JPH0723864Y2 - Thermal fuse - Google Patents
Thermal fuseInfo
- Publication number
- JPH0723864Y2 JPH0723864Y2 JP1954688U JP1954688U JPH0723864Y2 JP H0723864 Y2 JPH0723864 Y2 JP H0723864Y2 JP 1954688 U JP1954688 U JP 1954688U JP 1954688 U JP1954688 U JP 1954688U JP H0723864 Y2 JPH0723864 Y2 JP H0723864Y2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- thermal fuse
- point metal
- metal body
- lead wire
- 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 - Lifetime
Links
Landscapes
- Thermally Actuated Switches (AREA)
- Fuses (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は温度ヒューズの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a thermal fuse.
温度ヒューズとして、二本の絶縁被覆リード線の先端に
低融点金属体を接続し、該低融点金属体と各リード線端
部とを包囲せる樹脂モールド絶縁体を設け、該樹脂モー
ルド絶縁体上に定格、製造者名等を印刷したものが知ら
れている。As a thermal fuse, a low melting point metal body is connected to the tips of two insulation-coated lead wires, and a resin mold insulator that surrounds the low melting point metal body and each lead wire end is provided. It is known that the rating, the manufacturer's name, etc. are printed on.
この温度ヒューズにあっては、樹脂モールド絶縁体の部
分を保護すべき電気装置の所定面（例えば、トランスに
おいてはコイル外面）に添接し、リード線をその所定面
に巻付けたうえで同上電気装置のターミナルに接続し
て、温度ヒューズを電気装置の回路中に挿入してある。
従って、過電流により電気装置が発熱すると、その発生
熱が温度ヒューズの低融点金属体に伝達され、該低融点
金属体の溶断により当該電気装置への通電が遮断され
る。In this thermal fuse, the part of the resin mold insulator is attached to a predetermined surface of the electric device to be protected (for example, the outer surface of the coil in the transformer), the lead wire is wound around the predetermined surface, and then the same as above. A thermal fuse is inserted in the circuit of the electrical device, connected to the terminal of the device.
Therefore, when the electric device generates heat due to an overcurrent, the generated heat is transferred to the low-melting metal body of the temperature fuse, and the melting of the low-melting metal body cuts off the power supply to the electric device.
ところで、上記電気装置の発生熱が温度ヒューズの低融
点金属体に伝達される経路について考察すると、リード
線が絶縁被覆されており、リード線と電気装置との接触
面を介しての熱伝達はそれほど期待できないので、樹脂
モールド絶縁体と電気装置との接触面が熱伝達経路とし
て重要な意義を有するものと考えられる。By the way, considering the path through which the heat generated by the electric device is transferred to the low-melting-point metal body of the thermal fuse, the lead wire is insulated and the heat transfer through the contact surface between the lead wire and the electric device is Since it cannot be expected so much, it is considered that the contact surface between the resin mold insulator and the electric device has an important meaning as a heat transfer path.
しかしながら、従来の温度ヒューズにおいては、樹脂モ
ールド絶縁体上に定格等を印刷しており、その絶縁体厚
さを余り薄くすると印刷等の押印圧力で低融点金属体が
変形乃至は破断するので絶縁体厚さを約6.0mmとしてい
る。従って、樹脂モールド絶縁体表面から低融点金属体
に至までの熱抵抗が相当に高く、樹脂モールド絶縁体と
電気装置との接触面を介しての熱伝達性も余り期待でき
ない。而して、従来の上記温度ヒューズにおいては感熱
性に問題がある。However, in the conventional thermal fuse, the rating etc. are printed on the resin mold insulator, and if the insulator thickness is made too thin, the low melting point metal body will be deformed or ruptured by the imprinting pressure of printing etc. The body thickness is about 6.0 mm. Therefore, the thermal resistance from the surface of the resin mold insulator to the low melting point metal body is considerably high, and the heat transferability through the contact surface between the resin mold insulator and the electric device cannot be expected so much. Therefore, the conventional thermal fuse has a problem in heat sensitivity.
