JP2561549B2 - How to use thermal fuse and thermal fuse - Google Patents
How to use thermal fuse and thermal fuseInfo
- Publication number
- JP2561549B2 JP2561549B2 JP2052190A JP5219090A JP2561549B2 JP 2561549 B2 JP2561549 B2 JP 2561549B2 JP 2052190 A JP2052190 A JP 2052190A JP 5219090 A JP5219090 A JP 5219090A JP 2561549 B2 JP2561549 B2 JP 2561549B2
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- low melting
- fusible alloy
- alloy piece
- thermal fuse
- 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.)
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Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は合金型温度ヒューズに関するものである。The present invention relates to an alloy type thermal fuse.
＜従来の技術＞ 合金型温度ヒューズは、一対のリード線間に低融点可
溶合金片を橋設し、低融点可溶合金片上にフラックスを
塗布し、この低融点可溶合金片をケースまたは絶縁層に
よって包囲した構成である。温度ヒューズは保護すべき
電気機器に取付けて使用される。而して、保護すべき電
気機器が故障して過電流のために発熱すると、その発生
熱によって温度ヒューズの低融点可溶合金片が溶融し、
該溶融金属が表面張力に基づく球状化によって分断し、
この分断により機器への通電を遮断して機器の破損を未
然に防止している。<Prior Art> In an alloy type thermal fuse, a low melting point fusible alloy piece is bridged between a pair of lead wires, flux is applied on the low melting point fusible alloy piece, and the low melting point fusible alloy piece is applied to a case or It is a structure surrounded by an insulating layer. Thermal fuses are used by mounting them on the electrical equipment to be protected. When the electrical equipment to be protected fails and generates heat due to overcurrent, the low melting point fusible alloy pieces of the thermal fuse are melted by the generated heat,
The molten metal is divided by spheroidization based on surface tension,
This division cuts off the power supply to the equipment to prevent damage to the equipment.
＜解決しようとする課題＞ ところで、従来においては、通常温度ヒューズの分断
作動後、機器の故障を修理し、温度ヒューズを更新した
のちに、機器を再使用に供している。しかしながら、温
度ヒューズの回路基板の導体のランドにハンダ付けする
ような場合、温度ヒューズの取替え更新は容易ではな
い。また、従来においては、更新後の温度ヒューズに更
新前温度ヒューズと同じ作動温度のものを使用してお
り、一度、最高限界温度にまで加熱された熱履歴の電気
機器が再度、同一の最高限度温度にまで加熱されること
になるので絶縁劣化の促進が避けられず、不安である。<Problems to be Solved> By the way, conventionally, after the disconnection operation of the normal temperature fuse, the failure of the device is repaired, the temperature fuse is updated, and then the device is reused. However, when soldering to the land of the conductor of the circuit board of the thermal fuse, replacement and renewal of the thermal fuse is not easy. Also, in the past, the thermal fuse after renewal had the same operating temperature as the pre-renewal thermal fuse, and once electrical equipment with a heat history heated to the maximum limit temperature had the same maximum limit again. Since it is heated to the temperature, it is unavoidable that acceleration of insulation deterioration cannot be avoided.
本発明の目的は、電気機器における温度ヒューズの更
新の容易化、機器再使用下での安全性の確保、更に、温
度ヒューズの製作の容易化等を図ることにある。An object of the present invention is to facilitate the renewal of a thermal fuse in an electric device, to ensure safety when the device is reused, and to facilitate the manufacture of the thermal fuse.
