JP2008204832A - Resistor with temperature fuse - Google Patents

Resistor with temperature fuse Download PDF

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JP2008204832A
JP2008204832A JP2007040160A JP2007040160A JP2008204832A JP 2008204832 A JP2008204832 A JP 2008204832A JP 2007040160 A JP2007040160 A JP 2007040160A JP 2007040160 A JP2007040160 A JP 2007040160A JP 2008204832 A JP2008204832 A JP 2008204832A
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resistor
thermal fuse
leg
conductor
cap
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Izumi Sakai
和泉 酒井
Yasuhiko Tomitaka
康彦 冨高
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Uchihashi Estec Co Ltd
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Uchihashi Estec Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To improve creep-resistance stability at a mounting soldering spot of a resistor with a temperature fuse by achieving a reduction in case height while ensuring prevention of thermal damage of a temperature fuse during mounting soldering to a circuit board in the resistor with the temperature fuse. <P>SOLUTION: A first resistor 21, a second resistor 22, and a temperature fuse 30 are arranged in parallel with each other in an insulating outer cover while being arranged in a direction that the longitudinal direction of the resistors and that of the outer cover are aligned with each other. One lead conductor 3a of the temperature fuse is joined to one cap-shaped electrode end face of the first resistor 21. The other lead conductor 3b is joined to one cap-shaped electrode end face of the second resistor 22. A leg conductor (A) is joined to the other cap-shaped electrode end face of the first resistor. A leg conductor (B) is joined to the other cap-shaped electrode end face of the second resistor. The leg conductors are protruded from the lower face of the outer cover. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は温度ヒューズ付き抵抗器に関するものである。   The present invention relates to a resistor with a thermal fuse.

温度ヒューズ付き抵抗器は、例えば突入電流制限回路等の回路素子として使用され、過電流により抵抗器が許容温度にまで昇温されると、温度ヒューズの作動により通電が遮断されて火災等の事故発生が未然に防止される。   A resistor with a thermal fuse is used as a circuit element such as an inrush current limiting circuit. When the resistor is heated to an allowable temperature due to overcurrent, the energization is interrupted by the operation of the thermal fuse, causing an accident such as a fire. Occurrence is prevented in advance.

図5は、従来の温度ヒューズ付き抵抗器を示し(特許文献1)、図5の(イ)は縦断面図を、図5の(ロ)は図5の(イ)におけるロ−ロ断面図をそれぞれ示している。
実開昭48−105038号公報
5 shows a conventional resistor with a thermal fuse (Patent Document 1). FIG. 5 (a) is a longitudinal sectional view, and FIG. 5 (b) is a cross-sectional view of FIG. 5 (a). Respectively.
Japanese Utility Model Publication No. 48-105038

図5において、1’は一側面開放のセラミックスケースである。2’は抵抗器、3’は温度ヒューズであり、抵抗器一端のリード導体2a’と温度ヒューズ一端のリード導体3a’とを接続したうえでこれらをケース1’内に収容し、抵抗器他端のリード導体2b’及び温度ヒューズ他端のリード導体3b’をケース下方周壁のスリットから並行に導出している。10’はケース1’内に充填した耐熱性封止材である。
前記の突入電流制限回路等は、所定の回路基板に回路素子を搭載することにより組み立てられ、温度ヒューズ付き抵抗器もその回路素子の一つとして回路基板に実装される。
In FIG. 5, 1 'is a ceramic case with one side open. 2 'is a resistor, 3' is a thermal fuse, and after connecting the lead conductor 2a 'at one end of the resistor and the lead conductor 3a' at one end of the thermal fuse, these are accommodated in the case 1 ', and the resistor, etc. The lead conductor 2b ′ at the end and the lead conductor 3b ′ at the other end of the thermal fuse are led out in parallel from the slit in the lower peripheral wall of the case. Reference numeral 10 'denotes a heat-resistant sealing material filled in the case 1'.
The inrush current limiting circuit or the like is assembled by mounting a circuit element on a predetermined circuit board, and a resistor with a thermal fuse is mounted on the circuit board as one of the circuit elements.

前記の温度ヒューズ付き抵抗器を回路基板に実装する際のはんだ付け時、はんだ熱が温度ヒューズのリード導体を熱伝達経路として温度ヒューズのヒューズエレメント、すなわち低融点可溶合金片に伝達される。
前記温度ヒューズの低融点可溶合金片には、通常、融点ほぼ130℃の低融点合金が使用されており、前記のはんだ付け時、前記の熱伝達経路を経ての熱により温度ヒューズの低融点可溶合金片が熱的に損傷されることのないように、図5の(イ)におけるケース内の温度ヒューズ一端側リード導体の長さL0が充分に長く設定されている。
従って、温度ヒューズ付き抵抗器のケースの高さが相当に高くされている。
At the time of soldering when mounting the resistor with a temperature fuse on the circuit board, the solder heat is transferred to the fuse element of the temperature fuse, that is, the low melting point soluble alloy piece, using the lead conductor of the temperature fuse as a heat transfer path.
The low-melting-point fusible alloy piece of the thermal fuse is usually a low-melting-point alloy having a melting point of approximately 130 ° C., and the low melting point of the thermal fuse is caused by heat through the heat transfer path during the soldering. In order to prevent the fusible alloy piece from being thermally damaged, the length L0 of the lead conductor on the one end side of the thermal fuse in the case in FIG. 5A is set sufficiently long.
Therefore, the height of the case of the resistor with the thermal fuse is considerably increased.

前記の温度ヒューズ付き抵抗器実装回路板においては、占有スペースを少なくするために、通常縦配設とされる。
この場合、図6に示すように、温度ヒューズ付き抵抗器外被体Rのケースの高さをHとすると、温度ヒューズ付き抵抗器のはんだ付け箇所eに作用するモーメントはその高さHに比例する。
而るに、従来の温度ヒューズ付き抵抗器では、前記したように、ケースの高さHを相当に高くせざるを得ないために、はんだ付け箇所にそれだけ大きな応力が作用し、それだけはんだ付け箇所のクリープ破断が早期に発生し易い。この早期クリープ破断を防止するために、硬化性樹脂を主成分とする補強セメンではんだ付け箇所を補強することが行われているが、工数が増し、不利である。
The resistor-mounted circuit board with a thermal fuse is usually arranged vertically in order to reduce the occupied space.
In this case, as shown in FIG. 6, if the height of the case of the resistor outer shell R with the thermal fuse is H, the moment acting on the soldered portion e of the resistor with the thermal fuse is proportional to the height H. To do.
Therefore, in the conventional resistor with a thermal fuse, as described above, since the height H of the case has to be considerably increased, a large stress is applied to the soldering portion, and the soldering portion is accordingly increased. Creep rupture tends to occur early. In order to prevent this early creep rupture, the soldered portion is reinforced with a reinforcing cement containing a curable resin as a main component. However, this increases the number of steps and is disadvantageous.

本発明の目的は、温度ヒューズ付き抵抗器において、回路基板への実装はんだ付け時での温度ヒューズの熱的損傷の防止を保証のうえ、ケース高さの低減を図って温度ヒューズ付き抵抗器の実装はんだ付け箇所の耐クリープ安定性を向上させることにある。   The object of the present invention is to prevent thermal damage of the thermal fuse during mounting soldering to a circuit board in a resistor with a thermal fuse, and to reduce the case height to reduce the height of the case. The purpose is to improve the creep resistance stability of the soldered portion of the mounting.

請求項1に係る温度ヒューズ付き抵抗器は、両端にキャップ状電極を有する第1抵抗器及び第2抵抗器と、本体部の両側にリード導体を有しその本体長さが抵抗器の長さよりも短尺の温度ヒューズとが絶縁外被体内に互いに並行にかつ抵抗器の長手方向と外被体の長手方向とが一致する向きで配設され、温度ヒューズの一方のリード導体が第1抵抗器の一方のキャップ状電極端面に接合され、温度ヒューズの他方のリード導体が第2抵抗器の一方のキャップ状電極端面に接合され、第1抵抗器の他方のキャップ状電極端面に脚導体Aが、第2抵抗器の他方のキャップ状電極端面に脚導体Bがそれぞれ接合され、これらの脚導体が外被体の下面から突出されていることを特徴とする。
請求項2に係る温度ヒューズ付き抵抗器は、請求項1の温度ヒューズ付き抵抗器において、温度ヒューズのリード導体と抵抗器のキャップ状電極端面との接合及び抵抗器のキャップ状電極端面と脚導体との接合が、側面接触での溶接により行われていることを特徴とする。
請求項3に係る温度ヒューズ付き抵抗器は、請求項1または2の温度ヒューズ付き抵抗器において、第1抵抗器が第2抵抗器の上方に配設され、温度ヒューズの本体部が両抵抗器の間に挾まれ、第1抵抗器に接合された脚導体Aが下方配設の第2抵抗器の片側のキャップ状電極端面上を所定の間隔を隔て、しかも同キャップ状電極端面に接合された脚導体Bまたは同キャップ状電極端面に接合された温度ヒューズリード導体に対し横方向にずらされて延在していることを特徴とする。
請求項4に係る温度ヒューズ付き抵抗器は、請求項3の温度ヒューズ付き抵抗器において、所定の間隔箇所の絶縁強度が温度ヒューズ作動後のヒューズエレメント分断間の絶縁強度と同等若しくはやや高くされていることを特徴とする。
請求項5に係る温度ヒューズ付き抵抗器は、請求項1または2の温度ヒューズ付き抵抗器において、第1抵抗器が第2抵抗器の横に配設され、温度ヒューズの本体部が両抵抗器間に挾まれていることを特徴とする。
請求項6に係る温度ヒューズ付き抵抗器は、請求項1〜5何れかの温度ヒューズ付き抵抗器において、脚導体に実装基板の穴に嵌合される突起又は、はんだに係止される屈曲部若しくは凹凸部が設けられていることを特徴とする。
請求項7に係る温度ヒューズ付き抵抗器は、請求項1〜6何れかの温度ヒューズ付き抵抗器において、脚導体A、bの突出位置が外被体下面の対角線上に在ることを特徴とする。
The resistor with a thermal fuse according to claim 1 has a first resistor and a second resistor having cap-like electrodes at both ends, and lead conductors on both sides of the main body, and the main body length is longer than the length of the resistor. Short thermal fuses are arranged in the insulating casing in parallel with each other in a direction in which the longitudinal direction of the resistor and the longitudinal direction of the outer casing coincide with each other, and one lead conductor of the thermal fuse is the first resistor The other lead conductor of the thermal fuse is joined to one cap-like electrode end face of the second resistor, and the leg conductor A is joined to the other cap-like electrode end face of the first resistor. The leg conductors B are joined to the other cap-shaped electrode end faces of the second resistor, respectively, and these leg conductors protrude from the lower surface of the jacket.
A resistor with a thermal fuse according to claim 2 is the resistor with a thermal fuse according to claim 1, wherein the lead conductor of the thermal fuse and the cap-shaped electrode end surface of the resistor are joined together and the cap-shaped electrode end surface of the resistor and the leg conductor. It is characterized by being joined by welding with side contact.
A resistor with a thermal fuse according to claim 3 is the resistor with a thermal fuse according to claim 1 or 2, wherein the first resistor is disposed above the second resistor, and the main body of the thermal fuse is a double resistor. The leg conductor A joined to the first resistor is joined to the cap-like electrode end face at a predetermined interval on the cap-like electrode end face on one side of the second resistor disposed below. It is characterized by extending laterally with respect to the thermal fuse lead conductor joined to the leg conductor B or the end face of the cap-like electrode.
The resistor with a thermal fuse according to claim 4 is the resistor with a thermal fuse according to claim 3, wherein the insulation strength at predetermined intervals is equal to or slightly higher than the insulation strength between the fuse elements after the thermal fuse is activated. It is characterized by being.
A resistor with a thermal fuse according to claim 5 is the resistor with a thermal fuse according to claim 1 or 2, wherein the first resistor is disposed beside the second resistor, and the main body of the thermal fuse is a double resistor. It is characterized by being sandwiched between them.
A resistor with a thermal fuse according to a sixth aspect is the resistor with a thermal fuse according to any one of the first to fifth aspects, wherein the leg conductor is a protrusion fitted into a hole of the mounting board or a bent portion locked to solder. Alternatively, an uneven portion is provided.
The resistor with a thermal fuse according to claim 7 is the resistor with a thermal fuse according to any one of claims 1 to 6, characterized in that the protruding positions of the leg conductors A and b are on a diagonal line on the lower surface of the outer casing. To do.

