JPH0266828A - Fuse - Google Patents
FuseInfo
- Publication number
- JPH0266828A JPH0266828A JP21665688A JP21665688A JPH0266828A JP H0266828 A JPH0266828 A JP H0266828A JP 21665688 A JP21665688 A JP 21665688A JP 21665688 A JP21665688 A JP 21665688A JP H0266828 A JPH0266828 A JP H0266828A
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- current
- several
- heat absorbing
- absorbing block
- 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.)
- Pending
Links
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 6
- 239000011147 inorganic material Substances 0.000 claims abstract description 6
- 239000010409 thin film Substances 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011521 glass Substances 0.000 abstract description 5
- 239000010408 film Substances 0.000 abstract description 4
- 230000004927 fusion Effects 0.000 abstract 2
- 239000003517 fume Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 6
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 210000002105 tongue Anatomy 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は自動車等に使用され、負荷回路を過電流から保
護するヒユーズに関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a fuse used in automobiles and the like to protect a load circuit from overcurrent.
従来の技術
従来よシ、自動車のモータ負荷回路の様な、通電開始直
後に定常電流の数倍にあたる過電流が頻繁に流れる回路
の保護には、無機質材料からなる吸熱体を有することに
よって、過電流に対する遮断時間を、ガラス管ヒユーズ
に比べ、がなシ長くしたヒユーズが使用されている。Conventional technology Conventionally, in order to protect circuits, such as automobile motor load circuits, where overcurrents that are several times the steady current flow frequently flow immediately after the start of energization, it is possible to Fuses are used that have a much longer cut-off time for current than glass tube fuses.
以下図面を参照しながら上述した従来のヒュズについて
説明する。The conventional fuse mentioned above will be explained below with reference to the drawings.
第４図は従来のヒユーズの断面図を、第５図は第４図に
示すヒユーズの内部部品の斜視図を示すものである。１
は耐熱性樹脂材料からなるケースで部品挿入用の開口部
１ａと、回路側端子の挿入口１ｂ、１ｃを有する。２は
ヒユーズエレメントであシ、多重に折曲されたニレメン
）２ａと、ニレメン）２ａよシ断面積が小さく形成され
た溶断部２ｂを有し、両端には、後述のメス端子４，５
が形成されている。３は吸熱体で、耐熱性及び熱伝導性
に優れたセラミ久スがらなシ、エレメント２ａの曲折形
状に対応した溝部３ａを有し、溝部３ａにはエレメント
２ａが挿入された後、セラミクス接着剤で封入固定され
る。４，５はメス端子であシ、ヒユーズエレメント２と
一体成形されている。端子４，５には舌４ａ、５ａが形
成され３ ベー〉゛
ており、ケース１に挿入された時、ケース内部に設けら
れた突起１ｄ、１ｅと各々係合し、端子４゜５がケース
内部から抜けない様になっている。６はカバーで、透明
の合成樹脂から成シ、ケース１の開口部１ａを閉鎖して
いる。FIG. 4 is a sectional view of a conventional fuse, and FIG. 5 is a perspective view of internal parts of the fuse shown in FIG. 4. 1
The case is made of a heat-resistant resin material and has an opening 1a for inserting components and insertion openings 1b and 1c for circuit-side terminals. Reference numeral 2 is a fuse element, which has a multi-folded elm plate 2a and a fusing part 2b formed with a smaller cross-sectional area than the elm plate 2a, and female terminals 4 and 5, which will be described later
is formed. Reference numeral 3 designates a heat absorbing body, which is made of a ceramic material with excellent heat resistance and thermal conductivity, and has a groove 3a corresponding to the bent shape of the element 2a.After the element 2a is inserted into the groove 3a, the ceramic is bonded. It is sealed and fixed with an agent. Reference numerals 4 and 5 are female terminals, which are integrally molded with the fuse element 2. The terminals 4 and 5 have tongues 4a and 5a formed thereon, and when inserted into the case 1, they engage with protrusions 1d and 1e provided inside the case, respectively, so that the terminals 4 and 5 are attached to the case. It seems like it can't come out from inside. A cover 6 is made of transparent synthetic resin and closes the opening 1a of the case 1.
以上の様に構成されたヒユーズについて、以下その動作
について説明する。The operation of the fuse configured as described above will be explained below.
