JP2001093392A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2001093392A5 JP2001093392A5 JP1999266748A JP26674899A JP2001093392A5 JP 2001093392 A5 JP2001093392 A5 JP 2001093392A5 JP 1999266748 A JP1999266748 A JP 1999266748A JP 26674899 A JP26674899 A JP 26674899A JP 2001093392 A5 JP2001093392 A5 JP 2001093392A5
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- low melting
- point alloy
- protective element
- electrodes
- 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.)
- Withdrawn
Links
- 230000008018 melting Effects 0.000 description 36
- 238000002844 melting Methods 0.000 description 36
- 239000000956 alloy Substances 0.000 description 32
- 229910045601 alloy Inorganic materials 0.000 description 32
- 230000001681 protective effect Effects 0.000 description 22
- 239000000155 melt Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Description
【特許請求の範囲】
【請求項１】
絶縁基板と、この表面に互いに近接して形成された二つの電極と、これら電極の近傍に配置された特定温度で溶融する低融点合金と、この低融点合金を被覆するフラックスとを有し、前記低融点合金が周囲温度の上昇による異常時に軟化溶融し前記二つの電極間を接続導通させて回路を閉成する常開型または逆動作型を特徴とする保護素子。
【請求項２】
前記電極は一方が直線状部分と底部分を有する逆Ｌ字状、他方が直線状であり、前記逆Ｌ字状電極の底部分が前記直線状電極よりも突出して前記低融点合金に接触し、前記直線状電極が前記低融点合金と前記逆Ｌ字状の底部分の幅寸法分だけ離隔して配置したことを特徴とする請求項１に記載の保護素子。
【請求項３】
前記電極の表面は、前記低融点合金の溶融物が濡れやすい材質からなることを特徴とする請求項２に記載の保護素子。
【請求項４】
前記逆Ｌ字状電極の直線状部分が、前記直線状電極と対向して配置したことを特徴とする請求項３に記載の保護素子。
【請求項５】
前記直線状電極と対向する前記逆Ｌ字状電極の直線状部分が、前記低融点合金から離れるにしたがって間隔寸法を小さくしたことを特徴とする請求項４に記載の保護素子。
【請求項６】
前記絶縁基板は、その裏面側に抵抗体を形成し、この抵抗体の通電により前記低融点合金の周囲温度を上昇させることを特徴とする請求項１ないし５に記載の保護素子。
[Claims]
[Claim 1]
It has an insulating substrate, two electrodes formed close to each other on the surface thereof, a low melting point alloy that melts at a specific temperature arranged in the vicinity of these electrodes, and a flux that coats the low melting point alloy. A protective element characterized by a normally open type or a reverse operation type in which the low melting point alloy softens and melts when abnormal due to an increase in ambient temperature and connects and conducts between the two electrodes to close a circuit.
2.
One of the electrodes has an inverted L-shape having a linear portion and a bottom portion, and the other has a linear shape. The bottom portion of the inverted L-shaped electrode protrudes from the linear electrode and comes into contact with the low melting point alloy. The protective element according to claim 1, wherein the linear electrodes are arranged so as to be separated from the low melting point alloy by the width dimension of the inverted L-shaped bottom portion.
3.
The protective element according to claim 2, wherein the surface of the electrode is made of a material in which the melt of the low melting point alloy is easily wetted.
4.
The protective element according to claim 3, wherein the linear portion of the inverted L-shaped electrode is arranged so as to face the linear electrode.
5.
The protective element according to claim 4, wherein the linear portion of the inverted L-shaped electrode facing the linear electrode has a smaller spacing dimension as the distance from the low melting point alloy increases.
6.
The protective element according to claim 1 to 5, wherein the insulating substrate forms a resistor on the back surface side thereof, and the ambient temperature of the low melting point alloy is raised by energization of the resistor.
