JPH0329873Y2 - - Google Patents
Info
- Publication number
- JPH0329873Y2 JPH0329873Y2 JP1982192495U JP19249582U JPH0329873Y2 JP H0329873 Y2 JPH0329873 Y2 JP H0329873Y2 JP 1982192495 U JP1982192495 U JP 1982192495U JP 19249582 U JP19249582 U JP 19249582U JP H0329873 Y2 JPH0329873 Y2 JP H0329873Y2
- Authority
- JP
- Japan
- Prior art keywords
- movable contact
- bimetal
- contact
- fixed
- closing mechanism
- 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.)
- Expired
Links
- 239000004020 conductor Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 3
- 230000000694 effects Effects 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
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Landscapes
- Breakers (AREA)
Description
【考案の詳細な説明】
この考案は回路しや断器に係り、特にその過電
流引きはずし装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to circuits and breakers, and particularly to improvements in overcurrent tripping devices.
従来、この種の回路しや断器は第１図に示すよ
うに構成されている。即ち、図において、１は絶
縁材からなるベース、２はこのベース１に載置さ
れた絶縁材からなるカバー、３は上記ベース１に
固着され、且つ一端に固定接点３ａを有した固定
接触子、４はこの固定接触子３の他端に固着され
た外部導体（図示せず）が接続できる一方の端
子、５は上記固定接点３ａに対して離接する可動
接点５ａを一端に有した弾性導電材よりなる可動
接触子、６はこの可動接触子５の他端に固着され
たバイメタル、７は上記可動接触子５とバイメタ
ル６を取付ねじ８により上記ベース１に固着する
固定支持部材、９は上記バイメタル６の自由端６
ａに対向して作動部９ａが配置され、且つ回動自
在に枢支された引きはずし杆、１０はこの引きは
ずし杆９の一端に固着された磁性材よりなる可動
鉄片、１１はこの可動鉄片１０に対向して上記バ
イメタル６に固着された固定鉄心、１２は外部導
体（図示せず）が接続できる他方の端子、１３は
この端子１２と上記バイメタル６の自由端６ａと
を接続する可撓銅より線、１４は上記引きはずし
杆９と常時係止された係止部材１４ａ及び押え板
１４ｂを有し、この押え板１４ｂを介して上記可
動接点５ａを固定接点３ａに離接する開閉機構、
１５はこの開閉機構１４に連結され、且つ回動自
在に枢支された絶縁材からなるハンドルである。 Conventionally, this type of circuit breaker has been constructed as shown in FIG. That is, in the figure, 1 is a base made of an insulating material, 2 is a cover made of an insulating material placed on the base 1, and 3 is a fixed contact fixed to the base 1 and having a fixed contact 3a at one end. , 4 is one terminal to which an external conductor (not shown) fixed to the other end of the fixed contact 3 can be connected, and 5 is an elastic conductor having a movable contact 5a at one end that comes into contact with and separates from the fixed contact 3a. 6 is a bimetal fixed to the other end of the movable contact 5; 7 is a fixed support member for fixing the movable contact 5 and the bimetal 6 to the base 1 with a mounting screw 8; 9 is a movable contact made of metal; Free end 6 of the above bimetal 6
A trip rod with an actuating portion 9a disposed opposite a and rotatably supported; 10 is a movable iron piece made of a magnetic material fixed to one end of the trip rod 9; 11 is this movable iron piece A fixed iron core is fixed to the bimetal 6 opposite to 10, 12 is the other terminal to which an external conductor (not shown) can be connected, and 13 is a flexible terminal for connecting the terminal 12 and the free end 6a of the bimetal 6. The copper stranded wire 14 has a locking member 14a and a holding plate 14b that are always locked with the tripping rod 9, and an opening/closing mechanism that connects and separates the movable contact 5a from the fixed contact 3a via the holding plate 14b.
A handle 15 is made of an insulating material and is connected to the opening/closing mechanism 14 and rotatably supported.