＜課題を解決するための手段＞ 第１発明に係る温度ヒューズの使用方法は、融点の異
なるｎ箇（ｎ≧２）の低融点可溶合金片を並設した温度
ヒューズの最高融点からｍ番目の融点の低融点可溶合金
片のみを機器に導通し、機器の過電流に基づく温度ヒュ
ーズ外部の発熱とそのｍ番目の融点の低融点可溶合金片
に流れる電流に基づく発熱とによる当該ｍ番目の融点の
低融点可溶合金片の溶断で機器への通電を遮断し、更
に、機器を補修し、上記温度ヒューズの（ｍ＋１）番目
の融点の低融点可溶合金片のみを機器に導通し、機器の
過電流に基づく温度ヒューズ外部の発熱とその（ｍ＋
１）番目の融点の低融点可溶合金片に流れる電流に基づ
く発熱とによる当該（ｍ＋１）番目の融点の低融点可溶
合金片の溶断で機器への通電を遮断することを、１番目
の融点の低融点可溶合金片からｎ番目の融点の低融点可
溶合金片についてまで順次に行うことを特徴とする構成
であり、第２発明に係る温度ヒューズは、この温度ヒュ
ーズの使用方法において使用する温度ヒューズであり、
ｎ本の軸方向穴を有する絶縁体の一端がキャップ状電極
の装着によって閉塞され、リード線先端に溶接された低
融点可溶合金片がリード線先端部と共に上記絶縁体の各
穴に収納され、しかも各低融点可溶合金片にフラックス
が被施され、かつ低融点可溶合金片の先端が上記キャッ
プ状電極の裏面に溶接され、絶縁体他端とリード線との
間が封止材で封止され、上記の各低融点可溶合金片が異
なる融点のものとされていることを特徴とする構成であ
る。<Means for Solving the Problems> The method of using the thermal fuse according to the first aspect of the present invention is that the n-th (n ≧ 2) low melting point fusible alloy pieces having different melting points are arranged side by side from the highest melting point of the thermal fuse. Only the low melting point fusible alloy piece having a melting point of the above is conducted to the device, and the m due to the heat generation outside the temperature fuse due to the overcurrent of the device and the heat generation based on the current flowing through the mth melting point low melting point alloy piece. The melting of the low melting point fusible alloy piece with the th melting point cuts off the power to the equipment, and the equipment is repaired, and only the (m + 1) th melting point of the low melting point fusible alloy piece of the above thermal fuse is conducted to the equipment. However, the heat generated outside the thermal fuse due to the overcurrent of the equipment and its (m +
The first is to cut off energization to the equipment by fusing the low melting point fusible alloy piece of the (m + 1) th melting point due to heat generation based on the current flowing through the low melting point fusible alloy piece of the first melting point. The thermal fuse according to the second aspect of the present invention is the method of using the thermal fuse according to the second aspect, wherein the melting point of the low melting point meltable alloy piece to the n-th melting point of the low melting point fusible alloy piece are sequentially performed. It is a thermal fuse to be used,
One end of an insulator having n axial holes is closed by mounting a cap-shaped electrode, and a low melting point fusible alloy piece welded to the tip of the lead wire is housed in each hole of the insulator together with the tip of the lead wire. Moreover, each low melting point fusible alloy piece is coated with flux, the tip of the low melting point fusible alloy piece is welded to the back surface of the cap-shaped electrode, and a sealing material is provided between the other end of the insulator and the lead wire. And the low melting point fusible alloy pieces have different melting points.
第３発明に係る温度ヒューズの使用方法は、上記第１
発明に対し、並設したｎ箇の低融点可溶合金片に更に抵
抗体を並設し、機器の過電流に基づく温度ヒューズ外部
の発熱に代え、機器の過電流に基づく抵抗体の発熱を利
用することを特徴とする構成であり、第４発明に係る温
度ヒューズは、この温度ヒューズの使用方法において使
用する温度ヒューズであり、ｎ本の軸方向穴を有する絶
縁体の一端がキャップ状電極の装着によって閉塞され、
同絶縁体の他端部外周にリング状電極が装着され、絶縁
体上に巻着された抵抗線の各端が上記の各電極に接続さ
れ、各リード線先端に溶接された低融点可溶合金片がリ
ード線先端部と共に上記絶縁体の各穴に収納され、しか
も各低融点可溶合金片にフラックスが被施され、かつ低
融点可溶合金片の先端が上記キャップ状電極の裏面に溶
接され、絶縁体他端とリード線との間が封止材で封止さ
れ、上記の各低融点可溶合金片が異なる融点のものとさ
れていることを特徴とする構成である。A method of using a thermal fuse according to a third aspect of the present invention is the above first aspect.
In contrast to the invention, a resistor is further arranged in parallel with n pieces of low melting point fusible alloy pieces arranged in parallel, and heat generated by the resistor is generated due to the overcurrent of the device instead of heat generation outside the temperature fuse due to the overcurrent of the device. A thermal fuse according to a fourth aspect of the present invention is a thermal fuse used in a method of using the thermal fuse, wherein one end of an insulator having n axial holes is a cap-shaped electrode. Is blocked by wearing
A ring-shaped electrode is attached to the outer periphery of the other end of the insulator, each end of the resistance wire wound on the insulator is connected to each of the above electrodes, and a low melting point fusible is welded to the tip of each lead wire. An alloy piece is housed in each hole of the above-mentioned insulator together with the lead wire tip, and flux is applied to each low melting point fusible alloy piece, and the tip of the low melting point fusible alloy piece is on the back surface of the cap-shaped electrode. It is welded and sealed between the other end of the insulator and the lead wire with a sealing material, and each of the low melting point fusible alloy pieces has a different melting point.
