exerts a resistance force on the movable contact, and is repeatedly subjected to bending loads. This resistance affects the opening/closing speed of the movable contact, and large deformation of the lead wire may lead to breakage due to fatigue. Therefore, it is necessary to give the lead wire as much slack as possible to improve its flexibility, and also to provide a space for accommodating the lead wire so as not to impede its movement or deformation. However, in conventional circuit breakers, movable contacts,
Since the lead wires and the lead wire connection portions of the connection plate are arranged in tandem, attempting to provide the above margin increases the length of the case, making it difficult to downsize the circuit breaker. If the longitudinal dimension is forcibly reduced, the force that deforms the lead wire during opening and closing operations becomes excessive, and the force of the closing spring of the opening and closing mechanism may not be able to overcome this force, resulting in a closing failure. Therefore, the present invention has devised a lead wire connection structure to reduce the lead wire housing space, and at the same time reduce the resistance to the movable contact so as to achieve stable switching performance. The purpose is to provide equipment.
上記目的を達或するために、この発明は、ケースに固定
された固定接触子に対して開閉運動をする可動接触子と
前記ケースに固定された接続板とが可撓性のリード線で
電気的に接続された回路遮断器において、接続板のリー
ド線接続部を可動接触子の側方に位置させ、このリード
線接続部と前記可動接触子とをリード線をＵ字状にして
接続するものとする。In order to achieve the above object, the present invention provides a movable contact that opens and closes with respect to a fixed contact fixed to a case, and a connecting plate fixed to the case, which is connected to a flexible lead wire to conduct electricity. In a circuit breaker that is connected to a circuit breaker, the lead wire connection portion of the connection plate is located on the side of the movable contact, and the lead wire connection portion and the movable contact are connected by making the lead wire into a U-shape. shall be taken as a thing.
接続板のリード線接続部を可動接触子の側方に位置させ
るので、可動接触子と接続板との長手方向の間隔がほと
んど不要となる。また、可動接触子の開閉運動によるリ
ード線の変形は捩じり変形になるので、曲げ変形に比べ
て抵抗が小さく、更にリード線の上下移動量も少なくな
る。Since the lead wire connection portion of the connection plate is located on the side of the movable contact, there is almost no need for a longitudinal spacing between the movable contact and the connection plate. Further, since the deformation of the lead wire due to the opening/closing movement of the movable contactor results in torsional deformation, the resistance is lower than that of bending deformation, and furthermore, the amount of vertical movement of the lead wire is also reduced.
第１図はこの発明による３極構威の回路遮断器の実施例
を示すもので、図は閉路状態における中央極部分の縦断
面図である。また、第２図はその可動接触子部分の平面
図、第３図は同じく開路状態における可動接触子部分の
縦断面図である。
第１図において、ｌはモールド樹脂のケース、２は同じ
くカバー、３はケース１に図示しないねじで締め付けら
れ固定接点３ａを備えた固定接触子、４は可動接点４ａ
を備えた可動接触子、５は軸６を介して可動接触子４を
保持する樹脂製のホルダ、７は一端が可動接触子４に溶
接されたリード線、８は図示しないねじでケースｌに締
め付けられ、リード線接続部８ａにリード線７の他端が
溶接された接続板、９はヒータ導体９ａとこれに溶接さ
れたバイメタル９ｂとからなり、ヒータ導体９ａのＬ曲
げされた基部で接続板８に接続された過電流検出部、１
０はヒータ導体９ａに溶接された負荷側の端子板である
。接続板８とヒータ導体９ａとは一体に形威してもよい
。
図示閉路状態において、電流は電源側の端子板を兼ねた
固定接触子３から、固定接点３ａ、可動接点４ａ、可動
接触子４、リード線７、接続板８、ヒータ導体９ａを経
て端子板１０に流れる。
ホルダ５は第ｌ図に破線で断面形状を示した開閉軸１１
で各極同士が一体に連結され、この開閉軸１１を介して
ケース１に回動自在に支持されている。図示しないが、
ホルダ５と可動接触子４との間には、可動接触子４を固
定接触子３に向かって付勢する接触ばねが挿入され、接
点３ａ，４ａ間に接触圧力を与えている。１２は開閉操
作をする操作ハンドルで、詳細には説明しないが操作ハ
ンドル１２とホルダ５との間には開閉機構１３が設けら
れており、操作ハンドル１２を第１図の状態から図の右
方向に開操作するとホルダ５は開閉軸１１を中心に図の
時計方向に回動して、第３図に示すように可動接触子４
を開離させる。
また、回路遮断器に過負荷電流が流れると、ヒータ導体
９ａの発熱によりバイメタル９ｂが図の左方向に湾曲し
、引外し機構１４をトリップ動作させて可動接触子を開
離させる。開離した可動接触子４を再び閉威させるには
、開操作した後はそのまま操作ハンドル１２を図の左方
向に閉操作し、トリップ動作のときは引外し機構１４を
リセットした上で、やはり操作ハンドル１２を閉操作す
る。
さて、図示の回路遮断器において、接続板８はケース１
