JPH04249822A - Alloy type thermal fuse - Google Patents
Alloy type thermal fuseInfo
- Publication number
- JPH04249822A JPH04249822A JP41763390A JP41763390A JPH04249822A JP H04249822 A JPH04249822 A JP H04249822A JP 41763390 A JP41763390 A JP 41763390A JP 41763390 A JP41763390 A JP 41763390A JP H04249822 A JPH04249822 A JP H04249822A
- Authority
- JP
- Japan
- Prior art keywords
- case
- adhesive
- opening
- melting point
- low melting
- 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.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 title claims description 22
- 239000000956 alloy Substances 0.000 title claims description 22
- 239000000853 adhesive Substances 0.000 claims abstract description 46
- 230000001070 adhesive effect Effects 0.000 claims abstract description 46
- 238000002844 melting Methods 0.000 claims abstract description 32
- 229910000743 fusible alloy Inorganic materials 0.000 claims abstract description 31
- 230000008018 melting Effects 0.000 claims abstract description 30
- 230000004907 flux Effects 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 26
- 239000011247 coating layer Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Fuses (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は電気機器を過電流から保
護するために使用する合金型温度ヒュ−ズに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alloy type thermal fuse used to protect electrical equipment from overcurrent.
【０００２】0002
【従来の技術】電気機器を過電流から保護するために、
合金型温度ヒュ−ズを使用することがある。この合金型
温度ヒュ−ズは、一対のリード線間に低融点可溶合金片
を橋設し、該低融点可溶合金片上にフラックスを塗布し
、該フラックス被覆低融点可溶合金片をケースで包囲し
、ケース開口とリード線との間を接着剤で封止した構成
であり、保護すべき電気機器の所定箇所に取り付けて使
用される。[Prior Art] To protect electrical equipment from overcurrent,
Alloy type thermal fuses may be used. This alloy type thermal fuse bridges a pair of lead wires with a low melting point fusible alloy piece, coats the low melting point fusible alloy piece with flux, and then encases the flux coated low melting point fusible alloy piece. It has a structure in which the case opening and the lead wire are sealed with adhesive, and is used by being attached to a predetermined location of the electrical equipment to be protected.
【０００３】この合金型温度ヒュ−ズを取り付けた電気
機器においては、過電流が流れても、その際に発生する
熱で当該ヒューズが加熱されて低融点可溶合金片が溶融
され、この溶融金属がその表面張力に基づく球状化によ
って分断され、この分断により電気機器への通電が遮断
され、その電気機器の異常発熱が未然に防止される。[0003] In electrical equipment equipped with this alloy type thermal fuse, even if an overcurrent flows, the heat generated at that time heats the fuse and melts the low melting point fusible alloy piece, and this melting The metal is divided by spheroidization based on its surface tension, and this division cuts off the electricity to the electrical equipment, thereby preventing the electrical equipment from generating abnormal heat.
【０００４】合金型温度ヒュ−ズにおいては、低融点可
溶合金片を所定の温度で溶融させると共に溶融した合金
をその表面張力によって迅速に球状化させることが不可
欠である。而るに、低融点可溶合金片の表面に酸化皮膜
が生成するようなことがあれば、低融点可溶合金片をそ
の合金融点で溶融させ得ず、しかも、酸化皮膜が硬い表
皮となって溶融金属の球状化を阻止するから、合金型温
度ヒュ−ズの作動に重大な支障を招来する。このため、
低融点可溶合金片にフラックスを被覆して低融点可溶合
金片の酸化を防止している。In an alloy type thermal fuse, it is essential to melt a piece of a low melting point fusible alloy at a predetermined temperature and to quickly spheroidize the molten alloy due to its surface tension. However, if an oxide film is formed on the surface of the low-melting point fusible alloy piece, the low-melting point fusible alloy piece cannot be melted at the melting point, and moreover, the oxide film may form a hard surface. This prevents the molten metal from becoming spheroidized, resulting in a serious problem in the operation of the alloy type thermal fuse. For this reason,
The low melting point fusible alloy pieces are coated with flux to prevent the low melting point fusible alloy pieces from oxidizing.