請求項8に係る温度ヒューズ付き抵抗器は、両端にキャップ状電極を有する第1抵抗器及び第2抵抗器と、本体部の両側にリード導体を有しその本体長さが抵抗器の長さよりも短尺の温度ヒューズとが絶縁外被体内に互いに並行にかつ抵抗器の長手方向と外被体の長手方向とが一致する向きで配設され、温度ヒューズの一方のリード導体が第1抵抗器の一方のキャップ状電極端面に側面接触で接合され、第1抵抗器の他方のキャップ状電極端面と第2抵抗器の一方のキャップ状電極端面との間に連結導体が側面接触で接合され、第2抵抗器の他方のキャップ状電極端面に脚導体が側面接触で接合され、温度ヒューズの他方のリード導体に脚導体Aに並行な脚部B’が形成され、脚導体A及び脚部B’が外被体の下面から突出されていることを特徴とする。
請求項9に係る温度ヒューズ付き抵抗器は、請求項8の温度ヒューズ付き抵抗器において、脚部B’が形成されたリード導体及び脚導体Aが錫メッキ銅被覆鉄線または鋼線であることを特徴とする。
請求項10に係る温度ヒューズ付き抵抗器は、請求項8または9の温度ヒューズ付き抵抗器において、脚部B’が形成された他方のリード導体の長さが一方のリード導体の長さよりも長くなるように温度ヒューズの本体部の位置が設定されていることを特徴とする。
請求項11に係る温度ヒューズ付き抵抗器は、請求項8〜10何れかの温度ヒューズ付き抵抗器において、脚部B’が形成されたリード導体と脚導体とが同材質で、かつ同径とされていることを特徴とする。
請求項12に係る温度ヒューズ付き抵抗器は、請求項8〜11何れかの温度ヒューズ付き抵抗器において、脚部B’が形成されたリード導体の当該脚部及び脚導体に実装基板の穴に嵌合される突起又は、はんだに係止される屈曲部若しくは凹凸部が設けられていることを特徴とする。
The resistor with a thermal fuse according to claim 8 has a first resistor and a second resistor having cap-shaped electrodes at both ends, and lead conductors on both sides of the main body, and the main body length is longer than the length of the resistor. Short thermal fuses are arranged in the insulating casing in parallel with each other in a direction in which the longitudinal direction of the resistor and the longitudinal direction of the outer casing coincide with each other, and one lead conductor of the thermal fuse is the first resistor A connecting conductor is joined to the end face of the first resistor by side contact, and the connecting conductor is joined to the end face of the other cap-like electrode of the first resistor and the end face of one cap-like electrode of the second resistor by side contact; A leg conductor is joined to the other cap-shaped electrode end face of the second resistor by side contact, and a leg B ′ parallel to the leg conductor A is formed on the other lead conductor of the thermal fuse, and the leg conductor A and leg B are formed. 'Is projected from the lower surface of the outer casing. To.
The resistor with a thermal fuse according to claim 9 is the resistor with a thermal fuse according to claim 8, wherein the lead conductor and the leg conductor A on which the leg portion B 'is formed are a tinned copper-coated iron wire or a steel wire. Features.
The resistor with a thermal fuse according to claim 10 is the resistor with a thermal fuse according to claim 8 or 9, wherein the length of the other lead conductor on which the leg B 'is formed is longer than the length of the one lead conductor. The position of the main body part of the thermal fuse is set so as to be.
The resistor with a temperature fuse according to claim 11 is the resistor with a temperature fuse according to any one of claims 8 to 10, wherein the lead conductor formed with the leg portion B 'and the leg conductor are made of the same material and have the same diameter. It is characterized by being.
A resistor with a thermal fuse according to a twelfth aspect of the present invention is the resistor with a thermal fuse according to any one of the eighth to eleventh aspects, wherein the leg portion and the leg conductor of the lead conductor in which the leg portion B ′ is formed are formed in the hole of the mounting board. It is characterized in that a projection to be fitted or a bent portion or an uneven portion to be locked by solder is provided.

請求項13に係る温度ヒューズ付き抵抗器は、請求項1〜12何れかの温度ヒューズ付き抵抗器において、温度ヒューズのリード導体と抵抗器側面との間、または、脚導体とキャップ状電極端面との間、またはリード導体とキャップ状電極端面との間の少なくとも何れかに耐熱性絶縁材が介在され、またはそのリード導体部分または脚導体部分に耐熱性絶縁チューブが挿通されていることを特徴とする。
請求項14に係る温度ヒューズ付き抵抗器は、請求項1〜13何れかの温度ヒューズ付き抵抗器において、絶縁外被体が、一側面開口の絶縁ケース内に絶縁封止材が充填されたケースタイプとされていることを特徴とする。
A resistor with a thermal fuse according to a thirteenth aspect is the resistor with a thermal fuse according to any one of the first to twelfth aspects, between a lead conductor of the thermal fuse and a side surface of the resistor, or a leg conductor and a cap-shaped electrode end surface. A heat-resistant insulating material is interposed between the lead conductor and the end surface of the cap-shaped electrode, or a heat-resistant insulating tube is inserted into the lead conductor portion or the leg conductor portion. To do.
A resistor with a thermal fuse according to a fourteenth aspect of the present invention is the resistor with a thermal fuse according to any one of the first to thirteenth aspects, wherein the insulating jacket is filled with an insulating sealing material in an insulating case having one side opening. It is characterized by being typed.