にねじ締めされる基部８ｂの一側からリード線接続部８
ａが折り曲げにより立ち上げられたもので、この接続板
８は可動接触子４に近接して、リード線接続部８ａがそ
の側方に平行に位置するように配置されている。そして
、リード線７はＵ字状になるようにして、すでに述べた
ように両端が可動接触子４及び接続板８のリード線接続
部８ａにそれぞれ溶接されている。
このような構或によれば、リード線７は可動接触子４と
リード線接続部８ａとの間で横方向に弛みを与えられ、
長手方向にはリード線接続部７の挿入間隔がほとんど要
らなくなるので、ケース１に設けられるべきリード線７
の長手方向の収容スペースが僅かになる。また、可動接
触子４の開閉運動によるリード線７の変形は捩じり変形
であるため従来の曲げ変形に比べて変形が容易である。
したがって、リード線７の弛みに従来ほどの余裕を持た
せる必要がなく、横方向寸法が従来と同じケースにその
まま収容でき、また可動接触子４の開閉運動に伴うリー
ド線７の中央部分７ａの上下移動もほとんど生じないの
で、リード線７の周囲空間も従来より小さくできる。
更に、上記捩じり変形は曲げ変形に比べて抵抗力が小さ
く、かつその変動も少ないので、可動接触子４を従来よ
りも小さい力で操作でき、また開閉速度のばらつきも少
なくなる。
第４図は別の実施例を示す可動接触子部分の平面図で、
この場合はリード線接続部８ａが接続板８の両側に立ち
上げられ、２本のリード線７が対にして接続されている
。これにより、定格電流の大きい回路遮断器に対応でき
、また定格電流が同じなら１本当たりのリード線７を細
くできる。FIG. 1 shows an embodiment of a three-pole circuit breaker according to the present invention, and the figure is a longitudinal sectional view of the central pole portion in a closed circuit state. Further, FIG. 2 is a plan view of the movable contact portion, and FIG. 3 is a longitudinal sectional view of the movable contact portion in an open state. In FIG. 1, l is a molded resin case, 2 is also a cover, 3 is a fixed contact that is tightened to the case 1 with a screw (not shown) and is equipped with a fixed contact 3a, and 4 is a movable contact 4a.
5 is a resin holder that holds the movable contact 4 via a shaft 6, 7 is a lead wire whose one end is welded to the movable contact 4, and 8 is attached to the case l with a screw (not shown). The connection plate 9 is tightened and the other end of the lead wire 7 is welded to the lead wire connection part 8a, and the connection plate 9 is made up of a heater conductor 9a and a bimetal 9b welded to this, and is connected at the L-bent base of the heater conductor 9a. Overcurrent detection unit connected to plate 8, 1
0 is a terminal plate on the load side welded to the heater conductor 9a. The connection plate 8 and the heater conductor 9a may be integrally formed. In the illustrated closed circuit state, current flows from the fixed contact 3 that also serves as a terminal board on the power supply side, through the fixed contact 3a, the movable contact 4a, the movable contact 4, the lead wire 7, the connection plate 8, and the heater conductor 9a to the terminal plate 10. flows to The holder 5 has an opening/closing shaft 11 whose cross-sectional shape is shown by a broken line in FIG.
The respective poles are integrally connected and rotatably supported by the case 1 via this opening/closing shaft 11. Although not shown,
A contact spring that biases the movable contact 4 toward the fixed contact 3 is inserted between the holder 5 and the movable contact 4, and applies contact pressure between the contacts 3a and 4a. Reference numeral 12 denotes an operating handle for opening and closing operations.Although not explained in detail, an opening/closing mechanism 13 is provided between the operating handle 12 and the holder 5. When the opening operation is performed, the holder 5 rotates clockwise in the figure around the opening/closing shaft 11, and the movable contact 4 is rotated as shown in FIG.
to separate. Furthermore, when an overload current flows through the circuit breaker, the bimetal 9b bends to the left in the figure due to the heat generated by the heater conductor 9a, tripping the tripping mechanism 14 and separating the movable contact. To close the separated movable contact 4 again, after opening, simply close the operating handle 12 to the left in the figure, and when tripping, reset the tripping mechanism 14 and then close again. Close the operating handle 12. Now, in the illustrated circuit breaker, the connection plate 8 is connected to the case 1.