【０００５】従来、合金型温度ヒュ−ズとして、図３に
示すように、互いに並行な絶縁被覆リード線２’，２’
の先端部に低融点可溶合金片３’を橋設し、該低融点可
溶合金片３’上にフラックス３１’を被覆し、このフラ
ックス被覆低融点可溶合金片を一側部開口１１’の扁平
ケース１’内に収納し、その開口１１’を接着剤４’で
封止し、各リード線２’の絶縁被覆層端２３’を接着剤
４’中に埋入したものが公知である。Conventionally, as shown in FIG. 3, insulated lead wires 2', 2' parallel to each other have been used as alloy type thermal fuses.
A low melting point fusible alloy piece 3' is bridged at the tip of the low melting point fusible alloy piece 3', and a flux 31' is coated on the low melting point fusible alloy piece 3'. It is known that the lead wire 2' is housed in a flat case 1', its opening 11' is sealed with an adhesive 4', and the ends 23' of the insulation coating layer of each lead wire 2' are embedded in the adhesive 4'. It is.
【０００６】このケースタイプの合金型温度ヒュ−ズに
おいては、リード線に絶縁被覆線を使用しているので、
該リード線を電気機器本体、例えば、トランスのコイル
上に巻着して合金型温度ヒュ−ズを電気機器に取着する
場合、その巻着したリード線が交差しても短絡を回避で
き、その巻着を容易に行い得る、ケース開口を封止した
接着剤表面でのリード線間の沿面絶縁強度を大きくでき
る等の利点がある。[0006] In this case type alloy type thermal fuse, an insulated wire is used for the lead wire, so
When attaching an alloy thermal fuse to an electrical device by winding the lead wires around the main body of the electrical device, for example, the coil of a transformer, short circuits can be avoided even if the wound lead wires cross each other. It has advantages such as being able to easily wrap the wire and increasing the creeping insulation strength between the lead wires on the surface of the adhesive that seals the case opening.
【０００７】[0007]
【発明が解決しようとする課題】上記図３に示す合金型
温度ヒュ−ズにおいて、接着剤４’によるケース開口１
１’の封止は、接着剤の滴下塗布によって行われ、接着
剤４’のケース開口１１’への浸透深さｂは、接着剤の
表面張力、接触角、ケース開口の厚み等によって定まっ
てしまい、例えば、接着剤がエポキシ樹脂で、ケース開
口厚みが２〜３ｍｍの場合では、３〜４ｍｍであって、
制限がある。Problem to be Solved by the Invention In the alloy type thermal fuse shown in FIG.
The sealing of 1' is performed by drip application of the adhesive, and the penetration depth b of the adhesive 4' into the case opening 11' is determined by the surface tension of the adhesive, the contact angle, the thickness of the case opening, etc. For example, if the adhesive is epoxy resin and the case opening thickness is 2 to 3 mm, the thickness is 3 to 4 mm,
There is a limit.
【０００８】この合金型温度ヒュ−ズにおいて、ケース
１’内からケース１’外への有効封止距離は、リード線
２’の導体２１’と絶縁被覆層２２’との間での充分な
接着状態が期待できないので、実質上、接着剤４’中の
リード線２’の裸導体部分２１０’で与えられることに
なる。而るに、リード線２’の絶縁被覆層端２３’を接
着剤４’に充分な深さで埋入して接着剤４’に強固に一
体化する必要があり、その必要な最小埋入深さをａ、上
記ケース開口１１’での接着剤浸透深さをｂとすれば、
上記の有効封止距離ｃは、ｃ＝ｂ−ａとなる。In this alloy type thermal fuse, the effective sealing distance from the inside of the case 1' to the outside of the case 1' is a sufficient distance between the conductor 21' of the lead wire 2' and the insulating coating layer 22'. Since a bonded state cannot be expected, it is essentially provided by the bare conductor portion 210' of the lead wire 2' in the adhesive 4'. Therefore, it is necessary to embed the end 23' of the insulating coating layer of the lead wire 2' into the adhesive 4' to a sufficient depth to firmly integrate it with the adhesive 4', and the required minimum embedding If the depth is a and the adhesive penetration depth at the case opening 11' is b,
The above effective sealing distance c is c=ba.
【０００９】温度ヒューズにおいては、作動するまでに
電気機器のヒートサイクルによって繰返し加熱を受け、
この繰返し加熱のために、低融点可溶合金片上のフラッ
クスが溶融流下して温度ヒューズの作動前に低融点可溶
合金片上にフラックスが存在しなくなっていることが起
こり得る。[0009] A thermal fuse is repeatedly heated by the heat cycle of electrical equipment before it is activated.