(1)請求項1の温度ヒューズ付き抵抗器においては、外被体の長手方向と抵抗器の長手方向とが一致しているから、従って外被体の高さ方向に対し抵抗器が横方向に向いているから、外被体の高さを抵抗器の長さに関係なく低くできる。また、第1抵抗器と第2抵抗器との間に温度ヒューズが直列に接続され、これら抵抗器の脚導体が実装時はんだ付けされるから、はんだ付け箇所と温度ヒューズとの間の熱伝導路に抵抗器が介在されて実装時はんだ付け熱によるヒューズエレメントの熱的損傷が抵抗器の高い熱伝導抵抗のためによく抑制される。また、抵抗器が互いに並行な2個の抵抗器で構成され、それらの抵抗器に温度ヒューズ本体が並行に配設されているから、熱源となる抵抗器と温度ヒューズ本体間の距離を全体的に短くでき(2個の抵抗器が一本化されている場合に較べ)、温度ヒューズの作動をそれだけ迅速化できる。
(2)請求項2の温度ヒューズ付き抵抗器においては、特に、抵抗器のキャップ状電極とリード導体や脚導体との接合が、キャップ状電極端面への側面接触接合により行われているので、垂直な植設接合の場合とは異なり、キャップ状電極端面でのリード導体や脚導体の納まり具合を良くでき、当該キャップ状電極端面に対する外被体絶縁材の被り厚みを薄くでき、外被体の長さをそれだけ短縮できる。
(3)請求項3の温度ヒューズ付き抵抗器においては、特に、第1抵抗器と第2抵抗器とが上下に並行に配設され、温度ヒューズの本体部が両抵抗器の間に挾まれているので、外被体の巾を狭くでき、実装スペースファクターを向上できる。しかも、温度ヒューズ本体が上下の抵抗器で加熱され、その加熱効率が高くなるので、温度ヒューズの迅速作動性をより一層に向上できる。また、脚導体Aと脚導体Bまたは脚導体Aと温度ヒューズリード導体との間の電気絶縁を、脚導体Aの横方向ずれのない場合に較べて確実に行い得る。
(4)請求項4の温度ヒューズ付き抵抗器においては、特に、上方の第1抵抗器に接合された脚導体Aが、下方配設の第2抵抗器の片側のキャップ状電極端面の直前を所定の間隔で延在する、その脚導体Aとキャップ状電極端面との間に作用する電位差が、常時は実質上0であるのに対し、温度ヒューズ作動後では、温度ヒューズエレメントの分断間ギャップに作用する電位差に実質上等しくなる。従って、その所定の間隔箇所での絶縁強度を温度ヒューズ作動後のヒューズエレメント分断間の絶縁強度と同等若しくはやや高い程度に抑えることにより、その箇所の必要以上の絶縁間隔を排除して外被体をコンパクトにできる。
(5)請求項5の温度ヒューズ付き抵抗器においては、特に、第1抵抗器と第2抵抗器の配設高さを同じにでき、その抵抗器の間に温度ヒューズ本体を配設できるので、すなわち横配列にできるので、縦配列の場合よりも外被体の高さを低くできる。
(6)請求項6の温度ヒューズ付き抵抗器においては、特に、実装時はんだ付けの際、外被体が浮くのを防止できる。又は、実装後、はんだ付け部分の固定強度を上げることができる。
(7)請求項7の温度ヒューズ付き抵抗器においては、特に、脚導体A、Bの実装時はんだ付け箇所の間隔を広くでき、はんだブリッジの危険性を排除できる。
(8)請求項8の温度ヒューズ付き抵抗器においては、外被体の長手方向と抵抗器の長手方向とが一致しているから、従って外被体の高さ方向に対し抵抗器が横方向に向いているから、外被体の高さを抵抗器の長さに関係なく低くできる。また、抵抗器が互いに並行な2個の抵抗器で構成され、それらの抵抗器に温度ヒューズ本体が並行に配設されているから、熱源となる抵抗器と温度ヒューズ本体間の距離を全体的に短くでき(2個の抵抗器が一本化されている場合に較べ)、温度ヒューズの作動をそれだけ迅速化できる。更に、抵抗器のキャップ状電極とリード導体や脚導体との接合が、キャップ状電極端面への側面接触接合により行われているので、垂直な植設接合の場合とは異なり、キャップ状電極端面でのリード導体や脚導体の納まり具合を良くでき、当該キャップ状電極端面に対する外被体絶縁材の被り厚みを薄くでき、外被体の長さをそれだけ短縮できる。
(9)請求項9の温度ヒューズ付き抵抗器では、特に請求項8において、脚部B’が実装時はんだ付けされる温度ヒューズリード導体が錫メッキ銅被覆鉄線または鋼線とされているから、その実装時はんだ付け箇所から温度ヒューズエレメントヘの熱伝導路の熱導電抵抗が鉄線または鋼線のために高く、また、実装時はんだ付けされる脚導体A→第1または第2抵抗器→連結導体→第2または第1抵抗器→温度ヒューズリード導体→ヒューズエレメントの熱伝導路の熱伝導抵抗が抵抗器の抵抗線のために高く、実装時はんだ付けでのヒューズエレメントの熱的損傷を一層効果的に防止できる。また、錫メッキのために実装時はんだ付けの信頼性を向上できる。
(10)請求項10の温度ヒューズ付き抵抗器では、特に請求項8〜9において、脚部B’を有する片側の温度ヒューズリード導体は他側のリード導体よりも長くされているから、そのリード導体の実装時はんだ付け箇所から温度ヒューズエレメントヘの熱伝導路の熱伝導抵抗が充分に高く、他側のリード導体においては抵抗器を経てその脚部が実装時はんだ付けされるから、その実装時はんだ付け箇所から温度ヒューズエレメントに至る熱伝導路の熱伝導抵抗が高く、実装時はんだ付けでのヒューズエレメントの熱的損傷をより一層効果的に防止できる。
(11)請求項11の温度ヒューズ付き抵抗器では、特に、温度ヒューズ付き抵抗器の運搬中でのリード導体の脚部やリード導体の曲げに対する剛性を同等に付与でき、その曲げを排除して実装時はんだ付けを円滑に行うことができる。また構成材料の共通化により部品種類を少なくできる。
(12)請求項12においては、特に、実装時はんだ付けの際、外被体が浮くのを防止できる。又は、実装後、はんだ付け部分の固定強度を上げることができる。
(13)請求項13においては、特に、外被体成形時の加圧による接触短絡の防止のために隔離間隔を広くする必要がなく、その隔離間隔を小さくして外被体の外郭を小さくできる。
(14)請求項14においては、特に、封止絶縁を無加圧注型により行うことができ、加圧に対する接触短絡の防止のために隔離間隔を広くする必要がなく、その隔離間隔を小さくして外被体の外郭を小さくできる。
(1) In the resistor with a thermal fuse of claim 1, since the longitudinal direction of the outer casing and the longitudinal direction of the resistor coincide with each other, therefore, the resistor is transverse to the height direction of the outer casing. Therefore, the height of the outer casing can be reduced regardless of the length of the resistor. In addition, since thermal fuses are connected in series between the first resistor and the second resistor, and the leg conductors of these resistors are soldered when mounted, the heat conduction between the soldered portion and the thermal fuse A resistor is interposed in the path, and thermal damage of the fuse element due to soldering heat during mounting is well suppressed due to the high heat conduction resistance of the resistor. In addition, since the resistor is composed of two resistors parallel to each other, and the thermal fuse main body is arranged in parallel to the resistors, the distance between the resistor serving as a heat source and the thermal fuse main body is set as a whole. Can be shortened (compared to a case where two resistors are integrated), and the operation of the thermal fuse can be speeded up accordingly.
(2) In the resistor with a thermal fuse of claim 2, in particular, the bonding between the cap-shaped electrode of the resistor and the lead conductor or the leg conductor is performed by side contact bonding to the end surface of the cap-shaped electrode. Unlike the case of vertical implantation joining, it is possible to improve the fit of the lead conductors and leg conductors at the end face of the cap-like electrode, and to reduce the covering thickness of the outer insulating material to the end face of the cap-like electrode. Can be shortened accordingly.
(3) In the resistor with a thermal fuse of claim 3, in particular, the first resistor and the second resistor are arranged in parallel vertically, and the main body of the thermal fuse is sandwiched between both resistors. As a result, the width of the outer casing can be reduced and the mounting space factor can be improved. In addition, since the thermal fuse body is heated by the upper and lower resistors and the heating efficiency is increased, the rapid operability of the thermal fuse can be further improved. Further, the electrical insulation between the leg conductor A and the leg conductor B or between the leg conductor A and the thermal fuse lead conductor can be reliably performed as compared with the case where there is no lateral displacement of the leg conductor A.
(4) In the resistor with a thermal fuse of claim 4, in particular, the leg conductor A joined to the upper first resistor is located immediately before the end face of the cap-like electrode on one side of the second resistor disposed below. The potential difference acting between the leg conductor A and the end face of the cap-like electrode extending at a predetermined interval is normally substantially zero, whereas after the thermal fuse is activated, the gap between the thermal fuse elements is divided. Is substantially equal to the potential difference acting on. Therefore, by suppressing the insulation strength at the predetermined intervals to the same level as or slightly higher than the insulation strength between the fuse elements after the thermal fuse is activated, it is possible to eliminate the insulation interval more than necessary at the locations, Can be made compact.
(5) In the resistor with a thermal fuse according to the fifth aspect, in particular, the arrangement height of the first resistor and the second resistor can be made the same, and the thermal fuse body can be arranged between the resistors. That is, since it can be arranged in a horizontal arrangement, the height of the outer casing can be made lower than in the case of a vertical arrangement.
(6) In the resistor with a thermal fuse of claim 6, it is possible to prevent the outer cover from floating especially during soldering during mounting. Or, after mounting, the fixing strength of the soldered portion can be increased.
(7) In the resistor with a thermal fuse according to the seventh aspect, in particular, it is possible to widen the interval between the soldering portions when mounting the leg conductors A and B, thereby eliminating the danger of the solder bridge.
(8) In the resistor with a thermal fuse of claim 8, since the longitudinal direction of the outer casing and the longitudinal direction of the resistor coincide with each other, therefore, the resistor is transverse to the height direction of the outer casing. Therefore, the height of the outer casing can be reduced regardless of the length of the resistor. In addition, since the resistor is composed of two resistors parallel to each other, and the thermal fuse main body is arranged in parallel to the resistors, the distance between the resistor serving as a heat source and the thermal fuse main body is set as a whole. Can be shortened (compared to a case where two resistors are integrated), and the operation of the thermal fuse can be speeded up accordingly. Further, since the cap-shaped electrode of the resistor and the lead conductor or leg conductor are joined by side contact joining to the end face of the cap-like electrode, unlike the case of vertical implantation joining, the end face of the cap-like electrode The lead conductors and leg conductors can be better accommodated, the covering thickness of the covering insulator on the end face of the cap-like electrode can be reduced, and the length of the covering can be reduced accordingly.
(9) In the resistor with a thermal fuse according to claim 9, since the thermal fuse lead conductor to which the leg portion B ′ is soldered at the time of mounting is a tin-plated copper-coated iron wire or a steel wire, The heat conduction resistance of the heat conduction path from the soldering point to the thermal fuse element at the time of mounting is high due to the iron wire or the steel wire, and the leg conductor A to be soldered at the time of mounting → first or second resistor → connection Conductor → 2nd or 1st resistor → Thermal fuse lead conductor → The heat conduction resistance of the heat conduction path of the fuse element is high due to the resistance wire of the resistor, which further increases the thermal damage of the fuse element during soldering during mounting It can be effectively prevented. Moreover, the reliability of soldering at the time of mounting can be improved because of tin plating.
(10) In the resistor with a thermal fuse of claim 10, in particular, in claims 8 to 9, the thermal fuse lead conductor on one side having the leg B ′ is made longer than the lead conductor on the other side. Since the heat conduction resistance of the heat conduction path from the soldering point to the thermal fuse element when the conductor is mounted is sufficiently high, and the other lead conductor is soldered via a resistor during mounting, the mounting The thermal conduction resistance of the thermal conduction path from the soldering location to the thermal fuse element is high, and thermal damage to the fuse element during soldering during mounting can be more effectively prevented.
(11) In the resistor with a thermal fuse of claim 11, in particular, the rigidity of the lead conductor leg portion and the lead conductor during bending of the resistor with the thermal fuse can be equally provided, and the bending is eliminated. Soldering can be performed smoothly during mounting. In addition, the number of component types can be reduced by sharing the constituent materials.
(12) In the twelfth aspect, it is possible to prevent the outer cover from floating particularly during soldering during mounting. Or, after mounting, the fixing strength of the soldered portion can be increased.
(13) In the thirteenth aspect, it is not particularly necessary to widen the separation interval in order to prevent contact short circuit due to pressurization at the time of molding the outer shell, and the outer space of the outer shell is reduced by reducing the separation interval. it can.
(14) In claim 14, in particular, sealing insulation can be performed by pressureless casting, and it is not necessary to widen the separation interval to prevent contact short circuit against pressurization, and the separation interval is reduced. The outer shell can be made smaller.

