JPH11204004A - Thermal fuse - Google Patents
Thermal fuseInfo
- Publication number
- JPH11204004A JPH11204004A JP484098A JP484098A JPH11204004A JP H11204004 A JPH11204004 A JP H11204004A JP 484098 A JP484098 A JP 484098A JP 484098 A JP484098 A JP 484098A JP H11204004 A JPH11204004 A JP H11204004A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- conductive metal
- metal member
- resistant conductive
- heat resistant
- 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
Landscapes
- Fuses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、温度ヒューズに関
し、特に、１５０℃以上の温度で正確に作動する温度ヒ
ューズに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal fuse, and more particularly, to a thermal fuse that operates accurately at a temperature of 150 ° C. or more.
【０００２】[0002]
【従来の技術】従来から温度ヒューズが機器の温度の過
度の上昇を防ぐために使用されている。この温度ヒュー
ズは、２つのばね性あるりん青銅板の先端が接するよう
に該りん青銅板を湾曲させた状態で該２つのりん青銅板
の先端をはんだ付けしたものである。このため、２つの
りん青銅板間ははんだを介して接続されている。このよ
うにすると、温度ヒューズの周囲温度が上昇し、はんだ
が溶融する温度に達すると、該はんだが溶融するので、
前記２つのりん青銅板の先端が離れる。このため、前記
２つのりん青銅板間が断線するので、この温度ヒューズ
により機器への電力供給を遮断し、該機器の温度が過度
に上昇することを防ぐことができる。2. Description of the Related Art Conventionally, thermal fuses have been used to prevent an excessive rise in the temperature of equipment. This thermal fuse is obtained by soldering the ends of two phosphor bronze plates in a state where the two ends of the phosphor bronze plate are curved so that the ends thereof are in contact with each other. For this reason, the two phosphor bronze plates are connected via solder. In this way, the temperature around the thermal fuse rises, and when the temperature reaches the temperature at which the solder melts, the solder melts,
The tips of the two phosphor bronze plates are separated. For this reason, since the two phosphor bronze plates are disconnected, the power supply to the device is cut off by the thermal fuse, and the temperature of the device can be prevented from rising excessively.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記従来例で
は、前記りん青銅板の温度が１５０℃以上になると、前
記りん青銅板のばね性がなくなるので、上記従来例の温
度ヒューズを１５０℃以上の温度を検出するものとして
使用することができなかった。したがって、本願発明の
目的は、上述の従来例の問題点を解決し、１５０℃以上
の温度を検出することができる温度ヒューズを提供する
ことである。However, in the above-mentioned conventional example, when the temperature of the phosphor bronze plate becomes 150 ° C. or higher, the spring property of the phosphor bronze plate is lost. It could not be used as a temperature detector. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems of the conventional example and to provide a thermal fuse capable of detecting a temperature of 150 ° C. or higher.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するた
め、本願の第１の発明の構成は、弾性を有する第１の耐
熱導電性金属部材と、弾性を有する第２の耐熱導電性金
属部材と、耐熱絶縁性固定部材とを具備し、前記第１の
耐熱導電性金属部材の先端部分と前記第２の耐熱導電性
金属部材の先端部分とが所定のろう付け温度の硬ろうで
ろう付けされ、前記第１の耐熱導電性金属部材の基部分
と前記第２の耐熱導電性金属部材の基部分が離れた状態
にて、前記第１の耐熱導電性金属部材の基部分及び前記
第２の耐熱導電性金属部材の基部分が前記耐熱絶縁性固
定部材に固定され、前記第１の耐熱導電性金属部材と前
記第２の耐熱導電性金属部材に前記第１の耐熱導電性金
属部材の先端部分と前記第２の耐熱導電性金属部材の先
端部分とが離れる方向の残留応力があることを特徴とす
る温度ヒューズである。According to a first aspect of the present invention, a first heat-resistant conductive metal member having elasticity and a second heat-resistant conductive metal member having elasticity are provided. And a heat-resistant insulating fixing member, wherein the tip portion of the first heat-resistant conductive metal member and the tip portion of the second heat-resistant conductive metal member are brazed with a hard brazing at a predetermined brazing temperature. The base portion of the first heat-resistant conductive metal member and the second portion of the second heat-resistant conductive metal member are separated from each other while the base portion of the first heat-resistant conductive metal member is separated from the base portion of the second heat-resistant conductive metal member. The base portion of the heat-resistant conductive metal member is fixed to the heat-resistant and insulating fixing member, and the first heat-resistant conductive metal member and the second heat-resistant conductive metal member have the first heat-resistant conductive metal member. The direction in which the tip portion is separated from the tip portion of the second heat-resistant conductive metal member A thermal fuse, characterized in that there is residual stress.