This repeated heating can cause the flux on the low melting point fusible alloy piece to melt and flow down such that no flux is present on the low melting point fusible alloy piece before actuation of the thermal fuse.
【００１０】而るに、図３に示す合金型温度ヒュ−ズに
おいては、ケース開口１１’での接着剤４’の有効封止
距離ｃを上記の制限のために長くとり得ず、かかる短い
封止距離のもとでは、上記電気機器のヒートサイクル下
での熱応力のためにシール性が失われて、ケース１’内
に外気が侵入し、フラックス被覆が喪失した低融点可溶
合金片の表面がこの侵入外気のために酸化されてしまい
、電気機器が過電流のために発熱しても、合金型温度ヒ
ュ−ズを作動させ得ず、当該電気機器を保護し得ないこ
とが起こり得る。However, in the alloy type thermal fuse shown in FIG. 3, the effective sealing distance c of the adhesive 4' at the case opening 11' cannot be made long due to the above-mentioned limitations, and such a short Under the sealing distance, the sealing performance was lost due to thermal stress under the heat cycle of the electrical equipment, and outside air entered the case 1', causing the low melting point fusible alloy piece to lose its flux coating. The surface of the fuse becomes oxidized due to the intrusion of outside air, and even if the electrical equipment generates heat due to overcurrent, the alloy type thermal fuse cannot operate and the electrical equipment cannot be protected. obtain.
【００１１】本発明の目的は上記ケースタイプの合金型
温度ヒュ−ズにおいて、ケース開口の接着剤に埋入され
る絶縁被覆リード線の裸導体部分の長さを長くすること
により有効封止距離を増大して、シール性を増強し、激
しいヒートサイクル下でも、ケース内への外気の侵入に
よる低融点可溶合金片の酸化を排除し、当該温度ヒュー
ズを正確に作動させることにある。An object of the present invention is to increase the effective sealing distance by increasing the length of the bare conductor portion of the insulated lead wire embedded in the adhesive in the case opening in the above-mentioned case type alloy type thermal fuse. The objective is to increase the sealing performance by increasing the temperature, eliminate oxidation of the low melting point fusible alloy pieces due to the intrusion of outside air into the case, and operate the thermal fuse accurately even under intense heat cycles.
【００１２】0012
【課題を解決するための手段】本発明の合金型温度ヒュ
−ズは一側部に開口を有するケースのその一側部の両脇
に断面コ字状の突出部が形成され、互いに並行な絶縁被
覆リード線の先端部に橋設されたフラックス被覆低融点
可溶合金片が上記ケース内に収容され、各絶縁被覆リー
ド線が上記の各突出部を経てケース外に引き出され、上
記ケースの開口が接着剤によって封止されると共に上記
の各突出部内に接着剤が入れられ、該接着剤中に各絶縁
被覆リード線端部の絶縁被覆層端が埋入されていること
を特徴とする構成である。[Means for Solving the Problems] The alloy type thermal fuse of the present invention has a case having an opening on one side, and protrusions having a U-shaped cross section are formed on both sides of the one side, and the protrusions are parallel to each other. A flux-coated low-melting-point fusible alloy piece bridged to the tip of the insulation-covered lead wire is housed in the case, and each insulation-covered lead wire is pulled out of the case through each of the above-mentioned protrusions. The opening is sealed with an adhesive, and the adhesive is placed inside each of the protrusions, and the end of the insulation coating layer of each insulation coating lead wire end is embedded in the adhesive. It is the composition.
【００１３】[0013]
【実施例】以下、本発明の実施例を図面により説明する
。図１は本発明において使用するケースの一例を示して
いる。図１において、１はプラスチック、例えばフェノ
ール樹脂、セラミック等から成形した扁平なケースであ
り、一側部１１が開口され、該一側部の両脇に断面コ字
状の突出部１２，１２が形成されている。このケースは
、通常射出成形、プレス成形・焼成等によって製造され
るが、一側部開口の扁平ケースを成形し、該ケースの一
側部中間をカッティングすることにより製造することも
できる。[Embodiments] Hereinafter, embodiments of the present invention will be explained with reference to the drawings. FIG. 1 shows an example of a case used in the present invention. In FIG. 1, reference numeral 1 denotes a flat case molded from plastic, such as phenol resin, ceramic, etc., with one side 11 open and protrusions 12, 12 having a U-shaped cross section on both sides of the one side. It is formed. This case is usually manufactured by injection molding, press molding, firing, etc., but it can also be manufactured by molding a flat case with an opening on one side and cutting the middle of one side of the case.