＜実施例の説明＞ 以下、図面により本発明の実施例について説明する。<Description of Embodiments> Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は第１発明において使用する温度ヒューズの一
例を示す説明図である。第１図において、11,12,…は並
設したｎ箇（ｎ≧２）の低融点可溶合金片であり、それ
ぞれ異なる融点を有し、全合金片の一端をリードフレー
ム２に溶接してある。21は共通リード線である。3,3…
は各低融点可溶合金片11,12…の他端に溶接したリード
線である。4,4…は各低融点可溶合金片11,12…上に塗布
したフラックス、５は全ての低融点可溶合金片11,12…
を包囲せる絶縁ケースである。６は絶縁ケースの一端と
共通リード線との間、絶縁ケースの他端とリード線との
間を封止せる封止材、例えばエポキシ樹脂である。FIG. 1 is an explanatory view showing an example of a thermal fuse used in the first invention. In FIG. 1, 11, 12, ... Are n (n ≧ 2) low melting point fusible alloy pieces arranged in parallel, each having a different melting point, and one end of all the alloy pieces is welded to the lead frame 2. There is. 21 is a common lead wire. 3,3 ...
Is a lead wire welded to the other end of each of the low melting point fusible alloy pieces 11, 12. 4 and 4 are fluxes applied on the low melting point fusible alloy pieces 11 and 12 and 5 are all low melting point fusible alloy pieces 11 and 12 ...
It is an insulating case that can be surrounded. Reference numeral 6 denotes a sealing material such as an epoxy resin that seals between one end of the insulating case and the common lead wire and between the other end of the insulating case and the lead wire.
第１発明を実施するには、第２図に示すように、保護
しようとする電子機器の回路基板Ａの一の導体ランド71
の孔に温度ヒューズの共通リード線21をハンダ付けし、
独立ランド72,73,74の孔に同ヒューズ他端の各リード線
3,…をハンダ付けし、使用する低融点可溶合金片のリー
ド線３の独立ランド72と他の導体ランド72′とをハンダ
付けにより導通する。この場合、機器の使用初期におい
ては、最も融点の高い低融点可溶合金片を使用する。而
るに、機器が故障して過電流が流れると、電子機器の発
熱とその最も融点の高い低融点可溶合金片に流れる電流
に基づくジュール発熱とにより当該低融点可溶合金片
（第１番目の低融点可溶合金片）がその融点にまで昇温
されて溶断され機器への通電が遮断される。この通電の
遮断下、機器を修理し、使用済みの上記最も融点の高い
低融点可溶合金片の次に融点の高い低融点可溶合金片他
端のリード線の独立ランド73と他の導体ランド73′とを
ハンダ付によって導通する。機器の修理後に使用する低
融点可溶合金片は温度ヒューズに内蔵されており、該温
度ヒューズのリード線が回路基板にハンダ付けされてい
て、新に温度ヒューズを回路基板に装着する必要がな
く、その次の低融点可溶合金片を使用するには、基板上
のランド間をハンダで導通するだけでよいから、作業が
至って簡単である。また、機器においては、最初の故障
による過電流発熱によって熱履歴を受け、初期の耐熱強
度に較べて耐熱強度の低下を免れ得ないが、その故障修
理後は、以前よりも低い最高限界温度で使用するので安
全である。To carry out the first invention, as shown in FIG. 2, one conductor land 71 of the circuit board A of the electronic device to be protected is used.
Solder the common lead wire 21 of the thermal fuse to the hole of
Lead wires at the other end of the fuse in the holes of independent lands 72, 73, 74
, 3 are soldered, and the independent land 72 of the lead wire 3 of the low melting point fusible alloy piece to be used and another conductor land 72 'are electrically connected by soldering. In this case, a low melting point fusible alloy piece having the highest melting point is used in the initial stage of using the device. Therefore, when a device fails and an overcurrent flows, the low melting point alloy piece (first melting point) is generated by the heat generation of the electronic device and Joule heat generation based on the current flowing through the low melting point melting alloy piece having the highest melting point. The second low melting point fusible alloy piece) is heated to its melting point and melted, cutting off the power supply to the equipment. Under this current interruption, the equipment is repaired, and the independent land 73 of the lead wire at the other end of the used low melting point fusible alloy piece with the next highest melting point and the other conductor The land 73 'is electrically connected by soldering. The low melting point fusible alloy piece used after repairing the equipment is built in the thermal fuse, and the lead wire of the thermal fuse is soldered to the circuit board, so there is no need to newly install the thermal fuse on the circuit board. In order to use the next low melting point fusible alloy piece, it suffices to conduct the solder between the lands on the substrate, and the work is extremely easy. In addition, the equipment suffers a thermal history due to overcurrent heat generation due to the first failure, and it is unavoidable that the heat resistance strength will be lower than the initial heat resistance strength. It is safe to use.