次に、従来の回路しや断器の動作について説明
する。即ち、第１図において、ハンドル１５を左
傾すると開閉機構１４の押え板１４ｂが下がるた
め、弾性を有した可動接触子５が押圧され可動接
点５ａが固定接点３ａに接合されるわけである。
次にハンドル１５を右傾すると開閉機構１４の押
え板１４ｂが上がり、弾性をもつているため可動
接触子５が元の位置に戻り、可動接点５ａが固定
接点３ａより開離される。一方、両接点３ａ，５
ａの接合状態で回路しや断器に定格値を越えた比
較的小さな過電流が流れると、バイメタル６が自
己のジユール発熱により温度上昇し湾曲するた
め、バイメタル６の自由端６ａが引きはずし杆９
の作動部９ａを押圧し、引きはずし杆９が時計方
向に回動される。従つて、開閉機構１４の係止部
材１４ａと引きはずし杆９との係止が解かれ、可
動接触子５の弾性力により開閉機構１４の押え板
１４ｂが押し上げられて可動接点５ａが固定接点
３ａより開離されるものである。この動作特性は
第２図の実線で示すように、電流が大きくなる
程、動作時間が早くなるいわゆる時延特性となつ
ている。次に、両接点３ａ，５ａの接合状態で回
路しや断器に短絡電流などの大きな過電流が流れ
ると、バイメタル６の湾曲を待たずして可動鉄片
１０が固定鉄心１１に瞬間的に吸引し、引きはず
し杆９が時計方向に回動され、上述と同様に、可
動接点５ａが固定接点３ａより開離されるもので
ある。この動作特性は第２図の点線で示すよう
に、瞬時特性となつている。このような時延特性
及び瞬時特性を有した回路しや断器は、電線を過
電流から保護するという観点からは非常に見合の
良いものである。ところが、従来の回路しや断器
は上述のような瞬時特性を得るために、可動鉄片
１０と固定鉄心１１及び複雑で大きな引きはずし
杆９を有しており、構造複雑で高価なものになる
という欠点があつた。 Next, the operation of the conventional circuit breaker will be explained. That is, in FIG. 1, when the handle 15 is tilted to the left, the holding plate 14b of the opening/closing mechanism 14 is lowered, so that the elastic movable contact 5 is pressed and the movable contact 5a is joined to the fixed contact 3a.
Next, when the handle 15 is tilted to the right, the presser plate 14b of the opening/closing mechanism 14 is raised, and since it has elasticity, the movable contact 5 returns to its original position, and the movable contact 5a is separated from the fixed contact 3a. On the other hand, both contacts 3a, 5
If a relatively small overcurrent exceeding the rated value flows through the circuit or disconnector in the connected state a, the temperature of the bimetal 6 will rise due to its own joule heat generation and it will bend, causing the free end 6a of the bimetal 6 to become tripped. 9
, and the trip lever 9 is rotated clockwise. Therefore, the locking member 14a of the opening/closing mechanism 14 and the tripping rod 9 are unlatched, and the elastic force of the movable contact 5 pushes up the holding plate 14b of the opening/closing mechanism 14, so that the movable contact 5a moves to the fixed contact 3a. It is more separated. As shown by the solid line in FIG. 2, this operating characteristic is a so-called time delay characteristic in which the larger the current, the faster the operating time. Next, when a large overcurrent such as a short circuit current flows through the circuit or disconnector while both contacts 3a and 5a are connected, the movable iron piece 10 is instantaneously attracted to the fixed iron core 11 without waiting for the bimetal 6 to bend. The trip lever 9 is then rotated clockwise, and the movable contact 5a is separated from the fixed contact 3a in the same manner as described above. This operating characteristic is an instantaneous characteristic, as shown by the dotted line in FIG. A circuit breaker having such time-delay characteristics and instantaneous characteristics is very advantageous from the viewpoint of protecting electric wires from overcurrent. However, in order to obtain the above-mentioned instantaneous characteristics, conventional circuit breakers have a movable iron piece 10, a fixed iron core 11, and a complicated and large tripping rod 9, resulting in a complicated and expensive structure. There was a drawback.
この考案は上記のような従来のものの欠点を除
去するためになされたもので、可動鉄片と固定鉄
片を廃止することにより、構造簡単で、且つ安価
な過電流引きはずし装置を有した回路しや断器を
提供しようとするものである。 This idea was made in order to eliminate the drawbacks of the conventional ones as described above, and by eliminating the movable iron piece and the fixed iron piece, it was possible to create a circuit with a simple structure and inexpensive overcurrent trip device. This is intended to provide a disconnection device.
以下、この考案の一実施例を図に従つて説明す
る。第３図〜第６図はいずれもこの考案の一実施
例を示すもので、第３図はその接点接合状態を、
第４図はその接点開離状態を、第５図及び第６図
はその過電流引きはずし装置の動作状態をそれぞ
れ示すものである。図において、１６は弾性導電
材よりなる可動接触子で、一端に固定接点３ａに
対して離接する可動接点１６ａを有している。上
記可動接触子１６の中間部には固定支持部材７に
固着される折曲部１６ｂが設けられている。更に
上記可動接触子１６の他端には、上記折曲部１６
ｂから段状に折り曲げて延出した延出部１６ｃが
設けられ、この延出部１６ｃにバイメタル６の一
端が固着されている。そして上記可動接触子１６
の折曲部１６ｂと上記バイメタル６とは、互いに
逆方向の電流が流れるように、ほぼ平行に対向し
て配置されている。 An embodiment of this invention will be described below with reference to the drawings. Figures 3 to 6 all show one embodiment of this invention, and Figure 3 shows the state of the contact connections.