【００１４】図２は本発明の一実施例を示している。図
２において、１は前記した一側部１１が開口された扁平
ケースであり、１２，１２は断面コ字状の突出部を示し
ている。２は互いに並行な一対の絶縁被覆リード線であ
り、２１は導体を、２２は絶縁被覆層をそれぞれ示して
いる。３はリード線２，２の先端間に溶接により橋設し
た低融点可溶合金片、３１は低融点可溶合金片３上に被
覆したフラックスである。FIG. 2 shows one embodiment of the invention. In FIG. 2, numeral 1 is a flat case in which one side 11 described above is open, and numerals 12 and 12 indicate protrusions having a U-shaped cross section. 2 is a pair of insulated lead wires parallel to each other, 21 indicates a conductor, and 22 indicates an insulated coating layer. 3 is a low melting point fusible alloy piece bridged between the tips of the lead wires 2, 2 by welding, and 31 is a flux coated on the low melting point fusible alloy piece 3.
【００１５】これらのリード線２，２の先端部をケース
１内に収容し、フラックス３１を被覆した低融点可溶合
金片３をケース１で包囲し、リード線２，２を断面コ字
状の突出部１２，１２内を経てケース１外に引き出して
ある。４は接着剤、例えば、エポキシ樹脂であり、ケー
ス１の開口１１を封止すると共に断面コ字状の突出部１
２，１２内に充填してある。２３は絶縁被覆リード線２
の絶縁被覆層端であり、接着剤４に埋入してある。The tips of these lead wires 2, 2 are housed in a case 1, the low melting point fusible alloy piece 3 coated with flux 31 is surrounded by the case 1, and the lead wires 2, 2 are made into a U-shaped cross section. It is pulled out of the case 1 through the inside of the protruding parts 12, 12. 4 is an adhesive, for example, an epoxy resin, which seals the opening 11 of the case 1 and seals the protrusion 1 having a U-shaped cross section.
2, 12 are filled. 23 is the insulated lead wire 2
This is the end of the insulating coating layer and is embedded in the adhesive 4.
【００１６】上記実施例の合金型温度ヒュ−ズを製造す
るには、図１に示す開口部１１の両脇に断面コ字状の突
出部１２，１２を有するケース１を、前記した射出成形
、プレス成形或いはカッティング等により製作し、図２
に示すように、先端間に低融点可溶合金片３を溶接によ
り橋設し、その低融点可溶合金片３上にフラックス３１
を塗布した互いに並行な一対の絶縁被覆リード線２，２
のその低融点可溶合金片３をケース１内に収容し、リー
ド線２，２を断面コ字状の突出部１２，１２内を経てケ
ース１外に引き出す。In order to manufacture the alloy type thermal fuse of the above embodiment, the case 1 having the protrusions 12, 12 having a U-shaped cross section on both sides of the opening 11 shown in FIG. , manufactured by press molding or cutting, etc., as shown in Figure 2.
As shown in the figure, a low melting point fusible alloy piece 3 is bridged between the tips by welding, and a flux 31 is applied on the low melting point fusible alloy piece 3.
A pair of insulated lead wires 2, 2 parallel to each other coated with
The low melting point fusible alloy piece 3 is housed in the case 1, and the lead wires 2, 2 are drawn out of the case 1 through the inside of the protruding parts 12, 12 having a U-shaped cross section.
【００１７】この場合、低融点可溶合金片３が充分な挫
屈強度を有すれば、リード線２，２間の間隔をケース１
内の幅よりもやや広くして、低融点可溶合金片３の間隔
保持作用のもとでリード線２，２の曲げ弾性力によりリ
ード線先端部をケース１内に弾性的に固定することも可
能である。ケース１内にリード線２，２の先端部を収容
した後は、ケースの開口１１に接着剤、例えばエポキシ
樹脂を滴下塗布し、この塗布樹脂をその表面張力によっ
てケース開口１１に侵入させると共に突出部１２，１２
の断面コ字状内に侵入させ、この樹脂の硬化をまって合
金型温度ヒュ−ズの製造を終了する。In this case, if the low melting point fusible alloy piece 3 has sufficient buckling strength, the distance between the lead wires 2, 2 can be adjusted to the case 1.