【０００６】
【課題を解決するための手段】
本発明は、絶縁基板と、この表面に互いに近接して形成された二つの電極と、これら電極の近傍に配置された特定温度で溶融する低融点合金と、この低融点合金を被覆するフラックスとを有し、前記低融点合金が周囲温度の上昇による異常時に軟化溶融し前記二つの電極間を接続導通させて回路を閉成する常開型または逆動作型を特徴とする保護素子である。このような保護素子によると、常時は二つの電極が離れているので、回路は開いているが、低融点合金の溶融点以上の温度になると低融点合金が溶融して、前記電極との接触部分から濡れ始めて電極間に濡れ広がって行き、二つの電極が導通状態になる。したがって、常開型ないし逆動作型（以下、単に常開型という）の保護素子として機能する。しかも、絶縁基板を用いた小型かつ薄型構造であるため、小型の電子機器等への組み込みが容易になる。さらに、常時は、低融点合金がフラックスによって被覆保護されて表面酸化等が防止され、温度異常上昇時には、低融点合金の溶融前にフラックスが軟化溶融して活性化され、それによって低融点合金の表面を清浄化して、低融点合金の正確な融点での溶融を保証できる。
0006
[Means for solving problems]
The present invention includes an insulating substrate, two electrodes formed close to each other on the surface thereof, a low melting point alloy that melts at a specific temperature arranged in the vicinity of these electrodes, and a flux that coats the low melting point alloy. It is a protective element characterized by a normally open type or a reverse operation type, wherein the low melting point alloy softens and melts when an abnormality occurs due to an increase in ambient temperature, and connects and conducts between the two electrodes to close a circuit. According to such a protective element, since the two electrodes are always separated from each other, the circuit is open, but when the temperature exceeds the melting point of the low melting point alloy, the low melting point alloy melts and comes into contact with the electrodes. It starts getting wet from the part and spreads between the electrodes, and the two electrodes become conductive. Therefore, it functions as a normally open type or reverse operation type (hereinafter, simply referred to as a normally open type) protective element. Moreover, since it has a small and thin structure using an insulating substrate, it can be easily incorporated into a small electronic device or the like. Furthermore, the low melting point alloy is always coated and protected by the flux to prevent surface oxidation, etc., and when the temperature rises abnormally, the flux softens and melts and is activated before the low melting point alloy melts, whereby the low melting point alloy becomes active. The surface can be cleaned to ensure melting of the low melting point alloy at the correct melting point.
本発明の保護素子は、また、前記電極は一方が直線状部分と底部分を有する逆Ｌ字状、他方が直線状であり、前記逆Ｌ字状電極の底部分が前記直線状電極よりも突出して前記低融点合金に接触し、前記直線状電極が前記低融点合金と前記逆Ｌ字状の底部分の幅寸法分だけ離隔して配置したことを特徴とする保護素子を開示する。このような保護素子によると、一方の電極に低融点合金が接触しているので、低融点合金の溶融開始時に、容易かつ確実に溶融した低融点合金が、電極と濡れて電極間に濡れ広がっていくため、確実な動作が得られ、かつ他方の電極は、低融点合金と非接触でかつ極く接近しているので、常時は二つの電極間が確実に非導通状態に保持され、低融点合金の溶融時には、溶融した低融点合金が他方の電極にも確実に濡れ広がる。
The protective element of the present invention also has an inverted L-shaped electrode having a linear portion and a bottom portion on one side and a linear shape on the other side, and the bottom portion of the inverted L-shaped electrode is larger than that of the linear electrode. Disclosed is a protective element that protrudes into contact with the low melting point alloy and is arranged such that the linear electrode is separated from the low melting point alloy by the width dimension of the inverted L-shaped bottom portion. According to such a protective element, since the low melting point alloy is in contact with one of the electrodes, the low melting point alloy that is easily and surely melted at the start of melting of the low melting point alloy gets wet with the electrode and spreads between the electrodes. Therefore, reliable operation can be obtained , and the other electrode is non-contact and very close to the low melting point alloy, so that the two electrodes are always reliably maintained in a non-conducting state and are low. When the melting point alloy is melted, the melted low melting point alloy is surely wetted and spread on the other electrode.
また、本発明の保護素子は、前記電極の表面は、前記低融点合金の溶融物が濡れやすい材質からなることを特徴とする保護素子を開示する。このような保護素子によると、溶融した低融点合金の電極への濡れ広がりが容易になり、確実な動作が得られる。
Further, the protective element of the present invention discloses a protective element characterized in that the surface of the electrode is made of a material in which the melt of the low melting point alloy is easily wetted. According to such a protective element, the molten low melting point alloy can be easily wetted and spread on the electrode, and a reliable operation can be obtained.