上記次ぎの低融点可溶合金片（第２番目の低融点可溶
合金片）が電子機器の過電流に基づく電子機器の発熱と
その低融点可溶合金片に流れる電流に基づくジュール発
熱とにより当該低融点可溶合金片がその融点にまで昇温
されて溶断され機器への通電が遮断されると、電子機器
を修理し、更に、第３番目の低融点可溶合金片のリード
線３の独立ランド74と他の導体ランド74′とをはんだ付
けにより導通し、第３番目の低融点可溶合金片の溶断に
より通電が遮断されると、電子機器を修理し、第４番目
の低融点可溶合金片以後についても以上と同様のことを
行っていく。The following low melting point fusible alloy piece (second low melting point fusible alloy piece) causes heat generation of the electronic device due to overcurrent of the electronic device and Joule heat generation due to current flowing through the low melting point fusible alloy piece. When the low melting point fusible alloy piece is heated to its melting point and melted and the power supply to the equipment is cut off, the electronic equipment is repaired, and the lead wire 3 of the third low melting point fusible alloy piece is repaired. When the independent land 74 and the other conductor land 74 'are electrically connected by soldering and the energization is cut off by the melting of the third low melting point fusible alloy piece, the electronic device is repaired and the fourth low The same operation as above is performed for the melting point-soluble alloy piece and thereafter.
上記において、温度関係を例示すれば、例えば、温度
ヒューズの低融点可溶合金片の箇数を３箇とし、第１番
目の低融点可溶合金片の融点を210℃、第２番目の低融
点可溶合金片の融点を205℃、第３番目の低融点可溶合
金片の融点を200℃とし、各低融点可溶合金片に流れる
電流に基づくジュール発熱による各低融点可溶合金片の
温度上昇を20℃とすれば、電子機器の第１番目の通電遮
断は電子機器の過電流に基づく発熱温度が190℃になっ
たときに行われ、電子機器の第２番目の通電遮断は電子
機器の過電流に基づく発熱温度が185℃になったときに
行われ、電子機器の第３番目の通電遮断は電子機器の過
電流に基づく発熱温度が180℃になったときに行われる
ことになる。In the above, if the temperature relationship is illustrated, for example, the number of low melting point fusible alloy pieces of the thermal fuse is 3, the melting point of the first low melting point fusible alloy piece is 210 ° C., and the second low melting point fusible alloy piece is 2nd low. The melting point of the melting point-soluble alloy piece is 205 ° C., the melting point of the third low-melting point melting alloy piece is 200 ° C., and each low-melting point alloy piece is caused by Joule heat generation based on the current flowing through each low-melting point alloy piece. Assuming the temperature rise of 20 ℃, the first disconnection of the electronic device is performed when the heat generation temperature due to the overcurrent of the electronic device reaches 190 ℃, and the second disconnection of the electronic device is It shall be performed when the heat generation temperature due to overcurrent of the electronic device reaches 185 ° C, and the third power interruption of the electronic device shall be performed when the heat generation temperature due to the overcurrent of the electronic device reaches 180 ° C. become.
第３図は第１発明で使用する温度ヒューズの別例を示
し、絶縁基板８上に膜状の数箇の独立電極91,…と共通
の電極92を設け、融点の異なる低融点可溶合金片11,12,
13…を各独立電極91と共通電極92との間に橋設し、各電
極91,…並びに92にリード線3,…並びに21を接続し、各
低融点可溶合金片上にフラックス４を塗布し、これらの
うえに絶縁層81を被覆した構成である。FIG. 3 shows another example of the thermal fuse used in the first invention, in which a plurality of film-like independent electrodes 91, ... And a common electrode 92 are provided on the insulating substrate 8, and a low melting point fusible alloy having different melting points. Piece 11,12,
13 ... is bridged between each independent electrode 91 and common electrode 92, lead wires 3, ... And 21 are connected to each electrode 91, ... And 92, and flux 4 is applied on each low melting point fusible alloy piece. However, the insulating layer 81 is covered on these.
第４図は第１発明で使用する温度ヒューズの他の別例
を示し、上記絶縁ケースに代え、樹脂のデッピング層50
を使用した構成である。FIG. 4 shows another example of the thermal fuse used in the first invention. Instead of the insulating case, a resin depping layer 50 is used.
It is a configuration using.