図1の(イ)は本発明に係る温度ヒューズ付き抵抗器の一実施例を示す上面図、図1の(ロ)は同じく側面図、図1の(ハ)は同じく正面図であり、説明の便宜上、外被体を透視性として図示してある。
図1において、1は外被体、例えば耐熱性ケース、例えばセラミックス製の一側面開放のケース内に耐熱性充填材を充填するものを使用でき、透明であると仮定して点線で示してある。
21及び22は外被体内に所定の間隔を隔てて上下に並行に配置された第1抵抗器及び第2抵抗器であり、セラミックス等の耐熱コアの両端にキャツプ状電極21a,21b、22a,22bを装着し、コアにニッケル−クロム合金線、銅−ニッケル合金線、銅−マンガン−ニッケル合金線等の抵抗線を巻き付け、その巻き付け抵抗線の両端をコア両端の各キャツプ状電極21a,21b、22a,22bの周面に溶接等により結着してある。
1A is a top view showing an embodiment of a resistor with a thermal fuse according to the present invention, FIG. 1B is a side view, and FIG. 1C is a front view. For convenience, the outer casing is illustrated as being transparent.
In FIG. 1, reference numeral 1 denotes an outer casing, for example, a heat resistant case, for example, a case in which a heat resistant filler is filled in a case open on one side made of ceramics, and is indicated by a dotted line assuming that it is transparent. .
Reference numerals 21 and 22 denote a first resistor and a second resistor, which are arranged in parallel in a vertical direction at a predetermined interval in the outer casing, and cap-shaped electrodes 21a, 21b, 22a, A resistance wire such as a nickel-chromium alloy wire, a copper-nickel alloy wire, a copper-manganese-nickel alloy wire is wound around the core, and both ends of the wound resistance wire are connected to the cap-shaped electrodes 21a, 21b at both ends of the core. , 22a and 22b are bonded by welding or the like.

3は温度ヒューズであり、抵抗器21,22より短尺の本体部30の両側にリード導体3a,3bを有しており、例えば、アキシャル型を用いることができる。例えば、一直線状に対向する一対のリード線の先端部間にヒューズエレメントを接続し、このヒューズエレメントにフラックスを塗布し、このフラックス塗布ヒューズエレメント上に筒状絶縁体、例えばセラミックス筒を挿通し、筒状絶縁体各端とリード導体との間を耐熱性封止材、例えば耐熱樹脂、セメント等の接着剤で封止したものを使用できる。
この温度ヒューズ3の本体部30が前記上下の第1抵抗器21と第2抵抗器22との間に抵抗器21,22と並行になる向きで配設されており、図示の例では、温度ヒューズ本体30の軸心と抵抗器21,22の軸心とが横方向にずらされている。
温度ヒューズ本体30のリード導体3aが第1抵抗器21のキャップ状電極3aの端面に直角に折り曲げのうえ側面接触で溶接され、、温度ヒューズ本体30のリード導体3bが第1抵抗器21のキャップ状電極2aとは反対側の第2抵抗器キャップ状電極2bの端面(第2抵抗器22のキャップ状電極2bの端面)に直角に折り曲げのうえ側面接触で溶接されて第1抵抗器21と第2抵抗器22との間に温度ヒューズ3が直列に接続されている。第1抵抗器21のキャップ状電極21bの端面には脚導体Aが側面接触で溶接され、第2抵抗器22のキャップ状電極22aの端面には脚導体Bが側面接触で溶接され、これらの脚導体A、Bが外被体の下面から突出されている。
第1抵抗器21のキャップ状電極21bの端面に溶接された脚導体Aと第2抵抗器22のキャップ状電極22bの端面に溶接された温度ヒューズリード導体折り曲げ部3b’とは充分な横方向間隔でずらされている。
Reference numeral 3 denotes a thermal fuse, which has lead conductors 3a and 3b on both sides of the main body 30 shorter than the resistors 21 and 22. For example, an axial type can be used. For example, a fuse element is connected between the ends of a pair of lead wires that are linearly opposed, a flux is applied to the fuse element, and a cylindrical insulator, for example, a ceramic cylinder is inserted over the flux applied fuse element, What sealed the space | interval between each end of a cylindrical insulator and a lead conductor with heat resistant sealing materials, for example, adhesives, such as a heat resistant resin and cement, can be used.
The main body 30 of the thermal fuse 3 is disposed between the upper and lower first resistors 21 and the second resistor 22 in a direction parallel to the resistors 21 and 22. The axis of the fuse body 30 and the axes of the resistors 21 and 22 are shifted laterally.
The lead conductor 3a of the thermal fuse body 30 is bent at a right angle to the end face of the cap-like electrode 3a of the first resistor 21 and welded by side contact, and the lead conductor 3b of the thermal fuse body 30 is the cap of the first resistor 21. The first resistor 21 is welded to the end face of the second resistor cap-like electrode 2b opposite to the electrode 2a (the end face of the cap-like electrode 2b of the second resistor 22) at a right angle and welded to the side contact. A thermal fuse 3 is connected in series with the second resistor 22. The leg conductor A is welded to the end face of the cap-shaped electrode 21b of the first resistor 21 by side contact, and the leg conductor B is welded to the end face of the cap-shaped electrode 22a of the second resistor 22 by side contact. Leg conductors A and B protrude from the lower surface of the jacket.
The leg conductor A welded to the end face of the cap-like electrode 21b of the first resistor 21 and the temperature fuse lead conductor bent portion 3b ′ welded to the end face of the cap-like electrode 22b of the second resistor 22 are sufficiently lateral. It is shifted at intervals.

この横方向間隔を設定するために、抵抗器21,22の軸心と温度ヒューズ本体30との軸心を横方向にずらすと共に脚導体Aと第1抵抗器21のキャップ状電極21bの溶接位置をキャップ状電極端面外周の左側サイド(矢印+方向)に近付けるように横方向にずらせ、温度ヒューズリード導体3bの折り曲げ部3b’と第2抵抗器22のキャップ状電極22bの端面との溶接位置をキャップ状電極端面外周の右側サイド(矢印−方向)に近付けるように横方向にずらせてある。
第2抵抗器22のキャップ状電極22aの端面に溶接する脚導体Bのその溶接位置は、脚導体Aと間隔を可及的に大として実装時はんだ付けでのブリッジ防止上、それらの脚導体A,Bを外被体下面の四角形の対角線上に位置させるように、キャップ状電極端面外周の右側サイド(矢印−方向)に近付けるように横方向にずらせることが好ましい。
温度ヒューズリード導体3aの折り曲げ部と第1抵抗器21のキャップ状電極21aの端面との溶接位置は、適宜に設定できる。
In order to set the distance in the lateral direction, the axial centers of the resistors 21 and 22 and the thermal fuse body 30 are shifted laterally, and the welding position of the leg conductor A and the cap-shaped electrode 21b of the first resistor 21 is shifted. Is shifted laterally so as to approach the left side (arrow + direction) of the outer periphery of the cap-shaped electrode end surface, and the welding position between the bent portion 3b ′ of the thermal fuse lead conductor 3b and the end surface of the cap-shaped electrode 22b of the second resistor 22 Is shifted laterally so as to approach the right side (arrow-direction) of the outer periphery of the end face of the cap-shaped electrode.
The welding position of the leg conductor B to be welded to the end face of the cap-like electrode 22a of the second resistor 22 is set as large as possible between the leg conductor A and the bridge to prevent bridging during soldering during mounting. Preferably, A and B are shifted laterally so as to be close to the right side (arrow-direction) of the outer periphery of the end face of the cap-shaped electrode so that A and B are positioned on the diagonal line of the quadrangle on the lower surface of the outer casing.
The welding position between the bent portion of the thermal fuse lead conductor 3a and the end face of the cap-shaped electrode 21a of the first resistor 21 can be set as appropriate.

図2の(イ)は本発明に係る温度ヒューズ付き抵抗器の前記とは別の実施例を示す上面図、図2の(ロ)は同じく側面図、図1の(ハ)は同じく正面図であり、説明の便宜上、外被体を透視性として図示してある。
図2において、1は外被体、例えば耐熱性ケース、例えばセラミックス製の一側面開放のケース内に耐熱性充填材を充填するものを使用でき、透明であると仮定して点線で示してある。
21及び22は外被体内に所定の間隔を隔てて上下に並行に配置された第1抵抗器及び第2抵抗器であり、セラミックス等の耐熱コアの両端にキャツプ状電極21a,21b、22a,22bを装着し、コアにニッケル−クロム合金線、銅−ニッケル合金線、銅−マンガン−ニッケル合金線等の抵抗線を巻き付け、その巻き付け抵抗線の両端をコア両端の各キャツプ状電極21a,21b、22a,22bの周面に溶接等により結着してある。
2A is a top view showing another embodiment of the resistor with a thermal fuse according to the present invention, FIG. 2B is a side view, and FIG. 1C is a front view. For convenience of explanation, the outer casing is illustrated as being transparent.
In FIG. 2, reference numeral 1 denotes an outer casing, for example, a heat resistant case, for example, a case in which a heat resistant filler is filled in a case opened on one side made of ceramics, and is indicated by a dotted line on the assumption that it is transparent. .
Reference numerals 21 and 22 denote a first resistor and a second resistor, which are arranged in parallel in a vertical direction at a predetermined interval in the outer casing, and cap-shaped electrodes 21a, 21b, 22a, A resistance wire such as a nickel-chromium alloy wire, a copper-nickel alloy wire, or a copper-manganese-nickel alloy wire is wound around the core, and both ends of the wound resistance wire are connected to the cap-shaped electrodes 21a and 21b at both ends of the core. , 22a and 22b are bonded by welding or the like.