FIG. 4 shows the contact open state, and FIGS. 5 and 6 show the operating states of the overcurrent tripping device. In the figure, 16 is a movable contact made of an elastic conductive material, and has a movable contact 16a at one end that comes into contact with and leaves the fixed contact 3a. A bent portion 16b fixed to the fixed support member 7 is provided at the intermediate portion of the movable contactor 16. Further, at the other end of the movable contactor 16, the bent portion 16 is provided.
An extending portion 16c is provided which extends from b in a stepped manner, and one end of the bimetal 6 is fixed to this extending portion 16c. And the movable contact 16
The bent portion 16b and the bimetal 6 are arranged substantially parallel to each other and face each other so that currents flow in opposite directions.
上記構成によれば、第３図に示すような両接点
３ａ，１６ａの接合状態で、回路しや断器に短絡
電流などの大きな過電流が流れると、可動接触子
１６の折曲部１６ｂとバイメタル６に流れる電流
が互いに逆方向のため、両者１６ｂ，６間に電磁
反発力が生じ、この電磁反発力は可動接触子１６
の折曲部１６ｂとバイメタル６間が開くように作
用するわけであるが、第５図に示すように、バイ
メタル６の支点部を支持している可動接触子１６
の延出部１６ｃが弾性をもつているため、この延
出部１６ｃがたわみながらバイメタル６の自由端
６ａが時計方向に回動される。従つて、従来のも
のと同様に、バイメタル６の自由端６ａが引きは
ずし杆９の作動部９ａを押圧し、引きはずし杆９
が時計方向に回動され、開閉機構１４の係止部材
１４ａと引きはずし杆９との係止が解かれ、可動
接触子１６の弾性力により開閉機構１４の押え板
１４ｂが押し上げられて可動接点１６ａが固定接
点３ａより開離されるものである。この動作は瞬
間的に動作するため、従来のものと同様に、第２
図の点線で示すような瞬時特性が得られる。この
ように、この考案の回路しや断器は可動接触子１
６の延出部１６ｃを設けるだけで瞬時特性が得ら
れ、従来のもののような可動鉄片１０固定鉄心１
１を必要とせず、また引きはずし杆９も構造簡単
で小形になるものである。次に、第３図に示すよ
うな両接点３ａ，１６ａの接合状態で、回路しや
断器に定格値を越えた比較的小さな過電流が流れ
た場合は、従来のものと同様に、バイメタル６が
湾曲し、バイメタル６の自由端６ａが引きはずし
杆９の作動部９ａを押圧し、引きはずし杆９が時
計方向に回動され、開閉機構１４の係止部材１４
ａと引きはずし杆９との係止が解かれて第６図に
示す状態となる。従つて、従来のものと同様に、
可動接触子１６の弾性力により開閉機構１４の押
え板１４ｂが押し上げられて第４図に示すように
可動接点１６ａが固定接点３ａより開離され、第
２図の実線で示すような時延特性が得られるもの
である。また、従来のものと同様に、ハンドル１
５を左傾すると第３図に示すように可動接点１６
ａが固定接点３ａに接合され、ハンドル１５を右
傾すると第４図に示すように可動接点１６ａが固
定接点３ａより開離されるものである。 According to the above configuration, when a large overcurrent such as a short circuit current flows through the circuit or disconnector in the connected state of both contacts 3a and 16a as shown in FIG. Since the currents flowing through the bimetal 6 are in opposite directions, an electromagnetic repulsive force is generated between the bimetal 6 and the movable contact 16.
As shown in FIG. 5, the movable contact 16 supporting the fulcrum of the bimetal 6
Since the extending portion 16c has elasticity, the free end 6a of the bimetal 6 is rotated clockwise while the extending portion 16c is deflected. Therefore, like the conventional one, the free end 6a of the bimetal 6 presses the actuating portion 9a of the tripping rod 9, and the tripping rod 9
is rotated clockwise, the locking member 14a of the opening/closing mechanism 14 is disengaged from the tripping rod 9, and the retaining plate 14b of the opening/closing mechanism 14 is pushed up by the elastic force of the movable contact 16 to close the movable contact. 16a is opened and separated from the fixed contact 3a. Since this operation is instantaneous, the second
Instantaneous characteristics as shown by the dotted line in the figure are obtained. In this way, the circuit breaker of this invention has a movable contact 1.