さらには、装着時に樹脂モールド絶縁体の部分を電気装
置の所定面に添接し、絶縁被覆リード線をその所定面に
巻付けるため絶縁被覆リード線を樹脂モールド絶縁体の
端部で折曲げられることが多い。かかる場合、樹脂モー
ルド絶縁体の端部と絶縁被覆リード線との境界部分に割
れあるいはクラックが生じ、温度ヒューズの動作劣化を
招くという恐れがあった。本考案の目的は、定格等を印
刷表示せる感熱性に秀れた温度ヒューズを提供すること
にある。In addition, when mounting, the resin-molded insulation part is attached to a predetermined surface of the electric device, and the insulation-coated lead wire is bent at the end of the resin-molded insulation material to wind the insulation-coated lead wire on the predetermined surface. There are many. In such a case, there is a risk that cracks or cracks may occur at the boundary between the end of the resin mold insulator and the insulating coating lead wire, leading to deterioration in the operation of the thermal fuse. An object of the present invention is to provide a thermal fuse having excellent heat sensitivity that can display and display ratings and the like.
本考案に係る温度ヒューズは、二本の絶縁被覆リード線
の先端部間に低融点金属体を接続し、該低融点金属体と
各リード線端部とを包囲して最大厚さ4.5mm以下の樹脂
モールド絶縁体を設け、印刷を施した熱収縮性樹脂のリ
ングを上記の樹脂モールド絶縁体上に該絶縁体近傍の絶
縁被覆リード線部分をも覆って装着したことを特徴とす
る構成である。The thermal fuse according to the present invention has a low melting point metal body connected between the tip ends of two insulation-coated lead wires, and surrounds the low melting point metal body and each lead wire end portion to have a maximum thickness of 4.5 mm or less. A resin-molded insulator is provided, and a ring of printed heat-shrinkable resin is mounted on the resin-molded insulator so as to cover the insulating coating lead wire portion near the insulator. is there.
以下、図面により本考案を説明する。 Hereinafter, the present invention will be described with reference to the drawings.
第１図は、本考案に係る温度ヒューズを示す一部欠截上
面説明図、第２図は第１図におけるＩ−Ｉ断面説明図で
ある。FIG. 1 is a partially cutaway top view showing a thermal fuse according to the present invention, and FIG. 2 is a sectional view taken along the line I-I in FIG.
第１図並びに第２図において、1,1は二本の絶縁被覆リ
ード線であり、絶縁被覆は絶縁チューブの挿通によって
施すこともできる。２はリード線1,1の先端部間に接続
した低融点金属体、例えばSn−Pb系合金体である。３は
低融点金属体の外面に塗布せるフラックスであり、低融
点金属体上に生じる酸化被膜を除去し、低融点金属体の
溶融並びに動作を助勢するものである。４は低融点金属
体並びにリード線端部を包囲して設けた樹脂モールド絶
縁体、例えば加熱硬化型エポキシ樹脂によるモールド絶
縁体でありディッピングにより形成できる。この樹脂モ
ールド絶縁体の最大厚みＴは4.5mm以下である。５は定
格、製造者名等を印刷表示せる熱収縮性樹脂（例えば厚
みＵは0.3mm以下の熱収縮性塩化ビニルフイルム）のリ
ングであり、加熱収縮により、樹脂モールド絶縁体４上
に該絶縁体４近傍の絶縁被覆リード線部分をも覆って装
着してある。In FIGS. 1 and 2, reference numerals 1 and 1 denote two insulating coated lead wires, and the insulating coating can be applied by inserting an insulating tube. Reference numeral 2 is a low melting point metal body, for example, a Sn-Pb alloy body connected between the tip ends of the lead wires 1 and 1. A flux 3 is applied to the outer surface of the low-melting-point metal body to remove an oxide film formed on the low-melting-point metal body and assist the melting and operation of the low-melting-point metal body. Reference numeral 4 denotes a resin mold insulator provided around the low melting point metal body and the end portion of the lead wire, for example, a mold insulator made of a thermosetting epoxy resin, which can be formed by dipping. The maximum thickness T of this resin mold insulator is 4.5 mm or less. Reference numeral 5 is a ring of a heat-shrinkable resin (for example, a heat-shrinkable vinyl chloride film having a thickness U of 0.3 mm or less) on which a rating, a manufacturer's name, etc. can be printed and displayed. It is also mounted so as to cover the insulating coated lead wire portion near the body 4.
