JP2010061894A

JP2010061894A - Resistor with temperature fuse

Info

Publication number: JP2010061894A
Application number: JP2008224519A
Authority: JP
Inventors: Izumi Sakai; 和泉酒井; Yasuhiko Tomitaka; 康彦冨高
Original assignee: Uchihashi Estec Co Ltd
Current assignee: Uchihashi Estec Co Ltd
Priority date: 2008-09-02
Filing date: 2008-09-02
Publication date: 2010-03-18

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three or four leg type resistor with a temperature fuse having improved supporting stability and operating swiftness while functioning not only as a series connector between the resistor and the temperature fuse but also as the independent resistor or temperature fuse. <P>SOLUTION: One lead conductor 3b of the temperature fuse 30 is bonded to the end face of one cap electrode 21b of the first resistor 21, and the other lead conductor 3a of the temperature fuse 30 is bonded to the end face of one cap electrode 22a of the second resistor 22. A leg conductor A, a leg conductor B and a leg conductor C are bonded to the end face of the other cap electrode 21a of the first resistor 21, to the end face of the other cap electrode 22b of the second resistor 22, and to the end face of one cap electrode 21b or 22a of one or both of the resistors 21, 22, respectively. These leg conductors are protruded on the lower face side of an outer cover 1. <P>COPYRIGHT: (C)2010,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、抵抗器と温度ヒューズとを直列に接続すると共に両者を近接配設した構成であり、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。
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 A resistor with a thermal fuse is a configuration in which a resistor and a thermal fuse are connected in series and both are arranged close to each other. When the resistor is heated to an allowable temperature due to an overcurrent, the thermal fuse is activated. Energization is cut off and accidents such as fires are prevented.
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。
電子機器の回路は、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ことがあ。 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'.
A circuit of an electronic device is assembled by mounting a circuit element on a predetermined circuit board, and a resistor with a thermal fuse may be mounted on the circuit board as one of the circuit elements.

従来の温度ヒューズ付き抵抗器は、二脚方式であり、安定な実装支持状態を確保し難く、振動に対し問題がある。
従来の温度ヒューズ付き抵抗器は、２端子であり、抵抗器と温度ヒューズとの直列接続体のみの回路要素として使用し得るだけであり、温度ヒューズ単独または抵抗器単独あるいは異なる抵抗値の抵抗器・温度ヒューズ直列接続体として使用することは望めない。 A conventional resistor with a thermal fuse is a two-leg system, and it is difficult to secure a stable mounting support state, and there is a problem with vibration.
A conventional resistor with a thermal fuse has two terminals and can only be used as a circuit element of a series connection body of a resistor and a thermal fuse, and a thermal fuse alone or a resistor alone or a resistor having a different resistance value・ It cannot be used as a thermal fuse series connection.

本発明の目的は、３脚または４脚方式であって、抵抗器と温度ヒューズとの直列接続体としてのみならず、抵抗器単独、温度ヒューズ単独あるいは異なる抵抗値の抵抗器・温度ヒューズ直列接続体としても使用でき、しかも支持安定性、動作迅速性に優れた温度ヒューズ付き抵抗器を提供することにある。 The object of the present invention is a three-leg or four-leg system, and not only as a series connection body of a resistor and a thermal fuse, but also as a resistor alone, a thermal fuse alone, or a resistor / thermal fuse series connection of different resistance values An object of the present invention is to provide a resistor with a thermal fuse that can be used as a body and has excellent support stability and quick operation.