メス端子４，５を介して、負荷回路に接続されたヒユー
ズエレメント２に過電流が流れると、断面積の最も小さ
い溶断部２ｂの温度が、自己発熱によシ上昇し始める。When an overcurrent flows through the fuse element 2 connected to the load circuit via the female terminals 4 and 5, the temperature of the fusing part 2b, which has the smallest cross-sectional area, begins to rise due to self-heating.
この時溶断部で発生する熱の一部が、ニレメン）２ａを
介して、吸熱体３に吸収されるのて、溶断部２ｂの温度
上昇は遅くなり、溶断温度であるヒユーズエレメント２
の融点になるまでに、ガラス管ヒユーズと比較して、数
倍から数十倍の時間を要する。これによってモタ負荷回
路の様に異常時でない、通電開始時に定常電流の数倍の
過電流が流れても回路が遮断することはない。一方、シ
ョート等による異常時の過電流が流れた時は、一定の時
間を要するが、負荷を破損させる前に回路を遮断するこ
とができる。At this time, a part of the heat generated in the fusing part is absorbed by the heat absorbing body 3 via the niremen 2a, so the temperature rise in the fusing part 2b is slowed down, and the fuse element 2 which is at the fusing temperature
It takes several to several tens of times longer to reach the melting point of a glass tube fuse than a glass tube fuse. As a result, the circuit will not be cut off even if an overcurrent several times the steady current flows at the start of energization, even when there is no abnormality, such as in a motor load circuit. On the other hand, when an abnormal overcurrent flows due to a short circuit or the like, it takes a certain amount of time, but the circuit can be cut off before the load is damaged.
発明が解決しようとする課題
しかし表から上記のような構成では、通電電流に対する
遮断時間を測定した場合、第３図のグラフにおいて破線
で描かれた遮断特性曲線が得られ、負荷回路とヒユーズ
をつなぐリード線の発煙限界曲線と比較するとＡ点で交
差する。すなわちそれはＡ点に対応する電流が流れると
負荷回路のリド線が発煙すること意味しておシ、発煙を
防止する別の回路保護装置が必要となる。Problems to be Solved by the Invention However, in the above configuration as shown in the table, when the breaking time for the carrying current is measured, the breaking characteristic curve drawn by the broken line in the graph of Fig. 3 is obtained, and the load circuit and the fuse are When compared with the smoking limit curve of the connecting lead wire, it intersects at point A. In other words, this means that when the current corresponding to point A flows, the lead wire of the load circuit will generate smoke, and another circuit protection device is required to prevent smoke generation.
本発明は上記課題に鑑み、電流値に対応して数十秒から
数百秒の遮断時間を要し、且つ、負荷回路に接続された
リード線が発煙する前に回路を遮断するヒユーズを提供
するものである。In view of the above-mentioned problems, the present invention provides a fuse that requires an interruption time of several tens of seconds to several hundred seconds depending on the current value, and that interrupts the circuit before the lead wire connected to the load circuit emits smoke. It is something to do.
課題を解決するだめの手段
上記課題を解決するだめに、本発明のヒユーズは、無機
質材料からなる吸熱ブロックと、前記吸熱ブロックの表
面に接着させた薄膜状のヒユーズエレメントと、前記ヒ
ユーズエレメントの両端部近傍に導電性の接合部材によ
って接合された端子５ ベー。Means for Solving the Problems In order to solve the above problems, the fuse of the present invention includes a heat absorbing block made of an inorganic material, a thin film fuse element adhered to the surface of the heat absorbing block, and both ends of the fuse element. Terminal 5 is connected near the terminal with a conductive joining member.
と、前記端子を収納・保持する非導電性のケースと、前
記ケースの開口部を閉じるカバーを備えだものである。The device includes a non-conductive case for storing and holding the terminal, and a cover for closing the opening of the case.
作 用
本発明は上記した構成によって、薄膜状のヒユーズエレ
メントが、過電流によって発熱し、その熱を吸熱ブロッ
クが直接に熱を吸収し、ヒユーズエレメントの溶断する
までの時間を遅らせるが、ヒユーズエレメントが薄膜状
で、断面積が非常に小さく、従来の板状ヒユーズエレメ
ントに比較して、より低い電流でも発熱しやすく、遮断
できる電流の範囲が広くなる。Effects of the present invention With the above-described configuration, the thin film fuse element generates heat due to overcurrent, and the heat absorption block directly absorbs the heat, delaying the time until the fuse element melts. The fuse element is thin film-like and has a very small cross-sectional area, so compared to conventional plate-shaped fuse elements, it generates heat easily even at lower currents, and the range of current that can be cut off is wider.