【０００５】上記第１の発明の構成により、前記第１の
耐熱導電性金属部材の基部分と前記第２の耐熱導電性金
属部材の基部分が離れた状態にて、前記第１の耐熱導電
性金属部材の基部分及び前記第２の耐熱導電性金属部材
の基部分が前記耐熱絶縁性固定部材に固定されているの
で、前記第１の耐熱導電性金属部材の基部分と前記第２
の耐熱導電性金属部材の基部分が互いに絶縁された状態
で相互の位置関係が固定されている。更に、前記第１の
耐熱導電性金属部材の先端部分と前記第２の耐熱導電性
金属部材の先端部分とを所定のろう付け温度の硬ろうで
ろう付けしているので、前記第１の耐熱導電性金属部材
の先端部分と前記第２の耐熱導電性金属部材の先端部分
が硬ろうを介して電気的に接続される。温度ヒューズの
周囲温度が硬ろうの前記所定のろう付け温度（溶融温
度）まで上昇したときに、該硬ろうが溶融するため、前
記第１の耐熱導電性金属部材の先端部分と前記第２の耐
熱導電性金属部材の先端部分とが離れる方向の残留応力
により、前記第１の耐熱導電性金属部材の先端部分と前
記第２の耐熱導電性金属部材の先端部分が離れるため、
前記第１の耐熱導電性金属部材と前記第２の耐熱導電性
金属部材との間が断線し、電気的に絶縁される。According to the first aspect of the present invention, the first heat-resistant conductive metal member is separated from the base portion of the second heat-resistant conductive metal member by the first heat-resistant conductive metal member. Since the base portion of the conductive metal member and the base portion of the second heat-resistant conductive metal member are fixed to the heat-resistant insulating fixing member, the base portion of the first heat-resistant conductive metal member and the second heat-resistant conductive metal member are fixed to each other.
The relative positions of the heat-resistant conductive metal members are fixed in a state where the base portions are insulated from each other. Further, since the tip end of the first heat-resistant conductive metal member and the tip end of the second heat-resistant conductive metal member are brazed by a hard brazing at a predetermined brazing temperature, the first heat-resistant conductive metal member is brazed. The tip portion of the conductive metal member and the tip portion of the second heat-resistant conductive metal member are electrically connected via a hard solder. When the ambient temperature of the thermal fuse rises to the predetermined brazing temperature (melting temperature) of the hard solder, the hard solder melts, so that the tip portion of the first heat-resistant conductive metal member and the second heat-resistant conductive metal member are melted. Due to the residual stress in the direction in which the tip portion of the heat-resistant conductive metal member is separated, the tip portion of the first heat-resistant conductive metal member is separated from the tip portion of the second heat-resistant conductive metal member.
The first heat-resistant conductive metal member is disconnected from the second heat-resistant conductive metal member, and is electrically insulated.
【０００６】第２の発明の構成は、上記第１の発明の構
成において、前記第１の耐熱導電性金属部材の形状及び
前記第２の耐熱導電性金属部材の形状が帯状板であるこ
とである。According to a second aspect of the invention, in the configuration of the first aspect, the shape of the first heat-resistant conductive metal member and the shape of the second heat-resistant conductive metal member are band-shaped plates. is there.
【０００７】上記第２の発明の構成により、上記第１の
発明の作用とともに、前記第１の耐熱導電性金属部材の
形状及び前記第２の耐熱導電性金属部材の形状が帯状板
であるので、前記第１の耐熱導電性金属部材と前記第２
の耐熱導電性金属部材を湾曲させて前記残留応力を発生
させること及び前記先端部分のろう付けが容易になる。According to the structure of the second aspect of the present invention, since the shape of the first heat-resistant conductive metal member and the shape of the second heat-resistant conductive metal member are strip-shaped plates, together with the operation of the first invention. The first heat-resistant conductive metal member and the second heat-resistant conductive metal member;
In this case, it is easy to generate the residual stress by bending the heat-resistant conductive metal member of (1) and to braze the tip portion.
【０００８】[0008]
【発明の実施の形態】図１は本願発明の第１の実施の形
態に係わる温度ヒューズを示している。なお図１は
（ａ）〜（ｅ）からなり、（ａ）は該実施の形態の正面
を示し、（ｂ）は（ａ）に示すもののＡ−Ａ断面構造を
示し、（ｃ）は該実施の形態の一部分の正面を示し、
（ｄ）は（ｃ）に示すものの側面を示し、（ｅ）は該実
施の形態の他の一部分を示している。FIG. 1 shows a thermal fuse according to a first embodiment of the present invention. 1A to 1E, FIG. 1A shows a front view of the embodiment, FIG. 1B shows a cross-sectional structure taken along line AA of FIG. 1A, and FIG. FIG. 4 shows a front view of a part of the embodiment,
(D) shows a side view of what is shown in (c), and (e) shows another part of the embodiment.