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、一対のリード導体を有する温度ヒューズとが絶縁外被体内に互いに並行にで両抵抗器間に温度ヒューズが挟まれて配設され、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、両抵抗器の一方または双方の一方のキャップ状電極端面に脚導体Ｃがそれぞれ接合され、これらの脚導体が外被体の下面側に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、抵抗器のキャップ状電極端面と脚導体とのの接合が、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４に係る温度ヒューズ付き抵抗器は、請求項１〜３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５に係る温度ヒューズ付き抵抗器は、請求項１〜４何れかの温度ヒューズ付き抵抗器において、絶縁外被体が絶縁封止材充填の下側開放の扁平ケースであり、絶縁封止材露出下面から各脚導体が突出さ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、温度ヒューズがラジアル型とされ、該温度ヒューズの対称軸の向きが両抵抗器の長さ方向に直角な方向に向くように温度ヒューズが配置さ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１〜５何れかの温度ヒューズ付き抵抗器において、温度ヒューズがアキシャル型とされ、該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に接合され、温度ヒューズの他方のリード導体が折り返されて前記一方のキャップ状電極と同じ側の第２抵抗器キャップ状電極に接合され、該キャップ状電極に脚導体Ｃが接合されていることを特徴とする。
請求項８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、温度ヒューズがラジアル型とされ、温度ヒューズの封止部を温度ヒューズのケースよりも抵抗器のキャップ状電極に近く位置させるように温度ヒューズが配置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１〜８何れかの温度ヒューズ付き抵抗器において、脚導体Ｃが温度ヒューズのリード導体と連続一体とされていることを特徴とする。 According to a first aspect of the present invention, there is provided a resistor with a thermal fuse, wherein a first resistor and a second resistor having cap-shaped electrodes at both ends, and a thermal fuse having a pair of lead conductors are parallel to each other in an insulating envelope. A thermal fuse is disposed between the resistors, one lead conductor of the thermal fuse is joined to one end face of the cap-like electrode of the first resistor, and the other lead conductor of the thermal fuse is connected to the second resistor. Bonded to one cap-shaped electrode end face, the leg conductor A is connected to the other cap-shaped electrode end face of the first resistor, and the leg conductor B is connected to the other cap-shaped electrode end face of the second resistor. Leg conductors C are joined to the end faces of one of the cap-shaped electrodes, respectively, and these leg conductors are projected to the lower surface side 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 end face of the cap-shaped electrode of the resistor are joined by side contact welding. It is characterized by being.
The resistor with a thermal fuse according to claim 3 is the resistor with a thermal fuse according to claim 1 or 2, wherein the cap-shaped electrode end face of the resistor and the leg conductor are joined by welding in side contact. It is characterized by being.
A resistor with a thermal fuse according to claim 4 is the resistor with a thermal fuse according to any one of claims 1 to 3, 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.
A resistor with a thermal fuse according to claim 5 is the resistor with a thermal fuse according to any one of claims 1 to 4, wherein the insulating outer cover is a flat case open on the lower side filled with an insulating sealing material, Each leg conductor protrudes from the exposed lower surface of the material.
A resistor with a temperature fuse according to claim 6 is the resistor with a temperature fuse according to any one of claims 1 to 5, wherein the temperature fuse is a radial type, and the direction of the symmetry axis of the temperature fuse is the length of both resistors. The thermal fuse is arranged so as to face in a direction perpendicular to the direction.
A resistor with a temperature fuse according to claim 7 is the resistor with a temperature fuse according to any one of claims 1 to 5, wherein the temperature fuse is an axial type, and one lead conductor of the temperature fuse is one of the first resistors. The other lead conductor of the thermal fuse is folded back and joined to the second resistor cap-like electrode on the same side as the one cap-like electrode, and the leg conductor C is joined to the cap-like electrode. It is characterized by being.
A resistor with a temperature fuse according to claim 8 is the resistor with a temperature fuse according to any one of claims 1 to 5, wherein the temperature fuse is a radial type, and the sealing portion of the temperature fuse is a resistor than the case of the temperature fuse. A thermal fuse is arranged so as to be positioned close to the cap-shaped electrode.
A resistor with a thermal fuse according to a ninth aspect is the resistor with a thermal fuse according to any one of the first to eighth aspects, wherein the leg conductor C is continuously integrated with the lead conductor of the thermal fuse.

（１）本発明に係る温度ヒューズ付き抵抗器は、回路の入力端と出力端との途中に組み込んで使用され、回路に過電流が流れると第１抵抗器及び第２抵抗器が発熱し、その発生熱で温度ヒューズが溶断作動して回路の通電が遮断される。この場合、例えば、図１−１において、脚導体Ａ−Ｃ間に第１抵抗器２１の電圧変動が現れ、脚導体Ｃ−Ｂ間に温度ヒューズ３０と第２抵抗器２２との直列接続体の電圧変動が現れるように、抵抗器単独、別の抵抗器・温度ヒューズ直列接続体等の電圧変動も回路の駆動・制御に使用できる。
（２）脚導体の本数が３または４本であり、これらによる支点の抵抗器の長手方向に対する間隔が抵抗器の長さにほぼ等しく、また横方向に対する間隔が、並行抵抗器間に温度ヒューズが挾まれているために充分に広い。従って、２箇の抵抗器と１箇の温度ヒューズとの連結体を３点支持または４点支持により充分安定に支持できる。
（３）温度ヒューズが抵抗器間に挾まれているから、温度ヒューズが抵抗器の発生熱で迅速に加熱される。従って、抵抗器の発生熱の一部が脚導体Ｃを伝い漏洩して温度ヒューズのリード導体を経て温度ヒューズに伝達される抵抗器発生熱が減少されても、温度ヒューズの作動迅速性をよく保証できる。
（４）請求項５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。 (1) A resistor with a thermal fuse according to the present invention is used by being incorporated in the middle of an input end and an output end of a circuit. When an overcurrent flows in the circuit, the first resistor and the second resistor generate heat, The thermal fuse is blown by the generated heat and the circuit is cut off. In this case, for example, in FIG. 1-1, voltage fluctuation of the first resistor 21 appears between the leg conductors A-C, and the series connection body of the thermal fuse 30 and the second resistor 22 between the leg conductors C-B. Thus, voltage fluctuations such as a single resistor or another resistor / thermal fuse series connection can be used for driving and controlling the circuit.
(2) The number of leg conductors is 3 or 4, and the distance between the fulcrum and the longitudinal direction of the resistor is approximately equal to the length of the resistor, and the lateral distance is between the parallel resistors. Wide enough to contain Therefore, the connection body of two resistors and one thermal fuse can be supported sufficiently stably by three-point support or four-point support.
(3) Since the thermal fuse is sandwiched between the resistors, the thermal fuse is quickly heated by the heat generated by the resistor. Therefore, even if a part of the heat generated by the resistor leaks through the leg conductor C and the heat generated by the resistor transmitted to the temperature fuse via the lead conductor of the temperature fuse is reduced, the operation speed of the temperature fuse is improved. Can be guaranteed.
(4) In the resistor with a thermal fuse of claim 5, 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.