3は温度ヒューズであり、抵抗器21,22より短尺の本体部30の両側にリード導体3a,3bを有しており、例えば、アキシャル型を用いることができる。
この温度ヒューズ3の本体部30が前記上下の第1抵抗器21と第2抵抗器22との間に抵抗器と並行になる向きで配設されており、図示の例では、温度ヒューズ本体30の軸心と抵抗器21,22の軸心とが横方向にずらされている。
温度ヒューズ本体30のリード導体3aが第1抵抗器21のキャップ状電極21aの端面に直角に折り曲げのうえ側面接触で溶接され、、温度ヒューズ本体30の他方のリード導体3bが折り返され、更に第2抵抗器22のキャップ状電極22aの端面に直角に折り曲げのうえ側面接触で溶接されている。而して、第1抵抗器21と第2抵抗器22との間に温度ヒューズ3が直列に接続されている。第1抵抗器21のキャップ状電極21bの端面には脚導体Aが側面接触で溶接され、第2抵抗器22のキャップ状電極22bの端面には脚導体Bが側面接触で溶接され、これらの脚導体A、Bが外被体1の下面から突出されている。
第1抵抗器21のキャップ状電極21bの端面に溶接された脚導体Aと第2抵抗器22のキャップ状電極22bの端面に溶接された脚導体Bとは充分な横方向間隔でずらされている。
Reference numeral 3 denotes a thermal fuse, which has lead conductors 3a and 3b on both sides of the main body 30 shorter than the resistors 21 and 22. For example, an axial type can be used.
The main body portion 30 of the thermal fuse 3 is disposed between the upper and lower first resistors 21 and the second resistor 22 in a direction parallel to the resistors. And the axes of the resistors 21 and 22 are shifted laterally.
The lead conductor 3a of the thermal fuse body 30 is bent at right angles to the end face of the cap-shaped electrode 21a of the first resistor 21 and welded by side contact, and the other lead conductor 3b of the thermal fuse body 30 is folded back. The two-resistor 22 is bent at a right angle to the end face of the cap-like electrode 22a and welded by side contact. Thus, the thermal fuse 3 is connected in series between the first resistor 21 and the second resistor 22. The leg conductor A is welded to the end face of the cap-shaped electrode 21b of the first resistor 21 by side contact, and the leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. Leg conductors A and B protrude from the lower surface of the jacket 1.
The leg conductor A welded to the end face of the cap-like electrode 21b of the first resistor 21 and the leg conductor B welded to the end face of the cap-like electrode 22b of the second resistor 22 are shifted by a sufficient lateral distance. Yes.

この横方向間隔を設定するために、第1抵抗器21のキャップ状電極21bの端面と脚導体Aとの溶接位置を同キャップ状電極端面の外周の左側サイド(図示の+方向)に近付けるように横方向にずらせ、第2抵抗器22のキャップ状電極22bの端面と脚導体Bとの溶接位置をキャップ状電極端面外周の左側サイド(図示の−方向)に近付けるように横方向にずらせてある。   In order to set the lateral distance, the welding position between the end face of the cap-shaped electrode 21b of the first resistor 21 and the leg conductor A is brought closer to the left side (the + direction in the figure) of the outer periphery of the end face of the cap-shaped electrode. The welding position of the end face of the cap-shaped electrode 22b of the second resistor 22 and the leg conductor B is shifted laterally so as to approach the left side (the negative direction in the figure) of the outer periphery of the cap-shaped electrode end face. is there.

図1〜図2に示した温度ヒューズ付き抵抗器においては、外被体1の長手方向と抵抗器21,22の長手方向とが一致しているから、従って外被体1の高さ方向に対し抵抗器21,22が横方向に向いているから、外被体1の高さを抵抗器21,22の長さに関係なく低くできる。従って、前述した実装はんだ付け箇所の破損をよく防止できる。
また、第1抵抗器21と第2抵抗器22との間に温度ヒューズ3が直列に接続され、これら抵抗器21,22の脚導体A,Bが実装時はんだ付けされるから、はんだ付け箇所と温度ヒューズ本体30との間の熱伝導路に抵抗器21,22が介在されて実装時はんだ付け熱によるヒューズエレメントの熱的損傷が抵抗器21,22の高い熱伝導抵抗のためによく抑制できる。
また、抵抗器が互いに並行な2個の抵抗器21.22で構成され、これらの抵抗器に温度ヒューズ本体30が並行に配設されているから、熱源となる抵抗器21,22と温度ヒューズ本体30間の距離を全体的に短くでき(2個の抵抗器が一本化されている場合に較べ)、温度ヒューズの作動速度をそれだけ迅速化できる。
更に、抵抗器のキャップ状電極とリード導体や脚導体との接合が、キャップ状電極端面への側面接触接合により行われているので、垂直な植設接合の場合とは異なり、キャップ状電極端面でのリード導体や脚導体の納まり具合を良くでき、当該キャップ状電極端面に対する外被体絶縁材の被り厚みを薄くでき、外被体1の長さをそれだけ短縮できる。
更に、第1抵抗器21が第2抵抗器22の上方に配設され、温度ヒューズ3の本体部30が両抵抗器21,22の間に挾まれているので、外被体1の巾を狭くでき、実装スペースファクターを向上できる。
更に、上方の第1抵抗器21に接合された脚導体Aが、下方配設の第2抵抗器22の片側のキャップ状電極22bの端面直前を所定の間隔で延在する、その脚導体Aとキャップ状電極22bの端面との間に作用する電位差が、常時は実質上0であるのに対し、温度ヒューズ作動後では、温度ヒューズエレメントの分断間ギャップに作用する電位差と実質上等しくなる。従って、その所定の間隔箇所での絶縁強度を温度ヒューズ作動後のヒューズエレメント分断間の絶縁強度と同等若しくはやや高い程度に抑えることにより、その箇所の必要以上の絶縁間隔を排除して外被体をコンパクトにできる。この間の絶縁を補強するために、脚導体Aに耐熱性絶縁チューブを挿通することもできる。耐熱性絶縁チューブの挿通に代え、セラミックスシート等の耐熱シートを介在させることもできる。
In the resistor with a thermal fuse shown in FIG. 1 to FIG. 2, the longitudinal direction of the envelope body 1 and the longitudinal direction of the resistors 21 and 22 coincide with each other. On the other hand, since the resistors 21 and 22 are oriented in the lateral direction, the height of the jacket 1 can be reduced regardless of the length of the resistors 21 and 22. Therefore, it is possible to well prevent the above-described mounting soldering portion from being damaged.
Also, since the thermal fuse 3 is connected in series between the first resistor 21 and the second resistor 22 and the leg conductors A and B of these resistors 21 and 22 are soldered at the time of mounting, Resistors 21 and 22 are interposed in the heat conduction path between the main body 30 and the thermal fuse body 30, and thermal damage to the fuse element due to soldering heat during mounting is well suppressed due to the high heat conduction resistance of the resistors 21 and 22. it can.
Further, the resistor is composed of two resistors 21.22 which are parallel to each other, and the thermal fuse body 30 is arranged in parallel to these resistors, so that the resistors 21 and 22 serving as heat sources and the thermal fuse The distance between the main bodies 30 can be shortened as a whole (compared to the case where two resistors are integrated), and the operating speed of the thermal fuse can be increased accordingly.
Further, since the cap-shaped electrode of the resistor and the lead conductor or leg conductor are joined by side contact joining to the end face of the cap-like electrode, unlike the case of vertical implantation joining, the end face of the cap-like electrode The lead conductors and leg conductors can be better accommodated, the covering thickness of the covering insulator on the end face of the cap-like electrode can be reduced, and the length of the covering 1 can be shortened accordingly.
Further, the first resistor 21 is disposed above the second resistor 22, and the main body 30 of the thermal fuse 3 is sandwiched between the resistors 21 and 22. It can be narrowed and the mounting space factor can be improved.
Further, the leg conductor A joined to the upper first resistor 21 extends at a predetermined interval immediately before the end face of the cap-like electrode 22b on one side of the second resistor 22 disposed below. And the end face of the cap-shaped electrode 22b are always substantially zero, but after the thermal fuse operation, the potential difference acting on the gap between the thermal fuse elements is substantially equal. Therefore, by suppressing the insulation strength at the predetermined intervals to the same level as or slightly higher than the insulation strength between the fuse elements after the thermal fuse is activated, it is possible to eliminate the insulation interval more than necessary at the locations, Can be made compact. In order to reinforce the insulation during this period, a heat-resistant insulating tube can be inserted into the leg conductor A. Instead of inserting the heat-resistant insulating tube, a heat-resistant sheet such as a ceramic sheet can be interposed.

図3の(イ)は本発明に係る温度ヒューズ付き抵抗器の上記とは別の実施例を示す上面図、図3の(ロ)は同じく側面図、図3の(ハ)は同じく正面図であり、説明の便宜上、外被体を透視性として図示してある。
図3において、1は外被体、例えば耐熱性ケース、例えばセラミックス製の一側面開放のケース内に耐熱性充填材を充填するものを使用でき、透明であると仮定して点線で示してある。
21及び22は外被体1内に所定の間隔を隔てて横に並行に配置された第1抵抗器及び第2抵抗器であり、セラミックス等の耐熱コアの両端にキャツプ状電極21a,21b、22a,22bを装着し、コアにニッケル−クロム合金線、銅−ニッケル合金線、銅−マンガン−ニッケル合金線等の抵抗線を巻き付け、その巻き付け抵抗線の両端をコア両端の各キャツプ状電極21a,21b、22a,22bの周面に溶接等により結着してある。
3A is a top view showing another embodiment of the resistor with a thermal fuse according to the present invention, FIG. 3B is a side view, and FIG. 3C is a front view. For convenience of explanation, the outer casing is illustrated as being transparent.
In FIG. 3, reference numeral 1 denotes an outer cover, for example, a heat-resistant case, for example, a ceramic-filled case in which a heat-resistant filler is filled, and is indicated by a dotted line assuming that it is transparent. .
Reference numerals 21 and 22 denote a first resistor and a second resistor, which are arranged in parallel in the outer casing 1 at a predetermined interval. Cap-shaped electrodes 21a, 21b, 22a and 22b are mounted, and resistance wires such as nickel-chromium alloy wire, copper-nickel alloy wire, copper-manganese-nickel alloy wire are wound around the core, and both ends of the wound resistance wire are connected to the respective cap-shaped electrodes 21a at both ends of the core. , 21b, 22a, 22b are bonded by welding or the like.