実施例
以下本発明の実施例について、図面を参照しながら説明
する。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.
第１図は本発明の実施例におけるヒユーズであシ、第２
図は、第１図に示す内部部品の斜視図である。第１図、
第２図において、了は無機質材料からなる吸熱ブロック
であり、熱伝導性の良いアルミナセラミクスで形成され
ている、吸熱プロソロへ−〉
り７の両端付近には、後述の導電性接合部材が挿入され
る穴７ａ、７ｂが設けられている。８，９は、ヒユーズ
エレメントであシ、吸熱ブロック７の表面に、導電ペー
ストを膜状にスクリーン印刷させた後、高温で焼成する
ことによって接着され、中央部は、両端部よシ幅が狭く
形成されている。Figure 1 shows the fuses in the embodiment of the present invention;
The figure is a perspective view of the internal components shown in FIG. 1. Figure 1,
In Fig. 2, the end is a heat absorbing block made of an inorganic material, and the conductive bonding members described below are inserted near both ends of the heat absorbing block 7, which is made of alumina ceramics with good thermal conductivity. Holes 7a and 7b are provided. 8 and 9 are fuse elements, which are bonded by screen-printing a film of conductive paste on the surface of the heat-absorbing block 7 and then firing it at a high temperature, and the width of the central part is narrower than that of both ends. It is formed.
ヒユーズエレメント８，９は、吸熱ブロック７をはさん
で、対向する位置に形成されておシ、その膜厚は１８〜
２２μｍが成形上適切である。The fuse elements 8 and 9 are formed at opposite positions with the heat absorbing block 7 in between, and have a film thickness of 18 to 18 mm.
22 μm is suitable for molding.
１０．１１は、端子であシ、一端には後述の導電性接合
部材を挿入する孔１０ａ、１１ａを有しヒユーズエレメ
ント８と接合され、他端はメス端子１ｏｂ、１１ｂが形
成されている。メス端子１ｏｂ。Reference numeral 10.11 is a terminal, and one end has holes 10a and 11a into which a conductive joining member, which will be described later, is inserted, and is joined to the fuse element 8, and the other end is formed with female terminals 1ob and 11b. Female terminal 1ob.
１１ｂには舌１０ｃ、１１ｃが設けられている。11b is provided with tongues 10c, 11c.
１２．１３は、棒状の導電性接合部材であシ、吸熱ブロ
ック７の穴７ａ 、 ７ｂ、ヒユーズエレメント８，９
、端子１０．１１の孔１０ａ、１１ａを貫通して挿入さ
れた後、両端がかしめられる。導電性接合部材１２．１
３によって、吸熱ブロック７と端子１０．１１は固定さ
れ、ヒューズエレメ了
ント８，９と端子１０，１１は電気的に通じることにな
る。１４ば、非導電性のケースであり、内部部品を挿入
する開口部１４ａと、回路側端子の挿入口１４ｂ、１４
Ｃを有する。また、内部の中央部には突起部１４ｄ、１
４ｅを有し、端子１０゜１１がケース内部に収納・保持
されたとき、端子１０．１１の舌１０Ｃ，１１Ｃが、突
起部１４ｄ。12.13 is a rod-shaped conductive joining member, holes 7a, 7b of heat absorption block 7, fuse elements 8, 9
, after being inserted through the holes 10a, 11a of the terminal 10.11, both ends are caulked. Conductive joining member 12.1
3, the heat absorbing block 7 and the terminals 10, 11 are fixed, and the fuse element terminals 8, 9 and the terminals 10, 11 are electrically connected. 14 is a non-conductive case, and has an opening 14a for inserting internal components and insertion ports 14b for circuit side terminals.
It has C. In addition, a protrusion 14d, 1 is provided at the center of the interior.
4e, and when the terminals 10.11 are housed and held inside the case, the tongues 10C, 11C of the terminals 10.11 become the projections 14d.
１４ｅと各々係合し、端子１０．１１がケース１４の外
側へ抜けない様になっている。１５はカバでケース１４
の開口部１４ａを閉じている。14e, respectively, to prevent the terminals 10 and 11 from slipping out to the outside of the case 14. 15 is a cover and case 14
The opening 14a is closed.