図１−１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１−１の（ロ）は同じく側面図、図１−１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１−１において、１は外被体、例えば絶縁封止材充填の下側開放の扁平ケースであり、絶縁封止材露出下面から後述するように各脚導体が突出されており、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。 1-1 (a) is a top view showing an embodiment of a resistor with a thermal fuse according to the present invention, (b) in FIG. 1-1 is a side view, and (c) in FIG. It is a front view, and for convenience of explanation, the outer casing is illustrated as being transparent.
In FIG. 1-1, reference numeral 1 denotes an outer cover body, for example, a flat case that is open on the lower side filled with an insulating sealing material. Each leg conductor protrudes from the exposed lower surface of the insulating sealing material and is transparent. Assuming there is a dotted line.
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、アキシャル型を用いることができる。例えば、一直線で対向させたリード導体間に低融点可溶合金片を溶接し、低融点可溶合金片にフラックスを塗布し、このフラックス塗布低融点可溶合金片上に耐熱絶縁筒を挿通し、耐熱絶縁筒の各端と各リード導体との間を封止材（例えば、エポキシ樹脂接着剤）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挟まれて配設されている。 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, and an axial type can be used. For example, a low melting point soluble alloy piece is welded between the lead conductors facing each other in a straight line, a flux is applied to the low melting point soluble alloy piece, and a heat-resistant insulating cylinder is inserted over the flux coated low melting point soluble alloy piece, What sealed the space between each end of a heat-resistant insulating cylinder and each lead conductor with a sealing material (for example, epoxy resin adhesive) can be used.
A main body 30 of the thermal fuse 3 is disposed between the left and right first resistors 21 and 22 in a direction parallel to the resistors 21 and 22.

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、第１抵抗器２１のキャップ状電極２１ｂの端面には脚導体Ｃが側面接触で溶接され、これらの脚導体Ａ、Ｂ、Ｃが外被体１の下面から突出されている。 One 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 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 temperature 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 electrode 21b and welded by side contact. A leg conductor A is welded to the end face of the cap-shaped electrode 21a of the first resistor 21 by side contact, and a leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. A leg conductor C is welded to the end face of the cap-shaped electrode 21 b of the resistor 21 by side contact, and these leg conductors A, B, C are projected from the lower surface of the outer cover 1.

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Ｃ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との間隔ｄを広くするように、脚導体Ｃと第１抵抗器２１のキャップ状電極２１ｂとの溶接点を、その端面の中心より図１の（ハ）に示す−方向にずらし、脚導体Ｂと第２抵抗器２２のキャップ状電極２２ｂとの溶接点を、その端面の中心より図１の（ハ）に示す＋方向にずらしてある。また、脚導体Ａと脚導体Ｂとの間隔、脚導体Ａと脚導体Ｃとの間隔もほぼ抵抗器の長さとされており、充分に広くされている。 The leg conductor C is widened so that the distance d between the leg conductor C welded to the end face of the cap-shaped electrode 21b 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 is increased. The welding point between the conductor C and the cap-shaped electrode 21b of the first resistor 21 is shifted from the center of the end face in the-direction shown in FIG. The welding point with 22b is shifted from the center of the end face in the + direction shown in FIG. In addition, the distance between the leg conductor A and the leg conductor B and the distance between the leg conductor A and the leg conductor C are substantially the length of the resistor, and are sufficiently wide.

前記したように、第１抵抗器２１のキャップ状電極２１ｂの端面には、温度ヒューズ３０のリード導体３ｂが溶接され、更に脚導体Ｃが側面溶接されている。従って、脚導体Ａ、Ｂ、Ｃによる支点は、図１−１の（イ）における三角形ＡＢＣの３点であり、安定な支持を保証できる。
また、第１抵抗器２１の発生熱の一部が脚導体Ｃから基板側に漏洩するが、温度ヒューズ本体３０が第１抵抗器２１と第２抵抗器２２との間に挾まれていて両側から抵抗器発生熱で焙られるから、前記熱漏洩をよく補償して温度ヒューズ本体３０を両抵抗器２１、２２の発生熱で迅速に加熱できる。従って、良好な作動迅速性を保証できる。 As described above, the lead conductor 3b of the thermal fuse 30 is welded to the end face of the cap-shaped electrode 21b of the first resistor 21, and the leg conductor C is side-welded. Therefore, the fulcrums by the leg conductors A, B, and C are the three points of the triangle ABC in FIG. 1-1 (A), and stable support can be guaranteed.
Further, a part of the heat generated by the first resistor 21 leaks from the leg conductor C to the substrate side, but the temperature fuse body 30 is sandwiched between the first resistor 21 and the second resistor 22 so that both sides Therefore, the thermal fuse body 30 can be quickly heated with the heat generated by the resistors 21 and 22 by sufficiently compensating for the heat leakage. Accordingly, it is possible to guarantee a good speed of operation.