3は温度ヒューズであり、抵抗器21,22より短尺の本体部30の両側にリード導体3a,3bを有しており、例えば、アキシャル型を用いることができる。
この温度ヒューズ3の本体部30が前記左右の第1抵抗器21と第2抵抗器22との間に抵抗器21,22と並行になる向きで配設されている。
温度ヒューズ本体30の一方のリード導体3aが第2抵抗器のキャップ状電極22aの端面に直角に折り曲げのうえ側面接触で溶接され、、温度ヒューズ本体30のリード導体3bが第1抵抗器21のキャップ状電極21bの端面に直角に折り曲げのうえ側面接触で溶接されて第1抵抗器21と第2抵抗器22との間に温度ヒューズ3が直列に接続されている。第1抵抗器21のキャップ状電極21aの端面には脚導体Aが側面接触で溶接され、第2抵抗器22のキャップ状電極22bの端面には脚導体Bが側面接触で溶接され、これらの脚導体A、Bが外被体1の下面から突出されている。
第1抵抗器21のキャップ状電極21aの端面に溶接された脚導体Aと第2抵抗器22のキャップ状電極22bの端面に溶接された脚導体Bとは充分な横方向間隔でずらされている。
Reference numeral 3 denotes a thermal fuse, which has lead conductors 3a and 3b on both sides of the main body 30 shorter than the resistors 21 and 22. For example, an axial type can be used.
The main body 30 of the thermal fuse 3 is disposed between the left and right first resistors 21 and the second resistor 22 in a direction parallel to the resistors 21 and 22.
One lead conductor 3a of the thermal fuse body 30 is bent at a right angle to the end face of the cap-like electrode 22a of the second resistor and welded by side contact, and the lead conductor 3b of the thermal fuse body 30 is connected to the first resistor 21. The thermal fuse 3 is connected in series between the first resistor 21 and the second resistor 22 by being bent at right angles to the end surface of the cap-shaped electrode 21b and welded by side contact. The leg conductor A is welded to the end face of the cap-shaped electrode 21a of the first resistor 21 by side contact, and the leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. Leg conductors A and B protrude from the lower surface of the jacket 1.
The leg conductor A welded to the end face of the cap-shaped electrode 21a of the first resistor 21 and the leg conductor B welded to the end face of the cap-shaped electrode 22b of the second resistor 22 are shifted by a sufficient lateral distance. Yes.

この横方向間隔を設定するために、第1抵抗器21のキャップ状電極21aの端面と脚導体Aとの溶接位置を同キャップ状電極端面外周の左側サイド(図示の−方向)に近付けるように横方向にずらせ、第2抵抗器22のキャップ状電極22bの端面と脚導体Bとの溶接位置をキャップ状電極端面外周の右側サイド(図示の+方向)に近付けるように横方向にずらせてある。
而して、脚導体A、脚導体Bとは、横方向間隔を横長さとし抵抗器の長さを縦長さとする長方形の対角線で隔てられた位置にあり、その間隔が長いために脚導体の実装はんだ付け時でのはんだブリッジの防止に有利である。
In order to set the lateral spacing, the welding position between the end face of the cap-shaped electrode 21a of the first resistor 21 and the leg conductor A is brought closer to the left side (the negative direction in the figure) of the outer periphery of the cap-shaped electrode end face. The welding position of the end surface of the cap-shaped electrode 22b of the second resistor 22 and the leg conductor B is shifted laterally so as to approach the right side (the + direction in the figure) of the outer periphery of the cap-shaped electrode end surface. .
Therefore, the leg conductor A and the leg conductor B are located at positions separated by a rectangular diagonal line in which the horizontal interval is a horizontal length and the length of the resistor is a vertical length. This is advantageous for preventing solder bridges during soldering.

図4の(イ)は本発明に係る温度ヒューズ付き抵抗器の上記とは別の実施例を示す上面図、図4の(ロ)は同じく側面図、図4の(ハ)は同じく正面図であり、説明の便宜上、外被体を透視性として図示してある。
図4において、1は外被体、例えば耐熱性ケース、例えばセラミックス製の一側面開放のケース内に耐熱性充填材を充填するものを使用でき、透明であると仮定して点線で示してある。
21及び22は外被体1内に所定の間隔を隔てて横に並行に配置された第1抵抗器及び第2抵抗器であり、セラミックス等の耐熱コアの両端にキャツプ状電極21a,21b、22a,22bを装着し、コアにニッケル−クロム合金線、銅−ニッケル合金線、銅−マンガン−ニッケル合金線等の抵抗線を巻き付け、その巻き付け抵抗線の両端をコア両端の各キャツプ状電極21a,21b、22a,22bの周面に溶接等により結着してある。
4A is a top view showing another embodiment of the resistor with a thermal fuse according to the present invention, FIG. 4B is a side view, and FIG. 4C is a front view. For convenience of explanation, the outer casing is illustrated as being transparent.
In FIG. 4, reference numeral 1 denotes an outer cover, for example, a heat resistant case, for example, a case in which a heat resistant filler is filled in a case opened on one side made of ceramics, and is indicated by a dotted line assuming that it is transparent. .
Reference numerals 21 and 22 denote a first resistor and a second resistor, which are arranged in parallel in the outer casing 1 at a predetermined interval. Cap-shaped electrodes 21a, 21b, 22a and 22b are mounted, and resistance wires such as nickel-chromium alloy wire, copper-nickel alloy wire, copper-manganese-nickel alloy wire are wound around the core, and both ends of the wound resistance wire are connected to the respective cap-shaped electrodes 21a at both ends of the core. , 21b, 22a, 22b are bonded by welding or the like.

3は温度ヒューズであり、抵抗器より短尺の本体部30の両側にリード導体3a,3bを有しており、例えば、アキシャル型を用いることができる。
この温度ヒューズ3の本体部30が前記左右の第1抵抗器21と第2抵抗器22との間に抵抗器21,22と並行になる向きで配設されている。
温度ヒューズ本体30のリード導体3aが第2抵抗器22のキャップ状電極22aの端面に直角に折り曲げのうえ側面接触で溶接され、、温度ヒューズ本体30のリード導体3bが折り返され、更に第1抵抗器のキャップ状電極21aの端面に直角に折り曲げのうえ側面接触で溶接されている。而して、第1抵抗器21と第2抵抗器22との間に温度ヒューズ3が直列に接続されている。第1抵抗器21のキャップ状電極21bの端面には脚導体Aが側面接触で溶接され、第2抵抗器22のキャップ状電極22bの端面には脚導体Bが側面接触で溶接され、これらの脚導体A、Bが外被体1の下面から突出されている。
第1抵抗器21のキャップ状電極21aの端面に溶接された脚導体Aと第2抵抗器22のキャップ状電極22bの端面に溶接された脚導体Bとは充分な横方向間隔でずらされている。
Reference numeral 3 denotes a thermal fuse, which has lead conductors 3a and 3b on both sides of the main body 30 that is shorter than the resistor. For example, an axial type can be used.
The main body 30 of the thermal fuse 3 is disposed between the left and right first resistors 21 and the second resistor 22 in a direction parallel to the resistors 21 and 22.
The lead conductor 3a of the thermal fuse body 30 is bent at right angles to the end face of the cap-like electrode 22a of the second resistor 22 and welded by side contact, the lead conductor 3b of the thermal fuse body 30 is folded back, and further the first resistance It is bent at a right angle to the end face of the cap-shaped electrode 21a of the vessel and welded by side contact. Thus, the thermal fuse 3 is connected in series between the first resistor 21 and the second resistor 22. The leg conductor A is welded to the end face of the cap-shaped electrode 21b of the first resistor 21 by side contact, and the leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. Leg conductors A and B protrude from the lower surface of the jacket 1.
The leg conductor A welded to the end face of the cap-shaped electrode 21a of the first resistor 21 and the leg conductor B welded to the end face of the cap-shaped electrode 22b of the second resistor 22 are shifted by a sufficient lateral distance. Yes.

この横方向間隔を設定するために、第1抵抗器21のキャップ状電極21bの端面と脚導体Aとの溶接位置を同キャップ状電極端面外周の左側サイド(図示の−方向)に近付けるように横方向にずらせ、第2抵抗器22のキャップ状電極22bの端面と脚導体Bとの溶接位置を同キャップ状電極端面外周の右側サイド(図示の+方向)に近付けるように横方向にずらせてある。   In order to set the lateral spacing, the welding position between the end face of the cap-shaped electrode 21b of the first resistor 21 and the leg conductor A is brought closer to the left side (the negative direction in the figure) of the outer periphery of the cap-shaped electrode end face. Shift in the horizontal direction and shift the welding position between the end face of the cap-shaped electrode 22b of the second resistor 22 and the leg conductor B in the horizontal direction so as to approach the right side (the + direction in the figure) of the outer periphery of the cap-shaped electrode end face. is there.

図3−図4に示す温度ヒューズ付き抵抗器においては、第1抵抗器21、第2抵抗器22を横に並行に配設してあるから、上下に配設した図1−2の温度ヒューズ付き抵抗器に較べ外被体の高さを低くできる。ただし、外被体の巾は大きくなる。
温度ヒューズの作動迅速性、実装はんだ付け時での温度ヒューズの安全性等については図1−2の温度ヒューズ付き抵抗器と実質的に差はない。
3 to 4, the first resistor 21 and the second resistor 22 are arranged in parallel in the horizontal direction, so that the temperature fuse shown in FIG. The height of the outer casing can be reduced compared to the attached resistor. However, the width of the outer casing is increased.
The operational speed of the thermal fuse, the safety of the thermal fuse during mounting soldering, etc. are not substantially different from the resistor with the thermal fuse of FIG.