【０００９】図１において、セラミック管１０はほぼ円
筒状であり、セラミック管１０の内面１１は基部１３か
ら先端１４まで貫通している。なお、１２はセラミック
管１０の外面である。耐熱絶縁性固定部材としてのセラ
ミック芯２０は円形外周２１を有し、凹部２２、２３が
形成されている。円形外周２１の径はセラミック管１０
の内面１１の径より若干小さく形成されている。円形外
周２１、内面１１及び後述する金属板３１、３２を接着
するために、円形外周２１、内面１１及び金属板３１、
３２の間に耐熱絶縁性無機接着材３５が充填されてい
る。なお、耐熱絶縁性無機接着剤３５は例えば一液加熱
硬化型のセラミック接着剤である。In FIG. 1, a ceramic tube 10 has a substantially cylindrical shape, and an inner surface 11 of the ceramic tube 10 penetrates from a base 13 to a tip 14. In addition, 12 is the outer surface of the ceramic tube 10. A ceramic core 20 as a heat-resistant and insulating fixing member has a circular outer periphery 21 and concave portions 22 and 23 are formed. The diameter of the circular outer periphery 21 is
Is formed slightly smaller than the diameter of the inner surface 11. In order to bond the circular outer periphery 21, the inner surface 11, and metal plates 31, 32 described later, the circular outer periphery 21, the inner surface 11, and the metal plate 31,
The space 32 is filled with a heat-resistant insulating inorganic adhesive 35. The heat-resistant insulating inorganic adhesive 35 is, for example, a one-component heat-curable ceramic adhesive.
【００１０】金属板３１は先端部分３１ａ、中央部分３
１ｂ及び基部分３１ｃからなり、組立前は（ｅ）に示す
ように折れ曲がっている。なお（ｅ）において、角度
α、βの値は、例えばαが２５°で、βが１５°であ
る。なお、先端部分３１ａの長さＬ1 、中央部分３１ｂ
の長さＬ2 及び基部分３１ｃの長さＬ3 の各値は、例え
ばＬ1 が６mm、Ｌ2 が２２mm、Ｌ3 が１６mmである。ま
た、金属板３１の幅Ｗ、厚さｔの各値は例えばＷが４．
５mm、ｔが０．５mmである。金属板３１の材質は耐熱導
電性金属であり、例えばばね性あるインコネル板（ニッ
ケル50〜55%,クロム17〜21%,その他鉄等を含む合金）で
ある。金属板３２は先端部分３２ａ，中央部分３２ｂ及
び基部分３２ｃからなり、金属板３１と同じ材質・形状
のものである。The metal plate 31 has a tip portion 31a, a central portion 3
1b and a base portion 31c, which is bent before assembly as shown in FIG. In (e), the values of the angles α and β are, for example, α = 25 ° and β = 15 °. In addition, the length L 1 of the tip portion 31a and the center portion 31b
Each value of the length L 2 and base portion 31c of the length L 3, for example L 1 is 6 mm, L 2 is 22 mm, L 3 is 16 mm. Further, each value of the width W and the thickness t of the metal plate 31 is, for example, 4.
5 mm and t is 0.5 mm. The material of the metal plate 31 is a heat-resistant conductive metal, for example, a springy Inconel plate (50 to 55% of nickel, 17 to 21% of chromium, and an alloy containing iron or the like). The metal plate 32 includes a front end portion 32a, a central portion 32b, and a base portion 32c, and has the same material and shape as the metal plate 31.
【００１１】なお、組立状態では、金属板３１の基部分
３１ｃがセラミック芯２０の凹部２２に嵌合し、金属板
３２の基部分３２ｃがセラミック芯２０の凹部２３に嵌
合するように配置される。金属板３１の先端部分３１ａ
と金属板３２の先端部分３２ａはろう付け前は互いに離
れているが、金属板３１と金属板３２とを湾曲させて先
端部分３１ａと先端部分３２ａとを当接させた状態で先
端部分３１ａと先端部分３２ａを導電性ある「銀ろう」
によりろう付けする。なお、前記ろう付けした後に基部
分３１ｃと基部分３２ｃとを上述のようにセラミック芯
２０に固定してもよいし、前記基部分３１ｃと基部分３
２ｃとを上述のようにセラミック芯２０に固定した後に
前記ろう付けをしてもよい。In the assembled state, the base portion 31c of the metal plate 31 is fitted in the recess 22 of the ceramic core 20, and the base portion 32c of the metal plate 32 is fitted in the recess 23 of the ceramic core 20. You. Tip portion 31a of metal plate 31
The tip 32a of the metal plate 32 and the tip 32a of the metal plate 32 are separated from each other before brazing. The tip portion 32a is made of conductive "silver solder"
Brazing with After the brazing, the base portion 31c and the base portion 32c may be fixed to the ceramic core 20 as described above, or the base portion 31c and the base portion 3 may be fixed.
2c may be fixed to the ceramic core 20 as described above and then brazed.