前記図１−１に示す実施例において、第２抵抗器２２のキャップ状電極２２ａの端面にも脚導体Ｃを溶接することができる。この場合、４点支持となり、より一層安定な支持を達成できる。
前記図１−１に示す実施例において、温度ヒューズ３０のリード導体３ｂと脚導体Ｃ（４点支持の場合は、温度ヒューズ３０のリード導体３ａと図示されていない脚導体Ｃも含まれる）とを図１−２に示すように連続体とすることもできる。
前記図１−１に示す実施例においては、脚導体Ａ、Ｂ、Ｃを抵抗器のキャップ状電極２１ａ、２２ｂ、２１ｂの端面に側面接触で溶接しているが、金属直線を各キャップ状電極２１ａ、２２ｂ、２１ｂの端面に垂直に溶接し、根元近くを直角に折り曲げて各脚導体Ａ、Ｂ、Ｃを設けてもよい。 In the embodiment shown in FIG. 1-1, the leg conductor C can also be welded to the end face of the cap-like electrode 22a of the second resistor 22. In this case, four-point support is provided, and a more stable support can be achieved.
In the embodiment shown in FIG. 1-1, the lead conductor 3b and the leg conductor C of the thermal fuse 30 (in the case of four-point support, the lead conductor 3a of the thermal fuse 30 and the leg conductor C not shown) are also included. Can also be made continuous as shown in FIG.
In the embodiment shown in FIG. 1-1, the leg conductors A, B, and C are welded to the end faces of the cap electrodes 21a, 22b, and 21b of the resistor by side contact. The leg conductors A, B, and C may be provided by welding perpendicularly to the end faces of 21a, 22b, and 21b, and bending the vicinity of the root at a right angle.

図２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２の（ロ）は同じく側面図、図２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、例えば絶縁封止材充填の下側開放の扁平ケースであり、絶縁封止材露出下面から後述するように各脚導体が突出されており、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。 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. 2C 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 cover, for example, a flat case that is open on the lower side filled with an insulating sealing material, and each leg conductor protrudes from the exposed lower surface of the insulating sealing material and is transparent. Assumed by dotted lines.
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を有しており、リード導体３ａ、３ｂが平行に導出されたタイプ、所謂ラジアル型を用いることができる。例えば、並行配置の一対のリード導体の先端部間に低融点可溶合金片を溶接し、低融点可溶合金片にフラックスを塗布し、このフラックス塗布低融点可溶合金片を一端開口の耐熱扁平絶縁ケース内に収容し、扁平絶縁ケースの開口と並行リード導体との間を封止材（例えば、エポキシ樹脂接着剤）で封止したものを使用できる。 Reference numeral 3 denotes a thermal fuse, which has a main body 30 that is shorter than the resistors 21 and 22 and can be of a so-called radial type in which the lead conductors 3a and 3b are led out in parallel. For example, a low melting point soluble alloy piece is welded between the tip portions of a pair of lead conductors arranged in parallel, a flux is applied to the low melting point soluble alloy piece, and the flux-coated low melting point soluble alloy piece is heat-resistant at one end opening. It can be used that is housed in a flat insulating case and sealed between the opening of the flat insulating case and the parallel lead conductor with a sealing material (for example, epoxy resin adhesive).

この温度ヒューズ３の本体部３０が封止部を上に向け前記左右の第１抵抗器２１と第２抵抗器２２との間に挟まれて配設されている。
温度ヒューズ本体３０の一方のリード導体３ａが封止部直上で第２抵抗器のキャップ状電極２２ａに向け曲げられ更に同キャップ状電極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に向け曲げられ更に同キャップ状電極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、第１抵抗器２１のキャップ状電極２１ｂの端面には脚導体Ｃが側面接触で溶接され、これらの脚導体Ａ、Ｂ、Ｃが外被体１の下面から突出されている。
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Ｃとの間隔ｄを広くするように、脚導体Ｃと第１抵抗器２１のキャップ状電極２１ｂとの溶接点を、その端面の中心より図２の（ハ）に示すように横外側にずらし、脚導体Ｂと第２抵抗器２２のキャップ状電極２２ｂとの溶接点を、その端面の中心より図２の（ハ）に示すように横外側にずらしてある。また、脚導体Ａと脚導体Ｂとの間隔、脚導体Ａと脚導体Ｃとの間隔もほぼ抵抗器の長さとされており、充分に広くされている。 A main body 30 of the thermal fuse 3 is disposed so as to be sandwiched between the left and right first resistors 21 and the second resistor 22 with the sealing portion facing upward.
One lead conductor 3a of the thermal fuse body 30 is bent toward the cap-shaped electrode 22a of the second resistor immediately above the sealing portion, and further bent at a right angle to the end surface of the cap-shaped electrode 22a and welded by side contact. The lead conductor 3b of the fuse body 30 is bent toward the cap-shaped electrode 21b of the first resistor 21, and is bent at a right angle to the end surface of the cap-shaped electrode 21b and welded by side contact. A thermal fuse 3 is connected in series with the resistor 22. A leg conductor A is welded to the end face of the cap-shaped electrode 21a of the first resistor 21 by side contact, and a leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. A leg conductor C is welded to the end face of the cap-shaped electrode 21 b of the resistor 21 by side contact, and these leg conductors A, B, C are projected from the lower surface of the outer cover 1.
The leg conductor B is widened so that the distance d between the leg conductor B welded to the end face of the cap-shaped electrode 22b of the second resistor 22 and the leg conductor C welded to the end face of the cap-shaped electrode 21b of the first resistor 21 is increased. The welding point of the conductor C and the cap-shaped electrode 21b of the first resistor 21 is shifted laterally outward from the center of the end face as shown in FIG. The welding point with the electrode 22b is shifted laterally outward from the center of the end face as shown in FIG. In addition, the distance between the leg conductor A and the leg conductor B and the distance between the leg conductor A and the leg conductor C are substantially the length of the resistor, and are sufficiently wide.