本考案に係る温度ヒューズは、上述した通りの構成であ
り、樹脂モールド絶縁体の厚みを6.0mmの従来厚みから
4.5mm以下として極めて薄くしてあるから感熱性に秀れ
ている。The thermal fuse according to the present invention is configured as described above, and the thickness of the resin mold insulator is changed from the conventional thickness of 6.0 mm.
Since it is 4.5 mm or less and extremely thin, it has excellent heat sensitivity.
また、かかる薄厚化にもかかわらず、印刷済みの熱収縮
性樹脂のリングを樹脂モールド絶縁体に装着しており、
樹脂モールド絶縁体には直接印刷する必要がないから、
印刷圧力による低融点金属体の変形、損傷の懸念もな
い。又、モールド絶縁体の補強にも寄与する。Despite this reduction in thickness, a ring of printed heat-shrinkable resin is attached to the resin mold insulator,
Since it is not necessary to print directly on the resin mold insulator,
There is no concern about deformation or damage of the low melting point metal body due to printing pressure. It also contributes to the reinforcement of the mold insulator.
さらには、熱収縮性樹脂のリングを絶縁被覆リード線の
端部にまで被せているから、絶縁被覆リード線を折曲げ
る場合であっても、熱収縮性樹脂のリングの端部で絶縁
被覆リード線が折曲げられるため、前記樹脂モールド絶
縁体に損傷を与えることも無い。Further, since the heat-shrinkable resin ring is covered up to the end of the insulation-coated lead wire, even if the insulation-covered lead wire is bent, the insulation-coated lead is cut off at the end of the heat-shrinkable resin ring. Since the wire is bent, the resin-molded insulator is not damaged.
従って、本考案によれば、定格等の特性を明示した感熱
性に秀れた温度ヒューズを提供できる。Therefore, according to the present invention, it is possible to provide a thermal fuse excellent in heat sensitivity, which clearly shows characteristics such as rating.
第１図は本考案に係る温度ヒューズを示す一部欠截上面
説明図、第２図は第１図におけるＩ−Ｉ断面説明図であ
る。 1,1は絶縁被覆リード線、２は低融点金属体、４は樹脂
モールド絶縁体、５は熱収縮性樹脂のリングである。1 is a partially cutaway top view showing a thermal fuse according to the present invention, and FIG. 2 is a sectional view taken along the line I--I in FIG. 1, 1 is an insulating coating lead wire, 2 is a low melting point metal body, 4 is a resin mold insulator, and 5 is a ring of heat shrinkable resin.
Claims (1)
点金属体を接続し、該低融点金属体と各リード線端部と
を包囲して最大厚さ4.5mm以下の樹脂モールド絶縁体を
設け、印刷を施した熱収縮性樹脂のリングを上記の樹脂
モールド絶縁体上に該絶縁体近傍の絶縁被覆リード線部
分をも覆って装着したことを特徴とする温度ヒューズ。1. A resin mold having a maximum thickness of 4.5 mm or less, in which a low melting point metal body is connected between the tip ends of two insulating coated lead wires, and the low melting point metal body and each lead wire end portion are surrounded. A thermal fuse characterized in that an insulating body is provided and a printed ring of heat-shrinkable resin is mounted on the resin-molded insulating body so as to cover an insulating coating lead wire portion in the vicinity of the insulating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1954688U JPH0723864Y2 (en) | 1988-02-16 | 1988-02-16 | Thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1954688U JPH0723864Y2 (en) | 1988-02-16 | 1988-02-16 | Thermal fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01124637U JPH01124637U (en) | 1989-08-24 |
| JPH0723864Y2 true JPH0723864Y2 (en) | 1995-05-31 |
Family
ID=31235153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1954688U Expired - Lifetime JPH0723864Y2 (en) | 1988-02-16 | 1988-02-16 | Thermal fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723864Y2 (en) |
-
1988
- 1988-02-16 JP JP1954688U patent/JPH0723864Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01124637U (en) | 1989-08-24 |
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