第５図は第２発明の一実施例を示す説明図である。第
５図において、Ｂは絶縁体、例えばセラミックス製であ
り、複数箇の軸方向穴b1,b2,b3…を設けてある。53は絶
縁体の一端に装着したキャップ状電極であり、上記の軸
方向穴を閉塞している。11,12,13…は低融点可溶合金
片、3,3,3…はリード線であり、先端に低融点可溶合金
片11,12,13…を溶接してある。これら低融点可溶合金片
の融点は互いに異ならしめてある。21はキャップ状電極
53にハンダ付けした共通リード線である。上記の各低融
点可溶合金片11,12,13…はリード線3,3,3…と共に絶縁
体Ｂの各軸方向穴b1,b2,b3…に挿入し、各低融点可溶合
金片11,12,13…の先端とキャップ状電極53の裏面とを圧
接させ、かかる圧接下でキャップ状電極53と共通リード
線21とをハンダ付けし、このハンダ付け熱で各低融点可
溶合金片11,12,13…をキャップ状電極53に溶接してあ
る。４は各低融点可溶合金片に被施したフラックスであ
る。この場合、各低融点可溶合金片にフラックスを塗布
し、この合金片をリード線と共に絶縁体の軸方向穴に挿
入すること、軸方向穴にフラックスを装填したのちに低
融点可溶合金片等を挿入すること、低融点可溶合金片を
挿入したのち、フラックスを装填することの何れの作業
順序によってもよい。６は各リード線と絶縁体の各軸方
向穴との間を封止した封止材である。第２発明に係る温
度ヒューズは、第１発明に係る方法によって使用され
る。FIG. 5 is an explanatory view showing an embodiment of the second invention. In FIG. 5, B is an insulator, for example, made of ceramics, and is provided with a plurality of axial holes b 1 , b 2 , b 3 ... Reference numeral 53 is a cap-shaped electrode attached to one end of the insulator, and closes the axial hole. 11, 12 and 13 are low melting point fusible alloy pieces, and 3, 3, 3 are lead wires, and low melting point fusible alloy pieces 11, 12 and 13 are welded to their tips. The melting points of these low melting point fusible alloy pieces are different from each other. 21 is a cap-shaped electrode
It is a common lead wire soldered to 53. The low melting point fusible alloy pieces 11, 12, 13 ... Are inserted into the axial holes b 1 , b 2 , b 3 ... of the insulator B together with the lead wires 3, 3 , 3, ... The tips of the molten alloy pieces 11, 12, 13 ... And the back surface of the cap-shaped electrode 53 are brought into pressure contact with each other, and the cap-shaped electrode 53 and the common lead wire 21 are soldered under such pressure welding, and each of the low melting points is caused by this soldering heat. The fusible alloy pieces 11, 12, 13 ... Are welded to the cap-shaped electrode 53. Reference numeral 4 is a flux applied to each low melting point fusible alloy piece. In this case, apply flux to each low melting point alloy piece and insert this alloy piece together with the lead wire into the axial hole of the insulator. After loading the axial hole with flux, the low melting point alloy piece Etc. may be inserted, a low melting point fusible alloy piece may be inserted, and then a flux may be loaded. 6 is a sealing material that seals between each lead wire and each axial hole of the insulator. The thermal fuse according to the second invention is used by the method according to the first invention.
第６図は、第３発明に係る温度ヒューズの使用方法に
おいて使用される温度ヒューズの一例を示す説明図であ
り、互に融点の異なる数箇の低融点可溶合金片11,12,13
…を並設し、これらに更に抵抗体10を併設し、数箇の低
融点可溶合金片11,12,13…の一端と抵抗体10との間を連
結フレーム92によって結線し、低融点可溶合金片11,12,
13…の他端並びに抵抗体10の他端にそれぞれリード線3,
3…並びに30を接続し、各低融点可溶合金片11,12,13…
上にフラックス４を塗布し、全ての低融点可溶合金片1
1,12,13…並びに抵抗体10を絶縁ケース５で包囲し、各
リード線3,3…並びに30を絶縁ケース５から引出し、絶
縁ケース５の開口と全リード線との間を封止材６で封止
した構成である。FIG. 6 is an explanatory view showing an example of the thermal fuse used in the method of using the thermal fuse according to the third invention, in which several low melting point fusible alloy pieces 11, 12, 13 having mutually different melting points are used.
... are arranged side by side, and the resistor 10 is additionally provided on them, and one end of several low melting point fusible alloy pieces 11, 12, 13 ... and the resistor 10 are connected by a connecting frame 92 to form a low melting point. Fusible alloy pieces 11,12,
At the other end of 13 ... and the other end of the resistor 10, lead wires 3,
3 and 30 are connected to each other, and each low melting point fusible alloy piece 11, 12, 13 ...
Apply flux 4 on top, and all low melting point fusible alloy pieces 1
1, 12 and 13 and the resistor 10 are surrounded by the insulating case 5, and the lead wires 3, 3 and 30 are pulled out from the insulating case 5, and a sealing material is provided between the opening of the insulating case 5 and all the lead wires. It is the structure sealed with 6.