前記したように、第１抵抗器２１のキャップ状電極２１ｂの端面には、温度ヒューズ３０のリード導体３ｂが溶接され、更に脚導体Ｃが側面溶接されている。従って、脚導体Ａ、Ｂ、Ｃによる支点は、図２の（イ）における三角形ＡＢＣの３点であり、安定な支持を保証できる。
また、第１抵抗器２１の発生熱の一部が脚導体Ｃから基板側に漏洩するが、温度ヒューズ本体３０が第１抵抗器２１と第２抵抗器２２との間に挾まれていて両側から抵抗器発生熱で焙られるから、前記熱漏洩をよく補償して温度ヒューズ本体３０を両抵抗器２１、２２の発生熱で迅速に加熱できる。従って、良好な作動迅速性を保証できる。
図２に示す実施例では、温度ヒューズがラジアル型とされ、該温度ヒューズの対称軸の向きが両抵抗器の長さ方向に直角な方向に向くように配置されているので図２の（ハ）から明らかなように、温度ヒューズ本体３０の封止部をケース部に較べて抵抗器外周面から遠く離すことができ、温度ヒューズの作動時、封止部のエポキシ樹脂が燻るのを防止するのに有効である。 As described above, the lead conductor 3b of the thermal fuse 30 is welded to the end face of the cap-shaped electrode 21b of the first resistor 21, and the leg conductor C is side-welded. Accordingly, the fulcrums by the leg conductors A, B, and C are the three points of the triangle ABC in FIG. 2A, and stable support can be guaranteed.
Further, a part of the heat generated by the first resistor 21 leaks from the leg conductor C to the substrate side, but the temperature fuse body 30 is sandwiched between the first resistor 21 and the second resistor 22 so that both sides Therefore, the thermal fuse body 30 can be quickly heated with the heat generated by the resistors 21 and 22 by sufficiently compensating for the heat leakage. Accordingly, it is possible to guarantee a good speed of operation.
In the embodiment shown in FIG. 2, the thermal fuse is a radial type, and is arranged so that the axis of symmetry of the thermal fuse is oriented in a direction perpendicular to the length direction of both resistors. As is clear from the above, the sealing portion of the thermal fuse body 30 can be separated from the outer peripheral surface of the resistor as compared with the case portion, and the epoxy resin of the sealing portion is prevented from being swollen when the thermal fuse is activated. It is effective.

前記図２に示す実施例において、第２抵抗器２２のキャップ状電極２２ａの端面にも脚導体Ｃを溶接してもよい。この場合、４点支持となり、より一層安定な支持を達成できる。
前記図２に示す実施例において、温度ヒューズ３０のリード導体３ｂと脚導体Ｃ（４点支持の場合は、温度ヒューズ３０のリード導体３ａと図示されていない脚導体Ｃも含まれる）とを連続体とすることもできる。
前記図２に示す実施例においては、脚導体Ａ、Ｂ、Ｃを抵抗器のキャップ状電極２１ａ、２２ｂ、２１ｂの端面に側面接触で溶接しているが、金属直線を各キャップ状電極２１ａ、２２ｂ、２１ｂの端面に垂直に溶接し、根元近くを直角に折り曲げて各脚導体Ａ、Ｂ、Ｃを設けてもよい。 In the embodiment shown in FIG. 2, the leg conductor C may be welded to the end face of the cap-like electrode 22a of the second resistor 22. In this case, four-point support is provided, and a more stable support can be achieved.
In the embodiment shown in FIG. 2, the lead conductor 3b of the thermal fuse 30 and the leg conductor C (in the case of four-point support, the lead conductor 3a of the thermal fuse 30 and the leg conductor C (not shown) are continuously included). It can also be a body.
In the embodiment shown in FIG. 2, the leg conductors A, B, and C are welded to the end faces of the cap-like electrodes 21a, 22b, and 21b of the resistor by side contact, but a metal straight line is connected to each cap-like electrode 21a, The leg conductors A, B, and C may be provided by welding perpendicularly to the end faces of 22b and 21b and bending the vicinity of the root at a right angle.

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、例えば絶縁封止材充填の下側開放の扁平ケースであり、絶縁封止材露出下面から後述するように各脚導体が突出されており、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 casing, for example, a flat case that is open on the lower side filled with an insulating sealing material, and each leg conductor protrudes from the exposed lower surface of the insulating sealing material and is transparent. Assumed by dotted lines.
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、アキシャル型を用いることができる。例えば、一直線で対向させたリード導体間に低融点可溶合金片を溶接し、低融点可溶合金片にフラックスを塗布し、このフラックス塗布低融点可溶合金片上に耐熱絶縁筒を挿通し、耐熱絶縁筒の各端と各リード導体との間を封止材（例えば、エポキシ樹脂接着剤）で封止したものを使用できる。 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 resistor, and an axial type can be used. For example, a low melting point soluble alloy piece is welded between the lead conductors facing each other in a straight line, a flux is applied to the low melting point soluble alloy piece, and a heat-resistant insulating cylinder is inserted over the flux coated low melting point soluble alloy piece, What sealed the space between each end of a heat-resistant insulating cylinder and each lead conductor with a sealing material (for example, epoxy resin adhesive) can be used.