The tip of the lead wire is elastically fixed within the case 1 by the bending elastic force of the lead wires 2, 2 under the spacing maintaining effect of the low melting point fusible alloy piece 3. is also possible. After the tips of the lead wires 2, 2 are accommodated in the case 1, an adhesive such as epoxy resin is applied dropwise to the opening 11 of the case, and the applied resin is caused to enter the case opening 11 and protrude due to its surface tension. Part 12, 12
The resin is introduced into the U-shaped cross section of the alloy, and the manufacturing of the alloy-type thermal fuse is completed after the resin is cured.
【００１８】上記において、ケース開口１１への接着剤
の侵入深さをｂ、接着剤の比重をρ、ケース開口１１の
厚みをｔ、接着剤の表面張力をｒ、接触角をθとすれば
、接着剤の重量ｂｔρと侵入接着剤の重力方向表面張力
成分２ｒｃｏｓθとの釣合いから、ｂｔρ＝２ｒｃｏｓ
θ，即ち、ｂ＝２ｒｃｏｓθ／ｔρである。従って、接
着剤を開口１１の入口から一定の深さまでにしか浸透さ
せ得ない。しかし、断面コ字状突出部１２内への接着剤
４の侵入は、断面コ字状の開放端１２１から行われ、こ
の断面コ字状の奥行きｅを上記ａよりも浅くすることに
よってこの断面コ字状突出部１２内をぼほ完全に容易に
接着剤４で充填できる。In the above, if the penetration depth of the adhesive into the case opening 11 is b, the specific gravity of the adhesive is ρ, the thickness of the case opening 11 is t, the surface tension of the adhesive is r, and the contact angle is θ. , from the balance between the weight of the adhesive btρ and the gravitational surface tension component 2rcosθ of the intruding adhesive, btρ=2rcos
θ, that is, b=2rcosθ/tρ. Therefore, the adhesive can only penetrate to a certain depth from the entrance of the opening 11. However, the adhesive 4 enters into the protrusion 12 having a U-shaped cross section from the open end 121 which has a U-shaped cross section, and by making the depth e of this U-shaped cross section shallower than a above, this cross section The inside of the U-shaped protrusion 12 can be almost completely filled with the adhesive 4 easily.
【００１９】図２において、リード線２における導体２
１と絶縁被覆層２２との間は気密性に乏しいが、リード
線２の裸導体部分２１０と接着剤４との間は、接着界面
のために優れた気密性を呈する。而るに、リード線２を
断面コ字状突出部１２を経て引出し、ケース開口の接着
剤４による封止と共にこの突出部１２内を接着剤４で充
填しているから、リード線２の接着剤４への埋入深さを
長くでき、従って、この埋入リード線部の裸導体部分２
１０を長くできるから、充分な気密性を付与できる。In FIG. 2, conductor 2 in lead wire 2
1 and the insulating coating layer 22, but between the bare conductor portion 210 of the lead wire 2 and the adhesive 4 exhibits excellent airtightness due to the adhesive interface. Since the lead wire 2 is drawn out through the protrusion 12 having a U-shaped cross section, and the case opening is sealed with the adhesive 4, the inside of the protrusion 12 is filled with the adhesive 4, so that the lead wire 2 is not bonded. The depth of embedding into the lead wire 4 can be increased, and the bare conductor portion 2 of this buried lead wire portion can be made longer.
10 can be made longer, so sufficient airtightness can be provided.
【００２０】従って、電気機器の苛酷なヒートサイクル
のもとでも、ケース１内の気密性をよく保証でき、ケー
ス１内の低融点可溶合金片３の酸化を確実に防止でき、
合金型温度ヒュ−ズを正確に作動させ得る。勿論、リー
ド線２の絶縁被覆層端２３を接着剤４中に埋入して強固
に固定してあるから、リード線２の絶縁被覆層２２と接
着剤４との界面剥離をよく防止でき、リード線２，２間
の優れた沿面耐電圧性を安定に維持できる。Therefore, even under severe heat cycles of electrical equipment, the airtightness within the case 1 can be well guaranteed, and the oxidation of the low melting point fusible alloy pieces 3 within the case 1 can be reliably prevented.
Alloy type thermal fuses can be operated accurately. Of course, since the end 23 of the insulating coating layer of the lead wire 2 is embedded in the adhesive 4 and firmly fixed, interfacial peeling between the insulating coating layer 22 of the lead wire 2 and the adhesive 4 can be well prevented. Excellent creeping voltage resistance between the lead wires 2 and 2 can be stably maintained.
