JPH0338926Y2 - - Google Patents
Info
- Publication number
- JPH0338926Y2 JPH0338926Y2 JP1983093226U JP9322683U JPH0338926Y2 JP H0338926 Y2 JPH0338926 Y2 JP H0338926Y2 JP 1983093226 U JP1983093226 U JP 1983093226U JP 9322683 U JP9322683 U JP 9322683U JP H0338926 Y2 JPH0338926 Y2 JP H0338926Y2
- Authority
- JP
- Japan
- Prior art keywords
- center piece
- bimetal
- side pieces
- present
- fixed
- 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
- 239000000463 material Substances 0.000 claims description 5
- 239000011888 foil Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Thermally Actuated Switches (AREA)
Description
【考案の詳細な説明】
本考案は過電流遮断装置、特に作動素子として
バイメタルを用いた過電流遮断装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overcurrent interrupting device, and particularly to an overcurrent interrupting device using a bimetal as an operating element.
従来、この種の装置に使用されているバイメタ
ル素子としては、バイメタル自体を湾曲させたり
部分的に絞り込んだりしたもの、或はバイメタル
自体には加工を加えずバイメタルを単なる短冊状
としておき、バネ等の部品を用いてスナツプアク
シヨンを持たせるようにしたものが知られてい
る。 Conventionally, the bimetal elements used in this type of device are those made by bending or partially narrowing the bimetal itself, or by leaving the bimetal itself in a simple strip shape without any processing, and using it as a spring, etc. It is known to have a snap action using parts of .
しかし乍ら、前者のものではバイメタルの加工
を作動特性のバラツキがなく均一に行なうことが
煩雑であるため材料費に比して遥かに高価な素子
となり、特に絞り込み型では型の条件が特性に大
きく影響し易い。又、後者のものではバネ等の部
品点数が多くななりやはりコスト高となる。更
に、これら両者のバイメタルの作動精度を向上さ
せるためには調整機構を必要とするが、この調整
機構の構成も比較的複雑であるなどの欠点があつ
た。 However, in the former case, it is complicated to process the bimetal uniformly without variations in the operating characteristics, resulting in a much more expensive element compared to the material cost, and especially in the drawing type, the conditions of the mold depend on the characteristics. easily influenced. Moreover, the latter type requires a large number of parts such as springs, resulting in high cost. Further, in order to improve the operating precision of both of these bimetals, an adjustment mechanism is required, but this adjustment mechanism also has drawbacks such as a relatively complicated structure.
本考案は従来のかかる欠点に着目してなされた
もので、製作に要する部品点数が少なく、又、複
雑な調整機構を必要とすることなく、過電流遮断
時のスナツプアクシヨンの作動が確実で接点摩耗
及び火花放電の少ない過電流遮断装置を提供する
ことを目的としたものである。 The present invention has been developed by focusing on these drawbacks of the conventional technology.The number of parts required for manufacturing is small, and there is no need for a complicated adjustment mechanism, and the snap action can be operated reliably in the event of an overcurrent interruption. The object of the present invention is to provide an overcurrent interrupting device with low contact wear and spark discharge.
次に本考案を実施例を示す添付の図面に基づい
て説明する。 Next, the present invention will be explained based on the attached drawings showing examples.
第１図は本考案装置の構造を組立図で示したも
ので１は予め用意した絶縁板又は配線板等の絶縁
性基板で、この基板１上に一対の帯状端子２ａ及
び２ｂを互に平行に間隔を置いてモールド又は溶
着等の手段により固着させ、又、端子２ａ及び２
ｂの上面に金属箔からなる接点３ａ及び３ｂをス
ポツト溶接等により固着させる。 Figure 1 shows the structure of the device according to the present invention in an assembled diagram. 1 is an insulating substrate such as an insulating board or a wiring board prepared in advance, and a pair of strip terminals 2a and 2b are arranged parallel to each other on this board 1. The terminals 2a and 2 are fixed at intervals by means such as molding or welding.
Contacts 3a and 3b made of metal foil are fixed to the upper surface of b by spot welding or the like.