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が折り返されて第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、第１抵抗器２１のキャップ状電極２１ａの端面には脚導体Ｃが側面接触で溶接され、これらの脚導体Ａ、Ｂ、Ｃ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との間隔を広くしてある。 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 a right angle to the end face of the cap-like electrode 22a of the second resistor 22 and welded by side contact, and the lead conductor 3b of the thermal fuse body 30 is folded back to form the first resistor. The cap-shaped electrode 21a is bent at right angles to the end surface and welded by side contact. Thus, the thermal fuse 3 is connected in series between the first resistor 21 and the second resistor 22. A leg conductor A is welded to the end face of the cap-shaped electrode 21b of the first resistor 21 by side contact, and a leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. A leg conductor C is welded to the end face of the cap-shaped electrode 21 a of the resistor 21 by side contact, and these leg conductors A, B, and C are projected from the lower surface of the jacket 1.
The distance between the leg conductor A welded to the end face of the cap-shaped electrode 21b 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 is increased.

しかして、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。 Thus, the welding position between the end face of the cap-shaped electrode 21b of the first resistor 21 and the leg conductor A is shifted laterally so as to approach the left side (the negative direction in the figure) of the outer periphery of the end face of the cap-shaped electrode. The welding position of the end surface of the cap-shaped electrode 22b of the 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.

図３に示す実施例では、温度ヒューズ３がアキシャル型とされ、該温度ヒューズの一方のリード導体３ａが一方の抵抗器２２の一方のキャップ状電極２２ａに接合され、温度ヒューズの他方のリード導体３ｂが折り返されて前記一方のキャップ状電極２２ａと同じ側の他方抵抗器２１端キャップ状電極２１ａに接合され、該キャップ状電極２１ａに脚導体Ｃが接合されているので、脚導体Ｃの基板へのはんだ付け個所から温度ヒューズ本体３０のヒューズエレメントまでの熱伝導経路長を長くでき、はんだ付け熱からヒューズエレメントを良好にガードできる。
前記したように、第１抵抗器２１のキャップ状電極２１ａの端面には、温度ヒューズ３０のリード導体３ｂが溶接され、更に脚導体Ｃが側面溶接されている。従って、脚導体Ａ、Ｂ、Ｃによる支点は、図３の（イ）における三角形ＡＢＣの３点であり、安定な支持を保証できる。
また、第１抵抗器２１の発生熱の一部が脚導体Ｃから基板側に漏洩するが、温度ヒューズ本体３０が第１抵抗器２１と第２抵抗器２２との間に挾まれていて両側から抵抗器発生熱で焙られるから、前記熱漏洩をよく補償して温度ヒューズ本体３０を両抵抗器２１、２２の発生熱で迅速に加熱できる。従って、良好な作動迅速性を保証できる。 In the embodiment shown in FIG. 3, the thermal fuse 3 is an axial type, one lead conductor 3a of the thermal fuse is joined to one cap-like electrode 22a of one resistor 22, and the other lead conductor of the thermal fuse. 3b is folded and joined to the other resistor 21 end cap-like electrode 21a on the same side as the one cap-like electrode 22a, and the leg conductor C is joined to the cap-like electrode 21a. The length of the heat conduction path from the soldering point to the fuse element of the thermal fuse body 30 can be increased, and the fuse element can be well guarded against soldering heat.
As described above, the lead conductor 3b of the thermal fuse 30 is welded to the end face of the cap-shaped electrode 21a of the first resistor 21, and the leg conductor C is side-welded. Accordingly, the fulcrums by the leg conductors A, B, and C are the three points of the triangle ABC in FIG. 3A, and stable support can be guaranteed.
Further, a part of the heat generated by the first resistor 21 leaks from the leg conductor C to the substrate side, but the temperature fuse body 30 is sandwiched between the first resistor 21 and the second resistor 22 so that both sides Therefore, the thermal fuse body 30 can be quickly heated with the heat generated by the resistors 21 and 22 by sufficiently compensating for the heat leakage. Accordingly, it is possible to guarantee a good speed of operation.

前記図３に示す実施例において、第２抵抗器２２のキャップ状電極２２ａの端面にも脚導体Ｃを溶接してもよい。この場合、４点支持となり、より一層安定な支持を達成できる。
前記図３に示す実施例において、温度ヒューズ３０のリード導体３ｂと脚導体Ｃ（４点支持の場合は、温度ヒューズ３０のリード導体３ａと図示されていない脚導体Ｃ）とを連続体とすることもできる。
前記図３に示す実施例においては、脚導体Ａ、Ｂ、Ｃを抵抗器のキャップ状電極２１ａ、２２ｂ、２１ｂの端面に側面接触で溶接しているが、金属直線を各キャップ状電極２１ａ、２２ｂ、２１ｂの端面に垂直に溶接し、根元近くを直角に折り曲げて各脚導体Ａ、Ｂ、Ｃを設けてもよい。 In the embodiment shown in FIG. 3, the leg conductor C may be welded to the end face of the cap-like electrode 22 a of the second resistor 22. In this case, four-point support is provided, and a more stable support can be achieved.
In the embodiment shown in FIG. 3, the lead conductor 3b of the thermal fuse 30 and the leg conductor C (in the case of four-point support, the lead conductor 3a of the thermal fuse 30 and the leg conductor C (not shown)) are made continuous. You can also.
In the embodiment shown in FIG. 3, the leg conductors A, B, and C are welded to the end faces of the cap-like electrodes 21a, 22b, and 21b of the resistor by side contact, but a metal straight line is connected to each cap-like electrode 21a, The leg conductors A, B, and C may be provided by welding perpendicularly to the end faces of 22b and 21b and bending the vicinity of the root at a right angle.