第７図は第３発明において使用する温度ヒューズの別
例を示し、絶縁基板８上に膜状の共通の電極92と複数箇
の独立電極91,…を設け、互いに融点の異なる低融点可
溶合金片11,12,13…のそれぞれを共通電極92とそれぞれ
の独立電極91,…との間に橋設し、共通電極92と１箇の
独立電極91との間に膜抵抗10を設け、各独立の電極にリ
ード線3,3…並びに30を接続し、各低融点可溶合金片11,
12,13…上にフラックス４を塗布し、絶縁基板８上に絶
縁被覆81を設けた構成である。FIG. 7 shows another example of the thermal fuse used in the third invention. A common electrode 92 in the form of a film and a plurality of independent electrodes 91, ... Each of the alloy pieces 11, 12, 13, ... Is bridged between the common electrode 92 and each of the independent electrodes 91, .., and the film resistance 10 is provided between the common electrode 92 and one independent electrode 91. Lead wires 3, 3 ... And 30 are connected to each independent electrode, and each low melting point fusible alloy piece 11,
Flux 4 is applied onto 12, 13, ... And an insulating coating 81 is provided on the insulating substrate 8.
上記第３発明に係る温度ヒューズの使用方法において
は、付設するべき電気機器に過電流が流れると、抵抗体
にもその過電流が流れて抵抗体が発熱し、その発生熱と
低融点可溶合金片に流れる電流に基づくジュール発熱と
により低融点可溶合金片がその融点にまで昇温されて溶
断され機器への通電が遮断される。この場合も機器修理
後の低融点可溶合金片の更新は第１発明の場合と同様に
行なわれ、更新の度に機器の最高使用限界温度が更新前
よりも低く設定される。In the method of using the thermal fuse according to the third aspect of the present invention, when an overcurrent flows through the electric device to be attached, the overcurrent also flows through the resistor, causing the resistor to generate heat, and the generated heat and the melting point of the low melting point are melted. Due to Joule heat generated by the current flowing through the alloy piece, the low-melting point meltable alloy piece is heated to its melting point and melted to cut off the power supply to the equipment. In this case as well, the low melting point fusible alloy piece is renewed after the equipment is repaired in the same manner as in the first aspect of the invention, and the maximum usable temperature limit of the equipment is set lower than before the renewal each time the renewal is performed.
第８図は第４発明の一実施例を示す説明図である。 FIG. 8 is an explanatory view showing one embodiment of the fourth invention.
第８図において、Ｂは絶縁体、b1,b2,b3…は絶縁体に設
けた複数箇の軸方向穴、53はキャップ状電極、11,12,13
…は互いに融点を異ならしめた低融点可溶合金片、3,3
…は各低融点可溶合金片11,12,13…に溶接したリード
線、４はフラックスであり、それらの構成は上記第２発
明について説明したものと同じである。54は絶縁体Ｂの
他端に装着したリング状電極、10は絶縁体Ｂ上に巻着し
た抵抗線であり、この抵抗線をリング状電極54並びにキ
ャップ状電極53とに接続してある。６は絶縁体の各軸方
向穴と各リード線との間を封止した封止材、60は全体に
被覆した絶縁層である。In FIG. 8, B is an insulator, b 1 , b 2 , b 3 ... are a plurality of axial holes provided in the insulator, 53 is a cap-shaped electrode, 11, 12, 13
… Low melting point alloy pieces with different melting points, 3,3
Is a lead wire welded to each of the low melting point fusible alloy pieces 11, 12, 13 ... and 4 is a flux, and the construction thereof is the same as that described in the second invention. 54 is a ring-shaped electrode attached to the other end of the insulator B, and 10 is a resistance wire wound on the insulator B, and this resistance wire is connected to the ring-shaped electrode 54 and the cap-shaped electrode 53. 6 is a sealing material that seals between each axial hole of the insulator and each lead wire, and 60 is an insulating layer that covers the whole.
＜発明の効果＞ 本願発明に係る温度ヒューズの使用方法によれば、機
器の故障に基づく温度ヒューズの溶断作動ごとに温度ヒ
ューズを取替える必要がなく、既に取付けてある温度ヒ
ューズの低融点可溶合金片を機器の回路に組込結線する
だけでよく作業が容易であり、また、機器の修理のごと
に機器の使用最高限界温度を低くできるので、機器の故
障時加熱による耐熱強度の低下にもかかわらず、機器を
安全に使用継続できる。また、本願発明に係る温度ヒュ
ーズにおいては、本願発明に係る方法に使用でき、しか
も、キャツプ状電極の加熱により、全ての低融点可溶合
金片をキャップ状電極に一挙に溶接でき、低融点可溶合
金片の使用箇数が多くなっても、その製造容易製を維持
できる。<Advantages of the Invention> According to the method of using the thermal fuse according to the present invention, it is not necessary to replace the thermal fuse each time the thermal fuse is blown out due to a device failure, and the low melting point fusible alloy of the thermal fuse already installed. It is easy to work by simply connecting one piece to the circuit of the equipment, and the maximum operating temperature limit of the equipment can be lowered every time the equipment is repaired. Nevertheless, the device can be used safely safely. Further, the thermal fuse according to the present invention can be used in the method according to the present invention, and furthermore, by heating the cap-shaped electrode, all the low melting point fusible alloy pieces can be welded to the cap-shaped electrode all at once, and a low melting point is possible. Even if the number of molten alloy pieces used is large, the easy manufacture can be maintained.