一方、Ａは本考案の装置に使用されるバイメタ
ルで、並設された長方薄板状の側片４ａ，４ｂ間
に、スリツト７ａ，７ｂを介して側片４ａ，４ｂ
より巾広の中心片５を側片４ａ，４ｂよりやゝ長
く形成させてスナツプアクシヨンを持つ程度に湾
曲させ、側片４ａ，４ｂ及び中心片５の各両端部
を連結片６ａ及び６ｂで一体に連結すると共に、
連結片６ａ及び６ｂの下面中央部に可動接点８ａ
及び８ｂを溶接等により固着して構成される。 On the other hand, A is a bimetal used in the device of the present invention, and the side pieces 4a and 4b are inserted through slits 7a and 7b between the parallel thin rectangular side pieces 4a and 4b.
The wider center piece 5 is formed slightly longer than the side pieces 4a, 4b and curved to the extent that it has a snap action, and both ends of the side pieces 4a, 4b and the center piece 5 are connected to connecting pieces 6a, 6b. In addition to connecting them together,
A movable contact 8a is located at the center of the lower surface of the connecting pieces 6a and 6b.
and 8b are fixed by welding or the like.
かかる構成からなるバイメタルＡの本体は例え
ば第２図に示したような順序に従つて製作するこ
とができる。先ず(イ)に示したような形状即ち、連
結片６ａ及び６ｂで連結された側片４a1，４b1及
び４a2，４b2を夫々間隔ｌを隔てて設け、側片４
a1及び４b1（４a2及び４b2でもよい）の端部に側
片のつなぎ片４a3及び４b3を突設させ、スリツト
７ａ，７ｂを介して連結片６ａ，６ｂ間に中心片
５を連結させた形状に可撓性を有する金属薄板を
打抜いて形成したものを、(ロ)に示されるようにつ
なぎ片４a3及び４b3を側片４A1，４A2の端部及
び４b1，４b2の端部を夫々接続するように折り曲
げ、中心片５の長さに対しつなぎ片４a3，４b3で
連結された側片４ａ，４ｂの長さが短かくなるよ
うに保持して各側片の端部とつなぎ片とをＭ点に
おいてスポツト溶接等を行なうことにより、(ハ)に
示されるような中心片５がスナツプアクシヨンを
具備する程度に湾曲されたバイメタルが形成され
る。 The main body of bimetal A having such a structure can be manufactured, for example, in accordance with the sequence shown in FIG. First, the side pieces 4a 1 , 4b 1 and 4a 2 , 4b 2 connected by the connecting pieces 6a and 6b are provided with a spacing l apart from each other, and the side pieces 4 have the shape shown in (A).
Connecting pieces 4a 3 and 4b 3 of the side pieces are provided protrudingly from the ends of a 1 and 4b 1 (or 4a 2 and 4b 2 ), and a central piece 5 is connected between the connecting pieces 6a and 6b via slits 7a and 7b. As shown in (b), connecting pieces 4a 3 and 4b 3 are connected to the ends of side pieces 4A 1 and 4A 2 and 4b. 1 and 4b 2 so as to connect them, and hold them so that the length of the side pieces 4a and 4b connected by the connecting pieces 4a 3 and 4b 3 is shorter than the length of the center piece 5. By spot welding the ends of each side piece and the connecting piece at point M, a bimetal is formed in which the center piece 5 is curved to the extent that it has a snap action as shown in (c). be done.
次に、第１図に示されるようにバイメタルＡの
中心部即ち中心片５の中央部にボルト１０の挿通
用の孔９を設け、この孔９にボルト１０を挿通さ
せた後、固定金具１１にボルト１０を通し、加締
め等により固定金具１１をボルト１０に固定する
ことによりボルト１０をバイメタルＡに固定す
る。次いでバイメタルＡに固定されたボルト１０
を端子２ａ及び２ｂの中間部基板１に穿設された
孔１２に挿通し、基板１の裏面からナツト１０′
を該ボルト１０に螺着する。 Next, as shown in FIG. 1, a hole 9 for inserting the bolt 10 is provided in the center of the bimetal A, that is, in the center of the center piece 5, and after the bolt 10 is inserted into the hole 9, the fixing fitting 11 The bolt 10 is fixed to the bimetal A by passing the bolt 10 through and fixing the fixture 11 to the bolt 10 by caulking or the like. Next, bolt 10 fixed to bimetal A
is inserted into the hole 12 made in the intermediate board 1 of the terminals 2a and 2b, and then the nut 10' is inserted from the back side of the board 1.
screw onto the bolt 10.