【００１２】この結果、先端部分３１ａと先端部分３２
ａとを離れさせる方向の残留応力が金属板３１、３２に
存在することになる。また、銀ろうのろう付け温度は、
その成分により異なるが、約６２０℃から８００℃であ
る。例えば、規格「ＢＡＧ１」のものでは、６２０〜７
６０℃となる。耐熱導電性より線３３（例えばニッケル
線）が金属板３１の基部分３１ｃにスポット溶接され、
耐熱導電性より線３４（例えばニッケル線）が金属板３
２の基部分３２ｃにスポット溶接されている。As a result, the tip portion 31a and the tip portion 32
Residual stress in the direction of separating from the metal plate 31 exists in the metal plates 31 and 32. The brazing temperature of silver braze is
It varies from about 620 ° C to 800 ° C, depending on the components. For example, in the case of the standard “BAG1”, 620 to 7
It will be 60 ° C. A heat-resistant conductive stranded wire 33 (for example, a nickel wire) is spot-welded to the base portion 31c of the metal plate 31,
The heat-resistant conductive stranded wire 34 (eg, nickel wire) is
The second base portion 32c is spot-welded.
【００１３】図２は第２の実施の形態を示している。図
２は（ａ）〜（ｄ）からなり、図２（ａ）は第２の実施
の形態の正面を示し、図２（ｂ）は図２（ａ）に示すも
ののＢ−Ｂ断面構造を示し、図２（ｃ）は第２の実施の
形態の一部分の正面を示し、図２（ｄ）は図２（ｃ）に
示すもののＣ−Ｃ断面構造を示している。FIG. 2 shows a second embodiment. 2A to 2D, FIG. 2A shows a front view of the second embodiment, and FIG. 2B shows a cross-sectional structure taken along the line BB of FIG. 2A. 2C shows a front view of a part of the second embodiment, and FIG. 2D shows a cross-sectional structure taken along the line CC of FIG. 2C.
【００１４】図２において、セラミック管４０はほぼ円
筒状であり、セラミック管４０の内面４１は基部４３か
ら先端４４まで貫通している。なお、４２はセラミック
管４０の外面である。耐熱絶縁性固定部材としてのセラ
ミック台５０は基部分５１と嵌合部分５２が一体に形成
されている。嵌合部分５２の外面５２ａの径はセラミッ
ク管４０の内面４１の径より若干小さく形成されてい
る。なお５２ｂは嵌合部分５２の先端である。孔５３及
び孔５４がセラミック台５０の基部分５１及び嵌合部分
５２を貫通するように形成され、凹部５５が基部分５１
に形成されている。嵌合部分５２の外面５２ａと内面４
１とを接着するために、外面５２ａと内面４１との間に
耐熱性無機接着材３５が充填されている。In FIG. 2, the ceramic tube 40 has a substantially cylindrical shape, and the inner surface 41 of the ceramic tube 40 extends from the base 43 to the tip 44. Reference numeral 42 denotes an outer surface of the ceramic tube 40. A ceramic base 50 as a heat-resistant insulating fixing member has a base portion 51 and a fitting portion 52 integrally formed. The diameter of the outer surface 52 a of the fitting portion 52 is formed slightly smaller than the diameter of the inner surface 41 of the ceramic tube 40. 52b is a tip of the fitting portion 52. A hole 53 and a hole 54 are formed so as to penetrate the base portion 51 and the fitting portion 52 of the ceramic base 50, and the recess 55 is formed in the base portion 51.
Is formed. Outer surface 52a and inner surface 4 of fitting portion 52
In order to bond the heat-resistant inorganic adhesive 1, the heat-resistant inorganic adhesive 35 is filled between the outer surface 52a and the inner surface 41.
【００１５】金属板６１は先端部分６１ａ，中央部分６
１ｂ及び基部分６１ｃからなり、組立前は図１（ｅ）に
示す金属板３１と同じ形状をしている。金属板６２は先
端部分６２ａ，中央部分６２ｂ及び基部分６２ｃからな
り、組立前は図１（ｅ）に示す金属板３１と同じ形状を
している。金属板６１、６２の材質は金属板３１と同じ
である。組立状態では、金属板６１の基部分６１ｃがセ
ラミック台５０の孔５３を挿通し、金属板６２の基部分
６２ｃがセラミック台５０の孔５４を挿通している。金
属板６１の先端部分６１ａと金属板６２の先端部分６２
ａのろう付けは上記第１の実施の形態と同様である。こ
のため、上記第１の実施の形態と同様の残留応力が金属
板６１、６２に存在している。The metal plate 61 has a tip portion 61a and a center portion 6a.