以上の様に構成されたヒユーズについて以下、第１図及
び第２図を用いてその動作を説明する。The operation of the fuse constructed as described above will be explained below with reference to FIGS. 1 and 2.
負荷回路に接続された本発明の実施例のヒュズにおいて
、ショート等によって定常電流の数倍の過電流が流れる
と、ヒユーズエレメント８，９には過電流の２等分され
た値の電流が流れるのでヒユーズエレメント８，９の極
端な温度上昇を防ぐことができる。ヒユーズエレメント
８，９は膜厚が１８〜２２μｍと凡常に薄く、すぐに温
度上昇を始め、ヒユーズエレメント８，９の溶断温度に
達すると溶断し、回路を遮断する。吸熱ブロック７がな
い場合は、ヒユーズエレメント８，９は１秒以内に溶断
するが、ヒユーズエレメント８゜９は、吸熱ブロックに
接着されているので、ヒュズエレメント８，９で発生す
る熱の一部が吸熱ブロック７に吸収されるため、溶断温
度まで到達する時間が、電流値に応じて、数十秒から数
百秒かかりガラス管ヒユーズに比べ、数倍から数十倍と
なる。In the fuse according to the embodiment of the present invention connected to a load circuit, when an overcurrent several times the steady current flows due to a short circuit or the like, a current equal to the value divided in half of the overcurrent flows through the fuse elements 8 and 9. Therefore, an extreme temperature rise in fuse elements 8 and 9 can be prevented. The fuse elements 8 and 9 are usually thin, with a film thickness of 18 to 22 μm, and the temperature immediately starts to rise, and when the fuse elements 8 and 9 reach the melting temperature, they are blown and the circuit is cut off. If there is no heat absorbing block 7, the fuse elements 8 and 9 will melt within one second, but since the fuse elements 8 and 9 are bonded to the heat absorbing block, the heat generated in the fuse elements 8 and 9 will be absorbed. Since part of the fuse is absorbed by the heat absorbing block 7, it takes tens of seconds to hundreds of seconds to reach the melting temperature depending on the current value, which is several times to several tens of times longer than that of a glass tube fuse.
第３図のグラフで、実線の曲線は本発明の実施例のヒユ
ーズに所定の電流を通電し、遮断時間を測定した結果で
あり、負荷回路のリード線の発煙限界曲線と交差するこ
とはなく、リード線が発煙する前に遮断できることを意
味している。In the graph of Fig. 3, the solid curve is the result of measuring the cut-off time when a predetermined current is applied to the fuse of the embodiment of the present invention, and it does not intersect with the smoke limit curve of the lead wire of the load circuit. , which means that the lead wire can be shut off before it starts to smoke.
以上の様に本実施例によれば、無機質材料からなる吸熱
ブロックの表面へ、導電ペーストを薄膜状にスクリーン
印刷した後、高温で焼成し、接着させたヒユーズエレメ
ントに、端子を導電性接合部材で接合することによシ、
遮断時間が電流値に対応して数十秒から数百秒を要し且
つリード線が９ベー。As described above, according to this embodiment, a conductive paste is screen printed in a thin film form on the surface of a heat absorbing block made of an inorganic material, and then the terminal is attached to the conductive bonding member by firing at a high temperature and bonding the fuse element. By joining with
The cut-off time takes several tens of seconds to several hundred seconds depending on the current value, and the lead wire is 9 base.
発煙する丑でに遮断することができる。It can be blocked by a fuming ox.
発明の効果
以」−のように本発明は、無機質材料からなる吸熱ブロ
ックと、前記吸熱ブロックの表面に接着させた薄膜状の
ヒユーズエレメントと、前記ヒュズエレメントに、導電
性接合部材によって接合された端子と、前記端子を収納
・保持する非導電性のケースと、前記ケースの開口部を
閉じるカバーを備えることにより、遮断時間が源流値に
対応して、数十秒から数百秒となシ、モータ負荷回路の
様に異常時で彦い、通電開始時に定常電流の数倍の過電
流が流れても回路を遮断することはなく、一方、ショー
ト等により過電流が流れた場合は負荷が破損する前に、
又負荷に接続されたリード線が発煙する前に回路を遮断
することができる優れたヒユーズを実現できるものであ
る。As described in "Effects of the Invention", the present invention provides a heat absorbing block made of an inorganic material, a thin film fuse element bonded to the surface of the heat absorbing block, and a fuse element bonded to the fuse element by a conductive bonding member. By providing a terminal, a non-conductive case that houses and holds the terminal, and a cover that closes the opening of the case, the cut-off time can be changed from tens of seconds to hundreds of seconds, depending on the source value. However, even if an overcurrent several times the steady current flows at the start of energization, the circuit will not be cut off.On the other hand, if an overcurrent flows due to a short circuit, etc. before it gets damaged.