かくして本考案の過電流遮断装置の組立ては完
了するが、この場合、絶縁基板１に固定される一
対の端子２ａ及び２ｂの間隔及びこれらの端子面
に固定される溶接点３ａ及び３ｂの位置はバイメ
タルＡの両端部に設けた可動接点８ａ及び８ｂが
バイメタルＡのスナツプアクシヨンによつて箔接
点３ａ及び３ｂに夫々当接したり離隔したりする
対応位置に設定される。 Thus, the assembly of the overcurrent interrupting device of the present invention is completed, but in this case, the distance between the pair of terminals 2a and 2b fixed to the insulating substrate 1 and the positions of the welding points 3a and 3b fixed to these terminal surfaces are determined as follows. Movable contacts 8a and 8b provided at both ends of bimetal A are set at corresponding positions in which they abut and separate from foil contacts 3a and 3b, respectively, by the snap action of bimetal A.
次に、本考案装置の作動について説明する。第
３図ａは組立てられた本考案装置の正面図、ｂは
その側面図を示す。又、第４図は本考案の作動状
態図を示す。 Next, the operation of the device of the present invention will be explained. FIG. 3a shows a front view of the assembled device of the present invention, and FIG. 3b shows a side view thereof. In addition, FIG. 4 shows an operating state diagram of the present invention.
バイメタルを介して電気的に接続された端子２
ａ及び２ｂ間に過電流が流れず正常な負荷電流に
おいてはバイメタルＡの可動接点８ａ，８ｂは端
子２ａ及び２ｂの箔接点３ａ，３ｂに当接して端
子２ａ，２ｂ間は導通しているが、この回路に設
定値以上の過電流が流れた場合、バイメタルＡの
湾曲した中心片５は加熱による両側片４ａ，４ｂ
との熱膨脹差に基づきスナツプアクシヨンを起し
て反転し、第４図の状態となり可動接点８ａ，８
ｂは夫々端子２ａ，２ｂの箔接点３ａ，３ｂから
離隔される。電流が正常値に回復した後は再び第
３図ａの状態に戻して通電を行なう。 Terminal 2 electrically connected via bimetal
When no overcurrent flows between a and 2b and the load current is normal, the movable contacts 8a and 8b of bimetal A come into contact with the foil contacts 3a and 3b of terminals 2a and 2b, and there is continuity between terminals 2a and 2b. , when an overcurrent exceeding a set value flows through this circuit, the curved central piece 5 of the bimetal A is heated and the both side pieces 4a, 4b are heated.
Based on the difference in thermal expansion between the
b are spaced apart from foil contacts 3a, 3b of terminals 2a, 2b, respectively. After the current has recovered to its normal value, the state shown in FIG. 3a is restored and energization is performed again.
しかして、本考案装置の電流遮断特性の調整は
バイメタルＡの中心片５を締付けているボルト１
０に対するナツト１０′の締付け強さを可変する
ことにより、中心片５の湾曲度を変化させて容易
に行なうことができる。 Therefore, the adjustment of the current interrupting characteristic of the device of the present invention is performed by using the bolt 1 that tightens the center piece 5 of the bimetal
By varying the tightening strength of the nut 10' relative to 0, the degree of curvature of the center piece 5 can be easily changed.
本考案の過電流遮断装置は以上説明したよう
に、板状のバイメタル基材の長手方向に一対のス
リツトを設けて中心片と両側片とを形成させ、該
中心片と該両側片の長さを相違させて、該バイメ
タル基材の端部に設けた可動接点をスナツプアク
シヨンにより接続側基板の固定接点に当接ないし
離間させる過電流遮断装置において、前記両側片
のそれぞれの中間部に、該両側片の長さを前記中
心片よりも短縮させる連結部を設けることによ
り、該中心片を湾曲させ、該中心片の中間部を前
記接続側基板に調整ネジで固定して成るものであ
るから、異なる湾曲度の中心片と両側片を形成さ
せるための従来の精度を要する絞り込み型が不要
となり、コスト的に有利であると共に、絞り込み
型の条件変動によるバイメタル特性の狂にをなく
して、均一な特性を有する過電流遮断装置を得る
ことが可能となる。又、従来の装置のようにバネ
等を使用せず、バイメタルのみで確実なスナツプ
アクシヨンが得られるので製作に要する部品点数
も少くてすみ、更に過電流遮断特性の調整はバイ
メタルの組付けと同時にボルトの回動操作により
容易に実施することができる等多くの利点を有す
る。 As explained above, in the overcurrent interrupting device of the present invention, a pair of slits are provided in the longitudinal direction of a plate-shaped bimetal base to form a center piece and both side pieces, and the lengths of the center piece and both side pieces are In an overcurrent interrupting device in which a movable contact provided at the end of the bimetal base material is brought into contact with or separated from a fixed contact of a connection side board by a snap action, the movable contact provided at the end of the bimetal base material is made to , the center piece is curved by providing a connecting portion that shortens the length of the both side pieces than the center piece, and the middle part of the center piece is fixed to the connection side board with an adjustment screw. This eliminates the need for a drawing die that requires conventional precision to form the center piece and both side pieces with different degrees of curvature, which is advantageous in terms of cost, and also eliminates the distortion of bimetal characteristics due to fluctuations in drawing die conditions. , it becomes possible to obtain an overcurrent interrupting device having uniform characteristics. In addition, since a reliable snap action can be obtained using only bimetal without using springs as in conventional devices, the number of parts required for production is reduced, and overcurrent cut-off characteristics can be adjusted by assembling bimetal. At the same time, it has many advantages such as being easily implemented by rotating the bolt.