また、本発明は、前記逆Ｌ字状電極の直線状部分が、前記直線状電極と対向して配置したことを特徴とする保護素子を開示する。このような保護素子によると、溶融した低融点合金が、二つの電極の対向部分に容易に流れ広がり、確実な動作が得られる。
The present invention also discloses a protective element in which the linear portion of the inverted L-shaped electrode is arranged so as to face the linear electrode. According to such a protective element, the melted low melting point alloy easily flows and spreads to the opposite portions of the two electrodes, and a reliable operation can be obtained.
さらに、本発明は前記直線状電極と対向する前記逆Ｌ字状電極の直線状部分が、前記低融点合金から離れるにしたがって間隔寸法を小さくしたことを特徴とする保護素子を開示する。このような保護素子によると、溶融した低融点合金が、二つの電極の対向部分により容易かつ確実に流れ広がり、確実な動作が得られる。
Further, the present invention discloses a protective element characterized in that the linear portion of the inverted L-shaped electrode facing the linear electrode has a smaller spacing dimension as the distance from the low melting point alloy increases. According to such a protective element, the melted low melting point alloy easily and surely flows and spreads by the facing portions of the two electrodes, and a reliable operation can be obtained.
さらにまた、本発明は前記絶縁基板は、その裏面側に抵抗体を形成し、この抵抗体の通電により前記低融点合金の周囲温度を上昇させることを特徴とする保護素子を開示する。このような保護素子によると、常時は、回路が開いており、抵抗体に通電することにより、低融点合金を強制的に溶融させて回路を閉成することができるので、周囲温度に応答する温度ヒューズとしての保護素子とは異なった用途が開拓できる。 Furthermore, the present invention discloses a protective element characterized in that the insulating substrate forms a resistor on the back surface side thereof, and the ambient temperature of the low melting point alloy is raised by energization of the resistor. According to such a protective element, the circuit is always open, and by energizing the resistor, the low melting point alloy can be forcibly melted to close the circuit, so that the circuit responds to the ambient temperature. Applications different from the protective element as a thermal fuse can be pioneered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26674899A JP2001093392A (en) | 1999-09-21 | 1999-09-21 | Protecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26674899A JP2001093392A (en) | 1999-09-21 | 1999-09-21 | Protecting element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001093392A JP2001093392A (en) | 2001-04-06 |
| JP2001093392A5 true JP2001093392A5 (en) | 2006-10-12 |
Family
ID=17435170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26674899A Withdrawn JP2001093392A (en) | 1999-09-21 | 1999-09-21 | Protecting element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001093392A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013178939A (en) * | 2012-02-28 | 2013-09-09 | Kyocera Corp | Current fuse |
-
1999
- 1999-09-21 JP JP26674899A patent/JP2001093392A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI398894B (en) | Protection element | |
| JPH05198246A (en) | Thermal fuse and protective circuit device | |
| JP2010522420A (en) | Fusible gold element, thermal fuse with fusible gold element, and method for manufacturing a thermal fuse | |
| TW201003704A (en) | Protective element and method for manufacturing the same | |
| JP2005197005A (en) | Excessive temperature increase preventing element for surface of moving body, excessive temperature increase preventing device using the same, and temperature control element | |
| TW201246252A (en) | Three-function reflowable circuit protection device | |
| KR20160093620A (en) | Switch element, switch circuit, and warning circuit | |
| JP2000285777A (en) | Protective element | |
| US6614341B2 (en) | Thick film circuit with fuse | |
| AU725850B2 (en) | Thermally fused resistor | |
| JP2001093392A5 (en) | ||
| WO2014034261A1 (en) | Fuse | |
| JP4301474B2 (en) | Protective element | |
| JPH0412428A (en) | Fuse element | |
| JP6711704B2 (en) | Protective device with bypass electrode | |
| JP2001118481A5 (en) | ||
| KR101547439B1 (en) | The complex protection device of blocking the abnormal state of current and voltage | |
| JP2004087467A (en) | Thermal fuse for resistive circuit substrate | |
| JP2001093392A (en) | Protecting element | |
| JP6266355B2 (en) | Switch element, switch circuit, and alarm circuit | |
| JPH0514439Y2 (en) | ||
| JP2001222938A (en) | Protection element | |
| JP4234818B2 (en) | Resistance thermal fuse and manufacturing method thereof | |
| JP2004079306A (en) | Temperature fuse of resistor circuit board | |
| JPH0569847U (en) | Chip type circuit breaker without end cap |