Furthermore, it is possible to realize an excellent fuse that can interrupt the circuit before the lead wire connected to the load emits smoke.
第１図は本発明の実施例におけるヒユーズの断面図、第
２図は第１図に示すヒユーズの内部部品の斜視図、第３
図は本発明の実施例におけるヒュ１０．１．。
ズと従来のヒユーズの遮断特性曲線とリード線の発煙限
界曲線を記載したグラフ、第４図は従来のヒユーズの断
面図、第５図は第４図に示す従来のヒユーズの内部部品
の斜視図である。
７・・・・・・吸Ｍ ７”ロック、８，９・・・・ヒユ
ーズエレメント、１０．１１・・・・端子、１２．１３
・・・・・・導電性接合部材、１４・・・・・・ケース
、１４ａ・・・・・・開口部、１５・・・・−・カバ
代理人の氏名 弁理士 粟 野 重 孝 ほか１名第
図FIG. 1 is a sectional view of a fuse in an embodiment of the present invention, FIG. 2 is a perspective view of internal parts of the fuse shown in FIG. 1, and FIG.
The figure shows the diagram 10.1. . Figure 4 is a cross-sectional view of the conventional fuse, and Figure 5 is a perspective view of the internal parts of the conventional fuse shown in Figure 4. It is. 7... Suction M 7" lock, 8, 9... Fuse element, 10.11... Terminal, 12.13
... Conductive joining member, 14 ... Case, 14a ... Opening, 15 ... Name of cover agent Patent attorney Shigetaka Awano and others 1 name chart
Claims (1)
の表面に接着させた薄膜状のヒューズエレメントと、前
記ヒューズエレメントの両端部近傍に導電性接合部材に
よって接合された１対の端子と、部品挿入用の開口部を
有して前記端子を収納・保持する非導電性のケースと、
前記ケースの開口部を閉じるカバーとを備えたことを特
徴とするヒューズ。A heat absorbing block made of an inorganic material, a thin film fuse element bonded to the surface of the heat absorbing block, a pair of terminals bonded near both ends of the fuse element by a conductive bonding member, and a component insertion block. a non-conductive case having an opening to house and hold the terminal;
A fuse comprising: a cover that closes an opening of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21665688A JPH0266828A (en) | 1988-08-31 | 1988-08-31 | Fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21665688A JPH0266828A (en) | 1988-08-31 | 1988-08-31 | Fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266828A true JPH0266828A (en) | 1990-03-06 |
Family
ID=16691876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21665688A Pending JPH0266828A (en) | 1988-08-31 | 1988-08-31 | Fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266828A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581225A (en) * | 1995-04-20 | 1996-12-03 | Littelfuse, Inc. | One-piece female blade fuse with housing |
| US5668521A (en) * | 1995-03-22 | 1997-09-16 | Littelfuse, Inc. | Three piece female blade fuse assembly having fuse link terminal with a clip receiving portion |
| US5929740A (en) * | 1997-10-20 | 1999-07-27 | Littelfuse, Inc. | One-piece female blade fuse with housing and improvements thereof |
| US6529113B2 (en) * | 2000-05-18 | 2003-03-04 | Yazaki Corporation | Push-in type fuse |
-
1988
- 1988-08-31 JP JP21665688A patent/JPH0266828A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5668521A (en) * | 1995-03-22 | 1997-09-16 | Littelfuse, Inc. | Three piece female blade fuse assembly having fuse link terminal with a clip receiving portion |
| US5581225A (en) * | 1995-04-20 | 1996-12-03 | Littelfuse, Inc. | One-piece female blade fuse with housing |
| US5929740A (en) * | 1997-10-20 | 1999-07-27 | Littelfuse, Inc. | One-piece female blade fuse with housing and improvements thereof |
| US6529113B2 (en) * | 2000-05-18 | 2003-03-04 | Yazaki Corporation | Push-in type fuse |
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