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、例えば絶縁封止材充填の下側開放の扁平ケースであり、絶縁封止材露出下面から後述するように各脚導体が突出されており、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 flat case that is open on the lower side filled with an insulating sealing material, and each leg conductor protrudes from the exposed lower surface of the insulating sealing material, and is transparent. Assumed by dotted lines.
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を有しており、リード導体３ａ、３ｂが平行に導出されたタイプ、所謂ラジアル型を用いることができる。例えば、並行配置の一対のリード導体の先端部間に低融点可溶合金片を溶接し、低融点可溶合金片にフラックスを塗布し、このフラックス塗布低融点可溶合金片を一端開口の耐熱扁平絶縁ケース内に収容し、扁平絶縁ケースの開口と並行リード導体との間を封止材（例えば、エポキシ樹脂接着剤）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が前記左右の第１抵抗器２１と第２抵抗器２２との間に封止部を横に向けて抵抗器２１，２２と並行に配設されている。
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、第２抵抗器２２のキャップ状電極２２ａの端面には脚導体Ｃが側面接触で溶接され、これらの脚導体Ａ、Ｂ、Ｃ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 a main body 30 that is shorter than the resistors 21 and 22 and can be of a so-called radial type in which the lead conductors 3a and 3b are led out in parallel. For example, a low melting point soluble alloy piece is welded between the tip portions of a pair of lead conductors arranged in parallel, a flux is applied to the low melting point soluble alloy piece, and the flux-coated low melting point soluble alloy piece is heat-resistant at one end opening. It can be used that is housed in a flat insulating case and sealed between the opening of the flat insulating case and the parallel lead conductor with a sealing material (for example, epoxy resin adhesive).
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 parallel with the resistors 21 and 22 with the sealing portion facing sideways.
The lead conductor 3a of the thermal fuse body 30 is bent at right angles to the end face of the cap-shaped electrode 22a of the second resistor 22 and welded by side contact, and the lead conductor 3b of the thermal fuse body 30 is cap-shaped of the first resistor 21. It is bent at right angles to the end face of the electrode 21a and welded by side contact. Thus, the thermal fuse 3 is connected in series between the first resistor 21 and the second resistor 22. A leg conductor A is welded to the end face of the cap-shaped electrode 21b of the first resistor 21 by side contact, and a leg conductor B is welded to the end face of the cap-shaped electrode 22b of the second resistor 22 by side contact. A leg conductor C is welded to the end face of the cap-like electrode 22 a of the resistor 22 by side contact, and these leg conductors A, B, C are projected from the lower surface of the outer cover 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外周の左側サイド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 surface of the cap-shaped electrode 21b of the first resistor 21 and the leg conductor A is shifted laterally so as to approach the left side of the outer periphery of the cap-shaped electrode end, The welding position of the end surface of the cap-shaped electrode 22b of the two-resistor 22 and the leg conductor B is shifted laterally so as to approach the right side of the outer periphery of the end surface of the cap-shaped electrode.

前記したように、第２抵抗器２２のキャップ状電極２２ａの端面には、温度ヒューズ３０のリード導体３ａが溶接され、更に脚導体Ｃが側面溶接されている。従って、脚導体Ａ、Ｂ、Ｃによる支点は、図３の（イ）における三角形ＡＢＣの３点であり、安定な支持を保証できる。
また、第２抵抗器２２の発生熱の一部が脚導体Ｃから基板側に漏洩するが、温度ヒューズ本体３０が第１抵抗器２１と第２抵抗器２２との間に挾まれていて両側から抵抗器発生熱で焙られるから、前記熱漏洩をよく補償して温度ヒューズ本体３０を両抵抗器２１、２２の発生熱で迅速に加熱できる。従って、良好な作動迅速性を保証できる。
前記脚導体Ｃからの熱漏洩のために、第２抵抗器２２の加熱温度はキャップ状電極２２ａ側が低くなる。しかるに、温度ヒューズ３０の封止部をキャップ状電極２２ａ側に臨ませているので、温度ヒューズの作動時、封止部のエポキシ樹脂が燻るのをよく防止できる。 As described above, the lead conductor 3a of the thermal fuse 30 is welded to the end face of the cap-like electrode 22a of the second resistor 22, and the leg conductor C is side-welded. Accordingly, the fulcrums by the leg conductors A, B, and C are the three points of the triangle ABC in FIG. 3A, and stable support can be guaranteed.
Further, a part of the heat generated by the second resistor 22 leaks from the leg conductor C to the substrate side, but the temperature fuse body 30 is sandwiched between the first resistor 21 and the second resistor 22 so that both sides Therefore, the thermal fuse body 30 can be quickly heated with the heat generated by the resistors 21 and 22 by sufficiently compensating for the heat leakage. Accordingly, it is possible to guarantee a good speed of operation.
Due to heat leakage from the leg conductor C, the heating temperature of the second resistor 22 is lowered on the cap-shaped electrode 22a side. However, since the sealing portion of the thermal fuse 30 faces the cap-shaped electrode 22a side, it is possible to prevent the epoxy resin in the sealing portion from dripping when the thermal fuse is activated.