1b and a base portion 61c, which have the same shape as the metal plate 31 shown in FIG. The metal plate 62 includes a tip portion 62a, a central portion 62b, and a base portion 62c, and has the same shape as the metal plate 31 shown in FIG. The materials of the metal plates 61 and 62 are the same as those of the metal plate 31. In the assembled state, the base portion 61c of the metal plate 61 is inserted through the hole 53 of the ceramic base 50, and the base portion 62c of the metal plate 62 is inserted through the hole 54 of the ceramic base 50. Tip portion 61a of metal plate 61 and tip portion 62 of metal plate 62
The brazing of a is the same as in the first embodiment. Therefore, the same residual stress as in the first embodiment exists in the metal plates 61 and 62.
【００１６】耐熱導電性より線６３（例えばニッケル
線）が金属板６１の基部分６１ｃにスポット溶接され、
耐熱導電性より線６４（例えばニッケル線）が金属板６
２の基部分６２ｃにスポット溶接されている。図２
（ｂ）に示すように、前記接着剤３５が孔５３、５４及
び凹部５５内に充填されている。A heat-resistant conductive stranded wire 63 (eg, a nickel wire) is spot-welded to the base portion 61c of the metal plate 61,
The heat resistant conductive stranded wire 64 (eg, nickel wire) is
The second base portion 62c is spot-welded. FIG.
As shown in (b), the adhesive 35 is filled in the holes 53 and 54 and the recess 55.
【００１７】図３は第３の実施の形態を示している。図
３は（ａ）〜（ｄ）からなり、図３（ａ）は第３の実施
の形態の正面を示し、図３（ｂ）は図３（ａ）に示すも
ののＤ−Ｄ断面構造を示し、図３（ｃ）は第３の実施の
形態の一部分の正面を示し、図３（ｄ）は図３（ｃ）に
示すもののＥ−Ｅ断面構造を示している。FIG. 3 shows a third embodiment. 3A to 3D, FIG. 3A shows a front view of the third embodiment, and FIG. 3B shows a cross-sectional structure taken along line DD of FIG. 3A. 3C shows a front view of a part of the third embodiment, and FIG. 3D shows a cross-sectional structure taken along the line EE of FIG. 3C.
【００１８】図３において、セラミック管７０はほぼ円
筒状であり、セラミック管７０の内面７１は基部７３か
ら先端７４まで貫通している。なお、７２はセラミック
管７０の外面である。耐熱絶縁性固定部材としてのセラ
ミック芯８０は円柱状であり、セラミック芯８０の外面
８１の径はセラミック管７０の内面７１の径より若干小
さく形成されている。孔８２、８３がセラミック芯８０
に形成されている。なお、８４はセラミック芯８０の先
端である。セラミック芯８０の外面８１とセラミック管
７０の内面７１とを接着するために、外面８１と内面７
１との間及びセラミック管７０内のうちセラミック芯８
０の図３（ｂ）における図示右側に前記耐熱絶縁性無機
接着材３５が充填されている。In FIG. 3, the ceramic tube 70 has a substantially cylindrical shape, and an inner surface 71 of the ceramic tube 70 extends from a base 73 to a tip 74. Reference numeral 72 denotes an outer surface of the ceramic tube 70. The ceramic core 80 as a heat-resistant insulating fixing member has a cylindrical shape, and the diameter of the outer surface 81 of the ceramic core 80 is formed slightly smaller than the diameter of the inner surface 71 of the ceramic tube 70. The holes 82 and 83 have the ceramic core 80
Is formed. Reference numeral 84 denotes a tip of the ceramic core 80. In order to bond the outer surface 81 of the ceramic core 80 and the inner surface 71 of the ceramic tube 70, the outer surface 81 and the inner surface 7 are bonded.
1 and the ceramic core 8 in the ceramic tube 70.
The right side of FIG. 3B in FIG. 3B is filled with the heat-resistant insulating inorganic adhesive 35.
【００１９】金属板９１は先端部分９１ａ，中央部分９
１ｂ及び基部分９１ｃからなり、組立前は図１（ｅ）に
示す金属板３１と同じ形状をしている。金属板９２は先
端部分９２ａ，中央部分９２ｂ及び基部分９２ｃからな
り、組立前は図１（ｅ）に示す金属板３１と同じ形状を
している。金属板９１、９２の材質は金属板３１と同じ
である。なお、組立状態では、金属板９１の基部分９１
ｃがセラミック芯８０の孔８２を挿通し、金属板９２の
基部分９２ｃがセラミック芯８０の孔８３を挿通してい
る。金属板９１の先端部分９１ａと金属板９２の先端部
分９２ａのろう付けは上記第１の実施の形態のろう付け
と同様である。このため、上記第１の実施の形態と同様
の残留応力が金属板９１、９２内に存在している。耐熱
導電性より線９３（例えばニッケル線）が金属板９１の
基部分９１ｃにスポット溶接され、耐熱導電性より線９
４（例えばニッケル線）が金属板９２の基部分９２ｃに
スポット溶接されている。The metal plate 91 has a tip portion 91a and a center portion 9
1b and a base portion 91c, and have the same shape as the metal plate 31 shown in FIG. The metal plate 92 includes a tip portion 92a, a central portion 92b, and a base portion 92c, and has the same shape as the metal plate 31 shown in FIG. The materials of the metal plates 91 and 92 are the same as those of the metal plate 31. In the assembled state, the base portion 91 of the metal plate 91 is
c is inserted through the hole 82 of the ceramic core 80, and the base portion 92 c of the metal plate 92 is inserted through the hole 83 of the ceramic core 80. Brazing of the distal end portion 91a of the metal plate 91 and the distal end portion 92a of the metal plate 92 is the same as the brazing of the first embodiment. Therefore, the same residual stress as in the first embodiment exists in the metal plates 91 and 92. A heat-resistant conductive stranded wire 93 (for example, a nickel wire) is spot-welded to the base portion 91c of the metal plate 91 to form a heat-resistant conductive stranded wire 9
4 (eg, a nickel wire) is spot-welded to the base portion 92c of the metal plate 92.