The lead wire connection portion 8 is screwed from one side of the base 8b to the
This connection plate 8 is placed in close proximity to the movable contact 4 such that the lead wire connection portion 8a is located parallel to the side thereof. The lead wire 7 has a U-shape, and both ends are welded to the movable contact 4 and the lead wire connection portion 8a of the connection plate 8, respectively, as described above. According to such a structure, the lead wire 7 is given slack in the lateral direction between the movable contactor 4 and the lead wire connecting portion 8a,
Since almost no insertion interval between the lead wire connection parts 7 is required in the longitudinal direction, the lead wires 7 to be provided in the case 1 are
The storage space in the longitudinal direction becomes small. Further, since the deformation of the lead wire 7 due to the opening/closing movement of the movable contactor 4 is torsional deformation, the deformation is easier than conventional bending deformation. Therefore, there is no need to allow the lead wire 7 as much slack as in the conventional case, and it can be housed in a case with the same lateral dimension as the conventional case. Since there is almost no vertical movement, the space around the lead wire 7 can also be made smaller than before. Furthermore, the torsional deformation has a smaller resistance force than the bending deformation, and its fluctuation is also smaller, so the movable contact 4 can be operated with a smaller force than before, and variations in opening/closing speed are also reduced. FIG. 4 is a plan view of a movable contact portion showing another embodiment,
In this case, the lead wire connection portions 8a are raised on both sides of the connection plate 8, and the two lead wires 7 are connected as a pair. This makes it possible to handle circuit breakers with large rated currents, and also allows the lead wire 7 to be made thinner for each lead wire 7 if the rated current is the same.
この発明によれば、可動接触子と接続板との間に長手方
向のリード線挿入間隔がほとんど不要となり、長手力向
のリード線収容スペースが従来の約半分となる。それと
同時に開閉動作時に可動接触子がリード線から受ける変
形抵抗が小さくなり、開閉速度が安定して遮断性能が向
上する。According to this invention, there is almost no need for a lead wire insertion interval in the longitudinal direction between the movable contactor and the connection plate, and the space for accommodating the lead wires in the longitudinal direction is approximately half that of the conventional one. At the same time, the deformation resistance that the movable contact receives from the lead wire during the opening/closing operation is reduced, the opening/closing speed is stabilized, and the breaking performance is improved.
図はこの発明の実施例を示し、第１図は回路遮断器の閉
路状態における中央極部分の縦断面図、第２図はその可
動接触子部分の平面図、第３図は第１図における可動接
触子部分の開路状態の側面図、第４図は別の実施例の可
動接触子部分の平面図である。
■・・・ケース、３・・・固定接触子、４・・・可動接
触子、７・・・リード線、８・・・接続板、８ａはリー
ド線接続部。The figures show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of the center pole portion of the circuit breaker in the closed state, Fig. 2 is a plan view of its movable contact portion, and Fig. 3 is the same as in Fig. 1. FIG. 4 is a side view of the movable contact portion in an open state, and FIG. 4 is a plan view of the movable contact portion of another embodiment. ■...Case, 3...Fixed contact, 4...Movable contact, 7...Lead wire, 8...Connection plate, 8a is lead wire connection part.
Claims (1)
する可動接触子と前記ケースに固定された接続板とが可
撓性のリード線で電気的に接続された回路遮断器におい
て、接続板のリード線接続部を可動接触子の側方に位置
させ、このリード線接続部と前記可動接触子とをリード
線をＵ字状にして接続したことを特徴とする回路遮断器
。1) In a circuit breaker in which a movable contact that opens and closes with respect to a fixed contact fixed to a case and a connection plate fixed to the case are electrically connected by a flexible lead wire, the connection A circuit breaker characterized in that a lead wire connecting portion of a plate is located on a side of a movable contact, and the lead wire connecting portion and the movable contact are connected with the lead wire in a U-shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000334A JP2583799B2 (en) | 1990-01-05 | 1990-01-05 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000334A JP2583799B2 (en) | 1990-01-05 | 1990-01-05 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03205733A true JPH03205733A (en) | 1991-09-09 |
| JP2583799B2 JP2583799B2 (en) | 1997-02-19 |
Family
ID=11470994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000334A Expired - Lifetime JP2583799B2 (en) | 1990-01-05 | 1990-01-05 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583799B2 (en) |
-
1990
- 1990-01-05 JP JP2000334A patent/JP2583799B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2583799B2 (en) | 1997-02-19 |
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