前記図４に示す実施例において、第１抵抗器２１のキャップ状電極２１ａの端面にも脚導体Ｃを溶接してもよい。この場合、４点支持となり、より一層安定な支持を達成できる。
前記図４に示す実施例において、温度ヒューズ３０のリード導体３ａと脚導体Ｃ（４点支持の場合は、温度ヒューズ３０のリード導体３ｂと図示されていない脚導体Ｃ）とを連続体とすることもできる。
前記図４に示す実施例においては、脚導体Ａ、Ｂ、Ｃを抵抗器のキャップ状電極２２ａ、２２ｂ、２１ｂの端面に側面接触で溶接しているが、金属直線を各キャップ状電極２２ａ、２２ｂ、２１ｂの端面に垂直に溶接し、根元近くを直角に折り曲げて各脚導体Ａ、Ｂ、Ｃを設けてもよい。 In the embodiment shown in FIG. 4, the leg conductor C may be welded to the end face of the cap-shaped electrode 21 a of the first resistor 21. In this case, four-point support is provided, and a more stable support can be achieved.
In the embodiment shown in FIG. 4, the lead conductor 3a of the thermal fuse 30 and the leg conductor C (in the case of four-point support, the lead conductor 3b of the thermal fuse 30 and the leg conductor C not shown) are made continuous. You can also.
In the embodiment shown in FIG. 4, the leg conductors A, B, and C are welded to the end faces of the cap-like electrodes 22a, 22b, and 21b of the resistor by side contact, but a metal straight line is connected to each cap-like electrode 22a, The leg conductors A, B, and C may be provided by welding perpendicularly to the end faces of 22b and 21b and bending the vicinity of the root at a right angle.

図１〜図４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、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を、キャップ状電極端面への側面接触接合により行うことができ、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。 In the resistor with a thermal fuse shown in FIGS. 1 to 4, the longitudinal direction of the outer casing 1 and the longitudinal direction of the resistors 21 and 22 coincide with each other. Therefore, in the height direction of the outer casing 1. 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.
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.
Furthermore, the cap-shaped electrode of the resistor and the lead conductor or leg conductor can be joined by side surface contact joining to the end face of the cap-like electrode, and unlike the case of vertical implantation joining, The lead conductors and leg conductors can be housed well, 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.

本発明に係る温度ヒューズ付き抵抗器において、併設抵抗器の発熱温度は、長さ方向中央に至るほど高くなる。また、前記温度ヒューズにおいては、封止部がエポキシ樹脂などの合成樹脂で形成されているために、前記抵抗器の発生熱で発煙する惧れがある。従って、図４に示すように、温度ヒューズにラジアル型を使用し、温度ヒューズの封止部を温度ヒューズのケースよりも抵抗器のキャップ状電極に近く位置させることが好ましい。 In the resistor with a thermal fuse according to the present invention, the heat generation temperature of the auxiliary resistor increases as it reaches the center in the length direction. Further, in the thermal fuse, since the sealing portion is made of a synthetic resin such as an epoxy resin, there is a possibility that smoke is generated by the heat generated by the resistor. Therefore, as shown in FIG. 4, it is preferable to use a radial type for the thermal fuse and position the sealing portion of the thermal fuse closer to the cap-shaped electrode of the resistor than the case of the thermal fuse.

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. 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.

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
Ｃ脚導体 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 C leg conductor

Claims

A first resistor and a second resistor having cap-shaped electrodes at both ends, and a thermal fuse having a pair of lead conductors are arranged in parallel with each other in the insulating envelope, with the thermal fuse being sandwiched between the two resistors. The one lead conductor of the thermal fuse is joined to one cap-like electrode end face of 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 first resistor Leg conductor A on the other cap-like electrode end face of the resistor, leg conductor B on the other cap-like electrode end face of the second resistor, and leg conductor C on one or both cap-like electrode end faces of both resistors. A resistor with a thermal fuse, which is joined to each other, and the leg conductors protrude from the lower surface side of the outer casing.

2. The resistor with a thermal fuse according to claim 1, wherein the lead conductor of the thermal fuse and the end face of the cap-shaped electrode of the resistor are joined by welding in a side contact.

3. The resistor with a thermal fuse according to claim 1, wherein the cap-shaped electrode end face of the resistor and the leg conductor are joined by welding in a side contact.

The resistor with a thermal fuse according to any one of claims 1 to 3, wherein the leg conductor is provided with a protrusion that fits into a hole of the mounting board, or a bent portion or an uneven portion that is locked by solder. .

The temperature according to any one of claims 1 to 4, wherein the insulating jacket is a flat case open on the lower side filled with an insulating sealing material, and each leg conductor protrudes from the exposed lower surface of the insulating sealing material. Resistor with fuse.

The thermal fuse is a radial type, and the thermal fuse is arranged so that the direction of the symmetry axis of the thermal fuse is oriented in a direction perpendicular to the length direction of both resistors. Or a temperature-fused resistor.

The thermal fuse is an axial type, one lead conductor of the thermal fuse is joined to one cap-shaped electrode of the first resistor, and the other lead conductor of the thermal fuse is folded back to be the same as the one cap-shaped electrode The resistor with a thermal fuse according to claim 1, wherein a leg conductor C is joined to the cap-like electrode.

6. The thermal fuse is a radial type, and the thermal fuse is disposed so that the sealing portion of the thermal fuse is positioned closer to the cap-shaped electrode of the resistor than the case of the thermal fuse. Resistor with thermal fuse as described in any one.

9. A resistor with a thermal fuse according to claim 1, wherein the leg conductor is continuously integrated with the lead conductor of the thermal fuse.