【００２０】以上の構成により、前記第１の耐熱導電性
金属部材（金属板３１、６１、９１に相当する。）の基
部分（基部分３１ｃ、６１ｃ、９１ｃに相当する。）と
前記第２の耐熱導電性金属部材（金属板３２、６２、９
２に相当する。）の基部分（基部分３２ｃ、６２ｃ、９
２ｃに相当する。）が離れた状態にて、前記第１の耐熱
導電性金属部材の基部分及び前記第２の耐熱導電性金属
部材の基部分が耐熱絶縁性固定部材（セラミック芯２
０、８０又はセラミック台５０に相当する。）に固定さ
れているので、前記第１の耐熱性導電性金属部材の基部
分と前記第２の耐熱性導電性金属部材相互の基部分が互
いに絶縁された状態で相互の位置関係が固定されてい
る。With the above configuration, the base portion (corresponding to the base portions 31c, 61c, 91c) of the first heat-resistant conductive metal member (corresponding to the metal plates 31, 61, 91) and the second portion. Heat-resistant conductive metal members (metal plates 32, 62, 9)
Equivalent to 2. ) (Base portions 32c, 62c, 9)
2c. ) Are separated from each other, the base portion of the first heat-resistant conductive metal member and the base portion of the second heat-resistant conductive metal member are heat-resistant and insulating fixing members (ceramic core 2).
0, 80 or equivalent to the ceramic base 50. ), The positional relationship between the base portion of the first heat-resistant conductive metal member and the base portion of the second heat-resistant conductive metal member is fixed in a state where they are insulated from each other. ing.
【００２１】更に、前記第１の耐熱導電性金属部材の先
端部分（先端部分３１ａ、６１ａ、９１ａに相当す
る。）と前記第２の耐熱導電性金属部材の先端部分（先
端部分３２ａ、６２ａ、９２ａに相当する。）とを所定
のろう付け温度の「硬ろう」としての銀ろうでろう付け
しているので、前記第１の耐熱導電性金属部材の先端部
分と前記第２の耐熱導電性金属部材の先端部分が銀ろう
を介して電気的に接続されている。温度ヒューズの周囲
温度が銀ろうの前記所定のろう付け温度（溶融温度）ま
で上昇したときに、該銀ろうが溶融するため、前記第１
の耐熱導電性金属部材の先端部分と前記第２の耐熱導電
性金属部材の先端部分とが離れる方向の残留応力によ
り、前記第１の耐熱導電性金属部材の先端部分が矢印３
１ｘ、６１ｘ、９１ｘ方向に移動し、前記第２の耐熱導
電性金属部材の先端部分が矢印３２ｘ、６２ｘ、９２ｘ
方向に移動するので、前記第１の耐熱導電性金属部材の
先端部分と前記第２の耐熱導電性金属部材の先端部分は
互いに離れる（図１においては二点鎖線で示す金属板３
１、３２の状態になる）。このため、前記第１の耐熱導
電性金属部材と前記第２の耐熱導電性金属部材との間が
断線し、電気的に絶縁される。Further, the tip portions of the first heat-resistant conductive metal member (corresponding to the tip portions 31a, 61a, 91a) and the tip portions of the second heat-resistant conductive metal member (tip portions 32a, 62a, 92a) is brazed with silver brazing as a “hard brazing” at a predetermined brazing temperature, so that the tip portion of the first heat-resistant conductive metal member and the second heat-resistant conductive metal member are brazed. The tip of the metal member is electrically connected via a silver solder. When the ambient temperature of the thermal fuse rises to the predetermined brazing temperature (melting temperature) of the silver braze, the silver braze is melted.
The tip of the first heat-resistant conductive metal member has an arrow 3 due to the residual stress in the direction in which the tip of the heat-resistant conductive metal member is separated from the tip of the second heat-resistant conductive metal member.
1x, 61x, and 91x, and the tip of the second heat-resistant conductive metal member is pointed by an arrow 32x, 62x, 92x.