Instantaneous characteristics can be obtained by simply providing the extension portion 16c of 6, and the movable iron piece 10 fixed iron core 1 is
1 is not required, and the trip rod 9 is also simple in structure and small in size. Next, if a relatively small overcurrent exceeding the rated value flows through the circuit or disconnector when both contacts 3a and 16a are connected as shown in Fig. 3, the bimetallic 6 is bent, the free end 6a of the bimetal 6 presses the operating portion 9a of the tripping rod 9, the tripping rod 9 is rotated clockwise, and the locking member 14 of the opening/closing mechanism 14 is rotated.
The lock between a and the tripping rod 9 is released, resulting in the state shown in FIG. Therefore, like the conventional one,
The elastic force of the movable contact 16 pushes up the holding plate 14b of the opening/closing mechanism 14, and as shown in FIG. 4, the movable contact 16a is separated from the fixed contact 3a, resulting in a time delay characteristic as shown by the solid line in FIG. is obtained. Also, like the conventional one, the handle 1
5 is tilted to the left, the movable contact 16 appears as shown in FIG.
a is connected to the fixed contact 3a, and when the handle 15 is tilted to the right, the movable contact 16a is separated from the fixed contact 3a as shown in FIG.
なお、上記一実施例では可動接触子１６の他端
に段状に折り曲げて延出した延出部１６ｃを設け
た場合を示したが、第７図に示すように、可動接
触子１６の延出部１６ｃを折曲部１６ｂからその
まま直線状に延出した構成とし、バイメタル６を
段状に折り曲げてもよく、また、絶縁性を確保す
るため、可動接触子１６の折曲部１６とバイメタ
ル６との間に絶縁部材１７を設けてもよく、上記
一実施例と同様の効果を奏するものである。 In the above-mentioned embodiment, the extension portion 16c is provided at the other end of the movable contact 16 by being bent in a stepped manner, but as shown in FIG. The projecting portion 16c may be configured to extend straight from the bent portion 16b, and the bimetal 6 may be bent in a stepped manner.Also, in order to ensure insulation, the bent portion 16 of the movable contact 16 and the bimetal 6 may be bent in steps. 6, an insulating member 17 may be provided between the insulating member 17 and the insulating member 17, and the same effect as in the above embodiment can be obtained.
以上のように、この考案によれば、バイメタル
と可動接触子の一部が逆方向の電流が流れるよう
に互いに略平行に配置する構成にしたことによ
り、構造簡単で且つ安価な過電流引きはずし装置
を有した回路しや断器を得ることができるもので
ある。また、バイメタルの固着された可動接触子
の延出部はたわむようになつているので、それだ
けバイメタルの自由端の変位が大きくとれるとい
う効果もある。 As described above, according to this invention, by arranging the bimetal and part of the movable contact substantially parallel to each other so that current flows in opposite directions, overcurrent tripping is simple and inexpensive. It is possible to obtain a circuit or disconnector having a device. Furthermore, since the extending portion of the movable contact to which the bimetal is fixed is flexible, there is an effect that the free end of the bimetal can be displaced to a greater extent.