【００２１】[0021]
【発明の効果】本発明の合金型温度ヒュ−ズは上述した
とおりの構成であり、ケースの開口側部の両脇に断面コ
字状の突出部を設け、この突出部内を経て絶縁被覆リー
ド線を引出し、ケースの開口側部を接着剤で封止すると
共に突出部内を接着剤で充填しているから、絶縁被覆リ
ード線を埋入せる接着剤部分の厚みを他の接着部分の厚
みよりも厚くでき、接着剤埋入リード線部分の裸導体部
分の長さを長くでき、封止距離を増大できる。従って、
激しいヒートサイクル下でも、ケースの気密性喪失に基
づく低融点可溶合金片の酸化を排除して合金型温度ヒュ
−ズを的確に作動させ得る。Effects of the Invention The alloy type thermal fuse of the present invention has the structure as described above, and has protrusions with a U-shaped cross section on both sides of the opening side of the case, and an insulated lead that passes through the protrusions. The wire is drawn out, the opening side of the case is sealed with adhesive, and the inside of the protrusion is filled with adhesive, so the thickness of the adhesive part where the insulated lead wire is embedded is greater than the thickness of other adhesive parts. The length of the bare conductor portion of the adhesive-embedded lead wire portion can be increased, and the sealing distance can be increased. Therefore,
Even under severe heat cycles, the alloy type thermal fuse can operate accurately by eliminating oxidation of the low melting point fusible alloy pieces due to loss of airtightness of the case.
【図１】本発明において使用するケースの一例を示す説
明図である。FIG. 1 is an explanatory diagram showing an example of a case used in the present invention.
【図２】本発明の実施例を示す説明図である。FIG. 2 is an explanatory diagram showing an embodiment of the present invention.
【図３】従来例を示す説明図である。FIG. 3 is an explanatory diagram showing a conventional example.
１ ケース １１ ケース開口 １２ 断面コ字状突出部 ２ 絶縁被覆リード線 ２３ 絶縁被覆層端 ３ 低融点可溶合金片 ３１ フラックス ４ 接着剤 1 Case 11 Case opening 12 U-shaped cross-sectional protrusion 2 Insulated lead wire 23 End of insulation coating layer 3 Low melting point fusible alloy piece 31 Flux 4 Adhesive
Claims (1)
側部の両脇に断面コ字状の突出部が形成され、互いに並
行な絶縁被覆リード線の先端部に橋設されたフラックス
被覆低融点可溶合金片が上記ケース内に収容され、各絶
縁被覆リード線が上記の各突出部を経てケース外に引き
出され、上記ケースの開口が接着剤によって封止される
と共に上記の各突出部内に接着剤が入れられ、該接着剤
中に各絶縁被覆リード線端部の絶縁被覆層端が埋入され
ていることを特徴とする合金型温度ヒュ−ズ。Claim 1: A case having an opening on one side, with protrusions having a U-shaped cross section formed on both sides of one side of the case, and a flux coating bridged over the tips of the insulated lead wires that are parallel to each other. A low melting point fusible alloy piece is housed in the case, each insulated lead wire is pulled out of the case through each of the above protrusions, the opening of the case is sealed with adhesive, and each of the above protrusions 1. An alloy type thermal fuse characterized in that an adhesive is placed inside the fuse, and an end of the insulation coating layer of each insulation coating lead wire end is embedded in the adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2417633A JP2511733B2 (en) | 1990-12-29 | 1990-12-29 | Alloy type temperature fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2417633A JP2511733B2 (en) | 1990-12-29 | 1990-12-29 | Alloy type temperature fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04249822A true JPH04249822A (en) | 1992-09-04 |
| JP2511733B2 JP2511733B2 (en) | 1996-07-03 |
Family
ID=18525709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2417633A Expired - Fee Related JP2511733B2 (en) | 1990-12-29 | 1990-12-29 | Alloy type temperature fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2511733B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57202033A (en) * | 1981-06-05 | 1982-12-10 | Sadayoshi Hagiwara | Overheat protecting element |
| JPH0216541U (en) * | 1988-07-15 | 1990-02-02 |
-
1990
- 1990-12-29 JP JP2417633A patent/JP2511733B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57202033A (en) * | 1981-06-05 | 1982-12-10 | Sadayoshi Hagiwara | Overheat protecting element |
| JPH0216541U (en) * | 1988-07-15 | 1990-02-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2511733B2 (en) | 1996-07-03 |
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