第１図は本考案装置の構造を組立図で示した斜
視図、第２図はバイメタルの製作順序を示す図、
第３図ａは本考案装置の概略正面図、ｂはその側
面図、第４図は本考案装置の作動状態を示す図で
ある。
１……基板、２ａ，２ｂ……端子、３ａ，３ｂ
……箔接点、４ａ，４ｂ……側片、４a3，４b3…
…つなぎ片、５……中心片、７ａ，７ｂ……スリ
ツト、８ａ，８ｂ……可動接点、１０……ボル
ト、１０′……ナツト、Ａ……バイメタル。
Fig. 1 is a perspective view showing the structure of the device of the present invention in an assembled drawing, Fig. 2 is a diagram showing the manufacturing order of the bimetal,
FIG. 3a is a schematic front view of the device of the present invention, b is a side view thereof, and FIG. 4 is a diagram showing the operating state of the device of the present invention. 1... Board, 2a, 2b... Terminal, 3a, 3b
... Foil contacts, 4a, 4b ... Side pieces, 4a 3 , 4b 3 ...
... Connecting piece, 5... Center piece, 7a, 7b... Slit, 8a, 8b... Movable contact, 10... Bolt, 10'... Nut, A... Bimetal.
Claims (1)
ツトを設けて中心片と両側片とを形成させ、該中
心片と該両側片の長さを相違させて、該バイメタ
ル基材の端部に設けた可動接点をスナツプアクシ
ヨンにより接続側基板の固定接点に当接ないし離
間させる過電流遮断装置において、前記両側片の
それぞれの中間部に、該両側片の長さを前記中心
片よりも短縮させる連結部を設けることにより、
該中心片を湾曲させ、該中心片の中間部を前記接
続側基板に調整ネジで固定して成ることを特徴と
する過電流遮断装置。 A pair of slits are provided in the longitudinal direction of a plate-shaped bimetal base material to form a center piece and both side pieces, and the lengths of the center piece and both side pieces are made different, and the slits are provided at the ends of the bimetal base material. In an overcurrent interrupting device in which a movable contact is brought into contact with or separated from a fixed contact of a connection side board by a snap action, the length of the both sides is shorter than that of the center piece at the intermediate portion of each of the side pieces. By providing a connecting part that allows
An overcurrent interrupting device characterized in that the center piece is curved and the middle part of the center piece is fixed to the connection side board with an adjustment screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322683U JPS603536U (en) | 1983-06-20 | 1983-06-20 | Overcurrent cutoff device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322683U JPS603536U (en) | 1983-06-20 | 1983-06-20 | Overcurrent cutoff device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS603536U JPS603536U (en) | 1985-01-11 |
| JPH0338926Y2 true JPH0338926Y2 (en) | 1991-08-16 |
Family
ID=30223929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9322683U Granted JPS603536U (en) | 1983-06-20 | 1983-06-20 | Overcurrent cutoff device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603536U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5412480A (en) * | 1977-06-30 | 1979-01-30 | Matsushita Electric Works Ltd | Thermoswitch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5084778U (en) * | 1973-12-07 | 1975-07-19 |
-
1983
- 1983-06-20 JP JP9322683U patent/JPS603536U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5412480A (en) * | 1977-06-30 | 1979-01-30 | Matsushita Electric Works Ltd | Thermoswitch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS603536U (en) | 1985-01-11 |
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