第１図及び第２図はいずれも従来の回路しや断
器を示すもので、第１図はその側断面図、第２図
はその特作特性図である。第３図〜第６図はいず
れもこの考案の一実施例を示すもので、第３図は
その接点接合状態を示す側断面図、第４図はその
接点開離状態を示す側断面図、第５図は大きな過
電流が流れた場合のその過電流引きはずし装置の
動作状態を示す側断面図、第６図は小さな過電流
が流れた場合のその過電流引きはずし装置の動作
状態を示す側断面図、第７図はこの考案の他の実
施例を示す要部側面図である。
図中、３ａは固定接点、６はバイメタル、６ａ
はバイメタルの自由端、７は固定支持部材、９は
引きはずし杆、１４は開閉機構、１４ａは係止部
材、１６は可動接触子、１６ａは可動接点、１６
ｂは折曲部、１６ｃは延出部、１７は絶縁部材で
ある。
なお、各図中、同一符号は同一または相当部分
を示す。
Both FIGS. 1 and 2 show a conventional circuit breaker, with FIG. 1 being a side sectional view thereof, and FIG. 2 being a special characteristics diagram thereof. 3 to 6 all show one embodiment of this invention, FIG. 3 is a side sectional view showing the contact in a connected state, FIG. 4 is a side sectional view showing the contact in an open state, Figure 5 is a side sectional view showing the operating state of the overcurrent trip device when a large overcurrent flows, and Figure 6 shows the operating state of the overcurrent tripping device when a small overcurrent flows. FIG. 7 is a side sectional view of main parts showing another embodiment of this invention. In the figure, 3a is a fixed contact, 6 is a bimetal, 6a
1 is a free end of bimetal, 7 is a fixed support member, 9 is a trip lever, 14 is an opening/closing mechanism, 14a is a locking member, 16 is a movable contact, 16a is a movable contact, 16
b is a bent portion, 16c is an extension portion, and 17 is an insulating member. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
を、中間部に折曲部を、他端に上記折曲部から
延出した延出部をそれぞれ有し、上記開閉機構
により上記可動接点を固定接点に対して離接す
る弾性導電材よりなる可動接触子、上記延出部
に一端が固着され、上記可動接触子の折曲部と
逆方向に電流が流れるよう上記折曲部とほぼ平
行に対向して配置されたバイメタル、このバイ
メタルの自由端に対向して配置され、上記開閉
機構の係止部材に常時係止し回動自在に支持さ
れた引きはずし杆、上記可動接触子の折曲部を
支持する固定支持部材を備え、所定値以上の過
電流が流れたとき、上記可動接触子の折曲部と
上記バイメタルとの間に生じる電磁反発力によ
り上記バイメタルの自由端が反折曲部方向に移
動し、これによつて上記引きはずし杆が回動さ
れて上記係止部材と引きはずし杆との係止が解
かれ、上記可動接点が固定接点から開離される
よう構成されたことを特徴とする回路しや断
器。 (2) 互いにほぼ平行に配置された上記可動接触子
とバイメタルとの間に絶縁部材を介在させたこ
とを特徴とする実用新案登録請求の範囲第１項
に記載の回路しや断器。[Claims for Utility Model Registration] (1) An opening/closing mechanism having a locking member, a movable contact at one end, a bent part in the middle, and an extension part extending from the bent part at the other end. and a movable contact made of an elastic conductive material that connects and separates the movable contact from the fixed contact by the opening/closing mechanism, one end of which is fixed to the extension, and a current flows in a direction opposite to the bent portion of the movable contact. A bimetal disposed facing the bending portion in a manner substantially parallel to the folded portion, and a puller disposed opposite the free end of the bimetal, permanently engaged with the locking member of the opening/closing mechanism and rotatably supported. A release rod includes a fixed support member that supports the bent portion of the movable contact, and an electromagnetic repulsion force is generated between the bent portion of the movable contact and the bimetal when an overcurrent of a predetermined value or more flows. As a result, the free end of the bimetal moves in the opposite direction of the bent portion, thereby rotating the tripping rod to release the engagement between the locking member and the tripping rod, and fixing the movable contact. A circuit breaker characterized in that it is configured to be disconnected from a contact point. (2) The circuit breaker according to claim 1 of the utility model registration, characterized in that an insulating member is interposed between the movable contact and the bimetal which are arranged substantially parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19249582U JPS5995555U (en) | 1982-12-18 | 1982-12-18 | circuit break |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19249582U JPS5995555U (en) | 1982-12-18 | 1982-12-18 | circuit break |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5995555U JPS5995555U (en) | 1984-06-28 |
| JPH0329873Y2 true JPH0329873Y2 (en) | 1991-06-25 |
Family
ID=30414250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19249582U Granted JPS5995555U (en) | 1982-12-18 | 1982-12-18 | circuit break |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5995555U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5610630B2 (en) * | 2011-01-25 | 2014-10-22 | パナソニック株式会社 | Circuit breaker |
| JP5610629B2 (en) * | 2011-01-25 | 2014-10-22 | パナソニック株式会社 | Circuit breaker |
| JP5971584B2 (en) * | 2012-04-09 | 2016-08-17 | パナソニックＩｐマネジメント株式会社 | Circuit breaker external trip device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550557B2 (en) * | 1977-06-11 | 1980-12-18 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52161463U (en) * | 1976-05-31 | 1977-12-07 | ||
| JPS5550557U (en) * | 1978-09-29 | 1980-04-02 |
-
1982
- 1982-12-18 JP JP19249582U patent/JPS5995555U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550557B2 (en) * | 1977-06-11 | 1980-12-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5995555U (en) | 1984-06-28 |
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