In this case, the distal end of the first heat-resistant conductive metal member and the distal end of the second heat-resistant conductive metal member are separated from each other (the metal plate 3 shown by a two-dot chain line in FIG. 1).
1, 32). Therefore, the first heat-resistant conductive metal member is disconnected from the second heat-resistant conductive metal member, and is electrically insulated.
【００２２】更に、金属板３１、６１、９１の形状及び
金属板３２、６２、９２の形状が帯状板であり、金属板
３１、６１、９１の表面と金属板３２、６２、９２の表
面とをろう付けしているので、金属板３１、６１、９１
と金属板３２、６２、９２を湾曲させて前記残留応力を
発生させること及び両者の先端のろう付けが容易にな
る。なお、上記各実施の形態においてインコネルが使用
されているが、これに限定されるものではなく、ＪＩＳ
Ｇ４９０２に規定されている耐食耐熱超合金も使用する
ことができる。また、硬ろうとして銀ろうを使用してい
るが、これに限定されず、硬ろうとして導電性あるアル
ミニュームろう（溶融温度約５２０〜５９０℃）を使用
することもできる。Further, the shapes of the metal plates 31, 61, 91 and the shapes of the metal plates 32, 62, 92 are strip-shaped plates, and the surfaces of the metal plates 31, 61, 91 and the surfaces of the metal plates 32, 62, 92 are different from each other. , The metal plates 31, 61, 91
And the metal plates 32, 62, and 92 are curved to generate the residual stress, and the tips of both ends are easily brazed. Although Inconel is used in each of the above embodiments, the present invention is not limited to this.
Corrosion-resistant and heat-resistant superalloys specified in G4902 can also be used. In addition, silver brazing is used as hard brazing, but the present invention is not limited to this, and a conductive aluminum brazing (melting temperature of about 520 to 590 ° C.) can be used as hard brazing.
【００２３】[0023]
【発明の効果】本願の第１の発明に係わる温度ヒューズ
によれば、第１の耐熱導電性金属部材の基部分と第２の
耐熱導電性金属部材の基部分が互いに絶縁された状態で
相互の位置関係が固定されている。更に、温度ヒューズ
の周囲温度が硬ろうの前記所定のろう付け温度（溶融温
度）まで上昇したときに、該硬ろうが溶融するので、前
記第１の耐熱導電性金属部材の先端部分と前記第２の耐
熱導電性金属部材の先端部分とが離れる方向の残留応力
により、前記第１の耐熱導電性金属部材の先端部分と前
記第２の耐熱導電性金属部材の先端部分が離れるため、
前記第１の耐熱導電性金属部材と前記第２の耐熱導電性
金属部材との間が断線し、電気的に絶縁される。このた
め、温度ヒューズの周囲温度が従来例より高温の所定値
（硬ろうの溶融温度）まで上昇すると、温度ヒューズが
電気回路を遮断することができる。この結果、温度ヒュ
ーズを使用することにより、発熱等により高温になる機
器の温度が過度に上昇することを防ぐことができる。According to the thermal fuse of the first aspect of the present invention, the base portion of the first heat-resistant conductive metal member and the base portion of the second heat-resistant conductive metal member are mutually insulated from each other. The positional relationship is fixed. Further, when the ambient temperature of the thermal fuse rises to the predetermined brazing temperature (melting temperature) of the hard solder, the hard solder is melted, so that the tip end of the first heat-resistant conductive metal member and the second solder are melted. 2 due to the residual stress in the direction in which the tip of the heat-resistant conductive metal member separates, the tip of the first heat-resistant conductive metal member is separated from the tip of the second heat-resistant conductive metal member.
The first heat-resistant conductive metal member is disconnected from the second heat-resistant conductive metal member, and is electrically insulated. For this reason, when the ambient temperature of the thermal fuse rises to a predetermined value (the melting temperature of the brazing solder) higher than the conventional example, the thermal fuse can cut off the electric circuit. As a result, by using the thermal fuse, it is possible to prevent the temperature of the device, which becomes high due to heat generation, from excessively rising.
【００２４】更に、第２の発明により、上記第１の発明
の効果とともに、前記第１の耐熱導電性金属部材の形状
及び前記第２の耐熱導電性金属部材の形状が帯状板であ
るので、前記第１の耐熱導電性金属部材と前記第２の耐
熱導電性金属部材を湾曲させること及び両者の先端のろ
う付けが容易になる。このため、上記第１の発明に係わ
る温度ヒューズの製造が容易となる。Further, according to the second invention, in addition to the effects of the first invention, the shape of the first heat-resistant conductive metal member and the shape of the second heat-resistant conductive metal member are band-like plates. The bending of the first heat-resistant conductive metal member and the second heat-resistant conductive metal member and the brazing of both ends are facilitated. This facilitates the manufacture of the thermal fuse according to the first aspect.