上記の実施例では、第1抵抗器と第2抵抗器との間に温度ヒューズを直列接続しているが、第1抵抗器と第2抵抗器とを直列接続し、これに温度ヒューズを直列接続することもできる。この場合、両端にキャップ状電極を有する第1抵抗器及び第2抵抗器と、本体部の両側にリード導体を有しその本体長さが抵抗器の長さよりも短尺の温度ヒューズとが絶縁外被体内に互いに並行にかつ抵抗器の長手方向と外被体の長手方向とが一致する向きで配設され、温度ヒューズの一方のリード導体が第1抵抗器の一方のキャップ状電極端面に接合され、第1抵抗器の他方のキャップ状電極端面と第2抵抗器の一方のキャップ状電極端面との間に連結導体が接合され、第2抵抗器の他方のキャップ状電極端面に脚導体が接合され、温度ヒューズの他方のリード導体に脚導体Aに並行な脚部B’が形成され、脚導体A及び脚部B’が外被体の下面から突出される。温度ヒューズのリード導体と抵抗器の一方のキャップ状電極端面との接合、第1抵抗器の他方のキャップ状電極端面と第2抵抗器の一方のキャップ状電極端面との間への連結導体の接合、抵抗器のキャップ状電極端面への脚導体の接合には、側面接触での溶接により行うことができる。脚部B’が形成されるリード導体及び脚導体Aに錫メッキ銅被覆鉄線または鋼線を用いることができる。かかる構成によれば、脚部B’が実装時はんだ付けされる温度ヒューズリード導体が錫メッキ銅被覆鉄線または鋼線とされるから、その実装時はんだ付け箇所から温度ヒューズエレメントヘの熱伝導路の熱導電抵抗が鉄線または鋼線のために高く、また、実装時はんだ付けされる脚導体A→第1または第2抵抗器→連結導体→第2または第1抵抗器→温度ヒューズリード導体→ヒューズエレメントの熱伝導路の熱導電抵抗が抵抗器の抵抗線のために高く、実装時はんだ付けでのヒューズエレメントの熱的損傷を効果的に防止できる。また、錫メッキのために実装時はんだ付けの信頼性を向上できる。更に、脚部B’を有する片側の温度ヒューズリード導体を他側のリード導体よりも長くするように温度ヒューズ本体を位置させると、そのリード導体の実装時はんだ付け箇所から温度ヒューズエレメントヘの熱伝導路の熱伝導抵抗が充分に高くなり、他側のリード導体においては抵抗器を経て実装時はんだ付け熱が伝達される、その実装時はんだ付け箇所から温度ヒューズエレメントに至る熱伝導路の熱伝導抵抗も高く、実装時はんだ付けでのヒューズエレメントの熱的損傷をより一層効果的に防止できる。
脚部B’が形成されるリード導体と脚導体とが同材質で、かつ同径とすることもできる。また、脚部B’が形成されたリード導体の当該脚部及び脚導体に実装基板の穴に嵌合される突起又は、はんだに係止される屈曲部若しくは凹凸部を設けることもできる。
In the above embodiment, the temperature fuse is connected in series between the first resistor and the second resistor. However, the first resistor and the second resistor are connected in series, and the temperature fuse is connected in series thereto. It can also be connected. In this case, the first resistor and the second resistor having cap-shaped electrodes at both ends, and the thermal fuse having a lead conductor on both sides of the main body and whose main body length is shorter than the length of the resistor are not insulated. Arranged parallel to each other in the body so that the longitudinal direction of the resistor coincides with the longitudinal direction of the outer body, and one lead conductor of the thermal fuse is joined to one cap-shaped electrode end surface of the first resistor A connecting conductor is joined between the other cap-shaped electrode end surface of the first resistor and one cap-shaped electrode end surface of the second resistor, and a leg conductor is connected to the other cap-shaped electrode end surface of the second resistor. A leg B ′ parallel to the leg conductor A is formed on the other lead conductor of the thermal fuse, and the leg conductor A and the leg B ′ are projected from the lower surface of the jacket. Joining between the lead conductor of the thermal fuse and one cap-like electrode end face of the resistor, and the connection conductor between the other cap-like electrode end face of the first resistor and one cap-like electrode end face of the second resistor Joining and joining of the leg conductor to the end face of the cap-shaped electrode of the resistor can be performed by welding with side contact. A tin-plated copper-coated iron wire or a steel wire can be used for the lead conductor and the leg conductor A on which the leg B ′ is formed. According to such a configuration, since the thermal fuse lead conductor to which the leg B ′ is soldered at the time of mounting is a tin-plated copper-clad iron wire or steel wire, the heat conduction path from the soldered portion at the time of mounting to the thermal fuse element The heat conduction resistance of the iron conductor or the steel wire is high, and the leg conductor A to be soldered at the time of mounting → first or second resistor → connection conductor → second or first resistor → thermal fuse lead conductor → The heat conduction resistance of the heat conduction path of the fuse element is high due to the resistance wire of the resistor, and it is possible to effectively prevent thermal damage of the fuse element during soldering during mounting. Moreover, the reliability of soldering at the time of mounting can be improved because of tin plating. Further, when the thermal fuse body is positioned so that the thermal fuse lead conductor on one side having the leg part B ′ is longer than the lead conductor on the other side, the heat from the soldered portion when mounting the lead conductor to the thermal fuse element The heat conduction resistance of the conduction path becomes sufficiently high, and the soldering heat at the time of mounting is transmitted through the resistor on the lead conductor on the other side. The heat of the heat conduction path from the soldering point at the time of mounting to the thermal fuse element The conduction resistance is also high, and thermal damage to the fuse element due to soldering during mounting can be more effectively prevented.
The lead conductor and the leg conductor on which the leg B ′ is formed can be made of the same material and have the same diameter. In addition, the leg portion of the lead conductor on which the leg portion B ′ is formed and a protrusion fitted into the hole of the mounting substrate on the leg conductor, or a bent portion or an uneven portion locked to the solder can be provided.

前記何れの実施例においても、温度ヒューズのリード導体と抵抗器側面との間、または、脚導体とキャップ状電極端面との間、またはリード導体とキャップ状電極端面との間の少なくとも何れかに耐熱性絶縁材を介在さつせる、またはそのリード導体部分または脚導体部分に耐熱性絶縁チューブを挿通することができる。   In any of the embodiments described above, at least either between the lead conductor of the thermal fuse and the resistor side surface, between the leg conductor and the cap-shaped electrode end surface, or between the lead conductor and the cap-shaped electrode end surface. A heat-resistant insulating material can be interposed, or a heat-resistant insulating tube can be inserted into the lead conductor portion or the leg conductor portion.

前記温度ヒューズとしては、動作温度(0.1A以下の電流で1分間に1℃上昇するオイル中で通電が遮断されるときのオイル温度)110℃〜160℃のものが使用される。
温度ヒューズとしては、ラジアルタイプを使用することもできる。例えば、並行リード導体の先端部間にヒューズエレメントを接続し、ヒューズエレメントにフラックスを塗布し、このフラックス塗布ヒューズエレメントに一端開口の絶縁体ケース(例えばセラミックスケース)を被せ、開口とリード導体との間を耐熱性樹脂で封止したものを使用することもできる。
As the thermal fuse, one having an operating temperature (oil temperature when energization is interrupted in oil that rises 1 ° C. per minute at a current of 0.1 A or less) 110 ° C. to 160 ° C. is used.
A radial type can also be used as the thermal fuse. For example, a fuse element is connected between the tips of parallel lead conductors, a flux is applied to the fuse element, and an insulator case (for example, a ceramic case) with one end opening is covered on the flux-applied fuse element. What sealed the space | interval with the heat resistant resin can also be used.

前記外被体にケースタイプを使用する場合、ケース1内に封止材が充填される。この封止材には、無機質粉末に硬化性樹脂のバインダーを配合したものを使用できる。無機質粉末には、粉末状の石英、アルミナ、雲母、ジルコニア、二酸化チタン等を使用でき、バインダーにはシリコン樹脂を使用できる。無機質粉末料は99〜96重量%とされ、シリコン樹脂量は1〜4重量%とされる。
ケース内には、抵抗器や温度ヒューズ本体を位置決めするための仕切りを設けることもできる。
外被体には、耐熱樹脂をトランスファーモールド等によりモールドするケース無しのものも使用できる。
When a case type is used for the outer casing, the case 1 is filled with a sealing material. As this sealing material, an inorganic powder blended with a curable resin binder can be used. As the inorganic powder, powdered quartz, alumina, mica, zirconia, titanium dioxide or the like can be used, and a silicon resin can be used as the binder. The inorganic powder is 99 to 96% by weight, and the silicon resin amount is 1 to 4% by weight.
A partition for positioning the resistor and the thermal fuse body can also be provided in the case.
As the outer casing, a case without a case in which a heat-resistant resin is molded by transfer molding or the like can be used.

前記の抵抗器には、金属または炭素等の薄膜を円筒形や平面状の絶縁体上に形成したものを抵抗素子とする金属薄膜抵抗器または炭素皮膜抵抗器、炭素粉末等の抵抗材料にフエノール樹脂、ガラス等の粉末を混合して芯状に加圧成形したものを抵抗素子とするソリッド抵抗器等も使用できる。   The resistor includes a metal thin film resistor or a carbon film resistor having a thin film made of metal or carbon formed on a cylindrical or planar insulator as a resistance element, and a phenol material as a resistance material such as carbon powder. A solid resistor or the like having a resistance element formed by mixing a powder of resin, glass or the like and press-molding it into a core can also be used.

本発明に係る温度ヒューズ付き抵抗器の一実施例を示す図面である。It is drawing which shows one Example of the resistor with a thermal fuse which concerns on this invention. 本発明に係る温度ヒューズ付き抵抗器の上記とは別の実施例を示す図面である。It is drawing which shows another Example different from the above of the resistor with the temperature fuse which concerns on this invention. 本発明に係る温度ヒューズ付き抵抗器の上記とは別の実施例を示す図面である。It is drawing which shows another Example different from the above of the resistor with the temperature fuse which concerns on this invention. 本発明に係る温度ヒューズ付き抵抗器の上記とは別の実施例を示す図面である。It is drawing which shows another Example different from the above of the resistor with the temperature fuse which concerns on this invention. 従来の温度ヒューズ付き抵抗器を示す図面である。It is drawing which shows the resistor with the conventional temperature fuse. 温度ヒューズ付き抵抗器の使用状態を示す図面である。It is drawing which shows the use condition of the resistor with a thermal fuse.