第１図は第１発明において使用する温度ヒューズの一例
を示す説明図、第２図は第１発明を示すための説明図、
第３図、第４図及び第５図は第１発明において使用する
上記とは別の異なる温度ヒューズの例を示す説明図、第
６図、第７図及び第８図は第３発明において使用する異
なる温度ヒューズの例を示す説明図である。 11,12,13……低融点可溶合金片、21,3……リード線、10
……抵抗体または抵抗線、４……フラックス、５……ケ
ース、Ｂ……絶縁体、b1,b2,b3……軸方向穴、６……封
止材、８、81……絶縁材。FIG. 1 is an explanatory view showing an example of a thermal fuse used in the first invention, FIG. 2 is an explanatory view showing the first invention,
FIGS. 3, 4, and 5 are explanatory views showing an example of a different thermal fuse different from the above used in the first invention, and FIGS. 6, 7, and 8 are used in the third invention. It is explanatory drawing which shows the example of the different temperature fuse. 11,12,13 …… Low melting point fusible alloy pieces, 21,3 …… Lead wire, 10
...... Resistor or resistance wire, 4 ...... Flux, 5 …… Case, B …… Insulator, b 1 , b 2 , b 3 …… Axial hole, 6 …… Sealant, 8, 81 …… Insulating material.
Claims (4)
合金片を並設した温度ヒューズの最高融点からｍ番目の
融点の低融点可溶合金片のみを機器に導通し、機器の過
電流に基づく温度ヒューズ外部の発熱とそのｍ番目の融
点の低融点可溶合金片に流れる電流に基づく発熱とによ
る当該ｍ番目の融点の低融点可溶合金片の溶断で機器へ
の通電を遮断し、更に、機器を補修し、上記温度ヒュー
ズの最高融点から（ｍ＋１）番目の融点の低融点可溶合
金片のみを機器に導通し、機器の過電流に基づく温度ヒ
ューズ外部の発熱とその（ｍ＋１）番目の融点の低融点
可溶合金片に流れる電流に基づく発熱とによる当該（ｍ
＋１）番目の融点の低融点可溶合金片の溶断で機器への
通電を遮断することを、１番目の融点の低融点可溶合金
片からｎ番目の融点の低融点可溶合金片についてまで順
次に行うことを特徴とする温度ヒューズの使用方法。1. A n-th (n ≧ 2) low melting point fusible alloy piece having a different melting point is arranged in parallel, and only the low melting point fusible alloy piece of the mth melting point from the highest melting point is conducted to the device. The fusing of the low melting point fusible alloy piece of the m-th melting point due to the heat generation outside the temperature fuse based on the overcurrent of the apparatus and the heat generation based on the current flowing in the low melting point fusible alloy piece of the mth melting point Turn off the power, repair the equipment, and conduct only the low melting point fusible alloy piece with the melting point (m + 1) th from the highest melting point of the thermal fuse to the equipment. And the (m + 1) th melting point of the low melting point fusible alloy piece due to the heat generated by the current (m
+1) Cutting off energization to the equipment by melting the low melting point fusible alloy piece with the melting point from the first melting point low melting point alloy piece to the nth melting point low melting point fusible alloy piece A method of using a thermal fuse, which is characterized in that it is carried out sequentially.
おいて使用する温度ヒューズであり、ｎ本の軸方向穴を
有する絶縁体の一端がキャップ状電極の装着によって閉
塞され、リード線先端に溶接された低融点可溶合金片が
リード線先端部と共に上記絶縁体の各穴に収納され、し
かも各低融点可溶合金片にフラックスが被施され、かつ
低融点可溶合金片の先端が上記キャップ状電極の裏面に
溶接され、絶縁体他端とリード線との間が封止材で封止
され、上記の各低融点可溶合金片が異なる融点のものと
されていることを特徴とする温度ヒューズ。2. A thermal fuse used in the method of using a thermal fuse according to claim 1, wherein one end of an insulator having n axial holes is closed by mounting a cap-shaped electrode, and the end of the lead wire is attached. The welded low melting point fusible alloy piece is housed in the holes of the above-mentioned insulator together with the lead wire tip, and the low melting point fusible alloy piece is fluxed, and the tip of the low melting point fusible alloy piece is It is welded to the back surface of the cap-shaped electrode, and is sealed between the other end of the insulator and the lead wire with a sealing material, and each of the low melting point fusible alloy pieces has a different melting point. And thermal fuse.