【図１】本願発明の第１の実施の形態の説明図である。FIG. 1 is an explanatory diagram of a first embodiment of the present invention.
【図２】本願発明の第２の実施の形態の説明図である。FIG. 2 is an explanatory diagram of a second embodiment of the present invention.
【図３】本願発明の第３の実施の形態の説明図である。FIG. 3 is an explanatory diagram of a third embodiment of the present invention.
【符号の説明】 ２０ セラミック芯 ２２、２３ セラミック芯の凹部 ３１、３２ 金属板 ３１ａ、３２ａ 金属板の先端部分 ３１ｃ、３２ｃ 金属板の基部分 ５０ セラミック台 ５３、５４ セラミック台の孔 ６１、６２ 金属板 ６１ａ、６２ａ 金属板の先端部分 ６１ｃ、６２ｃ 金属板の基部分 ８０ セラミック芯 ８２、８３ セラミック芯の孔 ９１、９２ 金属板 ９１ａ、９２ａ 金属板の先端部分 ９１ｃ、９２ｃ 金属板の基部分[Description of Signs] 20 Ceramic core 22, 23 Ceramic core recess 31, 32 Metal plate 31a, 32a Metal plate tip portion 31c, 32c Metal plate base 50 Ceramic table 53, 54 Ceramic table hole 61, 62 Metal Plates 61a, 62a Tip portions of metal plates 61c, 62c Base portions of metal plates 80 Ceramic cores 82, 83 Holes in ceramic cores 91, 92 Metal plates 91a, 92a Tip portions of metal plates 91c, 92c Base portions of metal plates
Claims (2)
と、弾性を有する第２の耐熱導電性金属部材と、耐熱絶
縁性固定部材とを具備し、 前記第１の耐熱導電性金属部材の先端部分と前記第２の
耐熱導電性金属部材の先端部分とが所定のろう付け温度
の硬ろうでろう付けされ、 前記第１の耐熱導電性金属部材の基部分と前記第２の耐
熱導電性金属部材の基部分が離れた状態にて、前記第１
の耐熱導電性金属部材の基部分及び前記第２の耐熱導電
性金属部材の基部分が前記耐熱絶縁性固定部材に固定さ
れ、 前記第１の耐熱導電性金属部材と前記第２の耐熱導電性
金属部材に前記第１の耐熱導電性金属部材の先端部分と
前記第２の耐熱導電性金属部材の先端部分とが離れる方
向の残留応力があることを特徴とする温度ヒューズ。A first heat-resistant conductive metal member having elasticity; a second heat-resistant conductive metal member having elasticity; and a heat-resistant insulating fixing member, wherein the first heat-resistant conductive metal member is provided. And a tip portion of the second heat-resistant conductive metal member are brazed with hard brazing at a predetermined brazing temperature, and a base portion of the first heat-resistant conductive metal member and the second heat-resistant conductive metal member. With the base portion of the conductive metal member separated, the first
The base portion of the heat-resistant conductive metal member and the base portion of the second heat-resistant conductive metal member are fixed to the heat-resistant insulating fixing member, and the first heat-resistant conductive metal member and the second heat-resistant conductive member are fixed to each other. A thermal fuse, wherein the metal member has a residual stress in a direction in which a tip portion of the first heat-resistant conductive metal member and a tip portion of the second heat-resistant conductive metal member are separated from each other.
び前記第２の耐熱導電性金属部材の形状が帯状板である
ことを特徴とする請求項１記載の温度ヒューズ。2. The thermal fuse according to claim 1, wherein the shape of the first heat-resistant conductive metal member and the shape of the second heat-resistant conductive metal member are strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP484098A JPH11204004A (en) | 1998-01-13 | 1998-01-13 | Thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP484098A JPH11204004A (en) | 1998-01-13 | 1998-01-13 | Thermal fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11204004A true JPH11204004A (en) | 1999-07-30 |
Family
ID=11594894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP484098A Pending JPH11204004A (en) | 1998-01-13 | 1998-01-13 | Thermal fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11204004A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014534584A (en) * | 2011-10-27 | 2014-12-18 | リテルヒューズ・インク | Fuse with insulation plug |
| US9202656B2 (en) | 2011-10-27 | 2015-12-01 | Littelfuse, Inc. | Fuse with cavity block |
| US9558905B2 (en) | 2011-10-27 | 2017-01-31 | Littelfuse, Inc. | Fuse with insulated plugs |
-
1998
- 1998-01-13 JP JP484098A patent/JPH11204004A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014534584A (en) * | 2011-10-27 | 2014-12-18 | リテルヒューズ・インク | Fuse with insulation plug |
| US9202656B2 (en) | 2011-10-27 | 2015-12-01 | Littelfuse, Inc. | Fuse with cavity block |
| US9558905B2 (en) | 2011-10-27 | 2017-01-31 | Littelfuse, Inc. | Fuse with insulated plugs |
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