符号の説明Explanation of symbols

1 外被体
21 第1抵抗器
22 第3抵抗器
21a キャップ状電極
21b キャップ状電極
22a キャップ状電極
22b キャップ状電極
3 温度ヒューズ
30 温度ヒューズ本体
3a 温度ヒューズリード導体
3b 温度ヒューズリード導体
A 脚導体
B 脚導体
B’ 温度ヒューズリード導体の脚部
DESCRIPTION OF SYMBOLS 1 Outer body 21 1st resistor 22 3rd resistor 21a Cap-shaped electrode 21b Cap-shaped electrode 22a Cap-shaped electrode 22b Cap-shaped electrode 3 Thermal fuse 30 Thermal fuse body 3a Thermal fuse lead conductor 3b Thermal fuse lead conductor A Leg conductor B Leg conductor B 'Leg of thermal fuse lead conductor

Claims (14)

両端にキャップ状電極を有する第1抵抗器及び第2抵抗器と、本体部の両側にリード導体を有しその本体長さが抵抗器の長さよりも短尺の温度ヒューズとが絶縁外被体内に互いに並行にかつ抵抗器の長手方向と外被体の長手方向とが一致する向きで配設され、温度ヒューズの一方のリード導体が第1抵抗器の一方のキャップ状電極端面に接合され、温度ヒューズの他方のリード導体が第2抵抗器の一方のキャップ状電極端面に接合され、第1抵抗器の他方のキャップ状電極端面に脚導体Aが、第2抵抗器の他方のキャップ状電極端面に脚導体Bがそれぞれ接合され、これらの脚導体が外被体の下面から突出されていることを特徴とする温度ヒューズ付き抵抗器。 A first resistor and a second resistor having cap-shaped electrodes at both ends, and a thermal fuse having a lead conductor on both sides of the main body and a length of the main body shorter than the length of the resistor are provided in the insulating envelope. Parallel to each other and arranged in a direction in which the longitudinal direction of the resistor and the longitudinal direction of the outer casing coincide with each other, one lead conductor of the thermal fuse is joined to one cap-shaped electrode end surface of the first resistor, The other lead conductor of the fuse is joined to one cap-like electrode end face of the second resistor, the leg conductor A is connected to the other cap-like electrode end face of the first resistor, and the other cap-like electrode end face of the second resistor. A resistor with a thermal fuse, characterized in that leg conductors B are joined to each other, and these leg conductors protrude from the lower surface of the jacket. 温度ヒューズのリード導体と抵抗器のキャップ状電極端面との接合及び抵抗器のキャップ状電極端面と脚導体との接合が、側面接触での溶接により行われていることを特徴とする請求項1記載の温度ヒューズ付き抵抗器。 2. The bonding between the lead conductor of the thermal fuse and the cap-shaped electrode end surface of the resistor and the bonding of the cap-shaped electrode end surface of the resistor and the leg conductor are performed by welding in side contact. Resistor with thermal fuse as described. 第1抵抗器が第2抵抗器の上方に配設され、温度ヒューズの本体部が両抵抗器の間に挾まれ、第1抵抗器に接合された脚導体Aが下方配設の第2抵抗器の片側のキャップ状電極端面上を所定の間隔を隔て、しかも同キャップ状電極端面に接合された脚導体Bまたは同キャップ状電極端面に接合された温度ヒューズリード導体に対し横方向にずらされて延在していることを特徴とする請求項1または2記載の温度ヒューズ付き抵抗器。 The first resistor is disposed above the second resistor, the main body of the thermal fuse is sandwiched between the two resistors, and the leg conductor A joined to the first resistor is the second resistor disposed below. The side of the cap-like electrode end face on one side of the device is spaced apart from the leg conductor B joined to the end face of the cap-like electrode or the temperature fuse lead conductor joined to the end face of the cap-like electrode. The resistor with a thermal fuse according to claim 1, wherein the resistor has a thermal fuse. 所定の間隔箇所の絶縁強度が温度ヒューズ作動後のヒューズエレメント分断間の絶縁強度と同等若しくはやや高くされていることを特徴とする請求項3記載の温度ヒューズ付き抵抗器。 4. The resistor with a thermal fuse according to claim 3, wherein the insulation strength at a predetermined interval is equal to or slightly higher than the insulation strength between the fuse elements after the thermal fuse is activated. 第1抵抗器が第2抵抗器の横に配設され、温度ヒューズの本体部が両抵抗器間に挾まれていることを特徴とする請求項1または2記載の温度ヒューズ付き抵抗器。 3. The resistor with a thermal fuse according to claim 1, wherein the first resistor is disposed beside the second resistor, and a main body portion of the thermal fuse is sandwiched between both resistors. 脚導体に実装基板の穴に嵌合される突起又は、はんだに係止される屈曲部若しくは凹凸部が設けられていることを特徴とする請求項1〜5何れか記載の温度ヒューズ付き抵抗器。 A resistor with a thermal fuse according to any one of claims 1 to 5, wherein the leg conductor is provided with a protrusion fitted into a hole of the mounting board, or a bent portion or an uneven portion locked with solder. . 脚導体A、Bの外被体下面での突出位置が外被体下面の対角線上にあることを特徴とする請求項1〜6何れか記載の温度ヒューズ付き抵抗器。 The resistor with a thermal fuse according to any one of claims 1 to 6, wherein the protruding positions of the leg conductors A and B on the lower surface of the outer casing are on the diagonal line of the lower surface of the outer casing. 両端にキャップ状電極を有する第1抵抗器及び第2抵抗器と、本体部の両側にリード導体を有しその本体長さが抵抗器の長さよりも短尺の温度ヒューズとが絶縁外被体内に互いに並行にかつ抵抗器の長手方向と外被体の長手方向とが一致する向きで配設され、温度ヒューズの一方のリード導体が第1抵抗器の一方のキャップ状電極端面に側面接触で接合され、第1抵抗器の他方のキャップ状電極端面と第2抵抗器の一方のキャップ状電極端面との間に連結導体が側面接触で接合され、第2抵抗器の他方のキャップ状電極端面に脚導体Aが側面接触で接合され、温度ヒューズの他方のリード導体に脚導体Aに並行な脚部B’が形成され、脚導体A及び脚部B’が外被体の下面から突出されていることを特徴とする温度ヒューズ付き抵抗器。 A first resistor and a second resistor having cap-shaped electrodes at both ends, and a thermal fuse having a lead conductor on both sides of the main body and a length of the main body shorter than the length of the resistor are provided in the insulating envelope. Parallel to each other and arranged so that the longitudinal direction of the resistor and the longitudinal direction of the outer casing coincide with each other, and one lead conductor of the thermal fuse is joined to one cap-shaped electrode end surface of the first resistor by side contact. And a connecting conductor is joined by side contact between the other cap-shaped electrode end surface of the first resistor and one cap-shaped electrode end surface of the second resistor, and is connected to the other cap-shaped electrode end surface of the second resistor. The leg conductor A is joined by side contact, the leg lead B ′ parallel to the leg conductor A is formed on the other lead conductor of the thermal fuse, and the leg conductor A and leg B ′ are projected from the lower surface of the jacket. A resistor with a thermal fuse, characterized in that 脚部B’が形成されリード導体及び脚導体Aが錫メッキ銅被覆鉄線または鋼線であることを特徴とする請求項8記載の温度ヒューズ付き抵抗器。 9. A resistor with a thermal fuse according to claim 8, wherein the leg B 'is formed and the lead conductor and the leg conductor A are tin-plated copper-clad iron wire or steel wire. 脚部B’が形成された他方のリード導体の長さが一方のリード導体の長さよりも長くなるように温度ヒューズの本体部の位置が設定されていることを特徴とする請求項8または9記載の温度ヒューズ付き抵抗器。 10. The position of the body portion of the thermal fuse is set so that the length of the other lead conductor on which the leg portion B ′ is formed is longer than the length of the one lead conductor. Resistor with thermal fuse as described. 脚部B’が形成されたリード導体と脚導体とが同材質で、かつ同径とされていることを特徴とする請求項8〜10何れか記載の温度ヒューズ付き抵抗器。 11. The resistor with a thermal fuse according to claim 8, wherein the lead conductor on which the leg portion B 'is formed and the leg conductor are made of the same material and have the same diameter. 脚部B‘が形成されたリード導体の当該脚部及び脚導体に実装基板の穴に嵌合される突起又は、はんだに係止される屈曲部若しくは凹凸部が設けられていることを特徴とする請求項8〜11何れか記載の温度ヒューズ付き抵抗器。 A feature of the present invention is that the leg conductor of the lead conductor on which the leg B ′ is formed and a protrusion fitted into the hole of the mounting board on the leg conductor or a bent part or an uneven part latched by the solder are provided. The resistor with a thermal fuse in any one of Claims 8-11. 温度ヒューズのリード導体と抵抗器側面との間、または、脚導体とキャップ状電極端面との間、またはリード導体とキャップ状電極端面との間の少なくとも何れかに耐熱性絶縁材が介在され、またはそのリード導体部分または脚導体部分に耐熱性絶縁チューブが挿通されていることを特徴とする請求項1〜12何れか記載の温度ヒューズ付き抵抗器。 A heat-resistant insulating material is interposed between the lead conductor of the thermal fuse and the resistor side surface, or between the leg conductor and the cap-shaped electrode end surface, or between the lead conductor and the cap-shaped electrode end surface, 13. The resistor with a thermal fuse according to claim 1, wherein a heat-resistant insulating tube is inserted through the lead conductor portion or the leg conductor portion. 絶縁外被体が、一側面開口の絶縁ケース内に絶縁封止材が充填されたケースタイプとされていることを特徴とする請求項1〜13何れか記載の温度ヒューズ付き抵抗器。 14. The resistor with a thermal fuse according to claim 1, wherein the insulating jacket is a case type in which an insulating sealing material is filled in an insulating case having one side opening.
JP2007040160A 2007-02-21 2007-02-21 Resistor with temperature fuse Pending JP2008204832A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014098540A1 (en) * 2012-12-21 2014-06-26 스마트전자 주식회사 Fuse resistor, and method for manufacturing same
CN104733142A (en) * 2013-12-20 2015-06-24 斯玛特电子公司 Fuse resistor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014098540A1 (en) * 2012-12-21 2014-06-26 스마트전자 주식회사 Fuse resistor, and method for manufacturing same
CN104246920A (en) * 2012-12-21 2014-12-24 斯玛特电子公司 Fuse resistor and manufacturing method thereof
KR101496526B1 (en) * 2012-12-21 2015-02-27 스마트전자 주식회사 Fuse resistor and manufacturing method thereof
JP2015515108A (en) * 2012-12-21 2015-05-21 スマート エレクトロニクス インク Fuse resistor and manufacturing method thereof
CN104733142A (en) * 2013-12-20 2015-06-24 斯玛特电子公司 Fuse resistor

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