合金片と抵抗体とを並設した温度ヒューズの抵抗体を常
に機器に導通し、低融点可溶合金片においては最高融点
からｍ番目の融点の低融点可溶合金片のみを機器に導通
し、機器の過電流に基づく抵抗体の発熱とそのｍ番目の
融点の低融点可溶合金片に流れる電流に基づく発熱とに
よる当該ｍ番目の融点の低融点可溶合金片の溶断で機器
への通電を遮断し、更に、機器を補修し、上記温度ヒュ
ーズの最高融点から（ｍ＋１）番目の融点の低融点可溶
合金片のみを機器に導通し、機器の過電流に基づく抵抗
体の発熱とその（ｍ＋１）番目の融点の低融点可溶合金
片に流れる電流に基づく発熱とによる当該（ｍ＋１）番
目の融点の低融点可溶合金片の溶断で機器への通電を遮
断することを、１番目の融点の低融点可溶合金片からｎ
番目の融点の低融点可溶合金片についてまで順次に行う
ことを特徴とする温度ヒューズの使用方法。3. A resistance element of a thermal fuse in which n pieces (n ≧ 2) of low melting point fusible alloy pieces having different melting points and a resistance element are arranged in parallel is always connected to a device, and in the low melting point fusible alloy piece, Only the low melting point fusible alloy piece with the melting point mth from the highest melting point is conducted to the equipment, and the heat generated by the resistor due to the overcurrent of the equipment and the heat generation based on the current flowing through the low melting point fusible alloy piece with the mth melting point. The melting of the low melting point fusible alloy piece of the mth melting point is cut off by energizing the equipment, and the equipment is repaired, and the low melting point melting point of the (m + 1) th melting point from the highest melting point of the thermal fuse is melted. Only the alloy piece is conducted to the equipment, and the heat generation of the resistor due to the overcurrent of the equipment and the heat generation based on the current flowing through the low melting point fusible alloy piece of the (m + 1) th melting point of the (m + 1) th melting point To cut off the power to the equipment by melting the low melting point alloy piece n from the low-melting fusible alloy piece of the eye of the melting point
A method of using a thermal fuse, characterized in that the steps up to the low melting point fusible alloy piece having the second melting point are sequentially performed.
おいて使用する温度ヒューズであり、ｎ本の軸方向穴を
有する絶縁体の一端がキャップ状電極の装着によって閉
塞され、同絶縁体の他端部外周にリング状電極が装着さ
れ、絶縁体上に巻着された抵抗線の各端が上記の各電極
に接続され、各リード線先端に溶接された低融点可溶合
金片がリード線先端部と共に上記絶縁体の各穴に収納さ
れ、しかも各低融点可溶合金片にフラックスが被施さ
れ、かつ低融点可溶合金片の先端が上記キャップ状電極
の裏面に溶接され、絶縁体他端とリード線との間が封止
材で封止され、上記の各低融点可溶合金片が異なる融点
のものとされていることを特徴とする温度ヒューズ。4. A thermal fuse used in the method of using a thermal fuse according to claim 3, wherein one end of an insulator having n axial holes is closed by mounting a cap-shaped electrode, A ring-shaped electrode is attached to the outer periphery of the other end, each end of the resistance wire wound on an insulator is connected to each of the above electrodes, and a low melting point fusible alloy piece welded to the tip of each lead wire leads. It is housed in each hole of the insulator together with the wire tip, and flux is applied to each low melting point fusible alloy piece, and the tip of the low melting point fusible alloy piece is welded to the back surface of the cap-shaped electrode for insulation. A thermal fuse, characterized in that the other end of the body and a lead wire are sealed with a sealing material, and the low melting point fusible alloy pieces have different melting points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2052190A JP2561549B2 (en) | 1990-03-03 | 1990-03-03 | How to use thermal fuse and thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2052190A JP2561549B2 (en) | 1990-03-03 | 1990-03-03 | How to use thermal fuse and thermal fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03254034A JPH03254034A (en) | 1991-11-13 |
| JP2561549B2 true JP2561549B2 (en) | 1996-12-11 |
Family
ID=12907879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2052190A Expired - Fee Related JP2561549B2 (en) | 1990-03-03 | 1990-03-03 | How to use thermal fuse and thermal fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2561549B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5923430A (en) * | 1982-07-30 | 1984-02-06 | 松本 光規 | Fuse and fuse box |
-
1990
- 1990-03-03 JP JP2052190A patent/JP2561549B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03254034A (en) | 1991-11-13 |
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